Mercurial > cpython-lru_cache-weakref

annotate Modules/mmapmodule.c @ 70817:dd775b1561ba

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Fix markup.
author Georg Brandl <georg@python.org>
date Tue, 14 Jun 2011 21:09:55 +0200
parents 964d0d65a2a9
children 04182fa5255b
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1 /*
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2 / Author: Sam Rushing <rushing@nightmare.com>
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3 / Hacked for Unix by AMK
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4 / $Id$
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5
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6 / Modified to support mmap with offset - to map a 'window' of a file
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7 / Author: Yotam Medini yotamm@mellanox.co.il
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8 /
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9 / mmapmodule.cpp -- map a view of a file into memory
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10 /
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11 / todo: need permission flags, perhaps a 'chsize' analog
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12 / not all functions check range yet!!!
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13 /
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14 /
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15 / This version of mmapmodule.c has been changed significantly
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16 / from the original mmapfile.c on which it was based.
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17 / The original version of mmapfile is maintained by Sam at
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18 / ftp://squirl.nightmare.com/pub/python/python-ext.
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19 */
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20
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21 #define PY_SSIZE_T_CLEAN
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22 #include <Python.h>
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23
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24 #ifndef MS_WINDOWS
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25 #define UNIX
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26 # ifdef __APPLE__
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27 # include <fcntl.h>
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28 # endif
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29 #endif
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30
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31 #ifdef MS_WINDOWS
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32 #include <windows.h>
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33 static int
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34 my_getpagesize(void)
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35 {
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36 SYSTEM_INFO si;
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37 GetSystemInfo(&si);
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38 return si.dwPageSize;
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39 }
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40
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41 static int
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42 my_getallocationgranularity (void)
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43 {
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44
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45 SYSTEM_INFO si;
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46 GetSystemInfo(&si);
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47 return si.dwAllocationGranularity;
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48 }
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49
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50 #endif
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51
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52 #ifdef UNIX
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53 #include <sys/mman.h>
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54 #include <sys/stat.h>
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55
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56 #if defined(HAVE_SYSCONF) && defined(_SC_PAGESIZE)
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57 static int
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58 my_getpagesize(void)
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59 {
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60 return sysconf(_SC_PAGESIZE);
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61 }
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62
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63 #define my_getallocationgranularity my_getpagesize
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64 #else
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65 #define my_getpagesize getpagesize
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66 #endif
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67
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68 #endif /* UNIX */
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69
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70 #include <string.h>
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71
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72 #ifdef HAVE_SYS_TYPES_H
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73 #include <sys/types.h>
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74 #endif /* HAVE_SYS_TYPES_H */
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75
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76 /* Prefer MAP_ANONYMOUS since MAP_ANON is deprecated according to man page. */
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77 #if !defined(MAP_ANONYMOUS) && defined(MAP_ANON)
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78 # define MAP_ANONYMOUS MAP_ANON
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79 #endif
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80
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81 static PyObject *mmap_module_error;
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82
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83 typedef enum
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84 {
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85 ACCESS_DEFAULT,
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86 ACCESS_READ,
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87 ACCESS_WRITE,
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88 ACCESS_COPY
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89 } access_mode;
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90
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91 typedef struct {
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92 PyObject_HEAD
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93 char * data;
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94 size_t size;
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95 size_t pos; /* relative to offset */
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96 #ifdef MS_WINDOWS
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97 PY_LONG_LONG offset;
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98 #else
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99 off_t offset;
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100 #endif
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101 int exports;
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102
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103 #ifdef MS_WINDOWS
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104 HANDLE map_handle;
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105 HANDLE file_handle;
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106 char * tagname;
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107 #endif
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108
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109 #ifdef UNIX
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110 int fd;
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111 #endif
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112
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113 access_mode access;
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114 } mmap_object;
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115
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116
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117 static void
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118 mmap_object_dealloc(mmap_object *m_obj)
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119 {
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120 #ifdef MS_WINDOWS
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121 if (m_obj->data != NULL)
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122 UnmapViewOfFile (m_obj->data);
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123 if (m_obj->map_handle != NULL)
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124 CloseHandle (m_obj->map_handle);
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125 if (m_obj->file_handle != INVALID_HANDLE_VALUE)
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126 CloseHandle (m_obj->file_handle);
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127 if (m_obj->tagname)
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128 PyMem_Free(m_obj->tagname);
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129 #endif /* MS_WINDOWS */
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130
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131 #ifdef UNIX
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132 if (m_obj->fd >= 0)
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133 (void) close(m_obj->fd);
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134 if (m_obj->data!=NULL) {
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135 munmap(m_obj->data, m_obj->size);
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136 }
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137 #endif /* UNIX */
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138
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139 Py_TYPE(m_obj)->tp_free((PyObject*)m_obj);
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140 }
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141
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142 static PyObject *
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143 mmap_close_method(mmap_object *self, PyObject *unused)
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144 {
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145 if (self->exports > 0) {
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146 PyErr_SetString(PyExc_BufferError, "cannot close "\
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147 "exported pointers exist");
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148 return NULL;
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149 }
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150 #ifdef MS_WINDOWS
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151 /* For each resource we maintain, we need to check
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152 the value is valid, and if so, free the resource
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153 and set the member value to an invalid value so
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154 the dealloc does not attempt to resource clearing
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155 again.
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156 TODO - should we check for errors in the close operations???
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157 */
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158 if (self->data != NULL) {
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159 UnmapViewOfFile(self->data);
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160 self->data = NULL;
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161 }
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162 if (self->map_handle != NULL) {
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163 CloseHandle(self->map_handle);
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164 self->map_handle = NULL;
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165 }
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166 if (self->file_handle != INVALID_HANDLE_VALUE) {
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167 CloseHandle(self->file_handle);
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168 self->file_handle = INVALID_HANDLE_VALUE;
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169 }
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170 #endif /* MS_WINDOWS */
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171
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172 #ifdef UNIX
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173 if (0 <= self->fd)
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174 (void) close(self->fd);
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175 self->fd = -1;
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176 if (self->data != NULL) {
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177 munmap(self->data, self->size);
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178 self->data = NULL;
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179 }
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180 #endif
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181
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182 Py_INCREF(Py_None);
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183 return Py_None;
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184 }
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185
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186 #ifdef MS_WINDOWS
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187 #define CHECK_VALID(err) \
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188 do { \
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189 if (self->map_handle == NULL) { \
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190 PyErr_SetString(PyExc_ValueError, "mmap closed or invalid"); \
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191 return err; \
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192 } \
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193 } while (0)
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194 #endif /* MS_WINDOWS */
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195
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196 #ifdef UNIX
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197 #define CHECK_VALID(err) \
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198 do { \
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199 if (self->data == NULL) { \
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200 PyErr_SetString(PyExc_ValueError, "mmap closed or invalid"); \
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201 return err; \
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202 } \
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203 } while (0)
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204 #endif /* UNIX */
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205
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206 static PyObject *
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207 mmap_read_byte_method(mmap_object *self,
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208 PyObject *unused)
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209 {
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210 CHECK_VALID(NULL);
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211 if (self->pos < self->size) {
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212 char value = self->data[self->pos];
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213 self->pos += 1;
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214 return Py_BuildValue("B", (unsigned char)value);
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215 } else {
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216 PyErr_SetString(PyExc_ValueError, "read byte out of range");
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217 return NULL;
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218 }
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219 }
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220
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221 static PyObject *
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222 mmap_read_line_method(mmap_object *self,
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223 PyObject *unused)
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224 {
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225 char *start = self->data+self->pos;
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226 char *eof = self->data+self->size;
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227 char *eol;
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228 PyObject *result;
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229
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230 CHECK_VALID(NULL);
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231
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232 eol = memchr(start, '\n', self->size - self->pos);
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233 if (!eol)
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234 eol = eof;
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235 else
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236 ++eol; /* we're interested in the position after the
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237 newline. */
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238 result = PyBytes_FromStringAndSize(start, (eol - start));
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239 self->pos += (eol - start);
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240 return result;
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241 }
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242
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243 /* Basically the "n" format code with the ability to turn None into -1. */
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244 static int
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245 mmap_convert_ssize_t(PyObject *obj, void *result) {
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246 Py_ssize_t limit;
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247 if (obj == Py_None) {
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248 limit = -1;
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249 }
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250 else if (PyNumber_Check(obj)) {
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251 limit = PyNumber_AsSsize_t(obj, PyExc_OverflowError);
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252 if (limit == -1 && PyErr_Occurred())
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253 return 0;
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254 }
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255 else {
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256 PyErr_Format(PyExc_TypeError,
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257 "integer argument expected, got '%.200s'",
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258 Py_TYPE(obj)->tp_name);
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259 return 0;
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260 }
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261 *((Py_ssize_t *)result) = limit;
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262 return 1;
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263 }
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264
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265 static PyObject *
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266 mmap_read_method(mmap_object *self,
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267 PyObject *args)
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268 {
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269 Py_ssize_t num_bytes = -1, n;
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270 PyObject *result;
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271
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272 CHECK_VALID(NULL);
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273 if (!PyArg_ParseTuple(args, "|O&:read", mmap_convert_ssize_t, &num_bytes))
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274 return(NULL);
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275
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276 /* silently 'adjust' out-of-range requests */
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277 assert(self->size >= self->pos);
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278 n = self->size - self->pos;
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279 /* The difference can overflow, only if self->size is greater than
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280 * PY_SSIZE_T_MAX. But then the operation cannot possibly succeed,
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281 * because the mapped area and the returned string each need more
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282 * than half of the addressable memory. So we clip the size, and let
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283 * the code below raise MemoryError.
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284 */
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285 if (n < 0)
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286 n = PY_SSIZE_T_MAX;
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287 if (num_bytes < 0 || num_bytes > n) {
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288 num_bytes = n;
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289 }
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290 result = PyBytes_FromStringAndSize(self->data+self->pos, num_bytes);
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291 self->pos += num_bytes;
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292 return result;
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293 }
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294
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295 static PyObject *
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296 mmap_gfind(mmap_object *self,
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297 PyObject *args,
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298 int reverse)
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299 {
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300 Py_ssize_t start = self->pos;
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301 Py_ssize_t end = self->size;
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302 const char *needle;
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303 Py_ssize_t len;
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304
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305 CHECK_VALID(NULL);
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306 if (!PyArg_ParseTuple(args, reverse ? "y#|nn:rfind" : "y#|nn:find",
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307 &needle, &len, &start, &end)) {
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308 return NULL;
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309 } else {
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310 const char *p, *start_p, *end_p;
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311 int sign = reverse ? -1 : 1;
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312
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313 if (start < 0)
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314 start += self->size;
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315 if (start < 0)
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316 start = 0;
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317 else if ((size_t)start > self->size)
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318 start = self->size;
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319
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320 if (end < 0)
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321 end += self->size;
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322 if (end < 0)
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323 end = 0;
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324 else if ((size_t)end > self->size)
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325 end = self->size;
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326
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327 start_p = self->data + start;
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328 end_p = self->data + end;
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329
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330 for (p = (reverse ? end_p - len : start_p);
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331 (p >= start_p) && (p + len <= end_p); p += sign) {
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332 Py_ssize_t i;
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333 for (i = 0; i < len && needle[i] == p[i]; ++i)
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334 /* nothing */;
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335 if (i == len) {
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336 return PyLong_FromSsize_t(p - self->data);
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337 }
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338 }
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339 return PyLong_FromLong(-1);
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340 }
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341 }
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342
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343 static PyObject *
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344 mmap_find_method(mmap_object *self,
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345 PyObject *args)
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346 {
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347 return mmap_gfind(self, args, 0);
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348 }
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349
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350 static PyObject *
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351 mmap_rfind_method(mmap_object *self,
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352 PyObject *args)
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353 {
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354 return mmap_gfind(self, args, 1);
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355 }
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356
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357 static int
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358 is_writable(mmap_object *self)
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359 {
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360 if (self->access != ACCESS_READ)
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361 return 1;
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362 PyErr_Format(PyExc_TypeError, "mmap can't modify a readonly memory map.");
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363 return 0;
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364 }
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365
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366 static int
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367 is_resizeable(mmap_object *self)
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368 {
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369 if (self->exports > 0) {
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370 PyErr_SetString(PyExc_BufferError,
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371 "mmap can't resize with extant buffers exported.");
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372 return 0;
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373 }
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374 if ((self->access == ACCESS_WRITE) || (self->access == ACCESS_DEFAULT))
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375 return 1;
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376 PyErr_Format(PyExc_TypeError,
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377 "mmap can't resize a readonly or copy-on-write memory map.");
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378 return 0;
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379 }
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380
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381
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382 static PyObject *
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383 mmap_write_method(mmap_object *self,
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384 PyObject *args)
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385 {
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386 Py_ssize_t length;
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387 char *data;
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388
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389 CHECK_VALID(NULL);
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390 if (!PyArg_ParseTuple(args, "y#:write", &data, &length))
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391 return(NULL);
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392
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393 if (!is_writable(self))
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394 return NULL;
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395
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396 if ((self->pos + length) > self->size) {
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397 PyErr_SetString(PyExc_ValueError, "data out of range");
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398 return NULL;
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399 }
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400 memcpy(self->data+self->pos, data, length);
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401 self->pos = self->pos+length;
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402 Py_INCREF(Py_None);
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403 return Py_None;
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404 }
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405
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406 static PyObject *
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407 mmap_write_byte_method(mmap_object *self,
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408 PyObject *args)
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409 {
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410 char value;
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411
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412 CHECK_VALID(NULL);
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413 if (!PyArg_ParseTuple(args, "b:write_byte", &value))
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414 return(NULL);
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415
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416 if (!is_writable(self))
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417 return NULL;
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418
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419 if (self->pos < self->size) {
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420 *(self->data+self->pos) = value;
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421 self->pos += 1;
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422 Py_INCREF(Py_None);
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423 return Py_None;
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424 }
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425 else {
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426 PyErr_SetString(PyExc_ValueError, "write byte out of range");
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427 return NULL;
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428 }
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429 }
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430
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431 static PyObject *
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432 mmap_size_method(mmap_object *self,
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433 PyObject *unused)
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434 {
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435 CHECK_VALID(NULL);
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436
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437 #ifdef MS_WINDOWS
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438 if (self->file_handle != INVALID_HANDLE_VALUE) {
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439 DWORD low,high;
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440 PY_LONG_LONG size;
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441 low = GetFileSize(self->file_handle, &high);
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442 if (low == INVALID_FILE_SIZE) {
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443 /* It might be that the function appears to have failed,
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444 when indeed its size equals INVALID_FILE_SIZE */
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445 DWORD error = GetLastError();
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446 if (error != NO_ERROR)
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447 return PyErr_SetFromWindowsErr(error);
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448 }
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449 if (!high && low < LONG_MAX)
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450 return PyLong_FromLong((long)low);
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451 size = (((PY_LONG_LONG)high)<<32) + low;
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452 return PyLong_FromLongLong(size);
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453 } else {
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454 return PyLong_FromSsize_t(self->size);
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455 }
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456 #endif /* MS_WINDOWS */
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457
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458 #ifdef UNIX
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459 {
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460 struct stat buf;
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461 if (-1 == fstat(self->fd, &buf)) {
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462 PyErr_SetFromErrno(mmap_module_error);
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463 return NULL;
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464 }
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465 #ifdef HAVE_LARGEFILE_SUPPORT
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466 return PyLong_FromLongLong(buf.st_size);
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467 #else
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468 return PyLong_FromLong(buf.st_size);
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469 #endif
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470 }
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471 #endif /* UNIX */
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472 }
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473
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474 /* This assumes that you want the entire file mapped,
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475 / and when recreating the map will make the new file
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476 / have the new size
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477 /
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478 / Is this really necessary? This could easily be done
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479 / from python by just closing and re-opening with the
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480 / new size?
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481 */
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482
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483 static PyObject *
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484 mmap_resize_method(mmap_object *self,
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485 PyObject *args)
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486 {
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487 Py_ssize_t new_size;
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488 CHECK_VALID(NULL);
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489 if (!PyArg_ParseTuple(args, "n:resize", &new_size) ||
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490 !is_resizeable(self)) {
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491 return NULL;
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492 #ifdef MS_WINDOWS
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493 } else {
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494 DWORD dwErrCode = 0;
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495 DWORD off_hi, off_lo, newSizeLow, newSizeHigh;
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496 /* First, unmap the file view */
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497 UnmapViewOfFile(self->data);
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498 self->data = NULL;
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499 /* Close the mapping object */
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500 CloseHandle(self->map_handle);
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501 self->map_handle = NULL;
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502 /* Move to the desired EOF position */
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503 newSizeHigh = (DWORD)((self->offset + new_size) >> 32);
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504 newSizeLow = (DWORD)((self->offset + new_size) & 0xFFFFFFFF);
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505 off_hi = (DWORD)(self->offset >> 32);
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506 off_lo = (DWORD)(self->offset & 0xFFFFFFFF);
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507 SetFilePointer(self->file_handle,
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508 newSizeLow, &newSizeHigh, FILE_BEGIN);
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509 /* Change the size of the file */
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510 SetEndOfFile(self->file_handle);
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511 /* Create another mapping object and remap the file view */
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512 self->map_handle = CreateFileMapping(
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513 self->file_handle,
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514 NULL,
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515 PAGE_READWRITE,
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516 0,
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parents: 54974
diff changeset
517 0,
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
518 self->tagname);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
519 if (self->map_handle != NULL) {
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
520 self->data = (char *) MapViewOfFile(self->map_handle,
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
521 FILE_MAP_WRITE,
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
522 off_hi,
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
523 off_lo,
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
524 new_size);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
525 if (self->data != NULL) {
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
526 self->size = new_size;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
527 Py_INCREF(Py_None);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
528 return Py_None;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
529 } else {
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
530 dwErrCode = GetLastError();
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
531 CloseHandle(self->map_handle);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
532 self->map_handle = NULL;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
533 }
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
534 } else {
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
535 dwErrCode = GetLastError();
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
536 }
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diff changeset
537 PyErr_SetFromWindowsErr(dwErrCode);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
538 return NULL;
24071
8142f8d668a0 Patch #569753: Remove support for WIN16.
Martin v. Löwis <martin@v.loewis.de>
parents: 22177
diff changeset
539 #endif /* MS_WINDOWS */
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
540
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
541 #ifdef UNIX
36537
fdabdf148336 Trimmed trailing whitespace.
Tim Peters <tim.peters@gmail.com>
parents: 36536
diff changeset
542 #ifndef HAVE_MREMAP
61466
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diff changeset
543 } else {
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diff changeset
544 PyErr_SetString(PyExc_SystemError,
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diff changeset
545 "mmap: resizing not available--no mremap()");
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parents: 54974
diff changeset
546 return NULL;
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
547 #else
61466
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diff changeset
548 } else {
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diff changeset
549 void *newmap;
35612
35a99eccaca6 C89 compliance.
Armin Rigo <arigo@tunes.org>
parents: 35408
diff changeset
550
61466
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
551 if (ftruncate(self->fd, self->offset + new_size) == -1) {
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parents: 54974
diff changeset
552 PyErr_SetFromErrno(mmap_module_error);
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diff changeset
553 return NULL;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
554 }
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
555
12948
acb0261b6942 Support resizing the mapping depending on whether HAVE_MREMAP is defined
Andrew M. Kuchling <amk@amk.ca>
parents: 12945
diff changeset
556 #ifdef MREMAP_MAYMOVE
61466
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
557 newmap = mremap(self->data, self->size, new_size, MREMAP_MAYMOVE);
12948
acb0261b6942 Support resizing the mapping depending on whether HAVE_MREMAP is defined
Andrew M. Kuchling <amk@amk.ca>
parents: 12945
diff changeset
558 #else
61466
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diff changeset
559 #if defined(__NetBSD__)
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diff changeset
560 newmap = mremap(self->data, self->size, self->data, new_size, 0);
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diff changeset
561 #else
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parents: 54974
diff changeset
562 newmap = mremap(self->data, self->size, new_size, 0);
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parents: 54974
diff changeset
563 #endif /* __NetBSD__ */
12948
acb0261b6942 Support resizing the mapping depending on whether HAVE_MREMAP is defined
Andrew M. Kuchling <amk@amk.ca>
parents: 12945
diff changeset
564 #endif
61466
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diff changeset
565 if (newmap == (void *)-1)
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parents: 54974
diff changeset
566 {
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diff changeset
567 PyErr_SetFromErrno(mmap_module_error);
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parents: 54974
diff changeset
568 return NULL;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
569 }
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parents: 54974
diff changeset
570 self->data = newmap;
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parents: 54974
diff changeset
571 self->size = new_size;
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parents: 54974
diff changeset
572 Py_INCREF(Py_None);
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Antoine Pitrou <solipsis@pitrou.net>
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573 return Py_None;
12948
acb0261b6942 Support resizing the mapping depending on whether HAVE_MREMAP is defined
Andrew M. Kuchling <amk@amk.ca>
parents: 12945
diff changeset
574 #endif /* HAVE_MREMAP */
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
575 #endif /* UNIX */
61466
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diff changeset
576 }
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
577 }
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
578
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
579 static PyObject *
38669
19fd6141940d Partially merge trunk into p3yk. The removal of Mac/Tools is confusing svn
Thomas Wouters <thomas@python.org>
parents: 36882
diff changeset
580 mmap_tell_method(mmap_object *self, PyObject *unused)
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
581 {
61466
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
582 CHECK_VALID(NULL);
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parents: 54974
diff changeset
583 return PyLong_FromSize_t(self->pos);
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
584 }
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
585
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
586 static PyObject *
13441
5edee6878943 -- ANSI-fying, names
Fredrik Lundh <fredrik@pythonware.com>
parents: 13359
diff changeset
587 mmap_flush_method(mmap_object *self, PyObject *args)
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
588 {
61466
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parents: 54974
diff changeset
589 Py_ssize_t offset = 0;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
590 Py_ssize_t size = self->size;
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diff changeset
591 CHECK_VALID(NULL);
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diff changeset
592 if (!PyArg_ParseTuple(args, "|nn:flush", &offset, &size))
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parents: 54974
diff changeset
593 return NULL;
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parents: 54974
diff changeset
594 if ((size_t)(offset + size) > self->size) {
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parents: 54974
diff changeset
595 PyErr_SetString(PyExc_ValueError, "flush values out of range");
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
596 return NULL;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
597 }
66825
7253be96a19e Merged revisions 85678 via svnmerge from
R. David Murray <rdmurray@bitdance.com>
parents: 65932
diff changeset
598
7253be96a19e Merged revisions 85678 via svnmerge from
R. David Murray <rdmurray@bitdance.com>
parents: 65932
diff changeset
599 if (self->access == ACCESS_READ || self->access == ACCESS_COPY)
7253be96a19e Merged revisions 85678 via svnmerge from
R. David Murray <rdmurray@bitdance.com>
parents: 65932
diff changeset
600 return PyLong_FromLong(0);
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R. David Murray <rdmurray@bitdance.com>
parents: 65932
diff changeset
601
24071
8142f8d668a0 Patch #569753: Remove support for WIN16.
Martin v. Löwis <martin@v.loewis.de>
parents: 22177
diff changeset
602 #ifdef MS_WINDOWS
61466
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
603 return PyLong_FromLong((long) FlushViewOfFile(self->data+offset, size));
44999
7c02182e2979 Merged revisions 60284-60349 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44885
diff changeset
604 #elif defined(UNIX)
61466
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
605 /* XXX semantics of return value? */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
606 /* XXX flags for msync? */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
607 if (-1 == msync(self->data + offset, size, MS_SYNC)) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
608 PyErr_SetFromErrno(mmap_module_error);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
609 return NULL;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
610 }
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parents: 54974
diff changeset
611 return PyLong_FromLong(0);
44999
7c02182e2979 Merged revisions 60284-60349 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44885
diff changeset
612 #else
61466
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parents: 54974
diff changeset
613 PyErr_SetString(PyExc_ValueError, "flush not supported on this system");
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
614 return NULL;
44999
7c02182e2979 Merged revisions 60284-60349 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44885
diff changeset
615 #endif
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
616 }
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
617
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
618 static PyObject *
13441
5edee6878943 -- ANSI-fying, names
Fredrik Lundh <fredrik@pythonware.com>
parents: 13359
diff changeset
619 mmap_seek_method(mmap_object *self, PyObject *args)
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
620 {
61466
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parents: 54974
diff changeset
621 Py_ssize_t dist;
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parents: 54974
diff changeset
622 int how=0;
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parents: 54974
diff changeset
623 CHECK_VALID(NULL);
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parents: 54974
diff changeset
624 if (!PyArg_ParseTuple(args, "n|i:seek", &dist, &how))
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
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parents: 54974
diff changeset
625 return NULL;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
626 else {
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
627 size_t where;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
628 switch (how) {
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parents: 54974
diff changeset
629 case 0: /* relative to start */
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parents: 54974
diff changeset
630 if (dist < 0)
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
631 goto onoutofrange;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
632 where = dist;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
633 break;
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parents: 54974
diff changeset
634 case 1: /* relative to current position */
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parents: 54974
diff changeset
635 if ((Py_ssize_t)self->pos + dist < 0)
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
636 goto onoutofrange;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
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parents: 54974
diff changeset
637 where = self->pos + dist;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
638 break;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
639 case 2: /* relative to end */
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parents: 54974
diff changeset
640 if ((Py_ssize_t)self->size + dist < 0)
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
641 goto onoutofrange;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
642 where = self->size + dist;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
643 break;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
644 default:
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
645 PyErr_SetString(PyExc_ValueError, "unknown seek type");
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parents: 54974
diff changeset
646 return NULL;
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parents: 54974
diff changeset
647 }
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parents: 54974
diff changeset
648 if (where > self->size)
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diff changeset
649 goto onoutofrange;
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diff changeset
650 self->pos = where;
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diff changeset
651 Py_INCREF(Py_None);
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diff changeset
652 return Py_None;
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diff changeset
653 }
12945
5d2fb67408a7 Patch from Trent Mick:
Andrew M. Kuchling <amk@amk.ca>
parents: 12944
diff changeset
654
20970
e167b82c6444 CVS patch #477161: New "access" keyword for mmap, from Jay T Miller.
Tim Peters <tim.peters@gmail.com>
parents: 20888
diff changeset
655 onoutofrange:
61466
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diff changeset
656 PyErr_SetString(PyExc_ValueError, "seek out of range");
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diff changeset
657 return NULL;
12120
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Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
658 }
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
659
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
660 static PyObject *
13441
5edee6878943 -- ANSI-fying, names
Fredrik Lundh <fredrik@pythonware.com>
parents: 13359
diff changeset
661 mmap_move_method(mmap_object *self, PyObject *args)
12120
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Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
662 {
61466
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diff changeset
663 unsigned long dest, src, cnt;
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
664 CHECK_VALID(NULL);
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
665 if (!PyArg_ParseTuple(args, "kkk:move", &dest, &src, &cnt) ||
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
666 !is_writable(self)) {
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
667 return NULL;
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diff changeset
668 } else {
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
669 /* bounds check the values */
70696
9ef14857e49c Checking if an unsigned long is < 0 is pointless.
Brett Cannon <brett@python.org>
parents: 69754
diff changeset
670 if ((cnt + dest) < cnt || (cnt + src) < cnt ||
9ef14857e49c Checking if an unsigned long is < 0 is pointless.
Brett Cannon <brett@python.org>
parents: 69754
diff changeset
671 src > self->size || (src + cnt) > self->size ||
9ef14857e49c Checking if an unsigned long is < 0 is pointless.
Brett Cannon <brett@python.org>
parents: 69754
diff changeset
672 dest > self->size || (dest + cnt) > self->size) {
61466
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diff changeset
673 PyErr_SetString(PyExc_ValueError,
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diff changeset
674 "source, destination, or count out of range");
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parents: 54974
diff changeset
675 return NULL;
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diff changeset
676 }
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diff changeset
677 memmove(self->data+dest, self->data+src, cnt);
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diff changeset
678 Py_INCREF(Py_None);
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diff changeset
679 return Py_None;
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diff changeset
680 }
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Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
681 }
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
682
63422
cf989a34c77e #8046: add context manager protocol support to mmap objects. Also add closed property.
Georg Brandl <georg@python.org>
parents: 61466
diff changeset
683 static PyObject *
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Georg Brandl <georg@python.org>
parents: 61466
diff changeset
684 mmap_closed_get(mmap_object *self)
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Georg Brandl <georg@python.org>
parents: 61466
diff changeset
685 {
cf989a34c77e #8046: add context manager protocol support to mmap objects. Also add closed property.
Georg Brandl <georg@python.org>
parents: 61466
diff changeset
686 #ifdef MS_WINDOWS
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Georg Brandl <georg@python.org>
parents: 61466
diff changeset
687 return PyBool_FromLong(self->map_handle == NULL ? 1 : 0);
cf989a34c77e #8046: add context manager protocol support to mmap objects. Also add closed property.
Georg Brandl <georg@python.org>
parents: 61466
diff changeset
688 #elif defined(UNIX)
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Georg Brandl <georg@python.org>
parents: 61466
diff changeset
689 return PyBool_FromLong(self->data == NULL ? 1 : 0);
cf989a34c77e #8046: add context manager protocol support to mmap objects. Also add closed property.
Georg Brandl <georg@python.org>
parents: 61466
diff changeset
690 #endif
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Georg Brandl <georg@python.org>
parents: 61466
diff changeset
691 }
cf989a34c77e #8046: add context manager protocol support to mmap objects. Also add closed property.
Georg Brandl <georg@python.org>
parents: 61466
diff changeset
692
cf989a34c77e #8046: add context manager protocol support to mmap objects. Also add closed property.
Georg Brandl <georg@python.org>
parents: 61466
diff changeset
693 static PyObject *
cf989a34c77e #8046: add context manager protocol support to mmap objects. Also add closed property.
Georg Brandl <georg@python.org>
parents: 61466
diff changeset
694 mmap__enter__method(mmap_object *self, PyObject *args)
cf989a34c77e #8046: add context manager protocol support to mmap objects. Also add closed property.
Georg Brandl <georg@python.org>
parents: 61466
diff changeset
695 {
cf989a34c77e #8046: add context manager protocol support to mmap objects. Also add closed property.
Georg Brandl <georg@python.org>
parents: 61466
diff changeset
696 CHECK_VALID(NULL);
cf989a34c77e #8046: add context manager protocol support to mmap objects. Also add closed property.
Georg Brandl <georg@python.org>
parents: 61466
diff changeset
697
cf989a34c77e #8046: add context manager protocol support to mmap objects. Also add closed property.
Georg Brandl <georg@python.org>
parents: 61466
diff changeset
698 Py_INCREF(self);
cf989a34c77e #8046: add context manager protocol support to mmap objects. Also add closed property.
Georg Brandl <georg@python.org>
parents: 61466
diff changeset
699 return (PyObject *)self;
cf989a34c77e #8046: add context manager protocol support to mmap objects. Also add closed property.
Georg Brandl <georg@python.org>
parents: 61466
diff changeset
700 }
cf989a34c77e #8046: add context manager protocol support to mmap objects. Also add closed property.
Georg Brandl <georg@python.org>
parents: 61466
diff changeset
701
cf989a34c77e #8046: add context manager protocol support to mmap objects. Also add closed property.
Georg Brandl <georg@python.org>
parents: 61466
diff changeset
702 static PyObject *
cf989a34c77e #8046: add context manager protocol support to mmap objects. Also add closed property.
Georg Brandl <georg@python.org>
parents: 61466
diff changeset
703 mmap__exit__method(PyObject *self, PyObject *args)
cf989a34c77e #8046: add context manager protocol support to mmap objects. Also add closed property.
Georg Brandl <georg@python.org>
parents: 61466
diff changeset
704 {
cf989a34c77e #8046: add context manager protocol support to mmap objects. Also add closed property.
Georg Brandl <georg@python.org>
parents: 61466
diff changeset
705 return PyObject_CallMethod(self, "close", NULL);
cf989a34c77e #8046: add context manager protocol support to mmap objects. Also add closed property.
Georg Brandl <georg@python.org>
parents: 61466
diff changeset
706 }
cf989a34c77e #8046: add context manager protocol support to mmap objects. Also add closed property.
Georg Brandl <georg@python.org>
parents: 61466
diff changeset
707
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
708 static struct PyMethodDef mmap_object_methods[] = {
61466
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parents: 54974
diff changeset
709 {"close", (PyCFunction) mmap_close_method, METH_NOARGS},
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parents: 54974
diff changeset
710 {"find", (PyCFunction) mmap_find_method, METH_VARARGS},
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
711 {"rfind", (PyCFunction) mmap_rfind_method, METH_VARARGS},
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
712 {"flush", (PyCFunction) mmap_flush_method, METH_VARARGS},
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
713 {"move", (PyCFunction) mmap_move_method, METH_VARARGS},
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
714 {"read", (PyCFunction) mmap_read_method, METH_VARARGS},
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
715 {"read_byte", (PyCFunction) mmap_read_byte_method, METH_NOARGS},
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
716 {"readline", (PyCFunction) mmap_read_line_method, METH_NOARGS},
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
717 {"resize", (PyCFunction) mmap_resize_method, METH_VARARGS},
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
718 {"seek", (PyCFunction) mmap_seek_method, METH_VARARGS},
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
719 {"size", (PyCFunction) mmap_size_method, METH_NOARGS},
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
720 {"tell", (PyCFunction) mmap_tell_method, METH_NOARGS},
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
721 {"write", (PyCFunction) mmap_write_method, METH_VARARGS},
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
722 {"write_byte", (PyCFunction) mmap_write_byte_method, METH_VARARGS},
63422
cf989a34c77e #8046: add context manager protocol support to mmap objects. Also add closed property.
Georg Brandl <georg@python.org>
parents: 61466
diff changeset
723 {"__enter__", (PyCFunction) mmap__enter__method, METH_NOARGS},
cf989a34c77e #8046: add context manager protocol support to mmap objects. Also add closed property.
Georg Brandl <georg@python.org>
parents: 61466
diff changeset
724 {"__exit__", (PyCFunction) mmap__exit__method, METH_VARARGS},
61466
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
725 {NULL, NULL} /* sentinel */
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
726 };
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
727
63422
cf989a34c77e #8046: add context manager protocol support to mmap objects. Also add closed property.
Georg Brandl <georg@python.org>
parents: 61466
diff changeset
728 static PyGetSetDef mmap_object_getset[] = {
cf989a34c77e #8046: add context manager protocol support to mmap objects. Also add closed property.
Georg Brandl <georg@python.org>
parents: 61466
diff changeset
729 {"closed", (getter) mmap_closed_get, NULL, NULL},
cf989a34c77e #8046: add context manager protocol support to mmap objects. Also add closed property.
Georg Brandl <georg@python.org>
parents: 61466
diff changeset
730 {NULL}
cf989a34c77e #8046: add context manager protocol support to mmap objects. Also add closed property.
Georg Brandl <georg@python.org>
parents: 61466
diff changeset
731 };
cf989a34c77e #8046: add context manager protocol support to mmap objects. Also add closed property.
Georg Brandl <georg@python.org>
parents: 61466
diff changeset
732
cf989a34c77e #8046: add context manager protocol support to mmap objects. Also add closed property.
Georg Brandl <georg@python.org>
parents: 61466
diff changeset
733
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
734 /* Functions for treating an mmap'ed file as a buffer */
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
735
42665
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents: 42560
diff changeset
736 static int
43777
0d462d789b18 Merging the py3k-pep3137 branch back into the py3k branch.
Guido van Rossum <guido@python.org>
parents: 43734
diff changeset
737 mmap_buffer_getbuf(mmap_object *self, Py_buffer *view, int flags)
36537
fdabdf148336 Trimmed trailing whitespace.
Tim Peters <tim.peters@gmail.com>
parents: 36536
diff changeset
738 {
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
739 CHECK_VALID(-1);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
740 if (PyBuffer_FillInfo(view, (PyObject*)self, self->data, self->size,
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
741 (self->access == ACCESS_READ), flags) < 0)
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
742 return -1;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
743 self->exports++;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
744 return 0;
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
745 }
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
746
42665
85c22b4d4455 Merged in py3k-buffer branch to main line. All objects now use the buffer protocol in PEP 3118.
Travis E. Oliphant <oliphant@enthought.com>
parents: 42560
diff changeset
747 static void
43423
0476a2cc5658 Change PyBuffer to Py_buffer to be consistent with other non-object structures like Py_complex. Add some more functionality to the memoryview object.
Travis E. Oliphant <oliphant@enthought.com>
parents: 43384
diff changeset
748 mmap_buffer_releasebuf(mmap_object *self, Py_buffer *view)
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
749 {
61466
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
750 self->exports--;
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
751 }
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
752
36501
7fdc639bc5b4 Merge ssize_t branch.
Martin v. Löwis <martin@v.loewis.de>
parents: 36446
diff changeset
753 static Py_ssize_t
13441
5edee6878943 -- ANSI-fying, names
Fredrik Lundh <fredrik@pythonware.com>
parents: 13359
diff changeset
754 mmap_length(mmap_object *self)
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
755 {
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
756 CHECK_VALID(-1);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
757 return self->size;
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
758 }
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
759
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
760 static PyObject *
36501
7fdc639bc5b4 Merge ssize_t branch.
Martin v. Löwis <martin@v.loewis.de>
parents: 36446
diff changeset
761 mmap_item(mmap_object *self, Py_ssize_t i)
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
762 {
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
763 CHECK_VALID(NULL);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
764 if (i < 0 || (size_t)i >= self->size) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
765 PyErr_SetString(PyExc_IndexError, "mmap index out of range");
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
766 return NULL;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
767 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
768 return PyBytes_FromStringAndSize(self->data + i, 1);
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
769 }
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
770
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
771 static PyObject *
42954
27f0289b6835 Merge the trunk changes in. Breaks socket.ssl for now.
Thomas Wouters <thomas@python.org>
parents: 42665
diff changeset
772 mmap_subscript(mmap_object *self, PyObject *item)
27f0289b6835 Merge the trunk changes in. Breaks socket.ssl for now.
Thomas Wouters <thomas@python.org>
parents: 42665
diff changeset
773 {
61466
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
774 CHECK_VALID(NULL);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
775 if (PyIndex_Check(item)) {
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776 Py_ssize_t i = PyNumber_AsSsize_t(item, PyExc_IndexError);
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777 if (i == -1 && PyErr_Occurred())
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778 return NULL;
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779 if (i < 0)
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780 i += self->size;
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781 if (i < 0 || (size_t)i >= self->size) {
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782 PyErr_SetString(PyExc_IndexError,
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783 "mmap index out of range");
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784 return NULL;
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785 }
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786 return PyLong_FromLong(Py_CHARMASK(self->data[i]));
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787 }
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788 else if (PySlice_Check(item)) {
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diff changeset
789 Py_ssize_t start, stop, step, slicelen;
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parents: 42665
diff changeset
790
66664
62b61abd02b8 Merge branches/pep-0384.
Martin v. Löwis <martin@v.loewis.de>
parents: 65931
diff changeset
791 if (PySlice_GetIndicesEx(item, self->size,
61466
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diff changeset
792 &start, &stop, &step, &slicelen) < 0) {
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793 return NULL;
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794 }
43777
0d462d789b18 Merging the py3k-pep3137 branch back into the py3k branch.
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795
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796 if (slicelen <= 0)
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797 return PyBytes_FromStringAndSize("", 0);
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798 else if (step == 1)
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799 return PyBytes_FromStringAndSize(self->data + start,
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800 slicelen);
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801 else {
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802 char *result_buf = (char *)PyMem_Malloc(slicelen);
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803 Py_ssize_t cur, i;
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804 PyObject *result;
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805
61466
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806 if (result_buf == NULL)
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807 return PyErr_NoMemory();
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808 for (cur = start, i = 0; i < slicelen;
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809 cur += step, i++) {
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810 result_buf[i] = self->data[cur];
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811 }
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812 result = PyBytes_FromStringAndSize(result_buf,
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813 slicelen);
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814 PyMem_Free(result_buf);
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815 return result;
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816 }
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817 }
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818 else {
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819 PyErr_SetString(PyExc_TypeError,
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820 "mmap indices must be integers");
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821 return NULL;
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822 }
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823 }
27f0289b6835 Merge the trunk changes in. Breaks socket.ssl for now.
Thomas Wouters <thomas@python.org>
parents: 42665
diff changeset
824
27f0289b6835 Merge the trunk changes in. Breaks socket.ssl for now.
Thomas Wouters <thomas@python.org>
parents: 42665
diff changeset
825 static PyObject *
13441
5edee6878943 -- ANSI-fying, names
Fredrik Lundh <fredrik@pythonware.com>
parents: 13359
diff changeset
826 mmap_concat(mmap_object *self, PyObject *bb)
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ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
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parents:
diff changeset
827 {
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828 CHECK_VALID(NULL);
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829 PyErr_SetString(PyExc_SystemError,
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diff changeset
830 "mmaps don't support concatenation");
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831 return NULL;
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
832 }
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
833
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
834 static PyObject *
36501
7fdc639bc5b4 Merge ssize_t branch.
Martin v. Löwis <martin@v.loewis.de>
parents: 36446
diff changeset
835 mmap_repeat(mmap_object *self, Py_ssize_t n)
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ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
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parents:
diff changeset
836 {
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837 CHECK_VALID(NULL);
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838 PyErr_SetString(PyExc_SystemError,
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diff changeset
839 "mmaps don't support repeat operation");
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840 return NULL;
12120
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Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
841 }
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
842
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
843 static int
36501
7fdc639bc5b4 Merge ssize_t branch.
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parents: 36446
diff changeset
844 mmap_ass_item(mmap_object *self, Py_ssize_t i, PyObject *v)
12120
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parents:
diff changeset
845 {
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846 const char *buf;
36537
fdabdf148336 Trimmed trailing whitespace.
Tim Peters <tim.peters@gmail.com>
parents: 36536
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847
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848 CHECK_VALID(-1);
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849 if (i < 0 || (size_t)i >= self->size) {
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850 PyErr_SetString(PyExc_IndexError, "mmap index out of range");
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851 return -1;
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852 }
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853 if (v == NULL) {
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854 PyErr_SetString(PyExc_TypeError,
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855 "mmap object doesn't support item deletion");
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856 return -1;
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857 }
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858 if (! (PyBytes_Check(v) && PyBytes_Size(v)==1) ) {
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859 PyErr_SetString(PyExc_IndexError,
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diff changeset
860 "mmap assignment must be length-1 bytes()");
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861 return -1;
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862 }
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863 if (!is_writable(self))
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864 return -1;
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865 buf = PyBytes_AsString(v);
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866 self->data[i] = buf[0];
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867 return 0;
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parents:
diff changeset
868 }
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
869
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870 static int
27f0289b6835 Merge the trunk changes in. Breaks socket.ssl for now.
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871 mmap_ass_subscript(mmap_object *self, PyObject *item, PyObject *value)
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diff changeset
872 {
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873 CHECK_VALID(-1);
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874
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875 if (!is_writable(self))
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876 return -1;
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Guido van Rossum <guido@python.org>
parents: 43734
diff changeset
877
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878 if (PyIndex_Check(item)) {
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879 Py_ssize_t i = PyNumber_AsSsize_t(item, PyExc_IndexError);
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880 Py_ssize_t v;
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881
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882 if (i == -1 && PyErr_Occurred())
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883 return -1;
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884 if (i < 0)
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885 i += self->size;
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886 if (i < 0 || (size_t)i >= self->size) {
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887 PyErr_SetString(PyExc_IndexError,
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888 "mmap index out of range");
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889 return -1;
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890 }
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891 if (value == NULL) {
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892 PyErr_SetString(PyExc_TypeError,
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893 "mmap doesn't support item deletion");
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894 return -1;
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895 }
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896 if (!PyIndex_Check(value)) {
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897 PyErr_SetString(PyExc_TypeError,
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898 "mmap item value must be an int");
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899 return -1;
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900 }
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901 v = PyNumber_AsSsize_t(value, PyExc_TypeError);
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902 if (v == -1 && PyErr_Occurred())
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903 return -1;
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904 if (v < 0 || v > 255) {
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905 PyErr_SetString(PyExc_ValueError,
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906 "mmap item value must be "
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907 "in range(0, 256)");
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908 return -1;
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909 }
64047
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910 self->data[i] = (char) v;
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911 return 0;
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912 }
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913 else if (PySlice_Check(item)) {
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914 Py_ssize_t start, stop, step, slicelen;
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915 Py_buffer vbuf;
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916
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62b61abd02b8 Merge branches/pep-0384.
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917 if (PySlice_GetIndicesEx(item,
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918 self->size, &start, &stop,
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919 &step, &slicelen) < 0) {
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920 return -1;
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921 }
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922 if (value == NULL) {
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923 PyErr_SetString(PyExc_TypeError,
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924 "mmap object doesn't support slice deletion");
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925 return -1;
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926 }
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927 if (PyObject_GetBuffer(value, &vbuf, PyBUF_SIMPLE) < 0)
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928 return -1;
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929 if (vbuf.len != slicelen) {
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930 PyErr_SetString(PyExc_IndexError,
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931 "mmap slice assignment is wrong size");
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932 PyBuffer_Release(&vbuf);
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933 return -1;
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934 }
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935
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936 if (slicelen == 0) {
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937 }
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938 else if (step == 1) {
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939 memcpy(self->data + start, vbuf.buf, slicelen);
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940 }
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941 else {
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942 Py_ssize_t cur, i;
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943
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944 for (cur = start, i = 0;
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945 i < slicelen;
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946 cur += step, i++)
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947 {
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948 self->data[cur] = ((char *)vbuf.buf)[i];
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949 }
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950 }
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951 PyBuffer_Release(&vbuf);
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952 return 0;
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953 }
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954 else {
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955 PyErr_SetString(PyExc_TypeError,
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956 "mmap indices must be integer");
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957 return -1;
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958 }
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959 }
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960
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961 static PySequenceMethods mmap_as_sequence = {
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962 (lenfunc)mmap_length, /*sq_length*/
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963 (binaryfunc)mmap_concat, /*sq_concat*/
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964 (ssizeargfunc)mmap_repeat, /*sq_repeat*/
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965 (ssizeargfunc)mmap_item, /*sq_item*/
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966 0, /*sq_slice*/
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967 (ssizeobjargproc)mmap_ass_item, /*sq_ass_item*/
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968 0, /*sq_ass_slice*/
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969 };
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970
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971 static PyMappingMethods mmap_as_mapping = {
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972 (lenfunc)mmap_length,
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973 (binaryfunc)mmap_subscript,
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974 (objobjargproc)mmap_ass_subscript,
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975 };
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976
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977 static PyBufferProcs mmap_as_buffer = {
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978 (getbufferproc)mmap_buffer_getbuf,
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979 (releasebufferproc)mmap_buffer_releasebuf,
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980 };
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981
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982 static PyObject *
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983 new_mmap_object(PyTypeObject *type, PyObject *args, PyObject *kwdict);
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984
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985 PyDoc_STRVAR(mmap_doc,
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986 "Windows: mmap(fileno, length[, tagname[, access[, offset]]])\n\
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987 \n\
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988 Maps length bytes from the file specified by the file handle fileno,\n\
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989 and returns a mmap object. If length is larger than the current size\n\
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990 of the file, the file is extended to contain length bytes. If length\n\
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991 is 0, the maximum length of the map is the current size of the file,\n\
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992 except that if the file is empty Windows raises an exception (you cannot\n\
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993 create an empty mapping on Windows).\n\
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994 \n\
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995 Unix: mmap(fileno, length[, flags[, prot[, access[, offset]]]])\n\
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996 \n\
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997 Maps length bytes from the file specified by the file descriptor fileno,\n\
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998 and returns a mmap object. If length is 0, the maximum length of the map\n\
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999 will be the current size of the file when mmap is called.\n\
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1000 flags specifies the nature of the mapping. MAP_PRIVATE creates a\n\
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1001 private copy-on-write mapping, so changes to the contents of the mmap\n\
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1002 object will be private to this process, and MAP_SHARED creates a mapping\n\
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1003 that's shared with all other processes mapping the same areas of the file.\n\
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1004 The default value is MAP_SHARED.\n\
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1005 \n\
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1006 To map anonymous memory, pass -1 as the fileno (both versions).");
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1007
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1008
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1009 static PyTypeObject mmap_object_type = {
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1010 PyVarObject_HEAD_INIT(NULL, 0)
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1011 "mmap.mmap", /* tp_name */
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1012 sizeof(mmap_object), /* tp_size */
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1013 0, /* tp_itemsize */
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1014 /* methods */
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1015 (destructor) mmap_object_dealloc, /* tp_dealloc */
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1016 0, /* tp_print */
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1017 0, /* tp_getattr */
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1018 0, /* tp_setattr */
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1019 0, /* tp_reserved */
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1020 0, /* tp_repr */
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1021 0, /* tp_as_number */
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1022 &mmap_as_sequence, /*tp_as_sequence*/
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1023 &mmap_as_mapping, /*tp_as_mapping*/
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1024 0, /*tp_hash*/
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1025 0, /*tp_call*/
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1026 0, /*tp_str*/
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1027 PyObject_GenericGetAttr, /*tp_getattro*/
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1028 0, /*tp_setattro*/
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1029 &mmap_as_buffer, /*tp_as_buffer*/
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1030 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /*tp_flags*/
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1031 mmap_doc, /*tp_doc*/
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1032 0, /* tp_traverse */
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1033 0, /* tp_clear */
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1034 0, /* tp_richcompare */
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1035 0, /* tp_weaklistoffset */
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1036 0, /* tp_iter */
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1037 0, /* tp_iternext */
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1038 mmap_object_methods, /* tp_methods */
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1039 0, /* tp_members */
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Georg Brandl <georg@python.org>
parents: 61466
diff changeset
1040 mmap_object_getset, /* tp_getset */
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1041 0, /* tp_base */
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1042 0, /* tp_dict */
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1043 0, /* tp_descr_get */
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1044 0, /* tp_descr_set */
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1045 0, /* tp_dictoffset */
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1046 0, /* tp_init */
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1047 PyType_GenericAlloc, /* tp_alloc */
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1048 new_mmap_object, /* tp_new */
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1049 PyObject_Del, /* tp_free */
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Andrew M. Kuchling <amk@amk.ca>
parents:
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1050 };
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
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1051
12945
5d2fb67408a7 Patch from Trent Mick:
Andrew M. Kuchling <amk@amk.ca>
parents: 12944
diff changeset
1052
5d2fb67408a7 Patch from Trent Mick:
Andrew M. Kuchling <amk@amk.ca>
parents: 12944
diff changeset
1053 /* extract the map size from the given PyObject
5d2fb67408a7 Patch from Trent Mick:
Andrew M. Kuchling <amk@amk.ca>
parents: 12944
diff changeset
1054
13620
5b727ab37092 Spelling fixes supplied by Rob W. W. Hooft. All these are fixes in either
Thomas Wouters <thomas@python.org>
parents: 13463
diff changeset
1055 Returns -1 on error, with an appropriate Python exception raised. On
12945
5d2fb67408a7 Patch from Trent Mick:
Andrew M. Kuchling <amk@amk.ca>
parents: 12944
diff changeset
1056 success, the map size is returned. */
36541
f7f0d2a5b20b Remove size restrictions.
Martin v. Löwis <martin@v.loewis.de>
parents: 36540
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1057 static Py_ssize_t
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1058 _GetMapSize(PyObject *o, const char* param)
12945
5d2fb67408a7 Patch from Trent Mick:
Andrew M. Kuchling <amk@amk.ca>
parents: 12944
diff changeset
1059 {
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1060 if (o == NULL)
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1061 return 0;
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1062 if (PyIndex_Check(o)) {
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1063 Py_ssize_t i = PyNumber_AsSsize_t(o, PyExc_OverflowError);
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1064 if (i==-1 && PyErr_Occurred())
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1065 return -1;
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1066 if (i < 0) {
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1067 PyErr_Format(PyExc_OverflowError,
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1068 "memory mapped %s must be positive",
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1069 param);
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1070 return -1;
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1071 }
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1072 return i;
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1073 }
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Andrew M. Kuchling <amk@amk.ca>
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1074
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1075 PyErr_SetString(PyExc_TypeError, "map size must be an integral value");
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1076 return -1;
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Andrew M. Kuchling <amk@amk.ca>
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1077 }
5d2fb67408a7 Patch from Trent Mick:
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1078
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Tim Peters <tim.peters@gmail.com>
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1079 #ifdef UNIX
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1080 #ifdef HAVE_LARGEFILE_SUPPORT
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1081 #define _Py_PARSE_OFF_T "L"
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1082 #else
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1083 #define _Py_PARSE_OFF_T "l"
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1084 #endif
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1085
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1086 static PyObject *
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1087 new_mmap_object(PyTypeObject *type, PyObject *args, PyObject *kwdict)
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Andrew M. Kuchling <amk@amk.ca>
parents:
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1088 {
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1089 #ifdef HAVE_FSTAT
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1090 struct stat st;
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1091 #endif
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1092 mmap_object *m_obj;
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1093 PyObject *map_size_obj = NULL;
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1094 Py_ssize_t map_size;
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1095 off_t offset = 0;
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1096 int fd, flags = MAP_SHARED, prot = PROT_WRITE | PROT_READ;
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1097 int devzero = -1;
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1098 int access = (int)ACCESS_DEFAULT;
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1099 static char *keywords[] = {"fileno", "length",
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1100 "flags", "prot",
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1101 "access", "offset", NULL};
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parents:
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1102
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1103 if (!PyArg_ParseTupleAndKeywords(args, kwdict, "iO|iii" _Py_PARSE_OFF_T, keywords,
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1104 &fd, &map_size_obj, &flags, &prot,
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1105 &access, &offset))
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1106 return NULL;
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1107 map_size = _GetMapSize(map_size_obj, "size");
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1108 if (map_size < 0)
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1109 return NULL;
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1110 if (offset < 0) {
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1111 PyErr_SetString(PyExc_OverflowError,
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1112 "memory mapped offset must be positive");
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1113 return NULL;
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1114 }
20970
e167b82c6444 CVS patch #477161: New "access" keyword for mmap, from Jay T Miller.
Tim Peters <tim.peters@gmail.com>
parents: 20888
diff changeset
1115
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1116 if ((access != (int)ACCESS_DEFAULT) &&
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1117 ((flags != MAP_SHARED) || (prot != (PROT_WRITE | PROT_READ))))
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1118 return PyErr_Format(PyExc_ValueError,
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1119 "mmap can't specify both access and flags, prot.");
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1120 switch ((access_mode)access) {
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1121 case ACCESS_READ:
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1122 flags = MAP_SHARED;
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1123 prot = PROT_READ;
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1124 break;
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1125 case ACCESS_WRITE:
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1126 flags = MAP_SHARED;
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1127 prot = PROT_READ | PROT_WRITE;
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1128 break;
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1129 case ACCESS_COPY:
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1130 flags = MAP_PRIVATE;
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1131 prot = PROT_READ | PROT_WRITE;
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1132 break;
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1133 case ACCESS_DEFAULT:
68268
97a5590b9291 Issue #11391: Writing to a mmap object created with
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1134 /* map prot to access type */
97a5590b9291 Issue #11391: Writing to a mmap object created with
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1135 if ((prot & PROT_READ) && (prot & PROT_WRITE)) {
97a5590b9291 Issue #11391: Writing to a mmap object created with
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1136 /* ACCESS_DEFAULT */
97a5590b9291 Issue #11391: Writing to a mmap object created with
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1137 }
97a5590b9291 Issue #11391: Writing to a mmap object created with
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1138 else if (prot & PROT_WRITE) {
97a5590b9291 Issue #11391: Writing to a mmap object created with
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1139 access = ACCESS_WRITE;
97a5590b9291 Issue #11391: Writing to a mmap object created with
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1140 }
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1141 else {
97a5590b9291 Issue #11391: Writing to a mmap object created with
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1142 access = ACCESS_READ;
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1143 }
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1144 break;
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1145 default:
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1146 return PyErr_Format(PyExc_ValueError,
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1147 "mmap invalid access parameter.");
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1148 }
25130
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Neal Norwitz <nnorwitz@gmail.com>
parents: 24363
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1149
69753
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Victor Stinner <victor.stinner@haypocalc.com>
parents: 68268
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1150 #ifdef __APPLE__
cb464f8fb3a1 Issue #11277: mmap calls fcntl(fd, F_FULLFSYNC) on Mac OS X to get around a
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68268
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1151 /* Issue #11277: fsync(2) is not enough on OS X - a special, OS X specific
cb464f8fb3a1 Issue #11277: mmap calls fcntl(fd, F_FULLFSYNC) on Mac OS X to get around a
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68268
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1152 fcntl(2) is necessary to force DISKSYNC and get around mmap(2) bug */
cb464f8fb3a1 Issue #11277: mmap calls fcntl(fd, F_FULLFSYNC) on Mac OS X to get around a
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68268
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1153 if (fd != -1)
cb464f8fb3a1 Issue #11277: mmap calls fcntl(fd, F_FULLFSYNC) on Mac OS X to get around a
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68268
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1154 (void)fcntl(fd, F_FULLFSYNC);
cb464f8fb3a1 Issue #11277: mmap calls fcntl(fd, F_FULLFSYNC) on Mac OS X to get around a
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68268
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1155 #endif
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1156 #ifdef HAVE_FSTAT
28949
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Martin v. Löwis <martin@v.loewis.de>
parents: 28558
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1157 # ifdef __VMS
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1158 /* on OpenVMS we must ensure that all bytes are written to the file */
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1159 if (fd != -1) {
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1160 fsync(fd);
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1161 }
28949
ac487a7f7f2c Patch #708495: Port more stuff to OpenVMS.
Martin v. Löwis <martin@v.loewis.de>
parents: 28558
diff changeset
1162 # endif
61466
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1163 if (fd != -1 && fstat(fd, &st) == 0 && S_ISREG(st.st_mode)) {
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1164 if (map_size == 0) {
67707
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diff changeset
1165 if (offset >= st.st_size) {
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1166 PyErr_SetString(PyExc_ValueError,
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diff changeset
1167 "mmap offset is greater than file size");
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1168 return NULL;
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1169 }
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1170 off_t calc_size = st.st_size - offset;
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1171 map_size = calc_size;
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1172 if (map_size != calc_size) {
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1173 PyErr_SetString(PyExc_ValueError,
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1174 "mmap length is too large");
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1175 return NULL;
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1176 }
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1177 } else if (offset + (size_t)map_size > st.st_size) {
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1178 PyErr_SetString(PyExc_ValueError,
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diff changeset
1179 "mmap length is greater than file size");
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1180 return NULL;
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1181 }
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1182 }
25130
368bc3a4919e SF bug # 585792, Invalid mmap crashes Python interpreter
Neal Norwitz <nnorwitz@gmail.com>
parents: 24363
diff changeset
1183 #endif
61466
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1184 m_obj = (mmap_object *)type->tp_alloc(type, 0);
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diff changeset
1185 if (m_obj == NULL) {return NULL;}
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diff changeset
1186 m_obj->data = NULL;
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1187 m_obj->size = (size_t) map_size;
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1188 m_obj->pos = (size_t) 0;
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diff changeset
1189 m_obj->exports = 0;
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1190 m_obj->offset = offset;
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1191 if (fd == -1) {
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1192 m_obj->fd = -1;
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1193 /* Assume the caller wants to map anonymous memory.
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1194 This is the same behaviour as Windows. mmap.mmap(-1, size)
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1195 on both Windows and Unix map anonymous memory.
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1196 */
36446
02f0744a9cd0 Patch #1407135, bug #1424041, make mmap.mmap(-1, length) work the same
Neal Norwitz <nnorwitz@gmail.com>
parents: 36445
diff changeset
1197 #ifdef MAP_ANONYMOUS
61466
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1198 /* BSD way to map anonymous memory */
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diff changeset
1199 flags |= MAP_ANONYMOUS;
36446
02f0744a9cd0 Patch #1407135, bug #1424041, make mmap.mmap(-1, length) work the same
Neal Norwitz <nnorwitz@gmail.com>
parents: 36445
diff changeset
1200 #else
61466
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1201 /* SVR4 method to map anonymous memory is to open /dev/zero */
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diff changeset
1202 fd = devzero = open("/dev/zero", O_RDWR);
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1203 if (devzero == -1) {
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1204 Py_DECREF(m_obj);
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1205 PyErr_SetFromErrno(mmap_module_error);
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1206 return NULL;
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1207 }
36446
02f0744a9cd0 Patch #1407135, bug #1424041, make mmap.mmap(-1, length) work the same
Neal Norwitz <nnorwitz@gmail.com>
parents: 36445
diff changeset
1208 #endif
61466
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1209 } else {
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1210 m_obj->fd = dup(fd);
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1211 if (m_obj->fd == -1) {
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1212 Py_DECREF(m_obj);
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1213 PyErr_SetFromErrno(mmap_module_error);
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1214 return NULL;
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1215 }
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1216 }
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diff changeset
1217
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1218 m_obj->data = mmap(NULL, map_size,
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diff changeset
1219 prot, flags,
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diff changeset
1220 fd, offset);
36446
02f0744a9cd0 Patch #1407135, bug #1424041, make mmap.mmap(-1, length) work the same
Neal Norwitz <nnorwitz@gmail.com>
parents: 36445
diff changeset
1221
61466
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1222 if (devzero != -1) {
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1223 close(devzero);
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1224 }
36446
02f0744a9cd0 Patch #1407135, bug #1424041, make mmap.mmap(-1, length) work the same
Neal Norwitz <nnorwitz@gmail.com>
parents: 36445
diff changeset
1225
61466
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1226 if (m_obj->data == (char *)-1) {
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1227 m_obj->data = NULL;
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1228 Py_DECREF(m_obj);
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1229 PyErr_SetFromErrno(mmap_module_error);
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diff changeset
1230 return NULL;
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1231 }
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1232 m_obj->access = (access_mode)access;
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diff changeset
1233 return (PyObject *)m_obj;
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1234 }
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1235 #endif /* UNIX */
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1236
24071
8142f8d668a0 Patch #569753: Remove support for WIN16.
Martin v. Löwis <martin@v.loewis.de>
parents: 22177
diff changeset
1237 #ifdef MS_WINDOWS
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1238
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1239 /* A note on sizes and offsets: while the actual map size must hold in a
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1240 Py_ssize_t, both the total file size and the start offset can be longer
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1241 than a Py_ssize_t, so we use PY_LONG_LONG which is always 64-bit.
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1242 */
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1243
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1244 static PyObject *
44859
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Georg Brandl <georg@python.org>
parents: 44834
diff changeset
1245 new_mmap_object(PyTypeObject *type, PyObject *args, PyObject *kwdict)
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1246 {
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1247 mmap_object *m_obj;
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1248 PyObject *map_size_obj = NULL;
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diff changeset
1249 Py_ssize_t map_size;
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1250 PY_LONG_LONG offset = 0, size;
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1251 DWORD off_hi; /* upper 32 bits of offset */
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diff changeset
1252 DWORD off_lo; /* lower 32 bits of offset */
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diff changeset
1253 DWORD size_hi; /* upper 32 bits of size */
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diff changeset
1254 DWORD size_lo; /* lower 32 bits of size */
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diff changeset
1255 char *tagname = "";
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diff changeset
1256 DWORD dwErr = 0;
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diff changeset
1257 int fileno;
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1258 HANDLE fh = 0;
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1259 int access = (access_mode)ACCESS_DEFAULT;
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1260 DWORD flProtect, dwDesiredAccess;
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diff changeset
1261 static char *keywords[] = { "fileno", "length",
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diff changeset
1262 "tagname",
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1263 "access", "offset", NULL };
12146
e8c30e69666b Hacked for Win32 by Mark Hammond.
Guido van Rossum <guido@python.org>
parents: 12120
diff changeset
1264
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1265 if (!PyArg_ParseTupleAndKeywords(args, kwdict, "iO|ziL", keywords,
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1266 &fileno, &map_size_obj,
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1267 &tagname, &access, &offset)) {
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1268 return NULL;
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1269 }
20970
e167b82c6444 CVS patch #477161: New "access" keyword for mmap, from Jay T Miller.
Tim Peters <tim.peters@gmail.com>
parents: 20888
diff changeset
1270
61466
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diff changeset
1271 switch((access_mode)access) {
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diff changeset
1272 case ACCESS_READ:
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1273 flProtect = PAGE_READONLY;
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1274 dwDesiredAccess = FILE_MAP_READ;
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1275 break;
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1276 case ACCESS_DEFAULT: case ACCESS_WRITE:
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1277 flProtect = PAGE_READWRITE;
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1278 dwDesiredAccess = FILE_MAP_WRITE;
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1279 break;
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1280 case ACCESS_COPY:
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1281 flProtect = PAGE_WRITECOPY;
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diff changeset
1282 dwDesiredAccess = FILE_MAP_COPY;
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diff changeset
1283 break;
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diff changeset
1284 default:
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diff changeset
1285 return PyErr_Format(PyExc_ValueError,
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diff changeset
1286 "mmap invalid access parameter.");
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diff changeset
1287 }
20970
e167b82c6444 CVS patch #477161: New "access" keyword for mmap, from Jay T Miller.
Tim Peters <tim.peters@gmail.com>
parents: 20888
diff changeset
1288
61466
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diff changeset
1289 map_size = _GetMapSize(map_size_obj, "size");
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diff changeset
1290 if (map_size < 0)
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1291 return NULL;
68054
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1292 if (offset < 0) {
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1293 PyErr_SetString(PyExc_OverflowError,
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1294 "memory mapped offset must be positive");
61466
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diff changeset
1295 return NULL;
68054
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1296 }
36537
fdabdf148336 Trimmed trailing whitespace.
Tim Peters <tim.peters@gmail.com>
parents: 36536
diff changeset
1297
61466
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diff changeset
1298 /* assume -1 and 0 both mean invalid filedescriptor
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diff changeset
1299 to 'anonymously' map memory.
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diff changeset
1300 XXX: fileno == 0 is a valid fd, but was accepted prior to 2.5.
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diff changeset
1301 XXX: Should this code be added?
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1302 if (fileno == 0)
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1303 PyErr_WarnEx(PyExc_DeprecationWarning,
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diff changeset
1304 "don't use 0 for anonymous memory",
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diff changeset
1305 1);
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1306 */
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1307 if (fileno != -1 && fileno != 0) {
63425
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diff changeset
1308 /* Ensure that fileno is within the CRT's valid range */
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diff changeset
1309 if (_PyVerify_fd(fileno) == 0) {
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1310 PyErr_SetFromErrno(mmap_module_error);
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1311 return NULL;
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1312 }
61466
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diff changeset
1313 fh = (HANDLE)_get_osfhandle(fileno);
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1314 if (fh==(HANDLE)-1) {
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diff changeset
1315 PyErr_SetFromErrno(mmap_module_error);
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diff changeset
1316 return NULL;
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1317 }
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diff changeset
1318 /* Win9x appears to need us seeked to zero */
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diff changeset
1319 lseek(fileno, 0, SEEK_SET);
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diff changeset
1320 }
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1321
61466
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diff changeset
1322 m_obj = (mmap_object *)type->tp_alloc(type, 0);
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diff changeset
1323 if (m_obj == NULL)
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1324 return NULL;
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1325 /* Set every field to an invalid marker, so we can safely
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diff changeset
1326 destruct the object in the face of failure */
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1327 m_obj->data = NULL;
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1328 m_obj->file_handle = INVALID_HANDLE_VALUE;
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1329 m_obj->map_handle = NULL;
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diff changeset
1330 m_obj->tagname = NULL;
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diff changeset
1331 m_obj->offset = offset;
13757
67b9b05ce5a5 Fixes for Windows (but also tested on Linux). Test suite now completes, and this module should not leak in the face of errors.
Mark Hammond <mhammond@skippinet.com.au>
parents: 13620
diff changeset
1332
61466
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1333 if (fh) {
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1334 /* It is necessary to duplicate the handle, so the
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diff changeset
1335 Python code can close it on us */
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diff changeset
1336 if (!DuplicateHandle(
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diff changeset
1337 GetCurrentProcess(), /* source process handle */
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diff changeset
1338 fh, /* handle to be duplicated */
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diff changeset
1339 GetCurrentProcess(), /* target proc handle */
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diff changeset
1340 (LPHANDLE)&m_obj->file_handle, /* result */
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diff changeset
1341 0, /* access - ignored due to options value */
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diff changeset
1342 FALSE, /* inherited by child processes? */
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diff changeset
1343 DUPLICATE_SAME_ACCESS)) { /* options */
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diff changeset
1344 dwErr = GetLastError();
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1345 Py_DECREF(m_obj);
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diff changeset
1346 PyErr_SetFromWindowsErr(dwErr);
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diff changeset
1347 return NULL;
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1348 }
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1349 if (!map_size) {
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diff changeset
1350 DWORD low,high;
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diff changeset
1351 low = GetFileSize(fh, &high);
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diff changeset
1352 /* low might just happen to have the value INVALID_FILE_SIZE;
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diff changeset
1353 so we need to check the last error also. */
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1354 if (low == INVALID_FILE_SIZE &&
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diff changeset
1355 (dwErr = GetLastError()) != NO_ERROR) {
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1356 Py_DECREF(m_obj);
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diff changeset
1357 return PyErr_SetFromWindowsErr(dwErr);
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1358 }
43777
0d462d789b18 Merging the py3k-pep3137 branch back into the py3k branch.
Guido van Rossum <guido@python.org>
parents: 43734
diff changeset
1359
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1360 size = (((PY_LONG_LONG) high) << 32) + low;
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1361 if (offset >= size) {
67707
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diff changeset
1362 PyErr_SetString(PyExc_ValueError,
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diff changeset
1363 "mmap offset is greater than file size");
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1364 Py_DECREF(m_obj);
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1365 return NULL;
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1366 }
68054
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1367 if (offset - size > PY_SSIZE_T_MAX)
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1368 /* Map area too large to fit in memory */
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diff changeset
1369 m_obj->size = (Py_ssize_t) -1;
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1370 else
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1371 m_obj->size = (Py_ssize_t) (size - offset);
61466
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1372 } else {
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1373 m_obj->size = map_size;
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1374 size = offset + map_size;
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1375 }
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1376 }
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1377 else {
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1378 m_obj->size = map_size;
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1379 size = offset + map_size;
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1380 }
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1381
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1382 /* set the initial position */
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1383 m_obj->pos = (size_t) 0;
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1384
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1385 m_obj->exports = 0;
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diff changeset
1386 /* set the tag name */
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1387 if (tagname != NULL && *tagname != '\0') {
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diff changeset
1388 m_obj->tagname = PyMem_Malloc(strlen(tagname)+1);
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diff changeset
1389 if (m_obj->tagname == NULL) {
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1390 PyErr_NoMemory();
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1391 Py_DECREF(m_obj);
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1392 return NULL;
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1393 }
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1394 strcpy(m_obj->tagname, tagname);
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1395 }
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1396 else
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1397 m_obj->tagname = NULL;
13757
67b9b05ce5a5 Fixes for Windows (but also tested on Linux). Test suite now completes, and this module should not leak in the face of errors.
Mark Hammond <mhammond@skippinet.com.au>
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diff changeset
1398
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1399 m_obj->access = (access_mode)access;
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1400 size_hi = (DWORD)(size >> 32);
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1401 size_lo = (DWORD)(size & 0xFFFFFFFF);
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1402 off_hi = (DWORD)(offset >> 32);
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1403 off_lo = (DWORD)(offset & 0xFFFFFFFF);
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1404 /* For files, it would be sufficient to pass 0 as size.
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1405 For anonymous maps, we have to pass the size explicitly. */
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diff changeset
1406 m_obj->map_handle = CreateFileMapping(m_obj->file_handle,
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
1407 NULL,
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
1408 flProtect,
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
1409 size_hi,
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
1410 size_lo,
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
1411 m_obj->tagname);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
1412 if (m_obj->map_handle != NULL) {
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
1413 m_obj->data = (char *) MapViewOfFile(m_obj->map_handle,
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
1414 dwDesiredAccess,
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
1415 off_hi,
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parents: 54974
diff changeset
1416 off_lo,
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parents: 54974
diff changeset
1417 m_obj->size);
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parents: 54974
diff changeset
1418 if (m_obj->data != NULL)
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
1419 return (PyObject *)m_obj;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
1420 else {
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
1421 dwErr = GetLastError();
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
1422 CloseHandle(m_obj->map_handle);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
1423 m_obj->map_handle = NULL;
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parents: 54974
diff changeset
1424 }
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parents: 54974
diff changeset
1425 } else
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parents: 54974
diff changeset
1426 dwErr = GetLastError();
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
1427 Py_DECREF(m_obj);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
1428 PyErr_SetFromWindowsErr(dwErr);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
1429 return NULL;
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1430 }
24071
8142f8d668a0 Patch #569753: Remove support for WIN16.
Martin v. Löwis <martin@v.loewis.de>
parents: 22177
diff changeset
1431 #endif /* MS_WINDOWS */
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1432
39610
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents: 39442
diff changeset
1433 static void
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents: 39442
diff changeset
1434 setint(PyObject *d, const char *name, long value)
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents: 39442
diff changeset
1435 {
61466
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parents: 54974
diff changeset
1436 PyObject *o = PyLong_FromLong(value);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
1437 if (o && PyDict_SetItemString(d, name, o) == 0) {
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
1438 Py_DECREF(o);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
1439 }
39610
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents: 39442
diff changeset
1440 }
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents: 39442
diff changeset
1441
47580
94f64f11fdd0 Implement PEP 3121: new module initialization and finalization API.
Martin v. Löwis <martin@v.loewis.de>
parents: 47301
diff changeset
1442
94f64f11fdd0 Implement PEP 3121: new module initialization and finalization API.
Martin v. Löwis <martin@v.loewis.de>
parents: 47301
diff changeset
1443 static struct PyModuleDef mmapmodule = {
61466
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diff changeset
1444 PyModuleDef_HEAD_INIT,
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
1445 "mmap",
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
1446 NULL,
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
1447 -1,
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
1448 NULL,
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
1449 NULL,
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
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parents: 54974
diff changeset
1450 NULL,
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
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parents: 54974
diff changeset
1451 NULL,
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diff changeset
1452 NULL
47580
94f64f11fdd0 Implement PEP 3121: new module initialization and finalization API.
Martin v. Löwis <martin@v.loewis.de>
parents: 47301
diff changeset
1453 };
94f64f11fdd0 Implement PEP 3121: new module initialization and finalization API.
Martin v. Löwis <martin@v.loewis.de>
parents: 47301
diff changeset
1454
24363
979ff5d0ae07 Replace DL_IMPORT with PyMODINIT_FUNC and remove "/export:init..." link
Mark Hammond <mhammond@skippinet.com.au>
parents: 24071
diff changeset
1455 PyMODINIT_FUNC
47580
94f64f11fdd0 Implement PEP 3121: new module initialization and finalization API.
Martin v. Löwis <martin@v.loewis.de>
parents: 47301
diff changeset
1456 PyInit_mmap(void)
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1457 {
61466
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
1458 PyObject *dict, *module;
15851
a3c1a234cee7 SF bug 128713: type(mmap_object) blew up on Linux.
Tim Peters <tim.peters@gmail.com>
parents: 15803
diff changeset
1459
61466
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parents: 54974
diff changeset
1460 if (PyType_Ready(&mmap_object_type) < 0)
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
1461 return NULL;
15851
a3c1a234cee7 SF bug 128713: type(mmap_object) blew up on Linux.
Tim Peters <tim.peters@gmail.com>
parents: 15803
diff changeset
1462
61466
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parents: 54974
diff changeset
1463 module = PyModule_Create(&mmapmodule);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
1464 if (module == NULL)
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parents: 54974
diff changeset
1465 return NULL;
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parents: 54974
diff changeset
1466 dict = PyModule_GetDict(module);
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parents: 54974
diff changeset
1467 if (!dict)
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parents: 54974
diff changeset
1468 return NULL;
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parents: 54974
diff changeset
1469 mmap_module_error = PyErr_NewException("mmap.error",
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parents: 54974
diff changeset
1470 PyExc_EnvironmentError , NULL);
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parents: 54974
diff changeset
1471 if (mmap_module_error == NULL)
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parents: 54974
diff changeset
1472 return NULL;
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parents: 54974
diff changeset
1473 PyDict_SetItemString(dict, "error", mmap_module_error);
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parents: 54974
diff changeset
1474 PyDict_SetItemString(dict, "mmap", (PyObject*) &mmap_object_type);
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1475 #ifdef PROT_EXEC
61466
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parents: 54974
diff changeset
1476 setint(dict, "PROT_EXEC", PROT_EXEC);
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1477 #endif
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1478 #ifdef PROT_READ
61466
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parents: 54974
diff changeset
1479 setint(dict, "PROT_READ", PROT_READ);
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1480 #endif
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1481 #ifdef PROT_WRITE
61466
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parents: 54974
diff changeset
1482 setint(dict, "PROT_WRITE", PROT_WRITE);
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1483 #endif
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1484
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1485 #ifdef MAP_SHARED
61466
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parents: 54974
diff changeset
1486 setint(dict, "MAP_SHARED", MAP_SHARED);
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1487 #endif
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1488 #ifdef MAP_PRIVATE
61466
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parents: 54974
diff changeset
1489 setint(dict, "MAP_PRIVATE", MAP_PRIVATE);
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1490 #endif
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1491 #ifdef MAP_DENYWRITE
61466
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parents: 54974
diff changeset
1492 setint(dict, "MAP_DENYWRITE", MAP_DENYWRITE);
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1493 #endif
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1494 #ifdef MAP_EXECUTABLE
61466
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parents: 54974
diff changeset
1495 setint(dict, "MAP_EXECUTABLE", MAP_EXECUTABLE);
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1496 #endif
36446
02f0744a9cd0 Patch #1407135, bug #1424041, make mmap.mmap(-1, length) work the same
Neal Norwitz <nnorwitz@gmail.com>
parents: 36445
diff changeset
1497 #ifdef MAP_ANONYMOUS
61466
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parents: 54974
diff changeset
1498 setint(dict, "MAP_ANON", MAP_ANONYMOUS);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
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parents: 54974
diff changeset
1499 setint(dict, "MAP_ANONYMOUS", MAP_ANONYMOUS);
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1500 #endif
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1501
61466
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parents: 54974
diff changeset
1502 setint(dict, "PAGESIZE", (long)my_getpagesize());
20970
e167b82c6444 CVS patch #477161: New "access" keyword for mmap, from Jay T Miller.
Tim Peters <tim.peters@gmail.com>
parents: 20888
diff changeset
1503
61466
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parents: 54974
diff changeset
1504 setint(dict, "ALLOCATIONGRANULARITY", (long)my_getallocationgranularity());
43734
3e5edf19d5f0 Merged revisions 58221-58741 via svnmerge from
Guido van Rossum <guido@python.org>
parents: 43423
diff changeset
1505
61466
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parents: 54974
diff changeset
1506 setint(dict, "ACCESS_READ", ACCESS_READ);
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parents: 54974
diff changeset
1507 setint(dict, "ACCESS_WRITE", ACCESS_WRITE);
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parents: 54974
diff changeset
1508 setint(dict, "ACCESS_COPY", ACCESS_COPY);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54974
diff changeset
1509 return module;
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1510 }