Mercurial > cpython-lru_cache-weakref

annotate Python/thread_os2.h @ 40053:693ff5d73412 2.4

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Port of universal binary support for Mac OSX from python 2.5. This takes away the need for the out-of-tree universal binary support that was used to build the 2.4.3 installer. Missing here relative to that tree are some changes to IDLE, IMHO those patches aren't appropriate for the 2.4 branch and users are better of using 2.5's IDLE.
author Ronald Oussoren <ronaldoussoren@mac.com>
date Sun, 08 Oct 2006 17:41:25 +0000
parents 78643be3cf40
children
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1 /* This code implemented by cvale@netcom.com */
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2
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3 #define INCL_DOSPROCESS
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4 #define INCL_DOSSEMAPHORES
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5 #include "os2.h"
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6 #include "limits.h"
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7
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8 #include "process.h"
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9
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10 #if defined(PYCC_GCC)
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11 #include <sys/builtin.h>
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12 #include <sys/fmutex.h>
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13 #else
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877d23bd5bdc Thanks to Chris Herborth, the thread primitives now have proper Py*
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14 long PyThread_get_thread_ident(void);
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15 #endif
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16
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17 #if !defined(THREAD_STACK_SIZE)
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18 #define THREAD_STACK_SIZE 0x10000
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19 #endif
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20
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21 /*
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22 * Initialization of the C package, should not be needed.
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23 */
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24 static void
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25 PyThread__init_thread(void)
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26 {
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27 }
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28
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29 /*
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30 * Thread support.
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31 */
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32 long
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33 PyThread_start_new_thread(void (*func)(void *), void *arg)
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34 {
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35 int thread_id;
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36
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37 thread_id = _beginthread(func, NULL, THREAD_STACK_SIZE, arg);
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38
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39 if (thread_id == -1) {
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40 dprintf(("_beginthread failed. return %ld\n", errno));
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41 }
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42
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43 return thread_id;
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44 }
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45
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46 long
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47 PyThread_get_thread_ident(void)
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48 {
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49 #if !defined(PYCC_GCC)
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50 PPIB pib;
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51 PTIB tib;
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52 #endif
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53
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54 if (!initialized)
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55 PyThread_init_thread();
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56
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57 #if defined(PYCC_GCC)
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58 return _gettid();
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59 #else
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60 DosGetInfoBlocks(&tib, &pib);
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61 return tib->tib_ptib2->tib2_ultid;
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62 #endif
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63 }
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64
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65 static void
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66 do_PyThread_exit_thread(int no_cleanup)
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67 {
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68 dprintf(("%ld: PyThread_exit_thread called\n",
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69 PyThread_get_thread_ident()));
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70 if (!initialized)
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71 if (no_cleanup)
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72 _exit(0);
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73 else
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74 exit(0);
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75 _endthread();
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76 }
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77
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78 void
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79 PyThread_exit_thread(void)
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80 {
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81 do_PyThread_exit_thread(0);
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82 }
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83
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84 void
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85 PyThread__exit_thread(void)
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86 {
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87 do_PyThread_exit_thread(1);
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88 }
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89
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90 #ifndef NO_EXIT_PROG
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91 static void
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92 do_PyThread_exit_prog(int status, int no_cleanup)
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93 {
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94 dprintf(("PyThread_exit_prog(%d) called\n", status));
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95 if (!initialized)
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96 if (no_cleanup)
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97 _exit(status);
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98 else
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99 exit(status);
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100 }
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101
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102 void
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103 PyThread_exit_prog(int status)
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104 {
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105 do_PyThread_exit_prog(status, 0);
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106 }
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107
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108 void
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109 PyThread__exit_prog(int status)
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110 {
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111 do_PyThread_exit_prog(status, 1);
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112 }
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113 #endif /* NO_EXIT_PROG */
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114
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115 /*
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116 * Lock support. This is implemented with an event semaphore and critical
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117 * sections to make it behave more like a posix mutex than its OS/2
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118 * counterparts.
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119 */
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120
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121 typedef struct os2_lock_t {
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122 int is_set;
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123 HEV changed;
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124 } *type_os2_lock;
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125
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126 PyThread_type_lock
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127 PyThread_allocate_lock(void)
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128 {
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129 #if defined(PYCC_GCC)
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130 _fmutex *sem = malloc(sizeof(_fmutex));
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131 if (!initialized)
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132 PyThread_init_thread();
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133 dprintf(("%ld: PyThread_allocate_lock() -> %lx\n",
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134 PyThread_get_thread_ident(),
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135 (long)sem));
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136 if (_fmutex_create(sem, 0)) {
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137 free(sem);
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138 sem = NULL;
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139 }
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140 return (PyThread_type_lock)sem;
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141 #else
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142 APIRET rc;
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143 type_os2_lock lock = (type_os2_lock)malloc(sizeof(struct os2_lock_t));
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144
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145 dprintf(("PyThread_allocate_lock called\n"));
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146 if (!initialized)
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147 PyThread_init_thread();
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148
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149 lock->is_set = 0;
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150
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151 DosCreateEventSem(NULL, &lock->changed, 0, 0);
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152
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153 dprintf(("%ld: PyThread_allocate_lock() -> %p\n",
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154 PyThread_get_thread_ident(),
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155 lock->changed));
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156
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157 return (PyThread_type_lock)lock;
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158 #endif
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159 }
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160
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161 void
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162 PyThread_free_lock(PyThread_type_lock aLock)
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163 {
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164 #if !defined(PYCC_GCC)
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165 type_os2_lock lock = (type_os2_lock)aLock;
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166 #endif
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167
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168 dprintf(("%ld: PyThread_free_lock(%p) called\n",
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169 PyThread_get_thread_ident(),aLock));
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170
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171 #if defined(PYCC_GCC)
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172 if (aLock) {
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173 _fmutex_close((_fmutex *)aLock);
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174 free((_fmutex *)aLock);
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175 }
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176 #else
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177 DosCloseEventSem(lock->changed);
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178 free(aLock);
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179 #endif
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180 }
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181
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182 /*
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183 * Return 1 on success if the lock was acquired
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184 *
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185 * and 0 if the lock was not acquired.
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186 */
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187 int
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188 PyThread_acquire_lock(PyThread_type_lock aLock, int waitflag)
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189 {
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190 #if !defined(PYCC_GCC)
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191 int done = 0;
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192 ULONG count;
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193 PID pid = 0;
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194 TID tid = 0;
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195 type_os2_lock lock = (type_os2_lock)aLock;
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196 #endif
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197
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198 dprintf(("%ld: PyThread_acquire_lock(%p, %d) called\n",
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199 PyThread_get_thread_ident(),
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200 aLock,
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201 waitflag));
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202
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203 #if defined(PYCC_GCC)
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204 /* always successful if the lock doesn't exist */
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205 if (aLock &&
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206 _fmutex_request((_fmutex *)aLock, waitflag ? 0 : _FMR_NOWAIT))
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207 return 0;
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208 #else
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209 while (!done) {
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210 /* if the lock is currently set, we have to wait for
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211 * the state to change
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212 */
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213 if (lock->is_set) {
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214 if (!waitflag)
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215 return 0;
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216 DosWaitEventSem(lock->changed, SEM_INDEFINITE_WAIT);
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217 }
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218
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219 /* enter a critical section and try to get the semaphore. If
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220 * it is still locked, we will try again.
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221 */
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222 if (DosEnterCritSec())
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223 return 0;
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224
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225 if (!lock->is_set) {
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226 lock->is_set = 1;
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227 DosResetEventSem(lock->changed, &count);
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228 done = 1;
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229 }
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230
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231 DosExitCritSec();
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232 }
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233 #endif
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234
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235 return 1;
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236 }
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237
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238 void PyThread_release_lock(PyThread_type_lock aLock)
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239 {
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240 #if !defined(PYCC_GCC)
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241 type_os2_lock lock = (type_os2_lock)aLock;
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242 #endif
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243
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244 dprintf(("%ld: PyThread_release_lock(%p) called\n",
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245 PyThread_get_thread_ident(),
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246 aLock));
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247
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248 #if defined(PYCC_GCC)
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249 if (aLock)
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250 _fmutex_release((_fmutex *)aLock);
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251 #else
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252 if (!lock->is_set) {
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253 dprintf(("%ld: Could not PyThread_release_lock(%p) error: %l\n",
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254 PyThread_get_thread_ident(),
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255 aLock,
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256 GetLastError()));
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257 return;
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258 }
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259
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260 if (DosEnterCritSec()) {
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261 dprintf(("%ld: Could not PyThread_release_lock(%p) error: %l\n",
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262 PyThread_get_thread_ident(),
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263 aLock,
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264 GetLastError()));
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265 return;
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266 }
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267
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268 lock->is_set = 0;
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269 DosPostEventSem(lock->changed);
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270
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271 DosExitCritSec();
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272 #endif
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273 }