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annotate Python/pystate.c @ 60129:6df6c19fbae3 legacy-trunk

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Issue #8276: PyEval_CallObject() is now only available in macro form. The function declaration, which was kept for backwards compatibility reasons, is now removed (the macro was introduced in 1997!).
author Antoine Pitrou <solipsis@pitrou.net>
date Thu, 01 Apr 2010 16:42:11 +0000
parents 7f500641c06a
children fd25030223b0
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1
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2 /* Thread and interpreter state structures and their interfaces */
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3
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4 #include "Python.h"
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5
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6 /* --------------------------------------------------------------------------
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7 CAUTION
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8
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9 Always use malloc() and free() directly in this file. A number of these
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10 functions are advertised as safe to call when the GIL isn't held, and in
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11 a debug build Python redirects (e.g.) PyMem_NEW (etc) to Python's debugging
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12 obmalloc functions. Those aren't thread-safe (they rely on the GIL to avoid
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13 the expense of doing their own locking).
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14 -------------------------------------------------------------------------- */
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15
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16 #ifdef HAVE_DLOPEN
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17 #ifdef HAVE_DLFCN_H
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18 #include <dlfcn.h>
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19 #endif
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20 #ifndef RTLD_LAZY
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21 #define RTLD_LAZY 1
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22 #endif
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23 #endif
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24
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25
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26 #ifdef WITH_THREAD
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27 #include "pythread.h"
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28 static PyThread_type_lock head_mutex = NULL; /* Protects interp->tstate_head */
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29 #define HEAD_INIT() (void)(head_mutex || (head_mutex = PyThread_allocate_lock()))
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30 #define HEAD_LOCK() PyThread_acquire_lock(head_mutex, WAIT_LOCK)
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31 #define HEAD_UNLOCK() PyThread_release_lock(head_mutex)
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32
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33 #ifdef __cplusplus
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34 extern "C" {
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35 #endif
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36
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37 /* The single PyInterpreterState used by this process'
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38 GILState implementation
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39 */
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40 static PyInterpreterState *autoInterpreterState = NULL;
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41 static int autoTLSkey = 0;
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42 #else
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43 #define HEAD_INIT() /* Nothing */
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44 #define HEAD_LOCK() /* Nothing */
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45 #define HEAD_UNLOCK() /* Nothing */
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46 #endif
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47
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48 static PyInterpreterState *interp_head = NULL;
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49
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50 PyThreadState *_PyThreadState_Current = NULL;
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51 PyThreadFrameGetter _PyThreadState_GetFrame = NULL;
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52
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53 #ifdef WITH_THREAD
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54 static void _PyGILState_NoteThreadState(PyThreadState* tstate);
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55 #endif
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56
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57
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58 PyInterpreterState *
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59 PyInterpreterState_New(void)
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60 {
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61 PyInterpreterState *interp = (PyInterpreterState *)
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62 malloc(sizeof(PyInterpreterState));
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63
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64 if (interp != NULL) {
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65 HEAD_INIT();
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66 #ifdef WITH_THREAD
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67 if (head_mutex == NULL)
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68 Py_FatalError("Can't initialize threads for interpreter");
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69 #endif
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70 interp->modules = NULL;
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71 interp->modules_reloading = NULL;
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72 interp->sysdict = NULL;
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73 interp->builtins = NULL;
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74 interp->tstate_head = NULL;
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75 interp->codec_search_path = NULL;
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76 interp->codec_search_cache = NULL;
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77 interp->codec_error_registry = NULL;
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78 #ifdef HAVE_DLOPEN
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79 #ifdef RTLD_NOW
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80 interp->dlopenflags = RTLD_NOW;
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81 #else
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82 interp->dlopenflags = RTLD_LAZY;
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83 #endif
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84 #endif
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85 #ifdef WITH_TSC
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86 interp->tscdump = 0;
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87 #endif
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88
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89 HEAD_LOCK();
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90 interp->next = interp_head;
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91 interp_head = interp;
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92 HEAD_UNLOCK();
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93 }
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94
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95 return interp;
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96 }
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97
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98
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99 void
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100 PyInterpreterState_Clear(PyInterpreterState *interp)
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101 {
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102 PyThreadState *p;
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103 HEAD_LOCK();
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104 for (p = interp->tstate_head; p != NULL; p = p->next)
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105 PyThreadState_Clear(p);
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106 HEAD_UNLOCK();
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107 Py_CLEAR(interp->codec_search_path);
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108 Py_CLEAR(interp->codec_search_cache);
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109 Py_CLEAR(interp->codec_error_registry);
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110 Py_CLEAR(interp->modules);
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111 Py_CLEAR(interp->modules_reloading);
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112 Py_CLEAR(interp->sysdict);
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113 Py_CLEAR(interp->builtins);
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114 }
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115
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116
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117 static void
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118 zapthreads(PyInterpreterState *interp)
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119 {
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120 PyThreadState *p;
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121 /* No need to lock the mutex here because this should only happen
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122 when the threads are all really dead (XXX famous last words). */
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123 while ((p = interp->tstate_head) != NULL) {
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124 PyThreadState_Delete(p);
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125 }
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126 }
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127
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128
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129 void
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130 PyInterpreterState_Delete(PyInterpreterState *interp)
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131 {
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132 PyInterpreterState **p;
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133 zapthreads(interp);
14378
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134 HEAD_LOCK();
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135 for (p = &interp_head; ; p = &(*p)->next) {
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136 if (*p == NULL)
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137 Py_FatalError(
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138 "PyInterpreterState_Delete: invalid interp");
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139 if (*p == interp)
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diff changeset
140 break;
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141 }
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142 if (interp->tstate_head != NULL)
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143 Py_FatalError("PyInterpreterState_Delete: remaining threads");
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144 *p = interp->next;
14378
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145 HEAD_UNLOCK();
33713
517e4ec0df89 PyInterpreterState_New(), PyThreadState_New(): use malloc/free directly.
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146 free(interp);
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147 }
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148
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149
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150 /* Default implementation for _PyThreadState_GetFrame */
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parents: 25111
diff changeset
151 static struct _frame *
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152 threadstate_getframe(PyThreadState *self)
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diff changeset
153 {
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154 return self->frame;
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155 }
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Michael W. Hudson <mwh@python.net>
parents: 25111
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156
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157 static PyThreadState *
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158 new_threadstate(PyInterpreterState *interp, int init)
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159 {
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160 PyThreadState *tstate = (PyThreadState *)malloc(sizeof(PyThreadState));
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161
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162 if (_PyThreadState_GetFrame == NULL)
27978
4b99a701defe - PyEval_GetFrame() is now declared to return a PyFrameObject *
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163 _PyThreadState_GetFrame = threadstate_getframe;
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164
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165 if (tstate != NULL) {
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166 tstate->interp = interp;
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167
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168 tstate->frame = NULL;
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169 tstate->recursion_depth = 0;
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170 tstate->tracing = 0;
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171 tstate->use_tracing = 0;
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172 tstate->tick_counter = 0;
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a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
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parents: 28616
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173 tstate->gilstate_counter = 0;
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174 tstate->async_exc = NULL;
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014cc362aa91 Initialize thread_id to 0 in unthreaded build. Fixes #770247.
Martin v. Löwis <martin@v.loewis.de>
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175 #ifdef WITH_THREAD
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176 tstate->thread_id = PyThread_get_thread_ident();
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177 #else
014cc362aa91 Initialize thread_id to 0 in unthreaded build. Fixes #770247.
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178 tstate->thread_id = 0;
014cc362aa91 Initialize thread_id to 0 in unthreaded build. Fixes #770247.
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diff changeset
179 #endif
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180
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181 tstate->dict = NULL;
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182
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183 tstate->curexc_type = NULL;
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184 tstate->curexc_value = NULL;
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185 tstate->curexc_traceback = NULL;
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186
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187 tstate->exc_type = NULL;
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188 tstate->exc_value = NULL;
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189 tstate->exc_traceback = NULL;
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190
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191 tstate->c_profilefunc = NULL;
e427afb5637f Revise the interface to the profiling and tracing support for the
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192 tstate->c_tracefunc = NULL;
e427afb5637f Revise the interface to the profiling and tracing support for the
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193 tstate->c_profileobj = NULL;
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194 tstate->c_traceobj = NULL;
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195
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diff changeset
196 if (init)
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197 _PyThreadState_Init(tstate);
35117
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198
11011
3b3c7b8ade7f CRITICAL PATCH!
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199 HEAD_LOCK();
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200 tstate->next = interp->tstate_head;
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201 interp->tstate_head = tstate;
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202 HEAD_UNLOCK();
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203 }
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204
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205 return tstate;
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diff changeset
206 }
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207
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diff changeset
208 PyThreadState *
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diff changeset
209 PyThreadState_New(PyInterpreterState *interp)
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diff changeset
210 {
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diff changeset
211 return new_threadstate(interp, 1);
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diff changeset
212 }
7f500641c06a Issue #7544: Preallocate thread memory before creating the thread to avoid a
Victor Stinner <victor.stinner@haypocalc.com>
parents: 48167
diff changeset
213
7f500641c06a Issue #7544: Preallocate thread memory before creating the thread to avoid a
Victor Stinner <victor.stinner@haypocalc.com>
parents: 48167
diff changeset
214 PyThreadState *
7f500641c06a Issue #7544: Preallocate thread memory before creating the thread to avoid a
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diff changeset
215 _PyThreadState_Prealloc(PyInterpreterState *interp)
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diff changeset
216 {
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diff changeset
217 return new_threadstate(interp, 0);
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Victor Stinner <victor.stinner@haypocalc.com>
parents: 48167
diff changeset
218 }
7f500641c06a Issue #7544: Preallocate thread memory before creating the thread to avoid a
Victor Stinner <victor.stinner@haypocalc.com>
parents: 48167
diff changeset
219
7f500641c06a Issue #7544: Preallocate thread memory before creating the thread to avoid a
Victor Stinner <victor.stinner@haypocalc.com>
parents: 48167
diff changeset
220 void
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diff changeset
221 _PyThreadState_Init(PyThreadState *tstate)
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Victor Stinner <victor.stinner@haypocalc.com>
parents: 48167
diff changeset
222 {
7f500641c06a Issue #7544: Preallocate thread memory before creating the thread to avoid a
Victor Stinner <victor.stinner@haypocalc.com>
parents: 48167
diff changeset
223 #ifdef WITH_THREAD
7f500641c06a Issue #7544: Preallocate thread memory before creating the thread to avoid a
Victor Stinner <victor.stinner@haypocalc.com>
parents: 48167
diff changeset
224 _PyGILState_NoteThreadState(tstate);
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Victor Stinner <victor.stinner@haypocalc.com>
parents: 48167
diff changeset
225 #endif
7f500641c06a Issue #7544: Preallocate thread memory before creating the thread to avoid a
Victor Stinner <victor.stinner@haypocalc.com>
parents: 48167
diff changeset
226 }
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227
5926
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diff changeset
228 void
13658
f79434ee41fa Mass ANSIfication of function definitions. Doesn't cover all 'extern'
Thomas Wouters <thomas@python.org>
parents: 13256
diff changeset
229 PyThreadState_Clear(PyThreadState *tstate)
5926
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diff changeset
230 {
6549
a8e3b2e9f5d2 The warning about thread still having a frame now only happens in
Guido van Rossum <guido@python.org>
parents: 6124
diff changeset
231 if (Py_VerboseFlag && tstate->frame != NULL)
5926
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diff changeset
232 fprintf(stderr,
6124
cc2c84769636 Added missing newline to warning msg
Guido van Rossum <guido@python.org>
parents: 5926
diff changeset
233 "PyThreadState_Clear: warning: thread still has a frame\n");
5926
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diff changeset
234
37752
7f72791f0aec Zap ZAP.
Martin v. Löwis <martin@v.loewis.de>
parents: 37655
diff changeset
235 Py_CLEAR(tstate->frame);
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diff changeset
236
37752
7f72791f0aec Zap ZAP.
Martin v. Löwis <martin@v.loewis.de>
parents: 37655
diff changeset
237 Py_CLEAR(tstate->dict);
7f72791f0aec Zap ZAP.
Martin v. Löwis <martin@v.loewis.de>
parents: 37655
diff changeset
238 Py_CLEAR(tstate->async_exc);
7970
4ceee1ef99b0 /* An extension mechanism to store arbitrary additional per-thread state.
Guido van Rossum <guido@python.org>
parents: 6549
diff changeset
239
37752
7f72791f0aec Zap ZAP.
Martin v. Löwis <martin@v.loewis.de>
parents: 37655
diff changeset
240 Py_CLEAR(tstate->curexc_type);
7f72791f0aec Zap ZAP.
Martin v. Löwis <martin@v.loewis.de>
parents: 37655
diff changeset
241 Py_CLEAR(tstate->curexc_value);
7f72791f0aec Zap ZAP.
Martin v. Löwis <martin@v.loewis.de>
parents: 37655
diff changeset
242 Py_CLEAR(tstate->curexc_traceback);
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diff changeset
243
37752
7f72791f0aec Zap ZAP.
Martin v. Löwis <martin@v.loewis.de>
parents: 37655
diff changeset
244 Py_CLEAR(tstate->exc_type);
7f72791f0aec Zap ZAP.
Martin v. Löwis <martin@v.loewis.de>
parents: 37655
diff changeset
245 Py_CLEAR(tstate->exc_value);
7f72791f0aec Zap ZAP.
Martin v. Löwis <martin@v.loewis.de>
parents: 37655
diff changeset
246 Py_CLEAR(tstate->exc_traceback);
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diff changeset
247
18326
e427afb5637f Revise the interface to the profiling and tracing support for the
Fred Drake <fdrake@acm.org>
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diff changeset
248 tstate->c_profilefunc = NULL;
e427afb5637f Revise the interface to the profiling and tracing support for the
Fred Drake <fdrake@acm.org>
parents: 16139
diff changeset
249 tstate->c_tracefunc = NULL;
37752
7f72791f0aec Zap ZAP.
Martin v. Löwis <martin@v.loewis.de>
parents: 37655
diff changeset
250 Py_CLEAR(tstate->c_profileobj);
7f72791f0aec Zap ZAP.
Martin v. Löwis <martin@v.loewis.de>
parents: 37655
diff changeset
251 Py_CLEAR(tstate->c_traceobj);
5405
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parents:
diff changeset
252 }
b7871ca930ad Massive changes for separate thread state management.
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parents:
diff changeset
253
b7871ca930ad Massive changes for separate thread state management.
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parents:
diff changeset
254
16139
d96ce9708c00 Add a new API, PyThreadState_DeleteCurrent() that combines
Guido van Rossum <guido@python.org>
parents: 14378
diff changeset
255 /* Common code for PyThreadState_Delete() and PyThreadState_DeleteCurrent() */
d96ce9708c00 Add a new API, PyThreadState_DeleteCurrent() that combines
Guido van Rossum <guido@python.org>
parents: 14378
diff changeset
256 static void
d96ce9708c00 Add a new API, PyThreadState_DeleteCurrent() that combines
Guido van Rossum <guido@python.org>
parents: 14378
diff changeset
257 tstate_delete_common(PyThreadState *tstate)
5405
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parents:
diff changeset
258 {
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diff changeset
259 PyInterpreterState *interp;
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diff changeset
260 PyThreadState **p;
44832
eb2eafda29b7 Provide a sanity check during PyThreadState_DeleteCurrent() and
Gregory P. Smith <greg@mad-scientist.com>
parents: 41128
diff changeset
261 PyThreadState *prev_p = NULL;
5926
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diff changeset
262 if (tstate == NULL)
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diff changeset
263 Py_FatalError("PyThreadState_Delete: NULL tstate");
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diff changeset
264 interp = tstate->interp;
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parents: 5849
diff changeset
265 if (interp == NULL)
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266 Py_FatalError("PyThreadState_Delete: NULL interp");
11011
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parents: 9667
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267 HEAD_LOCK();
5926
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diff changeset
268 for (p = &interp->tstate_head; ; p = &(*p)->next) {
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diff changeset
269 if (*p == NULL)
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diff changeset
270 Py_FatalError(
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271 "PyThreadState_Delete: invalid tstate");
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272 if (*p == tstate)
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273 break;
48167
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Gregory P. Smith <greg@mad-scientist.com>
parents: 44832
diff changeset
274 /* Sanity check. These states should never happen but if
a8a8232cb541 Adds a sanity check to avoid a *very rare* infinite loop due to a corrupt tls
Gregory P. Smith <greg@mad-scientist.com>
parents: 44832
diff changeset
275 * they do we must abort. Otherwise we'll end up spinning in
a8a8232cb541 Adds a sanity check to avoid a *very rare* infinite loop due to a corrupt tls
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parents: 44832
diff changeset
276 * in a tight loop with the lock held. A similar check is done
a8a8232cb541 Adds a sanity check to avoid a *very rare* infinite loop due to a corrupt tls
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parents: 44832
diff changeset
277 * in thread.c find_key(). */
44832
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Gregory P. Smith <greg@mad-scientist.com>
parents: 41128
diff changeset
278 if (*p == prev_p)
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Gregory P. Smith <greg@mad-scientist.com>
parents: 41128
diff changeset
279 Py_FatalError(
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parents: 41128
diff changeset
280 "PyThreadState_Delete: small circular list(!)"
eb2eafda29b7 Provide a sanity check during PyThreadState_DeleteCurrent() and
Gregory P. Smith <greg@mad-scientist.com>
parents: 41128
diff changeset
281 " and tstate not found.");
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Gregory P. Smith <greg@mad-scientist.com>
parents: 41128
diff changeset
282 prev_p = *p;
eb2eafda29b7 Provide a sanity check during PyThreadState_DeleteCurrent() and
Gregory P. Smith <greg@mad-scientist.com>
parents: 41128
diff changeset
283 if ((*p)->next == interp->tstate_head)
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Gregory P. Smith <greg@mad-scientist.com>
parents: 41128
diff changeset
284 Py_FatalError(
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Gregory P. Smith <greg@mad-scientist.com>
parents: 41128
diff changeset
285 "PyThreadState_Delete: circular list(!) and"
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parents: 41128
diff changeset
286 " tstate not found.");
5926
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287 }
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parents: 5849
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288 *p = tstate->next;
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289 HEAD_UNLOCK();
33713
517e4ec0df89 PyInterpreterState_New(), PyThreadState_New(): use malloc/free directly.
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parents: 33711
diff changeset
290 free(tstate);
5405
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parents:
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291 }
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parents:
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292
b7871ca930ad Massive changes for separate thread state management.
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parents:
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293
16139
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Guido van Rossum <guido@python.org>
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diff changeset
294 void
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diff changeset
295 PyThreadState_Delete(PyThreadState *tstate)
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diff changeset
296 {
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Guido van Rossum <guido@python.org>
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diff changeset
297 if (tstate == _PyThreadState_Current)
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298 Py_FatalError("PyThreadState_Delete: tstate is still current");
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299 tstate_delete_common(tstate);
36683
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Tim Peters <tim.peters@gmail.com>
parents: 35661
diff changeset
300 #ifdef WITH_THREAD
da2a1049215d Patch 1413181, by Gabriel Becedillas.
Tim Peters <tim.peters@gmail.com>
parents: 35661
diff changeset
301 if (autoTLSkey && PyThread_get_key_value(autoTLSkey) == tstate)
da2a1049215d Patch 1413181, by Gabriel Becedillas.
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parents: 35661
diff changeset
302 PyThread_delete_key_value(autoTLSkey);
da2a1049215d Patch 1413181, by Gabriel Becedillas.
Tim Peters <tim.peters@gmail.com>
parents: 35661
diff changeset
303 #endif /* WITH_THREAD */
16139
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diff changeset
304 }
d96ce9708c00 Add a new API, PyThreadState_DeleteCurrent() that combines
Guido van Rossum <guido@python.org>
parents: 14378
diff changeset
305
d96ce9708c00 Add a new API, PyThreadState_DeleteCurrent() that combines
Guido van Rossum <guido@python.org>
parents: 14378
diff changeset
306
d96ce9708c00 Add a new API, PyThreadState_DeleteCurrent() that combines
Guido van Rossum <guido@python.org>
parents: 14378
diff changeset
307 #ifdef WITH_THREAD
d96ce9708c00 Add a new API, PyThreadState_DeleteCurrent() that combines
Guido van Rossum <guido@python.org>
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diff changeset
308 void
d96ce9708c00 Add a new API, PyThreadState_DeleteCurrent() that combines
Guido van Rossum <guido@python.org>
parents: 14378
diff changeset
309 PyThreadState_DeleteCurrent()
d96ce9708c00 Add a new API, PyThreadState_DeleteCurrent() that combines
Guido van Rossum <guido@python.org>
parents: 14378
diff changeset
310 {
d96ce9708c00 Add a new API, PyThreadState_DeleteCurrent() that combines
Guido van Rossum <guido@python.org>
parents: 14378
diff changeset
311 PyThreadState *tstate = _PyThreadState_Current;
d96ce9708c00 Add a new API, PyThreadState_DeleteCurrent() that combines
Guido van Rossum <guido@python.org>
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diff changeset
312 if (tstate == NULL)
d96ce9708c00 Add a new API, PyThreadState_DeleteCurrent() that combines
Guido van Rossum <guido@python.org>
parents: 14378
diff changeset
313 Py_FatalError(
d96ce9708c00 Add a new API, PyThreadState_DeleteCurrent() that combines
Guido van Rossum <guido@python.org>
parents: 14378
diff changeset
314 "PyThreadState_DeleteCurrent: no current tstate");
d96ce9708c00 Add a new API, PyThreadState_DeleteCurrent() that combines
Guido van Rossum <guido@python.org>
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diff changeset
315 _PyThreadState_Current = NULL;
d96ce9708c00 Add a new API, PyThreadState_DeleteCurrent() that combines
Guido van Rossum <guido@python.org>
parents: 14378
diff changeset
316 tstate_delete_common(tstate);
35117
7ea2be2c0e1d Fix bug:
Michael W. Hudson <mwh@python.net>
parents: 35095
diff changeset
317 if (autoTLSkey && PyThread_get_key_value(autoTLSkey) == tstate)
7ea2be2c0e1d Fix bug:
Michael W. Hudson <mwh@python.net>
parents: 35095
diff changeset
318 PyThread_delete_key_value(autoTLSkey);
16139
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Guido van Rossum <guido@python.org>
parents: 14378
diff changeset
319 PyEval_ReleaseLock();
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Guido van Rossum <guido@python.org>
parents: 14378
diff changeset
320 }
d96ce9708c00 Add a new API, PyThreadState_DeleteCurrent() that combines
Guido van Rossum <guido@python.org>
parents: 14378
diff changeset
321 #endif /* WITH_THREAD */
d96ce9708c00 Add a new API, PyThreadState_DeleteCurrent() that combines
Guido van Rossum <guido@python.org>
parents: 14378
diff changeset
322
d96ce9708c00 Add a new API, PyThreadState_DeleteCurrent() that combines
Guido van Rossum <guido@python.org>
parents: 14378
diff changeset
323
5405
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Guido van Rossum <guido@python.org>
parents:
diff changeset
324 PyThreadState *
13658
f79434ee41fa Mass ANSIfication of function definitions. Doesn't cover all 'extern'
Thomas Wouters <thomas@python.org>
parents: 13256
diff changeset
325 PyThreadState_Get(void)
5405
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
326 {
9667
914f83e7fa0a Make current_tstate a global, _PyThreadState_Current. This is to
Guido van Rossum <guido@python.org>
parents: 7970
diff changeset
327 if (_PyThreadState_Current == NULL)
5926
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diff changeset
328 Py_FatalError("PyThreadState_Get: no current thread");
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diff changeset
329
9667
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Guido van Rossum <guido@python.org>
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330 return _PyThreadState_Current;
5405
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parents:
diff changeset
331 }
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
332
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
333
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
334 PyThreadState *
37606
f448d0075691 more low-hanging fruit to make code compile under a C++ compiler. Not
Anthony Baxter <anthonybaxter@gmail.com>
parents: 36683
diff changeset
335 PyThreadState_Swap(PyThreadState *newts)
5405
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Guido van Rossum <guido@python.org>
parents:
diff changeset
336 {
37606
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diff changeset
337 PyThreadState *oldts = _PyThreadState_Current;
5926
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parents: 5849
diff changeset
338
37606
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diff changeset
339 _PyThreadState_Current = newts;
28694
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
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parents: 28616
diff changeset
340 /* It should not be possible for more than one thread state
33698
090ffcb83f0a Trim trailing whitespace.
Tim Peters <tim.peters@gmail.com>
parents: 32301
diff changeset
341 to be used for a thread. Check this the best we can in debug
28694
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
342 builds.
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
343 */
28914
33475661823d Patch #729300: Disable error message if Python is not built for threads.
Martin v. Löwis <martin@v.loewis.de>
parents: 28694
diff changeset
344 #if defined(Py_DEBUG) && defined(WITH_THREAD)
37606
f448d0075691 more low-hanging fruit to make code compile under a C++ compiler. Not
Anthony Baxter <anthonybaxter@gmail.com>
parents: 36683
diff changeset
345 if (newts) {
39830
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Georg Brandl <georg@python.org>
parents: 39431
diff changeset
346 /* This can be called from PyEval_RestoreThread(). Similar
0bac40e4d0c6 Forward-port of rev. 51857:
Georg Brandl <georg@python.org>
parents: 39431
diff changeset
347 to it, we need to ensure errno doesn't change.
0bac40e4d0c6 Forward-port of rev. 51857:
Georg Brandl <georg@python.org>
parents: 39431
diff changeset
348 */
0bac40e4d0c6 Forward-port of rev. 51857:
Georg Brandl <georg@python.org>
parents: 39431
diff changeset
349 int err = errno;
28694
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
350 PyThreadState *check = PyGILState_GetThisThreadState();
37606
f448d0075691 more low-hanging fruit to make code compile under a C++ compiler. Not
Anthony Baxter <anthonybaxter@gmail.com>
parents: 36683
diff changeset
351 if (check && check->interp == newts->interp && check != newts)
28694
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
352 Py_FatalError("Invalid thread state for this thread");
39830
0bac40e4d0c6 Forward-port of rev. 51857:
Georg Brandl <georg@python.org>
parents: 39431
diff changeset
353 errno = err;
28694
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
354 }
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
355 #endif
37606
f448d0075691 more low-hanging fruit to make code compile under a C++ compiler. Not
Anthony Baxter <anthonybaxter@gmail.com>
parents: 36683
diff changeset
356 return oldts;
5405
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
357 }
7970
4ceee1ef99b0 /* An extension mechanism to store arbitrary additional per-thread state.
Guido van Rossum <guido@python.org>
parents: 6549
diff changeset
358
4ceee1ef99b0 /* An extension mechanism to store arbitrary additional per-thread state.
Guido van Rossum <guido@python.org>
parents: 6549
diff changeset
359 /* An extension mechanism to store arbitrary additional per-thread state.
4ceee1ef99b0 /* An extension mechanism to store arbitrary additional per-thread state.
Guido van Rossum <guido@python.org>
parents: 6549
diff changeset
360 PyThreadState_GetDict() returns a dictionary that can be used to hold such
4ceee1ef99b0 /* An extension mechanism to store arbitrary additional per-thread state.
Guido van Rossum <guido@python.org>
parents: 6549
diff changeset
361 state; the caller should pick a unique key and store its state there. If
28616
4f0b7acffc7d - pythunrun.c, Py_Finalize(): move the call to _Py_PrintReferences()
Guido van Rossum <guido@python.org>
parents: 28325
diff changeset
362 PyThreadState_GetDict() returns NULL, an exception has *not* been raised
4f0b7acffc7d - pythunrun.c, Py_Finalize(): move the call to _Py_PrintReferences()
Guido van Rossum <guido@python.org>
parents: 28325
diff changeset
363 and the caller should assume no per-thread state is available. */
7970
4ceee1ef99b0 /* An extension mechanism to store arbitrary additional per-thread state.
Guido van Rossum <guido@python.org>
parents: 6549
diff changeset
364
4ceee1ef99b0 /* An extension mechanism to store arbitrary additional per-thread state.
Guido van Rossum <guido@python.org>
parents: 6549
diff changeset
365 PyObject *
13658
f79434ee41fa Mass ANSIfication of function definitions. Doesn't cover all 'extern'
Thomas Wouters <thomas@python.org>
parents: 13256
diff changeset
366 PyThreadState_GetDict(void)
7970
4ceee1ef99b0 /* An extension mechanism to store arbitrary additional per-thread state.
Guido van Rossum <guido@python.org>
parents: 6549
diff changeset
367 {
9667
914f83e7fa0a Make current_tstate a global, _PyThreadState_Current. This is to
Guido van Rossum <guido@python.org>
parents: 7970
diff changeset
368 if (_PyThreadState_Current == NULL)
28616
4f0b7acffc7d - pythunrun.c, Py_Finalize(): move the call to _Py_PrintReferences()
Guido van Rossum <guido@python.org>
parents: 28325
diff changeset
369 return NULL;
7970
4ceee1ef99b0 /* An extension mechanism to store arbitrary additional per-thread state.
Guido van Rossum <guido@python.org>
parents: 6549
diff changeset
370
28616
4f0b7acffc7d - pythunrun.c, Py_Finalize(): move the call to _Py_PrintReferences()
Guido van Rossum <guido@python.org>
parents: 28325
diff changeset
371 if (_PyThreadState_Current->dict == NULL) {
4f0b7acffc7d - pythunrun.c, Py_Finalize(): move the call to _Py_PrintReferences()
Guido van Rossum <guido@python.org>
parents: 28325
diff changeset
372 PyObject *d;
4f0b7acffc7d - pythunrun.c, Py_Finalize(): move the call to _Py_PrintReferences()
Guido van Rossum <guido@python.org>
parents: 28325
diff changeset
373 _PyThreadState_Current->dict = d = PyDict_New();
4f0b7acffc7d - pythunrun.c, Py_Finalize(): move the call to _Py_PrintReferences()
Guido van Rossum <guido@python.org>
parents: 28325
diff changeset
374 if (d == NULL)
4f0b7acffc7d - pythunrun.c, Py_Finalize(): move the call to _Py_PrintReferences()
Guido van Rossum <guido@python.org>
parents: 28325
diff changeset
375 PyErr_Clear();
4f0b7acffc7d - pythunrun.c, Py_Finalize(): move the call to _Py_PrintReferences()
Guido van Rossum <guido@python.org>
parents: 28325
diff changeset
376 }
9667
914f83e7fa0a Make current_tstate a global, _PyThreadState_Current. This is to
Guido van Rossum <guido@python.org>
parents: 7970
diff changeset
377 return _PyThreadState_Current->dict;
7970
4ceee1ef99b0 /* An extension mechanism to store arbitrary additional per-thread state.
Guido van Rossum <guido@python.org>
parents: 6549
diff changeset
378 }
18733
b0329649b8cf Add a low-level API to access interpreters, for David Beazley.
Guido van Rossum <guido@python.org>
parents: 18689
diff changeset
379
b0329649b8cf Add a low-level API to access interpreters, for David Beazley.
Guido van Rossum <guido@python.org>
parents: 18689
diff changeset
380
29643
fa97293533a9 Add PyThreadState_SetAsyncExc(long, PyObject *).
Guido van Rossum <guido@python.org>
parents: 28914
diff changeset
381 /* Asynchronously raise an exception in a thread.
fa97293533a9 Add PyThreadState_SetAsyncExc(long, PyObject *).
Guido van Rossum <guido@python.org>
parents: 28914
diff changeset
382 Requested by Just van Rossum and Alex Martelli.
34568
ff3ca656c281 Backport 2.39:
Guido van Rossum <guido@python.org>
parents: 33940
diff changeset
383 To prevent naive misuse, you must write your own extension
39431
de9e1a5dca93 Followup to bug #1069160.
Tim Peters <tim.peters@gmail.com>
parents: 39129
diff changeset
384 to call this, or use ctypes. Must be called with the GIL held.
de9e1a5dca93 Followup to bug #1069160.
Tim Peters <tim.peters@gmail.com>
parents: 39129
diff changeset
385 Returns the number of tstates modified (normally 1, but 0 if `id` didn't
de9e1a5dca93 Followup to bug #1069160.
Tim Peters <tim.peters@gmail.com>
parents: 39129
diff changeset
386 match any known thread id). Can be called with exc=NULL to clear an
de9e1a5dca93 Followup to bug #1069160.
Tim Peters <tim.peters@gmail.com>
parents: 39129
diff changeset
387 existing async exception. This raises no exceptions. */
29643
fa97293533a9 Add PyThreadState_SetAsyncExc(long, PyObject *).
Guido van Rossum <guido@python.org>
parents: 28914
diff changeset
388
fa97293533a9 Add PyThreadState_SetAsyncExc(long, PyObject *).
Guido van Rossum <guido@python.org>
parents: 28914
diff changeset
389 int
fa97293533a9 Add PyThreadState_SetAsyncExc(long, PyObject *).
Guido van Rossum <guido@python.org>
parents: 28914
diff changeset
390 PyThreadState_SetAsyncExc(long id, PyObject *exc) {
31797
846b3ee7e106 Changed random calls to PyThreadState_Get() to use the macro
Nicholas Bastin <nick.bastin@gmail.com>
parents: 29842
diff changeset
391 PyThreadState *tstate = PyThreadState_GET();
29643
fa97293533a9 Add PyThreadState_SetAsyncExc(long, PyObject *).
Guido van Rossum <guido@python.org>
parents: 28914
diff changeset
392 PyInterpreterState *interp = tstate->interp;
fa97293533a9 Add PyThreadState_SetAsyncExc(long, PyObject *).
Guido van Rossum <guido@python.org>
parents: 28914
diff changeset
393 PyThreadState *p;
39431
de9e1a5dca93 Followup to bug #1069160.
Tim Peters <tim.peters@gmail.com>
parents: 39129
diff changeset
394
de9e1a5dca93 Followup to bug #1069160.
Tim Peters <tim.peters@gmail.com>
parents: 39129
diff changeset
395 /* Although the GIL is held, a few C API functions can be called
de9e1a5dca93 Followup to bug #1069160.
Tim Peters <tim.peters@gmail.com>
parents: 39129
diff changeset
396 * without the GIL held, and in particular some that create and
de9e1a5dca93 Followup to bug #1069160.
Tim Peters <tim.peters@gmail.com>
parents: 39129
diff changeset
397 * destroy thread and interpreter states. Those can mutate the
de9e1a5dca93 Followup to bug #1069160.
Tim Peters <tim.peters@gmail.com>
parents: 39129
diff changeset
398 * list of thread states we're traversing, so to prevent that we lock
de9e1a5dca93 Followup to bug #1069160.
Tim Peters <tim.peters@gmail.com>
parents: 39129
diff changeset
399 * head_mutex for the duration.
de9e1a5dca93 Followup to bug #1069160.
Tim Peters <tim.peters@gmail.com>
parents: 39129
diff changeset
400 */
34568
ff3ca656c281 Backport 2.39:
Guido van Rossum <guido@python.org>
parents: 33940
diff changeset
401 HEAD_LOCK();
29643
fa97293533a9 Add PyThreadState_SetAsyncExc(long, PyObject *).
Guido van Rossum <guido@python.org>
parents: 28914
diff changeset
402 for (p = interp->tstate_head; p != NULL; p = p->next) {
39431
de9e1a5dca93 Followup to bug #1069160.
Tim Peters <tim.peters@gmail.com>
parents: 39129
diff changeset
403 if (p->thread_id == id) {
de9e1a5dca93 Followup to bug #1069160.
Tim Peters <tim.peters@gmail.com>
parents: 39129
diff changeset
404 /* Tricky: we need to decref the current value
de9e1a5dca93 Followup to bug #1069160.
Tim Peters <tim.peters@gmail.com>
parents: 39129
diff changeset
405 * (if any) in p->async_exc, but that can in turn
de9e1a5dca93 Followup to bug #1069160.
Tim Peters <tim.peters@gmail.com>
parents: 39129
diff changeset
406 * allow arbitrary Python code to run, including
de9e1a5dca93 Followup to bug #1069160.
Tim Peters <tim.peters@gmail.com>
parents: 39129
diff changeset
407 * perhaps calls to this function. To prevent
de9e1a5dca93 Followup to bug #1069160.
Tim Peters <tim.peters@gmail.com>
parents: 39129
diff changeset
408 * deadlock, we need to release head_mutex before
de9e1a5dca93 Followup to bug #1069160.
Tim Peters <tim.peters@gmail.com>
parents: 39129
diff changeset
409 * the decref.
de9e1a5dca93 Followup to bug #1069160.
Tim Peters <tim.peters@gmail.com>
parents: 39129
diff changeset
410 */
de9e1a5dca93 Followup to bug #1069160.
Tim Peters <tim.peters@gmail.com>
parents: 39129
diff changeset
411 PyObject *old_exc = p->async_exc;
de9e1a5dca93 Followup to bug #1069160.
Tim Peters <tim.peters@gmail.com>
parents: 39129
diff changeset
412 Py_XINCREF(exc);
de9e1a5dca93 Followup to bug #1069160.
Tim Peters <tim.peters@gmail.com>
parents: 39129
diff changeset
413 p->async_exc = exc;
de9e1a5dca93 Followup to bug #1069160.
Tim Peters <tim.peters@gmail.com>
parents: 39129
diff changeset
414 HEAD_UNLOCK();
de9e1a5dca93 Followup to bug #1069160.
Tim Peters <tim.peters@gmail.com>
parents: 39129
diff changeset
415 Py_XDECREF(old_exc);
de9e1a5dca93 Followup to bug #1069160.
Tim Peters <tim.peters@gmail.com>
parents: 39129
diff changeset
416 return 1;
de9e1a5dca93 Followup to bug #1069160.
Tim Peters <tim.peters@gmail.com>
parents: 39129
diff changeset
417 }
29643
fa97293533a9 Add PyThreadState_SetAsyncExc(long, PyObject *).
Guido van Rossum <guido@python.org>
parents: 28914
diff changeset
418 }
34568
ff3ca656c281 Backport 2.39:
Guido van Rossum <guido@python.org>
parents: 33940
diff changeset
419 HEAD_UNLOCK();
39431
de9e1a5dca93 Followup to bug #1069160.
Tim Peters <tim.peters@gmail.com>
parents: 39129
diff changeset
420 return 0;
29643
fa97293533a9 Add PyThreadState_SetAsyncExc(long, PyObject *).
Guido van Rossum <guido@python.org>
parents: 28914
diff changeset
421 }
fa97293533a9 Add PyThreadState_SetAsyncExc(long, PyObject *).
Guido van Rossum <guido@python.org>
parents: 28914
diff changeset
422
fa97293533a9 Add PyThreadState_SetAsyncExc(long, PyObject *).
Guido van Rossum <guido@python.org>
parents: 28914
diff changeset
423
18733
b0329649b8cf Add a low-level API to access interpreters, for David Beazley.
Guido van Rossum <guido@python.org>
parents: 18689
diff changeset
424 /* Routines for advanced debuggers, requested by David Beazley.
b0329649b8cf Add a low-level API to access interpreters, for David Beazley.
Guido van Rossum <guido@python.org>
parents: 18689
diff changeset
425 Don't use unless you know what you are doing! */
b0329649b8cf Add a low-level API to access interpreters, for David Beazley.
Guido van Rossum <guido@python.org>
parents: 18689
diff changeset
426
b0329649b8cf Add a low-level API to access interpreters, for David Beazley.
Guido van Rossum <guido@python.org>
parents: 18689
diff changeset
427 PyInterpreterState *
b0329649b8cf Add a low-level API to access interpreters, for David Beazley.
Guido van Rossum <guido@python.org>
parents: 18689
diff changeset
428 PyInterpreterState_Head(void)
b0329649b8cf Add a low-level API to access interpreters, for David Beazley.
Guido van Rossum <guido@python.org>
parents: 18689
diff changeset
429 {
b0329649b8cf Add a low-level API to access interpreters, for David Beazley.
Guido van Rossum <guido@python.org>
parents: 18689
diff changeset
430 return interp_head;
b0329649b8cf Add a low-level API to access interpreters, for David Beazley.
Guido van Rossum <guido@python.org>
parents: 18689
diff changeset
431 }
b0329649b8cf Add a low-level API to access interpreters, for David Beazley.
Guido van Rossum <guido@python.org>
parents: 18689
diff changeset
432
b0329649b8cf Add a low-level API to access interpreters, for David Beazley.
Guido van Rossum <guido@python.org>
parents: 18689
diff changeset
433 PyInterpreterState *
b0329649b8cf Add a low-level API to access interpreters, for David Beazley.
Guido van Rossum <guido@python.org>
parents: 18689
diff changeset
434 PyInterpreterState_Next(PyInterpreterState *interp) {
b0329649b8cf Add a low-level API to access interpreters, for David Beazley.
Guido van Rossum <guido@python.org>
parents: 18689
diff changeset
435 return interp->next;
b0329649b8cf Add a low-level API to access interpreters, for David Beazley.
Guido van Rossum <guido@python.org>
parents: 18689
diff changeset
436 }
b0329649b8cf Add a low-level API to access interpreters, for David Beazley.
Guido van Rossum <guido@python.org>
parents: 18689
diff changeset
437
b0329649b8cf Add a low-level API to access interpreters, for David Beazley.
Guido van Rossum <guido@python.org>
parents: 18689
diff changeset
438 PyThreadState *
b0329649b8cf Add a low-level API to access interpreters, for David Beazley.
Guido van Rossum <guido@python.org>
parents: 18689
diff changeset
439 PyInterpreterState_ThreadHead(PyInterpreterState *interp) {
b0329649b8cf Add a low-level API to access interpreters, for David Beazley.
Guido van Rossum <guido@python.org>
parents: 18689
diff changeset
440 return interp->tstate_head;
b0329649b8cf Add a low-level API to access interpreters, for David Beazley.
Guido van Rossum <guido@python.org>
parents: 18689
diff changeset
441 }
b0329649b8cf Add a low-level API to access interpreters, for David Beazley.
Guido van Rossum <guido@python.org>
parents: 18689
diff changeset
442
b0329649b8cf Add a low-level API to access interpreters, for David Beazley.
Guido van Rossum <guido@python.org>
parents: 18689
diff changeset
443 PyThreadState *
b0329649b8cf Add a low-level API to access interpreters, for David Beazley.
Guido van Rossum <guido@python.org>
parents: 18689
diff changeset
444 PyThreadState_Next(PyThreadState *tstate) {
b0329649b8cf Add a low-level API to access interpreters, for David Beazley.
Guido van Rossum <guido@python.org>
parents: 18689
diff changeset
445 return tstate->next;
b0329649b8cf Add a low-level API to access interpreters, for David Beazley.
Guido van Rossum <guido@python.org>
parents: 18689
diff changeset
446 }
28694
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
447
39118
85b23965ec4c SF bug 1524317: configure --without-threads fails to build
Tim Peters <tim.peters@gmail.com>
parents: 39056
diff changeset
448 /* The implementation of sys._current_frames(). This is intended to be
85b23965ec4c SF bug 1524317: configure --without-threads fails to build
Tim Peters <tim.peters@gmail.com>
parents: 39056
diff changeset
449 called with the GIL held, as it will be when called via
85b23965ec4c SF bug 1524317: configure --without-threads fails to build
Tim Peters <tim.peters@gmail.com>
parents: 39056
diff changeset
450 sys._current_frames(). It's possible it would work fine even without
85b23965ec4c SF bug 1524317: configure --without-threads fails to build
Tim Peters <tim.peters@gmail.com>
parents: 39056
diff changeset
451 the GIL held, but haven't thought enough about that.
85b23965ec4c SF bug 1524317: configure --without-threads fails to build
Tim Peters <tim.peters@gmail.com>
parents: 39056
diff changeset
452 */
85b23965ec4c SF bug 1524317: configure --without-threads fails to build
Tim Peters <tim.peters@gmail.com>
parents: 39056
diff changeset
453 PyObject *
85b23965ec4c SF bug 1524317: configure --without-threads fails to build
Tim Peters <tim.peters@gmail.com>
parents: 39056
diff changeset
454 _PyThread_CurrentFrames(void)
85b23965ec4c SF bug 1524317: configure --without-threads fails to build
Tim Peters <tim.peters@gmail.com>
parents: 39056
diff changeset
455 {
85b23965ec4c SF bug 1524317: configure --without-threads fails to build
Tim Peters <tim.peters@gmail.com>
parents: 39056
diff changeset
456 PyObject *result;
85b23965ec4c SF bug 1524317: configure --without-threads fails to build
Tim Peters <tim.peters@gmail.com>
parents: 39056
diff changeset
457 PyInterpreterState *i;
85b23965ec4c SF bug 1524317: configure --without-threads fails to build
Tim Peters <tim.peters@gmail.com>
parents: 39056
diff changeset
458
85b23965ec4c SF bug 1524317: configure --without-threads fails to build
Tim Peters <tim.peters@gmail.com>
parents: 39056
diff changeset
459 result = PyDict_New();
85b23965ec4c SF bug 1524317: configure --without-threads fails to build
Tim Peters <tim.peters@gmail.com>
parents: 39056
diff changeset
460 if (result == NULL)
85b23965ec4c SF bug 1524317: configure --without-threads fails to build
Tim Peters <tim.peters@gmail.com>
parents: 39056
diff changeset
461 return NULL;
85b23965ec4c SF bug 1524317: configure --without-threads fails to build
Tim Peters <tim.peters@gmail.com>
parents: 39056
diff changeset
462
85b23965ec4c SF bug 1524317: configure --without-threads fails to build
Tim Peters <tim.peters@gmail.com>
parents: 39056
diff changeset
463 /* for i in all interpreters:
85b23965ec4c SF bug 1524317: configure --without-threads fails to build
Tim Peters <tim.peters@gmail.com>
parents: 39056
diff changeset
464 * for t in all of i's thread states:
85b23965ec4c SF bug 1524317: configure --without-threads fails to build
Tim Peters <tim.peters@gmail.com>
parents: 39056
diff changeset
465 * if t's frame isn't NULL, map t's id to its frame
85b23965ec4c SF bug 1524317: configure --without-threads fails to build
Tim Peters <tim.peters@gmail.com>
parents: 39056
diff changeset
466 * Because these lists can mutute even when the GIL is held, we
85b23965ec4c SF bug 1524317: configure --without-threads fails to build
Tim Peters <tim.peters@gmail.com>
parents: 39056
diff changeset
467 * need to grab head_mutex for the duration.
85b23965ec4c SF bug 1524317: configure --without-threads fails to build
Tim Peters <tim.peters@gmail.com>
parents: 39056
diff changeset
468 */
85b23965ec4c SF bug 1524317: configure --without-threads fails to build
Tim Peters <tim.peters@gmail.com>
parents: 39056
diff changeset
469 HEAD_LOCK();
85b23965ec4c SF bug 1524317: configure --without-threads fails to build
Tim Peters <tim.peters@gmail.com>
parents: 39056
diff changeset
470 for (i = interp_head; i != NULL; i = i->next) {
85b23965ec4c SF bug 1524317: configure --without-threads fails to build
Tim Peters <tim.peters@gmail.com>
parents: 39056
diff changeset
471 PyThreadState *t;
85b23965ec4c SF bug 1524317: configure --without-threads fails to build
Tim Peters <tim.peters@gmail.com>
parents: 39056
diff changeset
472 for (t = i->tstate_head; t != NULL; t = t->next) {
85b23965ec4c SF bug 1524317: configure --without-threads fails to build
Tim Peters <tim.peters@gmail.com>
parents: 39056
diff changeset
473 PyObject *id;
85b23965ec4c SF bug 1524317: configure --without-threads fails to build
Tim Peters <tim.peters@gmail.com>
parents: 39056
diff changeset
474 int stat;
85b23965ec4c SF bug 1524317: configure --without-threads fails to build
Tim Peters <tim.peters@gmail.com>
parents: 39056
diff changeset
475 struct _frame *frame = t->frame;
85b23965ec4c SF bug 1524317: configure --without-threads fails to build
Tim Peters <tim.peters@gmail.com>
parents: 39056
diff changeset
476 if (frame == NULL)
85b23965ec4c SF bug 1524317: configure --without-threads fails to build
Tim Peters <tim.peters@gmail.com>
parents: 39056
diff changeset
477 continue;
85b23965ec4c SF bug 1524317: configure --without-threads fails to build
Tim Peters <tim.peters@gmail.com>
parents: 39056
diff changeset
478 id = PyInt_FromLong(t->thread_id);
85b23965ec4c SF bug 1524317: configure --without-threads fails to build
Tim Peters <tim.peters@gmail.com>
parents: 39056
diff changeset
479 if (id == NULL)
85b23965ec4c SF bug 1524317: configure --without-threads fails to build
Tim Peters <tim.peters@gmail.com>
parents: 39056
diff changeset
480 goto Fail;
85b23965ec4c SF bug 1524317: configure --without-threads fails to build
Tim Peters <tim.peters@gmail.com>
parents: 39056
diff changeset
481 stat = PyDict_SetItem(result, id, (PyObject *)frame);
85b23965ec4c SF bug 1524317: configure --without-threads fails to build
Tim Peters <tim.peters@gmail.com>
parents: 39056
diff changeset
482 Py_DECREF(id);
85b23965ec4c SF bug 1524317: configure --without-threads fails to build
Tim Peters <tim.peters@gmail.com>
parents: 39056
diff changeset
483 if (stat < 0)
85b23965ec4c SF bug 1524317: configure --without-threads fails to build
Tim Peters <tim.peters@gmail.com>
parents: 39056
diff changeset
484 goto Fail;
85b23965ec4c SF bug 1524317: configure --without-threads fails to build
Tim Peters <tim.peters@gmail.com>
parents: 39056
diff changeset
485 }
85b23965ec4c SF bug 1524317: configure --without-threads fails to build
Tim Peters <tim.peters@gmail.com>
parents: 39056
diff changeset
486 }
85b23965ec4c SF bug 1524317: configure --without-threads fails to build
Tim Peters <tim.peters@gmail.com>
parents: 39056
diff changeset
487 HEAD_UNLOCK();
85b23965ec4c SF bug 1524317: configure --without-threads fails to build
Tim Peters <tim.peters@gmail.com>
parents: 39056
diff changeset
488 return result;
85b23965ec4c SF bug 1524317: configure --without-threads fails to build
Tim Peters <tim.peters@gmail.com>
parents: 39056
diff changeset
489
85b23965ec4c SF bug 1524317: configure --without-threads fails to build
Tim Peters <tim.peters@gmail.com>
parents: 39056
diff changeset
490 Fail:
85b23965ec4c SF bug 1524317: configure --without-threads fails to build
Tim Peters <tim.peters@gmail.com>
parents: 39056
diff changeset
491 HEAD_UNLOCK();
85b23965ec4c SF bug 1524317: configure --without-threads fails to build
Tim Peters <tim.peters@gmail.com>
parents: 39056
diff changeset
492 Py_DECREF(result);
85b23965ec4c SF bug 1524317: configure --without-threads fails to build
Tim Peters <tim.peters@gmail.com>
parents: 39056
diff changeset
493 return NULL;
85b23965ec4c SF bug 1524317: configure --without-threads fails to build
Tim Peters <tim.peters@gmail.com>
parents: 39056
diff changeset
494 }
29643
fa97293533a9 Add PyThreadState_SetAsyncExc(long, PyObject *).
Guido van Rossum <guido@python.org>
parents: 28914
diff changeset
495
28694
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
496 /* Python "auto thread state" API. */
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
497 #ifdef WITH_THREAD
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
498
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
499 /* Keep this as a static, as it is not reliable! It can only
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
500 ever be compared to the state for the *current* thread.
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
501 * If not equal, then it doesn't matter that the actual
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
502 value may change immediately after comparison, as it can't
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
503 possibly change to the current thread's state.
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
504 * If equal, then the current thread holds the lock, so the value can't
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
505 change until we yield the lock.
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
506 */
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
507 static int
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
508 PyThreadState_IsCurrent(PyThreadState *tstate)
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
509 {
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
510 /* Must be the tstate for this thread */
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
511 assert(PyGILState_GetThisThreadState()==tstate);
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
512 /* On Windows at least, simple reads and writes to 32 bit values
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
513 are atomic.
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
514 */
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
515 return tstate == _PyThreadState_Current;
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
516 }
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
517
33698
090ffcb83f0a Trim trailing whitespace.
Tim Peters <tim.peters@gmail.com>
parents: 32301
diff changeset
518 /* Internal initialization/finalization functions called by
090ffcb83f0a Trim trailing whitespace.
Tim Peters <tim.peters@gmail.com>
parents: 32301
diff changeset
519 Py_Initialize/Py_Finalize
28694
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
520 */
33699
0c26db381673 Style guide & consistency changes. No semantic changes.
Tim Peters <tim.peters@gmail.com>
parents: 33698
diff changeset
521 void
0c26db381673 Style guide & consistency changes. No semantic changes.
Tim Peters <tim.peters@gmail.com>
parents: 33698
diff changeset
522 _PyGILState_Init(PyInterpreterState *i, PyThreadState *t)
28694
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
523 {
33699
0c26db381673 Style guide & consistency changes. No semantic changes.
Tim Peters <tim.peters@gmail.com>
parents: 33698
diff changeset
524 assert(i && t); /* must init with valid states */
28694
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
525 autoTLSkey = PyThread_create_key();
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
526 autoInterpreterState = i;
33706
4981ba54f43d _PyGILState_Init(), PyGILState_Ensure(): Since PyThread_set_key_value()
Tim Peters <tim.peters@gmail.com>
parents: 33699
diff changeset
527 assert(PyThread_get_key_value(autoTLSkey) == NULL);
35117
7ea2be2c0e1d Fix bug:
Michael W. Hudson <mwh@python.net>
parents: 35095
diff changeset
528 assert(t->gilstate_counter == 0);
7ea2be2c0e1d Fix bug:
Michael W. Hudson <mwh@python.net>
parents: 35095
diff changeset
529
7ea2be2c0e1d Fix bug:
Michael W. Hudson <mwh@python.net>
parents: 35095
diff changeset
530 _PyGILState_NoteThreadState(t);
28694
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
531 }
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
532
33699
0c26db381673 Style guide & consistency changes. No semantic changes.
Tim Peters <tim.peters@gmail.com>
parents: 33698
diff changeset
533 void
0c26db381673 Style guide & consistency changes. No semantic changes.
Tim Peters <tim.peters@gmail.com>
parents: 33698
diff changeset
534 _PyGILState_Fini(void)
28694
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
535 {
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
536 PyThread_delete_key(autoTLSkey);
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
537 autoTLSkey = 0;
39875
cab056903b3d Remove extra semi-colons reported by Johnny Lee on python-dev. Backport if anyone cares.
Neal Norwitz <nnorwitz@gmail.com>
parents: 39830
diff changeset
538 autoInterpreterState = NULL;
28694
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
539 }
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
540
35117
7ea2be2c0e1d Fix bug:
Michael W. Hudson <mwh@python.net>
parents: 35095
diff changeset
541 /* When a thread state is created for a thread by some mechanism other than
7ea2be2c0e1d Fix bug:
Michael W. Hudson <mwh@python.net>
parents: 35095
diff changeset
542 PyGILState_Ensure, it's important that the GILState machinery knows about
7ea2be2c0e1d Fix bug:
Michael W. Hudson <mwh@python.net>
parents: 35095
diff changeset
543 it so it doesn't try to create another thread state for the thread (this is
7ea2be2c0e1d Fix bug:
Michael W. Hudson <mwh@python.net>
parents: 35095
diff changeset
544 a better fix for SF bug #1010677 than the first one attempted).
7ea2be2c0e1d Fix bug:
Michael W. Hudson <mwh@python.net>
parents: 35095
diff changeset
545 */
39830
0bac40e4d0c6 Forward-port of rev. 51857:
Georg Brandl <georg@python.org>
parents: 39431
diff changeset
546 static void
35117
7ea2be2c0e1d Fix bug:
Michael W. Hudson <mwh@python.net>
parents: 35095
diff changeset
547 _PyGILState_NoteThreadState(PyThreadState* tstate)
7ea2be2c0e1d Fix bug:
Michael W. Hudson <mwh@python.net>
parents: 35095
diff changeset
548 {
7ea2be2c0e1d Fix bug:
Michael W. Hudson <mwh@python.net>
parents: 35095
diff changeset
549 /* If autoTLSkey is 0, this must be the very first threadstate created
7ea2be2c0e1d Fix bug:
Michael W. Hudson <mwh@python.net>
parents: 35095
diff changeset
550 in Py_Initialize(). Don't do anything for now (we'll be back here
7ea2be2c0e1d Fix bug:
Michael W. Hudson <mwh@python.net>
parents: 35095
diff changeset
551 when _PyGILState_Init is called). */
39056
b6fd499e4343 After approval from Anthony, merge the tim-current_frames
Tim Peters <tim.peters@gmail.com>
parents: 37752
diff changeset
552 if (!autoTLSkey)
35117
7ea2be2c0e1d Fix bug:
Michael W. Hudson <mwh@python.net>
parents: 35095
diff changeset
553 return;
39056
b6fd499e4343 After approval from Anthony, merge the tim-current_frames
Tim Peters <tim.peters@gmail.com>
parents: 37752
diff changeset
554
35117
7ea2be2c0e1d Fix bug:
Michael W. Hudson <mwh@python.net>
parents: 35095
diff changeset
555 /* Stick the thread state for this thread in thread local storage.
7ea2be2c0e1d Fix bug:
Michael W. Hudson <mwh@python.net>
parents: 35095
diff changeset
556
7ea2be2c0e1d Fix bug:
Michael W. Hudson <mwh@python.net>
parents: 35095
diff changeset
557 The only situation where you can legitimately have more than one
7ea2be2c0e1d Fix bug:
Michael W. Hudson <mwh@python.net>
parents: 35095
diff changeset
558 thread state for an OS level thread is when there are multiple
7ea2be2c0e1d Fix bug:
Michael W. Hudson <mwh@python.net>
parents: 35095
diff changeset
559 interpreters, when:
39056
b6fd499e4343 After approval from Anthony, merge the tim-current_frames
Tim Peters <tim.peters@gmail.com>
parents: 37752
diff changeset
560
35117
7ea2be2c0e1d Fix bug:
Michael W. Hudson <mwh@python.net>
parents: 35095
diff changeset
561 a) You shouldn't really be using the PyGILState_ APIs anyway,
7ea2be2c0e1d Fix bug:
Michael W. Hudson <mwh@python.net>
parents: 35095
diff changeset
562 and:
7ea2be2c0e1d Fix bug:
Michael W. Hudson <mwh@python.net>
parents: 35095
diff changeset
563
7ea2be2c0e1d Fix bug:
Michael W. Hudson <mwh@python.net>
parents: 35095
diff changeset
564 b) The slightly odd way PyThread_set_key_value works (see
7ea2be2c0e1d Fix bug:
Michael W. Hudson <mwh@python.net>
parents: 35095
diff changeset
565 comments by its implementation) means that the first thread
7ea2be2c0e1d Fix bug:
Michael W. Hudson <mwh@python.net>
parents: 35095
diff changeset
566 state created for that given OS level thread will "win",
7ea2be2c0e1d Fix bug:
Michael W. Hudson <mwh@python.net>
parents: 35095
diff changeset
567 which seems reasonable behaviour.
7ea2be2c0e1d Fix bug:
Michael W. Hudson <mwh@python.net>
parents: 35095
diff changeset
568 */
7ea2be2c0e1d Fix bug:
Michael W. Hudson <mwh@python.net>
parents: 35095
diff changeset
569 if (PyThread_set_key_value(autoTLSkey, (void *)tstate) < 0)
7ea2be2c0e1d Fix bug:
Michael W. Hudson <mwh@python.net>
parents: 35095
diff changeset
570 Py_FatalError("Couldn't create autoTLSkey mapping");
7ea2be2c0e1d Fix bug:
Michael W. Hudson <mwh@python.net>
parents: 35095
diff changeset
571
7ea2be2c0e1d Fix bug:
Michael W. Hudson <mwh@python.net>
parents: 35095
diff changeset
572 /* PyGILState_Release must not try to delete this thread state. */
7ea2be2c0e1d Fix bug:
Michael W. Hudson <mwh@python.net>
parents: 35095
diff changeset
573 tstate->gilstate_counter = 1;
7ea2be2c0e1d Fix bug:
Michael W. Hudson <mwh@python.net>
parents: 35095
diff changeset
574 }
7ea2be2c0e1d Fix bug:
Michael W. Hudson <mwh@python.net>
parents: 35095
diff changeset
575
28694
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
576 /* The public functions */
33699
0c26db381673 Style guide & consistency changes. No semantic changes.
Tim Peters <tim.peters@gmail.com>
parents: 33698
diff changeset
577 PyThreadState *
0c26db381673 Style guide & consistency changes. No semantic changes.
Tim Peters <tim.peters@gmail.com>
parents: 33698
diff changeset
578 PyGILState_GetThisThreadState(void)
28694
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
579 {
33699
0c26db381673 Style guide & consistency changes. No semantic changes.
Tim Peters <tim.peters@gmail.com>
parents: 33698
diff changeset
580 if (autoInterpreterState == NULL || autoTLSkey == 0)
28694
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
581 return NULL;
33699
0c26db381673 Style guide & consistency changes. No semantic changes.
Tim Peters <tim.peters@gmail.com>
parents: 33698
diff changeset
582 return (PyThreadState *)PyThread_get_key_value(autoTLSkey);
28694
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
583 }
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
584
33699
0c26db381673 Style guide & consistency changes. No semantic changes.
Tim Peters <tim.peters@gmail.com>
parents: 33698
diff changeset
585 PyGILState_STATE
0c26db381673 Style guide & consistency changes. No semantic changes.
Tim Peters <tim.peters@gmail.com>
parents: 33698
diff changeset
586 PyGILState_Ensure(void)
28694
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
587 {
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
588 int current;
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
589 PyThreadState *tcur;
33698
090ffcb83f0a Trim trailing whitespace.
Tim Peters <tim.peters@gmail.com>
parents: 32301
diff changeset
590 /* Note that we do not auto-init Python here - apart from
090ffcb83f0a Trim trailing whitespace.
Tim Peters <tim.peters@gmail.com>
parents: 32301
diff changeset
591 potential races with 2 threads auto-initializing, pep-311
28694
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
592 spells out other issues. Embedders are expected to have
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
593 called Py_Initialize() and usually PyEval_InitThreads().
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
594 */
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
595 assert(autoInterpreterState); /* Py_Initialize() hasn't been called! */
37606
f448d0075691 more low-hanging fruit to make code compile under a C++ compiler. Not
Anthony Baxter <anthonybaxter@gmail.com>
parents: 36683
diff changeset
596 tcur = (PyThreadState *)PyThread_get_key_value(autoTLSkey);
33699
0c26db381673 Style guide & consistency changes. No semantic changes.
Tim Peters <tim.peters@gmail.com>
parents: 33698
diff changeset
597 if (tcur == NULL) {
28694
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
598 /* Create a new thread state for this thread */
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
599 tcur = PyThreadState_New(autoInterpreterState);
33699
0c26db381673 Style guide & consistency changes. No semantic changes.
Tim Peters <tim.peters@gmail.com>
parents: 33698
diff changeset
600 if (tcur == NULL)
28694
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
601 Py_FatalError("Couldn't create thread-state for new thread");
35117
7ea2be2c0e1d Fix bug:
Michael W. Hudson <mwh@python.net>
parents: 35095
diff changeset
602 /* This is our thread state! We'll need to delete it in the
7ea2be2c0e1d Fix bug:
Michael W. Hudson <mwh@python.net>
parents: 35095
diff changeset
603 matching call to PyGILState_Release(). */
7ea2be2c0e1d Fix bug:
Michael W. Hudson <mwh@python.net>
parents: 35095
diff changeset
604 tcur->gilstate_counter = 0;
28694
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
605 current = 0; /* new thread state is never current */
33699
0c26db381673 Style guide & consistency changes. No semantic changes.
Tim Peters <tim.peters@gmail.com>
parents: 33698
diff changeset
606 }
0c26db381673 Style guide & consistency changes. No semantic changes.
Tim Peters <tim.peters@gmail.com>
parents: 33698
diff changeset
607 else
28694
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
608 current = PyThreadState_IsCurrent(tcur);
33699
0c26db381673 Style guide & consistency changes. No semantic changes.
Tim Peters <tim.peters@gmail.com>
parents: 33698
diff changeset
609 if (current == 0)
28694
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
610 PyEval_RestoreThread(tcur);
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
611 /* Update our counter in the thread-state - no need for locks:
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
612 - tcur will remain valid as we hold the GIL.
33698
090ffcb83f0a Trim trailing whitespace.
Tim Peters <tim.peters@gmail.com>
parents: 32301
diff changeset
613 - the counter is safe as we are the only thread "allowed"
28694
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
614 to modify this value
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
615 */
33699
0c26db381673 Style guide & consistency changes. No semantic changes.
Tim Peters <tim.peters@gmail.com>
parents: 33698
diff changeset
616 ++tcur->gilstate_counter;
28694
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
617 return current ? PyGILState_LOCKED : PyGILState_UNLOCKED;
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
618 }
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
619
33699
0c26db381673 Style guide & consistency changes. No semantic changes.
Tim Peters <tim.peters@gmail.com>
parents: 33698
diff changeset
620 void
0c26db381673 Style guide & consistency changes. No semantic changes.
Tim Peters <tim.peters@gmail.com>
parents: 33698
diff changeset
621 PyGILState_Release(PyGILState_STATE oldstate)
28694
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
622 {
37606
f448d0075691 more low-hanging fruit to make code compile under a C++ compiler. Not
Anthony Baxter <anthonybaxter@gmail.com>
parents: 36683
diff changeset
623 PyThreadState *tcur = (PyThreadState *)PyThread_get_key_value(
f448d0075691 more low-hanging fruit to make code compile under a C++ compiler. Not
Anthony Baxter <anthonybaxter@gmail.com>
parents: 36683
diff changeset
624 autoTLSkey);
33699
0c26db381673 Style guide & consistency changes. No semantic changes.
Tim Peters <tim.peters@gmail.com>
parents: 33698
diff changeset
625 if (tcur == NULL)
28694
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
626 Py_FatalError("auto-releasing thread-state, "
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
627 "but no thread-state for this thread");
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
628 /* We must hold the GIL and have our thread state current */
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
629 /* XXX - remove the check - the assert should be fine,
33698
090ffcb83f0a Trim trailing whitespace.
Tim Peters <tim.peters@gmail.com>
parents: 32301
diff changeset
630 but while this is very new (April 2003), the extra check
28694
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
631 by release-only users can't hurt.
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
632 */
33699
0c26db381673 Style guide & consistency changes. No semantic changes.
Tim Peters <tim.peters@gmail.com>
parents: 33698
diff changeset
633 if (! PyThreadState_IsCurrent(tcur))
28694
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
634 Py_FatalError("This thread state must be current when releasing");
33699
0c26db381673 Style guide & consistency changes. No semantic changes.
Tim Peters <tim.peters@gmail.com>
parents: 33698
diff changeset
635 assert(PyThreadState_IsCurrent(tcur));
0c26db381673 Style guide & consistency changes. No semantic changes.
Tim Peters <tim.peters@gmail.com>
parents: 33698
diff changeset
636 --tcur->gilstate_counter;
0c26db381673 Style guide & consistency changes. No semantic changes.
Tim Peters <tim.peters@gmail.com>
parents: 33698
diff changeset
637 assert(tcur->gilstate_counter >= 0); /* illegal counter value */
28694
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
638
33940
dfd07b7be407 SF bug 1061968: threads: segfault or Py_FatalError at exit
Tim Peters <tim.peters@gmail.com>
parents: 33714
diff changeset
639 /* If we're going to destroy this thread-state, we must
dfd07b7be407 SF bug 1061968: threads: segfault or Py_FatalError at exit
Tim Peters <tim.peters@gmail.com>
parents: 33714
diff changeset
640 * clear it while the GIL is held, as destructors may run.
dfd07b7be407 SF bug 1061968: threads: segfault or Py_FatalError at exit
Tim Peters <tim.peters@gmail.com>
parents: 33714
diff changeset
641 */
33699
0c26db381673 Style guide & consistency changes. No semantic changes.
Tim Peters <tim.peters@gmail.com>
parents: 33698
diff changeset
642 if (tcur->gilstate_counter == 0) {
28694
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
643 /* can't have been locked when we created it */
33699
0c26db381673 Style guide & consistency changes. No semantic changes.
Tim Peters <tim.peters@gmail.com>
parents: 33698
diff changeset
644 assert(oldstate == PyGILState_UNLOCKED);
28694
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
645 PyThreadState_Clear(tcur);
33940
dfd07b7be407 SF bug 1061968: threads: segfault or Py_FatalError at exit
Tim Peters <tim.peters@gmail.com>
parents: 33714
diff changeset
646 /* Delete the thread-state. Note this releases the GIL too!
dfd07b7be407 SF bug 1061968: threads: segfault or Py_FatalError at exit
Tim Peters <tim.peters@gmail.com>
parents: 33714
diff changeset
647 * It's vital that the GIL be held here, to avoid shutdown
dfd07b7be407 SF bug 1061968: threads: segfault or Py_FatalError at exit
Tim Peters <tim.peters@gmail.com>
parents: 33714
diff changeset
648 * races; see bugs 225673 and 1061968 (that nasty bug has a
dfd07b7be407 SF bug 1061968: threads: segfault or Py_FatalError at exit
Tim Peters <tim.peters@gmail.com>
parents: 33714
diff changeset
649 * habit of coming back).
dfd07b7be407 SF bug 1061968: threads: segfault or Py_FatalError at exit
Tim Peters <tim.peters@gmail.com>
parents: 33714
diff changeset
650 */
dfd07b7be407 SF bug 1061968: threads: segfault or Py_FatalError at exit
Tim Peters <tim.peters@gmail.com>
parents: 33714
diff changeset
651 PyThreadState_DeleteCurrent();
28694
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
652 }
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
653 /* Release the lock if necessary */
33940
dfd07b7be407 SF bug 1061968: threads: segfault or Py_FatalError at exit
Tim Peters <tim.peters@gmail.com>
parents: 33714
diff changeset
654 else if (oldstate == PyGILState_UNLOCKED)
34928
9857daa22807 Backport my recent fix (rev. 2.40 of Python/pystate.c):
Michael W. Hudson <mwh@python.net>
parents: 34568
diff changeset
655 PyEval_SaveThread();
28694
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
656 }
37655
2f3f2e32dfd9 spread the extern "C" { } magic pixie dust around. Python itself builds now
Anthony Baxter <anthonybaxter@gmail.com>
parents: 37606
diff changeset
657
2f3f2e32dfd9 spread the extern "C" { } magic pixie dust around. Python itself builds now
Anthony Baxter <anthonybaxter@gmail.com>
parents: 37606
diff changeset
658 #ifdef __cplusplus
2f3f2e32dfd9 spread the extern "C" { } magic pixie dust around. Python itself builds now
Anthony Baxter <anthonybaxter@gmail.com>
parents: 37606
diff changeset
659 }
2f3f2e32dfd9 spread the extern "C" { } magic pixie dust around. Python itself builds now
Anthony Baxter <anthonybaxter@gmail.com>
parents: 37606
diff changeset
660 #endif
2f3f2e32dfd9 spread the extern "C" { } magic pixie dust around. Python itself builds now
Anthony Baxter <anthonybaxter@gmail.com>
parents: 37606
diff changeset
661
28694
a4154dd5939a New PyGILState_ API - implements pep 311, from patch 684256.
Mark Hammond <mhammond@skippinet.com.au>
parents: 28616
diff changeset
662 #endif /* WITH_THREAD */
37655
2f3f2e32dfd9 spread the extern "C" { } magic pixie dust around. Python itself builds now
Anthony Baxter <anthonybaxter@gmail.com>
parents: 37606
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663
2f3f2e32dfd9 spread the extern "C" { } magic pixie dust around. Python itself builds now
Anthony Baxter <anthonybaxter@gmail.com>
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