Mercurial > cpython-lru_cache-weakref

annotate Python/thread_cthread.h @ 36683:da2a1049215d legacy-trunk

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Patch 1413181, by Gabriel Becedillas. PyThreadState_Delete(): if the auto-GIL-state machinery knows about the thread state, forget it (since the thread state is being deleted, continuing to remember it can't help, but can hurt if another thread happens to get created with the same thread id). I'll backport to 2.4 next.
author Tim Peters <tim.peters@gmail.com>
date Mon, 27 Feb 2006 17:15:31 +0000
parents 8b116a8449bd
children e38335d4df91 df5719c298db
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1
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2 #ifdef MACH_C_THREADS
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3 #include <mach/cthreads.h>
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4 #endif
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6 #ifdef HURD_C_THREADS
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7 #include <cthreads.h>
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8 #endif
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10 /*
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11 * Initialization.
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12 */
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14 PyThread__init_thread(void)
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16 #ifndef HURD_C_THREADS
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17 /* Roland McGrath said this should not be used since this is
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18 done while linking to threads */
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19 cthread_init();
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20 #else
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21 /* do nothing */
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22 ;
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23 #endif
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24 }
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26 /*
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27 * Thread support.
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28 */
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29 long
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30 PyThread_start_new_thread(void (*func)(void *), void *arg)
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32 int success = 0; /* init not needed when SOLARIS_THREADS and */
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33 /* C_THREADS implemented properly */
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35 dprintf(("PyThread_start_new_thread called\n"));
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36 if (!initialized)
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37 PyThread_init_thread();
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38 /* looks like solaris detaches the thread to never rejoin
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39 * so well do it here
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40 */
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41 cthread_detach(cthread_fork((cthread_fn_t) func, arg));
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42 return success < 0 ? -1 : 0;
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45 long
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46 PyThread_get_thread_ident(void)
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47 {
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48 if (!initialized)
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49 PyThread_init_thread();
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50 return (long) cthread_self();
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51 }
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53 static void
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54 do_PyThread_exit_thread(int no_cleanup)
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55 {
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56 dprintf(("PyThread_exit_thread called\n"));
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57 if (!initialized)
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58 if (no_cleanup)
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59 _exit(0);
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60 else
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61 exit(0);
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62 cthread_exit(0);
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63 }
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65 void
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66 PyThread_exit_thread(void)
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67 {
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68 do_PyThread_exit_thread(0);
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69 }
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71 void
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72 PyThread__exit_thread(void)
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73 {
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74 do_PyThread_exit_thread(1);
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75 }
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76
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77 #ifndef NO_EXIT_PROG
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78 static
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79 void do_PyThread_exit_prog(int status, int no_cleanup)
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80 {
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81 dprintf(("PyThread_exit_prog(%d) called\n", status));
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82 if (!initialized)
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83 if (no_cleanup)
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84 _exit(status);
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85 else
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86 exit(status);
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87 if (no_cleanup)
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88 _exit(status);
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89 else
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90 exit(status);
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91 }
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93 void
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94 PyThread_exit_prog(int status)
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95 {
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96 do_PyThread_exit_prog(status, 0);
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97 }
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99 void
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100 PyThread__exit_prog(int status)
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101 {
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102 do_PyThread_exit_prog(status, 1);
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103 }
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104 #endif /* NO_EXIT_PROG */
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105
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106 /*
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107 * Lock support.
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108 */
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109 PyThread_type_lock
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110 PyThread_allocate_lock(void)
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111 {
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112 mutex_t lock;
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113
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114 dprintf(("PyThread_allocate_lock called\n"));
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115 if (!initialized)
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116 PyThread_init_thread();
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117
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118 lock = mutex_alloc();
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119 if (mutex_init(lock)) {
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120 perror("mutex_init");
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121 free((void *) lock);
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122 lock = 0;
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123 }
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124 dprintf(("PyThread_allocate_lock() -> %p\n", lock));
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125 return (PyThread_type_lock) lock;
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126 }
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127
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128 void
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129 PyThread_free_lock(PyThread_type_lock lock)
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130 {
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131 dprintf(("PyThread_free_lock(%p) called\n", lock));
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132 mutex_free(lock);
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133 }
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134
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135 int
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136 PyThread_acquire_lock(PyThread_type_lock lock, int waitflag)
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137 {
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138 int success = FALSE;
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139
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140 dprintf(("PyThread_acquire_lock(%p, %d) called\n", lock, waitflag));
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141 if (waitflag) { /* blocking */
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142 mutex_lock((mutex_t)lock);
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143 success = TRUE;
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144 } else { /* non blocking */
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145 success = mutex_try_lock((mutex_t)lock);
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146 }
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147 dprintf(("PyThread_acquire_lock(%p, %d) -> %d\n", lock, waitflag, success));
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148 return success;
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149 }
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150
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151 void
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152 PyThread_release_lock(PyThread_type_lock lock)
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153 {
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154 dprintf(("PyThread_release_lock(%p) called\n", lock));
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155 mutex_unlock((mutex_t )lock);
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156 }