Mercurial > cpython-lru_cache-weakref

annotate Python/thread_cthread.h @ 40406:39ad99dd67e4 2.4

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Backport of r52862.
author Armin Rigo <arigo@tunes.org>
date Wed, 29 Nov 2006 22:07:38 +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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13 static void
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14 PyThread__init_thread(void)
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15 {
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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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25
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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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31 {
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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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43 }
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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 }