Mercurial > cpython-lru_cache-weakref

annotate Python/thread_wince.h @ 73244:b48e1b48e670 2.5

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2.5 is no longer maintained
author Martin v. Löwis <martin@v.loewis.de>
date Mon, 31 Oct 2011 12:38:50 +0100
parents 58d5a6c7b629
children e38335d4df91 df5719c298db
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1
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2 /* This code implemented by Mark Hammond (MHammond@skippinet.com.au) */
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3
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4 #include <windows.h>
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5 #include <limits.h>
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6 #include <pydebug.h>
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7
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8 long PyThread_get_thread_ident(void);
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9
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10 /*
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11 * Change all headers to pure ANSI as no one will use K&R style on an
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12 * NT
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13 */
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14
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15 /*
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16 * Initialization of the C package, should not be needed.
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17 */
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18 static void PyThread__init_thread(void)
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19 {
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20 }
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21
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22 /*
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23 * Thread support.
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24 */
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25 long PyThread_start_new_thread(void (*func)(void *), void *arg)
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26 {
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27 long rv;
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28 int success = -1;
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29
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30 dprintf(("%ld: PyThread_start_new_thread called\n", PyThread_get_thread_ident()));
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31 if (!initialized)
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32 PyThread_init_thread();
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33
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34 rv = _beginthread(func, 0, arg); /* use default stack size */
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35
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36 if (rv != -1) {
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37 success = 0;
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38 dprintf(("%ld: PyThread_start_new_thread succeeded:\n", PyThread_get_thread_ident()));
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39 }
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40
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41 return success;
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42 }
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43
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44 /*
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45 * Return the thread Id instead of an handle. The Id is said to uniquely identify the
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46 * thread in the system
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47 */
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48 long PyThread_get_thread_ident(void)
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49 {
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50 if (!initialized)
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51 PyThread_init_thread();
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52
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53 return GetCurrentThreadId();
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54 }
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55
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56 static void do_PyThread_exit_thread(int no_cleanup)
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57 {
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58 dprintf(("%ld: do_PyThread_exit_thread called\n", PyThread_get_thread_ident()));
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59 if (!initialized)
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60 if (no_cleanup)
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61 exit(0); /* XXX - was _exit()!! */
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62 else
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63 exit(0);
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64 _endthread();
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65 }
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66
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67 void PyThread_exit_thread(void)
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68 {
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69 do_PyThread_exit_thread(0);
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70 }
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71
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72 void 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 void do_PyThread_exit_prog(int status, int no_cleanup)
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79 {
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80 dprintf(("PyThread_exit_prog(%d) called\n", status));
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81 if (!initialized)
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82 if (no_cleanup)
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83 _exit(status);
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84 else
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85 exit(status);
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86 }
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87
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88 void PyThread_exit_prog(int status)
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89 {
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90 do_PyThread_exit_prog(status, 0);
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91 }
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92
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93 void PyThread__exit_prog(int status)
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94 {
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95 do_PyThread_exit_prog(status, 1);
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96 }
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97 #endif /* NO_EXIT_PROG */
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98
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99 /*
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100 * Lock support. It has to be implemented using Mutexes, as
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101 * CE doesnt support semaphores. Therefore we use some hacks to
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102 * simulate the non reentrant requirements of Python locks
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103 */
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104 PyThread_type_lock PyThread_allocate_lock(void)
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105 {
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106 HANDLE aLock;
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107
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108 dprintf(("PyThread_allocate_lock called\n"));
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109 if (!initialized)
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110 PyThread_init_thread();
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111
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112 aLock = CreateEvent(NULL, /* Security attributes */
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113 0, /* Manual-Reset */
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114 1, /* Is initially signalled */
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115 NULL); /* Name of event */
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116
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117 dprintf(("%ld: PyThread_allocate_lock() -> %p\n", PyThread_get_thread_ident(), aLock));
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118
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119 return (PyThread_type_lock) aLock;
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120 }
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121
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122 void PyThread_free_lock(PyThread_type_lock aLock)
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123 {
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124 dprintf(("%ld: PyThread_free_lock(%p) called\n", PyThread_get_thread_ident(),aLock));
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125
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126 CloseHandle(aLock);
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127 }
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128
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129 /*
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130 * Return 1 on success if the lock was acquired
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131 *
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132 * and 0 if the lock was not acquired. This means a 0 is returned
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133 * if the lock has already been acquired by this thread!
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134 */
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135 int PyThread_acquire_lock(PyThread_type_lock aLock, int waitflag)
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136 {
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137 int success = 1;
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138 DWORD waitResult;
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139
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140 dprintf(("%ld: PyThread_acquire_lock(%p, %d) called\n", PyThread_get_thread_ident(),aLock, waitflag));
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141
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142 #ifndef DEBUG
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143 waitResult = WaitForSingleObject(aLock, (waitflag ? INFINITE : 0));
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144 #else
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145 /* To aid in debugging, we regularly wake up. This allows us to
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146 break into the debugger */
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147 while (TRUE) {
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148 waitResult = WaitForSingleObject(aLock, waitflag ? 3000 : 0);
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149 if (waitflag==0 || (waitflag && waitResult == WAIT_OBJECT_0))
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150 break;
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151 }
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152 #endif
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153
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154 if (waitResult != WAIT_OBJECT_0) {
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155 success = 0; /* We failed */
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156 }
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157
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158 dprintf(("%ld: PyThread_acquire_lock(%p, %d) -> %d\n", PyThread_get_thread_ident(),aLock, waitflag, success));
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159
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160 return success;
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161 }
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162
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163 void PyThread_release_lock(PyThread_type_lock aLock)
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164 {
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165 dprintf(("%ld: PyThread_release_lock(%p) called\n", PyThread_get_thread_ident(),aLock));
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166
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167 if (!SetEvent(aLock))
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168 dprintf(("%ld: Could not PyThread_release_lock(%p) error: %l\n", PyThread_get_thread_ident(), aLock, GetLastError()));
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169 }
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170
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171