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annotate Python/thread_cthread.h @ 68231:5fd74354d73b 2.0

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Close 2.0 branch.
author Georg Brandl <georg@python.org>
date Sat, 05 Mar 2011 14:54:19 +0100
parents 6f6f965c5e2d
children 5b4abceff53d
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1
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2 #include <mach/cthreads.h>
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3
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4
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5 /*
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6 * Initialization.
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7 */
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8 static void
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9 PyThread__init_thread(void)
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10 {
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11 cthread_init();
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12 }
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14 /*
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15 * Thread support.
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16 */
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17 int
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18 PyThread_start_new_thread(func, void (*func)(void *), void *arg)
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19 {
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20 int success = 0; /* init not needed when SOLARIS_THREADS and */
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21 /* C_THREADS implemented properly */
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22
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23 dprintf(("PyThread_start_new_thread called\n"));
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24 if (!initialized)
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25 PyThread_init_thread();
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26 /* looks like solaris detaches the thread to never rejoin
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27 * so well do it here
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28 */
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29 cthread_detach(cthread_fork((cthread_fn_t) func, arg));
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30 return success < 0 ? 0 : 1;
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31 }
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33 long
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34 PyThread_get_thread_ident(void)
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35 {
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36 if (!initialized)
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37 PyThread_init_thread();
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38 return (long) cthread_self();
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39 }
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41 static void
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42 do_PyThread_exit_thread(int no_cleanup)
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43 {
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44 dprintf(("PyThread_exit_thread called\n"));
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45 if (!initialized)
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46 if (no_cleanup)
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47 _exit(0);
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48 else
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49 exit(0);
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50 cthread_exit(0);
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51 }
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53 void
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54 PyThread_exit_thread(void)
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55 {
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56 do_PyThread_exit_thread(0);
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57 }
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59 void
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60 PyThread__exit_thread(void)
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61 {
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62 do_PyThread_exit_thread(1);
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63 }
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65 #ifndef NO_EXIT_PROG
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66 static
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67 void do_PyThread_exit_prog(int status, int no_cleanup)
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68 {
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69 dprintf(("PyThread_exit_prog(%d) called\n", status));
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70 if (!initialized)
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71 if (no_cleanup)
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72 _exit(status);
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73 else
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74 exit(status);
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75 if (no_cleanup)
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76 _exit(status);
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77 else
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78 exit(status);
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79 }
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81 void
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82 PyThread_exit_prog(int status)
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83 {
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84 do_PyThread_exit_prog(status, 0);
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85 }
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87 void
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88 PyThread__exit_prog(int status)
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89 {
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90 do_PyThread_exit_prog(status, 1);
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91 }
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92 #endif /* NO_EXIT_PROG */
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93
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94 /*
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95 * Lock support.
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96 */
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97 PyThread_type_lock
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98 PyThread_allocate_lock(void)
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99 {
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100 mutex_t lock;
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101
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102 dprintf(("PyThread_allocate_lock called\n"));
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103 if (!initialized)
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104 PyThread_init_thread();
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105
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106 lock = mutex_alloc();
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107 if (mutex_init(lock)) {
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108 perror("mutex_init");
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109 free((void *) lock);
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110 lock = 0;
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111 }
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112 dprintf(("PyThread_allocate_lock() -> %p\n", lock));
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113 return (PyThread_type_lock) lock;
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114 }
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115
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116 void
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117 PyThread_free_lock(PyThread_type_lock lock)
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118 {
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119 dprintf(("PyThread_free_lock(%p) called\n", lock));
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120 mutex_free(lock);
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121 }
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122
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123 int
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124 PyThread_acquire_lock(PyThread_type_lock lock, int waitflag)
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125 {
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126 int success = FALSE;
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127
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128 dprintf(("PyThread_acquire_lock(%p, %d) called\n", lock, waitflag));
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129 if (waitflag) { /* blocking */
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130 mutex_lock(lock);
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131 success = TRUE;
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132 } else { /* non blocking */
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133 success = mutex_try_lock(lock);
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134 }
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135 dprintf(("PyThread_acquire_lock(%p, %d) -> %d\n", lock, waitflag, success));
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136 return success;
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137 }
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138
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139 void
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140 PyThread_release_lock(PyThread_type_lock lock)
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141 {
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142 dprintf(("PyThread_release_lock(%p) called\n", lock));
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143 mutex_unlock((mutex_t )lock);
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144 }
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145
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146 /*
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147 * Semaphore support.
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148 *
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149 * This implementation is ripped directly from the pthreads implementation.
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150 * Which is to say that it is 100% non-functional at this time.
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151 *
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152 * Assuming the page is still up, documentation can be found at:
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153 *
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154 * http://www.doc.ic.ac.uk/~mac/manuals/solaris-manual-pages/solaris/usr/man/man2/_lwp_sema_wait.2.html
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155 *
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156 * Looking at the man page, it seems that one could easily implement a
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157 * semaphore using a condition.
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158 *
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159 */
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160 PyThread_type_sema
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161 PyThread_allocate_sema(int value)
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162 {
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163 char *sema = 0;
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164 dprintf(("PyThread_allocate_sema called\n"));
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165 if (!initialized)
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166 PyThread_init_thread();
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167
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168 dprintf(("PyThread_allocate_sema() -> %p\n", sema));
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169 return (PyThread_type_sema) sema;
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170 }
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171
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172 void
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173 PyThread_free_sema(PyThread_type_sema sema)
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174 {
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175 dprintf(("PyThread_free_sema(%p) called\n", sema));
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176 }
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177
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178 int
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179 PyThread_down_sema(PyThread_type_sema sema, int waitflag)
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180 {
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181 dprintf(("PyThread_down_sema(%p, %d) called\n", sema, waitflag));
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182 dprintf(("PyThread_down_sema(%p) return\n", sema));
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183 return -1;
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184 }
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185
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186 void
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187 PyThread_up_sema(PyThread_type_sema sema)
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188 {
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189 dprintf(("PyThread_up_sema(%p)\n", sema));
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190 }