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annotate Python/thread_lwp.h @ 56121:ea697cde6882 3.1

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Merged revisions 74881-74885,74888,74891-74895,74900,74905-74906,74931-74932,74934,74941-74942,74944,74956 via svnmerge from svn+ssh://pythondev@svn.python.org/python/branches/py3k ........ r74881 | r.david.murray | 2009-09-17 15:12:49 -0400 (Thu, 17 Sep 2009) | 2 lines Check in first draft of maintainers.rst. ........ r74882 | eric.smith | 2009-09-17 15:22:30 -0400 (Thu, 17 Sep 2009) | 1 line Typo. ........ r74883 | mark.dickinson | 2009-09-17 15:37:28 -0400 (Thu, 17 Sep 2009) | 1 line Add some more module maintainers. ........ r74884 | mark.dickinson | 2009-09-17 15:39:12 -0400 (Thu, 17 Sep 2009) | 1 line Revert accidental changes to Objects/longobject.c ........ r74885 | mark.dickinson | 2009-09-17 16:20:01 -0400 (Thu, 17 Sep 2009) | 1 line Add decimal maintainers ........ r74888 | r.david.murray | 2009-09-17 18:10:48 -0400 (Thu, 17 Sep 2009) | 2 lines Maintainer additions from MAL. ........ r74891 | georg.brandl | 2009-09-17 18:18:01 -0400 (Thu, 17 Sep 2009) | 1 line Some more maintainers. ........ r74892 | r.david.murray | 2009-09-17 19:23:56 -0400 (Thu, 17 Sep 2009) | 2 lines Add a couple interest areas for Nick per his request. ........ r74893 | r.david.murray | 2009-09-17 19:43:20 -0400 (Thu, 17 Sep 2009) | 2 lines Benajmin is also compiler-knowledgeable. ........ r74894 | alexandre.vassalotti | 2009-09-17 20:59:05 -0400 (Thu, 17 Sep 2009) | 2 lines Added myself to my areas of interest. ........ r74895 | brett.cannon | 2009-09-17 21:03:35 -0400 (Thu, 17 Sep 2009) | 1 line Add myself to a couple places as maintainer. ........ r74900 | georg.brandl | 2009-09-18 05:06:37 -0400 (Fri, 18 Sep 2009) | 1 line Add myself in interest areas. ........ r74905 | ezio.melotti | 2009-09-18 05:58:43 -0400 (Fri, 18 Sep 2009) | 1 line Add myself in interest areas and mark effbot as inactive in winsound ........ r74906 | antoine.pitrou | 2009-09-18 09:15:23 -0400 (Fri, 18 Sep 2009) | 3 lines Add myself in a couple of places ........ r74931 | r.david.murray | 2009-09-18 17:25:36 -0400 (Fri, 18 Sep 2009) | 5 lines Add some names gleaned from the "Tracker Archeology" thread on python-dev from back in February. Also consolidate the autoconf and makefiles topics into one, and add tracker and svn/hg topics. ........ r74932 | r.david.murray | 2009-09-18 17:32:16 -0400 (Fri, 18 Sep 2009) | 2 lines Remove non-committer mistakenly added. ........ r74934 | r.david.murray | 2009-09-18 17:40:30 -0400 (Fri, 18 Sep 2009) | 2 lines More descriptive/generic name for the svn/hg entry (version control) ........ r74941 | benjamin.peterson | 2009-09-18 18:45:59 -0400 (Fri, 18 Sep 2009) | 1 line add a new category for myself ........ r74942 | benjamin.peterson | 2009-09-18 18:50:55 -0400 (Fri, 18 Sep 2009) | 1 line add myself for symtable ........ r74944 | georg.brandl | 2009-09-19 03:39:05 -0400 (Sat, 19 Sep 2009) | 1 line I would like to maintain the token module! ........ r74956 | r.david.murray | 2009-09-19 14:40:08 -0400 (Sat, 19 Sep 2009) | 3 lines Add everyone who we know has been a release manager as a resource for the 'release management' topic. ........
author R. David Murray <rdmurray@bitdance.com>
date Sat, 19 Sep 2009 19:04:37 +0000
parents 8b116a8449bd
children e38335d4df91 df5719c298db
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1
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2 #include <stdlib.h>
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3 #include <lwp/lwp.h>
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4 #include <lwp/stackdep.h>
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5
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6 #define STACKSIZE 1000 /* stacksize for a thread */
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7 #define NSTACKS 2 /* # stacks to be put in cache initially */
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9 struct lock {
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10 int lock_locked;
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11 cv_t lock_condvar;
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12 mon_t lock_monitor;
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13 };
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16 /*
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17 * Initialization.
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18 */
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19 static void PyThread__init_thread(void)
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20 {
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21 lwp_setstkcache(STACKSIZE, NSTACKS);
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22 }
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24 /*
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25 * Thread support.
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26 */
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29 long PyThread_start_new_thread(void (*func)(void *), void *arg)
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30 {
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31 thread_t tid;
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32 int success;
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33 dprintf(("PyThread_start_new_thread called\n"));
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34 if (!initialized)
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35 PyThread_init_thread();
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36 success = lwp_create(&tid, func, MINPRIO, 0, lwp_newstk(), 1, arg);
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37 return success < 0 ? -1 : 0;
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38 }
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39
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40 long PyThread_get_thread_ident(void)
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41 {
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42 thread_t tid;
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43 if (!initialized)
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44 PyThread_init_thread();
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45 if (lwp_self(&tid) < 0)
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46 return -1;
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47 return tid.thread_id;
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48 }
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49
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50 static void do_PyThread_exit_thread(int no_cleanup)
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51 {
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52 dprintf(("PyThread_exit_thread called\n"));
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53 if (!initialized)
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54 if (no_cleanup)
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55 _exit(0);
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56 else
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57 exit(0);
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58 lwp_destroy(SELF);
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59 }
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61 void PyThread_exit_thread(void)
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62 {
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63 do_PyThread_exit_thread(0);
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64 }
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66 void PyThread__exit_thread(void)
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67 {
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68 do_PyThread_exit_thread(1);
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69 }
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71 #ifndef NO_EXIT_PROG
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72 static void do_PyThread_exit_prog(int status, int no_cleanup)
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73 {
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74 dprintf(("PyThread_exit_prog(%d) called\n", status));
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75 if (!initialized)
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76 if (no_cleanup)
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77 _exit(status);
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78 else
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79 exit(status);
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80 pod_exit(status);
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81 }
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82
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83 void PyThread_exit_prog(int status)
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84 {
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85 do_PyThread_exit_prog(status, 0);
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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, 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 PyThread_allocate_lock(void)
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98 {
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99 struct lock *lock;
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100 extern char *malloc(size_t);
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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 = (struct lock *) malloc(sizeof(struct lock));
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107 lock->lock_locked = 0;
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108 (void) mon_create(&lock->lock_monitor);
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109 (void) cv_create(&lock->lock_condvar, lock->lock_monitor);
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110 dprintf(("PyThread_allocate_lock() -> %p\n", lock));
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111 return (PyThread_type_lock) lock;
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112 }
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113
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114 void PyThread_free_lock(PyThread_type_lock lock)
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115 {
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116 dprintf(("PyThread_free_lock(%p) called\n", lock));
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117 mon_destroy(((struct lock *) lock)->lock_monitor);
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118 free((char *) lock);
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119 }
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120
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121 int PyThread_acquire_lock(PyThread_type_lock lock, int waitflag)
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122 {
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123 int success;
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124
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125 dprintf(("PyThread_acquire_lock(%p, %d) called\n", lock, waitflag));
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126 success = 0;
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127
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128 (void) mon_enter(((struct lock *) lock)->lock_monitor);
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129 if (waitflag)
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130 while (((struct lock *) lock)->lock_locked)
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131 cv_wait(((struct lock *) lock)->lock_condvar);
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132 if (!((struct lock *) lock)->lock_locked) {
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133 success = 1;
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134 ((struct lock *) lock)->lock_locked = 1;
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135 }
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136 cv_broadcast(((struct lock *) lock)->lock_condvar);
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137 mon_exit(((struct lock *) lock)->lock_monitor);
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138 dprintf(("PyThread_acquire_lock(%p, %d) -> %d\n", lock, waitflag, success));
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139 return success;
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140 }
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141
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142 void PyThread_release_lock(PyThread_type_lock lock)
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143 {
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144 dprintf(("PyThread_release_lock(%p) called\n", lock));
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145 (void) mon_enter(((struct lock *) lock)->lock_monitor);
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146 ((struct lock *) lock)->lock_locked = 0;
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147 cv_broadcast(((struct lock *) lock)->lock_condvar);
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148 mon_exit(((struct lock *) lock)->lock_monitor);
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149 }