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annotate Python/thread_pth.h @ 42309:bd6acfdb47d2

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Merged revisions 56301-56442 via svnmerge from svn+ssh://pythondev@svn.python.org/python/branches/p3yk ................ r56322 | kurt.kaiser | 2007-07-12 11:35:03 -0700 (Thu, 12 Jul 2007) | 2 lines Replace obscure code which was failing in py3k. ................ r56323 | kurt.kaiser | 2007-07-12 11:44:12 -0700 (Thu, 12 Jul 2007) | 3 lines 1. Remove new division option 2. Update IDLE version to 3.0x ................ r56327 | kurt.kaiser | 2007-07-12 12:20:20 -0700 (Thu, 12 Jul 2007) | 5 lines Fix another instance of this defect in Tkinter, and one in IDLE. Patch 1724999 by Ali Gholami Rudi -- avoid complaints about dict size change during iter in destroy call. ................ r56339 | georg.brandl | 2007-07-13 03:07:25 -0700 (Fri, 13 Jul 2007) | 2 lines Fix #1753310: regrtest -x doesn't work anymore ................ r56361 | kurt.kaiser | 2007-07-13 18:25:24 -0700 (Fri, 13 Jul 2007) | 2 lines convert a map() iterator to a list to get this working. ................ r56362 | kurt.kaiser | 2007-07-13 18:53:45 -0700 (Fri, 13 Jul 2007) | 2 lines Was modifying dict during iteration. ................ r56376 | collin.winter | 2007-07-14 11:56:19 -0700 (Sat, 14 Jul 2007) | 1 line Add an example of class decorators to test_grammar. ................ r56377 | collin.winter | 2007-07-14 12:00:17 -0700 (Sat, 14 Jul 2007) | 1 line Add a basic example of dictcomps to test_grammar. ................ r56413 | neal.norwitz | 2007-07-17 00:21:18 -0700 (Tue, 17 Jul 2007) | 149 lines Merged revisions 56202-56412 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r56204 | ronald.oussoren | 2007-07-08 23:02:21 -0700 (Sun, 08 Jul 2007) | 2 lines Patch 1693258: Fix for duplicate "preferences" menu-OS X ........ r56207 | ronald.oussoren | 2007-07-09 01:41:15 -0700 (Mon, 09 Jul 2007) | 4 lines Patch 1673122: be explicit about which libtool to use, to avoid name clashes when a users install GNU libtool early in his PATH ........ r56280 | georg.brandl | 2007-07-11 12:41:49 -0700 (Wed, 11 Jul 2007) | 2 lines Fix #1752132: wrong comment in opcode description. ........ r56293 | georg.brandl | 2007-07-12 01:05:45 -0700 (Thu, 12 Jul 2007) | 3 lines Patch #1752270, #1750931: complain if urllib2 add_handler called without handler. ........ r56296 | georg.brandl | 2007-07-12 01:11:29 -0700 (Thu, 12 Jul 2007) | 2 lines Patch #1739696: use code.co_code only if really necessary ........ r56298 | georg.brandl | 2007-07-12 01:38:00 -0700 (Thu, 12 Jul 2007) | 3 lines Patch #1673759: add a missing overflow check when formatting floats with %G. ........ r56302 | georg.brandl | 2007-07-12 02:06:41 -0700 (Thu, 12 Jul 2007) | 2 lines Patch #1731659: improve time.strptime docs. ........ r56304 | georg.brandl | 2007-07-12 02:24:04 -0700 (Thu, 12 Jul 2007) | 2 lines Patch #1731169: clean up expected skips list. ........ r56306 | georg.brandl | 2007-07-12 02:37:49 -0700 (Thu, 12 Jul 2007) | 3 lines Bug #1637365: add subsection about "__name__ == __main__" to the Python tutorial. ........ r56308 | georg.brandl | 2007-07-12 02:59:22 -0700 (Thu, 12 Jul 2007) | 5 lines Patch #1675424: Added tests for uncovered code in the zipfile module. The KeyError raised by Zipfile.getinfo for nonexistent names now has a descriptive message. ........ r56340 | facundo.batista | 2007-07-13 03:43:44 -0700 (Fri, 13 Jul 2007) | 6 lines Added tests for basic behavior of DateTime, Binary, and Fault classes and the escape function. Check that marshalling recursive sequences & dicts raises TypeError. Check that marshalling out-of-range ints raises OverflowError [Alan McIntyre - GSoC] ........ r56345 | raymond.hettinger | 2007-07-13 05:09:41 -0700 (Fri, 13 Jul 2007) | 1 line Correct the docs for takewhile(). Improve the recipe for nth(). Should be backported ........ r56348 | thomas.heller | 2007-07-13 06:59:39 -0700 (Fri, 13 Jul 2007) | 4 lines Repair COMError. Since exceptions are new style classes now, setting the methods and docstring after the type creation does not work, they must be in the dictionary before creating the type. ........ r56349 | thomas.heller | 2007-07-13 07:18:06 -0700 (Fri, 13 Jul 2007) | 1 line Add tests for _ctypes.COMError. ........ r56350 | thomas.heller | 2007-07-13 09:50:43 -0700 (Fri, 13 Jul 2007) | 4 lines Do not try to load the GLUT library in the ctypes tests. This test adds little value, but has a large problem on OS X, as explained in SF# 1581906. ........ r56352 | thomas.heller | 2007-07-13 10:12:23 -0700 (Fri, 13 Jul 2007) | 3 lines Fix for SF# 1701409: segfault in c_char_p of ctypes. The repr output of c_char_p and c_wchar_p has changed as a sideeffect. ........ r56355 | thomas.heller | 2007-07-13 10:46:54 -0700 (Fri, 13 Jul 2007) | 3 lines Fix for SF# 1649098: avoid zero-sized array declaration in structure. ........ r56357 | thomas.heller | 2007-07-13 12:51:55 -0700 (Fri, 13 Jul 2007) | 3 lines PyType_stgdict() returns a borrowed reference which must not be Py_DECREF'd. ........ r56360 | barry.warsaw | 2007-07-13 15:12:58 -0700 (Fri, 13 Jul 2007) | 10 lines In response to this SF bug: [ 1752723 ] email.message_from_string: initial line gets discarded I added a test to assert that when the first line of text passed to message_from_string() contains a leading space, the message ends up with the appropriate FirstHeaderLineIsContinuationDefect on its defects list. The bug is invalid. ........ r56364 | georg.brandl | 2007-07-14 10:12:23 -0700 (Sat, 14 Jul 2007) | 2 lines Bug #1753406: missing \versionadded for subprocess.check_call. ........ r56366 | georg.brandl | 2007-07-14 10:32:41 -0700 (Sat, 14 Jul 2007) | 2 lines Clarify webbrowser.open description. ........ r56380 | andrew.kuchling | 2007-07-14 13:58:21 -0700 (Sat, 14 Jul 2007) | 1 line Typo fix ........ r56382 | andrew.kuchling | 2007-07-14 14:56:19 -0700 (Sat, 14 Jul 2007) | 7 lines Avoid exception if there's a stray directory inside a Maildir folder. The Maildir specification doesn't seem to say anything about this situation, and it can happen if you're keeping a Maildir mailbox in Subversion (.svn directories) or some similar system. The patch just ignores directories in the cur/, new/, tmp/ folders. ........ r56392 | facundo.batista | 2007-07-14 15:41:45 -0700 (Sat, 14 Jul 2007) | 6 lines First version. Includes tests for helper functions: read, write, _exception, readwrite, closeall, compact_traceback; and for classes dispatcher, dispatcher_with_send, and file_wrapper. [Alan McIntyre - GSoC] ........ r56399 | facundo.batista | 2007-07-15 13:30:39 -0700 (Sun, 15 Jul 2007) | 5 lines Changed the used port and commented out some tests that uses a non documented function that appers to uses resources not present in Windows. ........ r56412 | facundo.batista | 2007-07-16 19:19:39 -0700 (Mon, 16 Jul 2007) | 6 lines Prevent asyncore.dispatcher tests from hanging by adding loop counters to server & client, and by adding asyncore.close_all calls in tearDown. Also choose correct expected logging results based on the value of __debug__ [Alan McIntyre - GSoC] ........ ................ r56442 | guido.van.rossum | 2007-07-18 10:26:38 -0700 (Wed, 18 Jul 2007) | 14 lines Merged revisions 56413-56441 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r56439 | georg.brandl | 2007-07-17 23:37:55 -0700 (Tue, 17 Jul 2007) | 2 lines Use "Unix" as platform name, not "UNIX". ........ r56441 | guido.van.rossum | 2007-07-18 10:19:14 -0700 (Wed, 18 Jul 2007) | 3 lines SF patch# 1755885 by Kurt Kaiser: show location of Unicode escape errors. (Slightly tweaked for style and refcounts.) ........ ................
author Guido van Rossum <guido@python.org>
date Wed, 18 Jul 2007 18:15:48 +0000
parents 1a817694ecbd
children e38335d4df91 df5719c298db
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1
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2 /* GNU pth threads interface
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3 http://www.gnu.org/software/pth
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4 2000-05-03 Andy Dustman <andy@dustman.net>
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5
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6 Adapted from Posix threads interface
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7 12 May 1997 -- david arnold <davida@pobox.com>
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8 */
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9
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10 #include <stdlib.h>
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11 #include <string.h>
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12 #include <pth.h>
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13
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14 /* A pth mutex isn't sufficient to model the Python lock type
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15 * because pth mutexes can be acquired multiple times by the
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16 * same thread.
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17 *
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18 * The pth_lock struct implements a Python lock as a "locked?" bit
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19 * and a <condition, mutex> pair. In general, if the bit can be acquired
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20 * instantly, it is, else the pair is used to block the thread until the
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21 * bit is cleared.
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22 */
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23
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24 typedef struct {
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25 char locked; /* 0=unlocked, 1=locked */
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26 /* a <cond, mutex> pair to handle an acquire of a locked lock */
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27 pth_cond_t lock_released;
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28 pth_mutex_t mut;
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29 } pth_lock;
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31 #define CHECK_STATUS(name) if (status == -1) { printf("%d ", status); perror(name); error = 1; }
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32
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33 pth_attr_t PyThread_attr;
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35 /*
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36 * Initialization.
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37 */
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38
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39 static void PyThread__init_thread(void)
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40 {
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41 pth_init();
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42 PyThread_attr = pth_attr_new();
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43 pth_attr_set(PyThread_attr, PTH_ATTR_STACK_SIZE, 1<<18);
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44 pth_attr_set(PyThread_attr, PTH_ATTR_JOINABLE, FALSE);
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45 }
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47 /*
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48 * Thread support.
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49 */
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51
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52 long PyThread_start_new_thread(void (*func)(void *), void *arg)
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53 {
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54 pth_t th;
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55 dprintf(("PyThread_start_new_thread called\n"));
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56 if (!initialized)
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57 PyThread_init_thread();
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58
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59 th = pth_spawn(PyThread_attr,
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60 (void* (*)(void *))func,
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61 (void *)arg
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62 );
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64 return th;
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65 }
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67 long PyThread_get_thread_ident(void)
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68 {
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69 volatile pth_t threadid;
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70 if (!initialized)
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71 PyThread_init_thread();
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72 /* Jump through some hoops for Alpha OSF/1 */
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73 threadid = pth_self();
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74 return (long) *(long *) &threadid;
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75 }
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77 static void do_PyThread_exit_thread(int no_cleanup)
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78 {
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79 dprintf(("PyThread_exit_thread called\n"));
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80 if (!initialized) {
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81 if (no_cleanup)
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82 _exit(0);
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83 else
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84 exit(0);
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85 }
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86 }
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87
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88 void PyThread_exit_thread(void)
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89 {
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90 do_PyThread_exit_thread(0);
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91 }
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93 void PyThread__exit_thread(void)
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94 {
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95 do_PyThread_exit_thread(1);
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96 }
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97
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98 #ifndef NO_EXIT_PROG
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99 static void do_PyThread_exit_prog(int status, int no_cleanup)
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100 {
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101 dprintf(("PyThread_exit_prog(%d) called\n", status));
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102 if (!initialized)
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103 if (no_cleanup)
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104 _exit(status);
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105 else
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106 exit(status);
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107 }
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108
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109 void PyThread_exit_prog(int status)
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110 {
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111 do_PyThread_exit_prog(status, 0);
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112 }
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113
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114 void PyThread__exit_prog(int status)
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115 {
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116 do_PyThread_exit_prog(status, 1);
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117 }
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118 #endif /* NO_EXIT_PROG */
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119
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120 /*
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121 * Lock support.
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122 */
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123 PyThread_type_lock PyThread_allocate_lock(void)
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124 {
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125 pth_lock *lock;
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126 int status, error = 0;
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127
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128 dprintf(("PyThread_allocate_lock called\n"));
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129 if (!initialized)
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130 PyThread_init_thread();
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131
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132 lock = (pth_lock *) malloc(sizeof(pth_lock));
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133 memset((void *)lock, '\0', sizeof(pth_lock));
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134 if (lock) {
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135 lock->locked = 0;
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136 status = pth_mutex_init(&lock->mut);
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137 CHECK_STATUS("pth_mutex_init");
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138 status = pth_cond_init(&lock->lock_released);
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139 CHECK_STATUS("pth_cond_init");
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140 if (error) {
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141 free((void *)lock);
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142 lock = NULL;
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143 }
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144 }
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145 dprintf(("PyThread_allocate_lock() -> %p\n", lock));
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146 return (PyThread_type_lock) lock;
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147 }
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148
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149 void PyThread_free_lock(PyThread_type_lock lock)
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150 {
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151 pth_lock *thelock = (pth_lock *)lock;
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152
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153 dprintf(("PyThread_free_lock(%p) called\n", lock));
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154
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155 free((void *)thelock);
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156 }
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157
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158 int PyThread_acquire_lock(PyThread_type_lock lock, int waitflag)
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159 {
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160 int success;
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161 pth_lock *thelock = (pth_lock *)lock;
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162 int status, error = 0;
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163
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164 dprintf(("PyThread_acquire_lock(%p, %d) called\n", lock, waitflag));
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165
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166 status = pth_mutex_acquire(&thelock->mut, !waitflag, NULL);
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167 CHECK_STATUS("pth_mutex_acquire[1]");
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168 success = thelock->locked == 0;
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169 if (success) thelock->locked = 1;
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170 status = pth_mutex_release( &thelock->mut );
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171 CHECK_STATUS("pth_mutex_release[1]");
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172
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173 if ( !success && waitflag ) {
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174 /* continue trying until we get the lock */
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175
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176 /* mut must be locked by me -- part of the condition
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177 * protocol */
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178 status = pth_mutex_acquire( &thelock->mut, !waitflag, NULL );
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179 CHECK_STATUS("pth_mutex_acquire[2]");
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180 while ( thelock->locked ) {
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181 status = pth_cond_await(&thelock->lock_released,
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182 &thelock->mut, NULL);
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183 CHECK_STATUS("pth_cond_await");
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184 }
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185 thelock->locked = 1;
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186 status = pth_mutex_release( &thelock->mut );
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187 CHECK_STATUS("pth_mutex_release[2]");
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188 success = 1;
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189 }
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190 if (error) success = 0;
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191 dprintf(("PyThread_acquire_lock(%p, %d) -> %d\n", lock, waitflag, success));
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192 return success;
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193 }
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194
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195 void PyThread_release_lock(PyThread_type_lock lock)
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196 {
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197 pth_lock *thelock = (pth_lock *)lock;
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198 int status, error = 0;
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199
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200 dprintf(("PyThread_release_lock(%p) called\n", lock));
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201
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202 status = pth_mutex_acquire( &thelock->mut, 0, NULL );
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203 CHECK_STATUS("pth_mutex_acquire[3]");
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204
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205 thelock->locked = 0;
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206
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207 status = pth_mutex_release( &thelock->mut );
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208 CHECK_STATUS("pth_mutex_release[3]");
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209
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210 /* wake up someone (anyone, if any) waiting on the lock */
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211 status = pth_cond_notify( &thelock->lock_released, 0 );
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212 CHECK_STATUS("pth_cond_notify");
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213 }