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annotate Python/thread_pth.h @ 43292:876b7ef4775d

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Merged revisions 57778-58052 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r57820 | georg.brandl | 2007-08-31 08:59:27 +0200 (Fri, 31 Aug 2007) | 2 lines Document new shorthand notation for index entries. ........ r57827 | georg.brandl | 2007-08-31 10:47:51 +0200 (Fri, 31 Aug 2007) | 2 lines Fix subitem markup. ........ r57833 | martin.v.loewis | 2007-08-31 12:01:07 +0200 (Fri, 31 Aug 2007) | 1 line Mark registry components as 64-bit on Win64. ........ r57854 | bill.janssen | 2007-08-31 21:02:23 +0200 (Fri, 31 Aug 2007) | 1 line deprecate use of FakeSocket ........ r57855 | bill.janssen | 2007-08-31 21:02:46 +0200 (Fri, 31 Aug 2007) | 1 line remove mentions of socket.ssl in comments ........ r57856 | bill.janssen | 2007-08-31 21:03:31 +0200 (Fri, 31 Aug 2007) | 1 line remove use of non-existent SSLFakeSocket in apparently untested code ........ r57859 | martin.v.loewis | 2007-09-01 08:36:03 +0200 (Sat, 01 Sep 2007) | 3 lines Bug #1737210: Change Manufacturer of Windows installer to PSF. Will backport to 2.5. ........ r57865 | georg.brandl | 2007-09-01 09:51:24 +0200 (Sat, 01 Sep 2007) | 2 lines Fix RST link (backport from Py3k). ........ r57876 | georg.brandl | 2007-09-01 17:49:49 +0200 (Sat, 01 Sep 2007) | 2 lines Document sets' ">" and "<" operations (backport from py3k). ........ r57878 | skip.montanaro | 2007-09-01 19:40:03 +0200 (Sat, 01 Sep 2007) | 4 lines Added a note and examples to explain that re.split does not split on an empty pattern match. (issue 852532). ........ r57879 | walter.doerwald | 2007-09-01 20:18:09 +0200 (Sat, 01 Sep 2007) | 2 lines Fix wrong function names. ........ r57880 | walter.doerwald | 2007-09-01 20:34:05 +0200 (Sat, 01 Sep 2007) | 2 lines Fix typo. ........ r57889 | andrew.kuchling | 2007-09-01 22:31:59 +0200 (Sat, 01 Sep 2007) | 1 line Markup fix ........ r57892 | andrew.kuchling | 2007-09-01 22:43:36 +0200 (Sat, 01 Sep 2007) | 1 line Add various items ........ r57895 | andrew.kuchling | 2007-09-01 23:17:58 +0200 (Sat, 01 Sep 2007) | 1 line Wording change ........ r57896 | andrew.kuchling | 2007-09-01 23:18:31 +0200 (Sat, 01 Sep 2007) | 1 line Add more items ........ r57904 | ronald.oussoren | 2007-09-02 11:46:07 +0200 (Sun, 02 Sep 2007) | 3 lines Macosx: this patch ensures that the value of MACOSX_DEPLOYMENT_TARGET used by the Makefile is also used at configure-time. ........ r57925 | georg.brandl | 2007-09-03 09:16:46 +0200 (Mon, 03 Sep 2007) | 2 lines Fix #883466: don't allow Unicode as arguments to quopri and uu codecs. ........ r57936 | matthias.klose | 2007-09-04 01:33:04 +0200 (Tue, 04 Sep 2007) | 2 lines - Added support for linking the bsddb module against BerkeleyDB 4.6.x. ........ r57954 | mark.summerfield | 2007-09-04 10:16:15 +0200 (Tue, 04 Sep 2007) | 3 lines Added cross-references plus a note about dict & list shallow copying. ........ r57958 | martin.v.loewis | 2007-09-04 11:51:57 +0200 (Tue, 04 Sep 2007) | 3 lines Document that we rely on the OS to release the crypto context. Fixes #1626801. ........ r57960 | martin.v.loewis | 2007-09-04 15:13:14 +0200 (Tue, 04 Sep 2007) | 3 lines Patch #1388440: Add set_completion_display_matches_hook and get_completion_type to readline. ........ r57961 | martin.v.loewis | 2007-09-04 16:19:28 +0200 (Tue, 04 Sep 2007) | 3 lines Patch #1031213: Decode source line in SyntaxErrors back to its original source encoding. Will backport to 2.5. ........ r57972 | matthias.klose | 2007-09-04 20:17:36 +0200 (Tue, 04 Sep 2007) | 3 lines - Makefile.pre.in(buildbottest): Run an optional script pybuildbot.identify to include some information about the build environment. ........ r57973 | matthias.klose | 2007-09-04 21:05:38 +0200 (Tue, 04 Sep 2007) | 2 lines - Makefile.pre.in(buildbottest): Remove whitespace at eol. ........ r57975 | matthias.klose | 2007-09-04 22:46:02 +0200 (Tue, 04 Sep 2007) | 2 lines - Fix libffi configure for hppa*-*-linux* | parisc*-*-linux*. ........ r57980 | bill.janssen | 2007-09-05 02:46:27 +0200 (Wed, 05 Sep 2007) | 1 line SSL certificate distinguished names should be represented by tuples ........ r57985 | martin.v.loewis | 2007-09-05 08:39:17 +0200 (Wed, 05 Sep 2007) | 3 lines Patch #1105: Explain that one needs to build the solution to get dependencies right. ........ r57987 | armin.rigo | 2007-09-05 09:51:21 +0200 (Wed, 05 Sep 2007) | 4 lines PyDict_GetItem() returns a borrowed reference. There are probably a number of places that are open to attacks such as the following one, in bltinmodule.c:min_max(). ........ r57991 | martin.v.loewis | 2007-09-05 13:47:34 +0200 (Wed, 05 Sep 2007) | 3 lines Patch #786737: Allow building in a tree of symlinks pointing to a readonly source. ........ r57993 | georg.brandl | 2007-09-05 15:36:44 +0200 (Wed, 05 Sep 2007) | 2 lines Backport from Py3k: Bug #1684991: explain lookup semantics for __special__ methods (new-style classes only). ........ r58004 | armin.rigo | 2007-09-06 10:30:51 +0200 (Thu, 06 Sep 2007) | 4 lines Patch #1733973 by peaker: ptrace_enter_call() assumes no exception is currently set. This assumption is broken when throwing into a generator. ........ r58006 | armin.rigo | 2007-09-06 11:30:38 +0200 (Thu, 06 Sep 2007) | 4 lines PyDict_GetItem() returns a borrowed reference. This attack is against ceval.c:IMPORT_NAME, which calls an object (__builtin__.__import__) without holding a reference to it. ........ r58013 | georg.brandl | 2007-09-06 16:49:56 +0200 (Thu, 06 Sep 2007) | 2 lines Backport from 3k: #1116: fix reference to old filename. ........ r58021 | thomas.heller | 2007-09-06 22:26:20 +0200 (Thu, 06 Sep 2007) | 1 line Fix typo: c_float represents to C float type. ........ r58022 | skip.montanaro | 2007-09-07 00:29:06 +0200 (Fri, 07 Sep 2007) | 3 lines If this is correct for py3k branch and it's already in the release25-maint branch, seems like it ought to be on the trunk as well. ........ r58023 | gregory.p.smith | 2007-09-07 00:59:59 +0200 (Fri, 07 Sep 2007) | 4 lines Apply the fix from Issue1112 to make this test more robust and keep windows happy. ........ r58031 | brett.cannon | 2007-09-07 05:17:50 +0200 (Fri, 07 Sep 2007) | 4 lines Make uuid1 and uuid4 tests conditional on whether ctypes can be imported; implementation of either function depends on ctypes but uuid as a whole does not. ........ r58032 | brett.cannon | 2007-09-07 06:18:30 +0200 (Fri, 07 Sep 2007) | 6 lines Fix a crasher where Python code managed to infinitely recurse in C code without ever going back out to Python code in PyObject_Call(). Required introducing a static RuntimeError instance so that normalizing an exception there is no reliance on a recursive call that would put the exception system over the recursion check itself. ........ r58034 | thomas.heller | 2007-09-07 08:32:17 +0200 (Fri, 07 Sep 2007) | 1 line Add a 'c_longdouble' type to the ctypes module. ........ r58035 | thomas.heller | 2007-09-07 11:30:40 +0200 (Fri, 07 Sep 2007) | 1 line Remove unneeded #include. ........ r58036 | thomas.heller | 2007-09-07 11:33:24 +0200 (Fri, 07 Sep 2007) | 6 lines Backport from py3k branch: Add a workaround for a strange bug on win64, when _ctypes is compiled with the SDK compiler. This should fix the failing Lib\ctypes\test\test_as_parameter.py test. ........ r58037 | georg.brandl | 2007-09-07 16:14:40 +0200 (Fri, 07 Sep 2007) | 2 lines Fix a wrong indentation for sublists. ........ r58043 | georg.brandl | 2007-09-07 22:10:49 +0200 (Fri, 07 Sep 2007) | 2 lines #1095: ln -f doesn't work portably, fix in Makefile. ........ r58049 | skip.montanaro | 2007-09-08 02:34:17 +0200 (Sat, 08 Sep 2007) | 1 line be explicit about the actual location of the missing file ........
author Thomas Wouters <thomas@python.org>
date Sat, 08 Sep 2007 17:39:28 +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 }