annotate Python/thread_nt.h @ 45852:30c4e1ca8421

Merged revisions 61431,61433-61436,61439,61444,61449-61450,61453,61458,61465,61468,61471-61474,61480,61483-61484,61488,61495-61496,61498,61503-61504,61507,61509-61510,61515-61518 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r61431 | vinay.sajip | 2008-03-16 22:35:58 +0100 (So, 16 Mär 2008) | 1 line Clarified documentation on use of shutdown(). ........ r61433 | mark.summerfield | 2008-03-17 09:28:15 +0100 (Mo, 17 Mär 2008) | 5 lines Added a footnote to each pointing out that for XML output if an encoding string is given it should conform to the appropriate XML standards---for example, "UTF-8" is okay, but "UTF8" is not. ........ r61434 | eric.smith | 2008-03-17 12:01:01 +0100 (Mo, 17 Mär 2008) | 7 lines Issue 2264: empty float presentation type needs to have at least one digit past the decimal point. Added "Z" format_char to PyOS_ascii_formatd to support empty float presentation type. Renamed buf_size in PyOS_ascii_formatd to more accurately reflect it's meaning. Modified format.__float__ to use the new "Z" format as the default. Added test cases. ........ r61435 | eric.smith | 2008-03-17 13:14:29 +0100 (Mo, 17 Mär 2008) | 2 lines Reformated lines > 79 chars. Deleted unused macro ISXDIGIT. ........ r61436 | jeffrey.yasskin | 2008-03-17 15:40:53 +0100 (Mo, 17 Mär 2008) | 13 lines Allow Gnu gcc's to build python on OSX by removing -Wno-long-double, -no-cpp-precomp, and -mno-fused-madd from configure. * r22183 added -no-cpp-precomp, which http://gcc.gnu.org/ml/gcc/2005-12/msg00368.html claims hasn't been needed since gcc-3.1. * r25607 added -Wno-long-double to avoid a warning in Include/objimpl.h (issue 525481). The long double is still there, but OSX 10.4's gcc no longer warns about it. * r33666 fixed issue 775892 on OSX 10.3 by adding -mno-fused-madd, which changed the sign of some float 0s. Tim Peters said it wasn't a real issue anyway, and it no longer causes test failures. Fixes issue #1779871. ........ r61439 | martin.v.loewis | 2008-03-17 17:31:57 +0100 (Mo, 17 Mär 2008) | 2 lines Add Trent Nelson. ........ r61444 | travis.oliphant | 2008-03-17 18:36:12 +0100 (Mo, 17 Mär 2008) | 1 line Add necessary headers to back-port new buffer protocol to Python 2.6 ........ r61449 | gregory.p.smith | 2008-03-17 19:48:05 +0100 (Mo, 17 Mär 2008) | 8 lines Force zlib.crc32 and zlib.adler32 to return a signed integer on all platforms regardless of the native sizeof(long) used in the integer object. This somewhat odd behavior of returning a signed is maintained in 2.x for compatibility reasons of always returning an integer rather than a long object. Fixes Issue1202 for Python 2.6 ........ r61450 | neal.norwitz | 2008-03-17 20:02:45 +0100 (Mo, 17 Mär 2008) | 3 lines Use a buffer large enough to ensure we don't overrun, even if the value is outside the range we expect. ........ r61453 | steven.bethard | 2008-03-17 20:33:11 +0100 (Mo, 17 Mär 2008) | 1 line Document unicode.isnumeric() and unicode.isdecimal() (issue2326) ........ r61458 | neal.norwitz | 2008-03-17 21:22:43 +0100 (Mo, 17 Mär 2008) | 5 lines Issue 2321: reduce memory usage (increase the memory that is returned to the system) by using pymalloc for the data of unicode objects. Will backport. ........ r61465 | martin.v.loewis | 2008-03-17 22:55:30 +0100 (Mo, 17 Mär 2008) | 2 lines Add David Wolever. ........ r61468 | gregory.p.smith | 2008-03-18 01:20:01 +0100 (Di, 18 Mär 2008) | 3 lines Fix the IOError message text when opening a file with an invalid filename. Error reported by Ilan Schnell. ........ r61471 | brett.cannon | 2008-03-18 02:00:07 +0100 (Di, 18 Mär 2008) | 2 lines Convert test_strftime, test_getargs, and test_pep247 to use unittest. ........ r61472 | jeffrey.yasskin | 2008-03-18 02:09:59 +0100 (Di, 18 Mär 2008) | 2 lines Fix build on platforms that don't have intptr_t. Patch by Joseph Armbruster. ........ r61473 | brett.cannon | 2008-03-18 02:50:25 +0100 (Di, 18 Mär 2008) | 2 lines Convert test_dummy_threading and test_dbm to unittest. ........ r61474 | brett.cannon | 2008-03-18 02:58:56 +0100 (Di, 18 Mär 2008) | 2 lines Move test_extcall to doctest. ........ r61480 | brett.cannon | 2008-03-18 04:46:22 +0100 (Di, 18 Mär 2008) | 2 lines test_errno was a no-op test; now it actually tests things and uses unittest. ........ r61483 | brett.cannon | 2008-03-18 05:09:00 +0100 (Di, 18 Mär 2008) | 3 lines Remove our implementation of memmove() and strerror(); both are in the C89 standard library. ........ r61484 | brett.cannon | 2008-03-18 05:16:06 +0100 (Di, 18 Mär 2008) | 2 lines The output directory for tests that compare against stdout is now gone! ........ r61488 | jeffrey.yasskin | 2008-03-18 05:29:35 +0100 (Di, 18 Mär 2008) | 2 lines Block the "socket.ssl() is deprecated" warning from test_socket_ssl. ........ r61495 | jeffrey.yasskin | 2008-03-18 05:56:06 +0100 (Di, 18 Mär 2008) | 4 lines Speed test_thread up from 51.328s to 0.081s by reducing its sleep times. We still sleep at all to make it likely that all threads are active at the same time. ........ r61496 | jeffrey.yasskin | 2008-03-18 06:12:41 +0100 (Di, 18 Mär 2008) | 4 lines Speed up test_dict by about 10x by only checking selected dict literal sizes, instead of every integer from 0 to 400. Exhaustive testing wastes time without providing enough more assurance that the code is correct. ........ r61498 | neal.norwitz | 2008-03-18 06:20:29 +0100 (Di, 18 Mär 2008) | 1 line Try increasing the timeout to reduce the flakiness of this test. ........ r61503 | brett.cannon | 2008-03-18 06:43:04 +0100 (Di, 18 Mär 2008) | 2 lines Improve the error message for a test that failed on the S-390 Debian buildbot. ........ r61504 | jeffrey.yasskin | 2008-03-18 06:45:40 +0100 (Di, 18 Mär 2008) | 3 lines Add a -S/--slow flag to regrtest to have it print the 10 slowest tests with their times. ........ r61507 | neal.norwitz | 2008-03-18 07:03:46 +0100 (Di, 18 Mär 2008) | 1 line Add some info to the failure messages ........ r61509 | trent.nelson | 2008-03-18 08:02:12 +0100 (Di, 18 Mär 2008) | 1 line Issue 2286: bump up the stack size of the 64-bit debug python_d.exe to 2100000. The default value of 200000 causes a stack overflow at 1965 iterations of r_object() in marshal.c, 35 iterations before the 2000 limit enforced by MAX_MARSHAL_STACK_DEPTH. ........ r61510 | trent.nelson | 2008-03-18 08:32:47 +0100 (Di, 18 Mär 2008) | 5 lines The behaviour of winsound.Beep() seems to differ between different versions of Windows when there's either: a) no sound card entirely b) legacy beep driver has been disabled c) the legacy beep driver has been uninstalled Sometimes RuntimeErrors are raised, sometimes they're not. If _have_soundcard() returns False, don't expect winsound.Beep() to raise a RuntimeError, as this clearly isn't the case, as demonstrated by the various Win32 XP buildbots. ........ r61515 | martin.v.loewis | 2008-03-18 13:20:15 +0100 (Di, 18 Mär 2008) | 2 lines norwitz-amd64 (gentoo) has EREMOTEIO. ........ r61516 | martin.v.loewis | 2008-03-18 13:45:37 +0100 (Di, 18 Mär 2008) | 2 lines Add more Linux error codes. ........ r61517 | martin.v.loewis | 2008-03-18 14:05:03 +0100 (Di, 18 Mär 2008) | 2 lines Add WSA errors. ........ r61518 | martin.v.loewis | 2008-03-18 14:16:05 +0100 (Di, 18 Mär 2008) | 2 lines Note that the stderr output of the test is intentional. ........
author Christian Heimes <christian@cheimes.de>
date Tue, 18 Mar 2008 15:15:01 +0000
parents 00c02c4488ce
children 2b2707ff8bb7
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2 /* This code implemented by Dag.Gruneau@elsa.preseco.comm.se */
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3 /* Fast NonRecursiveMutex support by Yakov Markovitch, markovitch@iso.ru */
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4 /* Eliminated some memory leaks, gsw@agere.com */
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6 #include <windows.h>
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7 #include <limits.h>
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8 #ifdef HAVE_PROCESS_H
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9 #include <process.h>
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10 #endif
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12 typedef struct NRMUTEX {
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13 LONG owned ;
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14 DWORD thread_id ;
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15 HANDLE hevent ;
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16 } NRMUTEX, *PNRMUTEX ;
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17
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19 BOOL
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20 InitializeNonRecursiveMutex(PNRMUTEX mutex)
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21 {
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22 mutex->owned = -1 ; /* No threads have entered NonRecursiveMutex */
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23 mutex->thread_id = 0 ;
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24 mutex->hevent = CreateEvent(NULL, FALSE, FALSE, NULL) ;
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25 return mutex->hevent != NULL ; /* TRUE if the mutex is created */
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26 }
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27
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28 VOID
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29 DeleteNonRecursiveMutex(PNRMUTEX mutex)
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30 {
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31 /* No in-use check */
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32 CloseHandle(mutex->hevent) ;
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33 mutex->hevent = NULL ; /* Just in case */
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34 }
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35
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36 DWORD
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37 EnterNonRecursiveMutex(PNRMUTEX mutex, BOOL wait)
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38 {
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39 /* Assume that the thread waits successfully */
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40 DWORD ret ;
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41
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42 /* InterlockedIncrement(&mutex->owned) == 0 means that no thread currently owns the mutex */
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43 if (!wait)
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44 {
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45 if (InterlockedCompareExchange(&mutex->owned, 0, -1) != -1)
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46 return WAIT_TIMEOUT ;
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47 ret = WAIT_OBJECT_0 ;
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48 }
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49 else
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50 ret = InterlockedIncrement(&mutex->owned) ?
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51 /* Some thread owns the mutex, let's wait... */
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52 WaitForSingleObject(mutex->hevent, INFINITE) : WAIT_OBJECT_0 ;
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53
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54 mutex->thread_id = GetCurrentThreadId() ; /* We own it */
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55 return ret ;
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56 }
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57
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58 BOOL
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59 LeaveNonRecursiveMutex(PNRMUTEX mutex)
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60 {
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61 /* We don't own the mutex */
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62 mutex->thread_id = 0 ;
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63 return
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64 InterlockedDecrement(&mutex->owned) < 0 ||
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65 SetEvent(mutex->hevent) ; /* Other threads are waiting, wake one on them up */
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66 }
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67
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68 PNRMUTEX
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69 AllocNonRecursiveMutex(void)
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70 {
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71 PNRMUTEX mutex = (PNRMUTEX)malloc(sizeof(NRMUTEX)) ;
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72 if (mutex && !InitializeNonRecursiveMutex(mutex))
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73 {
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74 free(mutex) ;
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75 mutex = NULL ;
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76 }
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77 return mutex ;
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78 }
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79
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80 void
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81 FreeNonRecursiveMutex(PNRMUTEX mutex)
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82 {
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83 if (mutex)
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84 {
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85 DeleteNonRecursiveMutex(mutex) ;
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86 free(mutex) ;
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87 }
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88 }
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89
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90 long PyThread_get_thread_ident(void);
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91
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92 /*
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93 * Initialization of the C package, should not be needed.
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94 */
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95 static void
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96 PyThread__init_thread(void)
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97 {
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98 }
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99
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100 /*
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101 * Thread support.
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102 */
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103
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104 typedef struct {
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105 void (*func)(void*);
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106 void *arg;
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107 long id;
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108 HANDLE done;
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109 } callobj;
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110
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111 static int
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112 bootstrap(void *call)
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113 {
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114 callobj *obj = (callobj*)call;
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115 /* copy callobj since other thread might free it before we're done */
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116 void (*func)(void*) = obj->func;
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117 void *arg = obj->arg;
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118
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119 obj->id = PyThread_get_thread_ident();
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120 ReleaseSemaphore(obj->done, 1, NULL);
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121 func(arg);
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122 return 0;
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123 }
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124
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125 long
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126 PyThread_start_new_thread(void (*func)(void *), void *arg)
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127 {
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128 Py_uintptr_t rv;
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129 callobj obj;
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130
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131 dprintf(("%ld: PyThread_start_new_thread called\n",
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132 PyThread_get_thread_ident()));
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133 if (!initialized)
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134 PyThread_init_thread();
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135
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136 obj.id = -1; /* guilty until proved innocent */
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137 obj.func = func;
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138 obj.arg = arg;
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139 obj.done = CreateSemaphore(NULL, 0, 1, NULL);
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140 if (obj.done == NULL)
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141 return -1;
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142
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143 rv = _beginthread(bootstrap,
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144 Py_SAFE_DOWNCAST(_pythread_stacksize,
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145 Py_ssize_t, int),
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146 &obj);
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147 if (rv == (Py_uintptr_t)-1) {
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148 /* I've seen errno == EAGAIN here, which means "there are
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149 * too many threads".
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150 */
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151 dprintf(("%ld: PyThread_start_new_thread failed: %p errno %d\n",
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152 PyThread_get_thread_ident(), (void*)rv, errno));
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153 obj.id = -1;
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154 }
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155 else {
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156 dprintf(("%ld: PyThread_start_new_thread succeeded: %p\n",
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157 PyThread_get_thread_ident(), (void*)rv));
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158 /* wait for thread to initialize, so we can get its id */
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159 WaitForSingleObject(obj.done, INFINITE);
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160 assert(obj.id != -1);
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161 }
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162 CloseHandle((HANDLE)obj.done);
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163 return obj.id;
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164 }
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165
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166 /*
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167 * Return the thread Id instead of an handle. The Id is said to uniquely identify the
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168 * thread in the system
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169 */
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170 long
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171 PyThread_get_thread_ident(void)
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172 {
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173 if (!initialized)
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174 PyThread_init_thread();
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175
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176 return GetCurrentThreadId();
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177 }
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178
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179 static void
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180 do_PyThread_exit_thread(int no_cleanup)
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181 {
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182 dprintf(("%ld: PyThread_exit_thread called\n", PyThread_get_thread_ident()));
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183 if (!initialized)
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184 if (no_cleanup)
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185 _exit(0);
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186 else
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187 exit(0);
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188 _endthread();
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189 }
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190
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191 void
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192 PyThread_exit_thread(void)
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193 {
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194 do_PyThread_exit_thread(0);
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195 }
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196
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197 void
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198 PyThread__exit_thread(void)
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199 {
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200 do_PyThread_exit_thread(1);
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201 }
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202
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203 #ifndef NO_EXIT_PROG
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204 static void
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205 do_PyThread_exit_prog(int status, int no_cleanup)
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206 {
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207 dprintf(("PyThread_exit_prog(%d) called\n", status));
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208 if (!initialized)
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209 if (no_cleanup)
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210 _exit(status);
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211 else
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212 exit(status);
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213 }
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214
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215 void
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216 PyThread_exit_prog(int status)
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217 {
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218 do_PyThread_exit_prog(status, 0);
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219 }
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220
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221 void
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222 PyThread__exit_prog(int status)
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223 {
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224 do_PyThread_exit_prog(status, 1);
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225 }
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226 #endif /* NO_EXIT_PROG */
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227
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228 /*
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229 * Lock support. It has too be implemented as semaphores.
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230 * I [Dag] tried to implement it with mutex but I could find a way to
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231 * tell whether a thread already own the lock or not.
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232 */
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233 PyThread_type_lock
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234 PyThread_allocate_lock(void)
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235 {
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236 PNRMUTEX aLock;
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237
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238 dprintf(("PyThread_allocate_lock called\n"));
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239 if (!initialized)
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240 PyThread_init_thread();
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241
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242 aLock = AllocNonRecursiveMutex() ;
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243
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244 dprintf(("%ld: PyThread_allocate_lock() -> %p\n", PyThread_get_thread_ident(), aLock));
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245
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246 return (PyThread_type_lock) aLock;
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247 }
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248
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249 void
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250 PyThread_free_lock(PyThread_type_lock aLock)
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251 {
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252 dprintf(("%ld: PyThread_free_lock(%p) called\n", PyThread_get_thread_ident(),aLock));
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253
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254 FreeNonRecursiveMutex(aLock) ;
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255 }
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256
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257 /*
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258 * Return 1 on success if the lock was acquired
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259 *
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260 * and 0 if the lock was not acquired. This means a 0 is returned
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261 * if the lock has already been acquired by this thread!
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262 */
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263 int
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264 PyThread_acquire_lock(PyThread_type_lock aLock, int waitflag)
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265 {
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266 int success ;
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267
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268 dprintf(("%ld: PyThread_acquire_lock(%p, %d) called\n", PyThread_get_thread_ident(),aLock, waitflag));
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269
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270 success = aLock && EnterNonRecursiveMutex((PNRMUTEX) aLock, (waitflag ? INFINITE : 0)) == WAIT_OBJECT_0 ;
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271
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272 dprintf(("%ld: PyThread_acquire_lock(%p, %d) -> %d\n", PyThread_get_thread_ident(),aLock, waitflag, success));
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273
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274 return success;
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275 }
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276
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277 void
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278 PyThread_release_lock(PyThread_type_lock aLock)
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279 {
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280 dprintf(("%ld: PyThread_release_lock(%p) called\n", PyThread_get_thread_ident(),aLock));
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281
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282 if (!(aLock && LeaveNonRecursiveMutex((PNRMUTEX) aLock)))
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283 dprintf(("%ld: Could not PyThread_release_lock(%p) error: %ld\n", PyThread_get_thread_ident(), aLock, GetLastError()));
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284 }
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285
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286 /* minimum/maximum thread stack sizes supported */
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287 #define THREAD_MIN_STACKSIZE 0x8000 /* 32kB */
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288 #define THREAD_MAX_STACKSIZE 0x10000000 /* 256MB */
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289
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290 /* set the thread stack size.
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291 * Return 0 if size is valid, -1 otherwise.
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292 */
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293 static int
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294 _pythread_nt_set_stacksize(size_t size)
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295 {
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296 /* set to default */
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297 if (size == 0) {
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298 _pythread_stacksize = 0;
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299 return 0;
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300 }
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301
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302 /* valid range? */
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303 if (size >= THREAD_MIN_STACKSIZE && size < THREAD_MAX_STACKSIZE) {
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304 _pythread_stacksize = size;
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305 return 0;
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306 }
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307
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308 return -1;
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309 }
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310
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311 #define THREAD_SET_STACKSIZE(x) _pythread_nt_set_stacksize(x)