annotate Python/thread_nt.h @ 42466:3fc3cedc49ca

Merged revisions 56753-56781 via svnmerge from svn+ssh://pythondev@svn.python.org/python/branches/p3yk ................ r56760 | neal.norwitz | 2007-08-05 18:55:39 -0700 (Sun, 05 Aug 2007) | 178 lines Merged revisions 56477-56759 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r56485 | facundo.batista | 2007-07-21 17:13:00 -0700 (Sat, 21 Jul 2007) | 5 lines Selectively enable tests for asyncore.readwrite based on the presence of poll support in the select module (since this is the only case in which readwrite can be called). [GSoC - Alan McIntyre] ........ r56488 | nick.coghlan | 2007-07-22 03:18:07 -0700 (Sun, 22 Jul 2007) | 1 line Add explicit relative import tests for runpy.run_module ........ r56509 | nick.coghlan | 2007-07-23 06:41:45 -0700 (Mon, 23 Jul 2007) | 5 lines Correctly cleanup sys.modules after executing runpy relative import tests Restore Python 2.4 ImportError when attempting to execute a package (as imports cannot be guaranteed to work properly if you try it) ........ r56519 | nick.coghlan | 2007-07-24 06:07:38 -0700 (Tue, 24 Jul 2007) | 1 line Tweak runpy test to do a better job of confirming that sys has been manipulated correctly ........ r56520 | nick.coghlan | 2007-07-24 06:58:28 -0700 (Tue, 24 Jul 2007) | 1 line Fix an incompatibility between the -i and -m command line switches as reported on python-dev by PJE - runpy.run_module now leaves any changes it makes to the sys module intact after the function terminates ........ r56523 | nick.coghlan | 2007-07-24 07:39:23 -0700 (Tue, 24 Jul 2007) | 1 line Try to get rid of spurious failure in test_resource on the Debian buildbots by changing the file size limit before attempting to close the file ........ r56533 | facundo.batista | 2007-07-24 14:20:42 -0700 (Tue, 24 Jul 2007) | 7 lines New tests for basic behavior of smtplib.SMTP and smtpd.DebuggingServer. Change to use global host & port number variables. Modified the 'server' to take a string to send back in order to vary test server responses. Added a test for the reaction of smtplib.SMTP to a non-200 HELO response. [GSoC - Alan McIntyre] ........ r56538 | nick.coghlan | 2007-07-25 05:57:48 -0700 (Wed, 25 Jul 2007) | 1 line More buildbot cleanup - let the OS assign the port for test_urllib2_localnet ........ r56539 | nick.coghlan | 2007-07-25 06:18:58 -0700 (Wed, 25 Jul 2007) | 1 line Add a temporary diagnostic message before a strange failure on the alpha Debian buildbot ........ r56543 | martin.v.loewis | 2007-07-25 09:24:23 -0700 (Wed, 25 Jul 2007) | 2 lines Change location of the package index to pypi.python.org/pypi ........ r56551 | georg.brandl | 2007-07-26 02:36:25 -0700 (Thu, 26 Jul 2007) | 2 lines tabs, newlines and crs are valid XML characters. ........ r56553 | nick.coghlan | 2007-07-26 07:03:00 -0700 (Thu, 26 Jul 2007) | 1 line Add explicit test for a misbehaving math.floor ........ r56561 | mark.hammond | 2007-07-26 21:52:32 -0700 (Thu, 26 Jul 2007) | 3 lines In consultation with Kristjan Jonsson, only define WINVER and _WINNT_WIN32 if (a) we are building Python itself and (b) no one previously defined them ........ r56562 | mark.hammond | 2007-07-26 22:08:54 -0700 (Thu, 26 Jul 2007) | 2 lines Correctly detect AMD64 architecture on VC2003 ........ r56566 | nick.coghlan | 2007-07-27 03:36:30 -0700 (Fri, 27 Jul 2007) | 1 line Make test_math error messages more meaningful for small discrepancies in results ........ r56588 | martin.v.loewis | 2007-07-27 11:28:22 -0700 (Fri, 27 Jul 2007) | 2 lines Bug #978833: Close https sockets by releasing the _ssl object. ........ r56601 | martin.v.loewis | 2007-07-28 00:03:05 -0700 (Sat, 28 Jul 2007) | 3 lines Bug #1704793: Return UTF-16 pair if unicodedata.lookup cannot represent the result in a single character. ........ r56604 | facundo.batista | 2007-07-28 07:21:22 -0700 (Sat, 28 Jul 2007) | 9 lines Moved all of the capture_server socket setup code into the try block so that the event gets set if a failure occurs during server setup (otherwise the test will block forever). Changed to let the OS assign the server port number, and client side of test waits for port number assignment before proceeding. The test data in DispatcherWithSendTests is also sent in multiple send() calls instead of one to make sure this works properly. [GSoC - Alan McIntyre] ........ r56611 | georg.brandl | 2007-07-29 01:26:10 -0700 (Sun, 29 Jul 2007) | 2 lines Clarify PEP 343 description. ........ r56614 | georg.brandl | 2007-07-29 02:11:15 -0700 (Sun, 29 Jul 2007) | 2 lines try-except-finally is new in 2.5. ........ r56617 | facundo.batista | 2007-07-29 07:23:08 -0700 (Sun, 29 Jul 2007) | 9 lines Added tests for asynchat classes simple_producer & fifo, and the find_prefix_at_end function. Check behavior of a string given as a producer. Added tests for behavior of asynchat.async_chat when given int, long, and None terminator arguments. Added usepoll attribute to TestAsynchat to allow running the asynchat tests with poll support chosen whether it's available or not (improves coverage of asyncore code). [GSoC - Alan McIntyre] ........ r56620 | georg.brandl | 2007-07-29 10:38:35 -0700 (Sun, 29 Jul 2007) | 2 lines Bug #1763149: use proper slice syntax in docstring. (backport) ........ r56624 | mark.hammond | 2007-07-29 17:45:29 -0700 (Sun, 29 Jul 2007) | 4 lines Correct use of Py_BUILD_CORE - now make sure it is defined before it is referenced, and also fix definition of _WIN32_WINNT. Resolves patch 1761803. ........ r56632 | facundo.batista | 2007-07-30 20:03:34 -0700 (Mon, 30 Jul 2007) | 8 lines When running asynchat tests on OS X (darwin), the test client now overrides asyncore.dispatcher.handle_expt to do nothing, since select.poll gives a POLLHUP error at the completion of these tests. Added timeout & count arguments to several asyncore.loop calls to avoid the possibility of a test hanging up a build. [GSoC - Alan McIntyre] ........ r56633 | nick.coghlan | 2007-07-31 06:38:01 -0700 (Tue, 31 Jul 2007) | 1 line Eliminate RLock race condition reported in SF bug #1764059 ........ r56636 | martin.v.loewis | 2007-07-31 12:57:56 -0700 (Tue, 31 Jul 2007) | 2 lines Define _BSD_SOURCE, to get access to POSIX extensions on OpenBSD 4.1+. ........ r56653 | facundo.batista | 2007-08-01 16:18:36 -0700 (Wed, 01 Aug 2007) | 9 lines Allow the OS to select a free port for each test server. For DebuggingServerTests, construct SMTP objects with a localhost argument to avoid abysmally long FQDN lookups (not relevant to items under test) on some machines that would cause the test to fail. Moved server setup code in the server function inside the try block to avoid the possibility of setup failure hanging the test. Minor edits to conform to PEP 8. [GSoC - Alan McIntyre] ........ r56681 | matthias.klose | 2007-08-02 14:33:13 -0700 (Thu, 02 Aug 2007) | 2 lines - Allow Emacs 22 for building the documentation in info format. ........ r56689 | neal.norwitz | 2007-08-02 23:46:29 -0700 (Thu, 02 Aug 2007) | 1 line Py_ssize_t is defined regardless of HAVE_LONG_LONG. Will backport ........ r56727 | hyeshik.chang | 2007-08-03 21:10:18 -0700 (Fri, 03 Aug 2007) | 3 lines Fix gb18030 codec's bug that doesn't map two-byte characters on GB18030 extension in encoding. (bug reported by Bjorn Stabell) ........ r56751 | neal.norwitz | 2007-08-04 20:23:31 -0700 (Sat, 04 Aug 2007) | 7 lines Handle errors when generating a warning. The value is always written to the returned pointer if getting it was successful, even if a warning causes an error. (This probably doesn't matter as the caller will probably discard the value.) Will backport. ........ ................
author Guido van Rossum <guido@python.org>
date Mon, 06 Aug 2007 23:33:07 +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)