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annotate Python/thread_beos.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 8b116a8449bd
children e38335d4df91 df5719c298db
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1 #include <kernel/OS.h>
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2 #include <support/SupportDefs.h>
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3 #include <errno.h>
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4
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5 /* ----------------------------------------------------------------------
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6 * Fast locking mechanism described by Benoit Schillings (benoit@be.com)
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7 * in the Be Developer's Newsletter, Issue #26 (http://www.be.com/).
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8 */
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9 typedef struct benaphore {
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10 sem_id _sem;
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11 int32 _atom;
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12 } benaphore_t;
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13
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14 static status_t benaphore_create( const char *name, benaphore_t *ben );
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15 static status_t benaphore_destroy( benaphore_t *ben );
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16 static status_t benaphore_lock( benaphore_t *ben );
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17 static status_t benaphore_timedlock( benaphore_t *ben, bigtime_t micros );
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18 static status_t benaphore_unlock( benaphore_t *ben );
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19
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20 static status_t benaphore_create( const char *name, benaphore_t *ben )
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21 {
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22 if( ben != NULL ) {
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23 ben->_atom = 0;
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24 ben->_sem = create_sem( 0, name );
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25
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26 if( ben->_sem < B_NO_ERROR ) {
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27 return B_BAD_SEM_ID;
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28 }
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29 } else {
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30 return EFAULT;
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31 }
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32
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33 return EOK;
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34 }
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35
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36 static status_t benaphore_destroy( benaphore_t *ben )
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37 {
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38 if( ben->_sem >= B_NO_ERROR ) {
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39 status_t retval = benaphore_timedlock( ben, 0 );
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40
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41 if( retval == EOK || retval == EWOULDBLOCK ) {
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42 status_t del_retval = delete_sem( ben->_sem );
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43
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44 return del_retval;
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45 }
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46 }
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47
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48 return B_BAD_SEM_ID;
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49 }
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50
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51 static status_t benaphore_lock( benaphore_t *ben )
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52 {
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53 int32 prev = atomic_add( &(ben->_atom), 1 );
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54
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55 if( prev > 0 ) {
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56 return acquire_sem( ben->_sem );
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57 }
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58
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59 return EOK;
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60 }
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61
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62 static status_t benaphore_timedlock( benaphore_t *ben, bigtime_t micros )
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63 {
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64 int32 prev = atomic_add( &(ben->_atom), 1 );
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65
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66 if( prev > 0 ) {
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67 status_t retval = acquire_sem_etc( ben->_sem, 1, B_TIMEOUT, micros );
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68
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69 switch( retval ) {
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70 case B_WOULD_BLOCK: /* Fall through... */
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71 case B_TIMED_OUT:
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72 return EWOULDBLOCK;
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73 break;
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74 case B_OK:
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75 return EOK;
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76 break;
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77 default:
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78 return retval;
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79 break;
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80 }
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81 }
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82
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83 return EOK;
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84 }
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85
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86 static status_t benaphore_unlock( benaphore_t *ben )
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87 {
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88 int32 prev = atomic_add( &(ben->_atom), -1 );
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89
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90 if( prev > 1 ) {
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91 return release_sem( ben->_sem );
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92 }
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93
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94 return EOK;
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95 }
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96
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97 /* ----------------------------------------------------------------------
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98 * Initialization.
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99 */
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877d23bd5bdc Thanks to Chris Herborth, the thread primitives now have proper Py*
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100 static void PyThread__init_thread( void )
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101 {
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102 /* Do nothing. */
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103 return;
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104 }
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105
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106 /* ----------------------------------------------------------------------
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107 * Thread support.
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108 *
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109 * Only ANSI C, renamed functions here; you can't use K&R on BeOS,
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110 * and there's no legacy thread module to support.
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111 */
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112
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113 static int32 thread_count = 0;
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114
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115 long PyThread_start_new_thread( void (*func)(void *), void *arg )
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116 {
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117 status_t success = 0;
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118 thread_id tid;
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119 char name[B_OS_NAME_LENGTH];
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120 int32 this_thread;
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121
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122 dprintf(("PyThread_start_new_thread called\n"));
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123
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124 /* We are so very thread-safe... */
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125 this_thread = atomic_add( &thread_count, 1 );
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126 PyOS_snprintf(name, sizeof(name),
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127 "python thread (%d)", this_thread );
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128
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129 tid = spawn_thread( (thread_func)func, name,
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130 B_NORMAL_PRIORITY, arg );
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131 if( tid > B_NO_ERROR ) {
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132 success = resume_thread( tid );
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133 }
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134
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135 return ( success == B_NO_ERROR ? tid : -1 );
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136 }
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137
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138 long PyThread_get_thread_ident( void )
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139 {
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140 /* Presumed to return the current thread's ID... */
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141 thread_id tid;
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142 tid = find_thread( NULL );
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143
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144 return ( tid != B_NAME_NOT_FOUND ? tid : -1 );
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145 }
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146
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147 static void do_PyThread_exit_thread( int no_cleanup )
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148 {
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149 int32 threads;
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150
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151 dprintf(("PyThread_exit_thread called\n"));
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152
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153 /* Thread-safe way to read a variable without a mutex: */
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154 threads = atomic_add( &thread_count, 0 );
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155
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156 if( threads == 0 ) {
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157 /* No threads around, so exit main(). */
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158 if( no_cleanup ) {
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159 _exit(0);
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160 } else {
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161 exit(0);
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162 }
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163 } else {
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164 /* Oh, we're a thread, let's try to exit gracefully... */
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165 exit_thread( B_NO_ERROR );
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166 }
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167 }
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168
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169 void PyThread_exit_thread( void )
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170 {
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171 do_PyThread_exit_thread(0);
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172 }
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173
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174 void PyThread__exit_thread( void )
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175 {
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176 do_PyThread_exit_thread(1);
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177 }
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178
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179 #ifndef NO_EXIT_PROG
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180 static void do_PyThread_exit_prog( int status, int no_cleanup )
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181 {
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182 dprintf(("PyThread_exit_prog(%d) called\n", status));
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183
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184 /* No need to do anything, the threads get torn down if main() exits. */
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185
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186 if (no_cleanup) {
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187 _exit(status);
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188 } else {
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189 exit(status);
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190 }
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191 }
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192
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193 void PyThread_exit_prog( int status )
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194 {
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195 do_PyThread_exit_prog(status, 0);
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196 }
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197
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198 void PyThread__exit_prog( int status )
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199 {
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200 do_PyThread_exit_prog(status, 1);
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201 }
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202 #endif /* NO_EXIT_PROG */
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203
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204 /* ----------------------------------------------------------------------
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205 * Lock support.
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206 */
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207
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208 static int32 lock_count = 0;
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209
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210 PyThread_type_lock PyThread_allocate_lock( void )
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211 {
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212 benaphore_t *lock;
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213 status_t retval;
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214 char name[B_OS_NAME_LENGTH];
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215 int32 this_lock;
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216
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217 dprintf(("PyThread_allocate_lock called\n"));
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218
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219 lock = (benaphore_t *)malloc( sizeof( benaphore_t ) );
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220 if( lock == NULL ) {
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221 /* TODO: that's bad, raise MemoryError */
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222 return (PyThread_type_lock)NULL;
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223 }
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224
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225 this_lock = atomic_add( &lock_count, 1 );
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226 PyOS_snprintf(name, sizeof(name), "python lock (%d)", this_lock);
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227
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228 retval = benaphore_create( name, lock );
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229 if( retval != EOK ) {
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230 /* TODO: that's bad, raise an exception */
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231 return (PyThread_type_lock)NULL;
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232 }
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233
13210
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234 dprintf(("PyThread_allocate_lock() -> %p\n", lock));
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235 return (PyThread_type_lock) lock;
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236 }
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237
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238 void PyThread_free_lock( PyThread_type_lock lock )
9603
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239 {
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240 status_t retval;
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241
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Fred Drake <fdrake@acm.org>
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242 dprintf(("PyThread_free_lock(%p) called\n", lock));
9603
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243
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244 retval = benaphore_destroy( (benaphore_t *)lock );
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245 if( retval != EOK ) {
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246 /* TODO: that's bad, raise an exception */
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247 return;
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248 }
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249 }
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250
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251 int PyThread_acquire_lock( PyThread_type_lock lock, int waitflag )
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252 {
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253 int success;
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254 status_t retval;
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255
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256 dprintf(("PyThread_acquire_lock(%p, %d) called\n", lock, waitflag));
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257
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258 if( waitflag ) {
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259 retval = benaphore_lock( (benaphore_t *)lock );
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260 } else {
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261 retval = benaphore_timedlock( (benaphore_t *)lock, 0 );
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262 }
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263
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264 if( retval == EOK ) {
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265 success = 1;
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266 } else {
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267 success = 0;
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268
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269 /* TODO: that's bad, raise an exception */
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270 }
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271
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272 dprintf(("PyThread_acquire_lock(%p, %d) -> %d\n", lock, waitflag, success));
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273 return success;
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274 }
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275
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276 void PyThread_release_lock( PyThread_type_lock lock )
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277 {
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278 status_t retval;
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279
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280 dprintf(("PyThread_release_lock(%p) called\n", lock));
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281
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282 retval = benaphore_unlock( (benaphore_t *)lock );
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283 if( retval != EOK ) {
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284 /* TODO: that's bad, raise an exception */
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285 return;
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286 }
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287 }