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annotate Python/thread_beos.h @ 42466:3fc3cedc49ca

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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 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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diff changeset
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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diff changeset
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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parents:
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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 }