cpython-lru_cache-weakref: Python/thread.c annotate

annotate Python/thread.c @ 22621:830c829a7eb2 legacy-trunk

Fix an issue that was reported in but unrelated to the main problem of SF bug 535905 (Evil Trashcan and GC interaction). The SETLOCAL() macro should not DECREF the local variable in-place and then store the new value; it should copy the old value to a temporary value, then store the new value, and then DECREF the temporary value. This is because it is possible that during the DECREF the frame is accessed by other code (e.g. a __del__ method or gc.collect()) and the variable would be pointing to already-freed memory. BUGFIX CANDIDATE!

author	Guido van Rossum <guido@python.org>
date	Thu, 28 Mar 2002 20:17:52 +0000
parents	54c05a947bcb
children	bec1b942e0bc

rev	line source
1198 2937897a7d8b * Added Fixcprt.py: script to fix copyright message. Guido van Rossum <guido@python.org> parents: 1186 diff changeset	1
1848 b724599401ff Merge back to main trunk Guido van Rossum <guido@python.org> parents: 1418 diff changeset	2 /* Thread package.
b724599401ff Merge back to main trunk Guido van Rossum <guido@python.org> parents: 1418 diff changeset	3 This is intended to be usable independently from Python.
b724599401ff Merge back to main trunk Guido van Rossum <guido@python.org> parents: 1418 diff changeset	4 The implementation for system foobar is in a file thread_foobar.h
b724599401ff Merge back to main trunk Guido van Rossum <guido@python.org> parents: 1418 diff changeset	5 which is included by this file dependent on config settings.
b724599401ff Merge back to main trunk Guido van Rossum <guido@python.org> parents: 1418 diff changeset	6 Stuff shared by all thread_.h files is collected here. /
b724599401ff Merge back to main trunk Guido van Rossum <guido@python.org> parents: 1418 diff changeset	7
21712 c64fc56f6072 Include <unistd.h> in Python.h. Fixes #500924. Martin v. Löwis <martin@v.loewis.de> parents: 20468 diff changeset	8 #include "Python.h"
1848 b724599401ff Merge back to main trunk Guido van Rossum <guido@python.org> parents: 1418 diff changeset	9
18845 876aecef6483 Repair more now-obsolete references to config.h. Tim Peters <tim.peters@gmail.com> parents: 18835 diff changeset	10 /* pyconfig.h may or may not define DL_IMPORT */
9589 01c8fe44064b Need to add default decl of DL_IMPORT, for mymalloc.h Guido van Rossum <guido@python.org> parents: 9203 diff changeset	11 #ifndef DL_IMPORT /* declarations for DLL import/export */
01c8fe44064b Need to add default decl of DL_IMPORT, for mymalloc.h Guido van Rossum <guido@python.org> parents: 9203 diff changeset	12 #define DL_IMPORT(RTYPE) RTYPE
01c8fe44064b Need to add default decl of DL_IMPORT, for mymalloc.h Guido van Rossum <guido@python.org> parents: 9203 diff changeset	13 #endif
01c8fe44064b Need to add default decl of DL_IMPORT, for mymalloc.h Guido van Rossum <guido@python.org> parents: 9203 diff changeset	14
10530 d834ecdf8c26 Changes by Mark Hammond for Windows CE. Mostly of the form Guido van Rossum <guido@python.org> parents: 9679 diff changeset	15 #ifndef DONT_HAVE_STDIO_H
1848 b724599401ff Merge back to main trunk Guido van Rossum <guido@python.org> parents: 1418 diff changeset	16 #include <stdio.h>
10530 d834ecdf8c26 Changes by Mark Hammond for Windows CE. Mostly of the form Guido van Rossum <guido@python.org> parents: 9679 diff changeset	17 #endif
1848 b724599401ff Merge back to main trunk Guido van Rossum <guido@python.org> parents: 1418 diff changeset	18
b724599401ff Merge back to main trunk Guido van Rossum <guido@python.org> parents: 1418 diff changeset	19 #ifdef HAVE_STDLIB_H
b724599401ff Merge back to main trunk Guido van Rossum <guido@python.org> parents: 1418 diff changeset	20 #include <stdlib.h>
b724599401ff Merge back to main trunk Guido van Rossum <guido@python.org> parents: 1418 diff changeset	21 #else
10530 d834ecdf8c26 Changes by Mark Hammond for Windows CE. Mostly of the form Guido van Rossum <guido@python.org> parents: 9679 diff changeset	22 #ifdef Py_DEBUG
13658 f79434ee41fa Mass ANSIfication of function definitions. Doesn't cover all 'extern' Thomas Wouters <thomas@python.org> parents: 13256 diff changeset	23 extern char getenv(const char );
1848 b724599401ff Merge back to main trunk Guido van Rossum <guido@python.org> parents: 1418 diff changeset	24 #endif
10530 d834ecdf8c26 Changes by Mark Hammond for Windows CE. Mostly of the form Guido van Rossum <guido@python.org> parents: 9679 diff changeset	25 #endif
1848 b724599401ff Merge back to main trunk Guido van Rossum <guido@python.org> parents: 1418 diff changeset	26
5599 b5e51ae9f832 DG/UX thread patches (Ross Andrus) Guido van Rossum <guido@python.org> parents: 5381 diff changeset	27 #ifdef __DGUX
b5e51ae9f832 DG/UX thread patches (Ross Andrus) Guido van Rossum <guido@python.org> parents: 5381 diff changeset	28 #define _USING_POSIX4A_DRAFT6
b5e51ae9f832 DG/UX thread patches (Ross Andrus) Guido van Rossum <guido@python.org> parents: 5381 diff changeset	29 #endif
b5e51ae9f832 DG/UX thread patches (Ross Andrus) Guido van Rossum <guido@python.org> parents: 5381 diff changeset	30
5381 339d4129d3f7 Ugly hack for SGI IRIX 6.2. Apparently _POSIX_THREADS is defined even Guido van Rossum <guido@python.org> parents: 4839 diff changeset	31 #ifdef __sgi
339d4129d3f7 Ugly hack for SGI IRIX 6.2. Apparently _POSIX_THREADS is defined even Guido van Rossum <guido@python.org> parents: 4839 diff changeset	32 #ifndef HAVE_PTHREAD_H /* XXX Need to check in configure.in */
339d4129d3f7 Ugly hack for SGI IRIX 6.2. Apparently _POSIX_THREADS is defined even Guido van Rossum <guido@python.org> parents: 4839 diff changeset	33 #undef _POSIX_THREADS
339d4129d3f7 Ugly hack for SGI IRIX 6.2. Apparently _POSIX_THREADS is defined even Guido van Rossum <guido@python.org> parents: 4839 diff changeset	34 #endif
339d4129d3f7 Ugly hack for SGI IRIX 6.2. Apparently _POSIX_THREADS is defined even Guido van Rossum <guido@python.org> parents: 4839 diff changeset	35 #endif
339d4129d3f7 Ugly hack for SGI IRIX 6.2. Apparently _POSIX_THREADS is defined even Guido van Rossum <guido@python.org> parents: 4839 diff changeset	36
9203 07dae6fdae79 Renamed thread.h to pythread.h. Guido van Rossum <guido@python.org> parents: 8822 diff changeset	37 #include "pythread.h"
923 72aceed365d4 * Makefile adapted to changes below. Guido van Rossum <guido@python.org> parents: diff changeset	38
1848 b724599401ff Merge back to main trunk Guido van Rossum <guido@python.org> parents: 1418 diff changeset	39 #ifndef _POSIX_THREADS
b724599401ff Merge back to main trunk Guido van Rossum <guido@python.org> parents: 1418 diff changeset	40
923 72aceed365d4 * Makefile adapted to changes below. Guido van Rossum <guido@python.org> parents: diff changeset	41 #ifdef __sgi
1848 b724599401ff Merge back to main trunk Guido van Rossum <guido@python.org> parents: 1418 diff changeset	42 #define SGI_THREADS
b724599401ff Merge back to main trunk Guido van Rossum <guido@python.org> parents: 1418 diff changeset	43 #endif
961 a31e07847063 New thread.c from Sjoerd, supports _exit_prog(). Use this in goaway() Guido van Rossum <guido@python.org> parents: 926 diff changeset	44
1848 b724599401ff Merge back to main trunk Guido van Rossum <guido@python.org> parents: 1418 diff changeset	45 #ifdef HAVE_THREAD_H
b724599401ff Merge back to main trunk Guido van Rossum <guido@python.org> parents: 1418 diff changeset	46 #define SOLARIS_THREADS
923 72aceed365d4 * Makefile adapted to changes below. Guido van Rossum <guido@python.org> parents: diff changeset	47 #endif
72aceed365d4 * Makefile adapted to changes below. Guido van Rossum <guido@python.org> parents: diff changeset	48
1848 b724599401ff Merge back to main trunk Guido van Rossum <guido@python.org> parents: 1418 diff changeset	49 #if defined(sun) && !defined(SOLARIS_THREADS)
b724599401ff Merge back to main trunk Guido van Rossum <guido@python.org> parents: 1418 diff changeset	50 #define SUN_LWP
b724599401ff Merge back to main trunk Guido van Rossum <guido@python.org> parents: 1418 diff changeset	51 #endif
b724599401ff Merge back to main trunk Guido van Rossum <guido@python.org> parents: 1418 diff changeset	52
15047 457f0df46dd9 Donn Cave <donn@u.washington.edu>: Fred Drake <fdrake@acm.org> parents: 14674 diff changeset	53 #if defined(__MWERKS__) && !defined(__BEOS__)
12475 c27f484aefff Jack Jansen: Posix threads are now supported on the Macintosh too. Guido van Rossum <guido@python.org> parents: 10530 diff changeset	54 #define _POSIX_THREADS
c27f484aefff Jack Jansen: Posix threads are now supported on the Macintosh too. Guido van Rossum <guido@python.org> parents: 10530 diff changeset	55 #endif
c27f484aefff Jack Jansen: Posix threads are now supported on the Macintosh too. Guido van Rossum <guido@python.org> parents: 10530 diff changeset	56
1418 b1bb74a2b593 Port to Solaris 2.3. Sjoerd Mullender <sjoerd@acm.org> parents: 1350 diff changeset	57 #endif /* _POSIX_THREADS */
923 72aceed365d4 * Makefile adapted to changes below. Guido van Rossum <guido@python.org> parents: diff changeset	58
72aceed365d4 * Makefile adapted to changes below. Guido van Rossum <guido@python.org> parents: diff changeset	59
4839 4567e158d20c Rename DEBUG macro to Py_DEBUG Guido van Rossum <guido@python.org> parents: 4596 diff changeset	60 #ifdef Py_DEBUG
1848 b724599401ff Merge back to main trunk Guido van Rossum <guido@python.org> parents: 1418 diff changeset	61 static int thread_debug = 0;
b724599401ff Merge back to main trunk Guido van Rossum <guido@python.org> parents: 1418 diff changeset	62 #define dprintf(args) ((thread_debug & 1) && printf args)
b724599401ff Merge back to main trunk Guido van Rossum <guido@python.org> parents: 1418 diff changeset	63 #define d2printf(args) ((thread_debug & 8) && printf args)
b724599401ff Merge back to main trunk Guido van Rossum <guido@python.org> parents: 1418 diff changeset	64 #else
b724599401ff Merge back to main trunk Guido van Rossum <guido@python.org> parents: 1418 diff changeset	65 #define dprintf(args)
b724599401ff Merge back to main trunk Guido van Rossum <guido@python.org> parents: 1418 diff changeset	66 #define d2printf(args)
b724599401ff Merge back to main trunk Guido van Rossum <guido@python.org> parents: 1418 diff changeset	67 #endif
b724599401ff Merge back to main trunk Guido van Rossum <guido@python.org> parents: 1418 diff changeset	68
923 72aceed365d4 * Makefile adapted to changes below. Guido van Rossum <guido@python.org> parents: diff changeset	69 static int initialized;
72aceed365d4 * Makefile adapted to changes below. Guido van Rossum <guido@python.org> parents: diff changeset	70
13689 9db86b27278f Prototype yet another forward declaration. Thomas Wouters <thomas@python.org> parents: 13658 diff changeset	71 static void PyThread__init_thread(void); /* Forward */
1004 5d7142ea01b7 adapted SV module to the new svideo library. Sjoerd Mullender <sjoerd@acm.org> parents: 961 diff changeset	72
13658 f79434ee41fa Mass ANSIfication of function definitions. Doesn't cover all 'extern' Thomas Wouters <thomas@python.org> parents: 13256 diff changeset	73 void PyThread_init_thread(void)
1004 5d7142ea01b7 adapted SV module to the new svideo library. Sjoerd Mullender <sjoerd@acm.org> parents: 961 diff changeset	74 {
4839 4567e158d20c Rename DEBUG macro to Py_DEBUG Guido van Rossum <guido@python.org> parents: 4596 diff changeset	75 #ifdef Py_DEBUG
1418 b1bb74a2b593 Port to Solaris 2.3. Sjoerd Mullender <sjoerd@acm.org> parents: 1350 diff changeset	76 char *p = getenv("THREADDEBUG");
b1bb74a2b593 Port to Solaris 2.3. Sjoerd Mullender <sjoerd@acm.org> parents: 1350 diff changeset	77
b1bb74a2b593 Port to Solaris 2.3. Sjoerd Mullender <sjoerd@acm.org> parents: 1350 diff changeset	78 if (p) {
b1bb74a2b593 Port to Solaris 2.3. Sjoerd Mullender <sjoerd@acm.org> parents: 1350 diff changeset	79 if (*p)
b1bb74a2b593 Port to Solaris 2.3. Sjoerd Mullender <sjoerd@acm.org> parents: 1350 diff changeset	80 thread_debug = atoi(p);
b1bb74a2b593 Port to Solaris 2.3. Sjoerd Mullender <sjoerd@acm.org> parents: 1350 diff changeset	81 else
b1bb74a2b593 Port to Solaris 2.3. Sjoerd Mullender <sjoerd@acm.org> parents: 1350 diff changeset	82 thread_debug = 1;
b1bb74a2b593 Port to Solaris 2.3. Sjoerd Mullender <sjoerd@acm.org> parents: 1350 diff changeset	83 }
4839 4567e158d20c Rename DEBUG macro to Py_DEBUG Guido van Rossum <guido@python.org> parents: 4596 diff changeset	84 #endif /* Py_DEBUG */
1004 5d7142ea01b7 adapted SV module to the new svideo library. Sjoerd Mullender <sjoerd@acm.org> parents: 961 diff changeset	85 if (initialized)
5d7142ea01b7 adapted SV module to the new svideo library. Sjoerd Mullender <sjoerd@acm.org> parents: 961 diff changeset	86 return;
5d7142ea01b7 adapted SV module to the new svideo library. Sjoerd Mullender <sjoerd@acm.org> parents: 961 diff changeset	87 initialized = 1;
9679 877d23bd5bdc Thanks to Chris Herborth, the thread primitives now have proper Py* Guido van Rossum <guido@python.org> parents: 9589 diff changeset	88 dprintf(("PyThread_init_thread called\n"));
877d23bd5bdc Thanks to Chris Herborth, the thread primitives now have proper Py* Guido van Rossum <guido@python.org> parents: 9589 diff changeset	89 PyThread__init_thread();
923 72aceed365d4 * Makefile adapted to changes below. Guido van Rossum <guido@python.org> parents: diff changeset	90 }
72aceed365d4 * Makefile adapted to changes below. Guido van Rossum <guido@python.org> parents: diff changeset	91
1848 b724599401ff Merge back to main trunk Guido van Rossum <guido@python.org> parents: 1418 diff changeset	92 #ifdef SGI_THREADS
b724599401ff Merge back to main trunk Guido van Rossum <guido@python.org> parents: 1418 diff changeset	93 #include "thread_sgi.h"
1418 b1bb74a2b593 Port to Solaris 2.3. Sjoerd Mullender <sjoerd@acm.org> parents: 1350 diff changeset	94 #endif
961 a31e07847063 New thread.c from Sjoerd, supports _exit_prog(). Use this in goaway() Guido van Rossum <guido@python.org> parents: 926 diff changeset	95
1848 b724599401ff Merge back to main trunk Guido van Rossum <guido@python.org> parents: 1418 diff changeset	96 #ifdef SOLARIS_THREADS
b724599401ff Merge back to main trunk Guido van Rossum <guido@python.org> parents: 1418 diff changeset	97 #include "thread_solaris.h"
923 72aceed365d4 * Makefile adapted to changes below. Guido van Rossum <guido@python.org> parents: diff changeset	98 #endif
1848 b724599401ff Merge back to main trunk Guido van Rossum <guido@python.org> parents: 1418 diff changeset	99
b724599401ff Merge back to main trunk Guido van Rossum <guido@python.org> parents: 1418 diff changeset	100 #ifdef SUN_LWP
b724599401ff Merge back to main trunk Guido van Rossum <guido@python.org> parents: 1418 diff changeset	101 #include "thread_lwp.h"
923 72aceed365d4 * Makefile adapted to changes below. Guido van Rossum <guido@python.org> parents: diff changeset	102 #endif
72aceed365d4 * Makefile adapted to changes below. Guido van Rossum <guido@python.org> parents: diff changeset	103
14674 756c8c6535fe Make better use of GNU Pth -- patch by Andy Dustman. Guido van Rossum <guido@python.org> parents: 14375 diff changeset	104 #ifdef HAVE_PTH
12611 b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: 12475 diff changeset	105 #include "thread_pth.h"
14674 756c8c6535fe Make better use of GNU Pth -- patch by Andy Dustman. Guido van Rossum <guido@python.org> parents: 14375 diff changeset	106 #endif
756c8c6535fe Make better use of GNU Pth -- patch by Andy Dustman. Guido van Rossum <guido@python.org> parents: 14375 diff changeset	107
1848 b724599401ff Merge back to main trunk Guido van Rossum <guido@python.org> parents: 1418 diff changeset	108 #ifdef _POSIX_THREADS
b724599401ff Merge back to main trunk Guido van Rossum <guido@python.org> parents: 1418 diff changeset	109 #include "thread_pthread.h"
923 72aceed365d4 * Makefile adapted to changes below. Guido van Rossum <guido@python.org> parents: diff changeset	110 #endif
72aceed365d4 * Makefile adapted to changes below. Guido van Rossum <guido@python.org> parents: diff changeset	111
1848 b724599401ff Merge back to main trunk Guido van Rossum <guido@python.org> parents: 1418 diff changeset	112 #ifdef C_THREADS
b724599401ff Merge back to main trunk Guido van Rossum <guido@python.org> parents: 1418 diff changeset	113 #include "thread_cthread.h"
b724599401ff Merge back to main trunk Guido van Rossum <guido@python.org> parents: 1418 diff changeset	114 #endif
923 72aceed365d4 * Makefile adapted to changes below. Guido van Rossum <guido@python.org> parents: diff changeset	115
2152 1a52351a00b2 nt thread support Guido van Rossum <guido@python.org> parents: 2062 diff changeset	116 #ifdef NT_THREADS
1a52351a00b2 nt thread support Guido van Rossum <guido@python.org> parents: 2062 diff changeset	117 #include "thread_nt.h"
1a52351a00b2 nt thread support Guido van Rossum <guido@python.org> parents: 2062 diff changeset	118 #endif
1a52351a00b2 nt thread support Guido van Rossum <guido@python.org> parents: 2062 diff changeset	119
6626 5e31d381fa47 os2 patch by Jeff Rush Guido van Rossum <guido@python.org> parents: 5599 diff changeset	120 #ifdef OS2_THREADS
5e31d381fa47 os2 patch by Jeff Rush Guido van Rossum <guido@python.org> parents: 5599 diff changeset	121 #include "thread_os2.h"
5e31d381fa47 os2 patch by Jeff Rush Guido van Rossum <guido@python.org> parents: 5599 diff changeset	122 #endif
5e31d381fa47 os2 patch by Jeff Rush Guido van Rossum <guido@python.org> parents: 5599 diff changeset	123
8822 bd47ee068b83 Changes for BeOS, QNX and long long, by Chris Herborth. Guido van Rossum <guido@python.org> parents: 6626 diff changeset	124 #ifdef BEOS_THREADS
bd47ee068b83 Changes for BeOS, QNX and long long, by Chris Herborth. Guido van Rossum <guido@python.org> parents: 6626 diff changeset	125 #include "thread_beos.h"
bd47ee068b83 Changes for BeOS, QNX and long long, by Chris Herborth. Guido van Rossum <guido@python.org> parents: 6626 diff changeset	126 #endif
bd47ee068b83 Changes for BeOS, QNX and long long, by Chris Herborth. Guido van Rossum <guido@python.org> parents: 6626 diff changeset	127
10530 d834ecdf8c26 Changes by Mark Hammond for Windows CE. Mostly of the form Guido van Rossum <guido@python.org> parents: 9679 diff changeset	128 #ifdef WINCE_THREADS
d834ecdf8c26 Changes by Mark Hammond for Windows CE. Mostly of the form Guido van Rossum <guido@python.org> parents: 9679 diff changeset	129 #include "thread_wince.h"
d834ecdf8c26 Changes by Mark Hammond for Windows CE. Mostly of the form Guido van Rossum <guido@python.org> parents: 9679 diff changeset	130 #endif
d834ecdf8c26 Changes by Mark Hammond for Windows CE. Mostly of the form Guido van Rossum <guido@python.org> parents: 9679 diff changeset	131
22206 b898c0feb754 Patch #504224: add plan9 threads include to thread.c. Martin v. Löwis <martin@v.loewis.de> parents: 21712 diff changeset	132 #ifdef PLAN9_THREADS
b898c0feb754 Patch #504224: add plan9 threads include to thread.c. Martin v. Löwis <martin@v.loewis.de> parents: 21712 diff changeset	133 #include "thread_plan9.h"
b898c0feb754 Patch #504224: add plan9 threads include to thread.c. Martin v. Löwis <martin@v.loewis.de> parents: 21712 diff changeset	134 #endif
b898c0feb754 Patch #504224: add plan9 threads include to thread.c. Martin v. Löwis <martin@v.loewis.de> parents: 21712 diff changeset	135
961 a31e07847063 New thread.c from Sjoerd, supports _exit_prog(). Use this in goaway() Guido van Rossum <guido@python.org> parents: 926 diff changeset	136 /*
1848 b724599401ff Merge back to main trunk Guido van Rossum <guido@python.org> parents: 1418 diff changeset	137 #ifdef FOOBAR_THREADS
b724599401ff Merge back to main trunk Guido van Rossum <guido@python.org> parents: 1418 diff changeset	138 #include "thread_foobar.h"
923 72aceed365d4 * Makefile adapted to changes below. Guido van Rossum <guido@python.org> parents: diff changeset	139 #endif
1848 b724599401ff Merge back to main trunk Guido van Rossum <guido@python.org> parents: 1418 diff changeset	140 */

Mercurial > cpython-lru_cache-weakref

annotate Python/thread.c @ 22621:830c829a7eb2 legacy-trunk