cpython-lru_cache-weakref: Python/thread

annotate Python/thread_pth.h @ 33940:dfd07b7be407 legacy-trunk

SF bug 1061968: threads: segfault or Py_FatalError at exit PyGILState_Ensure(): The fix in 2.4a3 for bug 1010677 reintroduced thread shutdown race bug 225673. Repaired by (once again) ensuring the GIL is held whenever deleting a thread state. Alas, there's no useful test case for this shy bug. Four years ago, only Guido could provoke it, on his box, and today only Armin can provoke it on his box. I've never been able to provoke it (but not for lack of trying!). This is a critical fix for 2.3.5 too, since the fix for 1010677 got backported there already and so also reintroduced 225673. I don't intend to backport this fix. For whoever (if anyone) does, there are other thread fixes in 2.4 that need backporting too, and I bet they need to happen first for this patch to apply cleanly.

author	Tim Peters <tim.peters@gmail.com>
date	Mon, 08 Nov 2004 04:30:21 +0000
parents	1a817694ecbd
children	e38335d4df91 df5719c298db

rev	line source
12611 b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	1
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	2 /* GNU pth threads interface
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	3 http://www.gnu.org/software/pth
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	4 2000-05-03 Andy Dustman <andy@dustman.net>
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	5
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	6 Adapted from Posix threads interface
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	7 12 May 1997 -- david arnold <davida@pobox.com>
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	8 */
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	9
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	10 #include <stdlib.h>
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	11 #include <string.h>
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	12 #include <pth.h>
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	13
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	14 /* A pth mutex isn't sufficient to model the Python lock type
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	15 * because pth mutexes can be acquired multiple times by the
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	16 * same thread.
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	17 *
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	18 * The pth_lock struct implements a Python lock as a "locked?" bit
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	19 * and a <condition, mutex> pair. In general, if the bit can be acquired
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	20 * instantly, it is, else the pair is used to block the thread until the
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	21 * bit is cleared.
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	22 */
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	23
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	24 typedef struct {
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	25 char locked; /* 0=unlocked, 1=locked */
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	26 /* a <cond, mutex> pair to handle an acquire of a locked lock */
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	27 pth_cond_t lock_released;
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	28 pth_mutex_t mut;
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	29 } pth_lock;
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	30
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	31 #define CHECK_STATUS(name) if (status == -1) { printf("%d ", status); perror(name); error = 1; }
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	32
30466 1a817694ecbd Patch #805613: Fix usage of the PTH library. Martin v. Löwis <martin@v.loewis.de> parents: 21766 diff changeset	33 pth_attr_t PyThread_attr;
1a817694ecbd Patch #805613: Fix usage of the PTH library. Martin v. Löwis <martin@v.loewis.de> parents: 21766 diff changeset	34
12611 b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	35 /*
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	36 * Initialization.
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	37 */
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	38
13658 f79434ee41fa Mass ANSIfication of function definitions. Doesn't cover all 'extern' Thomas Wouters <thomas@python.org> parents: 13256 diff changeset	39 static void PyThread__init_thread(void)
12611 b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	40 {
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	41 pth_init();
30466 1a817694ecbd Patch #805613: Fix usage of the PTH library. Martin v. Löwis <martin@v.loewis.de> parents: 21766 diff changeset	42 PyThread_attr = pth_attr_new();
1a817694ecbd Patch #805613: Fix usage of the PTH library. Martin v. Löwis <martin@v.loewis.de> parents: 21766 diff changeset	43 pth_attr_set(PyThread_attr, PTH_ATTR_STACK_SIZE, 1<<18);
1a817694ecbd Patch #805613: Fix usage of the PTH library. Martin v. Löwis <martin@v.loewis.de> parents: 21766 diff changeset	44 pth_attr_set(PyThread_attr, PTH_ATTR_JOINABLE, FALSE);
12611 b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	45 }
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	46
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	47 /*
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	48 * Thread support.
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	49 */
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	50
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	51
20468 ebfd87e87884 Partial patch from SF #452266, by Jason Petrone. Guido van Rossum <guido@python.org> parents: 15187 diff changeset	52 long PyThread_start_new_thread(void (func)(void ), void *arg)
12611 b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	53 {
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	54 pth_t th;
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	55 dprintf(("PyThread_start_new_thread called\n"));
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	56 if (!initialized)
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	57 PyThread_init_thread();
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	58
30466 1a817694ecbd Patch #805613: Fix usage of the PTH library. Martin v. Löwis <martin@v.loewis.de> parents: 21766 diff changeset	59 th = pth_spawn(PyThread_attr,
13658 f79434ee41fa Mass ANSIfication of function definitions. Doesn't cover all 'extern' Thomas Wouters <thomas@python.org> parents: 13256 diff changeset	60 (void* ()(void ))func,
12611 b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	61 (void *)arg
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	62 );
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	63
20468 ebfd87e87884 Partial patch from SF #452266, by Jason Petrone. Guido van Rossum <guido@python.org> parents: 15187 diff changeset	64 return th;
12611 b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	65 }
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	66
13658 f79434ee41fa Mass ANSIfication of function definitions. Doesn't cover all 'extern' Thomas Wouters <thomas@python.org> parents: 13256 diff changeset	67 long PyThread_get_thread_ident(void)
12611 b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	68 {
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	69 volatile pth_t threadid;
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	70 if (!initialized)
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	71 PyThread_init_thread();
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	72 /* Jump through some hoops for Alpha OSF/1 */
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	73 threadid = pth_self();
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	74 return (long) (long ) &threadid;
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	75 }
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	76
13658 f79434ee41fa Mass ANSIfication of function definitions. Doesn't cover all 'extern' Thomas Wouters <thomas@python.org> parents: 13256 diff changeset	77 static void do_PyThread_exit_thread(int no_cleanup)
12611 b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	78 {
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	79 dprintf(("PyThread_exit_thread called\n"));
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	80 if (!initialized) {
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	81 if (no_cleanup)
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	82 _exit(0);
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	83 else
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	84 exit(0);
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	85 }
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	86 }
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	87
13658 f79434ee41fa Mass ANSIfication of function definitions. Doesn't cover all 'extern' Thomas Wouters <thomas@python.org> parents: 13256 diff changeset	88 void PyThread_exit_thread(void)
12611 b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	89 {
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	90 do_PyThread_exit_thread(0);
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	91 }
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	92
13658 f79434ee41fa Mass ANSIfication of function definitions. Doesn't cover all 'extern' Thomas Wouters <thomas@python.org> parents: 13256 diff changeset	93 void PyThread__exit_thread(void)
12611 b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	94 {
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	95 do_PyThread_exit_thread(1);
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	96 }
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	97
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	98 #ifndef NO_EXIT_PROG
13658 f79434ee41fa Mass ANSIfication of function definitions. Doesn't cover all 'extern' Thomas Wouters <thomas@python.org> parents: 13256 diff changeset	99 static void do_PyThread_exit_prog(int status, int no_cleanup)
12611 b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	100 {
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	101 dprintf(("PyThread_exit_prog(%d) called\n", status));
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	102 if (!initialized)
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	103 if (no_cleanup)
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	104 _exit(status);
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	105 else
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	106 exit(status);
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	107 }
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	108
13658 f79434ee41fa Mass ANSIfication of function definitions. Doesn't cover all 'extern' Thomas Wouters <thomas@python.org> parents: 13256 diff changeset	109 void PyThread_exit_prog(int status)
12611 b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	110 {
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	111 do_PyThread_exit_prog(status, 0);
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	112 }
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	113
13658 f79434ee41fa Mass ANSIfication of function definitions. Doesn't cover all 'extern' Thomas Wouters <thomas@python.org> parents: 13256 diff changeset	114 void PyThread__exit_prog(int status)
12611 b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	115 {
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	116 do_PyThread_exit_prog(status, 1);
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	117 }
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	118 #endif /* NO_EXIT_PROG */
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	119
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	120 /*
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	121 * Lock support.
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	122 */
13658 f79434ee41fa Mass ANSIfication of function definitions. Doesn't cover all 'extern' Thomas Wouters <thomas@python.org> parents: 13256 diff changeset	123 PyThread_type_lock PyThread_allocate_lock(void)
12611 b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	124 {
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	125 pth_lock *lock;
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	126 int status, error = 0;
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	127
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	128 dprintf(("PyThread_allocate_lock called\n"));
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	129 if (!initialized)
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	130 PyThread_init_thread();
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	131
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	132 lock = (pth_lock *) malloc(sizeof(pth_lock));
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	133 memset((void *)lock, '\0', sizeof(pth_lock));
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	134 if (lock) {
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	135 lock->locked = 0;
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	136 status = pth_mutex_init(&lock->mut);
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	137 CHECK_STATUS("pth_mutex_init");
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	138 status = pth_cond_init(&lock->lock_released);
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	139 CHECK_STATUS("pth_cond_init");
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	140 if (error) {
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	141 free((void *)lock);
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	142 lock = NULL;
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	143 }
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	144 }
13210 ff243b0f16ee Trent Mick <trentm@activestate.com>: Fred Drake <fdrake@acm.org> parents: 12611 diff changeset	145 dprintf(("PyThread_allocate_lock() -> %p\n", lock));
12611 b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	146 return (PyThread_type_lock) lock;
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	147 }
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	148
13658 f79434ee41fa Mass ANSIfication of function definitions. Doesn't cover all 'extern' Thomas Wouters <thomas@python.org> parents: 13256 diff changeset	149 void PyThread_free_lock(PyThread_type_lock lock)
12611 b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	150 {
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	151 pth_lock thelock = (pth_lock )lock;
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	152
13210 ff243b0f16ee Trent Mick <trentm@activestate.com>: Fred Drake <fdrake@acm.org> parents: 12611 diff changeset	153 dprintf(("PyThread_free_lock(%p) called\n", lock));
12611 b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	154
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	155 free((void *)thelock);
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	156 }
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	157
13658 f79434ee41fa Mass ANSIfication of function definitions. Doesn't cover all 'extern' Thomas Wouters <thomas@python.org> parents: 13256 diff changeset	158 int PyThread_acquire_lock(PyThread_type_lock lock, int waitflag)
12611 b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	159 {
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	160 int success;
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	161 pth_lock thelock = (pth_lock )lock;
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	162 int status, error = 0;
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	163
13210 ff243b0f16ee Trent Mick <trentm@activestate.com>: Fred Drake <fdrake@acm.org> parents: 12611 diff changeset	164 dprintf(("PyThread_acquire_lock(%p, %d) called\n", lock, waitflag));
12611 b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	165
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	166 status = pth_mutex_acquire(&thelock->mut, !waitflag, NULL);
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	167 CHECK_STATUS("pth_mutex_acquire[1]");
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	168 success = thelock->locked == 0;
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	169 if (success) thelock->locked = 1;
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	170 status = pth_mutex_release( &thelock->mut );
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	171 CHECK_STATUS("pth_mutex_release[1]");
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	172
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	173 if ( !success && waitflag ) {
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	174 /* continue trying until we get the lock */
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	175
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	176 /* mut must be locked by me -- part of the condition
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	177 * protocol */
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	178 status = pth_mutex_acquire( &thelock->mut, !waitflag, NULL );
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	179 CHECK_STATUS("pth_mutex_acquire[2]");
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	180 while ( thelock->locked ) {
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	181 status = pth_cond_await(&thelock->lock_released,
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	182 &thelock->mut, NULL);
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	183 CHECK_STATUS("pth_cond_await");
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	184 }
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	185 thelock->locked = 1;
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	186 status = pth_mutex_release( &thelock->mut );
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	187 CHECK_STATUS("pth_mutex_release[2]");
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	188 success = 1;
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	189 }
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	190 if (error) success = 0;
13210 ff243b0f16ee Trent Mick <trentm@activestate.com>: Fred Drake <fdrake@acm.org> parents: 12611 diff changeset	191 dprintf(("PyThread_acquire_lock(%p, %d) -> %d\n", lock, waitflag, success));
12611 b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	192 return success;
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	193 }
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	194
13658 f79434ee41fa Mass ANSIfication of function definitions. Doesn't cover all 'extern' Thomas Wouters <thomas@python.org> parents: 13256 diff changeset	195 void PyThread_release_lock(PyThread_type_lock lock)
12611 b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	196 {
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	197 pth_lock thelock = (pth_lock )lock;
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	198 int status, error = 0;
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	199
13210 ff243b0f16ee Trent Mick <trentm@activestate.com>: Fred Drake <fdrake@acm.org> parents: 12611 diff changeset	200 dprintf(("PyThread_release_lock(%p) called\n", lock));
12611 b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	201
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	202 status = pth_mutex_acquire( &thelock->mut, 0, NULL );
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	203 CHECK_STATUS("pth_mutex_acquire[3]");
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	204
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	205 thelock->locked = 0;
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	206
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	207 status = pth_mutex_release( &thelock->mut );
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	208 CHECK_STATUS("pth_mutex_release[3]");
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	209
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	210 /* wake up someone (anyone, if any) waiting on the lock */
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	211 status = pth_cond_notify( &thelock->lock_released, 0 );
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	212 CHECK_STATUS("pth_cond_notify");
b320cf3a98b9 Andy Dustman: add GNU pth user-space thread support. Guido van Rossum <guido@python.org> parents: diff changeset	213 }

Mercurial > cpython-lru_cache-weakref

annotate Python/thread_pth.h @ 33940:dfd07b7be407 legacy-trunk