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Commit	Line	Data
	1	/* thread.h
	2	*
	3	* Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
	4	* by Larry Wall and others
	5	*
	6	* You may distribute under the terms of either the GNU General Public
	7	* License or the Artistic License, as specified in the README file.
	8	*
	9	*/
	10
	11	#if defined(USE_ITHREADS)
	12
	13	#if defined(VMS)
	14	#include <builtins.h>
	15	#endif
	16
	17	#ifdef WIN32
	18	# include <win32thread.h>
	19	#else
	20	#ifdef NETWARE
	21	# include <nw5thread.h>
	22	#else
	23	# ifdef OLD_PTHREADS_API /* Here be dragons. */
	24	# define DETACH(t) \
	25	STMT_START { \
	26	int _eC_; \
	27	if ((_eC_ = pthread_detach(&(t)->self))) { \
	28	MUTEX_UNLOCK(&(t)->mutex); \
	29	Perl_croak_nocontext("panic: DETACH (%d) [%s:%d]", \
	30	_eC_, __FILE__, __LINE__); \
	31	} \
	32	} STMT_END
	33
	34	# define PERL_GET_CONTEXT Perl_get_context()
	35	# define PERL_SET_CONTEXT(t) Perl_set_context((void*)t)
	36
	37	# define PTHREAD_GETSPECIFIC_INT
	38	# ifdef DJGPP
	39	# define pthread_addr_t any_t
	40	# define NEED_PTHREAD_INIT
	41	# define PTHREAD_CREATE_JOINABLE (1)
	42	# endif
	43	# ifdef OEMVS
	44	# define pthread_addr_t void *
	45	# define pthread_create(t,a,s,d) pthread_create(t,&(a),s,d)
	46	# define pthread_keycreate pthread_key_create
	47	# endif
	48	# ifdef VMS
	49	# define pthread_attr_init(a) pthread_attr_create(a)
	50	# define PTHREAD_ATTR_SETDETACHSTATE(a,s) pthread_setdetach_np(a,s)
	51	# define PTHREAD_CREATE(t,a,s,d) pthread_create(t,a,s,d)
	52	# define pthread_key_create(k,d) pthread_keycreate(k,(pthread_destructor_t)(d))
	53	# define pthread_mutexattr_init(a) pthread_mutexattr_create(a)
	54	# define pthread_mutexattr_settype(a,t) pthread_mutexattr_setkind_np(a,t)
	55	# endif
	56	# if defined(__hpux) && defined(__ux_version) && __ux_version <= 1020
	57	# define pthread_attr_init(a) pthread_attr_create(a)
	58	/* XXX pthread_setdetach_np() missing in DCE threads on HP-UX 10.20 */
	59	# define PTHREAD_ATTR_SETDETACHSTATE(a,s) (0)
	60	# define PTHREAD_CREATE(t,a,s,d) pthread_create(t,a,s,d)
	61	# define pthread_key_create(k,d) pthread_keycreate(k,(pthread_destructor_t)(d))
	62	# define pthread_mutexattr_init(a) pthread_mutexattr_create(a)
	63	# define pthread_mutexattr_settype(a,t) pthread_mutexattr_setkind_np(a,t)
	64	# endif
	65	# if defined(DJGPP) \|\| defined(OEMVS)
	66	# define PTHREAD_ATTR_SETDETACHSTATE(a,s) pthread_attr_setdetachstate(a,&(s))
	67	# define YIELD pthread_yield(NULL)
	68	# endif
	69	# endif
	70	# if !defined(__hpux) \|\| !defined(__ux_version) \|\| __ux_version > 1020
	71	# define pthread_mutexattr_default NULL
	72	# define pthread_condattr_default NULL
	73	# endif
	74	#endif /* NETWARE */
	75	#endif
	76
	77	#ifndef PTHREAD_CREATE
	78	/* You are not supposed to pass NULL as the 2nd arg of PTHREAD_CREATE(). */
	79	# define PTHREAD_CREATE(t,a,s,d) pthread_create(t,&(a),s,d)
	80	#endif
	81
	82	#ifndef PTHREAD_ATTR_SETDETACHSTATE
	83	# define PTHREAD_ATTR_SETDETACHSTATE(a,s) pthread_attr_setdetachstate(a,s)
	84	#endif
	85
	86	#ifndef PTHREAD_CREATE_JOINABLE
	87	# ifdef OLD_PTHREAD_CREATE_JOINABLE
	88	# define PTHREAD_CREATE_JOINABLE OLD_PTHREAD_CREATE_JOINABLE
	89	# else
	90	# define PTHREAD_CREATE_JOINABLE 0 /* Panic? No, guess. */
	91	# endif
	92	#endif
	93
	94	#ifdef DGUX
	95	# define THREAD_CREATE_NEEDS_STACK (32*1024)
	96	#endif
	97
	98	#ifdef __VMS
	99	/* Default is 1024 on VAX, 8192 otherwise */
	100	# ifdef __ia64
	101	# define THREAD_CREATE_NEEDS_STACK (48*1024)
	102	# else
	103	# define THREAD_CREATE_NEEDS_STACK (32*1024)
	104	# endif
	105	#endif
	106
	107	#ifdef I_MACH_CTHREADS
	108
	109	/* cthreads interface */
	110
	111	/* #include <mach/cthreads.h> is in perl.h #ifdef I_MACH_CTHREADS */
	112
	113	#define MUTEX_INIT(m) \
	114	STMT_START { \
	115	*m = mutex_alloc(); \
	116	if (*m) { \
	117	mutex_init(*m); \
	118	} else { \
	119	Perl_croak_nocontext("panic: MUTEX_INIT [%s:%d]", \
	120	__FILE__, __LINE__); \
	121	} \
	122	} STMT_END
	123
	124	#define MUTEX_LOCK(m) mutex_lock(*m)
	125	#define MUTEX_UNLOCK(m) mutex_unlock(*m)
	126	#define MUTEX_DESTROY(m) \
	127	STMT_START { \
	128	mutex_free(*m); \
	129	*m = 0; \
	130	} STMT_END
	131
	132	#define COND_INIT(c) \
	133	STMT_START { \
	134	*c = condition_alloc(); \
	135	if (*c) { \
	136	condition_init(*c); \
	137	} \
	138	else { \
	139	Perl_croak_nocontext("panic: COND_INIT [%s:%d]", \
	140	__FILE__, __LINE__); \
	141	} \
	142	} STMT_END
	143
	144	#define COND_SIGNAL(c) condition_signal(*c)
	145	#define COND_BROADCAST(c) condition_broadcast(*c)
	146	#define COND_WAIT(c, m) condition_wait(c, m)
	147	#define COND_DESTROY(c) \
	148	STMT_START { \
	149	condition_free(*c); \
	150	*c = 0; \
	151	} STMT_END
	152
	153	#define THREAD_CREATE(thr, f) (thr->self = cthread_fork(f, thr), 0)
	154	#define THREAD_POST_CREATE(thr)
	155
	156	#define THREAD_RET_TYPE any_t
	157	#define THREAD_RET_CAST(x) ((any_t) x)
	158
	159	#define DETACH(t) cthread_detach(t->self)
	160	#define JOIN(t, avp) (*(avp) = MUTABLE_AV(cthread_join(t->self)))
	161
	162	#define PERL_SET_CONTEXT(t) cthread_set_data(cthread_self(), t)
	163	#define PERL_GET_CONTEXT cthread_data(cthread_self())
	164
	165	#define INIT_THREADS cthread_init()
	166	#define YIELD cthread_yield()
	167	#define ALLOC_THREAD_KEY NOOP
	168	#define FREE_THREAD_KEY NOOP
	169	#define SET_THREAD_SELF(thr) (thr->self = cthread_self())
	170
	171	#endif /* I_MACH_CTHREADS */
	172
	173	#ifndef YIELD
	174	# ifdef SCHED_YIELD
	175	# define YIELD SCHED_YIELD
	176	# else
	177	# ifdef HAS_SCHED_YIELD
	178	# define YIELD sched_yield()
	179	# else
	180	# ifdef HAS_PTHREAD_YIELD
	181	/* pthread_yield(NULL) platforms are expected
	182	* to have #defined YIELD for themselves. */
	183	# define YIELD pthread_yield()
	184	# endif
	185	# endif
	186	# endif
	187	#endif
	188
	189	#ifdef __hpux
	190	# define MUTEX_INIT_NEEDS_MUTEX_ZEROED
	191	#endif
	192
	193	#ifndef MUTEX_INIT
	194
	195	# ifdef MUTEX_INIT_NEEDS_MUTEX_ZEROED
	196	/* Temporary workaround, true bug is deeper. --jhi 1999-02-25 */
	197	# define MUTEX_INIT(m) \
	198	STMT_START { \
	199	int _eC_; \
	200	Zero((m), 1, perl_mutex); \
	201	if ((_eC_ = pthread_mutex_init((m), pthread_mutexattr_default))) \
	202	Perl_croak_nocontext("panic: MUTEX_INIT (%d) [%s:%d]", \
	203	_eC_, __FILE__, __LINE__); \
	204	} STMT_END
	205	# else
	206	# define MUTEX_INIT(m) \
	207	STMT_START { \
	208	int _eC_; \
	209	if ((_eC_ = pthread_mutex_init((m), pthread_mutexattr_default))) \
	210	Perl_croak_nocontext("panic: MUTEX_INIT (%d) [%s:%d]", \
	211	_eC_, __FILE__, __LINE__); \
	212	} STMT_END
	213	# endif
	214
	215	# define MUTEX_LOCK(m) \
	216	STMT_START { \
	217	int _eC_; \
	218	if ((_eC_ = pthread_mutex_lock((m)))) \
	219	Perl_croak_nocontext("panic: MUTEX_LOCK (%d) [%s:%d]", \
	220	_eC_, __FILE__, __LINE__); \
	221	} STMT_END
	222
	223	# define MUTEX_UNLOCK(m) \
	224	STMT_START { \
	225	int _eC_; \
	226	if ((_eC_ = pthread_mutex_unlock((m)))) \
	227	Perl_croak_nocontext("panic: MUTEX_UNLOCK (%d) [%s:%d]", \
	228	_eC_, __FILE__, __LINE__); \
	229	} STMT_END
	230
	231	# define MUTEX_DESTROY(m) \
	232	STMT_START { \
	233	int _eC_; \
	234	if ((_eC_ = pthread_mutex_destroy((m)))) \
	235	Perl_croak_nocontext("panic: MUTEX_DESTROY (%d) [%s:%d]", \
	236	_eC_, __FILE__, __LINE__); \
	237	} STMT_END
	238	#endif /* MUTEX_INIT */
	239
	240	#ifndef COND_INIT
	241	# define COND_INIT(c) \
	242	STMT_START { \
	243	int _eC_; \
	244	if ((_eC_ = pthread_cond_init((c), pthread_condattr_default))) \
	245	Perl_croak_nocontext("panic: COND_INIT (%d) [%s:%d]", \
	246	_eC_, __FILE__, __LINE__); \
	247	} STMT_END
	248
	249	# define COND_SIGNAL(c) \
	250	STMT_START { \
	251	int _eC_; \
	252	if ((_eC_ = pthread_cond_signal((c)))) \
	253	Perl_croak_nocontext("panic: COND_SIGNAL (%d) [%s:%d]", \
	254	_eC_, __FILE__, __LINE__); \
	255	} STMT_END
	256
	257	# define COND_BROADCAST(c) \
	258	STMT_START { \
	259	int _eC_; \
	260	if ((_eC_ = pthread_cond_broadcast((c)))) \
	261	Perl_croak_nocontext("panic: COND_BROADCAST (%d) [%s:%d]", \
	262	_eC_, __FILE__, __LINE__); \
	263	} STMT_END
	264
	265	# define COND_WAIT(c, m) \
	266	STMT_START { \
	267	int _eC_; \
	268	if ((_eC_ = pthread_cond_wait((c), (m)))) \
	269	Perl_croak_nocontext("panic: COND_WAIT (%d) [%s:%d]", \
	270	_eC_, __FILE__, __LINE__); \
	271	} STMT_END
	272
	273	# define COND_DESTROY(c) \
	274	STMT_START { \
	275	int _eC_; \
	276	if ((_eC_ = pthread_cond_destroy((c)))) \
	277	Perl_croak_nocontext("panic: COND_DESTROY (%d) [%s:%d]", \
	278	_eC_, __FILE__, __LINE__); \
	279	} STMT_END
	280	#endif /* COND_INIT */
	281
	282	/* DETACH(t) must only be called while holding t->mutex */
	283	#ifndef DETACH
	284	# define DETACH(t) \
	285	STMT_START { \
	286	int _eC_; \
	287	if ((_eC_ = pthread_detach((t)->self))) { \
	288	MUTEX_UNLOCK(&(t)->mutex); \
	289	Perl_croak_nocontext("panic: DETACH (%d) [%s:%d]", \
	290	_eC_, __FILE__, __LINE__); \
	291	} \
	292	} STMT_END
	293	#endif /* DETACH */
	294
	295	#ifndef JOIN
	296	# define JOIN(t, avp) \
	297	STMT_START { \
	298	int _eC_; \
	299	if ((_eC_ = pthread_join((t)->self, (void**)(avp)))) \
	300	Perl_croak_nocontext("panic: pthread_join (%d) [%s:%d]", \
	301	_eC_, __FILE__, __LINE__); \
	302	} STMT_END
	303	#endif /* JOIN */
	304
	305	/* Use an unchecked fetch of thread-specific data instead of a checked one.
	306	* It would fail if the key were bogus, but if the key were bogus then
	307	* Really Bad Things would be happening anyway. --dan */
	308	#if (defined(__ALPHA) && (__VMS_VER >= 70000000)) \|\| \
	309	(defined(__alpha) && defined(__osf__) && !defined(__GNUC__)) /* Available only on >= 4.0 */
	310	# define HAS_PTHREAD_UNCHECKED_GETSPECIFIC_NP /* Configure test needed */
	311	#endif
	312
	313	#ifdef HAS_PTHREAD_UNCHECKED_GETSPECIFIC_NP
	314	# define PTHREAD_GETSPECIFIC(key) pthread_unchecked_getspecific_np(key)
	315	#else
	316	# define PTHREAD_GETSPECIFIC(key) pthread_getspecific(key)
	317	#endif
	318
	319	#ifndef PERL_GET_CONTEXT
	320	# define PERL_GET_CONTEXT PTHREAD_GETSPECIFIC(PL_thr_key)
	321	#endif
	322
	323	#ifndef PERL_SET_CONTEXT
	324	# define PERL_SET_CONTEXT(t) \
	325	STMT_START { \
	326	int _eC_; \
	327	if ((_eC_ = pthread_setspecific(PL_thr_key, (void *)(t)))) \
	328	Perl_croak_nocontext("panic: pthread_setspecific (%d) [%s:%d]", \
	329	_eC_, __FILE__, __LINE__); \
	330	} STMT_END
	331	#endif /* PERL_SET_CONTEXT */
	332
	333	#ifndef INIT_THREADS
	334	# ifdef NEED_PTHREAD_INIT
	335	# define INIT_THREADS pthread_init()
	336	# endif
	337	#endif
	338
	339	#ifndef ALLOC_THREAD_KEY
	340	# define ALLOC_THREAD_KEY \
	341	STMT_START { \
	342	if (pthread_key_create(&PL_thr_key, 0)) { \
	343	write(2, STR_WITH_LEN("panic: pthread_key_create failed\n")); \
	344	exit(1); \
	345	} \
	346	} STMT_END
	347	#endif
	348
	349	#ifndef FREE_THREAD_KEY
	350	# define FREE_THREAD_KEY \
	351	STMT_START { \
	352	pthread_key_delete(PL_thr_key); \
	353	} STMT_END
	354	#endif
	355
	356	#ifndef PTHREAD_ATFORK
	357	# ifdef HAS_PTHREAD_ATFORK
	358	# define PTHREAD_ATFORK(prepare,parent,child) \
	359	pthread_atfork(prepare,parent,child)
	360	# else
	361	# define PTHREAD_ATFORK(prepare,parent,child) \
	362	NOOP
	363	# endif
	364	#endif
	365
	366	#ifndef THREAD_RET_TYPE
	367	# define THREAD_RET_TYPE void *
	368	# define THREAD_RET_CAST(p) ((void *)(p))
	369	#endif /* THREAD_RET */
	370
	371	# define LOCK_DOLLARZERO_MUTEX MUTEX_LOCK(&PL_dollarzero_mutex)
	372	# define UNLOCK_DOLLARZERO_MUTEX MUTEX_UNLOCK(&PL_dollarzero_mutex)
	373
	374	#endif /* USE_ITHREADS */
	375
	376	#ifndef MUTEX_LOCK
	377	# define MUTEX_LOCK(m)
	378	#endif
	379
	380	#ifndef MUTEX_UNLOCK
	381	# define MUTEX_UNLOCK(m)
	382	#endif
	383
	384	#ifndef MUTEX_INIT
	385	# define MUTEX_INIT(m)
	386	#endif
	387
	388	#ifndef MUTEX_DESTROY
	389	# define MUTEX_DESTROY(m)
	390	#endif
	391
	392	#ifndef COND_INIT
	393	# define COND_INIT(c)
	394	#endif
	395
	396	#ifndef COND_SIGNAL
	397	# define COND_SIGNAL(c)
	398	#endif
	399
	400	#ifndef COND_BROADCAST
	401	# define COND_BROADCAST(c)
	402	#endif
	403
	404	#ifndef COND_WAIT
	405	# define COND_WAIT(c, m)
	406	#endif
	407
	408	#ifndef COND_DESTROY
	409	# define COND_DESTROY(c)
	410	#endif
	411
	412	#ifndef LOCK_DOLLARZERO_MUTEX
	413	# define LOCK_DOLLARZERO_MUTEX
	414	#endif
	415
	416	#ifndef UNLOCK_DOLLARZERO_MUTEX
	417	# define UNLOCK_DOLLARZERO_MUTEX
	418	#endif
	419
	420	/* THR, SET_THR, and dTHR are there for compatibility with old versions */
	421	#ifndef THR
	422	# define THR PERL_GET_THX
	423	#endif
	424
	425	#ifndef SET_THR
	426	# define SET_THR(t) PERL_SET_THX(t)
	427	#endif
	428
	429	#ifndef dTHR
	430	# define dTHR dNOOP
	431	#endif
	432
	433	#ifndef INIT_THREADS
	434	# define INIT_THREADS NOOP
	435	#endif
	436
	437	/*
	438	* Local variables:
	439	* c-indentation-style: bsd
	440	* c-basic-offset: 4
	441	* indent-tabs-mode: nil
	442	* End:
	443	*
	444	* ex: set ts=8 sts=4 sw=4 et:
	445	*/