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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 __VMS
	95	/* Default is 1024 on VAX, 8192 otherwise */
	96	# ifdef __ia64
	97	# define THREAD_CREATE_NEEDS_STACK (48*1024)
	98	# else
	99	# define THREAD_CREATE_NEEDS_STACK (32*1024)
	100	# endif
	101	#endif
	102
	103	#ifdef I_MACH_CTHREADS
	104
	105	/* cthreads interface */
	106
	107	/* #include <mach/cthreads.h> is in perl.h #ifdef I_MACH_CTHREADS */
	108
	109	#define MUTEX_INIT(m) \
	110	STMT_START { \
	111	*m = mutex_alloc(); \
	112	if (*m) { \
	113	mutex_init(*m); \
	114	} else { \
	115	Perl_croak_nocontext("panic: MUTEX_INIT [%s:%d]", \
	116	__FILE__, __LINE__); \
	117	} \
	118	} STMT_END
	119
	120	#define MUTEX_LOCK(m) mutex_lock(*m)
	121	#define MUTEX_UNLOCK(m) mutex_unlock(*m)
	122	#define MUTEX_DESTROY(m) \
	123	STMT_START { \
	124	mutex_free(*m); \
	125	*m = 0; \
	126	} STMT_END
	127
	128	#define COND_INIT(c) \
	129	STMT_START { \
	130	*c = condition_alloc(); \
	131	if (*c) { \
	132	condition_init(*c); \
	133	} \
	134	else { \
	135	Perl_croak_nocontext("panic: COND_INIT [%s:%d]", \
	136	__FILE__, __LINE__); \
	137	} \
	138	} STMT_END
	139
	140	#define COND_SIGNAL(c) condition_signal(*c)
	141	#define COND_BROADCAST(c) condition_broadcast(*c)
	142	#define COND_WAIT(c, m) condition_wait(c, m)
	143	#define COND_DESTROY(c) \
	144	STMT_START { \
	145	condition_free(*c); \
	146	*c = 0; \
	147	} STMT_END
	148
	149	#define THREAD_CREATE(thr, f) (thr->self = cthread_fork(f, thr), 0)
	150	#define THREAD_POST_CREATE(thr)
	151
	152	#define THREAD_RET_TYPE any_t
	153	#define THREAD_RET_CAST(x) ((any_t) x)
	154
	155	#define DETACH(t) cthread_detach(t->self)
	156	#define JOIN(t, avp) (*(avp) = MUTABLE_AV(cthread_join(t->self)))
	157
	158	#define PERL_SET_CONTEXT(t) cthread_set_data(cthread_self(), t)
	159	#define PERL_GET_CONTEXT cthread_data(cthread_self())
	160
	161	#define INIT_THREADS cthread_init()
	162	#define YIELD cthread_yield()
	163	#define ALLOC_THREAD_KEY NOOP
	164	#define FREE_THREAD_KEY NOOP
	165	#define SET_THREAD_SELF(thr) (thr->self = cthread_self())
	166
	167	#endif /* I_MACH_CTHREADS */
	168
	169	#ifndef YIELD
	170	# ifdef SCHED_YIELD
	171	# define YIELD SCHED_YIELD
	172	# else
	173	# ifdef HAS_SCHED_YIELD
	174	# define YIELD sched_yield()
	175	# else
	176	# ifdef HAS_PTHREAD_YIELD
	177	/* pthread_yield(NULL) platforms are expected
	178	* to have #defined YIELD for themselves. */
	179	# define YIELD pthread_yield()
	180	# endif
	181	# endif
	182	# endif
	183	#endif
	184
	185	#ifdef __hpux
	186	# define MUTEX_INIT_NEEDS_MUTEX_ZEROED
	187	#endif
	188
	189	#ifndef MUTEX_INIT
	190
	191	# ifdef MUTEX_INIT_NEEDS_MUTEX_ZEROED
	192	/* Temporary workaround, true bug is deeper. --jhi 1999-02-25 */
	193	# define MUTEX_INIT(m) \
	194	STMT_START { \
	195	int _eC_; \
	196	Zero((m), 1, perl_mutex); \
	197	if ((_eC_ = pthread_mutex_init((m), pthread_mutexattr_default))) \
	198	Perl_croak_nocontext("panic: MUTEX_INIT (%d) [%s:%d]", \
	199	_eC_, __FILE__, __LINE__); \
	200	} STMT_END
	201	# else
	202	# define MUTEX_INIT(m) \
	203	STMT_START { \
	204	int _eC_; \
	205	if ((_eC_ = pthread_mutex_init((m), pthread_mutexattr_default))) \
	206	Perl_croak_nocontext("panic: MUTEX_INIT (%d) [%s:%d]", \
	207	_eC_, __FILE__, __LINE__); \
	208	} STMT_END
	209	# endif
	210
	211	# define MUTEX_LOCK(m) \
	212	STMT_START { \
	213	int _eC_; \
	214	if ((_eC_ = pthread_mutex_lock((m)))) \
	215	Perl_croak_nocontext("panic: MUTEX_LOCK (%d) [%s:%d]", \
	216	_eC_, __FILE__, __LINE__); \
	217	} STMT_END
	218
	219	# define MUTEX_UNLOCK(m) \
	220	STMT_START { \
	221	int _eC_; \
	222	if ((_eC_ = pthread_mutex_unlock((m)))) \
	223	Perl_croak_nocontext("panic: MUTEX_UNLOCK (%d) [%s:%d]", \
	224	_eC_, __FILE__, __LINE__); \
	225	} STMT_END
	226
	227	# define MUTEX_DESTROY(m) \
	228	STMT_START { \
	229	int _eC_; \
	230	if ((_eC_ = pthread_mutex_destroy((m)))) \
	231	Perl_croak_nocontext("panic: MUTEX_DESTROY (%d) [%s:%d]", \
	232	_eC_, __FILE__, __LINE__); \
	233	} STMT_END
	234	#endif /* MUTEX_INIT */
	235
	236	#ifndef COND_INIT
	237	# define COND_INIT(c) \
	238	STMT_START { \
	239	int _eC_; \
	240	if ((_eC_ = pthread_cond_init((c), pthread_condattr_default))) \
	241	Perl_croak_nocontext("panic: COND_INIT (%d) [%s:%d]", \
	242	_eC_, __FILE__, __LINE__); \
	243	} STMT_END
	244
	245	# define COND_SIGNAL(c) \
	246	STMT_START { \
	247	int _eC_; \
	248	if ((_eC_ = pthread_cond_signal((c)))) \
	249	Perl_croak_nocontext("panic: COND_SIGNAL (%d) [%s:%d]", \
	250	_eC_, __FILE__, __LINE__); \
	251	} STMT_END
	252
	253	# define COND_BROADCAST(c) \
	254	STMT_START { \
	255	int _eC_; \
	256	if ((_eC_ = pthread_cond_broadcast((c)))) \
	257	Perl_croak_nocontext("panic: COND_BROADCAST (%d) [%s:%d]", \
	258	_eC_, __FILE__, __LINE__); \
	259	} STMT_END
	260
	261	# define COND_WAIT(c, m) \
	262	STMT_START { \
	263	int _eC_; \
	264	if ((_eC_ = pthread_cond_wait((c), (m)))) \
	265	Perl_croak_nocontext("panic: COND_WAIT (%d) [%s:%d]", \
	266	_eC_, __FILE__, __LINE__); \
	267	} STMT_END
	268
	269	# define COND_DESTROY(c) \
	270	STMT_START { \
	271	int _eC_; \
	272	if ((_eC_ = pthread_cond_destroy((c)))) \
	273	Perl_croak_nocontext("panic: COND_DESTROY (%d) [%s:%d]", \
	274	_eC_, __FILE__, __LINE__); \
	275	} STMT_END
	276	#endif /* COND_INIT */
	277
	278	/* DETACH(t) must only be called while holding t->mutex */
	279	#ifndef DETACH
	280	# define DETACH(t) \
	281	STMT_START { \
	282	int _eC_; \
	283	if ((_eC_ = pthread_detach((t)->self))) { \
	284	MUTEX_UNLOCK(&(t)->mutex); \
	285	Perl_croak_nocontext("panic: DETACH (%d) [%s:%d]", \
	286	_eC_, __FILE__, __LINE__); \
	287	} \
	288	} STMT_END
	289	#endif /* DETACH */
	290
	291	#ifndef JOIN
	292	# define JOIN(t, avp) \
	293	STMT_START { \
	294	int _eC_; \
	295	if ((_eC_ = pthread_join((t)->self, (void**)(avp)))) \
	296	Perl_croak_nocontext("panic: pthread_join (%d) [%s:%d]", \
	297	_eC_, __FILE__, __LINE__); \
	298	} STMT_END
	299	#endif /* JOIN */
	300
	301	/* Use an unchecked fetch of thread-specific data instead of a checked one.
	302	* It would fail if the key were bogus, but if the key were bogus then
	303	* Really Bad Things would be happening anyway. --dan */
	304	#if (defined(__ALPHA) && (__VMS_VER >= 70000000)) \|\| \
	305	(defined(__alpha) && defined(__osf__) && !defined(__GNUC__)) /* Available only on >= 4.0 */
	306	# define HAS_PTHREAD_UNCHECKED_GETSPECIFIC_NP /* Configure test needed */
	307	#endif
	308
	309	#ifdef HAS_PTHREAD_UNCHECKED_GETSPECIFIC_NP
	310	# define PTHREAD_GETSPECIFIC(key) pthread_unchecked_getspecific_np(key)
	311	#else
	312	# define PTHREAD_GETSPECIFIC(key) pthread_getspecific(key)
	313	#endif
	314
	315	#ifndef PERL_GET_CONTEXT
	316	# define PERL_GET_CONTEXT PTHREAD_GETSPECIFIC(PL_thr_key)
	317	#endif
	318
	319	#ifndef PERL_SET_CONTEXT
	320	# define PERL_SET_CONTEXT(t) \
	321	STMT_START { \
	322	int _eC_; \
	323	if ((_eC_ = pthread_setspecific(PL_thr_key, (void *)(t)))) \
	324	Perl_croak_nocontext("panic: pthread_setspecific (%d) [%s:%d]", \
	325	_eC_, __FILE__, __LINE__); \
	326	} STMT_END
	327	#endif /* PERL_SET_CONTEXT */
	328
	329	#ifndef INIT_THREADS
	330	# ifdef NEED_PTHREAD_INIT
	331	# define INIT_THREADS pthread_init()
	332	# endif
	333	#endif
	334
	335	#ifndef ALLOC_THREAD_KEY
	336	# define ALLOC_THREAD_KEY \
	337	STMT_START { \
	338	if (pthread_key_create(&PL_thr_key, 0)) { \
	339	write(2, STR_WITH_LEN("panic: pthread_key_create failed\n")); \
	340	exit(1); \
	341	} \
	342	} STMT_END
	343	#endif
	344
	345	#ifndef FREE_THREAD_KEY
	346	# define FREE_THREAD_KEY \
	347	STMT_START { \
	348	pthread_key_delete(PL_thr_key); \
	349	} STMT_END
	350	#endif
	351
	352	#ifndef PTHREAD_ATFORK
	353	# ifdef HAS_PTHREAD_ATFORK
	354	# define PTHREAD_ATFORK(prepare,parent,child) \
	355	pthread_atfork(prepare,parent,child)
	356	# else
	357	# define PTHREAD_ATFORK(prepare,parent,child) \
	358	NOOP
	359	# endif
	360	#endif
	361
	362	#ifndef THREAD_RET_TYPE
	363	# define THREAD_RET_TYPE void *
	364	# define THREAD_RET_CAST(p) ((void *)(p))
	365	#endif /* THREAD_RET */
	366
	367	# define LOCK_DOLLARZERO_MUTEX MUTEX_LOCK(&PL_dollarzero_mutex)
	368	# define UNLOCK_DOLLARZERO_MUTEX MUTEX_UNLOCK(&PL_dollarzero_mutex)
	369
	370	#endif /* USE_ITHREADS */
	371
	372	#ifndef MUTEX_LOCK
	373	# define MUTEX_LOCK(m)
	374	#endif
	375
	376	#ifndef MUTEX_UNLOCK
	377	# define MUTEX_UNLOCK(m)
	378	#endif
	379
	380	#ifndef MUTEX_INIT
	381	# define MUTEX_INIT(m)
	382	#endif
	383
	384	#ifndef MUTEX_DESTROY
	385	# define MUTEX_DESTROY(m)
	386	#endif
	387
	388	#ifndef COND_INIT
	389	# define COND_INIT(c)
	390	#endif
	391
	392	#ifndef COND_SIGNAL
	393	# define COND_SIGNAL(c)
	394	#endif
	395
	396	#ifndef COND_BROADCAST
	397	# define COND_BROADCAST(c)
	398	#endif
	399
	400	#ifndef COND_WAIT
	401	# define COND_WAIT(c, m)
	402	#endif
	403
	404	#ifndef COND_DESTROY
	405	# define COND_DESTROY(c)
	406	#endif
	407
	408	#ifndef LOCK_DOLLARZERO_MUTEX
	409	# define LOCK_DOLLARZERO_MUTEX
	410	#endif
	411
	412	#ifndef UNLOCK_DOLLARZERO_MUTEX
	413	# define UNLOCK_DOLLARZERO_MUTEX
	414	#endif
	415
	416	/* THR, SET_THR, and dTHR are there for compatibility with old versions */
	417	#ifndef THR
	418	# define THR PERL_GET_THX
	419	#endif
	420
	421	#ifndef SET_THR
	422	# define SET_THR(t) PERL_SET_THX(t)
	423	#endif
	424
	425	#ifndef dTHR
	426	# define dTHR dNOOP
	427	#endif
	428
	429	#ifndef INIT_THREADS
	430	# define INIT_THREADS NOOP
	431	#endif
	432
	433	/*
	434	* Local variables:
	435	* c-indentation-style: bsd
	436	* c-basic-offset: 4
	437	* indent-tabs-mode: nil
	438	* End:
	439	*
	440	* ex: set ts=8 sts=4 sw=4 et:
	441	*/