[perl5.git] / thread.h

#if defined(USE_THREADS) || defined(USE_ITHREADS)

#ifdef WIN32
#  include <win32thread.h>
#else
#  ifdef OLD_PTHREADS_API /* Here be dragons. */
#    define DETACH(t) \
    STMT_START {						\
	if (pthread_detach(&(t)->self)) {			\
	    MUTEX_UNLOCK(&(t)->mutex);				\
	    Perl_croak(aTHX_ "panic: DETACH");			\
	}							\
    } STMT_END

#    define PERL_GET_CONTEXT	Perl_get_context()
#    define PERL_SET_CONTEXT(t)	Perl_set_context((void*)t)

#    define PTHREAD_GETSPECIFIC_INT
#    ifdef DJGPP
#      define pthread_addr_t any_t
#      define NEED_PTHREAD_INIT
#      define PTHREAD_CREATE_JOINABLE (1)
#    endif
#    ifdef __OPEN_VM
#      define pthread_addr_t void *
#    endif
#    ifdef VMS
#      define pthread_attr_init(a) pthread_attr_create(a)
#      define PTHREAD_ATTR_SETDETACHSTATE(a,s) pthread_setdetach_np(a,s)
#      define PTHREAD_CREATE(t,a,s,d) pthread_create(t,a,s,d)
#      define pthread_key_create(k,d) pthread_keycreate(k,(pthread_destructor_t)(d))
#      define pthread_mutexattr_init(a) pthread_mutexattr_create(a)
#      define pthread_mutexattr_settype(a,t) pthread_mutexattr_setkind_np(a,t)
#    endif
#    if defined(DJGPP) || defined(__OPEN_VM)
#      define PTHREAD_ATTR_SETDETACHSTATE(a,s) pthread_attr_setdetachstate(a,&(s))
#      define YIELD pthread_yield(NULL)
#    endif
#  endif
#    define pthread_mutexattr_default NULL
#    define pthread_condattr_default  NULL
#endif

#ifndef PTHREAD_CREATE
/* You are not supposed to pass NULL as the 2nd arg of PTHREAD_CREATE(). */
#  define PTHREAD_CREATE(t,a,s,d) pthread_create(t,&(a),s,d)
#endif

#ifndef PTHREAD_ATTR_SETDETACHSTATE
#  define PTHREAD_ATTR_SETDETACHSTATE(a,s) pthread_attr_setdetachstate(a,s)
#endif

#ifndef PTHREAD_CREATE_JOINABLE
#  ifdef OLD_PTHREAD_CREATE_JOINABLE
#    define PTHREAD_CREATE_JOINABLE OLD_PTHREAD_CREATE_JOINABLE
#  else
#    define PTHREAD_CREATE_JOINABLE 0 /* Panic?  No, guess. */
#  endif
#endif

#ifdef I_MACH_CTHREADS

/* cthreads interface */

/* #include <mach/cthreads.h> is in perl.h #ifdef I_MACH_CTHREADS */

#define MUTEX_INIT(m) \
    STMT_START {						\
	*m = mutex_alloc();					\
	if (*m) {						\
	    mutex_init(*m);					\
	} else {						\
	    Perl_croak(aTHX_ "panic: MUTEX_INIT");		\
	}							\
    } STMT_END

#define MUTEX_LOCK(m)			mutex_lock(*m)
#define MUTEX_LOCK_NOCONTEXT(m)		mutex_lock(*m)
#define MUTEX_UNLOCK(m)			mutex_unlock(*m)
#define MUTEX_UNLOCK_NOCONTEXT(m)	mutex_unlock(*m)
#define MUTEX_DESTROY(m) \
    STMT_START {						\
	mutex_free(*m);						\
	*m = 0;							\
    } STMT_END

#define COND_INIT(c) \
    STMT_START {						\
	*c = condition_alloc();					\
	if (*c) {						\
	    condition_init(*c);					\
	}							\
	else {							\
	    Perl_croak(aTHX_ "panic: COND_INIT");		\
	}							\
    } STMT_END

#define COND_SIGNAL(c)		condition_signal(*c)
#define COND_BROADCAST(c)	condition_broadcast(*c)
#define COND_WAIT(c, m)		condition_wait(*c, *m)
#define COND_DESTROY(c) \
    STMT_START {						\
	condition_free(*c);					\
	*c = 0;							\
    } STMT_END

#define THREAD_CREATE(thr, f)	(thr->self = cthread_fork(f, thr), 0)
#define THREAD_POST_CREATE(thr)

#define THREAD_RET_TYPE		any_t
#define THREAD_RET_CAST(x)	((any_t) x)

#define DETACH(t)		cthread_detach(t->self)
#define JOIN(t, avp)		(*(avp) = (AV *)cthread_join(t->self))

#define PERL_SET_CONTEXT(t)	cthread_set_data(cthread_self(), t)
#define PERL_GET_CONTEXT	cthread_data(cthread_self())

#define INIT_THREADS		cthread_init()
#define YIELD			cthread_yield()
#define ALLOC_THREAD_KEY	NOOP
#define SET_THREAD_SELF(thr)	(thr->self = cthread_self())

#endif /* I_MACH_CTHREADS */

#ifndef YIELD
#  ifdef SCHED_YIELD
#    define YIELD SCHED_YIELD
#  else
#    ifdef HAS_SCHED_YIELD
#      define YIELD sched_yield()
#    else
#      ifdef HAS_PTHREAD_YIELD
    /* pthread_yield(NULL) platforms are expected
     * to have #defined YIELD for themselves. */
#        define YIELD pthread_yield()
#      endif
#    endif
#  endif
#endif

#ifdef __hpux
#  define MUTEX_INIT_NEEDS_MUTEX_ZEROED
#endif

#ifndef MUTEX_INIT

#  ifdef MUTEX_INIT_NEEDS_MUTEX_ZEROED
    /* Temporary workaround, true bug is deeper. --jhi 1999-02-25 */
#    define MUTEX_INIT(m) \
    STMT_START {						\
	Zero((m), 1, perl_mutex);                               \
 	if (pthread_mutex_init((m), pthread_mutexattr_default))	\
	    Perl_croak(aTHX_ "panic: MUTEX_INIT");		\
    } STMT_END
#  else
#    define MUTEX_INIT(m) \
    STMT_START {						\
	if (pthread_mutex_init((m), pthread_mutexattr_default))	\
	    Perl_croak(aTHX_ "panic: MUTEX_INIT");		\
    } STMT_END
#  endif

#  define MUTEX_LOCK(m) \
    STMT_START {						\
	if (pthread_mutex_lock((m)))				\
	    Perl_croak(aTHX_ "panic: MUTEX_LOCK");		\
    } STMT_END

#  define MUTEX_UNLOCK(m) \
    STMT_START {						\
	if (pthread_mutex_unlock((m)))				\
	    Perl_croak(aTHX_ "panic: MUTEX_UNLOCK");		\
    } STMT_END

#  define MUTEX_LOCK_NOCONTEXT(m) \
    STMT_START {						\
	if (pthread_mutex_lock((m)))				\
	    Perl_croak_nocontext("panic: MUTEX_LOCK");		\
    } STMT_END

#  define MUTEX_UNLOCK_NOCONTEXT(m) \
    STMT_START {						\
	if (pthread_mutex_unlock((m)))				\
	    Perl_croak_nocontext("panic: MUTEX_UNLOCK");	\
    } STMT_END

#  define MUTEX_DESTROY(m) \
    STMT_START {						\
	if (pthread_mutex_destroy((m)))				\
	    Perl_croak(aTHX_ "panic: MUTEX_DESTROY");		\
    } STMT_END
#endif /* MUTEX_INIT */

#ifndef COND_INIT
#  define COND_INIT(c) \
    STMT_START {						\
	if (pthread_cond_init((c), pthread_condattr_default))	\
	    Perl_croak(aTHX_ "panic: COND_INIT");		\
    } STMT_END

#  define COND_SIGNAL(c) \
    STMT_START {						\
	if (pthread_cond_signal((c)))				\
	    Perl_croak(aTHX_ "panic: COND_SIGNAL");		\
    } STMT_END

#  define COND_BROADCAST(c) \
    STMT_START {						\
	if (pthread_cond_broadcast((c)))			\
	    Perl_croak(aTHX_ "panic: COND_BROADCAST");		\
    } STMT_END

#  define COND_WAIT(c, m) \
    STMT_START {						\
	if (pthread_cond_wait((c), (m)))			\
	    Perl_croak(aTHX_ "panic: COND_WAIT");		\
    } STMT_END

#  define COND_DESTROY(c) \
    STMT_START {						\
	if (pthread_cond_destroy((c)))				\
	    Perl_croak(aTHX_ "panic: COND_DESTROY");		\
    } STMT_END
#endif /* COND_INIT */

/* DETACH(t) must only be called while holding t->mutex */
#ifndef DETACH
#  define DETACH(t) \
    STMT_START {						\
	if (pthread_detach((t)->self)) {			\
	    MUTEX_UNLOCK(&(t)->mutex);				\
	    Perl_croak(aTHX_ "panic: DETACH");			\
	}							\
    } STMT_END
#endif /* DETACH */

#ifndef JOIN
#  define JOIN(t, avp) \
    STMT_START {						\
	if (pthread_join((t)->self, (void**)(avp)))		\
	    Perl_croak(aTHX_ "panic: pthread_join");		\
    } STMT_END
#endif /* JOIN */

#ifndef PERL_GET_CONTEXT
#  define PERL_GET_CONTEXT	pthread_getspecific(PL_thr_key)
#endif

#ifndef PERL_SET_CONTEXT
#  define PERL_SET_CONTEXT(t) \
    STMT_START {						\
	if (pthread_setspecific(PL_thr_key, (void *)(t)))	\
	    Perl_croak(aTHX_ "panic: pthread_setspecific");	\
    } STMT_END
#endif /* PERL_SET_CONTEXT */

#ifndef INIT_THREADS
#  ifdef NEED_PTHREAD_INIT
#    define INIT_THREADS pthread_init()
#  endif
#endif

#ifndef ALLOC_THREAD_KEY
#  define ALLOC_THREAD_KEY \
    STMT_START {						\
	if (pthread_key_create(&PL_thr_key, 0))	{		\
	    fprintf(stderr, "panic: pthread_key_create");	\
	    exit(1);						\
	}							\
    } STMT_END
#endif

#ifndef THREAD_RET_TYPE
#  define THREAD_RET_TYPE	void *
#  define THREAD_RET_CAST(p)	((void *)(p))
#endif /* THREAD_RET */

#if defined(USE_THREADS)

/* Accessor for per-thread SVs */
#  define THREADSV(i) (thr->threadsvp[i])

/*
 * LOCK_SV_MUTEX and UNLOCK_SV_MUTEX are performance-critical. Here, we
 * try only locking them if there may be more than one thread in existence.
 * Systems with very fast mutexes (and/or slow conditionals) may wish to
 * remove the "if (threadnum) ..." test.
 * XXX do NOT use C<if (PL_threadnum) ...> -- it sets up race conditions!
 */
#  define LOCK_SV_MUTEX		MUTEX_LOCK(&PL_sv_mutex)
#  define UNLOCK_SV_MUTEX	MUTEX_UNLOCK(&PL_sv_mutex)
#  define LOCK_STRTAB_MUTEX	MUTEX_LOCK(&PL_strtab_mutex)
#  define UNLOCK_STRTAB_MUTEX	MUTEX_UNLOCK(&PL_strtab_mutex)
#  define LOCK_CRED_MUTEX	MUTEX_LOCK(&PL_cred_mutex)
#  define UNLOCK_CRED_MUTEX	MUTEX_UNLOCK(&PL_cred_mutex)


/* Values and macros for thr->flags */
#define THRf_STATE_MASK	7
#define THRf_R_JOINABLE	0
#define THRf_R_JOINED	1
#define THRf_R_DETACHED	2
#define THRf_ZOMBIE	3
#define THRf_DEAD	4

#define THRf_DID_DIE	8

/* ThrSTATE(t) and ThrSETSTATE(t) must only be called while holding t->mutex */
#define ThrSTATE(t) ((t)->flags & THRf_STATE_MASK)
#define ThrSETSTATE(t, s) STMT_START {		\
	(t)->flags &= ~THRf_STATE_MASK;		\
	(t)->flags |= (s);			\
	DEBUG_S(PerlIO_printf(Perl_debug_log,	\
			      "thread %p set to state %d\n", (t), (s))); \
    } STMT_END

typedef struct condpair {
    perl_mutex	mutex;		/* Protects all other fields */
    perl_cond	owner_cond;	/* For when owner changes at all */
    perl_cond	cond;		/* For cond_signal and cond_broadcast */
    Thread	owner;		/* Currently owning thread */
} condpair_t;

#define MgMUTEXP(mg) (&((condpair_t *)(mg->mg_ptr))->mutex)
#define MgOWNERCONDP(mg) (&((condpair_t *)(mg->mg_ptr))->owner_cond)
#define MgCONDP(mg) (&((condpair_t *)(mg->mg_ptr))->cond)
#define MgOWNER(mg) ((condpair_t *)(mg->mg_ptr))->owner

#endif /* USE_THREADS */
#endif /* USE_THREADS || USE_ITHREADS */

#ifndef MUTEX_LOCK
#  define MUTEX_LOCK(m)
#endif

#ifndef MUTEX_LOCK_NOCONTEXT
#  define MUTEX_LOCK_NOCONTEXT(m)
#endif

#ifndef MUTEX_UNLOCK
#  define MUTEX_UNLOCK(m)
#endif

#ifndef MUTEX_UNLOCK_NOCONTEXT
#  define MUTEX_UNLOCK_NOCONTEXT(m)
#endif

#ifndef MUTEX_INIT
#  define MUTEX_INIT(m)
#endif

#ifndef MUTEX_DESTROY
#  define MUTEX_DESTROY(m)
#endif

#ifndef COND_INIT
#  define COND_INIT(c)
#endif

#ifndef COND_SIGNAL
#  define COND_SIGNAL(c)
#endif

#ifndef COND_BROADCAST
#  define COND_BROADCAST(c)
#endif

#ifndef COND_WAIT
#  define COND_WAIT(c, m)
#endif

#ifndef COND_DESTROY
#  define COND_DESTROY(c)
#endif

#ifndef LOCK_SV_MUTEX
#  define LOCK_SV_MUTEX
#endif

#ifndef UNLOCK_SV_MUTEX
#  define UNLOCK_SV_MUTEX
#endif

#ifndef LOCK_STRTAB_MUTEX
#  define LOCK_STRTAB_MUTEX
#endif

#ifndef UNLOCK_STRTAB_MUTEX
#  define UNLOCK_STRTAB_MUTEX
#endif

#ifndef LOCK_CRED_MUTEX
#  define LOCK_CRED_MUTEX
#endif

#ifndef UNLOCK_CRED_MUTEX
#  define UNLOCK_CRED_MUTEX
#endif

/* THR, SET_THR, and dTHR are there for compatibility with old versions */
#ifndef THR
#  define THR		PERL_GET_THX
#endif

#ifndef SET_THR
#  define SET_THR(t)	PERL_SET_THX(t)
#endif

#ifndef dTHR
#  define dTHR dNOOP
#endif

#ifndef INIT_THREADS
#  define INIT_THREADS NOOP
#endif
Commit	Line	Data
1feb2720	1	#if defined(USE_THREADS) \|\| defined(USE_ITHREADS)
12ca11f6	2
ea0efc06	3	#ifdef WIN32
d55594ae GS	4	# include <win32thread.h>
d55594ae GS	5	#else
0d85d877	6	# ifdef OLD_PTHREADS_API /* Here be dragons. */
ba869deb GS	7	# define DETACH(t) \
	8	STMT_START { \
	9	if (pthread_detach(&(t)->self)) { \
	10	MUTEX_UNLOCK(&(t)->mutex); \
	11	Perl_croak(aTHX_ "panic: DETACH"); \
	12	} \
ea0efc06	13	} STMT_END
ba869deb GS	14
	15	# define PERL_GET_CONTEXT Perl_get_context()
	16	# define PERL_SET_CONTEXT(t) Perl_set_context((void*)t)
	17
0d85d877 JH	18	# define PTHREAD_GETSPECIFIC_INT
	19	# ifdef DJGPP
	20	# define pthread_addr_t any_t
	21	# define NEED_PTHREAD_INIT
6dc3770d	22	# define PTHREAD_CREATE_JOINABLE (1)
0d85d877 JH	23	# endif
	24	# ifdef __OPEN_VM
	25	# define pthread_addr_t void *
	26	# endif
	27	# ifdef VMS
	28	# define pthread_attr_init(a) pthread_attr_create(a)
	29	# define PTHREAD_ATTR_SETDETACHSTATE(a,s) pthread_setdetach_np(a,s)
6dc3770d	30	# define PTHREAD_CREATE(t,a,s,d) pthread_create(t,a,s,d)
0d85d877 JH	31	# define pthread_key_create(k,d) pthread_keycreate(k,(pthread_destructor_t)(d))
0d85d877 JH	32	# define pthread_mutexattr_init(a) pthread_mutexattr_create(a)
9bbd4fab	33	# define pthread_mutexattr_settype(a,t) pthread_mutexattr_setkind_np(a,t)
0d85d877 JH	34	# endif
	35	# if defined(DJGPP) \|\| defined(__OPEN_VM)
	36	# define PTHREAD_ATTR_SETDETACHSTATE(a,s) pthread_attr_setdetachstate(a,&(s))
	37	# define YIELD pthread_yield(NULL)
	38	# endif
0d85d877	39	# endif
1cfa4ec7	40	# define pthread_mutexattr_default NULL
0d85d877	41	# define pthread_condattr_default NULL
0d85d877 JH	42	#endif
	43
	44	#ifndef PTHREAD_CREATE
	45	/* You are not supposed to pass NULL as the 2nd arg of PTHREAD_CREATE(). */
	46	# define PTHREAD_CREATE(t,a,s,d) pthread_create(t,&(a),s,d)
	47	#endif
	48
	49	#ifndef PTHREAD_ATTR_SETDETACHSTATE
	50	# define PTHREAD_ATTR_SETDETACHSTATE(a,s) pthread_attr_setdetachstate(a,s)
d55594ae	51	#endif
1cfa4ec7	52
ef4af2be JH	53	#ifndef PTHREAD_CREATE_JOINABLE
	54	# ifdef OLD_PTHREAD_CREATE_JOINABLE
	55	# define PTHREAD_CREATE_JOINABLE OLD_PTHREAD_CREATE_JOINABLE
	56	# else
	57	# define PTHREAD_CREATE_JOINABLE 0 /* Panic? No, guess. */
	58	# endif
	59	#endif
	60
7f3d1cf1 BH	61	#ifdef I_MACH_CTHREADS
	62
	63	/* cthreads interface */
	64
	65	/* #include <mach/cthreads.h> is in perl.h #ifdef I_MACH_CTHREADS */
	66
ba869deb GS	67	#define MUTEX_INIT(m) \
	68	STMT_START { \
	69	*m = mutex_alloc(); \
	70	if (*m) { \
	71	mutex_init(*m); \
	72	} else { \
	73	Perl_croak(aTHX_ "panic: MUTEX_INIT"); \
	74	} \
	75	} STMT_END
	76
	77	#define MUTEX_LOCK(m) mutex_lock(*m)
	78	#define MUTEX_LOCK_NOCONTEXT(m) mutex_lock(*m)
	79	#define MUTEX_UNLOCK(m) mutex_unlock(*m)
	80	#define MUTEX_UNLOCK_NOCONTEXT(m) mutex_unlock(*m)
	81	#define MUTEX_DESTROY(m) \
	82	STMT_START { \
	83	mutex_free(*m); \
	84	*m = 0; \
	85	} STMT_END
	86
	87	#define COND_INIT(c) \
	88	STMT_START { \
	89	*c = condition_alloc(); \
	90	if (*c) { \
	91	condition_init(*c); \
	92	} \
	93	else { \
	94	Perl_croak(aTHX_ "panic: COND_INIT"); \
	95	} \
	96	} STMT_END
7f3d1cf1 BH	97
	98	#define COND_SIGNAL(c) condition_signal(*c)
	99	#define COND_BROADCAST(c) condition_broadcast(*c)
	100	#define COND_WAIT(c, m) condition_wait(c, m)
ba869deb GS	101	#define COND_DESTROY(c) \
	102	STMT_START { \
	103	condition_free(*c); \
	104	*c = 0; \
	105	} STMT_END
7f3d1cf1 BH	106
	107	#define THREAD_CREATE(thr, f) (thr->self = cthread_fork(f, thr), 0)
	108	#define THREAD_POST_CREATE(thr)
	109
	110	#define THREAD_RET_TYPE any_t
	111	#define THREAD_RET_CAST(x) ((any_t) x)
	112
	113	#define DETACH(t) cthread_detach(t->self)
	114	#define JOIN(t, avp) ((avp) = (AV )cthread_join(t->self))
	115
ba869deb GS	116	#define PERL_SET_CONTEXT(t) cthread_set_data(cthread_self(), t)
ba869deb GS	117	#define PERL_GET_CONTEXT cthread_data(cthread_self())
7f3d1cf1 BH	118
	119	#define INIT_THREADS cthread_init()
	120	#define YIELD cthread_yield()
ba869deb	121	#define ALLOC_THREAD_KEY NOOP
7f3d1cf1 BH	122	#define SET_THREAD_SELF(thr) (thr->self = cthread_self())
	123
	124	#endif /* I_MACH_CTHREADS */
	125
1cfa4ec7	126	#ifndef YIELD
e7a4f449 JH	127	# ifdef SCHED_YIELD
	128	# define YIELD SCHED_YIELD
	129	# else
	130	# ifdef HAS_SCHED_YIELD
	131	# define YIELD sched_yield()
	132	# else
	133	# ifdef HAS_PTHREAD_YIELD
	134	/* pthread_yield(NULL) platforms are expected
	135	* to have #defined YIELD for themselves. */
	136	# define YIELD pthread_yield()
	137	# endif
	138	# endif
	139	# endif
9731c6ca	140	#endif
11343788	141
227c31c3 JH	142	#ifdef __hpux
	143	# define MUTEX_INIT_NEEDS_MUTEX_ZEROED
	144	#endif
	145
ea0efc06	146	#ifndef MUTEX_INIT
ba869deb GS	147
ba869deb GS	148	# ifdef MUTEX_INIT_NEEDS_MUTEX_ZEROED
227c31c3	149	/* Temporary workaround, true bug is deeper. --jhi 1999-02-25 */
ba869deb	150	# define MUTEX_INIT(m) \
227c31c3 JH	151	STMT_START { \
	152	Zero((m), 1, perl_mutex); \
	153	if (pthread_mutex_init((m), pthread_mutexattr_default)) \
ba869deb	154	Perl_croak(aTHX_ "panic: MUTEX_INIT"); \
227c31c3	155	} STMT_END
ba869deb GS	156	# else
ba869deb GS	157	# define MUTEX_INIT(m) \
ea0efc06 MB	158	STMT_START { \
ea0efc06 MB	159	if (pthread_mutex_init((m), pthread_mutexattr_default)) \
ba869deb	160	Perl_croak(aTHX_ "panic: MUTEX_INIT"); \
ea0efc06	161	} STMT_END
ba869deb GS	162	# endif
	163
	164	# define MUTEX_LOCK(m) \
	165	STMT_START { \
	166	if (pthread_mutex_lock((m))) \
cea2e8a9	167	Perl_croak(aTHX_ "panic: MUTEX_LOCK"); \
ea0efc06	168	} STMT_END
ba869deb GS	169
	170	# define MUTEX_UNLOCK(m) \
	171	STMT_START { \
	172	if (pthread_mutex_unlock((m))) \
	173	Perl_croak(aTHX_ "panic: MUTEX_UNLOCK"); \
cea2e8a9	174	} STMT_END
ba869deb GS	175
	176	# define MUTEX_LOCK_NOCONTEXT(m) \
	177	STMT_START { \
	178	if (pthread_mutex_lock((m))) \
	179	Perl_croak_nocontext("panic: MUTEX_LOCK"); \
cea2e8a9	180	} STMT_END
ba869deb GS	181
	182	# define MUTEX_UNLOCK_NOCONTEXT(m) \
	183	STMT_START { \
	184	if (pthread_mutex_unlock((m))) \
	185	Perl_croak_nocontext("panic: MUTEX_UNLOCK"); \
ea0efc06	186	} STMT_END
ba869deb GS	187
	188	# define MUTEX_DESTROY(m) \
	189	STMT_START { \
	190	if (pthread_mutex_destroy((m))) \
	191	Perl_croak(aTHX_ "panic: MUTEX_DESTROY"); \
ea0efc06 MB	192	} STMT_END
	193	#endif /* MUTEX_INIT */
	194
	195	#ifndef COND_INIT
ba869deb	196	# define COND_INIT(c) \
ea0efc06 MB	197	STMT_START { \
ea0efc06 MB	198	if (pthread_cond_init((c), pthread_condattr_default)) \
ba869deb	199	Perl_croak(aTHX_ "panic: COND_INIT"); \
ea0efc06	200	} STMT_END
ba869deb GS	201
	202	# define COND_SIGNAL(c) \
	203	STMT_START { \
	204	if (pthread_cond_signal((c))) \
	205	Perl_croak(aTHX_ "panic: COND_SIGNAL"); \
ea0efc06	206	} STMT_END
ba869deb GS	207
	208	# define COND_BROADCAST(c) \
	209	STMT_START { \
	210	if (pthread_cond_broadcast((c))) \
	211	Perl_croak(aTHX_ "panic: COND_BROADCAST"); \
ea0efc06	212	} STMT_END
ba869deb GS	213
	214	# define COND_WAIT(c, m) \
	215	STMT_START { \
	216	if (pthread_cond_wait((c), (m))) \
cea2e8a9	217	Perl_croak(aTHX_ "panic: COND_WAIT"); \
ea0efc06	218	} STMT_END
ba869deb GS	219
	220	# define COND_DESTROY(c) \
	221	STMT_START { \
	222	if (pthread_cond_destroy((c))) \
	223	Perl_croak(aTHX_ "panic: COND_DESTROY"); \
ea0efc06 MB	224	} STMT_END
ea0efc06 MB	225	#endif /* COND_INIT */
33f46ff6	226
f826a10b	227	/* DETACH(t) must only be called while holding t->mutex */
ea0efc06	228	#ifndef DETACH
ba869deb GS	229	# define DETACH(t) \
	230	STMT_START { \
	231	if (pthread_detach((t)->self)) { \
	232	MUTEX_UNLOCK(&(t)->mutex); \
	233	Perl_croak(aTHX_ "panic: DETACH"); \
	234	} \
ea0efc06 MB	235	} STMT_END
ea0efc06 MB	236	#endif /* DETACH */
33f46ff6	237
ea0efc06	238	#ifndef JOIN
ba869deb GS	239	# define JOIN(t, avp) \
	240	STMT_START { \
	241	if (pthread_join((t)->self, (void**)(avp))) \
cea2e8a9	242	Perl_croak(aTHX_ "panic: pthread_join"); \
ea0efc06 MB	243	} STMT_END
	244	#endif /* JOIN */
	245
ba869deb GS	246	#ifndef PERL_GET_CONTEXT
	247	# define PERL_GET_CONTEXT pthread_getspecific(PL_thr_key)
	248	#endif
	249
	250	#ifndef PERL_SET_CONTEXT
	251	# define PERL_SET_CONTEXT(t) \
	252	STMT_START { \
	253	if (pthread_setspecific(PL_thr_key, (void *)(t))) \
cea2e8a9	254	Perl_croak(aTHX_ "panic: pthread_setspecific"); \
ea0efc06	255	} STMT_END
ba869deb	256	#endif /* PERL_SET_CONTEXT */
ea0efc06	257
1feb2720 GS	258	#ifndef INIT_THREADS
	259	# ifdef NEED_PTHREAD_INIT
	260	# define INIT_THREADS pthread_init()
	261	# endif
0d85d877	262	#endif
ea0efc06	263
ba869deb GS	264	#ifndef ALLOC_THREAD_KEY
	265	# define ALLOC_THREAD_KEY \
	266	STMT_START { \
c44d3fdb GS	267	if (pthread_key_create(&PL_thr_key, 0)) { \
	268	fprintf(stderr, "panic: pthread_key_create"); \
	269	exit(1); \
	270	} \
ba869deb GS	271	} STMT_END
	272	#endif
	273
1feb2720 GS	274	#ifndef THREAD_RET_TYPE
	275	# define THREAD_RET_TYPE void *
	276	# define THREAD_RET_CAST(p) ((void *)(p))
	277	#endif /* THREAD_RET */
	278
	279	#if defined(USE_THREADS)
	280
940cb80d	281	/* Accessor for per-thread SVs */
1feb2720	282	# define THREADSV(i) (thr->threadsvp[i])
940cb80d MB	283
	284	/*
	285	* LOCK_SV_MUTEX and UNLOCK_SV_MUTEX are performance-critical. Here, we
	286	* try only locking them if there may be more than one thread in existence.
	287	* Systems with very fast mutexes (and/or slow conditionals) may wish to
	288	* remove the "if (threadnum) ..." test.
b099ddc0	289	* XXX do NOT use C<if (PL_threadnum) ...> -- it sets up race conditions!
940cb80d	290	*/
1feb2720 GS	291	# define LOCK_SV_MUTEX MUTEX_LOCK(&PL_sv_mutex)
	292	# define UNLOCK_SV_MUTEX MUTEX_UNLOCK(&PL_sv_mutex)
	293	# define LOCK_STRTAB_MUTEX MUTEX_LOCK(&PL_strtab_mutex)
	294	# define UNLOCK_STRTAB_MUTEX MUTEX_UNLOCK(&PL_strtab_mutex)
	295	# define LOCK_CRED_MUTEX MUTEX_LOCK(&PL_cred_mutex)
	296	# define UNLOCK_CRED_MUTEX MUTEX_UNLOCK(&PL_cred_mutex)
ea0efc06	297
11343788	298
33f46ff6	299	/* Values and macros for thr->flags */
605e5515 MB	300	#define THRf_STATE_MASK 7
	301	#define THRf_R_JOINABLE 0
	302	#define THRf_R_JOINED 1
	303	#define THRf_R_DETACHED 2
	304	#define THRf_ZOMBIE 3
	305	#define THRf_DEAD 4
f93b4edd	306
458fb581	307	#define THRf_DID_DIE 8
07b73707	308
f826a10b	309	/* ThrSTATE(t) and ThrSETSTATE(t) must only be called while holding t->mutex */
458fb581	310	#define ThrSTATE(t) ((t)->flags & THRf_STATE_MASK)
f93b4edd	311	#define ThrSETSTATE(t, s) STMT_START { \
605e5515	312	(t)->flags &= ~THRf_STATE_MASK; \
33f46ff6	313	(t)->flags \|= (s); \
bf49b057	314	DEBUG_S(PerlIO_printf(Perl_debug_log, \
605e5515	315	"thread %p set to state %d\n", (t), (s))); \
f93b4edd MB	316	} STMT_END
	317
	318	typedef struct condpair {
f826a10b MB	319	perl_mutex mutex; /* Protects all other fields */
	320	perl_cond owner_cond; /* For when owner changes at all */
	321	perl_cond cond; /* For cond_signal and cond_broadcast */
	322	Thread owner; /* Currently owning thread */
f93b4edd MB	323	} condpair_t;
	324
	325	#define MgMUTEXP(mg) (&((condpair_t *)(mg->mg_ptr))->mutex)
	326	#define MgOWNERCONDP(mg) (&((condpair_t *)(mg->mg_ptr))->owner_cond)
	327	#define MgCONDP(mg) (&((condpair_t *)(mg->mg_ptr))->cond)
	328	#define MgOWNER(mg) ((condpair_t *)(mg->mg_ptr))->owner
	329
11343788	330	#endif /* USE_THREADS */
1feb2720 GS	331	#endif /* USE_THREADS \|\| USE_ITHREADS */
	332
	333	#ifndef MUTEX_LOCK
	334	# define MUTEX_LOCK(m)
	335	#endif
	336
	337	#ifndef MUTEX_LOCK_NOCONTEXT
	338	# define MUTEX_LOCK_NOCONTEXT(m)
	339	#endif
	340
	341	#ifndef MUTEX_UNLOCK
	342	# define MUTEX_UNLOCK(m)
	343	#endif
	344
	345	#ifndef MUTEX_UNLOCK_NOCONTEXT
	346	# define MUTEX_UNLOCK_NOCONTEXT(m)
	347	#endif
	348
	349	#ifndef MUTEX_INIT
	350	# define MUTEX_INIT(m)
	351	#endif
	352
	353	#ifndef MUTEX_DESTROY
	354	# define MUTEX_DESTROY(m)
	355	#endif
	356
	357	#ifndef COND_INIT
	358	# define COND_INIT(c)
	359	#endif
	360
	361	#ifndef COND_SIGNAL
	362	# define COND_SIGNAL(c)
	363	#endif
	364
	365	#ifndef COND_BROADCAST
	366	# define COND_BROADCAST(c)
	367	#endif
	368
	369	#ifndef COND_WAIT
	370	# define COND_WAIT(c, m)
	371	#endif
	372
	373	#ifndef COND_DESTROY
	374	# define COND_DESTROY(c)
	375	#endif
	376
	377	#ifndef LOCK_SV_MUTEX
	378	# define LOCK_SV_MUTEX
	379	#endif
	380
	381	#ifndef UNLOCK_SV_MUTEX
	382	# define UNLOCK_SV_MUTEX
	383	#endif
	384
	385	#ifndef LOCK_STRTAB_MUTEX
	386	# define LOCK_STRTAB_MUTEX
	387	#endif
	388
	389	#ifndef UNLOCK_STRTAB_MUTEX
	390	# define UNLOCK_STRTAB_MUTEX
	391	#endif
	392
	393	#ifndef LOCK_CRED_MUTEX
	394	# define LOCK_CRED_MUTEX
395	#endif
396
397	#ifndef UNLOCK_CRED_MUTEX
398	# define UNLOCK_CRED_MUTEX
399	#endif
400
ba869deb	401	/* THR, SET_THR, and dTHR are there for compatibility with old versions */
1feb2720	402	#ifndef THR
ba869deb GS	403	# define THR PERL_GET_THX
	404	#endif
	405
	406	#ifndef SET_THR
	407	# define SET_THR(t) PERL_SET_THX(t)
1feb2720 GS	408	#endif
	409
	410	#ifndef dTHR
	411	# define dTHR dNOOP
	412	#endif
	413
	414	#ifndef INIT_THREADS
	415	# define INIT_THREADS NOOP
	416	#endif