[p5sagit/p5-mst-13.2.git] / thread.h

#ifdef USE_THREADS

#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 THR getTHR()
struct perl_thread *getTHR (void);
#    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
#  ifndef VMS
#    define pthread_mutexattr_default NULL
#    define pthread_condattr_default  NULL
#  endif
#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_UNLOCK(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 SET_THR(thr)		cthread_set_data(cthread_self(), thr)
#define THR			cthread_data(cthread_self())

#define INIT_THREADS		cthread_init()
#define YIELD			cthread_yield()
#define ALLOC_THREAD_KEY
#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 SET_THR
#define SET_THR(t)					\
    STMT_START {					\
	if (pthread_setspecific(PL_thr_key, (void *) (t)))	\
	    Perl_croak(aTHX_ "panic: pthread_setspecific");	\
    } STMT_END
#endif /* SET_THR */

#ifndef THR
#define THR ((struct perl_thread *) pthread_getspecific(PL_thr_key))
#endif

/*
 * dTHR is performance-critical. Here, we only do the pthread_get_specific
 * if there may be more than one thread in existence, otherwise we get thr
 * from thrsv which is cached in the per-interpreter structure.
 * Systems with very fast pthread_get_specific (which should be all systems
 * but unfortunately isn't) may wish to simplify to "...*thr = THR".
 *
 * The use of PL_threadnum should be safe here.
 */
#ifndef dTHR
#  define dTHR \
    struct perl_thread *thr = PL_threadnum? THR : (struct perl_thread*)SvPVX(PL_thrsv)
#endif /* dTHR */

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

/* 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				\
    STMT_START {				\
	MUTEX_LOCK(&PL_sv_mutex);		\
    } STMT_END

#define UNLOCK_SV_MUTEX				\
    STMT_START {				\
	MUTEX_UNLOCK(&PL_sv_mutex);		\
    } STMT_END

/* Likewise for strtab_mutex */
#define LOCK_STRTAB_MUTEX			\
    STMT_START {				\
	MUTEX_LOCK(&PL_strtab_mutex);		\
    } STMT_END

#define UNLOCK_STRTAB_MUTEX			\
    STMT_START {				\
	MUTEX_UNLOCK(&PL_strtab_mutex);		\
    } STMT_END

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


/* 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(PerlIO_stderr(),	\
			      "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

#else
/* USE_THREADS is not defined */
#define MUTEX_LOCK(m)
#define MUTEX_LOCK_NOCONTEXT(m)
#define MUTEX_UNLOCK(m)
#define MUTEX_UNLOCK_NOCONTEXT(m)
#define MUTEX_INIT(m)
#define MUTEX_DESTROY(m)
#define COND_INIT(c)
#define COND_SIGNAL(c)
#define COND_BROADCAST(c)
#define COND_WAIT(c, m)
#define COND_DESTROY(c)
#define LOCK_SV_MUTEX
#define UNLOCK_SV_MUTEX
#define LOCK_STRTAB_MUTEX
#define UNLOCK_STRTAB_MUTEX

#define THR
#define dTHR dNOOP
#endif /* USE_THREADS */
Commit	Line	Data
ea0efc06	1	#ifdef USE_THREADS
12ca11f6	2
ea0efc06	3	#ifdef WIN32
d55594ae	4	# include <win32thread.h>
d55594ae	5	#else
0d85d877	6	# ifdef OLD_PTHREADS_API /* Here be dragons. */
1cfa4ec7	7	# define DETACH(t) \
ea0efc06	8	STMT_START { \
46930d8f	9	if (pthread_detach(&(t)->self)) { \
ea0efc06	10	MUTEX_UNLOCK(&(t)->mutex); \
cea2e8a9	11	Perl_croak(aTHX_ "panic: DETACH"); \
ea0efc06	12	} \
ea0efc06	13	} STMT_END
9bbd4fab	14	# define THR getTHR()
20ce7b12	15	struct perl_thread *getTHR (void);
0d85d877	16	# define PTHREAD_GETSPECIFIC_INT
	17	# ifdef DJGPP
	18	# define pthread_addr_t any_t
	19	# define NEED_PTHREAD_INIT
6dc3770d	20	# define PTHREAD_CREATE_JOINABLE (1)
0d85d877	21	# endif
	22	# ifdef __OPEN_VM
	23	# define pthread_addr_t void *
	24	# endif
	25	# ifdef VMS
	26	# define pthread_attr_init(a) pthread_attr_create(a)
	27	# define PTHREAD_ATTR_SETDETACHSTATE(a,s) pthread_setdetach_np(a,s)
6dc3770d	28	# define PTHREAD_CREATE(t,a,s,d) pthread_create(t,a,s,d)
0d85d877	29	# define pthread_key_create(k,d) pthread_keycreate(k,(pthread_destructor_t)(d))
0d85d877	30	# define pthread_mutexattr_init(a) pthread_mutexattr_create(a)
9bbd4fab	31	# define pthread_mutexattr_settype(a,t) pthread_mutexattr_setkind_np(a,t)
0d85d877	32	# endif
	33	# if defined(DJGPP) \|\| defined(__OPEN_VM)
	34	# define PTHREAD_ATTR_SETDETACHSTATE(a,s) pthread_attr_setdetachstate(a,&(s))
	35	# define YIELD pthread_yield(NULL)
	36	# endif
0d85d877	37	# endif
0d85d877	38	# ifndef VMS
1cfa4ec7	39	# define pthread_mutexattr_default NULL
0d85d877	40	# define pthread_condattr_default NULL
	41	# endif
	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	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	61	#ifdef I_MACH_CTHREADS
	62
	63	/* cthreads interface */
	64
	65	/* #include <mach/cthreads.h> is in perl.h #ifdef I_MACH_CTHREADS */
	66
	67	#define MUTEX_INIT(m) \
	68	STMT_START { \
	69	*m = mutex_alloc(); \
	70	if (*m) { \
	71	mutex_init(*m); \
	72	} else { \
cea2e8a9	73	Perl_croak(aTHX_ "panic: MUTEX_INIT"); \
7f3d1cf1	74	} \
	75	} STMT_END
	76
	77	#define MUTEX_LOCK(m) mutex_lock(*m)
	78	#define MUTEX_UNLOCK(m) mutex_unlock(*m)
	79	#define MUTEX_DESTROY(m) \
	80	STMT_START { \
	81	mutex_free(*m); \
	82	*m = 0; \
	83	} STMT_END
	84
	85	#define COND_INIT(c) \
	86	STMT_START { \
	87	*c = condition_alloc(); \
	88	if (*c) { \
	89	condition_init(*c); \
	90	} else { \
cea2e8a9	91	Perl_croak(aTHX_ "panic: COND_INIT"); \
7f3d1cf1	92	} \
	93	} STMT_END
	94
	95	#define COND_SIGNAL(c) condition_signal(*c)
	96	#define COND_BROADCAST(c) condition_broadcast(*c)
	97	#define COND_WAIT(c, m) condition_wait(c, m)
	98	#define COND_DESTROY(c) \
	99	STMT_START { \
	100	condition_free(*c); \
	101	*c = 0; \
	102	} STMT_END
	103
	104	#define THREAD_CREATE(thr, f) (thr->self = cthread_fork(f, thr), 0)
	105	#define THREAD_POST_CREATE(thr)
	106
	107	#define THREAD_RET_TYPE any_t
	108	#define THREAD_RET_CAST(x) ((any_t) x)
	109
	110	#define DETACH(t) cthread_detach(t->self)
	111	#define JOIN(t, avp) ((avp) = (AV )cthread_join(t->self))
	112
	113	#define SET_THR(thr) cthread_set_data(cthread_self(), thr)
	114	#define THR cthread_data(cthread_self())
	115
	116	#define INIT_THREADS cthread_init()
	117	#define YIELD cthread_yield()
	118	#define ALLOC_THREAD_KEY
	119	#define SET_THREAD_SELF(thr) (thr->self = cthread_self())
	120
	121	#endif /* I_MACH_CTHREADS */
	122
1cfa4ec7	123	#ifndef YIELD
e7a4f449	124	# ifdef SCHED_YIELD
	125	# define YIELD SCHED_YIELD
	126	# else
	127	# ifdef HAS_SCHED_YIELD
	128	# define YIELD sched_yield()
	129	# else
	130	# ifdef HAS_PTHREAD_YIELD
	131	/* pthread_yield(NULL) platforms are expected
	132	* to have #defined YIELD for themselves. */
	133	# define YIELD pthread_yield()
	134	# endif
	135	# endif
	136	# endif
9731c6ca	137	#endif
11343788	138
227c31c3	139	#ifdef __hpux
	140	# define MUTEX_INIT_NEEDS_MUTEX_ZEROED
	141	#endif
	142
ea0efc06	143	#ifndef MUTEX_INIT
227c31c3	144	#ifdef MUTEX_INIT_NEEDS_MUTEX_ZEROED
	145	/* Temporary workaround, true bug is deeper. --jhi 1999-02-25 */
	146	#define MUTEX_INIT(m) \
	147	STMT_START { \
	148	Zero((m), 1, perl_mutex); \
	149	if (pthread_mutex_init((m), pthread_mutexattr_default)) \
cea2e8a9	150	Perl_croak(aTHX_ "panic: MUTEX_INIT"); \
227c31c3	151	} STMT_END
227c31c3	152	#else
ea0efc06	153	#define MUTEX_INIT(m) \
	154	STMT_START { \
	155	if (pthread_mutex_init((m), pthread_mutexattr_default)) \
cea2e8a9	156	Perl_croak(aTHX_ "panic: MUTEX_INIT"); \
ea0efc06	157	} STMT_END
227c31c3	158	#endif
ea0efc06	159	#define MUTEX_LOCK(m) \
	160	STMT_START { \
	161	if (pthread_mutex_lock((m))) \
cea2e8a9	162	Perl_croak(aTHX_ "panic: MUTEX_LOCK"); \
ea0efc06	163	} STMT_END
	164	#define MUTEX_UNLOCK(m) \
	165	STMT_START { \
	166	if (pthread_mutex_unlock((m))) \
cea2e8a9	167	Perl_croak(aTHX_ "panic: MUTEX_UNLOCK"); \
	168	} STMT_END
	169	#define MUTEX_LOCK_NOCONTEXT(m) \
	170	STMT_START { \
	171	if (pthread_mutex_lock((m))) \
	172	Perl_croak_nocontext("panic: MUTEX_LOCK"); \
	173	} STMT_END
	174	#define MUTEX_UNLOCK_NOCONTEXT(m) \
	175	STMT_START { \
	176	if (pthread_mutex_unlock((m))) \
	177	Perl_croak_nocontext("panic: MUTEX_UNLOCK");\
ea0efc06	178	} STMT_END
	179	#define MUTEX_DESTROY(m) \
	180	STMT_START { \
	181	if (pthread_mutex_destroy((m))) \
cea2e8a9	182	Perl_croak(aTHX_ "panic: MUTEX_DESTROY"); \
ea0efc06	183	} STMT_END
	184	#endif /* MUTEX_INIT */
	185
	186	#ifndef COND_INIT
	187	#define COND_INIT(c) \
	188	STMT_START { \
	189	if (pthread_cond_init((c), pthread_condattr_default)) \
cea2e8a9	190	Perl_croak(aTHX_ "panic: COND_INIT"); \
ea0efc06	191	} STMT_END
	192	#define COND_SIGNAL(c) \
	193	STMT_START { \
	194	if (pthread_cond_signal((c))) \
cea2e8a9	195	Perl_croak(aTHX_ "panic: COND_SIGNAL"); \
ea0efc06	196	} STMT_END
	197	#define COND_BROADCAST(c) \
	198	STMT_START { \
	199	if (pthread_cond_broadcast((c))) \
cea2e8a9	200	Perl_croak(aTHX_ "panic: COND_BROADCAST"); \
ea0efc06	201	} STMT_END
	202	#define COND_WAIT(c, m) \
	203	STMT_START { \
	204	if (pthread_cond_wait((c), (m))) \
cea2e8a9	205	Perl_croak(aTHX_ "panic: COND_WAIT"); \
ea0efc06	206	} STMT_END
	207	#define COND_DESTROY(c) \
	208	STMT_START { \
	209	if (pthread_cond_destroy((c))) \
cea2e8a9	210	Perl_croak(aTHX_ "panic: COND_DESTROY"); \
ea0efc06	211	} STMT_END
ea0efc06	212	#endif /* COND_INIT */
33f46ff6	213
f826a10b	214	/* DETACH(t) must only be called while holding t->mutex */
ea0efc06	215	#ifndef DETACH
	216	#define DETACH(t) \
	217	STMT_START { \
46930d8f	218	if (pthread_detach((t)->self)) { \
ea0efc06	219	MUTEX_UNLOCK(&(t)->mutex); \
cea2e8a9	220	Perl_croak(aTHX_ "panic: DETACH"); \
ea0efc06	221	} \
	222	} STMT_END
	223	#endif /* DETACH */
33f46ff6	224
ea0efc06	225	#ifndef JOIN
	226	#define JOIN(t, avp) \
	227	STMT_START { \
46930d8f	228	if (pthread_join((t)->self, (void**)(avp))) \
cea2e8a9	229	Perl_croak(aTHX_ "panic: pthread_join"); \
ea0efc06	230	} STMT_END
	231	#endif /* JOIN */
	232
	233	#ifndef SET_THR
	234	#define SET_THR(t) \
	235	STMT_START { \
533c011a	236	if (pthread_setspecific(PL_thr_key, (void *) (t))) \
cea2e8a9	237	Perl_croak(aTHX_ "panic: pthread_setspecific"); \
ea0efc06	238	} STMT_END
	239	#endif /* SET_THR */
	240
	241	#ifndef THR
0d85d877	242	#define THR ((struct perl_thread *) pthread_getspecific(PL_thr_key))
0d85d877	243	#endif
ea0efc06	244
940cb80d	245	/*
	246	* dTHR is performance-critical. Here, we only do the pthread_get_specific
	247	* if there may be more than one thread in existence, otherwise we get thr
	248	* from thrsv which is cached in the per-interpreter structure.
	249	* Systems with very fast pthread_get_specific (which should be all systems
	250	* but unfortunately isn't) may wish to simplify to "...*thr = THR".
b099ddc0	251	*
b099ddc0	252	* The use of PL_threadnum should be safe here.
940cb80d	253	*/
ea0efc06	254	#ifndef dTHR
940cb80d	255	# define dTHR \
533c011a	256	struct perl_thread thr = PL_threadnum? THR : (struct perl_thread)SvPVX(PL_thrsv)
ea0efc06	257	#endif /* dTHR */
11343788	258
33f46ff6	259	#ifndef INIT_THREADS
	260	# ifdef NEED_PTHREAD_INIT
	261	# define INIT_THREADS pthread_init()
	262	# else
	263	# define INIT_THREADS NOOP
	264	# endif
	265	#endif
11343788	266
940cb80d	267	/* Accessor for per-thread SVs */
	268	#define THREADSV(i) (thr->threadsvp[i])
	269
	270	/*
	271	* LOCK_SV_MUTEX and UNLOCK_SV_MUTEX are performance-critical. Here, we
	272	* try only locking them if there may be more than one thread in existence.
	273	* Systems with very fast mutexes (and/or slow conditionals) may wish to
	274	* remove the "if (threadnum) ..." test.
b099ddc0	275	* XXX do NOT use C<if (PL_threadnum) ...> -- it sets up race conditions!
940cb80d	276	*/
5f08fbcd	277	#define LOCK_SV_MUTEX \
5f08fbcd	278	STMT_START { \
b099ddc0	279	MUTEX_LOCK(&PL_sv_mutex); \
5f08fbcd	280	} STMT_END
	281
	282	#define UNLOCK_SV_MUTEX \
	283	STMT_START { \
b099ddc0	284	MUTEX_UNLOCK(&PL_sv_mutex); \
940cb80d	285	} STMT_END
940cb80d	286
5f08fbcd	287	/* Likewise for strtab_mutex */
	288	#define LOCK_STRTAB_MUTEX \
	289	STMT_START { \
b099ddc0	290	MUTEX_LOCK(&PL_strtab_mutex); \
5f08fbcd	291	} STMT_END
	292
	293	#define UNLOCK_STRTAB_MUTEX \
	294	STMT_START { \
b099ddc0	295	MUTEX_UNLOCK(&PL_strtab_mutex); \
940cb80d	296	} STMT_END
d55594ae	297
ea0efc06	298	#ifndef THREAD_RET_TYPE
	299	# define THREAD_RET_TYPE void *
	300	# define THREAD_RET_CAST(p) ((void *)(p))
	301	#endif /* THREAD_RET */
	302
11343788	303
33f46ff6	304	/* Values and macros for thr->flags */
605e5515	305	#define THRf_STATE_MASK 7
	306	#define THRf_R_JOINABLE 0
	307	#define THRf_R_JOINED 1
	308	#define THRf_R_DETACHED 2
	309	#define THRf_ZOMBIE 3
	310	#define THRf_DEAD 4
f93b4edd	311
458fb581	312	#define THRf_DID_DIE 8
07b73707	313
f826a10b	314	/* ThrSTATE(t) and ThrSETSTATE(t) must only be called while holding t->mutex */
458fb581	315	#define ThrSTATE(t) ((t)->flags & THRf_STATE_MASK)
f93b4edd	316	#define ThrSETSTATE(t, s) STMT_START { \
605e5515	317	(t)->flags &= ~THRf_STATE_MASK; \
33f46ff6	318	(t)->flags \|= (s); \
8b73bbec	319	DEBUG_S(PerlIO_printf(PerlIO_stderr(), \
605e5515	320	"thread %p set to state %d\n", (t), (s))); \
f93b4edd	321	} STMT_END
	322
	323	typedef struct condpair {
f826a10b	324	perl_mutex mutex; /* Protects all other fields */
	325	perl_cond owner_cond; /* For when owner changes at all */
	326	perl_cond cond; /* For cond_signal and cond_broadcast */
	327	Thread owner; /* Currently owning thread */
f93b4edd	328	} condpair_t;
	329
	330	#define MgMUTEXP(mg) (&((condpair_t *)(mg->mg_ptr))->mutex)
	331	#define MgOWNERCONDP(mg) (&((condpair_t *)(mg->mg_ptr))->owner_cond)
	332	#define MgCONDP(mg) (&((condpair_t *)(mg->mg_ptr))->cond)
	333	#define MgOWNER(mg) ((condpair_t *)(mg->mg_ptr))->owner
	334
ea0efc06	335	#else
	336	/* USE_THREADS is not defined */
	337	#define MUTEX_LOCK(m)
cea2e8a9	338	#define MUTEX_LOCK_NOCONTEXT(m)
ea0efc06	339	#define MUTEX_UNLOCK(m)
cea2e8a9	340	#define MUTEX_UNLOCK_NOCONTEXT(m)
ea0efc06	341	#define MUTEX_INIT(m)
	342	#define MUTEX_DESTROY(m)
	343	#define COND_INIT(c)
	344	#define COND_SIGNAL(c)
	345	#define COND_BROADCAST(c)
	346	#define COND_WAIT(c, m)
	347	#define COND_DESTROY(c)
93bce2dc	348	#define LOCK_SV_MUTEX
93bce2dc	349	#define UNLOCK_SV_MUTEX
5f08fbcd	350	#define LOCK_STRTAB_MUTEX
5f08fbcd	351	#define UNLOCK_STRTAB_MUTEX
ea0efc06	352
ea0efc06	353	#define THR
cea2e8a9	354	#define dTHR dNOOP
11343788	355	#endif /* USE_THREADS */