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freebsd/contrib/perl5/thread.h

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#ifdef USE_THREADS
#ifdef WIN32
# include <win32thread.h>
#else
#ifndef DJGPP
/* POSIXish threads */
#ifdef OLD_PTHREADS_API
# define pthread_mutexattr_init(a) pthread_mutexattr_create(a)
# define pthread_mutexattr_settype(a,t) pthread_mutexattr_setkind_np(a,t)
# define pthread_key_create(k,d) pthread_keycreate(k,(pthread_destructor_t)(d))
# define YIELD pthread_yield()
# define DETACH(t) \
STMT_START { \
if (pthread_detach(&(t)->self)) { \
MUTEX_UNLOCK(&(t)->mutex); \
croak("panic: DETACH"); \
} \
} STMT_END
#else
# define pthread_mutexattr_default NULL
# define pthread_condattr_default NULL
#endif /* OLD_PTHREADS_API */
#endif
#endif
#ifdef PTHREADS_CREATED_JOINABLE
# define ATTR_JOINABLE PTHREAD_CREATE_JOINABLE
#else
# ifdef PTHREAD_CREATE_UNDETACHED
# define ATTR_JOINABLE PTHREAD_CREATE_UNDETACHED
# else
# define ATTR_JOINABLE PTHREAD_CREATE_JOINABLE
# 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 { \
croak("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 { \
croak("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 HAS_SCHED_YIELD
# define YIELD sched_yield()
# else
# ifdef HAS_PTHREAD_YIELD
# define YIELD pthread_yield()
# 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)) \
croak("panic: MUTEX_INIT"); \
} STMT_END
#else
#define MUTEX_INIT(m) \
STMT_START { \
if (pthread_mutex_init((m), pthread_mutexattr_default)) \
croak("panic: MUTEX_INIT"); \
} STMT_END
#endif
#define MUTEX_LOCK(m) \
STMT_START { \
if (pthread_mutex_lock((m))) \
croak("panic: MUTEX_LOCK"); \
} STMT_END
#define MUTEX_UNLOCK(m) \
STMT_START { \
if (pthread_mutex_unlock((m))) \
croak("panic: MUTEX_UNLOCK"); \
} STMT_END
#define MUTEX_DESTROY(m) \
STMT_START { \
if (pthread_mutex_destroy((m))) \
croak("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)) \
croak("panic: COND_INIT"); \
} STMT_END
#define COND_SIGNAL(c) \
STMT_START { \
if (pthread_cond_signal((c))) \
croak("panic: COND_SIGNAL"); \
} STMT_END
#define COND_BROADCAST(c) \
STMT_START { \
if (pthread_cond_broadcast((c))) \
croak("panic: COND_BROADCAST"); \
} STMT_END
#define COND_WAIT(c, m) \
STMT_START { \
if (pthread_cond_wait((c), (m))) \
croak("panic: COND_WAIT"); \
} STMT_END
#define COND_DESTROY(c) \
STMT_START { \
if (pthread_cond_destroy((c))) \
croak("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); \
croak("panic: DETACH"); \
} \
} STMT_END
#endif /* DETACH */
#ifndef JOIN
#define JOIN(t, avp) \
STMT_START { \
if (pthread_join((t)->self, (void**)(avp))) \
croak("panic: pthread_join"); \
} STMT_END
#endif /* JOIN */
#ifndef SET_THR
#define SET_THR(t) \
STMT_START { \
if (pthread_setspecific(PL_thr_key, (void *) (t))) \
croak("panic: pthread_setspecific"); \
} STMT_END
#endif /* SET_THR */
#ifndef THR
# ifdef OLD_PTHREADS_API
struct perl_thread *getTHR _((void));
# define THR getTHR()
# else
# define THR ((struct perl_thread *) pthread_getspecific(PL_thr_key))
# endif /* OLD_PTHREADS_API */
#endif /* THR */
/*
* 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_UNLOCK(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
/* Rats: if dTHR is just blank then the subsequent ";" throws an error */
#ifdef WIN32
#define dTHR extern int Perl___notused
#else
#define dTHR extern int errno
#endif
#endif /* USE_THREADS */
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