235 lines
6.1 KiB
C
235 lines
6.1 KiB
C
#ifdef USE_THREADS
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#ifdef WIN32
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# include <win32thread.h>
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#else
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#ifndef DJGPP
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/* POSIXish threads */
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#ifdef OLD_PTHREADS_API
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# define pthread_mutexattr_init(a) pthread_mutexattr_create(a)
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# define pthread_mutexattr_settype(a,t) pthread_mutexattr_setkind_np(a,t)
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# define pthread_key_create(k,d) pthread_keycreate(k,(pthread_destructor_t)(d))
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# define YIELD pthread_yield()
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# define DETACH(t) \
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STMT_START { \
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if (pthread_detach(&(t)->self)) { \
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MUTEX_UNLOCK(&(t)->mutex); \
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croak("panic: DETACH"); \
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} \
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} STMT_END
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#else
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# define pthread_mutexattr_default NULL
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# define pthread_condattr_default NULL
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#endif /* OLD_PTHREADS_API */
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#endif
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#endif
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#ifdef PTHREADS_CREATED_JOINABLE
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# define ATTR_JOINABLE PTHREAD_CREATE_JOINABLE
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#else
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# ifdef PTHREAD_CREATE_UNDETACHED
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# define ATTR_JOINABLE PTHREAD_CREATE_UNDETACHED
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# else
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# define ATTR_JOINABLE PTHREAD_CREATE_JOINABLE
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# endif
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#endif
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#ifndef YIELD
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# ifdef HAS_SCHED_YIELD
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# define YIELD sched_yield()
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# else
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# ifdef HAS_PTHREAD_YIELD
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# define YIELD pthread_yield()
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# endif
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# endif
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#endif
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#ifndef MUTEX_INIT
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#define MUTEX_INIT(m) \
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STMT_START { \
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if (pthread_mutex_init((m), pthread_mutexattr_default)) \
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croak("panic: MUTEX_INIT"); \
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} STMT_END
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#define MUTEX_LOCK(m) \
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STMT_START { \
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if (pthread_mutex_lock((m))) \
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croak("panic: MUTEX_LOCK"); \
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} STMT_END
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#define MUTEX_UNLOCK(m) \
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STMT_START { \
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if (pthread_mutex_unlock((m))) \
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croak("panic: MUTEX_UNLOCK"); \
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} STMT_END
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#define MUTEX_DESTROY(m) \
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STMT_START { \
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if (pthread_mutex_destroy((m))) \
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croak("panic: MUTEX_DESTROY"); \
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} STMT_END
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#endif /* MUTEX_INIT */
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#ifndef COND_INIT
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#define COND_INIT(c) \
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STMT_START { \
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if (pthread_cond_init((c), pthread_condattr_default)) \
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croak("panic: COND_INIT"); \
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} STMT_END
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#define COND_SIGNAL(c) \
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STMT_START { \
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if (pthread_cond_signal((c))) \
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croak("panic: COND_SIGNAL"); \
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} STMT_END
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#define COND_BROADCAST(c) \
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STMT_START { \
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if (pthread_cond_broadcast((c))) \
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croak("panic: COND_BROADCAST"); \
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} STMT_END
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#define COND_WAIT(c, m) \
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STMT_START { \
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if (pthread_cond_wait((c), (m))) \
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croak("panic: COND_WAIT"); \
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} STMT_END
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#define COND_DESTROY(c) \
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STMT_START { \
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if (pthread_cond_destroy((c))) \
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croak("panic: COND_DESTROY"); \
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} STMT_END
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#endif /* COND_INIT */
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/* DETACH(t) must only be called while holding t->mutex */
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#ifndef DETACH
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#define DETACH(t) \
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STMT_START { \
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if (pthread_detach((t)->self)) { \
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MUTEX_UNLOCK(&(t)->mutex); \
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croak("panic: DETACH"); \
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} \
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} STMT_END
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#endif /* DETACH */
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#ifndef JOIN
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#define JOIN(t, avp) \
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STMT_START { \
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if (pthread_join((t)->self, (void**)(avp))) \
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croak("panic: pthread_join"); \
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} STMT_END
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#endif /* JOIN */
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#ifndef SET_THR
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#define SET_THR(t) \
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STMT_START { \
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if (pthread_setspecific(PL_thr_key, (void *) (t))) \
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croak("panic: pthread_setspecific"); \
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} STMT_END
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#endif /* SET_THR */
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#ifndef THR
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# ifdef OLD_PTHREADS_API
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struct perl_thread *getTHR _((void));
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# define THR getTHR()
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# else
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# define THR ((struct perl_thread *) pthread_getspecific(PL_thr_key))
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# endif /* OLD_PTHREADS_API */
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#endif /* THR */
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/*
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* dTHR is performance-critical. Here, we only do the pthread_get_specific
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* if there may be more than one thread in existence, otherwise we get thr
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* from thrsv which is cached in the per-interpreter structure.
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* Systems with very fast pthread_get_specific (which should be all systems
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* but unfortunately isn't) may wish to simplify to "...*thr = THR".
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*/
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#ifndef dTHR
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# define dTHR \
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struct perl_thread *thr = PL_threadnum? THR : (struct perl_thread*)SvPVX(PL_thrsv)
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#endif /* dTHR */
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#ifndef INIT_THREADS
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# ifdef NEED_PTHREAD_INIT
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# define INIT_THREADS pthread_init()
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# else
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# define INIT_THREADS NOOP
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# endif
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#endif
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/* Accessor for per-thread SVs */
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#define THREADSV(i) (thr->threadsvp[i])
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/*
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* LOCK_SV_MUTEX and UNLOCK_SV_MUTEX are performance-critical. Here, we
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* try only locking them if there may be more than one thread in existence.
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* Systems with very fast mutexes (and/or slow conditionals) may wish to
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* remove the "if (threadnum) ..." test.
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*/
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#define LOCK_SV_MUTEX \
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STMT_START { \
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if (PL_threadnum) \
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MUTEX_LOCK(&PL_sv_mutex); \
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} STMT_END
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#define UNLOCK_SV_MUTEX \
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STMT_START { \
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if (PL_threadnum) \
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MUTEX_UNLOCK(&PL_sv_mutex); \
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} STMT_END
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#ifndef THREAD_RET_TYPE
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# define THREAD_RET_TYPE void *
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# define THREAD_RET_CAST(p) ((void *)(p))
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#endif /* THREAD_RET */
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/* Values and macros for thr->flags */
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#define THRf_STATE_MASK 7
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#define THRf_R_JOINABLE 0
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#define THRf_R_JOINED 1
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#define THRf_R_DETACHED 2
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#define THRf_ZOMBIE 3
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#define THRf_DEAD 4
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#define THRf_DID_DIE 8
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/* ThrSTATE(t) and ThrSETSTATE(t) must only be called while holding t->mutex */
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#define ThrSTATE(t) ((t)->flags & THRf_STATE_MASK)
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#define ThrSETSTATE(t, s) STMT_START { \
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(t)->flags &= ~THRf_STATE_MASK; \
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(t)->flags |= (s); \
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DEBUG_S(PerlIO_printf(PerlIO_stderr(), \
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"thread %p set to state %d\n", (t), (s))); \
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} STMT_END
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typedef struct condpair {
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perl_mutex mutex; /* Protects all other fields */
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perl_cond owner_cond; /* For when owner changes at all */
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perl_cond cond; /* For cond_signal and cond_broadcast */
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Thread owner; /* Currently owning thread */
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} condpair_t;
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#define MgMUTEXP(mg) (&((condpair_t *)(mg->mg_ptr))->mutex)
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#define MgOWNERCONDP(mg) (&((condpair_t *)(mg->mg_ptr))->owner_cond)
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#define MgCONDP(mg) (&((condpair_t *)(mg->mg_ptr))->cond)
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#define MgOWNER(mg) ((condpair_t *)(mg->mg_ptr))->owner
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#else
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/* USE_THREADS is not defined */
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#define MUTEX_LOCK(m)
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#define MUTEX_UNLOCK(m)
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#define MUTEX_INIT(m)
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#define MUTEX_DESTROY(m)
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#define COND_INIT(c)
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#define COND_SIGNAL(c)
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#define COND_BROADCAST(c)
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#define COND_WAIT(c, m)
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#define COND_DESTROY(c)
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#define LOCK_SV_MUTEX
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#define UNLOCK_SV_MUTEX
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#define THR
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/* Rats: if dTHR is just blank then the subsequent ";" throws an error */
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#ifdef WIN32
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#define dTHR extern int Perl___notused
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#else
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#define dTHR extern int errno
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#endif
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#endif /* USE_THREADS */
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