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Þ'¯°ÌME[YéïĵÂCå½ Ué©Áû'Ê9%eÔðNU”ë‘ÌsD3/®+UI˜9h.WC”빓$#:pz:YÓ ¿xž* ³$Í +$kñAŠ‹†¢ Uê>¸)_š¬÷©ßAÂÔb9ÇU ¯¾á•9¯ÏÏ÷O÷¼¼Fähal1‰3Ì[Ïr•´UCksNÐ] R‘¸¥H+§Šé†c©vÖÞ0iÓ76s†î!§=ß ¼~Ô'°Ãmäoäš³ªøi1úÉ)³yV8 CLÄØÁ‘WYïi€H6ÖÑiámø^ÈY´°Ñ7¥Û*—Ñ©L«Qƒï—Ùrÿ ›£Ð*š¸ˆL©ˆ$ˆ ÷¾D§9È®«qbqC)–ˆïv´çñsÑVT­Ø, <àïºÀO«Jý·õ àfPìð .wFšir´þ’2_Y *Æ€x\« ì€9š@ Ž|F⇥ˆkZ@hÖÄ0t¿-<“‹qµ¾*ZL¤Ú)&BJpÓF5=$„at*Zš$’ÑtdûÝRI1 2Ž‰$€$I$#‰SÞ’Hë¬ï;Á$¡t$’`<(ñÇt)$‡Ð.Êf¢X’Kt=Éé$‚ˆªè¢oÝëòI%Rgcª÷ŠyI%¡‰ÿ !ñ)´õ $¤ Ô’IIGÿÙ/* thread.h * * Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, * by Larry Wall and others * * You may distribute under the terms of either the GNU General Public * License or the Artistic License, as specified in the README file. * */ #if defined(USE_ITHREADS) #if defined(VMS) #include #endif #ifdef WIN32 # include #else # ifdef OLD_PTHREADS_API /* Here be dragons. */ # define DETACH(t) \ STMT_START { \ int _eC_; \ if ((_eC_ = pthread_detach(&(t)->self))) { \ MUTEX_UNLOCK(&(t)->mutex); \ Perl_croak_nocontext("panic: DETACH (%d) [%s:%d]", \ _eC_, __FILE__, __LINE__); \ } \ } STMT_END # define PERL_GET_CONTEXT Perl_get_context() # define PERL_SET_CONTEXT(t) Perl_set_context((void*)t) # define PTHREAD_GETSPECIFIC_INT # ifdef OEMVS # define pthread_addr_t void * # define pthread_create(t,a,s,d) pthread_create(t,&(a),s,d) # define pthread_keycreate pthread_key_create # 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(__hpux) && defined(__ux_version) && __ux_version <= 1020 # define pthread_attr_init(a) pthread_attr_create(a) /* XXX pthread_setdetach_np() missing in DCE threads on HP-UX 10.20 */ # define PTHREAD_ATTR_SETDETACHSTATE(a,s) (0) # 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(OEMVS) # define PTHREAD_ATTR_SETDETACHSTATE(a,s) pthread_attr_setdetachstate(a,&(s)) # define YIELD pthread_yield(NULL) # endif # endif # if !defined(__hpux) || !defined(__ux_version) || __ux_version > 1020 # 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 __VMS /* Default is 1024 on VAX, 8192 otherwise */ # ifdef __ia64 # define THREAD_CREATE_NEEDS_STACK (48*1024) # else # define THREAD_CREATE_NEEDS_STACK (32*1024) # endif #endif #ifdef I_MACH_CTHREADS /* cthreads interface */ /* #include 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_nocontext("panic: MUTEX_INIT [%s:%d]", \ __FILE__, __LINE__); \ } \ } 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_nocontext("panic: COND_INIT [%s:%d]", \ __FILE__, __LINE__); \ } \ } 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_RET_TYPE any_t #define DETACH(t) cthread_detach(t->self) #define JOIN(t, avp) (*(avp) = MUTABLE_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 FREE_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 # elif defined(HAS_SCHED_YIELD) # define YIELD sched_yield() # elif defined(HAS_PTHREAD_YIELD) /* pthread_yield(NULL) platforms are expected * to have #defined YIELD for themselves. */ # define YIELD pthread_yield() # 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 { \ int _eC_; \ Zero((m), 1, perl_mutex); \ if ((_eC_ = pthread_mutex_init((m), pthread_mutexattr_default))) \ Perl_croak_nocontext("panic: MUTEX_INIT (%d) [%s:%d]", \ _eC_, __FILE__, __LINE__); \ } STMT_END # else # define MUTEX_INIT(m) \ STMT_START { \ int _eC_; \ if ((_eC_ = pthread_mutex_init((m), pthread_mutexattr_default))) \ Perl_croak_nocontext("panic: MUTEX_INIT (%d) [%s:%d]", \ _eC_, __FILE__, __LINE__); \ } STMT_END # endif # ifdef PERL_TSA_ACTIVE # define perl_pthread_mutex_lock(m) perl_tsa_mutex_lock(m) # define perl_pthread_mutex_unlock(m) perl_tsa_mutex_unlock(m) # else # define perl_pthread_mutex_lock(m) pthread_mutex_lock(m) # define perl_pthread_mutex_unlock(m) pthread_mutex_unlock(m) # endif # define MUTEX_LOCK(m) \ STMT_START { \ int _eC_; \ if ((_eC_ = perl_pthread_mutex_lock((m)))) \ Perl_croak_nocontext("panic: MUTEX_LOCK (%d) [%s:%d]", \ _eC_, __FILE__, __LINE__); \ } STMT_END # define MUTEX_UNLOCK(m) \ STMT_START { \ int _eC_; \ if ((_eC_ = perl_pthread_mutex_unlock((m)))) \ Perl_croak_nocontext("panic: MUTEX_UNLOCK (%d) [%s:%d]", \ _eC_, __FILE__, __LINE__); \ } STMT_END # define MUTEX_DESTROY(m) \ STMT_START { \ int _eC_; \ if ((_eC_ = pthread_mutex_destroy((m)))) \ Perl_croak_nocontext("panic: MUTEX_DESTROY (%d) [%s:%d]", \ _eC_, __FILE__, __LINE__); \ } STMT_END #endif /* MUTEX_INIT */ #ifndef COND_INIT # define COND_INIT(c) \ STMT_START { \ int _eC_; \ if ((_eC_ = pthread_cond_init((c), pthread_condattr_default))) \ Perl_croak_nocontext("panic: COND_INIT (%d) [%s:%d]", \ _eC_, __FILE__, __LINE__); \ } STMT_END # define COND_SIGNAL(c) \ STMT_START { \ int _eC_; \ if ((_eC_ = pthread_cond_signal((c)))) \ Perl_croak_nocontext("panic: COND_SIGNAL (%d) [%s:%d]", \ _eC_, __FILE__, __LINE__); \ } STMT_END # define COND_BROADCAST(c) \ STMT_START { \ int _eC_; \ if ((_eC_ = pthread_cond_broadcast((c)))) \ Perl_croak_nocontext("panic: COND_BROADCAST (%d) [%s:%d]", \ _eC_, __FILE__, __LINE__); \ } STMT_END # define COND_WAIT(c, m) \ STMT_START { \ int _eC_; \ if ((_eC_ = pthread_cond_wait((c), (m)))) \ Perl_croak_nocontext("panic: COND_WAIT (%d) [%s:%d]", \ _eC_, __FILE__, __LINE__); \ } STMT_END # define COND_DESTROY(c) \ STMT_START { \ int _eC_; \ if ((_eC_ = pthread_cond_destroy((c)))) \ Perl_croak_nocontext("panic: COND_DESTROY (%d) [%s:%d]", \ _eC_, __FILE__, __LINE__); \ } STMT_END #endif /* COND_INIT */ #if defined(MUTEX_LOCK) && defined(MUTEX_UNLOCK) \ && defined(COND_SIGNAL) && defined(COND_WAIT) /* These emulate native many-reader/1-writer locks. * Basically a locking reader just locks the semaphore long enough to increment * a counter; and similarly decrements it when when through. Any writer will * run only when the count of readers is 0. That is because it blocks on that * semaphore (doing a COND_WAIT) until it gets control of it, which won't * happen unless the count becomes 0. ALL readers and other writers are then * blocked until it releases the semaphore. The reader whose unlocking causes * the count to become 0 signals any waiting writers, and the system guarantees * that only one gets control at a time */ # define PERL_READ_LOCK(mutex) \ STMT_START { \ MUTEX_LOCK(&(mutex)->lock); \ (mutex)->readers_count++; \ MUTEX_UNLOCK(&(mutex)->lock); \ } STMT_END # define PERL_READ_UNLOCK(mutex) \ STMT_START { \ MUTEX_LOCK(&(mutex)->lock); \ (mutex)->readers_count--; \ if ((mutex)->readers_count <= 0) { \ assert((mutex)->readers_count == 0); \ COND_SIGNAL(&(mutex)->wakeup); \ (mutex)->readers_count = 0; \ } \ MUTEX_UNLOCK(&(mutex)->lock); \ } STMT_END # define PERL_WRITE_LOCK(mutex) \ STMT_START { \ MUTEX_LOCK(&(mutex)->lock); \ do { \ if ((mutex)->readers_count <= 0) { \ assert((mutex)->readers_count == 0); \ (mutex)->readers_count = 0; \ break; \ } \ COND_WAIT(&(mutex)->wakeup, &(mutex)->lock); \ } \ while (1); \ \ /* Here, the mutex is locked, with no readers */ \ } STMT_END # define PERL_WRITE_UNLOCK(mutex) \ STMT_START { \ COND_SIGNAL(&(mutex)->wakeup); \ MUTEX_UNLOCK(&(mutex)->lock); \ } STMT_END # define PERL_RW_MUTEX_INIT(mutex) \ STMT_START { \ MUTEX_INIT(&(mutex)->lock); \ COND_INIT(&(mutex)->wakeup); \ (mutex)->readers_count = 0; \ } STMT_END # define PERL_RW_MUTEX_DESTROY(mutex) \ STMT_START { \ COND_DESTROY(&(mutex)->wakeup); \ MUTEX_DESTROY(&(mutex)->lock); \ } STMT_END #endif /* DETACH(t) must only be called while holding t->mutex */ #ifndef DETACH # define DETACH(t) \ STMT_START { \ int _eC_; \ if ((_eC_ = pthread_detach((t)->self))) { \ MUTEX_UNLOCK(&(t)->mutex); \ Perl_croak_nocontext("panic: DETACH (%d) [%s:%d]", \ _eC_, __FILE__, __LINE__); \ } \ } STMT_END #endif /* DETACH */ #ifndef JOIN # define JOIN(t, avp) \ STMT_START { \ int _eC_; \ if ((_eC_ = pthread_join((t)->self, (void**)(avp)))) \ Perl_croak_nocontext("panic: pthread_join (%d) [%s:%d]", \ _eC_, __FILE__, __LINE__); \ } STMT_END #endif /* JOIN */ /* Use an unchecked fetch of thread-specific data instead of a checked one. * It would fail if the key were bogus, but if the key were bogus then * Really Bad Things would be happening anyway. --dan */ #if (defined(__ALPHA) && (__VMS_VER >= 70000000)) || \ (defined(__alpha) && defined(__osf__) && !defined(__GNUC__)) /* Available only on >= 4.0 */ # define HAS_PTHREAD_UNCHECKED_GETSPECIFIC_NP /* Configure test needed */ #endif #ifdef HAS_PTHREAD_UNCHECKED_GETSPECIFIC_NP # define PTHREAD_GETSPECIFIC(key) pthread_unchecked_getspecific_np(key) #else # define PTHREAD_GETSPECIFIC(key) pthread_getspecific(key) #endif #if defined(PERL_THREAD_LOCAL) && !defined(PERL_GET_CONTEXT) && !defined(PERL_SET_CONTEXT) && !defined(__cplusplus) /* Use C11 thread-local storage, where possible. * Frustratingly we can't use it for C++ extensions, C++ and C disagree on the * syntax used for thread local storage, meaning that the working token that * Configure probed for C turns out to be a compiler error on C++. Great. * (Well, unless one or both is supporting non-standard syntax as an extension) * As Configure doesn't have a way to probe for C++ dialects, we just take the * safe option and do the same as 5.34.0 and earlier - use pthreads on C++. * Of course, if C++ XS extensions really want to avoid *all* this overhead, * they should #define PERL_NO_GET_CONTEXT and pass aTHX/aTHX_ explicitly) */ # define PERL_USE_THREAD_LOCAL extern PERL_THREAD_LOCAL void *PL_current_context; # define PERL_GET_CONTEXT PL_current_context /* We must also call pthread_setspecific() always, as C++ code has to read it * with pthreads (the #else side just below) */ # define PERL_SET_CONTEXT(t) \ STMT_START { \ int _eC_; \ if ((_eC_ = pthread_setspecific(PL_thr_key, PL_current_context = (void *)(t)))) \ Perl_croak_nocontext("panic: pthread_setspecific (%d) [%s:%d]", \ _eC_, __FILE__, __LINE__); \ } STMT_END #else /* else fall back to pthreads */ # ifndef PERL_GET_CONTEXT # define PERL_GET_CONTEXT PTHREAD_GETSPECIFIC(PL_thr_key) # endif /* For C++ extensions built on a system where the C compiler provides thread * local storage that call PERL_SET_CONTEXT() also need to set * PL_current_context, so need to call into C code to do this. * To avoid exploding code complexity, do this also on C platforms that don't * support thread local storage. PERL_SET_CONTEXT is not called that often. */ # ifndef PERL_SET_CONTEXT # define PERL_SET_CONTEXT(t) Perl_set_context((void*)t) # endif /* PERL_SET_CONTEXT */ #endif /* PERL_THREAD_LOCAL */ #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)) { \ PERL_UNUSED_RESULT(write(2, STR_WITH_LEN("panic: pthread_key_create failed\n"))); \ exit(1); \ } \ } STMT_END #endif #ifndef FREE_THREAD_KEY # define FREE_THREAD_KEY \ STMT_START { \ pthread_key_delete(PL_thr_key); \ } STMT_END #endif #ifndef PTHREAD_ATFORK # ifdef HAS_PTHREAD_ATFORK # define PTHREAD_ATFORK(prepare,parent,child) \ pthread_atfork(prepare,parent,child) # else # define PTHREAD_ATFORK(prepare,parent,child) \ NOOP # endif #endif #ifndef THREAD_RET_TYPE # define THREAD_RET_TYPE void * #endif /* THREAD_RET */ # define LOCK_DOLLARZERO_MUTEX MUTEX_LOCK(&PL_dollarzero_mutex) # define UNLOCK_DOLLARZERO_MUTEX MUTEX_UNLOCK(&PL_dollarzero_mutex) #endif /* USE_ITHREADS */ #ifndef MUTEX_LOCK # define MUTEX_LOCK(m) NOOP #endif #ifndef MUTEX_UNLOCK # define MUTEX_UNLOCK(m) NOOP #endif #ifndef MUTEX_INIT # define MUTEX_INIT(m) NOOP #endif #ifndef MUTEX_DESTROY # define MUTEX_DESTROY(m) NOOP #endif #ifndef COND_INIT # define COND_INIT(c) NOOP #endif #ifndef COND_SIGNAL # define COND_SIGNAL(c) NOOP #endif #ifndef COND_BROADCAST # define COND_BROADCAST(c) NOOP #endif #ifndef COND_WAIT # define COND_WAIT(c, m) NOOP #endif #ifndef COND_DESTROY # define COND_DESTROY(c) NOOP #endif #ifndef PERL_READ_LOCK # define PERL_READ_LOCK NOOP # define PERL_READ_UNLOCK NOOP # define PERL_WRITE_LOCK NOOP # define PERL_WRITE_UNLOCK NOOP # define PERL_RW_MUTEX_INIT NOOP # define PERL_RW_MUTEX_DESTROY NOOP #endif #ifndef LOCK_DOLLARZERO_MUTEX # define LOCK_DOLLARZERO_MUTEX NOOP #endif #ifndef UNLOCK_DOLLARZERO_MUTEX # define UNLOCK_DOLLARZERO_MUTEX NOOP #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 /* * ex: set ts=8 sts=4 sw=4 et: */