X-Git-Url: https://perl5.git.perl.org/perl5.git/blobdiff_plain/4755096ec61711c5104ba0b6b9314f32ca0351fe..ccac19ea313fd7152f9ddb5b7dd90f6ebe7ef7b9:/thread.h diff --git a/thread.h b/thread.h index 8234360..476f310 100644 --- a/thread.h +++ b/thread.h @@ -1,14 +1,33 @@ -#if defined(USE_THREADS) || defined(USE_ITHREADS) +/* 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 NETWARE +# include +#else # ifdef OLD_PTHREADS_API /* Here be dragons. */ # define DETACH(t) \ STMT_START { \ - if (pthread_detach(&(t)->self)) { \ + int _eC_; \ + if ((_eC_ = pthread_detach(&(t)->self))) { \ MUTEX_UNLOCK(&(t)->mutex); \ - Perl_croak_nocontext("panic: DETACH"); \ + Perl_croak_nocontext("panic: DETACH (%d) [%s:%d]", \ + _eC_, __FILE__, __LINE__); \ } \ } STMT_END @@ -24,6 +43,11 @@ # ifdef __OPEN_VM # define pthread_addr_t void * # endif +# 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) @@ -32,13 +56,25 @@ # 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) +# 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(DJGPP) || defined(__OPEN_VM) || 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 /* NETWARE */ #endif #ifndef PTHREAD_CREATE @@ -58,6 +94,10 @@ # endif #endif +#ifdef DGUX +# define THREAD_CREATE_NEEDS_STACK (32*1024) +#endif + #ifdef I_MACH_CTHREADS /* cthreads interface */ @@ -70,7 +110,8 @@ if (*m) { \ mutex_init(*m); \ } else { \ - Perl_croak_nocontext("panic: MUTEX_INIT"); \ + Perl_croak_nocontext("panic: MUTEX_INIT [%s:%d]", \ + __FILE__, __LINE__); \ } \ } STMT_END @@ -89,7 +130,8 @@ condition_init(*c); \ } \ else { \ - Perl_croak_nocontext("panic: COND_INIT"); \ + Perl_croak_nocontext("panic: COND_INIT [%s:%d]", \ + __FILE__, __LINE__); \ } \ } STMT_END @@ -117,6 +159,7 @@ #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 */ @@ -147,66 +190,86 @@ /* Temporary workaround, true bug is deeper. --jhi 1999-02-25 */ # define MUTEX_INIT(m) \ STMT_START { \ + int _eC_; \ Zero((m), 1, perl_mutex); \ - if (pthread_mutex_init((m), pthread_mutexattr_default)) \ - Perl_croak_nocontext("panic: MUTEX_INIT"); \ + 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 { \ - if (pthread_mutex_init((m), pthread_mutexattr_default)) \ - Perl_croak_nocontext("panic: MUTEX_INIT"); \ + 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 # define MUTEX_LOCK(m) \ STMT_START { \ - if (pthread_mutex_lock((m))) \ - Perl_croak_nocontext("panic: MUTEX_LOCK"); \ + int _eC_; \ + if ((_eC_ = pthread_mutex_lock((m)))) \ + Perl_croak_nocontext("panic: MUTEX_LOCK (%d) [%s:%d]", \ + _eC_, __FILE__, __LINE__); \ } STMT_END # define MUTEX_UNLOCK(m) \ STMT_START { \ - if (pthread_mutex_unlock((m))) \ - Perl_croak_nocontext("panic: MUTEX_UNLOCK"); \ + int _eC_; \ + if ((_eC_ = pthread_mutex_unlock((m)))) \ + Perl_croak_nocontext("panic: MUTEX_UNLOCK (%d) [%s:%d]", \ + _eC_, __FILE__, __LINE__); \ } STMT_END # define MUTEX_DESTROY(m) \ STMT_START { \ - if (pthread_mutex_destroy((m))) \ - Perl_croak_nocontext("panic: MUTEX_DESTROY"); \ + 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 { \ - if (pthread_cond_init((c), pthread_condattr_default)) \ - Perl_croak_nocontext("panic: COND_INIT"); \ + 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 { \ - if (pthread_cond_signal((c))) \ - Perl_croak_nocontext("panic: COND_SIGNAL"); \ + 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 { \ - if (pthread_cond_broadcast((c))) \ - Perl_croak_nocontext("panic: COND_BROADCAST"); \ + 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 { \ - if (pthread_cond_wait((c), (m))) \ - Perl_croak_nocontext("panic: COND_WAIT"); \ + 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 { \ - if (pthread_cond_destroy((c))) \ - Perl_croak_nocontext("panic: COND_DESTROY"); \ + 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 */ @@ -214,9 +277,11 @@ #ifndef DETACH # define DETACH(t) \ STMT_START { \ - if (pthread_detach((t)->self)) { \ + int _eC_; \ + if ((_eC_ = pthread_detach((t)->self))) { \ MUTEX_UNLOCK(&(t)->mutex); \ - Perl_croak_nocontext("panic: DETACH"); \ + Perl_croak_nocontext("panic: DETACH (%d) [%s:%d]", \ + _eC_, __FILE__, __LINE__); \ } \ } STMT_END #endif /* DETACH */ @@ -224,20 +289,38 @@ #ifndef JOIN # define JOIN(t, avp) \ STMT_START { \ - if (pthread_join((t)->self, (void**)(avp))) \ - Perl_croak_nocontext("panic: pthread_join"); \ + 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 + #ifndef PERL_GET_CONTEXT -# define PERL_GET_CONTEXT pthread_getspecific(PL_thr_key) +# 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_nocontext("panic: pthread_setspecific"); \ + int _eC_; \ + if ((_eC_ = pthread_setspecific(PL_thr_key, (void *)(t)))) \ + Perl_croak_nocontext("panic: pthread_setspecific (%d) [%s:%d]", \ + _eC_, __FILE__, __LINE__); \ } STMT_END #endif /* PERL_SET_CONTEXT */ @@ -250,72 +333,40 @@ #ifndef ALLOC_THREAD_KEY # define ALLOC_THREAD_KEY \ STMT_START { \ - if (pthread_key_create(&PL_thr_key, 0)) { \ - fprintf(stderr, "panic: pthread_key_create"); \ + int _eC_; \ + if ((_eC_ = pthread_key_create(&PL_thr_key, 0))) { \ + 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 * # 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 -- 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) -# define LOCK_FDPID_MUTEX MUTEX_LOCK(&PL_fdpid_mutex) -# define UNLOCK_FDPID_MUTEX MUTEX_UNLOCK(&PL_fdpid_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 +# define LOCK_DOLLARZERO_MUTEX MUTEX_LOCK(&PL_dollarzero_mutex) +# define UNLOCK_DOLLARZERO_MUTEX MUTEX_UNLOCK(&PL_dollarzero_mutex) -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 */ +#endif /* USE_ITHREADS */ #ifndef MUTEX_LOCK # define MUTEX_LOCK(m) @@ -385,6 +436,22 @@ typedef struct condpair { # define UNLOCK_FDPID_MUTEX #endif +#ifndef LOCK_SV_LOCK_MUTEX +# define LOCK_SV_LOCK_MUTEX +#endif + +#ifndef UNLOCK_SV_LOCK_MUTEX +# define UNLOCK_SV_LOCK_MUTEX +#endif + +#ifndef LOCK_DOLLARZERO_MUTEX +# define LOCK_DOLLARZERO_MUTEX +#endif + +#ifndef UNLOCK_DOLLARZERO_MUTEX +# define UNLOCK_DOLLARZERO_MUTEX +#endif + /* THR, SET_THR, and dTHR are there for compatibility with old versions */ #ifndef THR # define THR PERL_GET_THX