X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=thread.h;h=e9933e225ef0531d5442e8b23986499a4b3c4940;hb=75550b4e442842ecb6730cd1ec1d17d1900bcbeb;hp=87828aba9e16db6d88b098b5d90d07ad46654f3f;hpb=1feb27209aee3921894ffc1cc08027670d4240f3;p=p5sagit%2Fp5-mst-13.2.git diff --git a/thread.h b/thread.h index 87828ab..e9933e2 100644 --- a/thread.h +++ b/thread.h @@ -1,18 +1,36 @@ -#if defined(USE_THREADS) || defined(USE_ITHREADS) +/* thread.h + * + * Copyright (c) 1997-2002, Larry Wall + * + * 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_5005THREADS) || 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)) { \ - MUTEX_UNLOCK(&(t)->mutex); \ - Perl_croak(aTHX_ "panic: DETACH"); \ - } \ +# define DETACH(t) \ + STMT_START { \ + if (pthread_detach(&(t)->self)) { \ + MUTEX_UNLOCK(&(t)->mutex); \ + Perl_croak_nocontext("panic: DETACH"); \ + } \ } STMT_END -# define THR getTHR() -struct perl_thread *getTHR (void); + +# define PERL_GET_CONTEXT Perl_get_context() +# define PERL_SET_CONTEXT(t) Perl_set_context((void*)t) + # define PTHREAD_GETSPECIFIC_INT # ifdef DJGPP # define pthread_addr_t any_t @@ -30,13 +48,25 @@ struct perl_thread *getTHR (void); # 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(DJGPP) || defined(__OPEN_VM) # 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 @@ -56,48 +86,53 @@ struct perl_thread *getTHR (void); # endif #endif +#ifdef DGUX +# define THREAD_CREATE_NEEDS_STACK (32*1024) +#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(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 MUTEX_INIT(m) \ + STMT_START { \ + *m = mutex_alloc(); \ + if (*m) { \ + mutex_init(*m); \ + } else { \ + Perl_croak_nocontext("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_nocontext("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 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) @@ -108,12 +143,13 @@ struct perl_thread *getTHR (void); #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 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 +#define ALLOC_THREAD_KEY NOOP +#define FREE_THREAD_KEY NOOP #define SET_THREAD_SELF(thr) (thr->self = cthread_self()) #endif /* I_MACH_CTHREADS */ @@ -139,102 +175,118 @@ struct perl_thread *getTHR (void); #endif #ifndef MUTEX_INIT -#ifdef MUTEX_INIT_NEEDS_MUTEX_ZEROED + +# ifdef MUTEX_INIT_NEEDS_MUTEX_ZEROED /* Temporary workaround, true bug is deeper. --jhi 1999-02-25 */ -#define MUTEX_INIT(m) \ +# 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"); \ + Perl_croak_nocontext("panic: MUTEX_INIT"); \ } STMT_END -#else -#define MUTEX_INIT(m) \ +# 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"); \ + Perl_croak_nocontext("panic: MUTEX_INIT"); \ } STMT_END -#define MUTEX_LOCK_NOCONTEXT(m) \ - STMT_START { \ - if (pthread_mutex_lock((m))) \ - Perl_croak_nocontext("panic: MUTEX_LOCK"); \ +# endif + +# define MUTEX_LOCK(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");\ + +# define MUTEX_UNLOCK(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"); \ + +# define MUTEX_DESTROY(m) \ + STMT_START { \ + if (pthread_mutex_destroy((m))) \ + Perl_croak_nocontext("panic: MUTEX_DESTROY"); \ } STMT_END #endif /* MUTEX_INIT */ #ifndef COND_INIT -#define COND_INIT(c) \ +# define COND_INIT(c) \ STMT_START { \ if (pthread_cond_init((c), pthread_condattr_default)) \ - Perl_croak(aTHX_ "panic: COND_INIT"); \ + Perl_croak_nocontext("panic: COND_INIT"); \ } STMT_END -#define COND_SIGNAL(c) \ - STMT_START { \ - if (pthread_cond_signal((c))) \ - Perl_croak(aTHX_ "panic: COND_SIGNAL"); \ + +# define COND_SIGNAL(c) \ + STMT_START { \ + if (pthread_cond_signal((c))) \ + Perl_croak_nocontext("panic: COND_SIGNAL"); \ } STMT_END -#define COND_BROADCAST(c) \ - STMT_START { \ - if (pthread_cond_broadcast((c))) \ - Perl_croak(aTHX_ "panic: COND_BROADCAST"); \ + +# define COND_BROADCAST(c) \ + STMT_START { \ + if (pthread_cond_broadcast((c))) \ + Perl_croak_nocontext("panic: COND_BROADCAST"); \ } STMT_END -#define COND_WAIT(c, m) \ - STMT_START { \ - if (pthread_cond_wait((c), (m))) \ - Perl_croak(aTHX_ "panic: COND_WAIT"); \ + +# define COND_WAIT(c, m) \ + STMT_START { \ + if (pthread_cond_wait((c), (m))) \ + Perl_croak_nocontext("panic: COND_WAIT"); \ } STMT_END -#define COND_DESTROY(c) \ - STMT_START { \ - if (pthread_cond_destroy((c))) \ - Perl_croak(aTHX_ "panic: COND_DESTROY"); \ + +# define COND_DESTROY(c) \ + STMT_START { \ + if (pthread_cond_destroy((c))) \ + Perl_croak_nocontext("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"); \ - } \ +# define DETACH(t) \ + STMT_START { \ + if (pthread_detach((t)->self)) { \ + MUTEX_UNLOCK(&(t)->mutex); \ + Perl_croak_nocontext("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"); \ +# define JOIN(t, avp) \ + STMT_START { \ + if (pthread_join((t)->self, (void**)(avp))) \ + Perl_croak_nocontext("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"); \ +/* 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__)) /* 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) +#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"); \ } STMT_END -#endif /* SET_THR */ +#endif /* PERL_SET_CONTEXT */ #ifndef INIT_THREADS # ifdef NEED_PTHREAD_INIT @@ -242,31 +294,39 @@ struct perl_thread *getTHR (void); # endif #endif +#ifndef ALLOC_THREAD_KEY +# define ALLOC_THREAD_KEY \ + STMT_START { \ + if (pthread_key_create(&PL_thr_key, 0)) { \ + PerlIO_printf(PerlIO_stderr(), "panic: pthread_key_create"); \ + 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) - -/* - * 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. - */ -# if !defined(dTHR) -# define dTHR \ - struct perl_thread *thr = PL_threadnum ? THR : (struct perl_thread*)SvPVX(PL_thrsv) -# endif /* dTHR */ - -# if !defined(THR) -# define THR ((struct perl_thread *) pthread_getspecific(PL_thr_key)) -# endif - +#if defined(USE_5005THREADS) /* Accessor for per-thread SVs */ # define THREADSV(i) (thr->threadsvp[i]) @@ -284,7 +344,10 @@ struct perl_thread *getTHR (void); # 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) +# define LOCK_SV_LOCK_MUTEX MUTEX_LOCK(&PL_sv_lock_mutex) +# define UNLOCK_SV_LOCK_MUTEX MUTEX_UNLOCK(&PL_sv_lock_mutex) /* Values and macros for thr->flags */ #define THRf_STATE_MASK 7 @@ -317,25 +380,17 @@ typedef struct condpair { #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_5005THREADS */ +#endif /* USE_5005THREADS || USE_ITHREADS */ #ifndef MUTEX_LOCK # define MUTEX_LOCK(m) #endif -#ifndef MUTEX_LOCK_NOCONTEXT -# define MUTEX_LOCK_NOCONTEXT(m) -#endif - #ifndef MUTEX_UNLOCK # define MUTEX_UNLOCK(m) #endif -#ifndef MUTEX_UNLOCK_NOCONTEXT -# define MUTEX_UNLOCK_NOCONTEXT(m) -#endif - #ifndef MUTEX_INIT # define MUTEX_INIT(m) #endif @@ -388,8 +443,29 @@ typedef struct condpair { # define UNLOCK_CRED_MUTEX #endif +#ifndef LOCK_FDPID_MUTEX +# define LOCK_FDPID_MUTEX +#endif + +#ifndef UNLOCK_FDPID_MUTEX +# 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 + +/* THR, SET_THR, and dTHR are there for compatibility with old versions */ #ifndef THR -# define THR +# define THR PERL_GET_THX +#endif + +#ifndef SET_THR +# define SET_THR(t) PERL_SET_THX(t) #endif #ifndef dTHR