X-Git-Url: https://perl5.git.perl.org/perl5.git/blobdiff_plain/c09156bb55f832ab6700e99026187942841f0ae4..554627f6cca63a97a56622204edb354e6a52c0ca:/thread.h diff --git a/thread.h b/thread.h index d2455dc..20152f3 100644 --- a/thread.h +++ b/thread.h @@ -1,404 +1,470 @@ -#ifdef USE_THREADS +/* thread.h + * + * Copyright (C) 1999, 2000, 2001, 2002, 2004, 2005 + * 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 - -/* POSIXish threads */ -typedef pthread_t perl_thread; -#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 +#ifdef NETWARE +# include #else -# define pthread_mutexattr_default NULL -# define pthread_condattr_default NULL -# define pthread_attr_default NULL -#endif /* OLD_PTHREADS_API */ +# 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 DJGPP +# define pthread_addr_t any_t +# define NEED_PTHREAD_INIT +# define PTHREAD_CREATE_JOINABLE (1) +# endif +# 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) +# 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(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 +/* 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 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_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_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 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 -# define YIELD sched_yield() +# ifdef SCHED_YIELD +# define YIELD SCHED_YIELD +# else +# ifdef HAS_SCHED_YIELD +# define YIELD sched_yield() +# else +# ifdef HAS_PTHREAD_YIELD + /* pthread_yield(NULL) platforms are expected + * to have #defined YIELD for themselves. */ +# define YIELD pthread_yield() +# endif +# endif +# endif +#endif + +#ifdef __hpux +# define MUTEX_INIT_NEEDS_MUTEX_ZEROED #endif #ifndef MUTEX_INIT -#define MUTEX_INIT(m) \ + +# ifdef MUTEX_INIT_NEEDS_MUTEX_ZEROED + /* Temporary workaround, true bug is deeper. --jhi 1999-02-25 */ +# define MUTEX_INIT(m) \ STMT_START { \ - if (pthread_mutex_init((m), pthread_mutexattr_default)) \ - croak("panic: MUTEX_INIT"); \ + 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 -#define MUTEX_LOCK(m) \ - STMT_START { \ - if (pthread_mutex_lock((m))) \ - croak("panic: MUTEX_LOCK"); \ +# 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 -#define MUTEX_UNLOCK(m) \ - STMT_START { \ - if (pthread_mutex_unlock((m))) \ - croak("panic: MUTEX_UNLOCK"); \ +# endif + +# define MUTEX_LOCK(m) \ + STMT_START { \ + int _eC_; \ + if ((_eC_ = pthread_mutex_lock((m)))) \ + Perl_croak_nocontext("panic: MUTEX_LOCK (%d) [%s:%d]", \ + _eC_, __FILE__, __LINE__); \ } STMT_END -#define MUTEX_DESTROY(m) \ - STMT_START { \ - if (pthread_mutex_destroy((m))) \ - croak("panic: MUTEX_DESTROY"); \ + +# define MUTEX_UNLOCK(m) \ + STMT_START { \ + 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 { \ + 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) \ +# define COND_INIT(c) \ STMT_START { \ - if (pthread_cond_init((c), pthread_condattr_default)) \ - croak("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))) \ - croak("panic: COND_SIGNAL"); \ + +# 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 { \ - if (pthread_cond_broadcast((c))) \ - croak("panic: COND_BROADCAST"); \ + +# 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 { \ - if (pthread_cond_wait((c), (m))) \ - croak("panic: COND_WAIT"); \ + +# 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 { \ - if (pthread_cond_destroy((c))) \ - croak("panic: COND_DESTROY"); \ + +# 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 */ /* 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"); \ - } \ +# 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 { \ - if (pthread_join((t)->self, (void**)(avp))) \ - croak("panic: pthread_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 */ -#ifndef SET_THR -#define SET_THR(t) \ - STMT_START { \ - if (pthread_setspecific(thr_key, (void *) (t))) \ - croak("panic: pthread_setspecific"); \ - } STMT_END -#endif /* SET_THR */ +/* 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 -#ifndef THR -# ifdef OLD_PTHREADS_API -struct thread *getTHR _((void)); -# define THR getTHR() -# else -# define THR ((struct thread *) pthread_getspecific(thr_key)) -# endif /* OLD_PTHREADS_API */ -#endif /* THR */ +#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 dTHR -# define dTHR struct thread *thr = THR -#endif /* dTHR */ +#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 { \ + 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 */ #ifndef INIT_THREADS # ifdef NEED_PTHREAD_INIT # define INIT_THREADS pthread_init() -# else -# define INIT_THREADS NOOP # endif #endif +#ifndef ALLOC_THREAD_KEY +# define ALLOC_THREAD_KEY \ + STMT_START { \ + int _eC_; \ + if ((_eC_ = pthread_key_create(&PL_thr_key, 0))) { \ + write(2, "panic: pthread_key_create failed\n", 33); \ + 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 */ -struct thread { - /* The fields that used to be global */ - /* Important ones in the first cache line (if alignment is done right) */ - SV ** Tstack_sp; -#ifdef OP_IN_REGISTER - OP * Topsave; -#else - OP * Top; -#endif - SV ** Tcurpad; - SV ** Tstack_base; - - SV ** Tstack_max; - - I32 * Tscopestack; - I32 Tscopestack_ix; - I32 Tscopestack_max; - - ANY * Tsavestack; - I32 Tsavestack_ix; - I32 Tsavestack_max; - - OP ** Tretstack; - I32 Tretstack_ix; - I32 Tretstack_max; - - I32 * Tmarkstack; - I32 * Tmarkstack_ptr; - I32 * Tmarkstack_max; - - SV * TSv; - XPV * TXpv; - struct stat Tstatbuf; - struct tms Ttimesbuf; - - /* XXX What about regexp stuff? */ - - /* Now the fields that used to be "per interpreter" (even when global) */ - - /* Fields used by magic variables such as $@, $/ and so on */ - bool Ttainted; - PMOP * Tcurpm; - SV * Tnrs; - SV * Trs; - GV * Tlast_in_gv; - char * Tofs; - STRLEN Tofslen; - GV * Tdefoutgv; - char * Tchopset; - SV * Tformtarget; - SV * Tbodytarget; - SV * Ttoptarget; - - /* Stashes */ - HV * Tdefstash; - HV * Tcurstash; - - /* Stacks */ - SV ** Ttmps_stack; - I32 Ttmps_ix; - I32 Ttmps_floor; - I32 Ttmps_max; - - int Tin_eval; - OP * Trestartop; - int Tdelaymagic; - bool Tdirty; - U8 Tlocalizing; - COP * Tcurcop; - - PERL_CONTEXT * Tcxstack; - I32 Tcxstack_ix; - I32 Tcxstack_max; - - AV * Tcurstack; - AV * Tmainstack; - JMPENV * Ttop_env; - I32 Trunlevel; - - /* XXX Sort stuff, firstgv, secongv and so on? */ - - SV * oursv; - HV * cvcache; - perl_thread self; /* Underlying thread object */ - U32 flags; - AV * magicals; /* Per-thread magicals */ - AV * specific; /* Thread-specific user data */ - SV * errsv; /* Backing SV for $@ */ - HV * errhv; /* HV for what was %@ in pp_ctl.c */ - perl_mutex mutex; /* For the fields others can change */ - U32 tid; - struct thread *next, *prev; /* Circular linked list of threads */ - JMPENV Tstart_env; /* Top of top_env longjmp() chain */ -#ifdef HAVE_THREAD_INTERN - struct thread_intern i; /* Platform-dependent internals */ -#endif - char trailing_nul; /* For the sake of thrsv and oursv */ -}; - -typedef struct thread *Thread; - -/* 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_DIE_FATAL 8 - -/* ThrSTATE(t) and ThrSETSTATE(t) must only be called while holding t->mutex */ -#define ThrSTATE(t) ((t)->flags) -#define ThrSETSTATE(t, s) STMT_START { \ - (t)->flags &= ~THRf_STATE_MASK; \ - (t)->flags |= (s); \ - DEBUG_L(PerlIO_printf(PerlIO_stderr(), \ - "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 - -#undef stack_base -#undef stack_sp -#undef stack_max -#undef curstack -#undef mainstack -#undef markstack -#undef markstack_ptr -#undef markstack_max -#undef scopestack -#undef scopestack_ix -#undef scopestack_max -#undef savestack -#undef savestack_ix -#undef savestack_max -#undef retstack -#undef retstack_ix -#undef retstack_max -#undef curcop -#undef cxstack -#undef cxstack_ix -#undef cxstack_max -#undef defstash -#undef curstash -#undef tmps_stack -#undef tmps_floor -#undef tmps_ix -#undef tmps_max -#undef curpad -#undef Sv -#undef Xpv -#undef statbuf -#undef timesbuf -#undef tainted -#undef curpm -#undef nrs -#undef rs -#undef last_in_gv -#undef ofs -#undef ofslen -#undef defoutgv -#undef chopset -#undef formtarget -#undef bodytarget -#undef toptarget -#undef top_env -#undef runlevel -#undef in_eval -#undef restartop -#undef delaymagic -#undef dirty -#undef localizing - -#define stack_base (thr->Tstack_base) -#define stack_sp (thr->Tstack_sp) -#define stack_max (thr->Tstack_max) -#ifdef OP_IN_REGISTER -#define opsave (thr->Topsave) -#else -#undef op -#define op (thr->Top) -#endif -#define curcop (thr->Tcurcop) -#define stack (thr->Tstack) -#define curstack (thr->Tcurstack) -#define mainstack (thr->Tmainstack) -#define markstack (thr->Tmarkstack) -#define markstack_ptr (thr->Tmarkstack_ptr) -#define markstack_max (thr->Tmarkstack_max) -#define scopestack (thr->Tscopestack) -#define scopestack_ix (thr->Tscopestack_ix) -#define scopestack_max (thr->Tscopestack_max) - -#define savestack (thr->Tsavestack) -#define savestack_ix (thr->Tsavestack_ix) -#define savestack_max (thr->Tsavestack_max) - -#define retstack (thr->Tretstack) -#define retstack_ix (thr->Tretstack_ix) -#define retstack_max (thr->Tretstack_max) - -#define cxstack (thr->Tcxstack) -#define cxstack_ix (thr->Tcxstack_ix) -#define cxstack_max (thr->Tcxstack_max) - -#define curpad (thr->Tcurpad) -#define Sv (thr->TSv) -#define Xpv (thr->TXpv) -#define statbuf (thr->Tstatbuf) -#define timesbuf (thr->Ttimesbuf) -#define tainted (thr->Ttainted) -#define tainted (thr->Ttainted) -#define curpm (thr->Tcurpm) -#define nrs (thr->Tnrs) -#define rs (thr->Trs) -#define last_in_gv (thr->Tlast_in_gv) -#define ofs (thr->Tofs) -#define ofslen (thr->Tofslen) -#define defoutgv (thr->Tdefoutgv) -#define chopset (thr->Tchopset) -#define formtarget (thr->Tformtarget) -#define bodytarget (thr->Tbodytarget) -#define toptarget (thr->Ttoptarget) -#define defstash (thr->Tdefstash) -#define curstash (thr->Tcurstash) - -#define tmps_stack (thr->Ttmps_stack) -#define tmps_ix (thr->Ttmps_ix) -#define tmps_floor (thr->Ttmps_floor) -#define tmps_max (thr->Ttmps_max) - -#define in_eval (thr->Tin_eval) -#define restartop (thr->Trestartop) -#define delaymagic (thr->Tdelaymagic) -#define dirty (thr->Tdirty) -#define localizing (thr->Tlocalizing) - -#define top_env (thr->Ttop_env) -#define runlevel (thr->Trunlevel) -#define start_env (thr->Tstart_env) +#endif /* USE_ITHREADS */ -#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 THR -/* Rats: if dTHR is just blank then the subsequent ";" throws an error */ -#define dTHR extern int errno -#endif /* USE_THREADS */ +#ifndef MUTEX_LOCK +# define MUTEX_LOCK(m) +#endif + +#ifndef MUTEX_UNLOCK +# define MUTEX_UNLOCK(m) +#endif + +#ifndef MUTEX_INIT +# define MUTEX_INIT(m) +#endif + +#ifndef MUTEX_DESTROY +# define MUTEX_DESTROY(m) +#endif + +#ifndef COND_INIT +# define COND_INIT(c) +#endif + +#ifndef COND_SIGNAL +# define COND_SIGNAL(c) +#endif + +#ifndef COND_BROADCAST +# define COND_BROADCAST(c) +#endif + +#ifndef COND_WAIT +# define COND_WAIT(c, m) +#endif + +#ifndef COND_DESTROY +# define COND_DESTROY(c) +#endif + +#ifndef LOCK_SV_MUTEX +# define LOCK_SV_MUTEX +#endif + +#ifndef UNLOCK_SV_MUTEX +# define UNLOCK_SV_MUTEX +#endif + +#ifndef LOCK_STRTAB_MUTEX +# define LOCK_STRTAB_MUTEX +#endif + +#ifndef UNLOCK_STRTAB_MUTEX +# define UNLOCK_STRTAB_MUTEX +#endif + +#ifndef LOCK_CRED_MUTEX +# define LOCK_CRED_MUTEX +#endif + +#ifndef UNLOCK_CRED_MUTEX +# 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 + +#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 +#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