-#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 <builtins.h>
+#endif
#ifdef WIN32
# include <win32thread.h>
#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 <nw5thread.h>
#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 <mach/cthreads.h> 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 $@, $/ and so on */
- bool Ttainted;
- PMOP * Tcurpm;
- SV * Tnrs;
- SV * Trs;
- GV * Tlast_in_gv;
- char * Tofs;
- STRLEN Tofslen;
- GV * Tdefoutgv;
- char * Tchopset;
- SV * Tformtarget;
- SV * Tbodytarget;
- SV * Ttoptarget;
-
- /* Stashes */
- HV * Tdefstash;
- HV * Tcurstash;
-
- /* Stacks */
- SV ** Ttmps_stack;
- I32 Ttmps_ix;
- I32 Ttmps_floor;
- I32 Ttmps_max;
-
- int Tin_eval;
- OP * Trestartop;
- int Tdelaymagic;
- bool Tdirty;
- U8 Tlocalizing;
- COP * Tcurcop;
-
- PERL_CONTEXT * Tcxstack;
- I32 Tcxstack_ix;
- I32 Tcxstack_max;
-
- AV * Tcurstack;
- AV * Tmainstack;
- JMPENV * Ttop_env;
-
- /* XXX Sort stuff, firstgv, secongv and so on? */
-
- SV * oursv;
- HV * cvcache;
- perl_thread self; /* Underlying thread object */
- U32 flags;
- AV * threadsv; /* Per-thread SVs ($_, $@ etc.) */
- 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_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_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 start_env
-#undef toptarget
-#undef top_env
-#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 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