+#define PERL_NO_GET_CONTEXT
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
#endif
static void
-remove_thread(struct perl_thread *t)
+remove_thread(pTHX_ Thread t)
{
-#ifdef USE_THREADS
- DEBUG_S(WITH_THR(PerlIO_printf(PerlIO_stderr(),
- "%p: remove_thread %p\n", thr, t)));
- MUTEX_LOCK(&PL_threads_mutex);
- MUTEX_DESTROY(&t->mutex);
- PL_nthreads--;
- t->prev->next = t->next;
- t->next->prev = t->prev;
- COND_BROADCAST(&PL_nthreads_cond);
- MUTEX_UNLOCK(&PL_threads_mutex);
-#endif
}
static THREAD_RET_TYPE
threadstart(void *arg)
{
-#ifdef USE_THREADS
-#ifdef FAKE_THREADS
- Thread savethread = thr;
- LOGOP myop;
- dSP;
- I32 oldscope = PL_scopestack_ix;
- I32 retval;
- AV *av;
- int i;
-
- DEBUG_S(PerlIO_printf(PerlIO_stderr(), "new thread %p starting at %s\n",
- thr, SvPEEK(TOPs)));
- thr = (Thread) arg;
- savemark = TOPMARK;
- thr->prev = thr->prev_run = savethread;
- thr->next = savethread->next;
- thr->next_run = savethread->next_run;
- savethread->next = savethread->next_run = thr;
- thr->wait_queue = 0;
- thr->private = 0;
-
- /* Now duplicate most of perl_call_sv but with a few twists */
- PL_op = (OP*)&myop;
- Zero(PL_op, 1, LOGOP);
- myop.op_flags = OPf_STACKED;
- myop.op_next = Nullop;
- myop.op_flags |= OPf_KNOW;
- myop.op_flags |= OPf_WANT_LIST;
- PL_op = pp_entersub(ARGS);
- DEBUG_S(if (!PL_op)
- PerlIO_printf(PerlIO_stderr(), "thread starts at Nullop\n"));
- /*
- * When this thread is next scheduled, we start in the right
- * place. When the thread runs off the end of the sub, perl.c
- * handles things, using savemark to figure out how much of the
- * stack is the return value for any join.
- */
- thr = savethread; /* back to the old thread */
- return 0;
-#else
- Thread thr = (Thread) arg;
- LOGOP myop;
- djSP;
- I32 oldmark = TOPMARK;
- I32 oldscope = PL_scopestack_ix;
- I32 retval;
- SV *sv;
- AV *av = newAV();
- int i, ret;
- dJMPENV;
- DEBUG_S(PerlIO_printf(PerlIO_stderr(), "new thread %p waiting to start\n",
- thr));
-
- /* Don't call *anything* requiring dTHR until after SET_THR() */
- /*
- * Wait until our creator releases us. If we didn't do this, then
- * it would be potentially possible for out thread to carry on and
- * do stuff before our creator fills in our "self" field. For example,
- * if we went and created another thread which tried to JOIN with us,
- * then we'd be in a mess.
- */
- MUTEX_LOCK(&thr->mutex);
- MUTEX_UNLOCK(&thr->mutex);
-
- /*
- * It's safe to wait until now to set the thread-specific pointer
- * from our pthread_t structure to our struct perl_thread, since
- * we're the only thread who can get at it anyway.
- */
- SET_THR(thr);
-
- /* Only now can we use SvPEEK (which calls sv_newmortal which does dTHR) */
- DEBUG_S(PerlIO_printf(PerlIO_stderr(), "new thread %p starting at %s\n",
- thr, SvPEEK(TOPs)));
-
- sv = POPs;
- PUTBACK;
- ENTER;
- SAVETMPS;
- perl_call_sv(sv, G_ARRAY|G_EVAL);
- SPAGAIN;
- retval = SP - (PL_stack_base + oldmark);
- SP = PL_stack_base + oldmark + 1;
- if (SvCUR(thr->errsv)) {
- MUTEX_LOCK(&thr->mutex);
- thr->flags |= THRf_DID_DIE;
- MUTEX_UNLOCK(&thr->mutex);
- av_store(av, 0, &PL_sv_no);
- av_store(av, 1, newSVsv(thr->errsv));
- DEBUG_S(PerlIO_printf(PerlIO_stderr(), "%p died: %s\n",
- thr, SvPV(thr->errsv, PL_na)));
- } else {
- DEBUG_S(STMT_START {
- for (i = 1; i <= retval; i++) {
- PerlIO_printf(PerlIO_stderr(), "%p return[%d] = %s\n",
- thr, i, SvPEEK(SP[i - 1]));
- }
- } STMT_END);
- av_store(av, 0, &PL_sv_yes);
- for (i = 1; i <= retval; i++, SP++)
- sv_setsv(*av_fetch(av, i, TRUE), SvREFCNT_inc(*SP));
- }
- FREETMPS;
- LEAVE;
-
- finishoff:
-#if 0
- /* removed for debug */
- SvREFCNT_dec(PL_curstack);
-#endif
- SvREFCNT_dec(thr->cvcache);
- SvREFCNT_dec(thr->threadsv);
- SvREFCNT_dec(thr->specific);
- SvREFCNT_dec(thr->errsv);
- SvREFCNT_dec(thr->errhv);
-
- /*Safefree(cxstack);*/
- while (PL_curstackinfo->si_next)
- PL_curstackinfo = PL_curstackinfo->si_next;
- while (PL_curstackinfo) {
- PERL_SI *p = PL_curstackinfo->si_prev;
- SvREFCNT_dec(PL_curstackinfo->si_stack);
- Safefree(PL_curstackinfo->si_cxstack);
- Safefree(PL_curstackinfo);
- PL_curstackinfo = p;
- }
- Safefree(PL_markstack);
- Safefree(PL_scopestack);
- Safefree(PL_savestack);
- Safefree(PL_retstack);
- Safefree(PL_tmps_stack);
- Safefree(PL_ofs);
-
- SvREFCNT_dec(PL_rs);
- SvREFCNT_dec(PL_nrs);
- SvREFCNT_dec(PL_statname);
- Safefree(PL_screamfirst);
- Safefree(PL_screamnext);
- Safefree(PL_reg_start_tmp);
- SvREFCNT_dec(PL_lastscream);
- SvREFCNT_dec(PL_defoutgv);
-
- MUTEX_LOCK(&thr->mutex);
- DEBUG_S(PerlIO_printf(PerlIO_stderr(),
- "%p: threadstart finishing: state is %u\n",
- thr, ThrSTATE(thr)));
- switch (ThrSTATE(thr)) {
- case THRf_R_JOINABLE:
- ThrSETSTATE(thr, THRf_ZOMBIE);
- MUTEX_UNLOCK(&thr->mutex);
- DEBUG_S(PerlIO_printf(PerlIO_stderr(),
- "%p: R_JOINABLE thread finished\n", thr));
- break;
- case THRf_R_JOINED:
- ThrSETSTATE(thr, THRf_DEAD);
- MUTEX_UNLOCK(&thr->mutex);
- remove_thread(thr);
- DEBUG_S(PerlIO_printf(PerlIO_stderr(),
- "%p: R_JOINED thread finished\n", thr));
- break;
- case THRf_R_DETACHED:
- ThrSETSTATE(thr, THRf_DEAD);
- MUTEX_UNLOCK(&thr->mutex);
- SvREFCNT_dec(av);
- DEBUG_S(PerlIO_printf(PerlIO_stderr(),
- "%p: DETACHED thread finished\n", thr));
- remove_thread(thr); /* This might trigger main thread to finish */
- break;
- default:
- MUTEX_UNLOCK(&thr->mutex);
- croak("panic: illegal state %u at end of threadstart", ThrSTATE(thr));
- /* NOTREACHED */
- }
- return THREAD_RET_CAST(av); /* Available for anyone to join with */
- /* us unless we're detached, in which */
- /* case noone sees the value anyway. */
-#endif
-#else
return THREAD_RET_CAST(NULL);
-#endif
}
static SV *
-newthread (SV *startsv, AV *initargs, char *classname)
+newthread (pTHX_ SV *startsv, AV *initargs, char *classname)
{
-#ifdef USE_THREADS
- dSP;
- Thread savethread;
- int i;
- SV *sv;
- int err;
-#ifndef THREAD_CREATE
- static pthread_attr_t attr;
- static int attr_inited = 0;
- sigset_t fullmask, oldmask;
- static int attr_joinable = PTHREAD_CREATE_JOINABLE;
-#endif
-
- savethread = thr;
- thr = new_struct_thread(thr);
- /* temporarily pretend to be the child thread in case the
- * XPUSHs() below want to grow the child's stack. This is
- * safe, since the other thread is not yet created, and we
- * are the only ones who know about it */
- SET_THR(thr);
- SPAGAIN;
- DEBUG_S(PerlIO_printf(PerlIO_stderr(),
- "%p: newthread (%p), tid is %u, preparing stack\n",
- savethread, thr, thr->tid));
- /* The following pushes the arg list and startsv onto the *new* stack */
- PUSHMARK(SP);
- /* Could easily speed up the following greatly */
- for (i = 0; i <= AvFILL(initargs); i++)
- XPUSHs(SvREFCNT_inc(*av_fetch(initargs, i, FALSE)));
- XPUSHs(SvREFCNT_inc(startsv));
- PUTBACK;
-
- /* On your marks... */
- SET_THR(savethread);
- MUTEX_LOCK(&thr->mutex);
-
-#ifdef THREAD_CREATE
- err = THREAD_CREATE(thr, threadstart);
-#else
- /* Get set... */
- sigfillset(&fullmask);
- if (sigprocmask(SIG_SETMASK, &fullmask, &oldmask) == -1)
- croak("panic: sigprocmask");
- err = 0;
- if (!attr_inited) {
- attr_inited = 1;
- err = pthread_attr_init(&attr);
-# ifdef PTHREAD_ATTR_SETDETACHSTATE
- if (err == 0)
- err = PTHREAD_ATTR_SETDETACHSTATE(&attr, attr_joinable);
-
-# else
- croak("panic: can't pthread_attr_setdetachstate");
-# endif
- }
- if (err == 0)
- err = PTHREAD_CREATE(&thr->self, attr, threadstart, (void*) thr);
-#endif
-
- if (err) {
- MUTEX_UNLOCK(&thr->mutex);
- DEBUG_S(PerlIO_printf(PerlIO_stderr(),
- "%p: create of %p failed %d\n",
- savethread, thr, err));
- /* Thread creation failed--clean up */
- SvREFCNT_dec(thr->cvcache);
- remove_thread(thr);
- MUTEX_DESTROY(&thr->mutex);
- for (i = 0; i <= AvFILL(initargs); i++)
- SvREFCNT_dec(*av_fetch(initargs, i, FALSE));
- SvREFCNT_dec(startsv);
- return NULL;
- }
-
-#ifdef THREAD_POST_CREATE
- THREAD_POST_CREATE(thr);
+#ifdef USE_ITHREADS
+ croak("This perl was built for \"ithreads\", which currently does not support Thread.pm.\n"
+ "Run \"perldoc Thread\" for more information");
#else
- if (sigprocmask(SIG_SETMASK, &oldmask, 0))
- croak("panic: sigprocmask");
-#endif
-
- sv = newSViv(thr->tid);
- sv_magic(sv, thr->oursv, '~', 0, 0);
- SvMAGIC(sv)->mg_private = Thread_MAGIC_SIGNATURE;
- sv = sv_bless(newRV_noinc(sv), gv_stashpv(classname, TRUE));
-
- /* Go */
- MUTEX_UNLOCK(&thr->mutex);
-
- return sv;
-#else
- croak("No threads in this perl");
- return &PL_sv_undef;
+ croak("This perl was not built with support for 5.005-style threads.\n"
+ "Run \"perldoc Thread\" for more information");
#endif
+ return &PL_sv_undef;
}
-static Signal_t handle_thread_signal _((int sig));
+static Signal_t handle_thread_signal (int sig);
static Signal_t
handle_thread_signal(int sig)
{
unsigned char c = (unsigned char) sig;
+ dTHX;
/*
* We're not really allowed to call fprintf in a signal handler
* so don't be surprised if this isn't robust while debugging
* with -DL.
*/
- DEBUG_S(PerlIO_printf(PerlIO_stderr(),
- "handle_thread_signal: got signal %d\n", sig););
+ DEBUG_S(PerlIO_printf(Perl_debug_log,
+ "handle_thread_signal: got signal %d\n", sig));
write(sig_pipe[1], &c, 1);
}
SV * startsv
AV * av = av_make(items - 2, &ST(2));
PPCODE:
- XPUSHs(sv_2mortal(newthread(startsv, av, classname)));
+ XPUSHs(sv_2mortal(newthread(aTHX_ startsv, av, classname)));
void
join(t)
Thread t
- AV * av = NO_INIT
- int i = NO_INIT
- PPCODE:
-#ifdef USE_THREADS
- DEBUG_S(PerlIO_printf(PerlIO_stderr(), "%p: joining %p (state %u)\n",
- thr, t, ThrSTATE(t)););
- MUTEX_LOCK(&t->mutex);
- switch (ThrSTATE(t)) {
- case THRf_R_JOINABLE:
- case THRf_R_JOINED:
- ThrSETSTATE(t, THRf_R_JOINED);
- MUTEX_UNLOCK(&t->mutex);
- break;
- case THRf_ZOMBIE:
- ThrSETSTATE(t, THRf_DEAD);
- MUTEX_UNLOCK(&t->mutex);
- remove_thread(t);
- break;
- default:
- MUTEX_UNLOCK(&t->mutex);
- croak("can't join with thread");
- /* NOTREACHED */
- }
- JOIN(t, &av);
-
- if (SvTRUE(*av_fetch(av, 0, FALSE))) {
- /* Could easily speed up the following if necessary */
- for (i = 1; i <= AvFILL(av); i++)
- XPUSHs(sv_2mortal(*av_fetch(av, i, FALSE)));
- } else {
- STRLEN n_a;
- char *mess = SvPV(*av_fetch(av, 1, FALSE), n_a);
- DEBUG_S(PerlIO_printf(PerlIO_stderr(),
- "%p: join propagating die message: %s\n",
- thr, mess));
- croak(mess);
- }
+ PREINIT:
+#ifdef USE_5005THREADS
+ AV * av;
+ int i;
#endif
+ PPCODE:
void
detach(t)
Thread t
CODE:
-#ifdef USE_THREADS
- DEBUG_S(PerlIO_printf(PerlIO_stderr(), "%p: detaching %p (state %u)\n",
- thr, t, ThrSTATE(t)););
- MUTEX_LOCK(&t->mutex);
- switch (ThrSTATE(t)) {
- case THRf_R_JOINABLE:
- ThrSETSTATE(t, THRf_R_DETACHED);
- /* fall through */
- case THRf_R_DETACHED:
- DETACH(t);
- MUTEX_UNLOCK(&t->mutex);
- break;
- case THRf_ZOMBIE:
- ThrSETSTATE(t, THRf_DEAD);
- DETACH(t);
- MUTEX_UNLOCK(&t->mutex);
- remove_thread(t);
- break;
- default:
- MUTEX_UNLOCK(&t->mutex);
- croak("can't detach thread");
- /* NOTREACHED */
- }
-#endif
void
equal(t1, t2)
flags(t)
Thread t
PPCODE:
-#ifdef USE_THREADS
- PUSHs(sv_2mortal(newSViv(t->flags)));
-#endif
+
+void
+done(t)
+ Thread t
+ PPCODE:
void
self(classname)
char * classname
PREINIT:
+#ifdef USE_5005THREADS
SV *sv;
- PPCODE:
-#ifdef USE_THREADS
- sv = newSViv(thr->tid);
- sv_magic(sv, thr->oursv, '~', 0, 0);
- SvMAGIC(sv)->mg_private = Thread_MAGIC_SIGNATURE;
- PUSHs(sv_2mortal(sv_bless(newRV_noinc(sv),
- gv_stashpv(classname, TRUE))));
#endif
+ PPCODE:
U32
tid(t)
Thread t
CODE:
-#ifdef USE_THREADS
- MUTEX_LOCK(&t->mutex);
- RETVAL = t->tid;
- MUTEX_UNLOCK(&t->mutex);
-#else
RETVAL = 0;
-#endif
OUTPUT:
RETVAL
DESTROY(t)
SV * t
PPCODE:
- PUSHs(&PL_sv_yes);
+ PUSHs(t ? &PL_sv_yes : &PL_sv_no);
void
yield()
CODE:
-{
-#ifdef USE_THREADS
- YIELD;
-#endif
-}
void
cond_wait(sv)
SV * sv
- MAGIC * mg = NO_INIT
CODE:
-#ifdef USE_THREADS
- if (SvROK(sv))
- sv = SvRV(sv);
-
- mg = condpair_magic(sv);
- DEBUG_S(PerlIO_printf(PerlIO_stderr(), "%p: cond_wait %p\n", thr, sv));
- MUTEX_LOCK(MgMUTEXP(mg));
- if (MgOWNER(mg) != thr) {
- MUTEX_UNLOCK(MgMUTEXP(mg));
- croak("cond_wait for lock that we don't own\n");
- }
- MgOWNER(mg) = 0;
- COND_SIGNAL(MgOWNERCONDP(mg));
- COND_WAIT(MgCONDP(mg), MgMUTEXP(mg));
- while (MgOWNER(mg))
- COND_WAIT(MgOWNERCONDP(mg), MgMUTEXP(mg));
- MgOWNER(mg) = thr;
- MUTEX_UNLOCK(MgMUTEXP(mg));
-#endif
void
cond_signal(sv)
SV * sv
- MAGIC * mg = NO_INIT
CODE:
-#ifdef USE_THREADS
- if (SvROK(sv))
- sv = SvRV(sv);
-
- mg = condpair_magic(sv);
- DEBUG_S(PerlIO_printf(PerlIO_stderr(), "%p: cond_signal %p\n",thr,sv));
- MUTEX_LOCK(MgMUTEXP(mg));
- if (MgOWNER(mg) != thr) {
- MUTEX_UNLOCK(MgMUTEXP(mg));
- croak("cond_signal for lock that we don't own\n");
- }
- COND_SIGNAL(MgCONDP(mg));
- MUTEX_UNLOCK(MgMUTEXP(mg));
-#endif
void
cond_broadcast(sv)
SV * sv
- MAGIC * mg = NO_INIT
CODE:
-#ifdef USE_THREADS
- if (SvROK(sv))
- sv = SvRV(sv);
-
- mg = condpair_magic(sv);
- DEBUG_S(PerlIO_printf(PerlIO_stderr(), "%p: cond_broadcast %p\n",
- thr, sv));
- MUTEX_LOCK(MgMUTEXP(mg));
- if (MgOWNER(mg) != thr) {
- MUTEX_UNLOCK(MgMUTEXP(mg));
- croak("cond_broadcast for lock that we don't own\n");
- }
- COND_BROADCAST(MgCONDP(mg));
- MUTEX_UNLOCK(MgMUTEXP(mg));
-#endif
void
list(classname)
char * classname
- PREINIT:
- Thread t;
- AV * av;
- SV ** svp;
- int n = 0;
PPCODE:
-#ifdef USE_THREADS
- av = newAV();
- /*
- * Iterate until we have enough dynamic storage for all threads.
- * We mustn't do any allocation while holding threads_mutex though.
- */
- MUTEX_LOCK(&PL_threads_mutex);
- do {
- n = PL_nthreads;
- MUTEX_UNLOCK(&PL_threads_mutex);
- if (AvFILL(av) < n - 1) {
- int i = AvFILL(av);
- for (i = AvFILL(av); i < n - 1; i++) {
- SV *sv = newSViv(0); /* fill in tid later */
- sv_magic(sv, 0, '~', 0, 0); /* fill in other magic later */
- av_push(av, sv_bless(newRV_noinc(sv),
- gv_stashpv(classname, TRUE)));
-
- }
- }
- MUTEX_LOCK(&PL_threads_mutex);
- } while (n < PL_nthreads);
- n = PL_nthreads; /* Get the final correct value */
-
- /*
- * At this point, there's enough room to fill in av.
- * Note that we are holding threads_mutex so the list
- * won't change out from under us but all the remaining
- * processing is "fast" (no blocking, malloc etc.)
- */
- t = thr;
- svp = AvARRAY(av);
- do {
- SV *sv = (SV*)SvRV(*svp);
- sv_setiv(sv, t->tid);
- SvMAGIC(sv)->mg_obj = SvREFCNT_inc(t->oursv);
- SvMAGIC(sv)->mg_flags |= MGf_REFCOUNTED;
- SvMAGIC(sv)->mg_private = Thread_MAGIC_SIGNATURE;
- t = t->next;
- svp++;
- } while (t != thr);
- /* */
- MUTEX_UNLOCK(&PL_threads_mutex);
- /* Truncate any unneeded slots in av */
- av_fill(av, n - 1);
- /* Finally, push all the new objects onto the stack and drop av */
- EXTEND(SP, n);
- for (svp = AvARRAY(av); n > 0; n--, svp++)
- PUSHs(*svp);
- (void)sv_2mortal((SV*)av);
-#endif
MODULE = Thread PACKAGE = Thread::Signal
ST(0) = sv_newmortal();
if (ret)
sv_setsv(ST(0), c ? PL_psig_ptr[c] : &PL_sv_no);
- DEBUG_S(PerlIO_printf(PerlIO_stderr(),
- "await_signal returning %s\n", SvPEEK(ST(0))););
+ DEBUG_S(PerlIO_printf(Perl_debug_log,
+ "await_signal returning %s\n", SvPEEK(ST(0))));
MODULE = Thread PACKAGE = Thread::Specific
data(classname = "Thread::Specific")
char * classname
PPCODE:
-#ifdef USE_THREADS
- if (AvFILL(thr->specific) == -1) {
- GV *gv = gv_fetchpv("Thread::Specific::FIELDS", TRUE, SVt_PVHV);
- av_store(thr->specific, 0, newRV((SV*)GvHV(gv)));
- }
- XPUSHs(sv_bless(newRV((SV*)thr->specific),gv_stashpv(classname,TRUE)));
-#endif
https://perl5.git.perl.org / perl5.git / blobdiff