+#define PERL_NO_GET_CONTEXT
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
/* Magic signature for Thread's mg_private is "Th" */
#define Thread_MAGIC_SIGNATURE 0x5468
-static U32 threadnum = 0;
+#ifdef __cplusplus
+#ifdef I_UNISTD
+#include <unistd.h>
+#endif
+#endif
+#include <fcntl.h>
+
static int sig_pipe[2];
+
+#ifndef THREAD_RET_TYPE
+#define THREAD_RET_TYPE void *
+#define THREAD_RET_CAST(x) ((THREAD_RET_TYPE) x)
+#endif
static void
-remove_thread(t)
-Thread t;
+remove_thread(pTHX_ Thread t)
{
- DEBUG_L(WITH_THR(PerlIO_printf(PerlIO_stderr(),
- "%p: remove_thread %p\n", thr, t)));
- MUTEX_LOCK(&threads_mutex);
- MUTEX_DESTROY(&t->mutex);
- nthreads--;
- t->prev->next = t->next;
- t->next->prev = t->prev;
- COND_BROADCAST(&nthreads_cond);
- MUTEX_UNLOCK(&threads_mutex);
}
static THREAD_RET_TYPE
-threadstart(arg)
-void *arg;
+threadstart(void *arg)
{
-#ifdef FAKE_THREADS
- Thread savethread = thr;
- LOGOP myop;
- dSP;
- I32 oldscope = scopestack_ix;
- I32 retval;
- AV *returnav;
- int i;
-
- DEBUG_L(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 */
- op = (OP*)&myop;
- Zero(op, 1, LOGOP);
- myop.op_flags = OPf_STACKED;
- myop.op_next = Nullop;
- myop.op_flags |= OPf_KNOW;
- myop.op_flags |= OPf_WANT_LIST;
- op = pp_entersub(ARGS);
- DEBUG_L(if (!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;
- dSP;
- I32 oldmark = TOPMARK;
- I32 oldscope = scopestack_ix;
- I32 retval;
- AV *returnav;
- int i, ret;
- dJMPENV;
-
- /* Don't call *anything* requiring dTHR until after pthread_setspecific */
- /*
- * 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 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_L(PerlIO_printf(PerlIO_stderr(), "new thread %p starting at %s\n",
- thr, SvPEEK(TOPs)));
-
- JMPENV_PUSH(ret);
- switch (ret) {
- case 3:
- PerlIO_printf(PerlIO_stderr(), "panic: threadstart\n");
- /* fall through */
- case 1:
- STATUS_ALL_FAILURE;
- /* fall through */
- case 2:
- /* my_exit() was called */
- while (scopestack_ix > oldscope)
- LEAVE;
- JMPENV_POP;
- av_store(returnav, 0, newSViv(statusvalue));
- goto finishoff;
- }
-
- CATCH_SET(TRUE);
-
- /* Now duplicate most of perl_call_sv but with a few twists */
- op = (OP*)&myop;
- Zero(op, 1, LOGOP);
- myop.op_flags = OPf_STACKED;
- myop.op_next = Nullop;
- myop.op_flags |= OPf_KNOW;
- myop.op_flags |= OPf_WANT_LIST;
- op = pp_entersub(ARGS);
- if (op)
- runops();
- SPAGAIN;
- retval = sp - (stack_base + oldmark);
- sp = stack_base + oldmark + 1;
- DEBUG_L(for (i = 1; i <= retval; i++)
- PerlIO_printf(PerlIO_stderr(),
- "%p returnav[%d] = %s\n",
- thr, i, SvPEEK(sp[i - 1]));)
- returnav = newAV();
- av_store(returnav, 0, newSVpv("", 0));
- for (i = 1; i <= retval; i++, sp++)
- sv_setsv(*av_fetch(returnav, i, TRUE), SvREFCNT_inc(*sp));
-
- finishoff:
-#if 0
- /* removed for debug */
- SvREFCNT_dec(curstack);
-#endif
- SvREFCNT_dec(thr->cvcache);
- SvREFCNT_dec(thr->magicals);
- SvREFCNT_dec(thr->specific);
- Safefree(markstack);
- Safefree(scopestack);
- Safefree(savestack);
- Safefree(retstack);
- Safefree(cxstack);
- Safefree(tmps_stack);
- Safefree(ofs);
-
- MUTEX_LOCK(&thr->mutex);
- DEBUG_L(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_L(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_L(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(returnav);
- DEBUG_L(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(returnav); /* Available for anyone to join with */
- /* us unless we're detached, in which */
- /* case noone sees the value anyway. */
-#endif
+ return THREAD_RET_CAST(NULL);
}
static SV *
-newthread(startsv, initargs, class)
-SV *startsv;
-AV *initargs;
-char *class;
+newthread (pTHX_ SV *startsv, AV *initargs, char *classname)
{
- dTHR;
- dSP;
- Thread savethread;
- int i;
- SV *sv;
- int err;
-#ifndef THREAD_CREATE
- sigset_t fullmask, oldmask;
-#endif
-
- savethread = thr;
- thr = new_struct_thread(thr);
- SPAGAIN;
- DEBUG_L(PerlIO_printf(PerlIO_stderr(),
- "%p: newthread, tid is %u, preparing stack\n",
- savethread, 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;
-
-#ifdef THREAD_CREATE
- THREAD_CREATE(thr, threadstart);
-#else
- /* On your marks... */
- MUTEX_LOCK(&thr->mutex);
- /* Get set... */
- sigfillset(&fullmask);
- if (sigprocmask(SIG_SETMASK, &fullmask, &oldmask) == -1)
- croak("panic: sigprocmask");
- err = pthread_create(&thr->self, pthread_attr_default,
- threadstart, (void*) thr);
- /* Go */
- MUTEX_UNLOCK(&thr->mutex);
-#endif
- if (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");
+ croak("This perl was not built with support for 5.005-style threads.\n"
+ "Run \"perldoc Thread\" for more information");
#endif
- sv = newSViv(thr->tid);
- sv_magic(sv, thr->oursv, '~', 0, 0);
- SvMAGIC(sv)->mg_private = Thread_MAGIC_SIGNATURE;
- return sv_bless(newRV_noinc(sv), gv_stashpv(class, TRUE));
+ return &PL_sv_undef;
}
+static Signal_t handle_thread_signal (int sig);
+
static Signal_t
-handle_thread_signal(sig)
-int sig;
+handle_thread_signal(int sig)
{
- char c = (char) sig;
- write(sig_pipe[0], &c, 1);
+ 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(Perl_debug_log,
+ "handle_thread_signal: got signal %d\n", sig));
+ write(sig_pipe[1], &c, 1);
}
MODULE = Thread PACKAGE = Thread
+PROTOTYPES: DISABLE
void
-new(class, startsv, ...)
- char * class
+new(classname, startsv, ...)
+ char * classname
SV * startsv
AV * av = av_make(items - 2, &ST(2));
PPCODE:
- XPUSHs(sv_2mortal(newthread(startsv, av, class)));
+ XPUSHs(sv_2mortal(newthread(aTHX_ startsv, av, classname)));
void
join(t)
AV * av = NO_INIT
int i = NO_INIT
PPCODE:
- DEBUG_L(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);
-
- /* Could easily speed up the following if necessary */
- for (i = 0; i <= AvFILL(av); i++)
- XPUSHs(sv_2mortal(*av_fetch(av, i, FALSE)));
void
detach(t)
Thread t
CODE:
- DEBUG_L(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 */
- }
void
equal(t1, t2)
Thread t1
Thread t2
PPCODE:
- PUSHs((t1 == t2) ? &sv_yes : &sv_no);
+ PUSHs((t1 == t2) ? &PL_sv_yes : &PL_sv_no);
void
flags(t)
Thread t
PPCODE:
- PUSHs(sv_2mortal(newSViv(t->flags)));
void
-self(class)
- char * class
+done(t)
+ Thread t
+ PPCODE:
+
+void
+self(classname)
+ char * classname
PREINIT:
SV *sv;
- PPCODE:
- 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(class, TRUE))));
+ PPCODE:
U32
tid(t)
Thread t
CODE:
- MUTEX_LOCK(&t->mutex);
- RETVAL = t->tid;
- MUTEX_UNLOCK(&t->mutex);
+ RETVAL = 0;
OUTPUT:
RETVAL
DESTROY(t)
SV * t
PPCODE:
- PUSHs(&sv_yes);
+ PUSHs(t ? &PL_sv_yes : &PL_sv_no);
void
yield()
CODE:
- YIELD;
void
cond_wait(sv)
SV * sv
- MAGIC * mg = NO_INIT
-CODE:
- if (SvROK(sv))
- sv = SvRV(sv);
+CODE:
- mg = condpair_magic(sv);
- DEBUG_L(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_WAIT(MgCONDP(mg), MgMUTEXP(mg));
- while (MgOWNER(mg))
- COND_WAIT(MgOWNERCONDP(mg), MgMUTEXP(mg));
- MgOWNER(mg) = thr;
- MUTEX_UNLOCK(MgMUTEXP(mg));
-
void
cond_signal(sv)
SV * sv
- MAGIC * mg = NO_INIT
CODE:
- if (SvROK(sv))
- sv = SvRV(sv);
-
- mg = condpair_magic(sv);
- DEBUG_L(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));
void
cond_broadcast(sv)
SV * sv
- MAGIC * mg = NO_INIT
-CODE:
- if (SvROK(sv))
- sv = SvRV(sv);
-
- mg = condpair_magic(sv);
- DEBUG_L(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));
+CODE:
void
-list(class)
- char * class
- PREINIT:
- Thread t;
- AV * av;
- SV ** svp;
- int n = 0;
+list(classname)
+ char * classname
PPCODE:
- 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(&threads_mutex);
- do {
- n = nthreads;
- MUTEX_UNLOCK(&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(class, TRUE)));
-
- }
- }
- MUTEX_LOCK(&threads_mutex);
- } while (n < nthreads);
- n = 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(&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);
MODULE = Thread PACKAGE = Thread::Signal
void
kill_sighandler_thread()
PPCODE:
- write(sig_pipe[0], "\0", 1);
- PUSHs(&sv_yes);
+ write(sig_pipe[1], "\0", 1);
+ PUSHs(&PL_sv_yes);
void
init_thread_signals()
PPCODE:
- sighandlerp = handle_thread_signal;
+ PL_sighandlerp = handle_thread_signal;
if (pipe(sig_pipe) == -1)
XSRETURN_UNDEF;
- PUSHs(&sv_yes);
+ PUSHs(&PL_sv_yes);
-SV *
+void
await_signal()
PREINIT:
- char c;
+ unsigned char c;
SSize_t ret;
CODE:
do {
- ret = read(sig_pipe[1], &c, 1);
+ ret = read(sig_pipe[0], &c, 1);
} while (ret == -1 && errno == EINTR);
if (ret == -1)
croak("panic: await_signal");
- if (ret == 0)
- XSRETURN_UNDEF;
- RETVAL = c ? psig_ptr[c] : &sv_no;
- OUTPUT:
- RETVAL
+ ST(0) = sv_newmortal();
+ if (ret)
+ sv_setsv(ST(0), c ? PL_psig_ptr[c] : &PL_sv_no);
+ DEBUG_S(PerlIO_printf(Perl_debug_log,
+ "await_signal returning %s\n", SvPEEK(ST(0))));
+
+MODULE = Thread PACKAGE = Thread::Specific
+
+void
+data(classname = "Thread::Specific")
+ char * classname
+ PPCODE: