1 #define PERL_NO_GET_CONTEXT
5 /* Workaround for XSUB.h bug under WIN32 */
8 # if !defined(__BORLANDC__)
9 # define setjmp(x) _setjmp(x)
13 # define NEED_PL_signals
14 # define NEED_newRV_noinc
15 # define NEED_sv_2pv_nolen
24 /* Supposed to be in Winbase.h */
25 # ifndef STACK_SIZE_PARAM_IS_A_RESERVATION
26 # define STACK_SIZE_PARAM_IS_A_RESERVATION 0x00010000
28 # include <win32thread.h>
31 typedef perl_os_thread pthread_t;
36 # define PERL_THREAD_SETSPECIFIC(k,v) pthread_setspecific(k,v)
37 # ifdef OLD_PTHREADS_API
38 # define PERL_THREAD_DETACH(t) pthread_detach(&(t))
40 # define PERL_THREAD_DETACH(t) pthread_detach((t))
43 #if !defined(HAS_GETPAGESIZE) && defined(I_SYS_PARAM)
44 # include <sys/param.h>
47 /* Values for 'state' member */
48 #define PERL_ITHR_JOINABLE 0
49 #define PERL_ITHR_DETACHED 1
50 #define PERL_ITHR_JOINED 2
51 #define PERL_ITHR_FINISHED 4
52 #define PERL_ITHR_THREAD_EXIT_ONLY 8
54 typedef struct _ithread {
55 struct _ithread *next; /* Next thread in the list */
56 struct _ithread *prev; /* Prev thread in the list */
57 PerlInterpreter *interp; /* The threads interpreter */
58 UV tid; /* Threads module's thread id */
59 perl_mutex mutex; /* Mutex for updating things in this struct */
60 int count; /* How many SVs have a reference to us */
61 int state; /* Detached, joined, finished, etc. */
62 int gimme; /* Context of create */
63 SV *init_function; /* Code to run */
64 SV *params; /* Args to pass function */
66 DWORD thr; /* OS's idea if thread id */
67 HANDLE handle; /* OS's waitable handle */
69 pthread_t thr; /* OS's handle for the thread */
75 #define MY_CXT_KEY "threads::_cxt" XS_VERSION
78 /* Used by Perl interpreter for thread context switching */
85 #define MY_POOL_KEY "threads::_pool" XS_VERSION
88 /* Structure for 'main' thread
89 * Also forms the 'base' for the doubly-linked list of threads */
92 /* Protects the creation and destruction of threads*/
93 perl_mutex create_destruct_mutex;
99 IV default_stack_size;
104 SV *my_pool_sv = *hv_fetch(PL_modglobal, MY_POOL_KEY, \
105 sizeof(MY_POOL_KEY)-1, TRUE); \
106 my_pool_t *my_poolp = INT2PTR(my_pool_t*, SvUV(my_pool_sv))
108 #define MY_POOL (*my_poolp)
111 /* Used by Perl interpreter for thread context switching */
113 S_ithread_set(pTHX_ ithread *thread)
116 MY_CXT.context = thread;
123 return (MY_CXT.context);
127 /* Free any data (such as the Perl interpreter) attached to an ithread
128 * structure. This is a bit like undef on SVs, where the SV isn't freed,
129 * but the PVX is. Must be called with thread->mutex already held.
132 S_ithread_clear(pTHX_ ithread *thread)
134 PerlInterpreter *interp;
136 assert((thread->state & PERL_ITHR_FINISHED) &&
137 (thread->state & (PERL_ITHR_DETACHED|PERL_ITHR_JOINED)));
139 interp = thread->interp;
143 PERL_SET_CONTEXT(interp);
144 S_ithread_set(aTHX_ thread);
146 SvREFCNT_dec(thread->params);
147 thread->params = Nullsv;
149 perl_destruct(interp);
151 thread->interp = NULL;
154 PERL_SET_CONTEXT(aTHX);
158 /* Free an ithread structure and any attached data if its count == 0 */
160 S_ithread_destruct(pTHX_ ithread *thread)
167 /* Return if thread is still being used */
168 if (thread->count != 0) {
172 /* Main thread (0) is immortal and should never get here */
173 assert(thread->tid != 0);
175 /* Remove from circular list of threads */
176 MUTEX_LOCK(&MY_POOL.create_destruct_mutex);
177 if ((! thread->next || ! thread->prev) && ckWARN_d(WARN_INTERNAL)) {
178 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
179 "Inconsistency in internal threads list found "
180 "during destruction of thread %" UVuf, thread->tid);
182 if (thread->next) thread->next->prev = thread->prev;
183 if (thread->prev) thread->prev->next = thread->next;
186 MUTEX_UNLOCK(&MY_POOL.create_destruct_mutex);
188 /* Thread is now disowned */
189 MUTEX_LOCK(&thread->mutex);
190 S_ithread_clear(aTHX_ thread);
193 handle = thread->handle;
194 thread->handle = NULL;
196 MUTEX_UNLOCK(&thread->mutex);
197 MUTEX_DESTROY(&thread->mutex);
205 /* Call PerlMemShared_free() in the context of the "first" interpreter
206 * per http://www.nntp.perl.org/group/perl.perl5.porters/110772
208 aTHX = MY_POOL.main_thread.interp;
209 PerlMemShared_free(thread);
213 /* Warn if exiting with any unjoined threads */
221 MUTEX_LOCK(&MY_POOL.create_destruct_mutex);
222 veto_cleanup = (MY_POOL.running_threads || MY_POOL.joinable_threads);
223 MUTEX_UNLOCK(&MY_POOL.create_destruct_mutex);
226 if (ckWARN_d(WARN_THREADS)) {
227 Perl_warn(aTHX_ "Perl exited with active threads:\n\t%"
228 IVdf " running and unjoined\n\t%"
229 IVdf " finished and unjoined\n\t%"
230 IVdf " running and detached\n",
231 MY_POOL.running_threads,
232 MY_POOL.joinable_threads,
233 MY_POOL.detached_threads);
237 return (veto_cleanup);
240 /* Called on exit from main thread */
242 Perl_ithread_hook(pTHX)
245 return ((aTHX == MY_POOL.main_thread.interp) ? S_exit_warning(aTHX) : 0);
249 /* MAGIC (in mg.h sense) hooks */
252 ithread_mg_get(pTHX_ SV *sv, MAGIC *mg)
254 ithread *thread = (ithread *)mg->mg_ptr;
255 SvIV_set(sv, PTR2IV(thread));
261 ithread_mg_free(pTHX_ SV *sv, MAGIC *mg)
263 ithread *thread = (ithread *)mg->mg_ptr;
266 MUTEX_LOCK(&thread->mutex);
267 cleanup = ((--thread->count == 0) &&
268 (thread->state & PERL_ITHR_FINISHED) &&
269 (thread->state & (PERL_ITHR_DETACHED|PERL_ITHR_JOINED)));
270 MUTEX_UNLOCK(&thread->mutex);
273 S_ithread_destruct(aTHX_ thread);
279 ithread_mg_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *param)
281 ithread *thread = (ithread *)mg->mg_ptr;
282 MUTEX_LOCK(&thread->mutex);
284 MUTEX_UNLOCK(&thread->mutex);
288 MGVTBL ithread_vtbl = {
289 ithread_mg_get, /* get */
293 ithread_mg_free, /* free */
295 ithread_mg_dup /* dup */
299 /* Provided default, minimum and rational stack sizes */
301 S_good_stack_size(pTHX_ IV stack_size)
305 /* Use default stack size if no stack size specified */
307 return (MY_POOL.default_stack_size);
310 #ifdef PTHREAD_STACK_MIN
311 /* Can't use less than minimum */
312 if (stack_size < PTHREAD_STACK_MIN) {
313 if (ckWARN(WARN_THREADS)) {
314 Perl_warn(aTHX_ "Using minimum thread stack size of %" IVdf, (IV)PTHREAD_STACK_MIN);
316 return (PTHREAD_STACK_MIN);
320 /* Round up to page size boundary */
321 if (MY_POOL.page_size <= 0) {
322 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
323 SETERRNO(0, SS_NORMAL);
325 MY_POOL.page_size = sysconf(_SC_PAGESIZE);
327 MY_POOL.page_size = sysconf(_SC_MMAP_PAGE_SIZE);
329 if ((long)MY_POOL.page_size < 0) {
331 SV * const error = get_sv("@", FALSE);
332 (void)SvUPGRADE(error, SVt_PV);
333 Perl_croak(aTHX_ "PANIC: sysconf: %s", SvPV_nolen(error));
335 Perl_croak(aTHX_ "PANIC: sysconf: pagesize unknown");
339 # ifdef HAS_GETPAGESIZE
340 MY_POOL.page_size = getpagesize();
342 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
343 MY_POOL.page_size = PAGESIZE;
345 MY_POOL.page_size = 8192; /* A conservative default */
348 if (MY_POOL.page_size <= 0) {
349 Perl_croak(aTHX_ "PANIC: bad pagesize %" IVdf, (IV)MY_POOL.page_size);
353 stack_size = ((stack_size + (MY_POOL.page_size - 1)) / MY_POOL.page_size) * MY_POOL.page_size;
359 /* Starts executing the thread.
360 * Passed as the C level function to run in the new thread.
363 STATIC THREAD_RET_TYPE
364 S_ithread_run(LPVOID arg)
367 S_ithread_run(void * arg)
370 ithread *thread = (ithread *)arg;
379 dTHXa(thread->interp);
383 /* Blocked until ->create() call finishes */
384 MUTEX_LOCK(&thread->mutex);
385 MUTEX_UNLOCK(&thread->mutex);
387 PERL_SET_CONTEXT(thread->interp);
388 S_ithread_set(aTHX_ thread);
390 PL_perl_destruct_level = 2;
393 AV *params = (AV *)SvRV(thread->params);
394 int len = (int)av_len(params)+1;
401 /* Put args on the stack */
403 for (ii=0; ii < len; ii++) {
404 XPUSHs(av_shift(params));
408 oldscope = PL_scopestack_ix;
411 /* Run the specified function */
412 len = (int)call_sv(thread->init_function, thread->gimme|G_EVAL);
413 } else if (jmp_rc == 2) {
416 exit_code = STATUS_CURRENT;
417 while (PL_scopestack_ix > oldscope) {
423 /* Remove args from stack and put back in params array */
425 for (ii=len-1; ii >= 0; ii--) {
428 av_store(params, ii, SvREFCNT_inc(sv));
435 /* Check for failure */
436 if (SvTRUE(ERRSV) && ckWARN_d(WARN_THREADS)) {
437 oldscope = PL_scopestack_ix;
440 /* Warn that thread died */
441 Perl_warn(aTHX_ "Thread %" UVuf " terminated abnormally: %" SVf, thread->tid, ERRSV);
442 } else if (jmp_rc == 2) {
443 /* Warn handler exited */
445 exit_code = STATUS_CURRENT;
446 while (PL_scopestack_ix > oldscope) {
453 /* Release function ref */
454 SvREFCNT_dec(thread->init_function);
455 thread->init_function = Nullsv;
458 PerlIO_flush((PerlIO *)NULL);
460 MUTEX_LOCK(&MY_POOL.create_destruct_mutex);
461 MUTEX_LOCK(&thread->mutex);
462 /* Mark as finished */
463 thread->state |= PERL_ITHR_FINISHED;
464 /* Clear exit flag if required */
465 if (thread->state & PERL_ITHR_THREAD_EXIT_ONLY) {
468 /* Cleanup if detached */
469 cleanup = (thread->state & PERL_ITHR_DETACHED);
470 MUTEX_UNLOCK(&thread->mutex);
472 /* Adjust thread status counts */
474 MY_POOL.detached_threads--;
476 MY_POOL.running_threads--;
477 MY_POOL.joinable_threads++;
479 MUTEX_UNLOCK(&MY_POOL.create_destruct_mutex);
481 /* Exit application if required */
483 oldscope = PL_scopestack_ix;
486 /* Warn if there are unjoined threads */
487 S_exit_warning(aTHX);
488 } else if (jmp_rc == 2) {
489 /* Warn handler exited */
490 exit_code = STATUS_CURRENT;
491 while (PL_scopestack_ix > oldscope) {
500 /* Clean up detached thread */
502 S_ithread_destruct(aTHX_ thread);
513 /* Type conversion helper functions */
516 S_ithread_to_SV(pTHX_ SV *obj, ithread *thread, char *classname, bool inc)
521 /* If incrementing thread ref count, then call within mutex lock */
523 MUTEX_LOCK(&thread->mutex);
525 MUTEX_UNLOCK(&thread->mutex);
532 sv = newSVrv(obj, classname);
533 sv_setiv(sv, PTR2IV(thread));
534 mg = sv_magicext(sv, Nullsv, PERL_MAGIC_shared_scalar, &ithread_vtbl, (char *)thread, 0);
535 mg->mg_flags |= MGf_DUP;
542 S_SV_to_ithread(pTHX_ SV *sv)
544 /* Argument is a thread */
546 return (INT2PTR(ithread *, SvIV(SvRV(sv))));
548 /* Argument is classname, therefore return current thread */
549 return (S_ithread_get(aTHX));
554 * Called in context of parent thread.
555 * Called with MY_POOL.create_destruct_mutex locked. (Unlocked on error.)
559 pTHX_ SV *init_function,
568 CLONE_PARAMS clone_param;
569 ithread *current_thread = S_ithread_get(aTHX);
571 SV **tmps_tmp = PL_tmps_stack;
572 IV tmps_ix = PL_tmps_ix;
574 int rc_stack_size = 0;
575 int rc_thread_create = 0;
578 /* Allocate thread structure in context of the main threads interpreter */
580 PERL_SET_CONTEXT(MY_POOL.main_thread.interp);
581 thread = (ithread *)PerlMemShared_malloc(sizeof(ithread));
583 PERL_SET_CONTEXT(aTHX);
585 MUTEX_UNLOCK(&MY_POOL.create_destruct_mutex);
586 PerlLIO_write(PerlIO_fileno(Perl_error_log), PL_no_mem, strlen(PL_no_mem));
589 Zero(thread, 1, ithread);
591 /* Add to threads list */
592 thread->next = &MY_POOL.main_thread;
593 thread->prev = MY_POOL.main_thread.prev;
594 MY_POOL.main_thread.prev = thread;
595 thread->prev->next = thread;
597 /* Set count to 1 immediately in case thread exits before
598 * we return to caller!
602 /* Block new thread until ->create() call finishes */
603 MUTEX_INIT(&thread->mutex);
604 MUTEX_LOCK(&thread->mutex);
606 thread->tid = MY_POOL.tid_counter++;
607 thread->stack_size = S_good_stack_size(aTHX_ stack_size);
608 thread->gimme = gimme;
609 thread->state = exit_opt;
611 /* "Clone" our interpreter into the thread's interpreter.
612 * This gives thread access to "static data" and code.
614 PerlIO_flush((PerlIO *)NULL);
615 S_ithread_set(aTHX_ thread);
617 SAVEBOOL(PL_srand_called); /* Save this so it becomes the correct value */
618 PL_srand_called = FALSE; /* Set it to false so we can detect if it gets
619 set during the clone */
622 thread->interp = perl_clone(aTHX, CLONEf_KEEP_PTR_TABLE | CLONEf_CLONE_HOST);
624 thread->interp = perl_clone(aTHX, CLONEf_KEEP_PTR_TABLE);
627 /* perl_clone() leaves us in new interpreter's context. As it is tricky
628 * to spot an implicit aTHX, create a new scope with aTHX matching the
629 * context for the duration of our work for new interpreter.
632 dTHXa(thread->interp);
636 /* Here we remove END blocks since they should only run in the thread
639 SvREFCNT_dec(PL_endav);
642 if (SvPOK(init_function)) {
643 thread->init_function = newSV(0);
644 sv_copypv(thread->init_function, init_function);
646 clone_param.flags = 0;
647 thread->init_function = sv_dup(init_function, &clone_param);
648 if (SvREFCNT(thread->init_function) == 0) {
649 SvREFCNT_inc_void(thread->init_function);
653 thread->params = sv_dup(params, &clone_param);
654 SvREFCNT_inc_void(thread->params);
656 /* The code below checks that anything living on the tmps stack and
657 * has been cloned (so it lives in the ptr_table) has a refcount
660 * If the refcount is 0 it means that a something on the stack/context
661 * was holding a reference to it and since we init_stacks() in
662 * perl_clone that won't get cleaned and we will get a leaked scalar.
663 * The reason it was cloned was that it lived on the @_ stack.
665 * Example of this can be found in bugreport 15837 where calls in the
666 * parameter list end up as a temp.
668 * One could argue that this fix should be in perl_clone.
670 while (tmps_ix > 0) {
671 SV* sv = (SV*)ptr_table_fetch(PL_ptr_table, tmps_tmp[tmps_ix]);
673 if (sv && SvREFCNT(sv) == 0) {
674 SvREFCNT_inc_void(sv);
679 SvTEMP_off(thread->init_function);
680 ptr_table_free(PL_ptr_table);
682 PL_exit_flags |= PERL_EXIT_DESTRUCT_END;
684 S_ithread_set(aTHX_ current_thread);
685 PERL_SET_CONTEXT(aTHX);
687 /* Create/start the thread */
689 thread->handle = CreateThread(NULL,
690 (DWORD)thread->stack_size,
693 STACK_SIZE_PARAM_IS_A_RESERVATION,
697 STATIC pthread_attr_t attr;
698 STATIC int attr_inited = 0;
699 STATIC int attr_joinable = PTHREAD_CREATE_JOINABLE;
701 pthread_attr_init(&attr);
705 # ifdef PTHREAD_ATTR_SETDETACHSTATE
706 /* Threads start out joinable */
707 PTHREAD_ATTR_SETDETACHSTATE(&attr, attr_joinable);
710 # ifdef _POSIX_THREAD_ATTR_STACKSIZE
711 /* Set thread's stack size */
712 if (thread->stack_size > 0) {
713 rc_stack_size = pthread_attr_setstacksize(&attr, (size_t)thread->stack_size);
717 /* Create the thread */
718 if (! rc_stack_size) {
719 # ifdef OLD_PTHREADS_API
720 rc_thread_create = pthread_create(&thread->thr,
725 # if defined(HAS_PTHREAD_ATTR_SETSCOPE) && defined(PTHREAD_SCOPE_SYSTEM)
726 pthread_attr_setscope(&attr, PTHREAD_SCOPE_SYSTEM);
728 rc_thread_create = pthread_create(&thread->thr,
735 # ifdef _POSIX_THREAD_ATTR_STACKSIZE
736 /* Try to get thread's actual stack size */
740 stacksize = pthread_attr_getstacksize(attr);
742 if (! pthread_attr_getstacksize(&attr, &stacksize))
745 thread->stack_size = (IV)stacksize;
752 /* Check for errors */
754 if (thread->handle == NULL) {
756 if (rc_stack_size || rc_thread_create) {
758 /* Must unlock mutex for destruct call */
759 MUTEX_UNLOCK(&MY_POOL.create_destruct_mutex);
761 S_ithread_destruct(aTHX_ thread);
763 if (ckWARN_d(WARN_THREADS)) {
765 Perl_warn(aTHX_ "Thread creation failed: pthread_attr_setstacksize(%" IVdf ") returned %d", thread->stack_size, rc_stack_size);
767 Perl_warn(aTHX_ "Thread creation failed: pthread_create returned %d", rc_thread_create);
774 MY_POOL.running_threads++;
779 #endif /* USE_ITHREADS */
782 MODULE = threads PACKAGE = threads PREFIX = ithread_
792 SV *function_to_call;
798 SV *thread_exit_only;
804 if ((items >= 2) && SvROK(ST(1)) && SvTYPE(SvRV(ST(1)))==SVt_PVHV) {
806 Perl_croak(aTHX_ "Usage: threads->create(\\%specs, function, ...)");
808 specs = (HV*)SvRV(ST(1));
812 Perl_croak(aTHX_ "Usage: threads->create(function, ...)");
818 if (sv_isobject(ST(0))) {
820 classname = HvNAME(SvSTASH(SvRV(ST(0))));
821 thread = INT2PTR(ithread *, SvIV(SvRV(ST(0))));
822 stack_size = thread->stack_size;
823 exit_opt = thread->state & PERL_ITHR_THREAD_EXIT_ONLY;
825 /* threads->create() */
826 classname = (char *)SvPV_nolen(ST(0));
827 stack_size = MY_POOL.default_stack_size;
828 thread_exit_only = get_sv("threads::thread_exit_only", TRUE);
829 exit_opt = (SvTRUE(thread_exit_only))
830 ? PERL_ITHR_THREAD_EXIT_ONLY : 0;
833 function_to_call = ST(idx+1);
838 if (hv_exists(specs, "stack", 5)) {
839 stack_size = SvIV(*hv_fetch(specs, "stack", 5, 0));
840 } else if (hv_exists(specs, "stacksize", 9)) {
841 stack_size = SvIV(*hv_fetch(specs, "stacksize", 9, 0));
842 } else if (hv_exists(specs, "stack_size", 10)) {
843 stack_size = SvIV(*hv_fetch(specs, "stack_size", 10, 0));
847 if (hv_exists(specs, "context", 7)) {
848 str = (char *)SvPV_nolen(*hv_fetch(specs, "context", 7, 0));
863 Perl_croak(aTHX_ "Invalid context: %s", str);
865 } else if (hv_exists(specs, "array", 5)) {
866 if (SvTRUE(*hv_fetch(specs, "array", 5, 0))) {
869 } else if (hv_exists(specs, "scalar", 6)) {
870 if (SvTRUE(*hv_fetch(specs, "scalar", 6, 0))) {
873 } else if (hv_exists(specs, "void", 4)) {
874 if (SvTRUE(*hv_fetch(specs, "void", 4, 0))) {
879 /* exit => thread_only */
880 if (hv_exists(specs, "exit", 4)) {
881 str = (char *)SvPV_nolen(*hv_fetch(specs, "exit", 4, 0));
882 exit_opt = (*str == 't' || *str == 'T')
883 ? PERL_ITHR_THREAD_EXIT_ONLY : 0;
887 context = GIMME_V; /* Implicit context */
889 context |= (GIMME_V & (~(G_ARRAY|G_SCALAR|G_VOID)));
895 for (ii=2; ii < items ; ii++) {
896 av_push(params, SvREFCNT_inc(ST(idx+ii)));
901 MUTEX_LOCK(&MY_POOL.create_destruct_mutex);
902 thread = S_ithread_create(aTHX_ function_to_call,
906 newRV_noinc((SV*)params));
908 XSRETURN_UNDEF; /* Mutex already unlocked */
910 ST(0) = sv_2mortal(S_ithread_to_SV(aTHX_ Nullsv, thread, classname, FALSE));
913 MUTEX_UNLOCK(&thread->mutex);
914 MUTEX_UNLOCK(&MY_POOL.create_destruct_mutex);
916 /* XSRETURN(1); - implied */
929 /* Class method only */
931 Perl_croak(aTHX_ "Usage: threads->list(...)");
933 classname = (char *)SvPV_nolen(ST(0));
935 /* Calling context */
936 list_context = (GIMME_V == G_ARRAY);
938 /* Running or joinable parameter */
940 want_running = SvTRUE(ST(1));
943 /* Walk through threads list */
944 MUTEX_LOCK(&MY_POOL.create_destruct_mutex);
945 for (thread = MY_POOL.main_thread.next;
946 thread != &MY_POOL.main_thread;
947 thread = thread->next)
949 /* Ignore detached or joined threads */
950 if (thread->state & (PERL_ITHR_DETACHED|PERL_ITHR_JOINED)) {
954 /* Filter per parameter */
957 if (thread->state & PERL_ITHR_FINISHED) {
958 continue; /* Not running */
961 if (! (thread->state & PERL_ITHR_FINISHED)) {
962 continue; /* Still running - not joinable yet */
967 /* Push object on stack if list context */
969 XPUSHs(sv_2mortal(S_ithread_to_SV(aTHX_ Nullsv, thread, classname, TRUE)));
973 MUTEX_UNLOCK(&MY_POOL.create_destruct_mutex);
974 /* If scalar context, send back count */
975 if (! list_context) {
986 /* Class method only */
988 Perl_croak(aTHX_ "Usage: threads->self()");
990 classname = (char *)SvPV_nolen(ST(0));
992 thread = S_ithread_get(aTHX);
994 ST(0) = sv_2mortal(S_ithread_to_SV(aTHX_ Nullsv, thread, classname, TRUE));
995 /* XSRETURN(1); - implied */
1003 thread = S_SV_to_ithread(aTHX_ ST(0));
1004 XST_mUV(0, thread->tid);
1005 /* XSRETURN(1); - implied */
1023 /* Object method only */
1024 if (! sv_isobject(ST(0))) {
1025 Perl_croak(aTHX_ "Usage: $thr->join()");
1028 /* Check if the thread is joinable */
1029 thread = S_SV_to_ithread(aTHX_ ST(0));
1030 join_err = (thread->state & (PERL_ITHR_DETACHED|PERL_ITHR_JOINED));
1032 if (join_err & PERL_ITHR_DETACHED) {
1033 Perl_croak(aTHX_ "Cannot join a detached thread");
1035 Perl_croak(aTHX_ "Thread already joined");
1039 /* Join the thread */
1041 waitcode = WaitForSingleObject(thread->handle, INFINITE);
1043 pthread_join(thread->thr, &retval);
1046 MUTEX_LOCK(&thread->mutex);
1047 /* Mark as joined */
1048 thread->state |= PERL_ITHR_JOINED;
1050 /* Get the return value from the call_sv */
1053 PerlInterpreter *other_perl;
1054 CLONE_PARAMS clone_params;
1055 ithread *current_thread;
1057 params_copy = (AV *)SvRV(thread->params);
1058 other_perl = thread->interp;
1059 clone_params.stashes = newAV();
1060 clone_params.flags = CLONEf_JOIN_IN;
1061 PL_ptr_table = ptr_table_new();
1062 current_thread = S_ithread_get(aTHX);
1063 S_ithread_set(aTHX_ thread);
1064 /* Ensure 'meaningful' addresses retain their meaning */
1065 ptr_table_store(PL_ptr_table, &other_perl->Isv_undef, &PL_sv_undef);
1066 ptr_table_store(PL_ptr_table, &other_perl->Isv_no, &PL_sv_no);
1067 ptr_table_store(PL_ptr_table, &other_perl->Isv_yes, &PL_sv_yes);
1068 params = (AV *)sv_dup((SV*)params_copy, &clone_params);
1069 S_ithread_set(aTHX_ current_thread);
1070 SvREFCNT_dec(clone_params.stashes);
1071 SvREFCNT_inc_void(params);
1072 ptr_table_free(PL_ptr_table);
1073 PL_ptr_table = NULL;
1076 /* We are finished with the thread */
1077 S_ithread_clear(aTHX_ thread);
1078 MUTEX_UNLOCK(&thread->mutex);
1080 MUTEX_LOCK(&MY_POOL.create_destruct_mutex);
1081 if (! (thread->state & PERL_ITHR_DETACHED)) {
1082 MY_POOL.joinable_threads--;
1084 MUTEX_UNLOCK(&MY_POOL.create_destruct_mutex);
1086 /* If no return values, then just return */
1091 /* Put return values on stack */
1092 len = (int)AvFILL(params);
1093 for (ii=0; ii <= len; ii++) {
1094 SV* param = av_shift(params);
1095 XPUSHs(sv_2mortal(param));
1098 /* Free return value array */
1099 SvREFCNT_dec(params);
1116 /* Check if the thread is detachable */
1117 thread = S_SV_to_ithread(aTHX_ ST(0));
1118 if ((detach_err = (thread->state & (PERL_ITHR_DETACHED|PERL_ITHR_JOINED)))) {
1119 if (detach_err & PERL_ITHR_DETACHED) {
1120 Perl_croak(aTHX_ "Thread already detached");
1122 Perl_croak(aTHX_ "Cannot detach a joined thread");
1126 /* Detach the thread */
1127 MUTEX_LOCK(&MY_POOL.create_destruct_mutex);
1128 MUTEX_LOCK(&thread->mutex);
1129 thread->state |= PERL_ITHR_DETACHED;
1131 /* Windows has no 'detach thread' function */
1133 PERL_THREAD_DETACH(thread->thr);
1135 /* Cleanup if finished */
1136 cleanup = (thread->state & PERL_ITHR_FINISHED);
1137 MUTEX_UNLOCK(&thread->mutex);
1140 MY_POOL.joinable_threads--;
1142 MY_POOL.running_threads--;
1143 MY_POOL.detached_threads++;
1145 MUTEX_UNLOCK(&MY_POOL.create_destruct_mutex);
1148 S_ithread_destruct(aTHX_ thread);
1159 /* Must have safe signals */
1160 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG) {
1161 Perl_croak(aTHX_ "Cannot signal threads without safe signals");
1164 /* Object method only */
1165 if (! sv_isobject(ST(0))) {
1166 Perl_croak(aTHX_ "Usage: $thr->kill('SIG...')");
1170 sig_name = SvPV_nolen(ST(1));
1171 if (isALPHA(*sig_name)) {
1172 if (*sig_name == 'S' && sig_name[1] == 'I' && sig_name[2] == 'G') {
1175 if ((signal = whichsig(sig_name)) < 0) {
1176 Perl_croak(aTHX_ "Unrecognized signal name: %s", sig_name);
1179 signal = SvIV(ST(1));
1182 /* Set the signal for the thread */
1183 thread = S_SV_to_ithread(aTHX_ ST(0));
1184 MUTEX_LOCK(&thread->mutex);
1185 if (thread->interp) {
1186 dTHXa(thread->interp);
1187 PL_psig_pend[signal]++;
1190 MUTEX_UNLOCK(&thread->mutex);
1192 /* Return the thread to allow for method chaining */
1194 /* XSRETURN(1); - implied */
1198 ithread_DESTROY(...)
1200 sv_unmagic(SvRV(ST(0)), PERL_MAGIC_shared_scalar);
1208 /* Compares TIDs to determine thread equality */
1209 if (sv_isobject(ST(0)) && sv_isobject(ST(1))) {
1210 ithread *thr1 = INT2PTR(ithread *, SvIV(SvRV(ST(0))));
1211 ithread *thr2 = INT2PTR(ithread *, SvIV(SvRV(ST(1))));
1212 are_equal = (thr1->tid == thr2->tid);
1217 /* Return 0 on false for backward compatibility */
1220 /* XSRETURN(1); - implied */
1232 /* Class method only */
1234 Perl_croak(aTHX_ "Usage: threads->object($tid)");
1236 classname = (char *)SvPV_nolen(ST(0));
1238 if ((items < 2) || ! SvOK(ST(1))) {
1242 /* threads->object($tid) */
1245 /* Walk through threads list */
1246 MUTEX_LOCK(&MY_POOL.create_destruct_mutex);
1247 for (thread = MY_POOL.main_thread.next;
1248 thread != &MY_POOL.main_thread;
1249 thread = thread->next)
1252 if (thread->tid == tid) {
1253 /* Ignore if detached or joined */
1254 if (! (thread->state & (PERL_ITHR_DETACHED|PERL_ITHR_JOINED))) {
1255 /* Put object on stack */
1256 ST(0) = sv_2mortal(S_ithread_to_SV(aTHX_ Nullsv, thread, classname, TRUE));
1262 MUTEX_UNLOCK(&MY_POOL.create_destruct_mutex);
1267 /* XSRETURN(1); - implied */
1271 ithread__handle(...);
1275 thread = S_SV_to_ithread(aTHX_ ST(0));
1277 XST_mUV(0, PTR2UV(&thread->handle));
1279 XST_mUV(0, PTR2UV(&thread->thr));
1281 /* XSRETURN(1); - implied */
1285 ithread_get_stack_size(...)
1290 if (sv_isobject(ST(0))) {
1291 /* $thr->get_stack_size() */
1292 ithread *thread = INT2PTR(ithread *, SvIV(SvRV(ST(0))));
1293 stack_size = thread->stack_size;
1295 /* threads->get_stack_size() */
1296 stack_size = MY_POOL.default_stack_size;
1298 XST_mIV(0, stack_size);
1299 /* XSRETURN(1); - implied */
1303 ithread_set_stack_size(...)
1309 Perl_croak(aTHX_ "Usage: threads->set_stack_size($size)");
1311 if (sv_isobject(ST(0))) {
1312 Perl_croak(aTHX_ "Cannot change stack size of an existing thread");
1315 old_size = MY_POOL.default_stack_size;
1316 MY_POOL.default_stack_size = S_good_stack_size(aTHX_ SvIV(ST(1)));
1317 XST_mIV(0, old_size);
1318 /* XSRETURN(1); - implied */
1322 ithread_is_running(...)
1326 /* Object method only */
1327 if (! sv_isobject(ST(0))) {
1328 Perl_croak(aTHX_ "Usage: $thr->is_running()");
1331 thread = INT2PTR(ithread *, SvIV(SvRV(ST(0))));
1332 ST(0) = (thread->state & PERL_ITHR_FINISHED) ? &PL_sv_no : &PL_sv_yes;
1333 /* XSRETURN(1); - implied */
1337 ithread_is_detached(...)
1341 thread = S_SV_to_ithread(aTHX_ ST(0));
1342 ST(0) = (thread->state & PERL_ITHR_DETACHED) ? &PL_sv_yes : &PL_sv_no;
1343 /* XSRETURN(1); - implied */
1347 ithread_is_joinable(...)
1351 /* Object method only */
1352 if (! sv_isobject(ST(0))) {
1353 Perl_croak(aTHX_ "Usage: $thr->is_joinable()");
1356 thread = INT2PTR(ithread *, SvIV(SvRV(ST(0))));
1357 MUTEX_LOCK(&thread->mutex);
1358 ST(0) = ((thread->state & PERL_ITHR_FINISHED) &&
1359 ! (thread->state & (PERL_ITHR_DETACHED|PERL_ITHR_JOINED)))
1360 ? &PL_sv_yes : &PL_sv_no;
1361 MUTEX_UNLOCK(&thread->mutex);
1362 /* XSRETURN(1); - implied */
1366 ithread_wantarray(...)
1370 thread = S_SV_to_ithread(aTHX_ ST(0));
1371 ST(0) = (thread->gimme & G_ARRAY) ? &PL_sv_yes :
1372 (thread->gimme & G_VOID) ? &PL_sv_undef
1373 /* G_SCALAR */ : &PL_sv_no;
1374 /* XSRETURN(1); - implied */
1378 ithread_set_thread_exit_only(...)
1383 Perl_croak(aTHX_ "Usage: ->set_thread_exit_only(boolean)");
1385 thread = S_SV_to_ithread(aTHX_ ST(0));
1386 MUTEX_LOCK(&thread->mutex);
1387 if (SvTRUE(ST(1))) {
1388 thread->state |= PERL_ITHR_THREAD_EXIT_ONLY;
1390 thread->state &= ~PERL_ITHR_THREAD_EXIT_ONLY;
1392 MUTEX_UNLOCK(&thread->mutex);
1394 #endif /* USE_ITHREADS */
1400 SV *my_pool_sv = *hv_fetch(PL_modglobal, MY_POOL_KEY,
1401 sizeof(MY_POOL_KEY)-1, TRUE);
1402 my_pool_t *my_poolp = (my_pool_t*)SvPVX(newSV(sizeof(my_pool_t)-1));
1406 Zero(my_poolp, 1, my_pool_t);
1407 sv_setuv(my_pool_sv, PTR2UV(my_poolp));
1409 PL_perl_destruct_level = 2;
1410 MUTEX_INIT(&MY_POOL.create_destruct_mutex);
1411 MUTEX_LOCK(&MY_POOL.create_destruct_mutex);
1413 PL_threadhook = &Perl_ithread_hook;
1415 MY_POOL.tid_counter = 1;
1416 # ifdef THREAD_CREATE_NEEDS_STACK
1417 MY_POOL.default_stack_size = THREAD_CREATE_NEEDS_STACK;
1420 /* The 'main' thread is thread 0.
1421 * It is detached (unjoinable) and immortal.
1424 MUTEX_INIT(&MY_POOL.main_thread.mutex);
1426 /* Head of the threads list */
1427 MY_POOL.main_thread.next = &MY_POOL.main_thread;
1428 MY_POOL.main_thread.prev = &MY_POOL.main_thread;
1430 MY_POOL.main_thread.count = 1; /* Immortal */
1432 MY_POOL.main_thread.interp = aTHX;
1433 MY_POOL.main_thread.state = PERL_ITHR_DETACHED; /* Detached */
1434 MY_POOL.main_thread.stack_size = MY_POOL.default_stack_size;
1436 MY_POOL.main_thread.thr = GetCurrentThreadId();
1438 MY_POOL.main_thread.thr = pthread_self();
1441 S_ithread_set(aTHX_ &MY_POOL.main_thread);
1442 MUTEX_UNLOCK(&MY_POOL.create_destruct_mutex);
1443 #endif /* USE_ITHREADS */