1 #define PERL_NO_GET_CONTEXT
6 # define NEED_PL_signals
7 # define NEED_newRV_noinc
8 # define NEED_sv_2pv_nolen
17 /* Supposed to be in Winbase.h */
18 # ifndef STACK_SIZE_PARAM_IS_A_RESERVATION
19 # define STACK_SIZE_PARAM_IS_A_RESERVATION 0x00010000
21 # include <win32thread.h>
24 typedef perl_os_thread pthread_t;
29 # define PERL_THREAD_SETSPECIFIC(k,v) pthread_setspecific(k,v)
30 # ifdef OLD_PTHREADS_API
31 # define PERL_THREAD_DETACH(t) pthread_detach(&(t))
33 # define PERL_THREAD_DETACH(t) pthread_detach((t))
36 #if !defined(HAS_GETPAGESIZE) && defined(I_SYS_PARAM)
37 # include <sys/param.h>
40 /* Values for 'state' member */
41 #define PERL_ITHR_JOINABLE 0
42 #define PERL_ITHR_DETACHED 1
43 #define PERL_ITHR_JOINED 2
44 #define PERL_ITHR_FINISHED 4
46 typedef struct _ithread {
47 struct _ithread *next; /* Next thread in the list */
48 struct _ithread *prev; /* Prev thread in the list */
49 PerlInterpreter *interp; /* The threads interpreter */
50 UV tid; /* Threads module's thread id */
51 perl_mutex mutex; /* Mutex for updating things in this struct */
52 int count; /* How many SVs have a reference to us */
53 int state; /* Detached, joined, finished, etc. */
54 int gimme; /* Context of create */
55 SV *init_function; /* Code to run */
56 SV *params; /* Args to pass function */
58 DWORD thr; /* OS's idea if thread id */
59 HANDLE handle; /* OS's waitable handle */
61 pthread_t thr; /* OS's handle for the thread */
67 /* Used by Perl interpreter for thread context switching */
68 #define MY_CXT_KEY "threads::_guts" XS_VERSION
77 /* Linked list of all threads */
78 static ithread *threads;
80 /* Protects the creation and destruction of threads*/
81 static perl_mutex create_destruct_mutex;
83 static UV tid_counter = 0;
84 static IV active_threads = 0;
85 #ifdef THREAD_CREATE_NEEDS_STACK
86 static IV default_stack_size = THREAD_CREATE_NEEDS_STACK;
88 static IV default_stack_size = 0;
90 static IV page_size = 0;
93 /* Used by Perl interpreter for thread context switching */
95 S_ithread_set(pTHX_ ithread *thread)
98 MY_CXT.thread = thread;
105 return (MY_CXT.thread);
109 /* Free any data (such as the Perl interpreter) attached to an ithread
110 * structure. This is a bit like undef on SVs, where the SV isn't freed,
111 * but the PVX is. Must be called with thread->mutex already held.
114 S_ithread_clear(pTHX_ ithread *thread)
116 PerlInterpreter *interp;
118 assert(thread->state & PERL_ITHR_FINISHED &&
119 thread->state & (PERL_ITHR_DETACHED|PERL_ITHR_JOINED));
121 interp = thread->interp;
125 PERL_SET_CONTEXT(interp);
126 S_ithread_set(aTHX_ thread);
128 SvREFCNT_dec(thread->params);
129 thread->params = Nullsv;
131 perl_destruct(interp);
132 thread->interp = NULL;
137 PERL_SET_CONTEXT(aTHX);
141 /* Free an ithread structure and any attached data if its count == 0 */
143 S_ithread_destruct(pTHX_ ithread *thread)
149 MUTEX_LOCK(&thread->mutex);
151 /* Thread is still in use */
152 if (thread->count != 0) {
153 MUTEX_UNLOCK(&thread->mutex);
157 MUTEX_LOCK(&create_destruct_mutex);
158 /* Main thread (0) is immortal and should never get here */
159 assert(thread->tid != 0);
161 /* Remove from circular list of threads */
162 thread->next->prev = thread->prev;
163 thread->prev->next = thread->next;
166 MUTEX_UNLOCK(&create_destruct_mutex);
168 /* Thread is now disowned */
169 S_ithread_clear(aTHX_ thread);
172 handle = thread->handle;
173 thread->handle = NULL;
175 MUTEX_UNLOCK(&thread->mutex);
176 MUTEX_DESTROY(&thread->mutex);
183 /* Call PerlMemShared_free() in the context of the "first" interpreter
184 * per http://www.nntp.perl.org/group/perl.perl5.porters/110772
187 PerlMemShared_free(thread);
193 Perl_ithread_hook(pTHX)
195 int veto_cleanup = 0;
196 MUTEX_LOCK(&create_destruct_mutex);
197 if ((aTHX == PL_curinterp) && (active_threads != 1)) {
198 if (ckWARN_d(WARN_THREADS)) {
199 Perl_warn(aTHX_ "A thread exited while %" IVdf " threads were running", active_threads);
203 MUTEX_UNLOCK(&create_destruct_mutex);
204 return (veto_cleanup);
208 /* MAGIC (in mg.h sense) hooks */
211 ithread_mg_get(pTHX_ SV *sv, MAGIC *mg)
213 ithread *thread = (ithread *)mg->mg_ptr;
214 SvIV_set(sv, PTR2IV(thread));
220 ithread_mg_free(pTHX_ SV *sv, MAGIC *mg)
222 ithread *thread = (ithread *)mg->mg_ptr;
225 MUTEX_LOCK(&thread->mutex);
226 cleanup = ((--thread->count == 0) &&
227 (thread->state & PERL_ITHR_FINISHED) &&
228 (thread->state & (PERL_ITHR_DETACHED|PERL_ITHR_JOINED)));
229 MUTEX_UNLOCK(&thread->mutex);
232 S_ithread_destruct(aTHX_ thread);
237 ithread_mg_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *param)
239 ithread *thread = (ithread *)mg->mg_ptr;
240 MUTEX_LOCK(&thread->mutex);
242 MUTEX_UNLOCK(&thread->mutex);
246 MGVTBL ithread_vtbl = {
247 ithread_mg_get, /* get */
251 ithread_mg_free, /* free */
253 ithread_mg_dup /* dup */
257 /* Provided default, minimum and rational stack sizes */
259 good_stack_size(pTHX_ IV stack_size)
261 /* Use default stack size if no stack size specified */
263 return (default_stack_size);
265 #ifdef PTHREAD_STACK_MIN
266 /* Can't use less than minimum */
267 if (stack_size < PTHREAD_STACK_MIN) {
268 if (ckWARN_d(WARN_THREADS)) {
269 Perl_warn(aTHX_ "Using minimum thread stack size of %" IVdf, (IV)PTHREAD_STACK_MIN);
271 return (PTHREAD_STACK_MIN);
275 /* Round up to page size boundary */
276 if (page_size <= 0) {
277 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
278 SETERRNO(0, SS_NORMAL);
280 page_size = sysconf(_SC_PAGESIZE);
282 page_size = sysconf(_SC_MMAP_PAGE_SIZE);
284 if ((long)page_size < 0) {
286 SV * const error = get_sv("@", FALSE);
287 (void)SvUPGRADE(error, SVt_PV);
288 Perl_croak(aTHX_ "PANIC: sysconf: %s", SvPV_nolen(error));
290 Perl_croak(aTHX_ "PANIC: sysconf: pagesize unknown");
294 # ifdef HAS_GETPAGESIZE
295 page_size = getpagesize();
297 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
298 page_size = PAGESIZE;
300 page_size = 8192; /* A conservative default */
304 Perl_croak(aTHX_ "PANIC: bad pagesize %" IVdf, (IV)page_size);
307 stack_size = ((stack_size + (page_size - 1)) / page_size) * page_size;
313 /* Starts executing the thread.
314 * Passed as the C level function to run in the new thread.
317 static THREAD_RET_TYPE
318 S_ithread_run(LPVOID arg)
321 S_ithread_run(void * arg)
324 ithread *thread = (ithread *)arg;
327 dTHXa(thread->interp);
328 PERL_SET_CONTEXT(thread->interp);
329 S_ithread_set(aTHX_ thread);
332 /* Far from clear messing with ->thr child-side is a good idea */
333 MUTEX_LOCK(&thread->mutex);
335 thread->thr = GetCurrentThreadId();
337 thread->thr = pthread_self();
339 MUTEX_UNLOCK(&thread->mutex);
342 PL_perl_destruct_level = 2;
345 AV *params = (AV *)SvRV(thread->params);
346 int len = (int)av_len(params)+1;
353 /* Put args on the stack */
355 for (ii=0; ii < len; ii++) {
356 XPUSHs(av_shift(params));
360 /* Run the specified function */
361 len = (int)call_sv(thread->init_function, thread->gimme|G_EVAL);
363 /* Remove args from stack and put back in params array */
365 for (ii=len-1; ii >= 0; ii--) {
367 av_store(params, ii, SvREFCNT_inc(sv));
370 /* Check for failure */
371 if (SvTRUE(ERRSV) && ckWARN_d(WARN_THREADS)) {
372 Perl_warn(aTHX_ "Thread %" UVuf " terminated abnormally: %" SVf, thread->tid, ERRSV);
378 /* Release function ref */
379 SvREFCNT_dec(thread->init_function);
380 thread->init_function = Nullsv;
383 PerlIO_flush((PerlIO *)NULL);
385 MUTEX_LOCK(&thread->mutex);
386 /* Mark as finished */
387 thread->state |= PERL_ITHR_FINISHED;
388 /* Cleanup if detached */
389 cleanup = (thread->state & PERL_ITHR_DETACHED);
390 MUTEX_UNLOCK(&thread->mutex);
393 S_ithread_destruct(aTHX_ thread);
395 MUTEX_LOCK(&create_destruct_mutex);
397 MUTEX_UNLOCK(&create_destruct_mutex);
407 /* Type conversion helper functions */
409 ithread_to_SV(pTHX_ SV *obj, ithread *thread, char *classname, bool inc)
415 MUTEX_LOCK(&thread->mutex);
417 MUTEX_UNLOCK(&thread->mutex);
424 sv = newSVrv(obj, classname);
425 sv_setiv(sv, PTR2IV(thread));
426 mg = sv_magicext(sv, Nullsv, PERL_MAGIC_shared_scalar, &ithread_vtbl, (char *)thread, 0);
427 mg->mg_flags |= MGf_DUP;
434 SV_to_ithread(pTHX_ SV *sv)
436 /* Argument is a thread */
438 return (INT2PTR(ithread *, SvIV(SvRV(sv))));
440 /* Argument is classname, therefore return current thread */
441 return (S_ithread_get(aTHX));
446 * Called in context of parent thread.
458 CLONE_PARAMS clone_param;
459 ithread *current_thread = S_ithread_get(aTHX);
461 SV **tmps_tmp = PL_tmps_stack;
462 IV tmps_ix = PL_tmps_ix;
464 int rc_stack_size = 0;
465 int rc_thread_create = 0;
468 MUTEX_LOCK(&create_destruct_mutex);
470 /* Allocate thread structure */
471 thread = (ithread *)PerlMemShared_malloc(sizeof(ithread));
473 MUTEX_UNLOCK(&create_destruct_mutex);
474 PerlLIO_write(PerlIO_fileno(Perl_error_log), PL_no_mem, strlen(PL_no_mem));
477 Zero(thread, 1, ithread);
479 /* Add to threads list */
480 thread->next = threads;
481 thread->prev = threads->prev;
482 threads->prev = thread;
483 thread->prev->next = thread;
485 /* Set count to 1 immediately in case thread exits before
486 * we return to caller!
490 MUTEX_INIT(&thread->mutex);
491 thread->tid = tid_counter++;
492 thread->stack_size = good_stack_size(aTHX_ stack_size);
493 thread->gimme = gimme;
495 /* "Clone" our interpreter into the thread's interpreter.
496 * This gives thread access to "static data" and code.
498 PerlIO_flush((PerlIO *)NULL);
499 S_ithread_set(aTHX_ thread);
501 SAVEBOOL(PL_srand_called); /* Save this so it becomes the correct value */
502 PL_srand_called = FALSE; /* Set it to false so we can detect if it gets
503 set during the clone */
506 thread->interp = perl_clone(aTHX, CLONEf_KEEP_PTR_TABLE | CLONEf_CLONE_HOST);
508 thread->interp = perl_clone(aTHX, CLONEf_KEEP_PTR_TABLE);
511 /* perl_clone() leaves us in new interpreter's context. As it is tricky
512 * to spot an implicit aTHX, create a new scope with aTHX matching the
513 * context for the duration of our work for new interpreter.
516 dTHXa(thread->interp);
520 /* Here we remove END blocks since they should only run in the thread
523 SvREFCNT_dec(PL_endav);
526 if (SvPOK(init_function)) {
527 thread->init_function = newSV(0);
528 sv_copypv(thread->init_function, init_function);
530 clone_param.flags = 0;
531 thread->init_function = sv_dup(init_function, &clone_param);
532 if (SvREFCNT(thread->init_function) == 0) {
533 SvREFCNT_inc(thread->init_function);
537 thread->params = sv_dup(params, &clone_param);
538 SvREFCNT_inc(thread->params);
540 /* The code below checks that anything living on the tmps stack and
541 * has been cloned (so it lives in the ptr_table) has a refcount
544 * If the refcount is 0 it means that a something on the stack/context
545 * was holding a reference to it and since we init_stacks() in
546 * perl_clone that won't get cleaned and we will get a leaked scalar.
547 * The reason it was cloned was that it lived on the @_ stack.
549 * Example of this can be found in bugreport 15837 where calls in the
550 * parameter list end up as a temp.
552 * One could argue that this fix should be in perl_clone.
554 while (tmps_ix > 0) {
555 SV* sv = (SV*)ptr_table_fetch(PL_ptr_table, tmps_tmp[tmps_ix]);
557 if (sv && SvREFCNT(sv) == 0) {
563 SvTEMP_off(thread->init_function);
564 ptr_table_free(PL_ptr_table);
566 PL_exit_flags |= PERL_EXIT_DESTRUCT_END;
568 S_ithread_set(aTHX_ current_thread);
569 PERL_SET_CONTEXT(aTHX);
571 /* Create/start the thread */
573 thread->handle = CreateThread(NULL,
574 (DWORD)thread->stack_size,
577 STACK_SIZE_PARAM_IS_A_RESERVATION,
581 static pthread_attr_t attr;
582 static int attr_inited = 0;
583 static int attr_joinable = PTHREAD_CREATE_JOINABLE;
585 pthread_attr_init(&attr);
589 # ifdef PTHREAD_ATTR_SETDETACHSTATE
590 /* Threads start out joinable */
591 PTHREAD_ATTR_SETDETACHSTATE(&attr, attr_joinable);
594 # ifdef _POSIX_THREAD_ATTR_STACKSIZE
595 /* Set thread's stack size */
596 if (thread->stack_size > 0) {
597 rc_stack_size = pthread_attr_setstacksize(&attr, (size_t)thread->stack_size);
601 /* Create the thread */
602 if (! rc_stack_size) {
603 # ifdef OLD_PTHREADS_API
604 rc_thread_create = pthread_create(&thread->thr,
609 # if defined(HAS_PTHREAD_ATTR_SETSCOPE) && defined(PTHREAD_SCOPE_SYSTEM)
610 pthread_attr_setscope(&attr, PTHREAD_SCOPE_SYSTEM);
612 rc_thread_create = pthread_create(&thread->thr,
619 # ifdef _POSIX_THREAD_ATTR_STACKSIZE
620 /* Try to get thread's actual stack size */
623 if (! pthread_attr_getstacksize(&attr, &stacksize)) {
625 thread->stack_size = (IV)stacksize;
633 /* Check for errors */
635 if (thread->handle == NULL) {
637 if (rc_stack_size || rc_thread_create) {
639 MUTEX_UNLOCK(&create_destruct_mutex);
641 S_ithread_destruct(aTHX_ thread);
643 if (ckWARN_d(WARN_THREADS)) {
645 Perl_warn(aTHX_ "Thread creation failed: pthread_attr_setstacksize(%" IVdf ") returned %d", thread->stack_size, rc_stack_size);
647 Perl_warn(aTHX_ "Thread creation failed: pthread_create returned %d", rc_thread_create);
650 return (&PL_sv_undef);
654 MUTEX_UNLOCK(&create_destruct_mutex);
658 return (ithread_to_SV(aTHX_ obj, thread, classname, FALSE));
661 #endif /* USE_ITHREADS */
664 MODULE = threads PACKAGE = threads PREFIX = ithread_
674 SV *function_to_call;
684 if ((items >= 2) && SvROK(ST(1)) && SvTYPE(SvRV(ST(1)))==SVt_PVHV) {
686 Perl_croak(aTHX_ "Usage: threads->create(\\%specs, function, ...)");
687 specs = (HV*)SvRV(ST(1));
691 Perl_croak(aTHX_ "Usage: threads->create(function, ...)");
696 if (sv_isobject(ST(0))) {
698 classname = HvNAME(SvSTASH(SvRV(ST(0))));
699 thread = INT2PTR(ithread *, SvIV(SvRV(ST(0))));
700 stack_size = thread->stack_size;
702 /* threads->create() */
703 classname = (char *)SvPV_nolen(ST(0));
704 stack_size = default_stack_size;
707 function_to_call = ST(idx+1);
712 if (hv_exists(specs, "stack", 5)) {
713 stack_size = SvIV(*hv_fetch(specs, "stack", 5, 0));
714 } else if (hv_exists(specs, "stacksize", 9)) {
715 stack_size = SvIV(*hv_fetch(specs, "stacksize", 9, 0));
716 } else if (hv_exists(specs, "stack_size", 10)) {
717 stack_size = SvIV(*hv_fetch(specs, "stack_size", 10, 0));
721 if (hv_exists(specs, "context", 7)) {
722 str = (char *)SvPV_nolen(*hv_fetch(specs, "context", 7, 0));
737 Perl_croak(aTHX_ "Invalid context: %s", str);
739 } else if (hv_exists(specs, "array", 5)) {
740 if (SvTRUE(*hv_fetch(specs, "array", 5, 0))) {
743 } else if (hv_exists(specs, "scalar", 6)) {
744 if (SvTRUE(*hv_fetch(specs, "scalar", 6, 0))) {
747 } else if (hv_exists(specs, "void", 4)) {
748 if (SvTRUE(*hv_fetch(specs, "void", 4, 0))) {
754 context = GIMME_V; /* Implicit context */
756 context |= (GIMME_V & (~(G_ARRAY|G_SCALAR|G_VOID)));
762 for (ii=2; ii < items ; ii++) {
763 av_push(params, SvREFCNT_inc(ST(idx+ii)));
768 ST(0) = sv_2mortal(S_ithread_create(aTHX_ Nullsv,
773 newRV_noinc((SV*)params)));
774 /* XSRETURN(1); - implied */
785 /* Class method only */
787 Perl_croak(aTHX_ "Usage: threads->list()");
788 classname = (char *)SvPV_nolen(ST(0));
790 /* Calling context */
791 list_context = (GIMME_V == G_ARRAY);
793 /* Walk through threads list */
794 MUTEX_LOCK(&create_destruct_mutex);
795 for (thread = threads->next;
797 thread = thread->next)
799 /* Ignore detached or joined threads */
800 if (thread->state & (PERL_ITHR_DETACHED|PERL_ITHR_JOINED)) {
803 /* Push object on stack if list context */
805 XPUSHs(sv_2mortal(ithread_to_SV(aTHX_ Nullsv, thread, classname, TRUE)));
809 MUTEX_UNLOCK(&create_destruct_mutex);
810 /* If scalar context, send back count */
811 if (! list_context) {
822 /* Class method only */
824 Perl_croak(aTHX_ "Usage: threads->self()");
825 classname = (char *)SvPV_nolen(ST(0));
827 thread = S_ithread_get(aTHX);
829 ST(0) = sv_2mortal(ithread_to_SV(aTHX_ Nullsv, thread, classname, TRUE));
830 /* XSRETURN(1); - implied */
838 thread = SV_to_ithread(aTHX_ ST(0));
839 XST_mUV(0, thread->tid);
840 /* XSRETURN(1); - implied */
857 /* Object method only */
858 if (! sv_isobject(ST(0)))
859 Perl_croak(aTHX_ "Usage: $thr->join()");
861 /* Check if the thread is joinable */
862 thread = SV_to_ithread(aTHX_ ST(0));
863 MUTEX_LOCK(&thread->mutex);
864 join_err = (thread->state & (PERL_ITHR_DETACHED|PERL_ITHR_JOINED));
865 MUTEX_UNLOCK(&thread->mutex);
867 if (join_err & PERL_ITHR_DETACHED) {
868 Perl_croak(aTHX_ "Cannot join a detached thread");
870 Perl_croak(aTHX_ "Thread already joined");
874 /* Join the thread */
876 waitcode = WaitForSingleObject(thread->handle, INFINITE);
878 pthread_join(thread->thr, &retval);
881 MUTEX_LOCK(&thread->mutex);
883 thread->state |= PERL_ITHR_JOINED;
885 /* Get the return value from the call_sv */
888 PerlInterpreter *other_perl;
889 CLONE_PARAMS clone_params;
890 ithread *current_thread;
892 params_copy = (AV *)SvRV(thread->params);
893 other_perl = thread->interp;
894 clone_params.stashes = newAV();
895 clone_params.flags = CLONEf_JOIN_IN;
896 PL_ptr_table = ptr_table_new();
897 current_thread = S_ithread_get(aTHX);
898 S_ithread_set(aTHX_ thread);
899 /* Ensure 'meaningful' addresses retain their meaning */
900 ptr_table_store(PL_ptr_table, &other_perl->Isv_undef, &PL_sv_undef);
901 ptr_table_store(PL_ptr_table, &other_perl->Isv_no, &PL_sv_no);
902 ptr_table_store(PL_ptr_table, &other_perl->Isv_yes, &PL_sv_yes);
903 params = (AV *)sv_dup((SV*)params_copy, &clone_params);
904 S_ithread_set(aTHX_ current_thread);
905 SvREFCNT_dec(clone_params.stashes);
906 SvREFCNT_inc(params);
907 ptr_table_free(PL_ptr_table);
911 /* We are finished with the thread */
912 S_ithread_clear(aTHX_ thread);
913 MUTEX_UNLOCK(&thread->mutex);
915 /* If no return values, then just return */
920 /* Put return values on stack */
921 len = (int)AvFILL(params);
922 for (ii=0; ii <= len; ii++) {
923 SV* param = av_shift(params);
924 XPUSHs(sv_2mortal(param));
927 /* Free return value array */
928 SvREFCNT_dec(params);
944 thread = SV_to_ithread(aTHX_ ST(0));
945 MUTEX_LOCK(&thread->mutex);
947 /* Check if the thread is detachable */
948 if ((detach_err = (thread->state & (PERL_ITHR_DETACHED|PERL_ITHR_JOINED)))) {
949 MUTEX_UNLOCK(&thread->mutex);
950 if (detach_err & PERL_ITHR_DETACHED) {
951 Perl_croak(aTHX_ "Thread already detached");
953 Perl_croak(aTHX_ "Cannot detach a joined thread");
957 /* Detach the thread */
958 thread->state |= PERL_ITHR_DETACHED;
960 /* Windows has no 'detach thread' function */
962 PERL_THREAD_DETACH(thread->thr);
964 /* Cleanup if finished */
965 cleanup = (thread->state & PERL_ITHR_FINISHED);
966 MUTEX_UNLOCK(&thread->mutex);
969 S_ithread_destruct(aTHX_ thread);
979 /* Must have safe signals */
980 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)
981 Perl_croak(aTHX_ "Cannot signal other threads without safe signals");
983 /* Object method only */
984 if (! sv_isobject(ST(0)))
985 Perl_croak(aTHX_ "Usage: $thr->kill('SIG...')");
988 thread = SV_to_ithread(aTHX_ ST(0));
991 sig_name = SvPV_nolen(ST(1));
992 if (isALPHA(*sig_name)) {
993 if (*sig_name == 'S' && sig_name[1] == 'I' && sig_name[2] == 'G')
995 if ((signal = whichsig(sig_name)) < 0)
996 Perl_croak(aTHX_ "Unrecognized signal name: %s", sig_name);
998 signal = SvIV(ST(1));
1000 /* Set the signal for the thread */
1002 dTHXa(thread->interp);
1003 PL_psig_pend[signal]++;
1007 /* Return the thread to allow for method chaining */
1009 /* XSRETURN(1); - implied */
1013 ithread_DESTROY(...)
1015 sv_unmagic(SvRV(ST(0)), PERL_MAGIC_shared_scalar);
1023 /* Compares TIDs to determine thread equality */
1024 if (sv_isobject(ST(0)) && sv_isobject(ST(1))) {
1025 ithread *thr1 = INT2PTR(ithread *, SvIV(SvRV(ST(0))));
1026 ithread *thr2 = INT2PTR(ithread *, SvIV(SvRV(ST(1))));
1027 are_equal = (thr1->tid == thr2->tid);
1032 /* Return 0 on false for backward compatibility */
1035 /* XSRETURN(1); - implied */
1046 /* Class method only */
1048 Perl_croak(aTHX_ "Usage: threads->object($tid)");
1049 classname = (char *)SvPV_nolen(ST(0));
1051 if ((items < 2) || ! SvOK(ST(1))) {
1055 /* threads->object($tid) */
1058 /* Walk through threads list */
1059 MUTEX_LOCK(&create_destruct_mutex);
1060 for (thread = threads->next;
1062 thread = thread->next)
1064 /* Look for TID, but ignore detached or joined threads */
1065 if ((thread->tid != tid) ||
1066 (thread->state & (PERL_ITHR_DETACHED|PERL_ITHR_JOINED)))
1070 /* Put object on stack */
1071 ST(0) = sv_2mortal(ithread_to_SV(aTHX_ Nullsv, thread, classname, TRUE));
1075 MUTEX_UNLOCK(&create_destruct_mutex);
1079 /* XSRETURN(1); - implied */
1083 ithread__handle(...);
1087 thread = SV_to_ithread(aTHX_ ST(0));
1089 XST_mUV(0, PTR2UV(&thread->handle));
1091 XST_mUV(0, PTR2UV(&thread->thr));
1093 /* XSRETURN(1); - implied */
1097 ithread_get_stack_size(...)
1101 if (sv_isobject(ST(0))) {
1102 /* $thr->get_stack_size() */
1103 ithread *thread = INT2PTR(ithread *, SvIV(SvRV(ST(0))));
1104 stack_size = thread->stack_size;
1106 /* threads->get_stack_size() */
1107 stack_size = default_stack_size;
1109 XST_mIV(0, stack_size);
1110 /* XSRETURN(1); - implied */
1114 ithread_set_stack_size(...)
1119 Perl_croak(aTHX_ "Usage: threads->set_stack_size($size)");
1120 if (sv_isobject(ST(0)))
1121 Perl_croak(aTHX_ "Cannot change stack size of an existing thread");
1123 old_size = default_stack_size;
1124 default_stack_size = good_stack_size(aTHX_ SvIV(ST(1)));
1125 XST_mIV(0, old_size);
1126 /* XSRETURN(1); - implied */
1128 #endif /* USE_ITHREADS */
1134 /* The 'main' thread is thread 0.
1135 * It is detached (unjoinable) and immortal.
1141 PL_perl_destruct_level = 2;
1142 MUTEX_INIT(&create_destruct_mutex);
1143 MUTEX_LOCK(&create_destruct_mutex);
1145 PL_threadhook = &Perl_ithread_hook;
1147 thread = (ithread *)PerlMemShared_malloc(sizeof(ithread));
1149 PerlLIO_write(PerlIO_fileno(Perl_error_log), PL_no_mem, strlen(PL_no_mem));
1152 Zero(thread, 1, ithread);
1154 PL_perl_destruct_level = 2;
1155 MUTEX_INIT(&thread->mutex);
1157 thread->tid = tid_counter++; /* Thread 0 */
1159 /* Head of the threads list */
1161 thread->next = thread;
1162 thread->prev = thread;
1164 thread->count = 1; /* Immortal */
1166 thread->interp = aTHX;
1167 thread->state = PERL_ITHR_DETACHED; /* Detached */
1168 thread->stack_size = default_stack_size;
1170 thread->thr = GetCurrentThreadId();
1172 thread->thr = pthread_self();
1177 S_ithread_set(aTHX_ thread);
1178 MUTEX_UNLOCK(&create_destruct_mutex);
1179 #endif /* USE_ITHREADS */