1 #define PERL_NO_GET_CONTEXT
2 /* Workaround for mingw 32-bit compiler by mingw-w64.sf.net - has to come before any #include.
3 * It also defines USE_NO_MINGW_SETJMP_TWO_ARGS for the mingw.org 32-bit compilers ... but
4 * that's ok as that compiler makes no use of that symbol anyway */
5 #if defined(WIN32) && defined(__MINGW32__) && !defined(__MINGW64__)
6 # define USE_NO_MINGW_SETJMP_TWO_ARGS 1
11 /* Workaround for XSUB.h bug under WIN32 */
14 # if defined(USE_NO_MINGW_SETJMP_TWO_ARGS) || (!defined(__BORLANDC__) && !defined(__MINGW64__))
15 # define setjmp(x) _setjmp(x)
17 # if defined(__MINGW64__)
18 # define setjmp(x) _setjmpex((x), mingw_getsp())
22 # define NEED_PL_signals
23 # define NEED_newRV_noinc
24 # define NEED_sv_2pv_flags
29 # define sv_dup_inc(s,t) SvREFCNT_inc(sv_dup(s,t))
31 #ifndef PERL_UNUSED_RESULT
32 # if defined(__GNUC__) && defined(HASATTRIBUTE_WARN_UNUSED_RESULT)
33 # define PERL_UNUSED_RESULT(v) STMT_START { __typeof__(v) z = (v); (void)sizeof(z); } STMT_END
35 # define PERL_UNUSED_RESULT(v) ((void)(v))
43 # define YIELD sleep(0)
47 /* Supposed to be in Winbase.h */
48 # ifndef STACK_SIZE_PARAM_IS_A_RESERVATION
49 # define STACK_SIZE_PARAM_IS_A_RESERVATION 0x00010000
51 # include <win32thread.h>
54 typedef perl_os_thread pthread_t;
59 # define PERL_THREAD_SETSPECIFIC(k,v) pthread_setspecific(k,v)
60 # ifdef OLD_PTHREADS_API
61 # define PERL_THREAD_DETACH(t) pthread_detach(&(t))
63 # define PERL_THREAD_DETACH(t) pthread_detach((t))
66 #if !defined(HAS_GETPAGESIZE) && defined(I_SYS_PARAM)
67 # include <sys/param.h>
70 /* Values for 'state' member */
71 #define PERL_ITHR_DETACHED 1 /* Thread has been detached */
72 #define PERL_ITHR_JOINED 2 /* Thread is being / has been joined */
73 #define PERL_ITHR_FINISHED 4 /* Thread has finished execution */
74 #define PERL_ITHR_THREAD_EXIT_ONLY 8 /* exit() only exits current thread */
75 #define PERL_ITHR_NONVIABLE 16 /* Thread creation failed */
76 #define PERL_ITHR_DIED 32 /* Thread finished by dying */
78 #define PERL_ITHR_UNCALLABLE (PERL_ITHR_DETACHED|PERL_ITHR_JOINED)
81 typedef struct _ithread {
82 struct _ithread *next; /* Next thread in the list */
83 struct _ithread *prev; /* Prev thread in the list */
84 PerlInterpreter *interp; /* The threads interpreter */
85 UV tid; /* Threads module's thread id */
86 perl_mutex mutex; /* Mutex for updating things in this struct */
87 int count; /* Reference count. See S_ithread_create. */
88 int state; /* Detached, joined, finished, etc. */
89 int gimme; /* Context of create */
90 SV *init_function; /* Code to run */
91 AV *params; /* Args to pass function */
93 DWORD thr; /* OS's idea if thread id */
94 HANDLE handle; /* OS's waitable handle */
96 pthread_t thr; /* OS's handle for the thread */
99 SV *err; /* Error from abnormally terminated thread */
100 char *err_class; /* Error object's classname if applicable */
102 sigset_t initial_sigmask; /* Thread wakes up with signals blocked */
107 #define MY_CXT_KEY "threads::_cxt" XS_VERSION
110 /* Used by Perl interpreter for thread context switching */
117 #define MY_POOL_KEY "threads::_pool" XS_VERSION
120 /* Structure for 'main' thread
121 * Also forms the 'base' for the doubly-linked list of threads */
124 /* Protects the creation and destruction of threads*/
125 perl_mutex create_destruct_mutex;
132 IV default_stack_size;
137 SV *my_pool_sv = *hv_fetch(PL_modglobal, MY_POOL_KEY, \
138 sizeof(MY_POOL_KEY)-1, TRUE); \
139 my_pool_t *my_poolp = INT2PTR(my_pool_t*, SvUV(my_pool_sv))
141 #define MY_POOL (*my_poolp)
143 #if defined(WIN32) || (defined(__amigaos4__) && defined(__NEWLIB__))
144 # undef THREAD_SIGNAL_BLOCKING
146 # define THREAD_SIGNAL_BLOCKING
149 #ifdef THREAD_SIGNAL_BLOCKING
151 /* Block most signals for calling thread, setting the old signal mask to
152 * oldmask, if it is not NULL */
154 S_block_most_signals(sigset_t *oldmask)
158 sigfillset(&newmask);
159 /* Don't block certain "important" signals (stolen from mg.c) */
161 sigdelset(&newmask, SIGILL);
164 sigdelset(&newmask, SIGBUS);
167 sigdelset(&newmask, SIGSEGV);
171 /* no per-thread blocking available */
172 return sigprocmask(SIG_BLOCK, &newmask, oldmask);
174 return pthread_sigmask(SIG_BLOCK, &newmask, oldmask);
178 /* Set the signal mask for this thread to newmask */
180 S_set_sigmask(sigset_t *newmask)
183 return sigprocmask(SIG_SETMASK, newmask, NULL);
185 return pthread_sigmask(SIG_SETMASK, newmask, NULL);
190 /* Used by Perl interpreter for thread context switching */
192 S_ithread_set(pTHX_ ithread *thread)
195 MY_CXT.context = thread;
202 return (MY_CXT.context);
206 /* Free any data (such as the Perl interpreter) attached to an ithread
207 * structure. This is a bit like undef on SVs, where the SV isn't freed,
208 * but the PVX is. Must be called with thread->mutex already locked. Also,
209 * must be called with MY_POOL.create_destruct_mutex unlocked as destruction
210 * of the interpreter can lead to recursive destruction calls that could
211 * lead to a deadlock on that mutex.
214 S_ithread_clear(pTHX_ ithread *thread)
216 PerlInterpreter *interp;
221 assert(((thread->state & PERL_ITHR_FINISHED) &&
222 (thread->state & PERL_ITHR_UNCALLABLE))
224 (thread->state & PERL_ITHR_NONVIABLE));
226 #ifdef THREAD_SIGNAL_BLOCKING
227 /* We temporarily set the interpreter context to the interpreter being
228 * destroyed. It's in no condition to handle signals while it's being
231 S_block_most_signals(&origmask);
234 interp = thread->interp;
238 PERL_SET_CONTEXT(interp);
239 S_ithread_set(aTHX_ thread);
241 SvREFCNT_dec(thread->params);
242 thread->params = NULL;
245 SvREFCNT_dec(thread->err);
246 thread->err = Nullsv;
249 perl_destruct(interp);
251 thread->interp = NULL;
254 PERL_SET_CONTEXT(aTHX);
255 #ifdef THREAD_SIGNAL_BLOCKING
256 S_set_sigmask(&origmask);
261 /* Decrement the refcount of an ithread, and if it reaches zero, free it.
262 * Must be called with the mutex held.
263 * On return, mutex is released (or destroyed).
266 S_ithread_free(pTHX_ ithread *thread)
267 PERL_TSA_RELEASE(thread->mutex)
274 if (! (thread->state & PERL_ITHR_NONVIABLE)) {
275 assert(thread->count > 0);
276 if (--thread->count > 0) {
277 MUTEX_UNLOCK(&thread->mutex);
280 assert((thread->state & PERL_ITHR_FINISHED) &&
281 (thread->state & PERL_ITHR_UNCALLABLE));
283 MUTEX_UNLOCK(&thread->mutex);
285 /* Main thread (0) is immortal and should never get here */
286 assert(thread->tid != 0);
288 /* Remove from circular list of threads */
289 MUTEX_LOCK(&MY_POOL.create_destruct_mutex);
290 assert(thread->prev && thread->next);
291 thread->next->prev = thread->prev;
292 thread->prev->next = thread->next;
295 MUTEX_UNLOCK(&MY_POOL.create_destruct_mutex);
297 /* Thread is now disowned */
298 MUTEX_LOCK(&thread->mutex);
299 S_ithread_clear(aTHX_ thread);
302 handle = thread->handle;
303 thread->handle = NULL;
305 MUTEX_UNLOCK(&thread->mutex);
306 MUTEX_DESTROY(&thread->mutex);
314 PerlMemShared_free(thread);
316 /* total_threads >= 1 is used to veto cleanup by the main thread,
317 * should it happen to exit while other threads still exist.
318 * Decrement this as the very last thing in the thread's existence.
319 * Otherwise, MY_POOL and global state such as PL_op_mutex may get
320 * freed while we're still using it.
322 MUTEX_LOCK(&MY_POOL.create_destruct_mutex);
323 MY_POOL.total_threads--;
324 MUTEX_UNLOCK(&MY_POOL.create_destruct_mutex);
329 S_ithread_count_inc(pTHX_ ithread *thread)
330 PERL_TSA_EXCLUDES(thread->mutex)
332 MUTEX_LOCK(&thread->mutex);
334 MUTEX_UNLOCK(&thread->mutex);
338 /* Warn if exiting with any unjoined threads */
342 int veto_cleanup, warn;
345 MUTEX_LOCK(&MY_POOL.create_destruct_mutex);
346 veto_cleanup = (MY_POOL.total_threads > 0);
347 warn = (MY_POOL.running_threads || MY_POOL.joinable_threads);
348 MUTEX_UNLOCK(&MY_POOL.create_destruct_mutex);
351 if (ckWARN_d(WARN_THREADS)) {
352 Perl_warn(aTHX_ "Perl exited with active threads:\n\t%"
353 IVdf " running and unjoined\n\t%"
354 IVdf " finished and unjoined\n\t%"
355 IVdf " running and detached\n",
356 MY_POOL.running_threads,
357 MY_POOL.joinable_threads,
358 MY_POOL.detached_threads);
362 return (veto_cleanup);
366 /* Called from perl_destruct() in each thread. If it's the main thread,
367 * stop it from freeing everything if there are other threads still running.
370 Perl_ithread_hook(pTHX)
373 return ((aTHX == MY_POOL.main_thread.interp) ? S_exit_warning(aTHX) : 0);
377 /* MAGIC (in mg.h sense) hooks */
380 ithread_mg_get(pTHX_ SV *sv, MAGIC *mg)
382 ithread *thread = (ithread *)mg->mg_ptr;
383 SvIV_set(sv, PTR2IV(thread));
389 ithread_mg_free(pTHX_ SV *sv, MAGIC *mg)
391 ithread *thread = (ithread *)mg->mg_ptr;
393 MUTEX_LOCK(&thread->mutex);
394 S_ithread_free(aTHX_ thread); /* Releases MUTEX */
399 ithread_mg_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *param)
401 PERL_UNUSED_ARG(param);
402 S_ithread_count_inc(aTHX_ (ithread *)mg->mg_ptr);
406 STATIC const MGVTBL ithread_vtbl = {
407 ithread_mg_get, /* get */
411 ithread_mg_free, /* free */
413 ithread_mg_dup, /* dup */
414 #if (PERL_VERSION > 8) || (PERL_VERSION == 8 && PERL_SUBVERSION > 8)
420 /* Provided default, minimum and rational stack sizes */
422 S_good_stack_size(pTHX_ IV stack_size)
426 /* Use default stack size if no stack size specified */
428 return (MY_POOL.default_stack_size);
431 #ifdef PTHREAD_STACK_MIN
432 /* Can't use less than minimum */
433 if (stack_size < PTHREAD_STACK_MIN) {
434 if (ckWARN(WARN_THREADS)) {
435 Perl_warn(aTHX_ "Using minimum thread stack size of %" IVdf, (IV)PTHREAD_STACK_MIN);
437 return (PTHREAD_STACK_MIN);
441 /* Round up to page size boundary */
442 if (MY_POOL.page_size <= 0) {
443 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
444 SETERRNO(0, SS_NORMAL);
446 MY_POOL.page_size = sysconf(_SC_PAGESIZE);
448 MY_POOL.page_size = sysconf(_SC_MMAP_PAGE_SIZE);
450 if ((long)MY_POOL.page_size < 0) {
452 SV * const error = get_sv("@", 0);
453 (void)SvUPGRADE(error, SVt_PV);
454 Perl_croak(aTHX_ "PANIC: sysconf: %s", SvPV_nolen(error));
456 Perl_croak(aTHX_ "PANIC: sysconf: pagesize unknown");
460 # ifdef HAS_GETPAGESIZE
461 MY_POOL.page_size = getpagesize();
463 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
464 MY_POOL.page_size = PAGESIZE;
466 MY_POOL.page_size = 8192; /* A conservative default */
469 if (MY_POOL.page_size <= 0) {
470 Perl_croak(aTHX_ "PANIC: bad pagesize %" IVdf, (IV)MY_POOL.page_size);
474 stack_size = ((stack_size + (MY_POOL.page_size - 1)) / MY_POOL.page_size) * MY_POOL.page_size;
479 /* run some code within a JMPENV environment.
480 * Having it in a separate small function helps avoid
481 * 'variable ‘foo’ might be clobbered by ‘longjmp’
483 * The three _p vars return values to the caller
487 S_jmpenv_run(pTHX_ int action, ithread *thread,
488 int *len_p, int *exit_app_p, int *exit_code_p)
491 volatile I32 oldscope = PL_scopestack_ix;
497 /* Run the specified function */
498 *len_p = (int)call_sv(thread->init_function, thread->gimme|G_EVAL);
500 else if (action == 1) {
501 /* Warn that thread died */
502 Perl_warn(aTHX_ "Thread %" UVuf " terminated abnormally: %" SVf, thread->tid, ERRSV);
505 /* Warn if there are unjoined threads */
506 S_exit_warning(aTHX);
508 } else if (jmp_rc == 2) {
511 *exit_code_p = STATUS_CURRENT;
512 while (PL_scopestack_ix > oldscope) {
521 /* Starts executing the thread.
522 * Passed as the C level function to run in the new thread.
525 STATIC THREAD_RET_TYPE
526 S_ithread_run(LPVOID arg)
529 S_ithread_run(void * arg)
532 ithread *thread = (ithread *)arg;
533 int exit_app = 0; /* Thread terminated using 'exit' */
535 int died = 0; /* Thread terminated abnormally */
538 dTHXa(thread->interp);
542 /* The following mutex lock + mutex unlock pair explained.
545 * - calls ithread_create (and S_ithread_create), which:
546 * - creates the new thread
547 * - does MUTEX_LOCK(&thread->mutex)
548 * - calls pthread_create(..., S_ithread_run,...)
550 * - starts the S_ithread_run (where we are now), which:
551 * - tries to MUTEX_LOCK(&thread->mutex)
554 * - continues doing more createy stuff
555 * - does MUTEX_UNLOCK(&thread->mutex)
558 * - finishes MUTEX_LOCK(&thread->mutex)
559 * - does MUTEX_UNLOCK(&thread->mutex)
562 MUTEX_LOCK(&thread->mutex);
563 MUTEX_UNLOCK(&thread->mutex);
565 PERL_SET_CONTEXT(thread->interp);
566 S_ithread_set(aTHX_ thread);
568 #ifdef THREAD_SIGNAL_BLOCKING
569 /* Thread starts with most signals blocked - restore the signal mask from
570 * the ithread struct.
572 S_set_sigmask(&thread->initial_sigmask);
575 PL_perl_destruct_level = 2;
578 AV *params = thread->params;
579 int len = (int)av_len(params)+1;
587 /* Put args on the stack */
589 for (ii=0; ii < len; ii++) {
590 XPUSHs(av_shift(params));
594 jmp_rc = S_jmpenv_run(aTHX_ 0, thread, &len, &exit_app, &exit_code);
596 #ifdef THREAD_SIGNAL_BLOCKING
597 /* The interpreter is finished, so this thread can stop receiving
598 * signals. This way, our signal handler doesn't get called in the
599 * middle of our parent thread calling perl_destruct()...
601 S_block_most_signals(NULL);
604 /* Remove args from stack and put back in params array */
606 for (ii=len-1; ii >= 0; ii--) {
608 if (jmp_rc == 0 && (thread->gimme & G_WANT) != G_VOID) {
609 av_store(params, ii, SvREFCNT_inc(sv));
616 /* Check for abnormal termination */
618 died = PERL_ITHR_DIED;
619 thread->err = newSVsv(ERRSV);
620 /* If ERRSV is an object, remember the classname and then
621 * rebless into 'main' so it will survive 'cloning'
623 if (sv_isobject(thread->err)) {
624 thread->err_class = HvNAME(SvSTASH(SvRV(thread->err)));
625 sv_bless(thread->err, gv_stashpv("main", 0));
628 if (ckWARN_d(WARN_THREADS)) {
629 (void)S_jmpenv_run(aTHX_ 1, thread, NULL,
630 &exit_app, &exit_code);
634 /* Release function ref */
635 SvREFCNT_dec(thread->init_function);
636 thread->init_function = Nullsv;
639 PerlIO_flush((PerlIO *)NULL);
641 MUTEX_LOCK(&MY_POOL.create_destruct_mutex);
642 MUTEX_LOCK(&thread->mutex);
643 /* Mark as finished */
644 thread->state |= (PERL_ITHR_FINISHED | died);
645 /* Clear exit flag if required */
646 if (thread->state & PERL_ITHR_THREAD_EXIT_ONLY) {
650 /* Adjust thread status counts */
651 if (thread->state & PERL_ITHR_DETACHED) {
652 MY_POOL.detached_threads--;
654 MY_POOL.running_threads--;
655 MY_POOL.joinable_threads++;
657 MUTEX_UNLOCK(&thread->mutex);
658 MUTEX_UNLOCK(&MY_POOL.create_destruct_mutex);
660 /* Exit application if required */
662 (void)S_jmpenv_run(aTHX_ 2, thread, NULL, &exit_app, &exit_code);
666 /* At this point, the interpreter may have been freed, so call
667 * free in the the context of of the 'main' interpreter which
668 * can't have been freed due to the veto_cleanup mechanism.
670 aTHX = MY_POOL.main_thread.interp;
672 MUTEX_LOCK(&thread->mutex);
673 S_ithread_free(aTHX_ thread); /* Releases MUTEX */
683 /* Type conversion helper functions */
686 S_ithread_to_SV(pTHX_ SV *obj, ithread *thread, char *classname, bool inc)
692 S_ithread_count_inc(aTHX_ thread);
698 sv = newSVrv(obj, classname);
699 sv_setiv(sv, PTR2IV(thread));
700 mg = sv_magicext(sv, Nullsv, PERL_MAGIC_shared_scalar, &ithread_vtbl, (char *)thread, 0);
701 mg->mg_flags |= MGf_DUP;
708 S_SV_to_ithread(pTHX_ SV *sv)
710 /* Argument is a thread */
712 return (INT2PTR(ithread *, SvIV(SvRV(sv))));
714 /* Argument is classname, therefore return current thread */
715 return (S_ithread_get(aTHX));
720 * Called in context of parent thread.
721 * Called with my_pool->create_destruct_mutex locked.
722 * (Unlocked both on error and on success.)
726 PerlInterpreter *parent_perl,
734 PERL_TSA_RELEASE(my_pool->create_destruct_mutex)
738 ithread *current_thread = S_ithread_get(aTHX);
742 #if PERL_VERSION <= 8 && PERL_SUBVERSION <= 7
743 SV **tmps_tmp = PL_tmps_stack;
744 IV tmps_ix = PL_tmps_ix;
747 int rc_stack_size = 0;
748 int rc_thread_create = 0;
751 /* Allocate thread structure in context of the main thread's interpreter */
753 PERL_SET_CONTEXT(my_pool->main_thread.interp);
754 thread = (ithread *)PerlMemShared_malloc(sizeof(ithread));
756 PERL_SET_CONTEXT(aTHX);
758 /* This lock was acquired in ithread_create()
759 * prior to calling S_ithread_create(). */
760 MUTEX_UNLOCK(&my_pool->create_destruct_mutex);
762 int fd = PerlIO_fileno(Perl_error_log);
764 /* If there's no error_log, we cannot scream about it missing. */
765 PERL_UNUSED_RESULT(PerlLIO_write(fd, PL_no_mem, strlen(PL_no_mem)));
770 Zero(thread, 1, ithread);
772 /* Add to threads list */
773 thread->next = &my_pool->main_thread;
774 thread->prev = my_pool->main_thread.prev;
775 my_pool->main_thread.prev = thread;
776 thread->prev->next = thread;
777 my_pool->total_threads++;
779 /* 1 ref to be held by the local var 'thread' in S_ithread_run().
780 * 1 ref to be held by the threads object that we assume we will
781 * be embedded in upon our return.
782 * 1 ref to be the responsibility of join/detach, so we don't get
783 * freed until join/detach, even if no thread objects remain.
784 * This allows the following to work:
785 * { threads->create(sub{...}); } threads->object(1)->join;
789 /* Block new thread until ->create() call finishes */
790 MUTEX_INIT(&thread->mutex);
791 MUTEX_LOCK(&thread->mutex); /* See S_ithread_run() for more detail. */
793 thread->tid = my_pool->tid_counter++;
794 thread->stack_size = S_good_stack_size(aTHX_ stack_size);
795 thread->gimme = gimme;
796 thread->state = exit_opt;
798 /* "Clone" our interpreter into the thread's interpreter.
799 * This gives thread access to "static data" and code.
801 PerlIO_flush((PerlIO *)NULL);
802 S_ithread_set(aTHX_ thread);
804 SAVEBOOL(PL_srand_called); /* Save this so it becomes the correct value */
805 PL_srand_called = FALSE; /* Set it to false so we can detect if it gets
806 set during the clone */
808 #ifdef THREAD_SIGNAL_BLOCKING
809 /* perl_clone() will leave us the new interpreter's context. This poses
810 * two problems for our signal handler. First, it sets the new context
811 * before the new interpreter struct is fully initialized, so our signal
812 * handler might find bogus data in the interpreter struct it gets.
813 * Second, even if the interpreter is initialized before a signal comes in,
814 * we would like to avoid that interpreter receiving notifications for
815 * signals (especially when they ought to be for the one running in this
816 * thread), until it is running in its own thread. Another problem is that
817 * the new thread will not have set the context until some time after it
818 * has started, so it won't be safe for our signal handler to run until
821 * So we block most signals here, so the new thread will inherit the signal
822 * mask, and unblock them right after the thread creation. The original
823 * mask is saved in the thread struct so that the new thread can restore
826 S_block_most_signals(&thread->initial_sigmask);
830 thread->interp = perl_clone(aTHX, CLONEf_KEEP_PTR_TABLE | CLONEf_CLONE_HOST);
832 thread->interp = perl_clone(aTHX, CLONEf_KEEP_PTR_TABLE);
835 /* perl_clone() leaves us in new interpreter's context. As it is tricky
836 * to spot an implicit aTHX, create a new scope with aTHX matching the
837 * context for the duration of our work for new interpreter.
840 #if (PERL_VERSION > 13) || (PERL_VERSION == 13 && PERL_SUBVERSION > 1)
841 CLONE_PARAMS *clone_param = Perl_clone_params_new(aTHX, thread->interp);
843 CLONE_PARAMS clone_param_s;
844 CLONE_PARAMS *clone_param = &clone_param_s;
846 dTHXa(thread->interp);
850 #if (PERL_VERSION < 13) || (PERL_VERSION == 13 && PERL_SUBVERSION <= 1)
851 clone_param->flags = 0;
854 /* Here we remove END blocks since they should only run in the thread
857 SvREFCNT_dec(PL_endav);
860 if (SvPOK(init_function)) {
861 thread->init_function = newSV(0);
862 sv_copypv(thread->init_function, init_function);
864 thread->init_function = sv_dup_inc(init_function, clone_param);
867 thread->params = params = newAV();
868 av_extend(params, num_params - 1);
869 AvFILLp(params) = num_params - 1;
870 array = AvARRAY(params);
872 /* params_start is an offset onto the Perl stack. This can be
873 reallocated (and hence move) as a side effect of calls to
874 perl_clone() and sv_dup_inc(). Hence copy the parameters
875 somewhere under our control first, before duplicating. */
876 #if (PERL_VERSION > 8)
877 Copy(parent_perl->Istack_base + params_start, array, num_params, SV *);
879 Copy(parent_perl->Tstack_base + params_start, array, num_params, SV *);
881 while (num_params--) {
882 *array = sv_dup_inc(*array, clone_param);
885 #if (PERL_VERSION > 13) || (PERL_VERSION == 13 && PERL_SUBVERSION > 1)
886 Perl_clone_params_del(clone_param);
889 #if PERL_VERSION <= 8 && PERL_SUBVERSION <= 7
890 /* The code below checks that anything living on the tmps stack and
891 * has been cloned (so it lives in the ptr_table) has a refcount
894 * If the refcount is 0 it means that a something on the stack/context
895 * was holding a reference to it and since we init_stacks() in
896 * perl_clone that won't get cleaned and we will get a leaked scalar.
897 * The reason it was cloned was that it lived on the @_ stack.
899 * Example of this can be found in bugreport 15837 where calls in the
900 * parameter list end up as a temp.
902 * As of 5.8.8 this is done in perl_clone.
904 while (tmps_ix > 0) {
905 SV* sv = (SV*)ptr_table_fetch(PL_ptr_table, tmps_tmp[tmps_ix]);
907 if (sv && SvREFCNT(sv) == 0) {
908 SvREFCNT_inc_void(sv);
914 SvTEMP_off(thread->init_function);
915 ptr_table_free(PL_ptr_table);
917 PL_exit_flags |= PERL_EXIT_DESTRUCT_END;
919 S_ithread_set(aTHX_ current_thread);
920 PERL_SET_CONTEXT(aTHX);
922 /* Create/start the thread */
924 thread->handle = CreateThread(NULL,
925 (DWORD)thread->stack_size,
928 STACK_SIZE_PARAM_IS_A_RESERVATION,
932 STATIC pthread_attr_t attr;
933 STATIC int attr_inited = 0;
934 STATIC int attr_joinable = PTHREAD_CREATE_JOINABLE;
936 pthread_attr_init(&attr);
940 # ifdef PTHREAD_ATTR_SETDETACHSTATE
941 /* Threads start out joinable */
942 PTHREAD_ATTR_SETDETACHSTATE(&attr, attr_joinable);
945 # ifdef _POSIX_THREAD_ATTR_STACKSIZE
946 /* Set thread's stack size */
947 if (thread->stack_size > 0) {
948 rc_stack_size = pthread_attr_setstacksize(&attr, (size_t)thread->stack_size);
952 /* Create the thread */
953 if (! rc_stack_size) {
954 # ifdef OLD_PTHREADS_API
955 rc_thread_create = pthread_create(&thread->thr,
960 # if defined(HAS_PTHREAD_ATTR_SETSCOPE) && defined(PTHREAD_SCOPE_SYSTEM)
961 pthread_attr_setscope(&attr, PTHREAD_SCOPE_SYSTEM);
963 rc_thread_create = pthread_create(&thread->thr,
970 #ifdef THREAD_SIGNAL_BLOCKING
971 /* Now it's safe to accept signals, since we're in our own interpreter's
972 * context and we have created the thread.
974 S_set_sigmask(&thread->initial_sigmask);
977 # ifdef _POSIX_THREAD_ATTR_STACKSIZE
978 /* Try to get thread's actual stack size */
982 stacksize = pthread_attr_getstacksize(attr);
984 if (! pthread_attr_getstacksize(&attr, &stacksize))
987 thread->stack_size = (IV)stacksize;
994 /* Check for errors */
996 if (thread->handle == NULL) {
998 if (rc_stack_size || rc_thread_create) {
1000 /* Must unlock mutex for destruct call */
1001 /* This lock was acquired in ithread_create()
1002 * prior to calling S_ithread_create(). */
1003 MUTEX_UNLOCK(&my_pool->create_destruct_mutex);
1004 thread->state |= PERL_ITHR_NONVIABLE;
1005 S_ithread_free(aTHX_ thread); /* Releases MUTEX */
1007 if (ckWARN_d(WARN_THREADS)) {
1008 if (rc_stack_size) {
1009 Perl_warn(aTHX_ "Thread creation failed: pthread_attr_setstacksize(%" IVdf ") returned %d", thread->stack_size, rc_stack_size);
1011 Perl_warn(aTHX_ "Thread creation failed: pthread_create returned %d", rc_thread_create);
1018 my_pool->running_threads++;
1019 MUTEX_UNLOCK(&my_pool->create_destruct_mutex);
1021 CLANG_DIAG_IGNORE(-Wthread-safety);
1022 /* warning: mutex 'thread->mutex' is not held on every path through here [-Wthread-safety-analysis] */
1026 #endif /* USE_ITHREADS */
1029 MODULE = threads PACKAGE = threads PREFIX = ithread_
1039 SV *function_to_call;
1044 SV *thread_exit_only;
1049 if ((items >= 2) && SvROK(ST(1)) && SvTYPE(SvRV(ST(1)))==SVt_PVHV) {
1051 Perl_croak(aTHX_ "Usage: threads->create(\\%%specs, function, ...)");
1053 specs = (HV*)SvRV(ST(1));
1057 Perl_croak(aTHX_ "Usage: threads->create(function, ...)");
1063 if (sv_isobject(ST(0))) {
1064 /* $thr->create() */
1065 classname = HvNAME(SvSTASH(SvRV(ST(0))));
1066 thread = INT2PTR(ithread *, SvIV(SvRV(ST(0))));
1067 MUTEX_LOCK(&thread->mutex);
1068 stack_size = thread->stack_size;
1069 exit_opt = thread->state & PERL_ITHR_THREAD_EXIT_ONLY;
1070 MUTEX_UNLOCK(&thread->mutex);
1072 /* threads->create() */
1073 classname = (char *)SvPV_nolen(ST(0));
1074 stack_size = MY_POOL.default_stack_size;
1075 thread_exit_only = get_sv("threads::thread_exit_only", GV_ADD);
1076 exit_opt = (SvTRUE(thread_exit_only))
1077 ? PERL_ITHR_THREAD_EXIT_ONLY : 0;
1080 function_to_call = ST(idx+1);
1086 if ((svp = hv_fetch(specs, "stack", 5, 0))) {
1087 stack_size = SvIV(*svp);
1088 } else if ((svp = hv_fetch(specs, "stacksize", 9, 0))) {
1089 stack_size = SvIV(*svp);
1090 } else if ((svp = hv_fetch(specs, "stack_size", 10, 0))) {
1091 stack_size = SvIV(*svp);
1095 if ((svp = hv_fetch(specs, "context", 7, 0))) {
1096 str = (char *)SvPV_nolen(*svp);
1113 Perl_croak(aTHX_ "Invalid context: %s", str);
1115 } else if ((svp = hv_fetch(specs, "array", 5, 0))) {
1119 } else if ((svp = hv_fetch(specs, "list", 4, 0))) {
1123 } else if ((svp = hv_fetch(specs, "scalar", 6, 0))) {
1127 } else if ((svp = hv_fetch(specs, "void", 4, 0))) {
1133 /* exit => thread_only */
1134 if ((svp = hv_fetch(specs, "exit", 4, 0))) {
1135 str = (char *)SvPV_nolen(*svp);
1136 exit_opt = (*str == 't' || *str == 'T')
1137 ? PERL_ITHR_THREAD_EXIT_ONLY : 0;
1140 if (context == -1) {
1141 context = GIMME_V; /* Implicit context */
1143 context |= (GIMME_V & (~(G_ARRAY|G_SCALAR|G_VOID)));
1147 MUTEX_LOCK(&MY_POOL.create_destruct_mutex);
1148 thread = S_ithread_create(aTHX_ &MY_POOL,
1154 items > 2 ? items - 2 : 0);
1156 XSRETURN_UNDEF; /* Mutex already unlocked */
1158 ST(0) = sv_2mortal(S_ithread_to_SV(aTHX_ Nullsv, thread, classname, FALSE));
1160 /* Let thread run. */
1161 /* See S_ithread_run() for more detail. */
1162 CLANG_DIAG_IGNORE(-Wthread-safety);
1163 /* warning: releasing mutex 'thread->mutex' that was not held [-Wthread-safety-analysis] */
1164 MUTEX_UNLOCK(&thread->mutex);
1167 /* XSRETURN(1); - implied */
1177 int want_running = 0;
1181 /* Class method only */
1183 Perl_croak(aTHX_ "Usage: threads->list(...)");
1185 classname = (char *)SvPV_nolen(ST(0));
1187 /* Calling context */
1188 list_context = (GIMME_V == G_ARRAY);
1190 /* Running or joinable parameter */
1192 want_running = SvTRUE(ST(1));
1195 /* Walk through threads list */
1196 MUTEX_LOCK(&MY_POOL.create_destruct_mutex);
1197 for (thread = MY_POOL.main_thread.next;
1198 thread != &MY_POOL.main_thread;
1199 thread = thread->next)
1201 MUTEX_LOCK(&thread->mutex);
1202 state = thread->state;
1203 MUTEX_UNLOCK(&thread->mutex);
1205 /* Ignore detached or joined threads */
1206 if (state & PERL_ITHR_UNCALLABLE) {
1210 /* Filter per parameter */
1213 if (state & PERL_ITHR_FINISHED) {
1214 continue; /* Not running */
1217 if (! (state & PERL_ITHR_FINISHED)) {
1218 continue; /* Still running - not joinable yet */
1223 /* Push object on stack if list context */
1225 XPUSHs(sv_2mortal(S_ithread_to_SV(aTHX_ Nullsv, thread, classname, TRUE)));
1229 MUTEX_UNLOCK(&MY_POOL.create_destruct_mutex);
1230 /* If scalar context, send back count */
1231 if (! list_context) {
1242 /* Class method only */
1243 if ((items != 1) || SvROK(ST(0))) {
1244 Perl_croak(aTHX_ "Usage: threads->self()");
1246 classname = (char *)SvPV_nolen(ST(0));
1248 thread = S_ithread_get(aTHX);
1250 ST(0) = sv_2mortal(S_ithread_to_SV(aTHX_ Nullsv, thread, classname, TRUE));
1251 /* XSRETURN(1); - implied */
1259 PERL_UNUSED_VAR(items);
1260 thread = S_SV_to_ithread(aTHX_ ST(0));
1261 XST_mUV(0, thread->tid);
1262 /* XSRETURN(1); - implied */
1269 ithread *current_thread;
1280 /* Object method only */
1281 if ((items != 1) || ! sv_isobject(ST(0))) {
1282 Perl_croak(aTHX_ "Usage: $thr->join()");
1285 /* Check if the thread is joinable and not ourselves */
1286 thread = S_SV_to_ithread(aTHX_ ST(0));
1287 current_thread = S_ithread_get(aTHX);
1289 MUTEX_LOCK(&thread->mutex);
1290 if ((join_err = (thread->state & PERL_ITHR_UNCALLABLE))) {
1291 MUTEX_UNLOCK(&thread->mutex);
1292 Perl_croak(aTHX_ (join_err & PERL_ITHR_DETACHED)
1293 ? "Cannot join a detached thread"
1294 : "Thread already joined");
1295 } else if (thread->tid == current_thread->tid) {
1296 MUTEX_UNLOCK(&thread->mutex);
1297 Perl_croak(aTHX_ "Cannot join self");
1300 /* Mark as joined */
1301 thread->state |= PERL_ITHR_JOINED;
1302 MUTEX_UNLOCK(&thread->mutex);
1304 MUTEX_LOCK(&MY_POOL.create_destruct_mutex);
1305 MY_POOL.joinable_threads--;
1306 MUTEX_UNLOCK(&MY_POOL.create_destruct_mutex);
1308 /* Join the thread */
1310 if (WaitForSingleObject(thread->handle, INFINITE) != WAIT_OBJECT_0) {
1311 /* Timeout/abandonment unexpected here; check $^E */
1312 Perl_croak(aTHX_ "PANIC: underlying join failed");
1315 if ((rc_join = pthread_join(thread->thr, &retval)) != 0) {
1316 /* In progress/deadlock/unknown unexpected here; check $! */
1318 Perl_croak(aTHX_ "PANIC: underlying join failed");
1322 MUTEX_LOCK(&thread->mutex);
1323 /* Get the return value from the call_sv */
1324 /* Objects do not survive this process - FIXME */
1325 if ((thread->gimme & G_WANT) != G_VOID) {
1326 #if (PERL_VERSION < 13) || (PERL_VERSION == 13 && PERL_SUBVERSION <= 1)
1328 PerlInterpreter *other_perl;
1329 CLONE_PARAMS clone_params;
1331 params_copy = thread->params;
1332 other_perl = thread->interp;
1333 clone_params.stashes = newAV();
1334 clone_params.flags = CLONEf_JOIN_IN;
1335 PL_ptr_table = ptr_table_new();
1336 S_ithread_set(aTHX_ thread);
1337 /* Ensure 'meaningful' addresses retain their meaning */
1338 ptr_table_store(PL_ptr_table, &other_perl->Isv_undef, &PL_sv_undef);
1339 ptr_table_store(PL_ptr_table, &other_perl->Isv_no, &PL_sv_no);
1340 ptr_table_store(PL_ptr_table, &other_perl->Isv_yes, &PL_sv_yes);
1341 params = (AV *)sv_dup((SV*)params_copy, &clone_params);
1342 S_ithread_set(aTHX_ current_thread);
1343 SvREFCNT_dec(clone_params.stashes);
1344 SvREFCNT_inc_void(params);
1345 ptr_table_free(PL_ptr_table);
1346 PL_ptr_table = NULL;
1349 PerlInterpreter *other_perl = thread->interp;
1350 CLONE_PARAMS *clone_params = Perl_clone_params_new(other_perl, aTHX);
1352 params_copy = thread->params;
1353 clone_params->flags |= CLONEf_JOIN_IN;
1354 PL_ptr_table = ptr_table_new();
1355 S_ithread_set(aTHX_ thread);
1356 /* Ensure 'meaningful' addresses retain their meaning */
1357 ptr_table_store(PL_ptr_table, &other_perl->Isv_undef, &PL_sv_undef);
1358 ptr_table_store(PL_ptr_table, &other_perl->Isv_no, &PL_sv_no);
1359 ptr_table_store(PL_ptr_table, &other_perl->Isv_yes, &PL_sv_yes);
1360 params = (AV *)sv_dup((SV*)params_copy, clone_params);
1361 S_ithread_set(aTHX_ current_thread);
1362 Perl_clone_params_del(clone_params);
1363 SvREFCNT_inc_void(params);
1364 ptr_table_free(PL_ptr_table);
1365 PL_ptr_table = NULL;
1369 /* If thread didn't die, then we can free its interpreter */
1370 if (! (thread->state & PERL_ITHR_DIED)) {
1371 S_ithread_clear(aTHX_ thread);
1373 S_ithread_free(aTHX_ thread); /* Releases MUTEX */
1375 /* If no return values, then just return */
1380 /* Put return values on stack */
1381 len = (int)AvFILL(params);
1382 for (ii=0; ii <= len; ii++) {
1383 SV* param = av_shift(params);
1384 XPUSHs(sv_2mortal(param));
1387 /* Free return value array */
1388 SvREFCNT_dec(params);
1394 PERL_UNUSED_VAR(items);
1405 PERL_UNUSED_VAR(items);
1407 /* Detach the thread */
1408 thread = S_SV_to_ithread(aTHX_ ST(0));
1409 MUTEX_LOCK(&MY_POOL.create_destruct_mutex);
1410 MUTEX_LOCK(&thread->mutex);
1411 if (! (detach_err = (thread->state & PERL_ITHR_UNCALLABLE))) {
1412 /* Thread is detachable */
1413 thread->state |= PERL_ITHR_DETACHED;
1415 /* Windows has no 'detach thread' function */
1417 PERL_THREAD_DETACH(thread->thr);
1419 if (thread->state & PERL_ITHR_FINISHED) {
1420 MY_POOL.joinable_threads--;
1422 MY_POOL.running_threads--;
1423 MY_POOL.detached_threads++;
1426 MUTEX_UNLOCK(&thread->mutex);
1427 MUTEX_UNLOCK(&MY_POOL.create_destruct_mutex);
1430 Perl_croak(aTHX_ (detach_err & PERL_ITHR_DETACHED)
1431 ? "Thread already detached"
1432 : "Cannot detach a joined thread");
1435 /* If thread is finished and didn't die,
1436 * then we can free its interpreter */
1437 MUTEX_LOCK(&thread->mutex);
1438 if ((thread->state & PERL_ITHR_FINISHED) &&
1439 ! (thread->state & PERL_ITHR_DIED))
1441 S_ithread_clear(aTHX_ thread);
1443 S_ithread_free(aTHX_ thread); /* Releases MUTEX */
1454 /* Must have safe signals */
1455 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG) {
1456 Perl_croak(aTHX_ "Cannot signal threads without safe signals");
1459 /* Object method only */
1460 if ((items != 2) || ! sv_isobject(ST(0))) {
1461 Perl_croak(aTHX_ "Usage: $thr->kill('SIG...')");
1465 sig_name = SvPV_nolen(ST(1));
1466 if (isALPHA(*sig_name)) {
1467 if (*sig_name == 'S' && sig_name[1] == 'I' && sig_name[2] == 'G') {
1470 if ((signal = whichsig(sig_name)) < 0) {
1471 Perl_croak(aTHX_ "Unrecognized signal name: %s", sig_name);
1474 signal = SvIV(ST(1));
1477 /* Set the signal for the thread */
1478 thread = S_SV_to_ithread(aTHX_ ST(0));
1479 MUTEX_LOCK(&thread->mutex);
1480 if (thread->interp && ! (thread->state & PERL_ITHR_FINISHED)) {
1481 dTHXa(thread->interp);
1482 if (PL_psig_pend && PL_psig_ptr[signal]) {
1483 PL_psig_pend[signal]++;
1488 /* Ignore signal to terminated/finished thread */
1491 MUTEX_UNLOCK(&thread->mutex);
1494 Perl_croak(aTHX_ "Signal %s received in thread %"UVuf", but no signal handler set.", sig_name, thread->tid);
1497 /* Return the thread to allow for method chaining */
1499 /* XSRETURN(1); - implied */
1503 ithread_DESTROY(...)
1505 PERL_UNUSED_VAR(items);
1506 sv_unmagic(SvRV(ST(0)), PERL_MAGIC_shared_scalar);
1514 PERL_UNUSED_VAR(items);
1516 /* Compares TIDs to determine thread equality */
1517 if (sv_isobject(ST(0)) && sv_isobject(ST(1))) {
1518 ithread *thr1 = INT2PTR(ithread *, SvIV(SvRV(ST(0))));
1519 ithread *thr2 = INT2PTR(ithread *, SvIV(SvRV(ST(1))));
1520 are_equal = (thr1->tid == thr2->tid);
1525 /* Return 0 on false for backward compatibility */
1528 /* XSRETURN(1); - implied */
1542 /* Class method only */
1544 Perl_croak(aTHX_ "Usage: threads->object($tid)");
1546 classname = (char *)SvPV_nolen(ST(0));
1548 /* Turn $tid from PVLV to SV if needed (bug #73330) */
1552 if ((items < 2) || ! SvOK(arg)) {
1556 /* threads->object($tid) */
1559 /* If current thread wants its own object, then behave the same as
1561 thread = S_ithread_get(aTHX);
1562 if (thread->tid == tid) {
1563 ST(0) = sv_2mortal(S_ithread_to_SV(aTHX_ Nullsv, thread, classname, TRUE));
1567 /* Walk through threads list */
1568 MUTEX_LOCK(&MY_POOL.create_destruct_mutex);
1569 for (thread = MY_POOL.main_thread.next;
1570 thread != &MY_POOL.main_thread;
1571 thread = thread->next)
1574 if (thread->tid == tid) {
1575 /* Ignore if detached or joined */
1576 MUTEX_LOCK(&thread->mutex);
1577 state = thread->state;
1578 MUTEX_UNLOCK(&thread->mutex);
1579 if (! (state & PERL_ITHR_UNCALLABLE)) {
1580 /* Put object on stack */
1581 ST(0) = sv_2mortal(S_ithread_to_SV(aTHX_ Nullsv, thread, classname, TRUE));
1587 MUTEX_UNLOCK(&MY_POOL.create_destruct_mutex);
1593 /* XSRETURN(1); - implied */
1597 ithread__handle(...);
1601 PERL_UNUSED_VAR(items);
1602 thread = S_SV_to_ithread(aTHX_ ST(0));
1604 XST_mUV(0, PTR2UV(&thread->handle));
1606 XST_mUV(0, PTR2UV(&thread->thr));
1608 /* XSRETURN(1); - implied */
1612 ithread_get_stack_size(...)
1617 PERL_UNUSED_VAR(items);
1618 if (sv_isobject(ST(0))) {
1619 /* $thr->get_stack_size() */
1620 ithread *thread = INT2PTR(ithread *, SvIV(SvRV(ST(0))));
1621 stack_size = thread->stack_size;
1623 /* threads->get_stack_size() */
1624 stack_size = MY_POOL.default_stack_size;
1626 XST_mIV(0, stack_size);
1627 /* XSRETURN(1); - implied */
1631 ithread_set_stack_size(...)
1637 Perl_croak(aTHX_ "Usage: threads->set_stack_size($size)");
1639 if (sv_isobject(ST(0))) {
1640 Perl_croak(aTHX_ "Cannot change stack size of an existing thread");
1642 if (! looks_like_number(ST(1))) {
1643 Perl_croak(aTHX_ "Stack size must be numeric");
1646 old_size = MY_POOL.default_stack_size;
1647 MY_POOL.default_stack_size = S_good_stack_size(aTHX_ SvIV(ST(1)));
1648 XST_mIV(0, old_size);
1649 /* XSRETURN(1); - implied */
1653 ithread_is_running(...)
1657 /* Object method only */
1658 if ((items != 1) || ! sv_isobject(ST(0))) {
1659 Perl_croak(aTHX_ "Usage: $thr->is_running()");
1662 thread = INT2PTR(ithread *, SvIV(SvRV(ST(0))));
1663 MUTEX_LOCK(&thread->mutex);
1664 ST(0) = (thread->state & PERL_ITHR_FINISHED) ? &PL_sv_no : &PL_sv_yes;
1665 MUTEX_UNLOCK(&thread->mutex);
1666 /* XSRETURN(1); - implied */
1670 ithread_is_detached(...)
1674 PERL_UNUSED_VAR(items);
1675 thread = S_SV_to_ithread(aTHX_ ST(0));
1676 MUTEX_LOCK(&thread->mutex);
1677 ST(0) = (thread->state & PERL_ITHR_DETACHED) ? &PL_sv_yes : &PL_sv_no;
1678 MUTEX_UNLOCK(&thread->mutex);
1679 /* XSRETURN(1); - implied */
1683 ithread_is_joinable(...)
1687 /* Object method only */
1688 if ((items != 1) || ! sv_isobject(ST(0))) {
1689 Perl_croak(aTHX_ "Usage: $thr->is_joinable()");
1692 thread = INT2PTR(ithread *, SvIV(SvRV(ST(0))));
1693 MUTEX_LOCK(&thread->mutex);
1694 ST(0) = ((thread->state & PERL_ITHR_FINISHED) &&
1695 ! (thread->state & PERL_ITHR_UNCALLABLE))
1696 ? &PL_sv_yes : &PL_sv_no;
1697 MUTEX_UNLOCK(&thread->mutex);
1698 /* XSRETURN(1); - implied */
1702 ithread_wantarray(...)
1706 PERL_UNUSED_VAR(items);
1707 thread = S_SV_to_ithread(aTHX_ ST(0));
1708 ST(0) = ((thread->gimme & G_WANT) == G_ARRAY) ? &PL_sv_yes :
1709 ((thread->gimme & G_WANT) == G_VOID) ? &PL_sv_undef
1710 /* G_SCALAR */ : &PL_sv_no;
1711 /* XSRETURN(1); - implied */
1715 ithread_set_thread_exit_only(...)
1720 Perl_croak(aTHX_ "Usage: ->set_thread_exit_only(boolean)");
1722 thread = S_SV_to_ithread(aTHX_ ST(0));
1723 MUTEX_LOCK(&thread->mutex);
1724 if (SvTRUE(ST(1))) {
1725 thread->state |= PERL_ITHR_THREAD_EXIT_ONLY;
1727 thread->state &= ~PERL_ITHR_THREAD_EXIT_ONLY;
1729 MUTEX_UNLOCK(&thread->mutex);
1738 /* Object method only */
1739 if ((items != 1) || ! sv_isobject(ST(0))) {
1740 Perl_croak(aTHX_ "Usage: $thr->err()");
1743 thread = INT2PTR(ithread *, SvIV(SvRV(ST(0))));
1744 MUTEX_LOCK(&thread->mutex);
1746 /* If thread died, then clone the error into the calling thread */
1747 if (thread->state & PERL_ITHR_DIED) {
1748 #if (PERL_VERSION < 13) || (PERL_VERSION == 13 && PERL_SUBVERSION <= 1)
1749 PerlInterpreter *other_perl;
1750 CLONE_PARAMS clone_params;
1751 ithread *current_thread;
1753 other_perl = thread->interp;
1754 clone_params.stashes = newAV();
1755 clone_params.flags = CLONEf_JOIN_IN;
1756 PL_ptr_table = ptr_table_new();
1757 current_thread = S_ithread_get(aTHX);
1758 S_ithread_set(aTHX_ thread);
1759 /* Ensure 'meaningful' addresses retain their meaning */
1760 ptr_table_store(PL_ptr_table, &other_perl->Isv_undef, &PL_sv_undef);
1761 ptr_table_store(PL_ptr_table, &other_perl->Isv_no, &PL_sv_no);
1762 ptr_table_store(PL_ptr_table, &other_perl->Isv_yes, &PL_sv_yes);
1763 err = sv_dup(thread->err, &clone_params);
1764 S_ithread_set(aTHX_ current_thread);
1765 SvREFCNT_dec(clone_params.stashes);
1766 SvREFCNT_inc_void(err);
1767 /* If error was an object, bless it into the correct class */
1768 if (thread->err_class) {
1769 sv_bless(err, gv_stashpv(thread->err_class, 1));
1771 ptr_table_free(PL_ptr_table);
1772 PL_ptr_table = NULL;
1774 PerlInterpreter *other_perl = thread->interp;
1775 CLONE_PARAMS *clone_params = Perl_clone_params_new(other_perl, aTHX);
1776 ithread *current_thread;
1778 clone_params->flags |= CLONEf_JOIN_IN;
1779 PL_ptr_table = ptr_table_new();
1780 current_thread = S_ithread_get(aTHX);
1781 S_ithread_set(aTHX_ thread);
1782 /* Ensure 'meaningful' addresses retain their meaning */
1783 ptr_table_store(PL_ptr_table, &other_perl->Isv_undef, &PL_sv_undef);
1784 ptr_table_store(PL_ptr_table, &other_perl->Isv_no, &PL_sv_no);
1785 ptr_table_store(PL_ptr_table, &other_perl->Isv_yes, &PL_sv_yes);
1786 err = sv_dup(thread->err, clone_params);
1787 S_ithread_set(aTHX_ current_thread);
1788 Perl_clone_params_del(clone_params);
1789 SvREFCNT_inc_void(err);
1790 /* If error was an object, bless it into the correct class */
1791 if (thread->err_class) {
1792 sv_bless(err, gv_stashpv(thread->err_class, 1));
1794 ptr_table_free(PL_ptr_table);
1795 PL_ptr_table = NULL;
1799 MUTEX_UNLOCK(&thread->mutex);
1805 ST(0) = sv_2mortal(err);
1806 /* XSRETURN(1); - implied */
1809 #endif /* USE_ITHREADS */
1815 SV *my_pool_sv = *hv_fetch(PL_modglobal, MY_POOL_KEY,
1816 sizeof(MY_POOL_KEY)-1, TRUE);
1817 my_pool_t *my_poolp = (my_pool_t*)SvPVX(newSV(sizeof(my_pool_t)-1));
1821 Zero(my_poolp, 1, my_pool_t);
1822 sv_setuv(my_pool_sv, PTR2UV(my_poolp));
1824 PL_perl_destruct_level = 2;
1825 MUTEX_INIT(&MY_POOL.create_destruct_mutex);
1826 MUTEX_LOCK(&MY_POOL.create_destruct_mutex);
1828 PL_threadhook = &Perl_ithread_hook;
1830 MY_POOL.tid_counter = 1;
1831 # ifdef THREAD_CREATE_NEEDS_STACK
1832 MY_POOL.default_stack_size = THREAD_CREATE_NEEDS_STACK;
1835 /* The 'main' thread is thread 0.
1836 * It is detached (unjoinable) and immortal.
1839 MUTEX_INIT(&MY_POOL.main_thread.mutex);
1841 /* Head of the threads list */
1842 MY_POOL.main_thread.next = &MY_POOL.main_thread;
1843 MY_POOL.main_thread.prev = &MY_POOL.main_thread;
1845 MY_POOL.main_thread.count = 1; /* Immortal */
1847 MY_POOL.main_thread.interp = aTHX;
1848 MY_POOL.main_thread.state = PERL_ITHR_DETACHED; /* Detached */
1849 MY_POOL.main_thread.stack_size = MY_POOL.default_stack_size;
1851 MY_POOL.main_thread.thr = GetCurrentThreadId();
1853 MY_POOL.main_thread.thr = pthread_self();
1856 S_ithread_set(aTHX_ &MY_POOL.main_thread);
1857 MUTEX_UNLOCK(&MY_POOL.create_destruct_mutex);
1858 #endif /* USE_ITHREADS */