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[perl5.git] / dist / threads / threads.xs
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68795e93 1#define PERL_NO_GET_CONTEXT
fa58a56f
S
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
7#endif
68795e93
NIS
8#include "EXTERN.h"
9#include "perl.h"
10#include "XSUB.h"
4dcb9e53
JH
11/* Workaround for XSUB.h bug under WIN32 */
12#ifdef WIN32
13# undef setjmp
fa58a56f 14# if defined(USE_NO_MINGW_SETJMP_TWO_ARGS) || (!defined(__BORLANDC__) && !defined(__MINGW64__))
c608f8c0
JH
15# define setjmp(x) _setjmp(x)
16# endif
4dcb9e53 17#endif
0f1612a7 18#ifdef HAS_PPPORT_H
404aaa48 19# define NEED_PL_signals
0f1612a7 20# define NEED_newRV_noinc
dcefd27c 21# define NEED_sv_2pv_flags
0f1612a7
JH
22# include "ppport.h"
23# include "threads.h"
24#endif
68795e93 25
73e09c8f
JH
26#ifdef USE_ITHREADS
27
68795e93 28#ifdef WIN32
fc04eb16 29# include <windows.h>
514612b7
JH
30 /* Supposed to be in Winbase.h */
31# ifndef STACK_SIZE_PARAM_IS_A_RESERVATION
32# define STACK_SIZE_PARAM_IS_A_RESERVATION 0x00010000
33# endif
fc04eb16 34# include <win32thread.h>
68795e93 35#else
fc04eb16 36# ifdef OS2
5c728af0 37typedef perl_os_thread pthread_t;
fc04eb16
JH
38# else
39# include <pthread.h>
40# endif
41# include <thread.h>
42# define PERL_THREAD_SETSPECIFIC(k,v) pthread_setspecific(k,v)
43# ifdef OLD_PTHREADS_API
44# define PERL_THREAD_DETACH(t) pthread_detach(&(t))
45# else
46# define PERL_THREAD_DETACH(t) pthread_detach((t))
47# endif
467f3f08 48#endif
d305c2c9
JH
49#if !defined(HAS_GETPAGESIZE) && defined(I_SYS_PARAM)
50# include <sys/param.h>
51#endif
68795e93 52
62375a60 53/* Values for 'state' member */
6ebc233e
RGS
54#define PERL_ITHR_DETACHED 1 /* Thread has been detached */
55#define PERL_ITHR_JOINED 2 /* Thread has been joined */
56#define PERL_ITHR_FINISHED 4 /* Thread has finished execution */
6158f8b3 57#define PERL_ITHR_THREAD_EXIT_ONLY 8 /* exit() only exits current thread */
6ebc233e
RGS
58#define PERL_ITHR_NONVIABLE 16 /* Thread creation failed */
59#define PERL_ITHR_DIED 32 /* Thread finished by dying */
6158f8b3
DM
60
61#define PERL_ITHR_UNCALLABLE (PERL_ITHR_DETACHED|PERL_ITHR_JOINED)
62
fc04eb16
JH
63
64typedef struct _ithread {
65 struct _ithread *next; /* Next thread in the list */
66 struct _ithread *prev; /* Prev thread in the list */
67 PerlInterpreter *interp; /* The threads interpreter */
68 UV tid; /* Threads module's thread id */
69 perl_mutex mutex; /* Mutex for updating things in this struct */
6ebc233e 70 int count; /* Reference count. See S_ithread_create. */
fc04eb16
JH
71 int state; /* Detached, joined, finished, etc. */
72 int gimme; /* Context of create */
73 SV *init_function; /* Code to run */
74 SV *params; /* Args to pass function */
68795e93 75#ifdef WIN32
fc04eb16
JH
76 DWORD thr; /* OS's idea if thread id */
77 HANDLE handle; /* OS's waitable handle */
68795e93 78#else
fc04eb16 79 pthread_t thr; /* OS's handle for the thread */
68795e93 80#endif
514612b7 81 IV stack_size;
955c272e
JH
82 SV *err; /* Error from abnormally terminated thread */
83 char *err_class; /* Error object's classname if applicable */
8264cf32 84#ifndef WIN32
b762d866 85 sigset_t initial_sigmask; /* Thread wakes up with signals blocked */
8264cf32 86#endif
68795e93
NIS
87} ithread;
88
fc04eb16 89
5c6ff896 90#define MY_CXT_KEY "threads::_cxt" XS_VERSION
628ab322
DM
91
92typedef struct {
861d5cbe
JH
93 /* Used by Perl interpreter for thread context switching */
94 ithread *context;
628ab322
DM
95} my_cxt_t;
96
97START_MY_CXT
98
68795e93 99
5c6ff896 100#define MY_POOL_KEY "threads::_pool" XS_VERSION
68795e93 101
5c6ff896
JH
102typedef struct {
103 /* Structure for 'main' thread
104 * Also forms the 'base' for the doubly-linked list of threads */
105 ithread main_thread;
106
107 /* Protects the creation and destruction of threads*/
108 perl_mutex create_destruct_mutex;
109
110 UV tid_counter;
111 IV joinable_threads;
112 IV running_threads;
113 IV detached_threads;
e9a908c9 114 IV total_threads;
5c6ff896
JH
115 IV default_stack_size;
116 IV page_size;
117} my_pool_t;
118
119#define dMY_POOL \
120 SV *my_pool_sv = *hv_fetch(PL_modglobal, MY_POOL_KEY, \
121 sizeof(MY_POOL_KEY)-1, TRUE); \
122 my_pool_t *my_poolp = INT2PTR(my_pool_t*, SvUV(my_pool_sv))
123
124#define MY_POOL (*my_poolp)
c05ae023 125
8264cf32 126#ifndef WIN32
b762d866
JW
127/* Block most signals for calling thread, setting the old signal mask to
128 * oldmask, if it is not NULL */
129STATIC int
130S_block_most_signals(sigset_t *oldmask)
131{
132 sigset_t newmask;
133
134 sigfillset(&newmask);
135 /* Don't block certain "important" signals (stolen from mg.c) */
136#ifdef SIGILL
137 sigdelset(&newmask, SIGILL);
138#endif
139#ifdef SIGBUS
140 sigdelset(&newmask, SIGBUS);
141#endif
142#ifdef SIGSEGV
143 sigdelset(&newmask, SIGSEGV);
144#endif
145
8264cf32 146#if defined(VMS)
d2aa556d
CB
147 /* no per-thread blocking available */
148 return sigprocmask(SIG_BLOCK, &newmask, oldmask);
b762d866
JW
149#else
150 return pthread_sigmask(SIG_BLOCK, &newmask, oldmask);
bcbea5d2 151#endif /* VMS */
b762d866
JW
152}
153
154/* Set the signal mask for this thread to newmask */
155STATIC int
156S_set_sigmask(sigset_t *newmask)
157{
8264cf32 158#if defined(VMS)
d2aa556d 159 return sigprocmask(SIG_SETMASK, newmask, NULL);
b762d866
JW
160#else
161 return pthread_sigmask(SIG_SETMASK, newmask, NULL);
bcbea5d2 162#endif /* VMS */
b762d866 163}
bcbea5d2 164#endif /* WIN32 */
c05ae023 165
fc04eb16 166/* Used by Perl interpreter for thread context switching */
861d5cbe 167STATIC void
fc04eb16 168S_ithread_set(pTHX_ ithread *thread)
c05ae023 169{
628ab322 170 dMY_CXT;
861d5cbe 171 MY_CXT.context = thread;
c05ae023
AB
172}
173
861d5cbe 174STATIC ithread *
fc04eb16
JH
175S_ithread_get(pTHX)
176{
628ab322 177 dMY_CXT;
861d5cbe 178 return (MY_CXT.context);
c05ae023
AB
179}
180
181
fc04eb16
JH
182/* Free any data (such as the Perl interpreter) attached to an ithread
183 * structure. This is a bit like undef on SVs, where the SV isn't freed,
6ebc233e
RGS
184 * but the PVX is. Must be called with thread->mutex already locked. Also,
185 * must be called with MY_POOL.create_destruct_mutex unlocked as destruction
186 * of the interpreter can lead to recursive destruction calls that could
187 * lead to a deadlock on that mutex.
2e676467 188 */
861d5cbe 189STATIC void
fc04eb16 190S_ithread_clear(pTHX_ ithread *thread)
2e676467
DM
191{
192 PerlInterpreter *interp;
bcbea5d2 193#ifndef WIN32
b762d866 194 sigset_t origmask;
bcbea5d2 195#endif
fc04eb16 196
adc09a0e 197 assert(((thread->state & PERL_ITHR_FINISHED) &&
8718f9a1 198 (thread->state & PERL_ITHR_UNCALLABLE))
adc09a0e
JH
199 ||
200 (thread->state & PERL_ITHR_NONVIABLE));
2e676467 201
8264cf32 202#ifndef WIN32
b762d866
JW
203 /* We temporarily set the interpreter context to the interpreter being
204 * destroyed. It's in no condition to handle signals while it's being
205 * taken apart.
206 */
207 S_block_most_signals(&origmask);
8264cf32 208#endif
b762d866 209
2e676467
DM
210 interp = thread->interp;
211 if (interp) {
fc04eb16
JH
212 dTHXa(interp);
213
214 PERL_SET_CONTEXT(interp);
215 S_ithread_set(aTHX_ thread);
f2cba68d 216
fc04eb16
JH
217 SvREFCNT_dec(thread->params);
218 thread->params = Nullsv;
2e676467 219
955c272e
JH
220 if (thread->err) {
221 SvREFCNT_dec(thread->err);
222 thread->err = Nullsv;
223 }
224
fc04eb16 225 perl_destruct(interp);
9ca4d7fd 226 perl_free(interp);
fc04eb16 227 thread->interp = NULL;
2e676467 228 }
fc04eb16 229
2e676467 230 PERL_SET_CONTEXT(aTHX);
8264cf32 231#ifndef WIN32
b762d866 232 S_set_sigmask(&origmask);
8264cf32 233#endif
2e676467
DM
234}
235
68795e93 236
6158f8b3
DM
237/* Decrement the refcount of an ithread, and if it reaches zero, free it.
238 * Must be called with the mutex held.
6ebc233e
RGS
239 * On return, mutex is released (or destroyed).
240 */
861d5cbe 241STATIC void
6158f8b3 242S_ithread_free(pTHX_ ithread *thread)
68795e93 243{
385d56e4 244#ifdef WIN32
fc04eb16 245 HANDLE handle;
385d56e4 246#endif
adc09a0e
JH
247 dMY_POOL;
248
6158f8b3
DM
249 if (! (thread->state & PERL_ITHR_NONVIABLE)) {
250 assert(thread->count > 0);
251 if (--thread->count > 0) {
252 MUTEX_UNLOCK(&thread->mutex);
253 return;
254 }
6ebc233e
RGS
255 assert((thread->state & PERL_ITHR_FINISHED) &&
256 (thread->state & PERL_ITHR_UNCALLABLE));
fc04eb16 257 }
adc09a0e 258 MUTEX_UNLOCK(&thread->mutex);
9feacc09 259
fc04eb16
JH
260 /* Main thread (0) is immortal and should never get here */
261 assert(thread->tid != 0);
262
263 /* Remove from circular list of threads */
5c6ff896 264 MUTEX_LOCK(&MY_POOL.create_destruct_mutex);
adc09a0e
JH
265 assert(thread->prev && thread->next);
266 thread->next->prev = thread->prev;
267 thread->prev->next = thread->next;
fc04eb16
JH
268 thread->next = NULL;
269 thread->prev = NULL;
5c6ff896 270 MUTEX_UNLOCK(&MY_POOL.create_destruct_mutex);
c2f2a82b 271
fc04eb16 272 /* Thread is now disowned */
9ca4d7fd 273 MUTEX_LOCK(&thread->mutex);
fc04eb16 274 S_ithread_clear(aTHX_ thread);
385d56e4
JH
275
276#ifdef WIN32
fc04eb16
JH
277 handle = thread->handle;
278 thread->handle = NULL;
385d56e4 279#endif
fc04eb16
JH
280 MUTEX_UNLOCK(&thread->mutex);
281 MUTEX_DESTROY(&thread->mutex);
385d56e4 282
c7667023 283#ifdef WIN32
fea7688c 284 if (handle) {
fc04eb16 285 CloseHandle(handle);
fea7688c 286 }
c7667023 287#endif
385d56e4 288
fc04eb16 289 PerlMemShared_free(thread);
ae3fba3d
DM
290
291 /* total_threads >= 1 is used to veto cleanup by the main thread,
292 * should it happen to exit while other threads still exist.
6ebc233e
RGS
293 * Decrement this as the very last thing in the thread's existence.
294 * Otherwise, MY_POOL and global state such as PL_op_mutex may get
295 * freed while we're still using it.
ae3fba3d
DM
296 */
297 MUTEX_LOCK(&MY_POOL.create_destruct_mutex);
298 MY_POOL.total_threads--;
299 MUTEX_UNLOCK(&MY_POOL.create_destruct_mutex);
68795e93
NIS
300}
301
fc04eb16 302
6158f8b3
DM
303static void
304S_ithread_count_inc(pTHX_ ithread *thread)
305{
306 MUTEX_LOCK(&thread->mutex);
307 thread->count++;
308 MUTEX_UNLOCK(&thread->mutex);
309}
310
311
69a9b4b8 312/* Warn if exiting with any unjoined threads */
861d5cbe 313STATIC int
69a9b4b8 314S_exit_warning(pTHX)
62375a60 315{
e9a908c9 316 int veto_cleanup, warn;
adc09a0e 317 dMY_POOL;
69a9b4b8 318
5c6ff896 319 MUTEX_LOCK(&MY_POOL.create_destruct_mutex);
e9a908c9
DM
320 veto_cleanup = (MY_POOL.total_threads > 0);
321 warn = (MY_POOL.running_threads || MY_POOL.joinable_threads);
5c6ff896 322 MUTEX_UNLOCK(&MY_POOL.create_destruct_mutex);
60bd5ef6 323
e9a908c9 324 if (warn) {
fc04eb16 325 if (ckWARN_d(WARN_THREADS)) {
4dcb9e53
JH
326 Perl_warn(aTHX_ "Perl exited with active threads:\n\t%"
327 IVdf " running and unjoined\n\t%"
328 IVdf " finished and unjoined\n\t%"
329 IVdf " running and detached\n",
5c6ff896
JH
330 MY_POOL.running_threads,
331 MY_POOL.joinable_threads,
332 MY_POOL.detached_threads);
fc04eb16 333 }
62375a60 334 }
69a9b4b8 335
fc04eb16 336 return (veto_cleanup);
62375a60
NIS
337}
338
ae3fba3d 339
6ebc233e
RGS
340/* Called from perl_destruct() in each thread. If it's the main thread,
341 * stop it from freeing everything if there are other threads still running.
342 */
69a9b4b8
RGS
343int
344Perl_ithread_hook(pTHX)
345{
5c6ff896 346 dMY_POOL;
b5c80a23 347 return ((aTHX == MY_POOL.main_thread.interp) ? S_exit_warning(aTHX) : 0);
69a9b4b8
RGS
348}
349
68795e93
NIS
350
351/* MAGIC (in mg.h sense) hooks */
352
353int
354ithread_mg_get(pTHX_ SV *sv, MAGIC *mg)
355{
fc04eb16 356 ithread *thread = (ithread *)mg->mg_ptr;
45977657 357 SvIV_set(sv, PTR2IV(thread));
68795e93 358 SvIOK_on(sv);
fc04eb16 359 return (0);
68795e93
NIS
360}
361
362int
363ithread_mg_free(pTHX_ SV *sv, MAGIC *mg)
364{
f2cba68d 365 ithread *thread = (ithread *)mg->mg_ptr;
68795e93 366 MUTEX_LOCK(&thread->mutex);
6ebc233e 367 S_ithread_free(aTHX_ thread); /* Releases MUTEX */
fc04eb16 368 return (0);
68795e93
NIS
369}
370
371int
372ithread_mg_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *param)
373{
6158f8b3 374 S_ithread_count_inc(aTHX_ (ithread *)mg->mg_ptr);
fc04eb16 375 return (0);
68795e93
NIS
376}
377
378MGVTBL ithread_vtbl = {
fc04eb16
JH
379 ithread_mg_get, /* get */
380 0, /* set */
381 0, /* len */
382 0, /* clear */
383 ithread_mg_free, /* free */
384 0, /* copy */
385 ithread_mg_dup /* dup */
68795e93
NIS
386};
387
47ba8780 388
514612b7 389/* Provided default, minimum and rational stack sizes */
861d5cbe
JH
390STATIC IV
391S_good_stack_size(pTHX_ IV stack_size)
514612b7 392{
5c6ff896
JH
393 dMY_POOL;
394
514612b7 395 /* Use default stack size if no stack size specified */
fea7688c 396 if (! stack_size) {
5c6ff896 397 return (MY_POOL.default_stack_size);
fea7688c 398 }
514612b7
JH
399
400#ifdef PTHREAD_STACK_MIN
401 /* Can't use less than minimum */
402 if (stack_size < PTHREAD_STACK_MIN) {
4dcb9e53 403 if (ckWARN(WARN_THREADS)) {
514612b7
JH
404 Perl_warn(aTHX_ "Using minimum thread stack size of %" IVdf, (IV)PTHREAD_STACK_MIN);
405 }
406 return (PTHREAD_STACK_MIN);
407 }
408#endif
409
410 /* Round up to page size boundary */
5c6ff896 411 if (MY_POOL.page_size <= 0) {
d305c2c9 412#if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
514612b7 413 SETERRNO(0, SS_NORMAL);
d305c2c9 414# ifdef _SC_PAGESIZE
5c6ff896 415 MY_POOL.page_size = sysconf(_SC_PAGESIZE);
d305c2c9 416# else
5c6ff896 417 MY_POOL.page_size = sysconf(_SC_MMAP_PAGE_SIZE);
d305c2c9 418# endif
5c6ff896 419 if ((long)MY_POOL.page_size < 0) {
514612b7 420 if (errno) {
8583b257 421 SV * const error = get_sv("@", 0);
514612b7
JH
422 (void)SvUPGRADE(error, SVt_PV);
423 Perl_croak(aTHX_ "PANIC: sysconf: %s", SvPV_nolen(error));
424 } else {
425 Perl_croak(aTHX_ "PANIC: sysconf: pagesize unknown");
426 }
427 }
d305c2c9
JH
428#else
429# ifdef HAS_GETPAGESIZE
5c6ff896 430 MY_POOL.page_size = getpagesize();
514612b7 431# else
d305c2c9 432# if defined(I_SYS_PARAM) && defined(PAGESIZE)
5c6ff896 433 MY_POOL.page_size = PAGESIZE;
d305c2c9 434# else
5c6ff896 435 MY_POOL.page_size = 8192; /* A conservative default */
d305c2c9 436# endif
514612b7 437# endif
5c6ff896
JH
438 if (MY_POOL.page_size <= 0) {
439 Perl_croak(aTHX_ "PANIC: bad pagesize %" IVdf, (IV)MY_POOL.page_size);
fea7688c 440 }
514612b7
JH
441#endif
442 }
5c6ff896 443 stack_size = ((stack_size + (MY_POOL.page_size - 1)) / MY_POOL.page_size) * MY_POOL.page_size;
514612b7
JH
444
445 return (stack_size);
446}
447
448
fc04eb16
JH
449/* Starts executing the thread.
450 * Passed as the C level function to run in the new thread.
b1edfb69 451 */
47ba8780 452#ifdef WIN32
861d5cbe 453STATIC THREAD_RET_TYPE
fc04eb16 454S_ithread_run(LPVOID arg)
47ba8780 455#else
861d5cbe 456STATIC void *
fc04eb16 457S_ithread_run(void * arg)
47ba8780 458#endif
fc04eb16
JH
459{
460 ithread *thread = (ithread *)arg;
69a9b4b8
RGS
461 int jmp_rc = 0;
462 I32 oldscope;
955c272e 463 int exit_app = 0; /* Thread terminated using 'exit' */
69a9b4b8 464 int exit_code = 0;
955c272e 465 int died = 0; /* Thread terminated abnormally */
f2cba68d 466
69a9b4b8
RGS
467 dJMPENV;
468
fc04eb16 469 dTHXa(thread->interp);
47ba8780 470
5c6ff896
JH
471 dMY_POOL;
472
9ca4d7fd 473 /* Blocked until ->create() call finishes */
fc04eb16 474 MUTEX_LOCK(&thread->mutex);
fc04eb16 475 MUTEX_UNLOCK(&thread->mutex);
9ca4d7fd
JH
476
477 PERL_SET_CONTEXT(thread->interp);
478 S_ithread_set(aTHX_ thread);
47ba8780 479
8264cf32 480#ifndef WIN32
b762d866
JW
481 /* Thread starts with most signals blocked - restore the signal mask from
482 * the ithread struct.
483 */
484 S_set_sigmask(&thread->initial_sigmask);
8264cf32 485#endif
b762d866 486
fc04eb16 487 PL_perl_destruct_level = 2;
f2cba68d 488
fc04eb16
JH
489 {
490 AV *params = (AV *)SvRV(thread->params);
491 int len = (int)av_len(params)+1;
492 int ii;
493
494 dSP;
495 ENTER;
496 SAVETMPS;
497
498 /* Put args on the stack */
499 PUSHMARK(SP);
500 for (ii=0; ii < len; ii++) {
501 XPUSHs(av_shift(params));
502 }
503 PUTBACK;
504
4dcb9e53
JH
505 oldscope = PL_scopestack_ix;
506 JMPENV_PUSH(jmp_rc);
507 if (jmp_rc == 0) {
508 /* Run the specified function */
509 len = (int)call_sv(thread->init_function, thread->gimme|G_EVAL);
510 } else if (jmp_rc == 2) {
69a9b4b8
RGS
511 /* Thread exited */
512 exit_app = 1;
513 exit_code = STATUS_CURRENT;
4dcb9e53
JH
514 while (PL_scopestack_ix > oldscope) {
515 LEAVE;
516 }
517 }
518 JMPENV_POP;
fc04eb16 519
8264cf32 520#ifndef WIN32
b762d866
JW
521 /* The interpreter is finished, so this thread can stop receiving
522 * signals. This way, our signal handler doesn't get called in the
523 * middle of our parent thread calling perl_destruct()...
524 */
525 S_block_most_signals(NULL);
8264cf32 526#endif
b762d866 527
fc04eb16
JH
528 /* Remove args from stack and put back in params array */
529 SPAGAIN;
530 for (ii=len-1; ii >= 0; ii--) {
531 SV *sv = POPs;
7df0357e 532 if (jmp_rc == 0 && (thread->gimme & G_WANT) != G_VOID) {
4dcb9e53
JH
533 av_store(params, ii, SvREFCNT_inc(sv));
534 }
fc04eb16
JH
535 }
536
4dcb9e53
JH
537 FREETMPS;
538 LEAVE;
539
955c272e
JH
540 /* Check for abnormal termination */
541 if (SvTRUE(ERRSV)) {
542 died = PERL_ITHR_DIED;
543 thread->err = newSVsv(ERRSV);
544 /* If ERRSV is an object, remember the classname and then
545 * rebless into 'main' so it will survive 'cloning'
546 */
547 if (sv_isobject(thread->err)) {
548 thread->err_class = HvNAME(SvSTASH(SvRV(thread->err)));
549 sv_bless(thread->err, gv_stashpv("main", 0));
550 }
551
552 if (ckWARN_d(WARN_THREADS)) {
553 oldscope = PL_scopestack_ix;
554 JMPENV_PUSH(jmp_rc);
555 if (jmp_rc == 0) {
556 /* Warn that thread died */
557 Perl_warn(aTHX_ "Thread %" UVuf " terminated abnormally: %" SVf, thread->tid, ERRSV);
558 } else if (jmp_rc == 2) {
559 /* Warn handler exited */
560 exit_app = 1;
561 exit_code = STATUS_CURRENT;
562 while (PL_scopestack_ix > oldscope) {
563 LEAVE;
564 }
4dcb9e53 565 }
955c272e 566 JMPENV_POP;
4dcb9e53 567 }
fc04eb16
JH
568 }
569
fc04eb16
JH
570 /* Release function ref */
571 SvREFCNT_dec(thread->init_function);
572 thread->init_function = Nullsv;
573 }
62375a60 574
fc04eb16
JH
575 PerlIO_flush((PerlIO *)NULL);
576
5c6ff896 577 MUTEX_LOCK(&MY_POOL.create_destruct_mutex);
fc04eb16
JH
578 MUTEX_LOCK(&thread->mutex);
579 /* Mark as finished */
955c272e 580 thread->state |= (PERL_ITHR_FINISHED | died);
69a9b4b8 581 /* Clear exit flag if required */
fea7688c 582 if (thread->state & PERL_ITHR_THREAD_EXIT_ONLY) {
69a9b4b8 583 exit_app = 0;
fea7688c 584 }
fc04eb16 585
69a9b4b8 586 /* Adjust thread status counts */
adc09a0e 587 if (thread->state & PERL_ITHR_DETACHED) {
5c6ff896 588 MY_POOL.detached_threads--;
4dcb9e53 589 } else {
5c6ff896
JH
590 MY_POOL.running_threads--;
591 MY_POOL.joinable_threads++;
5168baf3 592 }
adc09a0e 593 MUTEX_UNLOCK(&thread->mutex);
5c6ff896 594 MUTEX_UNLOCK(&MY_POOL.create_destruct_mutex);
69a9b4b8
RGS
595
596 /* Exit application if required */
597 if (exit_app) {
598 oldscope = PL_scopestack_ix;
599 JMPENV_PUSH(jmp_rc);
600 if (jmp_rc == 0) {
601 /* Warn if there are unjoined threads */
602 S_exit_warning(aTHX);
603 } else if (jmp_rc == 2) {
604 /* Warn handler exited */
605 exit_code = STATUS_CURRENT;
606 while (PL_scopestack_ix > oldscope) {
607 LEAVE;
608 }
609 }
610 JMPENV_POP;
611
612 my_exit(exit_code);
613 }
614
6ebc233e
RGS
615 /* At this point, the interpreter may have been freed, so call
616 * free in the the context of of the 'main' interpreter which
617 * can't have been freed due to the veto_cleanup mechanism.
618 */
46c5d8f1
DM
619 aTHX = MY_POOL.main_thread.interp;
620
6158f8b3 621 MUTEX_LOCK(&thread->mutex);
6ebc233e 622 S_ithread_free(aTHX_ thread); /* Releases MUTEX */
91604d21 623
47ba8780 624#ifdef WIN32
fc04eb16 625 return ((DWORD)0);
e8f2bb9a 626#else
fc04eb16 627 return (0);
47ba8780 628#endif
68795e93
NIS
629}
630
fc04eb16
JH
631
632/* Type conversion helper functions */
fea7688c 633
861d5cbe
JH
634STATIC SV *
635S_ithread_to_SV(pTHX_ SV *obj, ithread *thread, char *classname, bool inc)
68795e93
NIS
636{
637 SV *sv;
638 MAGIC *mg;
fc04eb16 639
6158f8b3
DM
640 if (inc)
641 S_ithread_count_inc(aTHX_ thread);
fc04eb16
JH
642
643 if (! obj) {
644 obj = newSV(0);
68795e93 645 }
fc04eb16
JH
646
647 sv = newSVrv(obj, classname);
648 sv_setiv(sv, PTR2IV(thread));
649 mg = sv_magicext(sv, Nullsv, PERL_MAGIC_shared_scalar, &ithread_vtbl, (char *)thread, 0);
68795e93
NIS
650 mg->mg_flags |= MGf_DUP;
651 SvREADONLY_on(sv);
fc04eb16
JH
652
653 return (obj);
68795e93 654}
47ba8780 655
861d5cbe
JH
656STATIC ithread *
657S_SV_to_ithread(pTHX_ SV *sv)
68795e93 658{
fc04eb16
JH
659 /* Argument is a thread */
660 if (SvROK(sv)) {
661 return (INT2PTR(ithread *, SvIV(SvRV(sv))));
662 }
663 /* Argument is classname, therefore return current thread */
664 return (S_ithread_get(aTHX));
47ba8780
AB
665}
666
47ba8780 667
fc04eb16
JH
668/* threads->create()
669 * Called in context of parent thread.
5c6ff896 670 * Called with MY_POOL.create_destruct_mutex locked. (Unlocked on error.)
fc04eb16 671 */
861d5cbe 672STATIC ithread *
fc04eb16 673S_ithread_create(
9ca4d7fd 674 pTHX_ SV *init_function,
514612b7 675 IV stack_size,
9d9ff5b1 676 int gimme,
69a9b4b8 677 int exit_opt,
fc04eb16 678 SV *params)
68795e93 679{
fc04eb16 680 ithread *thread;
fc04eb16 681 ithread *current_thread = S_ithread_get(aTHX);
3b1c3273 682
24855dff 683#if PERL_VERSION <= 8 && PERL_SUBVERSION <= 7
fc04eb16
JH
684 SV **tmps_tmp = PL_tmps_stack;
685 IV tmps_ix = PL_tmps_ix;
24855dff 686#endif
d94006e8 687#ifndef WIN32
fc04eb16
JH
688 int rc_stack_size = 0;
689 int rc_thread_create = 0;
d94006e8 690#endif
adc09a0e 691 dMY_POOL;
3b1c3273 692
adc09a0e 693 /* Allocate thread structure in context of the main thread's interpreter */
5c6ff896
JH
694 {
695 PERL_SET_CONTEXT(MY_POOL.main_thread.interp);
696 thread = (ithread *)PerlMemShared_malloc(sizeof(ithread));
697 }
698 PERL_SET_CONTEXT(aTHX);
fc04eb16 699 if (!thread) {
5c6ff896 700 MUTEX_UNLOCK(&MY_POOL.create_destruct_mutex);
fc04eb16
JH
701 PerlLIO_write(PerlIO_fileno(Perl_error_log), PL_no_mem, strlen(PL_no_mem));
702 my_exit(1);
703 }
704 Zero(thread, 1, ithread);
705
706 /* Add to threads list */
5c6ff896
JH
707 thread->next = &MY_POOL.main_thread;
708 thread->prev = MY_POOL.main_thread.prev;
709 MY_POOL.main_thread.prev = thread;
fc04eb16 710 thread->prev->next = thread;
e9a908c9 711 MY_POOL.total_threads++;
c05ae023 712
6ebc233e 713 /* 1 ref to be held by the local var 'thread' in S_ithread_run().
6158f8b3 714 * 1 ref to be held by the threads object that we assume we will
6ebc233e
RGS
715 * be embedded in upon our return.
716 * 1 ref to be the responsibility of join/detach, so we don't get
717 * freed until join/detach, even if no thread objects remain.
718 * This allows the following to work:
878090d5 719 * { threads->create(sub{...}); } threads->object(1)->join;
fc04eb16 720 */
6158f8b3 721 thread->count = 3;
fc04eb16 722
9ca4d7fd 723 /* Block new thread until ->create() call finishes */
fc04eb16 724 MUTEX_INIT(&thread->mutex);
9ca4d7fd
JH
725 MUTEX_LOCK(&thread->mutex);
726
5c6ff896 727 thread->tid = MY_POOL.tid_counter++;
861d5cbe 728 thread->stack_size = S_good_stack_size(aTHX_ stack_size);
9d9ff5b1 729 thread->gimme = gimme;
69a9b4b8 730 thread->state = exit_opt;
fc04eb16
JH
731
732 /* "Clone" our interpreter into the thread's interpreter.
733 * This gives thread access to "static data" and code.
734 */
735 PerlIO_flush((PerlIO *)NULL);
736 S_ithread_set(aTHX_ thread);
737
738 SAVEBOOL(PL_srand_called); /* Save this so it becomes the correct value */
739 PL_srand_called = FALSE; /* Set it to false so we can detect if it gets
740 set during the clone */
3b1c3273 741
8264cf32 742#ifndef WIN32
b762d866
JW
743 /* perl_clone() will leave us the new interpreter's context. This poses
744 * two problems for our signal handler. First, it sets the new context
745 * before the new interpreter struct is fully initialized, so our signal
746 * handler might find bogus data in the interpreter struct it gets.
747 * Second, even if the interpreter is initialized before a signal comes in,
748 * we would like to avoid that interpreter receiving notifications for
749 * signals (especially when they ought to be for the one running in this
750 * thread), until it is running in its own thread. Another problem is that
751 * the new thread will not have set the context until some time after it
752 * has started, so it won't be safe for our signal handler to run until
753 * that time.
754 *
755 * So we block most signals here, so the new thread will inherit the signal
756 * mask, and unblock them right after the thread creation. The original
757 * mask is saved in the thread struct so that the new thread can restore
758 * the original mask.
759 */
760 S_block_most_signals(&thread->initial_sigmask);
8264cf32 761#endif
b762d866 762
47ba8780 763#ifdef WIN32
fc04eb16 764 thread->interp = perl_clone(aTHX, CLONEf_KEEP_PTR_TABLE | CLONEf_CLONE_HOST);
47ba8780 765#else
fc04eb16 766 thread->interp = perl_clone(aTHX, CLONEf_KEEP_PTR_TABLE);
47ba8780 767#endif
47ba8780 768
fc04eb16
JH
769 /* perl_clone() leaves us in new interpreter's context. As it is tricky
770 * to spot an implicit aTHX, create a new scope with aTHX matching the
771 * context for the duration of our work for new interpreter.
772 */
773 {
894eec8b
JH
774 CLONE_PARAMS clone_param;
775
fc04eb16
JH
776 dTHXa(thread->interp);
777
778 MY_CXT_CLONE;
779
780 /* Here we remove END blocks since they should only run in the thread
781 * they are created
782 */
783 SvREFCNT_dec(PL_endav);
784 PL_endav = newAV();
404aaa48 785
894eec8b 786 clone_param.flags = 0;
f2e0bb91
JH
787 if (SvPOK(init_function)) {
788 thread->init_function = newSV(0);
789 sv_copypv(thread->init_function, init_function);
790 } else {
dd5ef8e0 791 thread->init_function =
24855dff 792 SvREFCNT_inc(sv_dup(init_function, &clone_param));
fc04eb16
JH
793 }
794
795 thread->params = sv_dup(params, &clone_param);
d4315dd6 796 SvREFCNT_inc_void(thread->params);
fc04eb16 797
24855dff 798#if PERL_VERSION <= 8 && PERL_SUBVERSION <= 7
fc04eb16
JH
799 /* The code below checks that anything living on the tmps stack and
800 * has been cloned (so it lives in the ptr_table) has a refcount
801 * higher than 0.
802 *
803 * If the refcount is 0 it means that a something on the stack/context
804 * was holding a reference to it and since we init_stacks() in
805 * perl_clone that won't get cleaned and we will get a leaked scalar.
806 * The reason it was cloned was that it lived on the @_ stack.
807 *
808 * Example of this can be found in bugreport 15837 where calls in the
809 * parameter list end up as a temp.
810 *
24855dff 811 * As of 5.8.8 this is done in perl_clone.
fc04eb16
JH
812 */
813 while (tmps_ix > 0) {
814 SV* sv = (SV*)ptr_table_fetch(PL_ptr_table, tmps_tmp[tmps_ix]);
815 tmps_ix--;
816 if (sv && SvREFCNT(sv) == 0) {
d4315dd6 817 SvREFCNT_inc_void(sv);
fc04eb16
JH
818 SvREFCNT_dec(sv);
819 }
820 }
24855dff 821#endif
fc04eb16
JH
822
823 SvTEMP_off(thread->init_function);
824 ptr_table_free(PL_ptr_table);
825 PL_ptr_table = NULL;
826 PL_exit_flags |= PERL_EXIT_DESTRUCT_END;
827 }
828 S_ithread_set(aTHX_ current_thread);
829 PERL_SET_CONTEXT(aTHX);
830
831 /* Create/start the thread */
47ba8780 832#ifdef WIN32
fc04eb16 833 thread->handle = CreateThread(NULL,
514612b7 834 (DWORD)thread->stack_size,
fc04eb16
JH
835 S_ithread_run,
836 (LPVOID)thread,
514612b7 837 STACK_SIZE_PARAM_IS_A_RESERVATION,
fc04eb16 838 &thread->thr);
82c40bf6 839#else
fc04eb16 840 {
861d5cbe
JH
841 STATIC pthread_attr_t attr;
842 STATIC int attr_inited = 0;
843 STATIC int attr_joinable = PTHREAD_CREATE_JOINABLE;
fc04eb16
JH
844 if (! attr_inited) {
845 pthread_attr_init(&attr);
846 attr_inited = 1;
847 }
848
fa26028c 849# ifdef PTHREAD_ATTR_SETDETACHSTATE
fc04eb16
JH
850 /* Threads start out joinable */
851 PTHREAD_ATTR_SETDETACHSTATE(&attr, attr_joinable);
fa26028c 852# endif
fc04eb16 853
514612b7 854# ifdef _POSIX_THREAD_ATTR_STACKSIZE
fc04eb16 855 /* Set thread's stack size */
514612b7
JH
856 if (thread->stack_size > 0) {
857 rc_stack_size = pthread_attr_setstacksize(&attr, (size_t)thread->stack_size);
858 }
3eb37d38
AB
859# endif
860
fc04eb16
JH
861 /* Create the thread */
862 if (! rc_stack_size) {
863# ifdef OLD_PTHREADS_API
864 rc_thread_create = pthread_create(&thread->thr,
865 attr,
866 S_ithread_run,
867 (void *)thread);
868# else
869# if defined(HAS_PTHREAD_ATTR_SETSCOPE) && defined(PTHREAD_SCOPE_SYSTEM)
870 pthread_attr_setscope(&attr, PTHREAD_SCOPE_SYSTEM);
871# endif
872 rc_thread_create = pthread_create(&thread->thr,
873 &attr,
874 S_ithread_run,
875 (void *)thread);
19a077f6 876# endif
fc04eb16 877 }
514612b7 878
8264cf32 879#ifndef WIN32
b762d866
JW
880 /* Now it's safe to accept signals, since we're in our own interpreter's
881 * context and we have created the thread.
882 */
883 S_set_sigmask(&thread->initial_sigmask);
8264cf32 884#endif
b762d866 885
514612b7
JH
886# ifdef _POSIX_THREAD_ATTR_STACKSIZE
887 /* Try to get thread's actual stack size */
888 {
889 size_t stacksize;
58a3a76c
JH
890#ifdef HPUX1020
891 stacksize = pthread_attr_getstacksize(attr);
892#else
893 if (! pthread_attr_getstacksize(&attr, &stacksize))
894#endif
895 if (stacksize > 0) {
514612b7
JH
896 thread->stack_size = (IV)stacksize;
897 }
514612b7
JH
898 }
899# endif
fc04eb16 900 }
82c40bf6 901#endif
bcd9ca9b 902
fc04eb16 903 /* Check for errors */
d94006e8 904#ifdef WIN32
fc04eb16 905 if (thread->handle == NULL) {
d94006e8 906#else
fc04eb16 907 if (rc_stack_size || rc_thread_create) {
d94006e8 908#endif
9ca4d7fd 909 /* Must unlock mutex for destruct call */
5c6ff896 910 MUTEX_UNLOCK(&MY_POOL.create_destruct_mutex);
fc04eb16 911 sv_2mortal(params);
adc09a0e 912 thread->state |= PERL_ITHR_NONVIABLE;
6ebc233e 913 S_ithread_free(aTHX_ thread); /* Releases MUTEX */
d94006e8 914#ifndef WIN32
514612b7 915 if (ckWARN_d(WARN_THREADS)) {
fea7688c 916 if (rc_stack_size) {
514612b7 917 Perl_warn(aTHX_ "Thread creation failed: pthread_attr_setstacksize(%" IVdf ") returned %d", thread->stack_size, rc_stack_size);
fea7688c 918 } else {
514612b7 919 Perl_warn(aTHX_ "Thread creation failed: pthread_create returned %d", rc_thread_create);
fea7688c 920 }
514612b7 921 }
d94006e8 922#endif
9ca4d7fd 923 return (NULL);
fc04eb16
JH
924 }
925
5c6ff896 926 MY_POOL.running_threads++;
fc04eb16 927 sv_2mortal(params);
9ca4d7fd 928 return (thread);
68795e93 929}
47ba8780 930
73e09c8f 931#endif /* USE_ITHREADS */
e1c44605 932
fcea4b7c 933
fc04eb16 934MODULE = threads PACKAGE = threads PREFIX = ithread_
68795e93 935PROTOTYPES: DISABLE
8222d950 936
73e09c8f
JH
937#ifdef USE_ITHREADS
938
68795e93 939void
f4cc38af
JH
940ithread_create(...)
941 PREINIT:
942 char *classname;
514612b7 943 ithread *thread;
f4cc38af
JH
944 SV *function_to_call;
945 AV *params;
514612b7
JH
946 HV *specs;
947 IV stack_size;
9d9ff5b1 948 int context;
69a9b4b8
RGS
949 int exit_opt;
950 SV *thread_exit_only;
9d9ff5b1 951 char *str;
514612b7 952 int idx;
f4cc38af 953 int ii;
5c6ff896 954 dMY_POOL;
f4cc38af 955 CODE:
514612b7 956 if ((items >= 2) && SvROK(ST(1)) && SvTYPE(SvRV(ST(1)))==SVt_PVHV) {
fea7688c 957 if (--items < 2) {
18b9e6f5 958 Perl_croak(aTHX_ "Usage: threads->create(\\%%specs, function, ...)");
fea7688c 959 }
514612b7
JH
960 specs = (HV*)SvRV(ST(1));
961 idx = 1;
962 } else {
fea7688c 963 if (items < 2) {
514612b7 964 Perl_croak(aTHX_ "Usage: threads->create(function, ...)");
fea7688c 965 }
514612b7
JH
966 specs = NULL;
967 idx = 0;
968 }
f4cc38af 969
514612b7
JH
970 if (sv_isobject(ST(0))) {
971 /* $thr->create() */
972 classname = HvNAME(SvSTASH(SvRV(ST(0))));
973 thread = INT2PTR(ithread *, SvIV(SvRV(ST(0))));
8718f9a1 974 MUTEX_LOCK(&thread->mutex);
514612b7 975 stack_size = thread->stack_size;
69a9b4b8 976 exit_opt = thread->state & PERL_ITHR_THREAD_EXIT_ONLY;
8718f9a1 977 MUTEX_UNLOCK(&thread->mutex);
514612b7
JH
978 } else {
979 /* threads->create() */
980 classname = (char *)SvPV_nolen(ST(0));
5c6ff896 981 stack_size = MY_POOL.default_stack_size;
8583b257 982 thread_exit_only = get_sv("threads::thread_exit_only", GV_ADD);
69a9b4b8
RGS
983 exit_opt = (SvTRUE(thread_exit_only))
984 ? PERL_ITHR_THREAD_EXIT_ONLY : 0;
514612b7
JH
985 }
986
987 function_to_call = ST(idx+1);
988
9d9ff5b1 989 context = -1;
514612b7
JH
990 if (specs) {
991 /* stack_size */
992 if (hv_exists(specs, "stack", 5)) {
993 stack_size = SvIV(*hv_fetch(specs, "stack", 5, 0));
994 } else if (hv_exists(specs, "stacksize", 9)) {
995 stack_size = SvIV(*hv_fetch(specs, "stacksize", 9, 0));
996 } else if (hv_exists(specs, "stack_size", 10)) {
997 stack_size = SvIV(*hv_fetch(specs, "stack_size", 10, 0));
998 }
9d9ff5b1
JH
999
1000 /* context */
1001 if (hv_exists(specs, "context", 7)) {
1002 str = (char *)SvPV_nolen(*hv_fetch(specs, "context", 7, 0));
1003 switch (*str) {
1004 case 'a':
1005 case 'A':
da140a40
JH
1006 case 'l':
1007 case 'L':
9d9ff5b1
JH
1008 context = G_ARRAY;
1009 break;
1010 case 's':
1011 case 'S':
1012 context = G_SCALAR;
1013 break;
1014 case 'v':
1015 case 'V':
1016 context = G_VOID;
1017 break;
1018 default:
1019 Perl_croak(aTHX_ "Invalid context: %s", str);
1020 }
1021 } else if (hv_exists(specs, "array", 5)) {
1022 if (SvTRUE(*hv_fetch(specs, "array", 5, 0))) {
1023 context = G_ARRAY;
1024 }
da140a40
JH
1025 } else if (hv_exists(specs, "list", 4)) {
1026 if (SvTRUE(*hv_fetch(specs, "list", 4, 0))) {
1027 context = G_ARRAY;
1028 }
9d9ff5b1
JH
1029 } else if (hv_exists(specs, "scalar", 6)) {
1030 if (SvTRUE(*hv_fetch(specs, "scalar", 6, 0))) {
1031 context = G_SCALAR;
1032 }
1033 } else if (hv_exists(specs, "void", 4)) {
1034 if (SvTRUE(*hv_fetch(specs, "void", 4, 0))) {
1035 context = G_VOID;
1036 }
1037 }
69a9b4b8
RGS
1038
1039 /* exit => thread_only */
1040 if (hv_exists(specs, "exit", 4)) {
1041 str = (char *)SvPV_nolen(*hv_fetch(specs, "exit", 4, 0));
1042 exit_opt = (*str == 't' || *str == 'T')
1043 ? PERL_ITHR_THREAD_EXIT_ONLY : 0;
1044 }
9d9ff5b1
JH
1045 }
1046 if (context == -1) {
1047 context = GIMME_V; /* Implicit context */
1048 } else {
1049 context |= (GIMME_V & (~(G_ARRAY|G_SCALAR|G_VOID)));
514612b7 1050 }
f4cc38af
JH
1051
1052 /* Function args */
1053 params = newAV();
1054 if (items > 2) {
514612b7
JH
1055 for (ii=2; ii < items ; ii++) {
1056 av_push(params, SvREFCNT_inc(ST(idx+ii)));
f4cc38af
JH
1057 }
1058 }
1059
1060 /* Create thread */
5c6ff896 1061 MUTEX_LOCK(&MY_POOL.create_destruct_mutex);
9ca4d7fd
JH
1062 thread = S_ithread_create(aTHX_ function_to_call,
1063 stack_size,
1064 context,
1065 exit_opt,
1066 newRV_noinc((SV*)params));
1067 if (! thread) {
1068 XSRETURN_UNDEF; /* Mutex already unlocked */
1069 }
861d5cbe 1070 ST(0) = sv_2mortal(S_ithread_to_SV(aTHX_ Nullsv, thread, classname, FALSE));
adc09a0e 1071 MUTEX_UNLOCK(&MY_POOL.create_destruct_mutex);
9ca4d7fd
JH
1072
1073 /* Let thread run */
1074 MUTEX_UNLOCK(&thread->mutex);
9ca4d7fd 1075
f4cc38af
JH
1076 /* XSRETURN(1); - implied */
1077
8222d950 1078
68795e93 1079void
f4cc38af
JH
1080ithread_list(...)
1081 PREINIT:
1082 char *classname;
fc04eb16 1083 ithread *thread;
f4cc38af
JH
1084 int list_context;
1085 IV count = 0;
11db694d 1086 int want_running = 0;
8718f9a1 1087 int state;
5c6ff896 1088 dMY_POOL;
f4cc38af
JH
1089 PPCODE:
1090 /* Class method only */
fea7688c 1091 if (SvROK(ST(0))) {
ead32952 1092 Perl_croak(aTHX_ "Usage: threads->list(...)");
fea7688c 1093 }
f4cc38af
JH
1094 classname = (char *)SvPV_nolen(ST(0));
1095
1096 /* Calling context */
1097 list_context = (GIMME_V == G_ARRAY);
1098
ead32952
JH
1099 /* Running or joinable parameter */
1100 if (items > 1) {
1101 want_running = SvTRUE(ST(1));
1102 }
1103
f4cc38af 1104 /* Walk through threads list */
5c6ff896
JH
1105 MUTEX_LOCK(&MY_POOL.create_destruct_mutex);
1106 for (thread = MY_POOL.main_thread.next;
1107 thread != &MY_POOL.main_thread;
fc04eb16 1108 thread = thread->next)
f4cc38af 1109 {
8718f9a1
JH
1110 MUTEX_LOCK(&thread->mutex);
1111 state = thread->state;
1112 MUTEX_UNLOCK(&thread->mutex);
1113
f4cc38af 1114 /* Ignore detached or joined threads */
8718f9a1 1115 if (state & PERL_ITHR_UNCALLABLE) {
f4cc38af
JH
1116 continue;
1117 }
ead32952
JH
1118
1119 /* Filter per parameter */
1120 if (items > 1) {
1121 if (want_running) {
8718f9a1 1122 if (state & PERL_ITHR_FINISHED) {
ead32952
JH
1123 continue; /* Not running */
1124 }
1125 } else {
8718f9a1 1126 if (! (state & PERL_ITHR_FINISHED)) {
ead32952
JH
1127 continue; /* Still running - not joinable yet */
1128 }
1129 }
1130 }
1131
f4cc38af
JH
1132 /* Push object on stack if list context */
1133 if (list_context) {
861d5cbe 1134 XPUSHs(sv_2mortal(S_ithread_to_SV(aTHX_ Nullsv, thread, classname, TRUE)));
f4cc38af
JH
1135 }
1136 count++;
1137 }
5c6ff896 1138 MUTEX_UNLOCK(&MY_POOL.create_destruct_mutex);
f4cc38af
JH
1139 /* If scalar context, send back count */
1140 if (! list_context) {
1141 XSRETURN_IV(count);
1142 }
678a9b6c
AB
1143
1144
1145void
f4cc38af
JH
1146ithread_self(...)
1147 PREINIT:
1148 char *classname;
fcea4b7c 1149 ithread *thread;
f4cc38af
JH
1150 CODE:
1151 /* Class method only */
11db694d 1152 if ((items != 1) || SvROK(ST(0))) {
f4cc38af 1153 Perl_croak(aTHX_ "Usage: threads->self()");
fea7688c 1154 }
f4cc38af
JH
1155 classname = (char *)SvPV_nolen(ST(0));
1156
fcea4b7c
JH
1157 thread = S_ithread_get(aTHX);
1158
861d5cbe 1159 ST(0) = sv_2mortal(S_ithread_to_SV(aTHX_ Nullsv, thread, classname, TRUE));
f4cc38af 1160 /* XSRETURN(1); - implied */
47ba8780 1161
47ba8780
AB
1162
1163void
f4cc38af
JH
1164ithread_tid(...)
1165 PREINIT:
1166 ithread *thread;
1167 CODE:
11db694d 1168 PERL_UNUSED_VAR(items);
861d5cbe 1169 thread = S_SV_to_ithread(aTHX_ ST(0));
f4cc38af
JH
1170 XST_mUV(0, thread->tid);
1171 /* XSRETURN(1); - implied */
1172
e1c44605 1173
f9dff5f5 1174void
f4cc38af
JH
1175ithread_join(...)
1176 PREINIT:
fcea4b7c 1177 ithread *thread;
8718f9a1 1178 ithread *current_thread;
fcea4b7c 1179 int join_err;
6ebc233e 1180 AV *params = NULL;
f4cc38af
JH
1181 int len;
1182 int ii;
12701bb8 1183#ifndef WIN32
8718f9a1 1184 int rc_join;
fcea4b7c
JH
1185 void *retval;
1186#endif
5c6ff896 1187 dMY_POOL;
f4cc38af
JH
1188 PPCODE:
1189 /* Object method only */
11db694d 1190 if ((items != 1) || ! sv_isobject(ST(0))) {
f4cc38af 1191 Perl_croak(aTHX_ "Usage: $thr->join()");
fea7688c 1192 }
f4cc38af 1193
8718f9a1 1194 /* Check if the thread is joinable and not ourselves */
861d5cbe 1195 thread = S_SV_to_ithread(aTHX_ ST(0));
8718f9a1
JH
1196 current_thread = S_ithread_get(aTHX);
1197
1198 MUTEX_LOCK(&thread->mutex);
1199 if ((join_err = (thread->state & PERL_ITHR_UNCALLABLE))) {
1200 MUTEX_UNLOCK(&thread->mutex);
1201 Perl_croak(aTHX_ (join_err & PERL_ITHR_DETACHED)
1202 ? "Cannot join a detached thread"
1203 : "Thread already joined");
1204 } else if (thread->tid == current_thread->tid) {
1205 MUTEX_UNLOCK(&thread->mutex);
1206 Perl_croak(aTHX_ "Cannot join self");
fcea4b7c
JH
1207 }
1208
8718f9a1
JH
1209 /* Mark as joined */
1210 thread->state |= PERL_ITHR_JOINED;
1211 MUTEX_UNLOCK(&thread->mutex);
1212
1213 MUTEX_LOCK(&MY_POOL.create_destruct_mutex);
1214 MY_POOL.joinable_threads--;
1215 MUTEX_UNLOCK(&MY_POOL.create_destruct_mutex);
1216
fcea4b7c
JH
1217 /* Join the thread */
1218#ifdef WIN32
8718f9a1
JH
1219 if (WaitForSingleObject(thread->handle, INFINITE) != WAIT_OBJECT_0) {
1220 /* Timeout/abandonment unexpected here; check $^E */
1221 Perl_croak(aTHX_ "PANIC: underlying join failed");
1222 };
fcea4b7c 1223#else
8718f9a1
JH
1224 if ((rc_join = pthread_join(thread->thr, &retval)) != 0) {
1225 /* In progress/deadlock/unknown unexpected here; check $! */
1226 errno = rc_join;
1227 Perl_croak(aTHX_ "PANIC: underlying join failed");
1228 };
fcea4b7c
JH
1229#endif
1230
1231 MUTEX_LOCK(&thread->mutex);
fcea4b7c 1232 /* Get the return value from the call_sv */
955c272e 1233 /* Objects do not survive this process - FIXME */
7df0357e 1234 if ((thread->gimme & G_WANT) != G_VOID) {
fcea4b7c
JH
1235 AV *params_copy;
1236 PerlInterpreter *other_perl;
1237 CLONE_PARAMS clone_params;
fcea4b7c
JH
1238
1239 params_copy = (AV *)SvRV(thread->params);
1240 other_perl = thread->interp;
1241 clone_params.stashes = newAV();
1242 clone_params.flags = CLONEf_JOIN_IN;
1243 PL_ptr_table = ptr_table_new();
fcea4b7c
JH
1244 S_ithread_set(aTHX_ thread);
1245 /* Ensure 'meaningful' addresses retain their meaning */
1246 ptr_table_store(PL_ptr_table, &other_perl->Isv_undef, &PL_sv_undef);
1247 ptr_table_store(PL_ptr_table, &other_perl->Isv_no, &PL_sv_no);
1248 ptr_table_store(PL_ptr_table, &other_perl->Isv_yes, &PL_sv_yes);
1249 params = (AV *)sv_dup((SV*)params_copy, &clone_params);
1250 S_ithread_set(aTHX_ current_thread);
1251 SvREFCNT_dec(clone_params.stashes);
d4315dd6 1252 SvREFCNT_inc_void(params);
fcea4b7c
JH
1253 ptr_table_free(PL_ptr_table);
1254 PL_ptr_table = NULL;
1255 }
1256
955c272e
JH
1257 /* If thread didn't die, then we can free its interpreter */
1258 if (! (thread->state & PERL_ITHR_DIED)) {
1259 S_ithread_clear(aTHX_ thread);
1260 }
6ebc233e 1261 S_ithread_free(aTHX_ thread); /* Releases MUTEX */
955c272e 1262
fcea4b7c 1263 /* If no return values, then just return */
f4cc38af
JH
1264 if (! params) {
1265 XSRETURN_UNDEF;
1266 }
1267
1268 /* Put return values on stack */
1269 len = (int)AvFILL(params);
1270 for (ii=0; ii <= len; ii++) {
1271 SV* param = av_shift(params);
1272 XPUSHs(sv_2mortal(param));
1273 }
1274
1275 /* Free return value array */
1276 SvREFCNT_dec(params);
1277
1278
1279void
1280ithread_yield(...)
1281 CODE:
11db694d 1282 PERL_UNUSED_VAR(items);
f4cc38af
JH
1283 YIELD;
1284
1285
1286void
1287ithread_detach(...)
1288 PREINIT:
1289 ithread *thread;
fcea4b7c 1290 int detach_err;
5c6ff896 1291 dMY_POOL;
f4cc38af 1292 CODE:
11db694d
JH
1293 PERL_UNUSED_VAR(items);
1294
fcea4b7c 1295 /* Detach the thread */
8718f9a1 1296 thread = S_SV_to_ithread(aTHX_ ST(0));
5c6ff896 1297 MUTEX_LOCK(&MY_POOL.create_destruct_mutex);
9ca4d7fd 1298 MUTEX_LOCK(&thread->mutex);
8718f9a1
JH
1299 if (! (detach_err = (thread->state & PERL_ITHR_UNCALLABLE))) {
1300 /* Thread is detachable */
1301 thread->state |= PERL_ITHR_DETACHED;
fcea4b7c 1302#ifdef WIN32
8718f9a1 1303 /* Windows has no 'detach thread' function */
fcea4b7c 1304#else
8718f9a1 1305 PERL_THREAD_DETACH(thread->thr);
fcea4b7c 1306#endif
8718f9a1
JH
1307 if (thread->state & PERL_ITHR_FINISHED) {
1308 MY_POOL.joinable_threads--;
1309 } else {
1310 MY_POOL.running_threads--;
1311 MY_POOL.detached_threads++;
1312 }
4dcb9e53 1313 }
adc09a0e 1314 MUTEX_UNLOCK(&thread->mutex);
5c6ff896 1315 MUTEX_UNLOCK(&MY_POOL.create_destruct_mutex);
4dcb9e53 1316
8718f9a1
JH
1317 if (detach_err) {
1318 Perl_croak(aTHX_ (detach_err & PERL_ITHR_DETACHED)
1319 ? "Thread already detached"
1320 : "Cannot detach a joined thread");
1321 }
1322
955c272e
JH
1323 /* If thread is finished and didn't die,
1324 * then we can free its interpreter */
1325 MUTEX_LOCK(&thread->mutex);
1326 if ((thread->state & PERL_ITHR_FINISHED) &&
1327 ! (thread->state & PERL_ITHR_DIED))
1328 {
1329 S_ithread_clear(aTHX_ thread);
1330 }
6ebc233e 1331 S_ithread_free(aTHX_ thread); /* Releases MUTEX */
f4cc38af 1332
47ba8780
AB
1333
1334void
c0003851
JH
1335ithread_kill(...)
1336 PREINIT:
1337 ithread *thread;
1338 char *sig_name;
1339 IV signal;
1340 CODE:
1341 /* Must have safe signals */
fea7688c 1342 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG) {
4dcb9e53 1343 Perl_croak(aTHX_ "Cannot signal threads without safe signals");
fea7688c 1344 }
c0003851
JH
1345
1346 /* Object method only */
11db694d 1347 if ((items != 2) || ! sv_isobject(ST(0))) {
c0003851 1348 Perl_croak(aTHX_ "Usage: $thr->kill('SIG...')");
fea7688c 1349 }
c0003851 1350
c0003851
JH
1351 /* Get signal */
1352 sig_name = SvPV_nolen(ST(1));
1353 if (isALPHA(*sig_name)) {
fea7688c 1354 if (*sig_name == 'S' && sig_name[1] == 'I' && sig_name[2] == 'G') {
c0003851 1355 sig_name += 3;
fea7688c
JH
1356 }
1357 if ((signal = whichsig(sig_name)) < 0) {
c0003851 1358 Perl_croak(aTHX_ "Unrecognized signal name: %s", sig_name);
fea7688c
JH
1359 }
1360 } else {
c0003851 1361 signal = SvIV(ST(1));
fea7688c 1362 }
c0003851
JH
1363
1364 /* Set the signal for the thread */
861d5cbe 1365 thread = S_SV_to_ithread(aTHX_ ST(0));
4dcb9e53 1366 MUTEX_LOCK(&thread->mutex);
3ceb02cd 1367 if (thread->interp) {
c0003851
JH
1368 dTHXa(thread->interp);
1369 PL_psig_pend[signal]++;
1370 PL_sig_pending = 1;
1371 }
4dcb9e53 1372 MUTEX_UNLOCK(&thread->mutex);
c0003851
JH
1373
1374 /* Return the thread to allow for method chaining */
1375 ST(0) = ST(0);
1376 /* XSRETURN(1); - implied */
1377
1378
1379void
f4cc38af
JH
1380ithread_DESTROY(...)
1381 CODE:
11db694d 1382 PERL_UNUSED_VAR(items);
fcea4b7c 1383 sv_unmagic(SvRV(ST(0)), PERL_MAGIC_shared_scalar);
f4cc38af
JH
1384
1385
1386void
1387ithread_equal(...)
fc04eb16
JH
1388 PREINIT:
1389 int are_equal = 0;
f4cc38af 1390 CODE:
11db694d
JH
1391 PERL_UNUSED_VAR(items);
1392
fc04eb16 1393 /* Compares TIDs to determine thread equality */
f4cc38af
JH
1394 if (sv_isobject(ST(0)) && sv_isobject(ST(1))) {
1395 ithread *thr1 = INT2PTR(ithread *, SvIV(SvRV(ST(0))));
1396 ithread *thr2 = INT2PTR(ithread *, SvIV(SvRV(ST(1))));
fc04eb16
JH
1397 are_equal = (thr1->tid == thr2->tid);
1398 }
1399 if (are_equal) {
1400 XST_mYES(0);
f4cc38af 1401 } else {
fc04eb16 1402 /* Return 0 on false for backward compatibility */
f4cc38af
JH
1403 XST_mIV(0, 0);
1404 }
1405 /* XSRETURN(1); - implied */
1406
47ba8780 1407
47ba8780 1408void
f4cc38af
JH
1409ithread_object(...)
1410 PREINIT:
1411 char *classname;
1412 UV tid;
fc04eb16 1413 ithread *thread;
8718f9a1 1414 int state;
9ca4d7fd 1415 int have_obj = 0;
5c6ff896 1416 dMY_POOL;
f4cc38af
JH
1417 CODE:
1418 /* Class method only */
fea7688c 1419 if (SvROK(ST(0))) {
f4cc38af 1420 Perl_croak(aTHX_ "Usage: threads->object($tid)");
fea7688c 1421 }
f4cc38af
JH
1422 classname = (char *)SvPV_nolen(ST(0));
1423
1424 if ((items < 2) || ! SvOK(ST(1))) {
1425 XSRETURN_UNDEF;
1426 }
1427
fc04eb16 1428 /* threads->object($tid) */
f4cc38af
JH
1429 tid = SvUV(ST(1));
1430
1431 /* Walk through threads list */
5c6ff896
JH
1432 MUTEX_LOCK(&MY_POOL.create_destruct_mutex);
1433 for (thread = MY_POOL.main_thread.next;
1434 thread != &MY_POOL.main_thread;
fc04eb16 1435 thread = thread->next)
f4cc38af 1436 {
9ca4d7fd
JH
1437 /* Look for TID */
1438 if (thread->tid == tid) {
1439 /* Ignore if detached or joined */
8718f9a1
JH
1440 MUTEX_LOCK(&thread->mutex);
1441 state = thread->state;
1442 MUTEX_UNLOCK(&thread->mutex);
1443 if (! (state & PERL_ITHR_UNCALLABLE)) {
9ca4d7fd 1444 /* Put object on stack */
861d5cbe 1445 ST(0) = sv_2mortal(S_ithread_to_SV(aTHX_ Nullsv, thread, classname, TRUE));
9ca4d7fd
JH
1446 have_obj = 1;
1447 }
1448 break;
f4cc38af 1449 }
f4cc38af 1450 }
5c6ff896 1451 MUTEX_UNLOCK(&MY_POOL.create_destruct_mutex);
9ca4d7fd
JH
1452
1453 if (! have_obj) {
f4cc38af
JH
1454 XSRETURN_UNDEF;
1455 }
1456 /* XSRETURN(1); - implied */
1457
1458
1459void
1460ithread__handle(...);
1461 PREINIT:
1462 ithread *thread;
1463 CODE:
11db694d 1464 PERL_UNUSED_VAR(items);
861d5cbe 1465 thread = S_SV_to_ithread(aTHX_ ST(0));
f4cc38af 1466#ifdef WIN32
fcea4b7c 1467 XST_mUV(0, PTR2UV(&thread->handle));
f4cc38af 1468#else
75ba4ae2 1469 XST_mUV(0, PTR2UV(&thread->thr));
f4cc38af
JH
1470#endif
1471 /* XSRETURN(1); - implied */
68795e93 1472
514612b7
JH
1473
1474void
1475ithread_get_stack_size(...)
1476 PREINIT:
1477 IV stack_size;
5c6ff896 1478 dMY_POOL;
514612b7 1479 CODE:
11db694d 1480 PERL_UNUSED_VAR(items);
514612b7
JH
1481 if (sv_isobject(ST(0))) {
1482 /* $thr->get_stack_size() */
1483 ithread *thread = INT2PTR(ithread *, SvIV(SvRV(ST(0))));
1484 stack_size = thread->stack_size;
1485 } else {
1486 /* threads->get_stack_size() */
5c6ff896 1487 stack_size = MY_POOL.default_stack_size;
514612b7
JH
1488 }
1489 XST_mIV(0, stack_size);
1490 /* XSRETURN(1); - implied */
1491
1492
1493void
1494ithread_set_stack_size(...)
1495 PREINIT:
1496 IV old_size;
5c6ff896 1497 dMY_POOL;
514612b7 1498 CODE:
fea7688c 1499 if (items != 2) {
514612b7 1500 Perl_croak(aTHX_ "Usage: threads->set_stack_size($size)");
fea7688c
JH
1501 }
1502 if (sv_isobject(ST(0))) {
514612b7 1503 Perl_croak(aTHX_ "Cannot change stack size of an existing thread");
fea7688c 1504 }
6ebc233e
RGS
1505 if (! looks_like_number(ST(1))) {
1506 Perl_croak(aTHX_ "Stack size must be numeric");
1507 }
514612b7 1508
5c6ff896
JH
1509 old_size = MY_POOL.default_stack_size;
1510 MY_POOL.default_stack_size = S_good_stack_size(aTHX_ SvIV(ST(1)));
514612b7
JH
1511 XST_mIV(0, old_size);
1512 /* XSRETURN(1); - implied */
1513
ead32952
JH
1514
1515void
1516ithread_is_running(...)
1517 PREINIT:
1518 ithread *thread;
1519 CODE:
1520 /* Object method only */
11db694d 1521 if ((items != 1) || ! sv_isobject(ST(0))) {
ead32952 1522 Perl_croak(aTHX_ "Usage: $thr->is_running()");
fea7688c 1523 }
ead32952
JH
1524
1525 thread = INT2PTR(ithread *, SvIV(SvRV(ST(0))));
8718f9a1 1526 MUTEX_LOCK(&thread->mutex);
ead32952 1527 ST(0) = (thread->state & PERL_ITHR_FINISHED) ? &PL_sv_no : &PL_sv_yes;
8718f9a1 1528 MUTEX_UNLOCK(&thread->mutex);
ead32952
JH
1529 /* XSRETURN(1); - implied */
1530
1531
1532void
1533ithread_is_detached(...)
1534 PREINIT:
1535 ithread *thread;
1536 CODE:
11db694d 1537 PERL_UNUSED_VAR(items);
861d5cbe 1538 thread = S_SV_to_ithread(aTHX_ ST(0));
8718f9a1 1539 MUTEX_LOCK(&thread->mutex);
ead32952 1540 ST(0) = (thread->state & PERL_ITHR_DETACHED) ? &PL_sv_yes : &PL_sv_no;
8718f9a1 1541 MUTEX_UNLOCK(&thread->mutex);
ead32952
JH
1542 /* XSRETURN(1); - implied */
1543
1544
1545void
1546ithread_is_joinable(...)
1547 PREINIT:
1548 ithread *thread;
1549 CODE:
1550 /* Object method only */
11db694d 1551 if ((items != 1) || ! sv_isobject(ST(0))) {
ead32952 1552 Perl_croak(aTHX_ "Usage: $thr->is_joinable()");
fea7688c 1553 }
ead32952
JH
1554
1555 thread = INT2PTR(ithread *, SvIV(SvRV(ST(0))));
1556 MUTEX_LOCK(&thread->mutex);
1557 ST(0) = ((thread->state & PERL_ITHR_FINISHED) &&
8718f9a1 1558 ! (thread->state & PERL_ITHR_UNCALLABLE))
ead32952
JH
1559 ? &PL_sv_yes : &PL_sv_no;
1560 MUTEX_UNLOCK(&thread->mutex);
1561 /* XSRETURN(1); - implied */
1562
1563
1564void
1565ithread_wantarray(...)
1566 PREINIT:
1567 ithread *thread;
1568 CODE:
11db694d 1569 PERL_UNUSED_VAR(items);
861d5cbe 1570 thread = S_SV_to_ithread(aTHX_ ST(0));
7df0357e
NC
1571 ST(0) = ((thread->gimme & G_WANT) == G_ARRAY) ? &PL_sv_yes :
1572 ((thread->gimme & G_WANT) == G_VOID) ? &PL_sv_undef
7ef93cb2 1573 /* G_SCALAR */ : &PL_sv_no;
ead32952
JH
1574 /* XSRETURN(1); - implied */
1575
69a9b4b8
RGS
1576
1577void
1578ithread_set_thread_exit_only(...)
1579 PREINIT:
1580 ithread *thread;
1581 CODE:
fea7688c 1582 if (items != 2) {
69a9b4b8 1583 Perl_croak(aTHX_ "Usage: ->set_thread_exit_only(boolean)");
fea7688c 1584 }
861d5cbe 1585 thread = S_SV_to_ithread(aTHX_ ST(0));
69a9b4b8
RGS
1586 MUTEX_LOCK(&thread->mutex);
1587 if (SvTRUE(ST(1))) {
1588 thread->state |= PERL_ITHR_THREAD_EXIT_ONLY;
1589 } else {
1590 thread->state &= ~PERL_ITHR_THREAD_EXIT_ONLY;
1591 }
1592 MUTEX_UNLOCK(&thread->mutex);
1593
955c272e
JH
1594
1595void
1596ithread_error(...)
1597 PREINIT:
1598 ithread *thread;
1599 SV *err = NULL;
1600 CODE:
1601 /* Object method only */
1602 if ((items != 1) || ! sv_isobject(ST(0))) {
1603 Perl_croak(aTHX_ "Usage: $thr->err()");
1604 }
1605
1606 thread = INT2PTR(ithread *, SvIV(SvRV(ST(0))));
1607 MUTEX_LOCK(&thread->mutex);
1608
1609 /* If thread died, then clone the error into the calling thread */
1610 if (thread->state & PERL_ITHR_DIED) {
1611 PerlInterpreter *other_perl;
1612 CLONE_PARAMS clone_params;
1613 ithread *current_thread;
1614
1615 other_perl = thread->interp;
1616 clone_params.stashes = newAV();
1617 clone_params.flags = CLONEf_JOIN_IN;
1618 PL_ptr_table = ptr_table_new();
1619 current_thread = S_ithread_get(aTHX);
1620 S_ithread_set(aTHX_ thread);
1621 /* Ensure 'meaningful' addresses retain their meaning */
1622 ptr_table_store(PL_ptr_table, &other_perl->Isv_undef, &PL_sv_undef);
1623 ptr_table_store(PL_ptr_table, &other_perl->Isv_no, &PL_sv_no);
1624 ptr_table_store(PL_ptr_table, &other_perl->Isv_yes, &PL_sv_yes);
1625 err = sv_dup(thread->err, &clone_params);
1626 S_ithread_set(aTHX_ current_thread);
1627 SvREFCNT_dec(clone_params.stashes);
1628 SvREFCNT_inc_void(err);
1629 /* If error was an object, bless it into the correct class */
1630 if (thread->err_class) {
1631 sv_bless(err, gv_stashpv(thread->err_class, 1));
1632 }
1633 ptr_table_free(PL_ptr_table);
1634 PL_ptr_table = NULL;
1635 }
1636
1637 MUTEX_UNLOCK(&thread->mutex);
1638
1639 if (! err) {
1640 XSRETURN_UNDEF;
1641 }
1642
1643 ST(0) = sv_2mortal(err);
1644 /* XSRETURN(1); - implied */
1645
1646
73e09c8f
JH
1647#endif /* USE_ITHREADS */
1648
fc04eb16 1649
68795e93
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1650BOOT:
1651{
73e09c8f 1652#ifdef USE_ITHREADS
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1653 SV *my_pool_sv = *hv_fetch(PL_modglobal, MY_POOL_KEY,
1654 sizeof(MY_POOL_KEY)-1, TRUE);
1655 my_pool_t *my_poolp = (my_pool_t*)SvPVX(newSV(sizeof(my_pool_t)-1));
1656
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1657 MY_CXT_INIT;
1658
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1659 Zero(my_poolp, 1, my_pool_t);
1660 sv_setuv(my_pool_sv, PTR2UV(my_poolp));
1661
fc04eb16 1662 PL_perl_destruct_level = 2;
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1663 MUTEX_INIT(&MY_POOL.create_destruct_mutex);
1664 MUTEX_LOCK(&MY_POOL.create_destruct_mutex);
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1665
1666 PL_threadhook = &Perl_ithread_hook;
1667
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1668 MY_POOL.tid_counter = 1;
1669# ifdef THREAD_CREATE_NEEDS_STACK
1670 MY_POOL.default_stack_size = THREAD_CREATE_NEEDS_STACK;
1671# endif
1672
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1673 /* The 'main' thread is thread 0.
1674 * It is detached (unjoinable) and immortal.
1675 */
fc04eb16 1676
5c6ff896 1677 MUTEX_INIT(&MY_POOL.main_thread.mutex);
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1678
1679 /* Head of the threads list */
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1680 MY_POOL.main_thread.next = &MY_POOL.main_thread;
1681 MY_POOL.main_thread.prev = &MY_POOL.main_thread;
fc04eb16 1682
5c6ff896 1683 MY_POOL.main_thread.count = 1; /* Immortal */
fc04eb16 1684
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1685 MY_POOL.main_thread.interp = aTHX;
1686 MY_POOL.main_thread.state = PERL_ITHR_DETACHED; /* Detached */
1687 MY_POOL.main_thread.stack_size = MY_POOL.default_stack_size;
fc04eb16 1688# ifdef WIN32
5c6ff896 1689 MY_POOL.main_thread.thr = GetCurrentThreadId();
fc04eb16 1690# else
5c6ff896 1691 MY_POOL.main_thread.thr = pthread_self();
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1692# endif
1693
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1694 S_ithread_set(aTHX_ &MY_POOL.main_thread);
1695 MUTEX_UNLOCK(&MY_POOL.create_destruct_mutex);
73e09c8f 1696#endif /* USE_ITHREADS */
68795e93 1697}