Commit | Line | Data |
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68795e93 NIS |
1 | #define PERL_NO_GET_CONTEXT |
2 | #include "EXTERN.h" | |
3 | #include "perl.h" | |
4 | #include "XSUB.h" | |
4dcb9e53 JH |
5 | /* Workaround for XSUB.h bug under WIN32 */ |
6 | #ifdef WIN32 | |
7 | # undef setjmp | |
c608f8c0 JH |
8 | # if !defined(__BORLANDC__) |
9 | # define setjmp(x) _setjmp(x) | |
10 | # endif | |
4dcb9e53 | 11 | #endif |
0f1612a7 | 12 | #ifdef HAS_PPPORT_H |
404aaa48 | 13 | # define NEED_PL_signals |
0f1612a7 JH |
14 | # define NEED_newRV_noinc |
15 | # define NEED_sv_2pv_nolen | |
16 | # include "ppport.h" | |
17 | # include "threads.h" | |
18 | #endif | |
68795e93 | 19 | |
73e09c8f JH |
20 | #ifdef USE_ITHREADS |
21 | ||
68795e93 | 22 | #ifdef WIN32 |
fc04eb16 | 23 | # include <windows.h> |
514612b7 JH |
24 | /* Supposed to be in Winbase.h */ |
25 | # ifndef STACK_SIZE_PARAM_IS_A_RESERVATION | |
26 | # define STACK_SIZE_PARAM_IS_A_RESERVATION 0x00010000 | |
27 | # endif | |
fc04eb16 | 28 | # include <win32thread.h> |
68795e93 | 29 | #else |
fc04eb16 | 30 | # ifdef OS2 |
5c728af0 | 31 | typedef perl_os_thread pthread_t; |
fc04eb16 JH |
32 | # else |
33 | # include <pthread.h> | |
34 | # endif | |
35 | # include <thread.h> | |
36 | # define PERL_THREAD_SETSPECIFIC(k,v) pthread_setspecific(k,v) | |
37 | # ifdef OLD_PTHREADS_API | |
38 | # define PERL_THREAD_DETACH(t) pthread_detach(&(t)) | |
39 | # else | |
40 | # define PERL_THREAD_DETACH(t) pthread_detach((t)) | |
41 | # endif | |
467f3f08 | 42 | #endif |
d305c2c9 JH |
43 | #if !defined(HAS_GETPAGESIZE) && defined(I_SYS_PARAM) |
44 | # include <sys/param.h> | |
45 | #endif | |
68795e93 | 46 | |
62375a60 | 47 | /* Values for 'state' member */ |
fc04eb16 JH |
48 | #define PERL_ITHR_JOINABLE 0 |
49 | #define PERL_ITHR_DETACHED 1 | |
50 | #define PERL_ITHR_JOINED 2 | |
51 | #define PERL_ITHR_FINISHED 4 | |
52 | ||
53 | typedef struct _ithread { | |
54 | struct _ithread *next; /* Next thread in the list */ | |
55 | struct _ithread *prev; /* Prev thread in the list */ | |
56 | PerlInterpreter *interp; /* The threads interpreter */ | |
57 | UV tid; /* Threads module's thread id */ | |
58 | perl_mutex mutex; /* Mutex for updating things in this struct */ | |
9feacc09 | 59 | int count; /* How many SVs have a reference to us */ |
fc04eb16 JH |
60 | int state; /* Detached, joined, finished, etc. */ |
61 | int gimme; /* Context of create */ | |
62 | SV *init_function; /* Code to run */ | |
63 | SV *params; /* Args to pass function */ | |
68795e93 | 64 | #ifdef WIN32 |
fc04eb16 JH |
65 | DWORD thr; /* OS's idea if thread id */ |
66 | HANDLE handle; /* OS's waitable handle */ | |
68795e93 | 67 | #else |
fc04eb16 | 68 | pthread_t thr; /* OS's handle for the thread */ |
68795e93 | 69 | #endif |
514612b7 | 70 | IV stack_size; |
68795e93 NIS |
71 | } ithread; |
72 | ||
fc04eb16 JH |
73 | |
74 | /* Used by Perl interpreter for thread context switching */ | |
628ab322 DM |
75 | #define MY_CXT_KEY "threads::_guts" XS_VERSION |
76 | ||
77 | typedef struct { | |
78 | ithread *thread; | |
79 | } my_cxt_t; | |
80 | ||
81 | START_MY_CXT | |
82 | ||
83 | ||
fc04eb16 | 84 | /* Linked list of all threads */ |
f4cc38af | 85 | static ithread *threads; |
68795e93 | 86 | |
fc04eb16 JH |
87 | /* Protects the creation and destruction of threads*/ |
88 | static perl_mutex create_destruct_mutex; | |
68795e93 | 89 | |
f4cc38af | 90 | static UV tid_counter = 0; |
5168baf3 | 91 | static IV joinable_threads = 0; |
4dcb9e53 JH |
92 | static IV running_threads = 0; |
93 | static IV detached_threads = 0; | |
514612b7 JH |
94 | #ifdef THREAD_CREATE_NEEDS_STACK |
95 | static IV default_stack_size = THREAD_CREATE_NEEDS_STACK; | |
96 | #else | |
97 | static IV default_stack_size = 0; | |
98 | #endif | |
99 | static IV page_size = 0; | |
c05ae023 AB |
100 | |
101 | ||
fc04eb16 | 102 | /* Used by Perl interpreter for thread context switching */ |
f4cc38af | 103 | static void |
fc04eb16 | 104 | S_ithread_set(pTHX_ ithread *thread) |
c05ae023 | 105 | { |
628ab322 DM |
106 | dMY_CXT; |
107 | MY_CXT.thread = thread; | |
c05ae023 AB |
108 | } |
109 | ||
fc04eb16 JH |
110 | static ithread * |
111 | S_ithread_get(pTHX) | |
112 | { | |
628ab322 | 113 | dMY_CXT; |
fc04eb16 | 114 | return (MY_CXT.thread); |
c05ae023 AB |
115 | } |
116 | ||
117 | ||
fc04eb16 JH |
118 | /* Free any data (such as the Perl interpreter) attached to an ithread |
119 | * structure. This is a bit like undef on SVs, where the SV isn't freed, | |
120 | * but the PVX is. Must be called with thread->mutex already held. | |
2e676467 | 121 | */ |
2e676467 | 122 | static void |
fc04eb16 | 123 | S_ithread_clear(pTHX_ ithread *thread) |
2e676467 DM |
124 | { |
125 | PerlInterpreter *interp; | |
fc04eb16 | 126 | |
ead32952 JH |
127 | assert((thread->state & PERL_ITHR_FINISHED) && |
128 | (thread->state & (PERL_ITHR_DETACHED|PERL_ITHR_JOINED))); | |
2e676467 DM |
129 | |
130 | interp = thread->interp; | |
131 | if (interp) { | |
fc04eb16 JH |
132 | dTHXa(interp); |
133 | ||
134 | PERL_SET_CONTEXT(interp); | |
135 | S_ithread_set(aTHX_ thread); | |
f2cba68d | 136 | |
fc04eb16 JH |
137 | SvREFCNT_dec(thread->params); |
138 | thread->params = Nullsv; | |
2e676467 | 139 | |
fc04eb16 JH |
140 | perl_destruct(interp); |
141 | thread->interp = NULL; | |
2e676467 DM |
142 | } |
143 | if (interp) | |
fc04eb16 JH |
144 | perl_free(interp); |
145 | ||
2e676467 DM |
146 | PERL_SET_CONTEXT(aTHX); |
147 | } | |
148 | ||
68795e93 | 149 | |
fc04eb16 | 150 | /* Free an ithread structure and any attached data if its count == 0 */ |
bcd9ca9b | 151 | static void |
fc04eb16 | 152 | S_ithread_destruct(pTHX_ ithread *thread) |
68795e93 | 153 | { |
385d56e4 | 154 | #ifdef WIN32 |
fc04eb16 | 155 | HANDLE handle; |
385d56e4 JH |
156 | #endif |
157 | ||
fc04eb16 | 158 | MUTEX_LOCK(&thread->mutex); |
bcd9ca9b | 159 | |
fc04eb16 JH |
160 | /* Thread is still in use */ |
161 | if (thread->count != 0) { | |
162 | MUTEX_UNLOCK(&thread->mutex); | |
163 | return; | |
164 | } | |
9feacc09 | 165 | |
fc04eb16 JH |
166 | /* Main thread (0) is immortal and should never get here */ |
167 | assert(thread->tid != 0); | |
168 | ||
169 | /* Remove from circular list of threads */ | |
4dcb9e53 | 170 | MUTEX_LOCK(&create_destruct_mutex); |
fc04eb16 JH |
171 | thread->next->prev = thread->prev; |
172 | thread->prev->next = thread->next; | |
173 | thread->next = NULL; | |
174 | thread->prev = NULL; | |
175 | MUTEX_UNLOCK(&create_destruct_mutex); | |
c2f2a82b | 176 | |
fc04eb16 JH |
177 | /* Thread is now disowned */ |
178 | S_ithread_clear(aTHX_ thread); | |
385d56e4 JH |
179 | |
180 | #ifdef WIN32 | |
fc04eb16 JH |
181 | handle = thread->handle; |
182 | thread->handle = NULL; | |
385d56e4 | 183 | #endif |
fc04eb16 JH |
184 | MUTEX_UNLOCK(&thread->mutex); |
185 | MUTEX_DESTROY(&thread->mutex); | |
385d56e4 | 186 | |
c7667023 | 187 | #ifdef WIN32 |
fc04eb16 JH |
188 | if (handle) |
189 | CloseHandle(handle); | |
c7667023 | 190 | #endif |
385d56e4 | 191 | |
fc04eb16 JH |
192 | /* Call PerlMemShared_free() in the context of the "first" interpreter |
193 | * per http://www.nntp.perl.org/group/perl.perl5.porters/110772 | |
194 | */ | |
195 | aTHX = PL_curinterp; | |
196 | PerlMemShared_free(thread); | |
68795e93 NIS |
197 | } |
198 | ||
fc04eb16 JH |
199 | |
200 | /* Called on exit */ | |
62375a60 NIS |
201 | int |
202 | Perl_ithread_hook(pTHX) | |
203 | { | |
204 | int veto_cleanup = 0; | |
205 | MUTEX_LOCK(&create_destruct_mutex); | |
4dcb9e53 JH |
206 | if ((aTHX == PL_curinterp) && |
207 | (running_threads || joinable_threads)) | |
208 | { | |
fc04eb16 | 209 | if (ckWARN_d(WARN_THREADS)) { |
4dcb9e53 JH |
210 | Perl_warn(aTHX_ "Perl exited with active threads:\n\t%" |
211 | IVdf " running and unjoined\n\t%" | |
212 | IVdf " finished and unjoined\n\t%" | |
213 | IVdf " running and detached\n", | |
214 | running_threads, | |
215 | joinable_threads, | |
216 | detached_threads); | |
fc04eb16 JH |
217 | } |
218 | veto_cleanup = 1; | |
62375a60 NIS |
219 | } |
220 | MUTEX_UNLOCK(&create_destruct_mutex); | |
fc04eb16 | 221 | return (veto_cleanup); |
62375a60 NIS |
222 | } |
223 | ||
68795e93 NIS |
224 | |
225 | /* MAGIC (in mg.h sense) hooks */ | |
226 | ||
227 | int | |
228 | ithread_mg_get(pTHX_ SV *sv, MAGIC *mg) | |
229 | { | |
fc04eb16 | 230 | ithread *thread = (ithread *)mg->mg_ptr; |
45977657 | 231 | SvIV_set(sv, PTR2IV(thread)); |
68795e93 | 232 | SvIOK_on(sv); |
fc04eb16 | 233 | return (0); |
68795e93 NIS |
234 | } |
235 | ||
236 | int | |
237 | ithread_mg_free(pTHX_ SV *sv, MAGIC *mg) | |
238 | { | |
f2cba68d JH |
239 | ithread *thread = (ithread *)mg->mg_ptr; |
240 | int cleanup; | |
241 | ||
68795e93 | 242 | MUTEX_LOCK(&thread->mutex); |
f2cba68d JH |
243 | cleanup = ((--thread->count == 0) && |
244 | (thread->state & PERL_ITHR_FINISHED) && | |
245 | (thread->state & (PERL_ITHR_DETACHED|PERL_ITHR_JOINED))); | |
246 | MUTEX_UNLOCK(&thread->mutex); | |
247 | ||
248 | if (cleanup) | |
249 | S_ithread_destruct(aTHX_ thread); | |
fc04eb16 | 250 | return (0); |
68795e93 NIS |
251 | } |
252 | ||
253 | int | |
254 | ithread_mg_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *param) | |
255 | { | |
fc04eb16 | 256 | ithread *thread = (ithread *)mg->mg_ptr; |
68795e93 | 257 | MUTEX_LOCK(&thread->mutex); |
68795e93 NIS |
258 | thread->count++; |
259 | MUTEX_UNLOCK(&thread->mutex); | |
fc04eb16 | 260 | return (0); |
68795e93 NIS |
261 | } |
262 | ||
263 | MGVTBL ithread_vtbl = { | |
fc04eb16 JH |
264 | ithread_mg_get, /* get */ |
265 | 0, /* set */ | |
266 | 0, /* len */ | |
267 | 0, /* clear */ | |
268 | ithread_mg_free, /* free */ | |
269 | 0, /* copy */ | |
270 | ithread_mg_dup /* dup */ | |
68795e93 NIS |
271 | }; |
272 | ||
47ba8780 | 273 | |
514612b7 JH |
274 | /* Provided default, minimum and rational stack sizes */ |
275 | static IV | |
276 | good_stack_size(pTHX_ IV stack_size) | |
277 | { | |
278 | /* Use default stack size if no stack size specified */ | |
279 | if (! stack_size) | |
280 | return (default_stack_size); | |
281 | ||
282 | #ifdef PTHREAD_STACK_MIN | |
283 | /* Can't use less than minimum */ | |
284 | if (stack_size < PTHREAD_STACK_MIN) { | |
4dcb9e53 | 285 | if (ckWARN(WARN_THREADS)) { |
514612b7 JH |
286 | Perl_warn(aTHX_ "Using minimum thread stack size of %" IVdf, (IV)PTHREAD_STACK_MIN); |
287 | } | |
288 | return (PTHREAD_STACK_MIN); | |
289 | } | |
290 | #endif | |
291 | ||
292 | /* Round up to page size boundary */ | |
293 | if (page_size <= 0) { | |
d305c2c9 | 294 | #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE)) |
514612b7 | 295 | SETERRNO(0, SS_NORMAL); |
d305c2c9 | 296 | # ifdef _SC_PAGESIZE |
514612b7 | 297 | page_size = sysconf(_SC_PAGESIZE); |
d305c2c9 | 298 | # else |
514612b7 | 299 | page_size = sysconf(_SC_MMAP_PAGE_SIZE); |
d305c2c9 | 300 | # endif |
514612b7 JH |
301 | if ((long)page_size < 0) { |
302 | if (errno) { | |
303 | SV * const error = get_sv("@", FALSE); | |
304 | (void)SvUPGRADE(error, SVt_PV); | |
305 | Perl_croak(aTHX_ "PANIC: sysconf: %s", SvPV_nolen(error)); | |
306 | } else { | |
307 | Perl_croak(aTHX_ "PANIC: sysconf: pagesize unknown"); | |
308 | } | |
309 | } | |
d305c2c9 JH |
310 | #else |
311 | # ifdef HAS_GETPAGESIZE | |
514612b7 | 312 | page_size = getpagesize(); |
514612b7 | 313 | # else |
d305c2c9 JH |
314 | # if defined(I_SYS_PARAM) && defined(PAGESIZE) |
315 | page_size = PAGESIZE; | |
316 | # else | |
514612b7 | 317 | page_size = 8192; /* A conservative default */ |
d305c2c9 | 318 | # endif |
514612b7 | 319 | # endif |
d305c2c9 JH |
320 | if (page_size <= 0) |
321 | Perl_croak(aTHX_ "PANIC: bad pagesize %" IVdf, (IV)page_size); | |
514612b7 JH |
322 | #endif |
323 | } | |
324 | stack_size = ((stack_size + (page_size - 1)) / page_size) * page_size; | |
325 | ||
326 | return (stack_size); | |
327 | } | |
328 | ||
329 | ||
fc04eb16 JH |
330 | /* Starts executing the thread. |
331 | * Passed as the C level function to run in the new thread. | |
b1edfb69 | 332 | */ |
47ba8780 | 333 | #ifdef WIN32 |
f4cc38af | 334 | static THREAD_RET_TYPE |
fc04eb16 | 335 | S_ithread_run(LPVOID arg) |
47ba8780 | 336 | #else |
fc04eb16 JH |
337 | static void * |
338 | S_ithread_run(void * arg) | |
47ba8780 | 339 | #endif |
fc04eb16 JH |
340 | { |
341 | ithread *thread = (ithread *)arg; | |
342 | int cleanup; | |
f2cba68d | 343 | |
fc04eb16 JH |
344 | dTHXa(thread->interp); |
345 | PERL_SET_CONTEXT(thread->interp); | |
346 | S_ithread_set(aTHX_ thread); | |
47ba8780 | 347 | |
68795e93 | 348 | #if 0 |
fc04eb16 JH |
349 | /* Far from clear messing with ->thr child-side is a good idea */ |
350 | MUTEX_LOCK(&thread->mutex); | |
47ba8780 | 351 | #ifdef WIN32 |
fc04eb16 | 352 | thread->thr = GetCurrentThreadId(); |
47ba8780 | 353 | #else |
fc04eb16 | 354 | thread->thr = pthread_self(); |
47ba8780 | 355 | #endif |
fc04eb16 | 356 | MUTEX_UNLOCK(&thread->mutex); |
68795e93 | 357 | #endif |
47ba8780 | 358 | |
fc04eb16 | 359 | PL_perl_destruct_level = 2; |
f2cba68d | 360 | |
fc04eb16 JH |
361 | { |
362 | AV *params = (AV *)SvRV(thread->params); | |
363 | int len = (int)av_len(params)+1; | |
364 | int ii; | |
4dcb9e53 JH |
365 | int jmp_rc = 0; |
366 | I32 oldscope; | |
367 | ||
368 | dJMPENV; | |
fc04eb16 JH |
369 | |
370 | dSP; | |
371 | ENTER; | |
372 | SAVETMPS; | |
373 | ||
374 | /* Put args on the stack */ | |
375 | PUSHMARK(SP); | |
376 | for (ii=0; ii < len; ii++) { | |
377 | XPUSHs(av_shift(params)); | |
378 | } | |
379 | PUTBACK; | |
380 | ||
4dcb9e53 JH |
381 | oldscope = PL_scopestack_ix; |
382 | JMPENV_PUSH(jmp_rc); | |
383 | if (jmp_rc == 0) { | |
384 | /* Run the specified function */ | |
385 | len = (int)call_sv(thread->init_function, thread->gimme|G_EVAL); | |
386 | } else if (jmp_rc == 2) { | |
387 | while (PL_scopestack_ix > oldscope) { | |
388 | LEAVE; | |
389 | } | |
390 | } | |
391 | JMPENV_POP; | |
fc04eb16 JH |
392 | |
393 | /* Remove args from stack and put back in params array */ | |
394 | SPAGAIN; | |
395 | for (ii=len-1; ii >= 0; ii--) { | |
396 | SV *sv = POPs; | |
4dcb9e53 JH |
397 | if (jmp_rc == 0) { |
398 | av_store(params, ii, SvREFCNT_inc(sv)); | |
399 | } | |
fc04eb16 JH |
400 | } |
401 | ||
4dcb9e53 JH |
402 | FREETMPS; |
403 | LEAVE; | |
404 | ||
fc04eb16 JH |
405 | /* Check for failure */ |
406 | if (SvTRUE(ERRSV) && ckWARN_d(WARN_THREADS)) { | |
4dcb9e53 JH |
407 | oldscope = PL_scopestack_ix; |
408 | JMPENV_PUSH(jmp_rc); | |
409 | if (jmp_rc == 0) { | |
410 | Perl_warn(aTHX_ "Thread %" UVuf " terminated abnormally: %" SVf, thread->tid, ERRSV); | |
411 | } else if (jmp_rc == 2) { | |
412 | while (PL_scopestack_ix > oldscope) { | |
413 | LEAVE; | |
414 | } | |
415 | } | |
416 | JMPENV_POP; | |
fc04eb16 JH |
417 | } |
418 | ||
fc04eb16 JH |
419 | /* Release function ref */ |
420 | SvREFCNT_dec(thread->init_function); | |
421 | thread->init_function = Nullsv; | |
422 | } | |
62375a60 | 423 | |
fc04eb16 JH |
424 | PerlIO_flush((PerlIO *)NULL); |
425 | ||
426 | MUTEX_LOCK(&thread->mutex); | |
427 | /* Mark as finished */ | |
428 | thread->state |= PERL_ITHR_FINISHED; | |
429 | /* Cleanup if detached */ | |
430 | cleanup = (thread->state & PERL_ITHR_DETACHED); | |
431 | MUTEX_UNLOCK(&thread->mutex); | |
432 | ||
4dcb9e53 JH |
433 | if (cleanup) { |
434 | MUTEX_LOCK(&create_destruct_mutex); | |
435 | detached_threads--; | |
436 | MUTEX_UNLOCK(&create_destruct_mutex); | |
fc04eb16 | 437 | S_ithread_destruct(aTHX_ thread); |
4dcb9e53 JH |
438 | } else { |
439 | MUTEX_LOCK(&create_destruct_mutex); | |
440 | running_threads--; | |
441 | joinable_threads++; | |
442 | MUTEX_UNLOCK(&create_destruct_mutex); | |
5168baf3 | 443 | } |
91604d21 | 444 | |
47ba8780 | 445 | #ifdef WIN32 |
fc04eb16 | 446 | return ((DWORD)0); |
e8f2bb9a | 447 | #else |
fc04eb16 | 448 | return (0); |
47ba8780 | 449 | #endif |
68795e93 NIS |
450 | } |
451 | ||
fc04eb16 JH |
452 | |
453 | /* Type conversion helper functions */ | |
f4cc38af | 454 | static SV * |
68795e93 NIS |
455 | ithread_to_SV(pTHX_ SV *obj, ithread *thread, char *classname, bool inc) |
456 | { | |
457 | SV *sv; | |
458 | MAGIC *mg; | |
fc04eb16 | 459 | |
68795e93 | 460 | if (inc) { |
fc04eb16 JH |
461 | MUTEX_LOCK(&thread->mutex); |
462 | thread->count++; | |
463 | MUTEX_UNLOCK(&thread->mutex); | |
464 | } | |
465 | ||
466 | if (! obj) { | |
467 | obj = newSV(0); | |
68795e93 | 468 | } |
fc04eb16 JH |
469 | |
470 | sv = newSVrv(obj, classname); | |
471 | sv_setiv(sv, PTR2IV(thread)); | |
472 | mg = sv_magicext(sv, Nullsv, PERL_MAGIC_shared_scalar, &ithread_vtbl, (char *)thread, 0); | |
68795e93 NIS |
473 | mg->mg_flags |= MGf_DUP; |
474 | SvREADONLY_on(sv); | |
fc04eb16 JH |
475 | |
476 | return (obj); | |
68795e93 | 477 | } |
47ba8780 | 478 | |
f4cc38af | 479 | static ithread * |
68795e93 NIS |
480 | SV_to_ithread(pTHX_ SV *sv) |
481 | { | |
fc04eb16 JH |
482 | /* Argument is a thread */ |
483 | if (SvROK(sv)) { | |
484 | return (INT2PTR(ithread *, SvIV(SvRV(sv)))); | |
485 | } | |
486 | /* Argument is classname, therefore return current thread */ | |
487 | return (S_ithread_get(aTHX)); | |
47ba8780 AB |
488 | } |
489 | ||
47ba8780 | 490 | |
fc04eb16 JH |
491 | /* threads->create() |
492 | * Called in context of parent thread. | |
493 | */ | |
f4cc38af | 494 | static SV * |
fc04eb16 JH |
495 | S_ithread_create( |
496 | pTHX_ SV *obj, | |
497 | char *classname, | |
498 | SV *init_function, | |
514612b7 | 499 | IV stack_size, |
9d9ff5b1 | 500 | int gimme, |
fc04eb16 | 501 | SV *params) |
68795e93 | 502 | { |
fc04eb16 JH |
503 | ithread *thread; |
504 | CLONE_PARAMS clone_param; | |
505 | ithread *current_thread = S_ithread_get(aTHX); | |
3b1c3273 | 506 | |
fc04eb16 JH |
507 | SV **tmps_tmp = PL_tmps_stack; |
508 | IV tmps_ix = PL_tmps_ix; | |
d94006e8 | 509 | #ifndef WIN32 |
fc04eb16 JH |
510 | int rc_stack_size = 0; |
511 | int rc_thread_create = 0; | |
d94006e8 | 512 | #endif |
3b1c3273 | 513 | |
fc04eb16 JH |
514 | MUTEX_LOCK(&create_destruct_mutex); |
515 | ||
516 | /* Allocate thread structure */ | |
517 | thread = (ithread *)PerlMemShared_malloc(sizeof(ithread)); | |
518 | if (!thread) { | |
519 | MUTEX_UNLOCK(&create_destruct_mutex); | |
520 | PerlLIO_write(PerlIO_fileno(Perl_error_log), PL_no_mem, strlen(PL_no_mem)); | |
521 | my_exit(1); | |
522 | } | |
523 | Zero(thread, 1, ithread); | |
524 | ||
525 | /* Add to threads list */ | |
526 | thread->next = threads; | |
527 | thread->prev = threads->prev; | |
528 | threads->prev = thread; | |
529 | thread->prev->next = thread; | |
c05ae023 | 530 | |
fc04eb16 JH |
531 | /* Set count to 1 immediately in case thread exits before |
532 | * we return to caller! | |
533 | */ | |
534 | thread->count = 1; | |
535 | ||
536 | MUTEX_INIT(&thread->mutex); | |
537 | thread->tid = tid_counter++; | |
514612b7 | 538 | thread->stack_size = good_stack_size(aTHX_ stack_size); |
9d9ff5b1 | 539 | thread->gimme = gimme; |
fc04eb16 JH |
540 | |
541 | /* "Clone" our interpreter into the thread's interpreter. | |
542 | * This gives thread access to "static data" and code. | |
543 | */ | |
544 | PerlIO_flush((PerlIO *)NULL); | |
545 | S_ithread_set(aTHX_ thread); | |
546 | ||
547 | SAVEBOOL(PL_srand_called); /* Save this so it becomes the correct value */ | |
548 | PL_srand_called = FALSE; /* Set it to false so we can detect if it gets | |
549 | set during the clone */ | |
3b1c3273 | 550 | |
47ba8780 | 551 | #ifdef WIN32 |
fc04eb16 | 552 | thread->interp = perl_clone(aTHX, CLONEf_KEEP_PTR_TABLE | CLONEf_CLONE_HOST); |
47ba8780 | 553 | #else |
fc04eb16 | 554 | thread->interp = perl_clone(aTHX, CLONEf_KEEP_PTR_TABLE); |
47ba8780 | 555 | #endif |
47ba8780 | 556 | |
fc04eb16 JH |
557 | /* perl_clone() leaves us in new interpreter's context. As it is tricky |
558 | * to spot an implicit aTHX, create a new scope with aTHX matching the | |
559 | * context for the duration of our work for new interpreter. | |
560 | */ | |
561 | { | |
562 | dTHXa(thread->interp); | |
563 | ||
564 | MY_CXT_CLONE; | |
565 | ||
566 | /* Here we remove END blocks since they should only run in the thread | |
567 | * they are created | |
568 | */ | |
569 | SvREFCNT_dec(PL_endav); | |
570 | PL_endav = newAV(); | |
404aaa48 | 571 | |
f2e0bb91 JH |
572 | if (SvPOK(init_function)) { |
573 | thread->init_function = newSV(0); | |
574 | sv_copypv(thread->init_function, init_function); | |
575 | } else { | |
576 | clone_param.flags = 0; | |
577 | thread->init_function = sv_dup(init_function, &clone_param); | |
578 | if (SvREFCNT(thread->init_function) == 0) { | |
579 | SvREFCNT_inc(thread->init_function); | |
580 | } | |
fc04eb16 JH |
581 | } |
582 | ||
583 | thread->params = sv_dup(params, &clone_param); | |
584 | SvREFCNT_inc(thread->params); | |
585 | ||
586 | /* The code below checks that anything living on the tmps stack and | |
587 | * has been cloned (so it lives in the ptr_table) has a refcount | |
588 | * higher than 0. | |
589 | * | |
590 | * If the refcount is 0 it means that a something on the stack/context | |
591 | * was holding a reference to it and since we init_stacks() in | |
592 | * perl_clone that won't get cleaned and we will get a leaked scalar. | |
593 | * The reason it was cloned was that it lived on the @_ stack. | |
594 | * | |
595 | * Example of this can be found in bugreport 15837 where calls in the | |
596 | * parameter list end up as a temp. | |
597 | * | |
598 | * One could argue that this fix should be in perl_clone. | |
599 | */ | |
600 | while (tmps_ix > 0) { | |
601 | SV* sv = (SV*)ptr_table_fetch(PL_ptr_table, tmps_tmp[tmps_ix]); | |
602 | tmps_ix--; | |
603 | if (sv && SvREFCNT(sv) == 0) { | |
604 | SvREFCNT_inc(sv); | |
605 | SvREFCNT_dec(sv); | |
606 | } | |
607 | } | |
608 | ||
609 | SvTEMP_off(thread->init_function); | |
610 | ptr_table_free(PL_ptr_table); | |
611 | PL_ptr_table = NULL; | |
612 | PL_exit_flags |= PERL_EXIT_DESTRUCT_END; | |
613 | } | |
614 | S_ithread_set(aTHX_ current_thread); | |
615 | PERL_SET_CONTEXT(aTHX); | |
616 | ||
617 | /* Create/start the thread */ | |
47ba8780 | 618 | #ifdef WIN32 |
fc04eb16 | 619 | thread->handle = CreateThread(NULL, |
514612b7 | 620 | (DWORD)thread->stack_size, |
fc04eb16 JH |
621 | S_ithread_run, |
622 | (LPVOID)thread, | |
514612b7 | 623 | STACK_SIZE_PARAM_IS_A_RESERVATION, |
fc04eb16 | 624 | &thread->thr); |
82c40bf6 | 625 | #else |
fc04eb16 JH |
626 | { |
627 | static pthread_attr_t attr; | |
628 | static int attr_inited = 0; | |
629 | static int attr_joinable = PTHREAD_CREATE_JOINABLE; | |
630 | if (! attr_inited) { | |
631 | pthread_attr_init(&attr); | |
632 | attr_inited = 1; | |
633 | } | |
634 | ||
fa26028c | 635 | # ifdef PTHREAD_ATTR_SETDETACHSTATE |
fc04eb16 JH |
636 | /* Threads start out joinable */ |
637 | PTHREAD_ATTR_SETDETACHSTATE(&attr, attr_joinable); | |
fa26028c | 638 | # endif |
fc04eb16 | 639 | |
514612b7 | 640 | # ifdef _POSIX_THREAD_ATTR_STACKSIZE |
fc04eb16 | 641 | /* Set thread's stack size */ |
514612b7 JH |
642 | if (thread->stack_size > 0) { |
643 | rc_stack_size = pthread_attr_setstacksize(&attr, (size_t)thread->stack_size); | |
644 | } | |
3eb37d38 AB |
645 | # endif |
646 | ||
fc04eb16 JH |
647 | /* Create the thread */ |
648 | if (! rc_stack_size) { | |
649 | # ifdef OLD_PTHREADS_API | |
650 | rc_thread_create = pthread_create(&thread->thr, | |
651 | attr, | |
652 | S_ithread_run, | |
653 | (void *)thread); | |
654 | # else | |
655 | # if defined(HAS_PTHREAD_ATTR_SETSCOPE) && defined(PTHREAD_SCOPE_SYSTEM) | |
656 | pthread_attr_setscope(&attr, PTHREAD_SCOPE_SYSTEM); | |
657 | # endif | |
658 | rc_thread_create = pthread_create(&thread->thr, | |
659 | &attr, | |
660 | S_ithread_run, | |
661 | (void *)thread); | |
19a077f6 | 662 | # endif |
fc04eb16 | 663 | } |
514612b7 JH |
664 | |
665 | # ifdef _POSIX_THREAD_ATTR_STACKSIZE | |
666 | /* Try to get thread's actual stack size */ | |
667 | { | |
668 | size_t stacksize; | |
58a3a76c JH |
669 | #ifdef HPUX1020 |
670 | stacksize = pthread_attr_getstacksize(attr); | |
671 | #else | |
672 | if (! pthread_attr_getstacksize(&attr, &stacksize)) | |
673 | #endif | |
674 | if (stacksize > 0) { | |
514612b7 JH |
675 | thread->stack_size = (IV)stacksize; |
676 | } | |
514612b7 JH |
677 | } |
678 | # endif | |
fc04eb16 | 679 | } |
82c40bf6 | 680 | #endif |
bcd9ca9b | 681 | |
fc04eb16 | 682 | /* Check for errors */ |
d94006e8 | 683 | #ifdef WIN32 |
fc04eb16 | 684 | if (thread->handle == NULL) { |
d94006e8 | 685 | #else |
fc04eb16 | 686 | if (rc_stack_size || rc_thread_create) { |
d94006e8 | 687 | #endif |
fc04eb16 JH |
688 | MUTEX_UNLOCK(&create_destruct_mutex); |
689 | sv_2mortal(params); | |
690 | S_ithread_destruct(aTHX_ thread); | |
d94006e8 | 691 | #ifndef WIN32 |
514612b7 JH |
692 | if (ckWARN_d(WARN_THREADS)) { |
693 | if (rc_stack_size) | |
694 | Perl_warn(aTHX_ "Thread creation failed: pthread_attr_setstacksize(%" IVdf ") returned %d", thread->stack_size, rc_stack_size); | |
695 | else | |
696 | Perl_warn(aTHX_ "Thread creation failed: pthread_create returned %d", rc_thread_create); | |
697 | } | |
d94006e8 | 698 | #endif |
fc04eb16 JH |
699 | return (&PL_sv_undef); |
700 | } | |
701 | ||
4dcb9e53 | 702 | running_threads++; |
fc04eb16 JH |
703 | MUTEX_UNLOCK(&create_destruct_mutex); |
704 | ||
705 | sv_2mortal(params); | |
3b1c3273 | 706 | |
fc04eb16 | 707 | return (ithread_to_SV(aTHX_ obj, thread, classname, FALSE)); |
68795e93 | 708 | } |
47ba8780 | 709 | |
73e09c8f | 710 | #endif /* USE_ITHREADS */ |
e1c44605 | 711 | |
fcea4b7c | 712 | |
fc04eb16 | 713 | MODULE = threads PACKAGE = threads PREFIX = ithread_ |
68795e93 | 714 | PROTOTYPES: DISABLE |
8222d950 | 715 | |
73e09c8f JH |
716 | #ifdef USE_ITHREADS |
717 | ||
68795e93 | 718 | void |
f4cc38af JH |
719 | ithread_create(...) |
720 | PREINIT: | |
721 | char *classname; | |
514612b7 | 722 | ithread *thread; |
f4cc38af JH |
723 | SV *function_to_call; |
724 | AV *params; | |
514612b7 JH |
725 | HV *specs; |
726 | IV stack_size; | |
9d9ff5b1 JH |
727 | int context; |
728 | char *str; | |
514612b7 | 729 | int idx; |
f4cc38af JH |
730 | int ii; |
731 | CODE: | |
514612b7 JH |
732 | if ((items >= 2) && SvROK(ST(1)) && SvTYPE(SvRV(ST(1)))==SVt_PVHV) { |
733 | if (--items < 2) | |
734 | Perl_croak(aTHX_ "Usage: threads->create(\\%specs, function, ...)"); | |
735 | specs = (HV*)SvRV(ST(1)); | |
736 | idx = 1; | |
737 | } else { | |
738 | if (items < 2) | |
739 | Perl_croak(aTHX_ "Usage: threads->create(function, ...)"); | |
740 | specs = NULL; | |
741 | idx = 0; | |
742 | } | |
f4cc38af | 743 | |
514612b7 JH |
744 | if (sv_isobject(ST(0))) { |
745 | /* $thr->create() */ | |
746 | classname = HvNAME(SvSTASH(SvRV(ST(0)))); | |
747 | thread = INT2PTR(ithread *, SvIV(SvRV(ST(0)))); | |
748 | stack_size = thread->stack_size; | |
749 | } else { | |
750 | /* threads->create() */ | |
751 | classname = (char *)SvPV_nolen(ST(0)); | |
752 | stack_size = default_stack_size; | |
753 | } | |
754 | ||
755 | function_to_call = ST(idx+1); | |
756 | ||
9d9ff5b1 | 757 | context = -1; |
514612b7 JH |
758 | if (specs) { |
759 | /* stack_size */ | |
760 | if (hv_exists(specs, "stack", 5)) { | |
761 | stack_size = SvIV(*hv_fetch(specs, "stack", 5, 0)); | |
762 | } else if (hv_exists(specs, "stacksize", 9)) { | |
763 | stack_size = SvIV(*hv_fetch(specs, "stacksize", 9, 0)); | |
764 | } else if (hv_exists(specs, "stack_size", 10)) { | |
765 | stack_size = SvIV(*hv_fetch(specs, "stack_size", 10, 0)); | |
766 | } | |
9d9ff5b1 JH |
767 | |
768 | /* context */ | |
769 | if (hv_exists(specs, "context", 7)) { | |
770 | str = (char *)SvPV_nolen(*hv_fetch(specs, "context", 7, 0)); | |
771 | switch (*str) { | |
772 | case 'a': | |
773 | case 'A': | |
774 | context = G_ARRAY; | |
775 | break; | |
776 | case 's': | |
777 | case 'S': | |
778 | context = G_SCALAR; | |
779 | break; | |
780 | case 'v': | |
781 | case 'V': | |
782 | context = G_VOID; | |
783 | break; | |
784 | default: | |
785 | Perl_croak(aTHX_ "Invalid context: %s", str); | |
786 | } | |
787 | } else if (hv_exists(specs, "array", 5)) { | |
788 | if (SvTRUE(*hv_fetch(specs, "array", 5, 0))) { | |
789 | context = G_ARRAY; | |
790 | } | |
791 | } else if (hv_exists(specs, "scalar", 6)) { | |
792 | if (SvTRUE(*hv_fetch(specs, "scalar", 6, 0))) { | |
793 | context = G_SCALAR; | |
794 | } | |
795 | } else if (hv_exists(specs, "void", 4)) { | |
796 | if (SvTRUE(*hv_fetch(specs, "void", 4, 0))) { | |
797 | context = G_VOID; | |
798 | } | |
799 | } | |
800 | } | |
801 | if (context == -1) { | |
802 | context = GIMME_V; /* Implicit context */ | |
803 | } else { | |
804 | context |= (GIMME_V & (~(G_ARRAY|G_SCALAR|G_VOID))); | |
514612b7 | 805 | } |
f4cc38af JH |
806 | |
807 | /* Function args */ | |
808 | params = newAV(); | |
809 | if (items > 2) { | |
514612b7 JH |
810 | for (ii=2; ii < items ; ii++) { |
811 | av_push(params, SvREFCNT_inc(ST(idx+ii))); | |
f4cc38af JH |
812 | } |
813 | } | |
814 | ||
815 | /* Create thread */ | |
bcd9ca9b | 816 | ST(0) = sv_2mortal(S_ithread_create(aTHX_ Nullsv, |
514612b7 JH |
817 | classname, |
818 | function_to_call, | |
819 | stack_size, | |
9d9ff5b1 | 820 | context, |
514612b7 | 821 | newRV_noinc((SV*)params))); |
f4cc38af JH |
822 | /* XSRETURN(1); - implied */ |
823 | ||
8222d950 | 824 | |
68795e93 | 825 | void |
f4cc38af JH |
826 | ithread_list(...) |
827 | PREINIT: | |
828 | char *classname; | |
fc04eb16 | 829 | ithread *thread; |
f4cc38af JH |
830 | int list_context; |
831 | IV count = 0; | |
ead32952 | 832 | int want_running; |
f4cc38af JH |
833 | PPCODE: |
834 | /* Class method only */ | |
835 | if (SvROK(ST(0))) | |
ead32952 | 836 | Perl_croak(aTHX_ "Usage: threads->list(...)"); |
f4cc38af JH |
837 | classname = (char *)SvPV_nolen(ST(0)); |
838 | ||
839 | /* Calling context */ | |
840 | list_context = (GIMME_V == G_ARRAY); | |
841 | ||
ead32952 JH |
842 | /* Running or joinable parameter */ |
843 | if (items > 1) { | |
844 | want_running = SvTRUE(ST(1)); | |
845 | } | |
846 | ||
f4cc38af JH |
847 | /* Walk through threads list */ |
848 | MUTEX_LOCK(&create_destruct_mutex); | |
fc04eb16 JH |
849 | for (thread = threads->next; |
850 | thread != threads; | |
851 | thread = thread->next) | |
f4cc38af JH |
852 | { |
853 | /* Ignore detached or joined threads */ | |
fc04eb16 | 854 | if (thread->state & (PERL_ITHR_DETACHED|PERL_ITHR_JOINED)) { |
f4cc38af JH |
855 | continue; |
856 | } | |
ead32952 JH |
857 | |
858 | /* Filter per parameter */ | |
859 | if (items > 1) { | |
860 | if (want_running) { | |
861 | if (thread->state & PERL_ITHR_FINISHED) { | |
862 | continue; /* Not running */ | |
863 | } | |
864 | } else { | |
865 | if (! (thread->state & PERL_ITHR_FINISHED)) { | |
866 | continue; /* Still running - not joinable yet */ | |
867 | } | |
868 | } | |
869 | } | |
870 | ||
f4cc38af JH |
871 | /* Push object on stack if list context */ |
872 | if (list_context) { | |
fc04eb16 | 873 | XPUSHs(sv_2mortal(ithread_to_SV(aTHX_ Nullsv, thread, classname, TRUE))); |
f4cc38af JH |
874 | } |
875 | count++; | |
876 | } | |
877 | MUTEX_UNLOCK(&create_destruct_mutex); | |
878 | /* If scalar context, send back count */ | |
879 | if (! list_context) { | |
880 | XSRETURN_IV(count); | |
881 | } | |
678a9b6c AB |
882 | |
883 | ||
884 | void | |
f4cc38af JH |
885 | ithread_self(...) |
886 | PREINIT: | |
887 | char *classname; | |
fcea4b7c | 888 | ithread *thread; |
f4cc38af JH |
889 | CODE: |
890 | /* Class method only */ | |
891 | if (SvROK(ST(0))) | |
892 | Perl_croak(aTHX_ "Usage: threads->self()"); | |
893 | classname = (char *)SvPV_nolen(ST(0)); | |
894 | ||
fcea4b7c JH |
895 | thread = S_ithread_get(aTHX); |
896 | ||
897 | ST(0) = sv_2mortal(ithread_to_SV(aTHX_ Nullsv, thread, classname, TRUE)); | |
f4cc38af | 898 | /* XSRETURN(1); - implied */ |
47ba8780 | 899 | |
47ba8780 AB |
900 | |
901 | void | |
f4cc38af JH |
902 | ithread_tid(...) |
903 | PREINIT: | |
904 | ithread *thread; | |
905 | CODE: | |
906 | thread = SV_to_ithread(aTHX_ ST(0)); | |
907 | XST_mUV(0, thread->tid); | |
908 | /* XSRETURN(1); - implied */ | |
909 | ||
e1c44605 | 910 | |
f9dff5f5 | 911 | void |
f4cc38af JH |
912 | ithread_join(...) |
913 | PREINIT: | |
fcea4b7c JH |
914 | ithread *thread; |
915 | int join_err; | |
f4cc38af JH |
916 | AV *params; |
917 | int len; | |
918 | int ii; | |
fcea4b7c JH |
919 | #ifdef WIN32 |
920 | DWORD waitcode; | |
921 | #else | |
922 | void *retval; | |
923 | #endif | |
f4cc38af JH |
924 | PPCODE: |
925 | /* Object method only */ | |
926 | if (! sv_isobject(ST(0))) | |
927 | Perl_croak(aTHX_ "Usage: $thr->join()"); | |
928 | ||
fcea4b7c JH |
929 | /* Check if the thread is joinable */ |
930 | thread = SV_to_ithread(aTHX_ ST(0)); | |
931 | MUTEX_LOCK(&thread->mutex); | |
932 | join_err = (thread->state & (PERL_ITHR_DETACHED|PERL_ITHR_JOINED)); | |
933 | MUTEX_UNLOCK(&thread->mutex); | |
934 | if (join_err) { | |
935 | if (join_err & PERL_ITHR_DETACHED) { | |
936 | Perl_croak(aTHX_ "Cannot join a detached thread"); | |
937 | } else { | |
938 | Perl_croak(aTHX_ "Thread already joined"); | |
939 | } | |
940 | } | |
941 | ||
942 | /* Join the thread */ | |
943 | #ifdef WIN32 | |
944 | waitcode = WaitForSingleObject(thread->handle, INFINITE); | |
945 | #else | |
946 | pthread_join(thread->thr, &retval); | |
947 | #endif | |
948 | ||
949 | MUTEX_LOCK(&thread->mutex); | |
950 | /* Mark as joined */ | |
951 | thread->state |= PERL_ITHR_JOINED; | |
952 | ||
953 | /* Get the return value from the call_sv */ | |
954 | { | |
955 | AV *params_copy; | |
956 | PerlInterpreter *other_perl; | |
957 | CLONE_PARAMS clone_params; | |
958 | ithread *current_thread; | |
959 | ||
960 | params_copy = (AV *)SvRV(thread->params); | |
961 | other_perl = thread->interp; | |
962 | clone_params.stashes = newAV(); | |
963 | clone_params.flags = CLONEf_JOIN_IN; | |
964 | PL_ptr_table = ptr_table_new(); | |
965 | current_thread = S_ithread_get(aTHX); | |
966 | S_ithread_set(aTHX_ thread); | |
967 | /* Ensure 'meaningful' addresses retain their meaning */ | |
968 | ptr_table_store(PL_ptr_table, &other_perl->Isv_undef, &PL_sv_undef); | |
969 | ptr_table_store(PL_ptr_table, &other_perl->Isv_no, &PL_sv_no); | |
970 | ptr_table_store(PL_ptr_table, &other_perl->Isv_yes, &PL_sv_yes); | |
971 | params = (AV *)sv_dup((SV*)params_copy, &clone_params); | |
972 | S_ithread_set(aTHX_ current_thread); | |
973 | SvREFCNT_dec(clone_params.stashes); | |
974 | SvREFCNT_inc(params); | |
975 | ptr_table_free(PL_ptr_table); | |
976 | PL_ptr_table = NULL; | |
977 | } | |
978 | ||
979 | /* We are finished with the thread */ | |
980 | S_ithread_clear(aTHX_ thread); | |
981 | MUTEX_UNLOCK(&thread->mutex); | |
982 | ||
4dcb9e53 JH |
983 | MUTEX_LOCK(&create_destruct_mutex); |
984 | joinable_threads--; | |
985 | MUTEX_UNLOCK(&create_destruct_mutex); | |
986 | ||
fcea4b7c | 987 | /* If no return values, then just return */ |
f4cc38af JH |
988 | if (! params) { |
989 | XSRETURN_UNDEF; | |
990 | } | |
991 | ||
992 | /* Put return values on stack */ | |
993 | len = (int)AvFILL(params); | |
994 | for (ii=0; ii <= len; ii++) { | |
995 | SV* param = av_shift(params); | |
996 | XPUSHs(sv_2mortal(param)); | |
997 | } | |
998 | ||
999 | /* Free return value array */ | |
1000 | SvREFCNT_dec(params); | |
1001 | ||
1002 | ||
1003 | void | |
1004 | ithread_yield(...) | |
1005 | CODE: | |
1006 | YIELD; | |
1007 | ||
1008 | ||
1009 | void | |
1010 | ithread_detach(...) | |
1011 | PREINIT: | |
1012 | ithread *thread; | |
fcea4b7c JH |
1013 | int detach_err; |
1014 | int cleanup; | |
f4cc38af JH |
1015 | CODE: |
1016 | thread = SV_to_ithread(aTHX_ ST(0)); | |
fcea4b7c JH |
1017 | MUTEX_LOCK(&thread->mutex); |
1018 | ||
1019 | /* Check if the thread is detachable */ | |
1020 | if ((detach_err = (thread->state & (PERL_ITHR_DETACHED|PERL_ITHR_JOINED)))) { | |
1021 | MUTEX_UNLOCK(&thread->mutex); | |
1022 | if (detach_err & PERL_ITHR_DETACHED) { | |
1023 | Perl_croak(aTHX_ "Thread already detached"); | |
1024 | } else { | |
1025 | Perl_croak(aTHX_ "Cannot detach a joined thread"); | |
1026 | } | |
1027 | } | |
1028 | ||
1029 | /* Detach the thread */ | |
1030 | thread->state |= PERL_ITHR_DETACHED; | |
1031 | #ifdef WIN32 | |
1032 | /* Windows has no 'detach thread' function */ | |
1033 | #else | |
1034 | PERL_THREAD_DETACH(thread->thr); | |
1035 | #endif | |
1036 | /* Cleanup if finished */ | |
1037 | cleanup = (thread->state & PERL_ITHR_FINISHED); | |
1038 | MUTEX_UNLOCK(&thread->mutex); | |
1039 | ||
4dcb9e53 JH |
1040 | MUTEX_LOCK(&create_destruct_mutex); |
1041 | if (cleanup) { | |
1042 | joinable_threads--; | |
1043 | } else { | |
1044 | running_threads--; | |
1045 | detached_threads++; | |
1046 | } | |
1047 | MUTEX_UNLOCK(&create_destruct_mutex); | |
1048 | ||
1049 | if (cleanup) { | |
fcea4b7c | 1050 | S_ithread_destruct(aTHX_ thread); |
4dcb9e53 | 1051 | } |
f4cc38af | 1052 | |
47ba8780 AB |
1053 | |
1054 | void | |
c0003851 JH |
1055 | ithread_kill(...) |
1056 | PREINIT: | |
1057 | ithread *thread; | |
1058 | char *sig_name; | |
1059 | IV signal; | |
1060 | CODE: | |
1061 | /* Must have safe signals */ | |
1062 | if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG) | |
4dcb9e53 | 1063 | Perl_croak(aTHX_ "Cannot signal threads without safe signals"); |
c0003851 JH |
1064 | |
1065 | /* Object method only */ | |
1066 | if (! sv_isobject(ST(0))) | |
1067 | Perl_croak(aTHX_ "Usage: $thr->kill('SIG...')"); | |
1068 | ||
c0003851 JH |
1069 | /* Get signal */ |
1070 | sig_name = SvPV_nolen(ST(1)); | |
1071 | if (isALPHA(*sig_name)) { | |
1072 | if (*sig_name == 'S' && sig_name[1] == 'I' && sig_name[2] == 'G') | |
1073 | sig_name += 3; | |
404aaa48 | 1074 | if ((signal = whichsig(sig_name)) < 0) |
c0003851 JH |
1075 | Perl_croak(aTHX_ "Unrecognized signal name: %s", sig_name); |
1076 | } else | |
1077 | signal = SvIV(ST(1)); | |
1078 | ||
1079 | /* Set the signal for the thread */ | |
4dcb9e53 JH |
1080 | thread = SV_to_ithread(aTHX_ ST(0)); |
1081 | MUTEX_LOCK(&thread->mutex); | |
3ceb02cd | 1082 | if (thread->interp) { |
c0003851 JH |
1083 | dTHXa(thread->interp); |
1084 | PL_psig_pend[signal]++; | |
1085 | PL_sig_pending = 1; | |
1086 | } | |
4dcb9e53 | 1087 | MUTEX_UNLOCK(&thread->mutex); |
c0003851 JH |
1088 | |
1089 | /* Return the thread to allow for method chaining */ | |
1090 | ST(0) = ST(0); | |
1091 | /* XSRETURN(1); - implied */ | |
1092 | ||
1093 | ||
1094 | void | |
f4cc38af JH |
1095 | ithread_DESTROY(...) |
1096 | CODE: | |
fcea4b7c | 1097 | sv_unmagic(SvRV(ST(0)), PERL_MAGIC_shared_scalar); |
f4cc38af JH |
1098 | |
1099 | ||
1100 | void | |
1101 | ithread_equal(...) | |
fc04eb16 JH |
1102 | PREINIT: |
1103 | int are_equal = 0; | |
f4cc38af | 1104 | CODE: |
fc04eb16 | 1105 | /* Compares TIDs to determine thread equality */ |
f4cc38af JH |
1106 | if (sv_isobject(ST(0)) && sv_isobject(ST(1))) { |
1107 | ithread *thr1 = INT2PTR(ithread *, SvIV(SvRV(ST(0)))); | |
1108 | ithread *thr2 = INT2PTR(ithread *, SvIV(SvRV(ST(1)))); | |
fc04eb16 JH |
1109 | are_equal = (thr1->tid == thr2->tid); |
1110 | } | |
1111 | if (are_equal) { | |
1112 | XST_mYES(0); | |
f4cc38af | 1113 | } else { |
fc04eb16 | 1114 | /* Return 0 on false for backward compatibility */ |
f4cc38af JH |
1115 | XST_mIV(0, 0); |
1116 | } | |
1117 | /* XSRETURN(1); - implied */ | |
1118 | ||
47ba8780 | 1119 | |
47ba8780 | 1120 | void |
f4cc38af JH |
1121 | ithread_object(...) |
1122 | PREINIT: | |
1123 | char *classname; | |
1124 | UV tid; | |
fc04eb16 | 1125 | ithread *thread; |
f4cc38af JH |
1126 | int found = 0; |
1127 | CODE: | |
1128 | /* Class method only */ | |
1129 | if (SvROK(ST(0))) | |
1130 | Perl_croak(aTHX_ "Usage: threads->object($tid)"); | |
1131 | classname = (char *)SvPV_nolen(ST(0)); | |
1132 | ||
1133 | if ((items < 2) || ! SvOK(ST(1))) { | |
1134 | XSRETURN_UNDEF; | |
1135 | } | |
1136 | ||
fc04eb16 | 1137 | /* threads->object($tid) */ |
f4cc38af JH |
1138 | tid = SvUV(ST(1)); |
1139 | ||
1140 | /* Walk through threads list */ | |
1141 | MUTEX_LOCK(&create_destruct_mutex); | |
fc04eb16 JH |
1142 | for (thread = threads->next; |
1143 | thread != threads; | |
1144 | thread = thread->next) | |
f4cc38af JH |
1145 | { |
1146 | /* Look for TID, but ignore detached or joined threads */ | |
fc04eb16 JH |
1147 | if ((thread->tid != tid) || |
1148 | (thread->state & (PERL_ITHR_DETACHED|PERL_ITHR_JOINED))) | |
f4cc38af JH |
1149 | { |
1150 | continue; | |
1151 | } | |
1152 | /* Put object on stack */ | |
fc04eb16 | 1153 | ST(0) = sv_2mortal(ithread_to_SV(aTHX_ Nullsv, thread, classname, TRUE)); |
f4cc38af JH |
1154 | found = 1; |
1155 | break; | |
1156 | } | |
1157 | MUTEX_UNLOCK(&create_destruct_mutex); | |
1158 | if (! found) { | |
1159 | XSRETURN_UNDEF; | |
1160 | } | |
1161 | /* XSRETURN(1); - implied */ | |
1162 | ||
1163 | ||
1164 | void | |
1165 | ithread__handle(...); | |
1166 | PREINIT: | |
1167 | ithread *thread; | |
1168 | CODE: | |
1169 | thread = SV_to_ithread(aTHX_ ST(0)); | |
1170 | #ifdef WIN32 | |
fcea4b7c | 1171 | XST_mUV(0, PTR2UV(&thread->handle)); |
f4cc38af | 1172 | #else |
75ba4ae2 | 1173 | XST_mUV(0, PTR2UV(&thread->thr)); |
f4cc38af JH |
1174 | #endif |
1175 | /* XSRETURN(1); - implied */ | |
68795e93 | 1176 | |
514612b7 JH |
1177 | |
1178 | void | |
1179 | ithread_get_stack_size(...) | |
1180 | PREINIT: | |
1181 | IV stack_size; | |
1182 | CODE: | |
1183 | if (sv_isobject(ST(0))) { | |
1184 | /* $thr->get_stack_size() */ | |
1185 | ithread *thread = INT2PTR(ithread *, SvIV(SvRV(ST(0)))); | |
1186 | stack_size = thread->stack_size; | |
1187 | } else { | |
1188 | /* threads->get_stack_size() */ | |
1189 | stack_size = default_stack_size; | |
1190 | } | |
1191 | XST_mIV(0, stack_size); | |
1192 | /* XSRETURN(1); - implied */ | |
1193 | ||
1194 | ||
1195 | void | |
1196 | ithread_set_stack_size(...) | |
1197 | PREINIT: | |
1198 | IV old_size; | |
1199 | CODE: | |
1200 | if (items != 2) | |
1201 | Perl_croak(aTHX_ "Usage: threads->set_stack_size($size)"); | |
1202 | if (sv_isobject(ST(0))) | |
1203 | Perl_croak(aTHX_ "Cannot change stack size of an existing thread"); | |
1204 | ||
1205 | old_size = default_stack_size; | |
1206 | default_stack_size = good_stack_size(aTHX_ SvIV(ST(1))); | |
1207 | XST_mIV(0, old_size); | |
1208 | /* XSRETURN(1); - implied */ | |
1209 | ||
ead32952 JH |
1210 | |
1211 | void | |
1212 | ithread_is_running(...) | |
1213 | PREINIT: | |
1214 | ithread *thread; | |
1215 | CODE: | |
1216 | /* Object method only */ | |
1217 | if (! sv_isobject(ST(0))) | |
1218 | Perl_croak(aTHX_ "Usage: $thr->is_running()"); | |
1219 | ||
1220 | thread = INT2PTR(ithread *, SvIV(SvRV(ST(0)))); | |
1221 | MUTEX_LOCK(&thread->mutex); | |
1222 | ST(0) = (thread->state & PERL_ITHR_FINISHED) ? &PL_sv_no : &PL_sv_yes; | |
1223 | MUTEX_UNLOCK(&thread->mutex); | |
1224 | /* XSRETURN(1); - implied */ | |
1225 | ||
1226 | ||
1227 | void | |
1228 | ithread_is_detached(...) | |
1229 | PREINIT: | |
1230 | ithread *thread; | |
1231 | CODE: | |
1232 | thread = SV_to_ithread(aTHX_ ST(0)); | |
1233 | MUTEX_LOCK(&thread->mutex); | |
1234 | ST(0) = (thread->state & PERL_ITHR_DETACHED) ? &PL_sv_yes : &PL_sv_no; | |
1235 | MUTEX_UNLOCK(&thread->mutex); | |
1236 | /* XSRETURN(1); - implied */ | |
1237 | ||
1238 | ||
1239 | void | |
1240 | ithread_is_joinable(...) | |
1241 | PREINIT: | |
1242 | ithread *thread; | |
1243 | CODE: | |
1244 | /* Object method only */ | |
1245 | if (! sv_isobject(ST(0))) | |
1246 | Perl_croak(aTHX_ "Usage: $thr->is_joinable()"); | |
1247 | ||
1248 | thread = INT2PTR(ithread *, SvIV(SvRV(ST(0)))); | |
1249 | MUTEX_LOCK(&thread->mutex); | |
1250 | ST(0) = ((thread->state & PERL_ITHR_FINISHED) && | |
1251 | ! (thread->state & (PERL_ITHR_DETACHED|PERL_ITHR_JOINED))) | |
1252 | ? &PL_sv_yes : &PL_sv_no; | |
1253 | MUTEX_UNLOCK(&thread->mutex); | |
1254 | /* XSRETURN(1); - implied */ | |
1255 | ||
1256 | ||
1257 | void | |
1258 | ithread_wantarray(...) | |
1259 | PREINIT: | |
1260 | ithread *thread; | |
1261 | CODE: | |
1262 | thread = SV_to_ithread(aTHX_ ST(0)); | |
1263 | MUTEX_LOCK(&thread->mutex); | |
1264 | ST(0) = (thread->gimme & G_ARRAY) ? &PL_sv_yes : | |
1265 | (thread->gimme & G_VOID) ? &PL_sv_undef | |
1266 | /* G_SCALAR */ : &PL_sv_no; | |
1267 | MUTEX_UNLOCK(&thread->mutex); | |
1268 | /* XSRETURN(1); - implied */ | |
1269 | ||
73e09c8f JH |
1270 | #endif /* USE_ITHREADS */ |
1271 | ||
fc04eb16 | 1272 | |
68795e93 NIS |
1273 | BOOT: |
1274 | { | |
73e09c8f | 1275 | #ifdef USE_ITHREADS |
fc04eb16 JH |
1276 | /* The 'main' thread is thread 0. |
1277 | * It is detached (unjoinable) and immortal. | |
1278 | */ | |
62375a60 | 1279 | |
fc04eb16 JH |
1280 | ithread *thread; |
1281 | MY_CXT_INIT; | |
1282 | ||
1283 | PL_perl_destruct_level = 2; | |
1284 | MUTEX_INIT(&create_destruct_mutex); | |
1285 | MUTEX_LOCK(&create_destruct_mutex); | |
1286 | ||
1287 | PL_threadhook = &Perl_ithread_hook; | |
1288 | ||
1289 | thread = (ithread *)PerlMemShared_malloc(sizeof(ithread)); | |
1290 | if (! thread) { | |
1291 | PerlLIO_write(PerlIO_fileno(Perl_error_log), PL_no_mem, strlen(PL_no_mem)); | |
1292 | my_exit(1); | |
1293 | } | |
1294 | Zero(thread, 1, ithread); | |
1295 | ||
fc04eb16 JH |
1296 | MUTEX_INIT(&thread->mutex); |
1297 | ||
1298 | thread->tid = tid_counter++; /* Thread 0 */ | |
1299 | ||
1300 | /* Head of the threads list */ | |
1301 | threads = thread; | |
1302 | thread->next = thread; | |
1303 | thread->prev = thread; | |
1304 | ||
1305 | thread->count = 1; /* Immortal */ | |
1306 | ||
1307 | thread->interp = aTHX; | |
1308 | thread->state = PERL_ITHR_DETACHED; /* Detached */ | |
514612b7 | 1309 | thread->stack_size = default_stack_size; |
fc04eb16 JH |
1310 | # ifdef WIN32 |
1311 | thread->thr = GetCurrentThreadId(); | |
1312 | # else | |
1313 | thread->thr = pthread_self(); | |
1314 | # endif | |
1315 | ||
fc04eb16 JH |
1316 | S_ithread_set(aTHX_ thread); |
1317 | MUTEX_UNLOCK(&create_destruct_mutex); | |
73e09c8f | 1318 | #endif /* USE_ITHREADS */ |
68795e93 | 1319 | } |