Commit | Line | Data |
afe38520 |
1 | /* shared.xs |
68795e93 |
2 | * |
afe38520 |
3 | * Copyright (c) 2001-2002, Larry Wall |
68795e93 |
4 | * |
5 | * You may distribute under the terms of either the GNU General Public |
6 | * License or the Artistic License, as specified in the README file. |
7 | * |
21312124 |
8 | * "Hand any two wizards a piece of rope and they would instinctively pull in |
9 | * opposite directions." |
10 | * --Sourcery |
11 | * |
12 | * Contributed by Arthur Bergman arthur@contiller.se |
13 | * pulled in the (an)other direction by Nick Ing-Simmons nick@ing-simmons.net |
14 | */ |
68795e93 |
15 | |
16 | #define PERL_NO_GET_CONTEXT |
b050c948 |
17 | #include "EXTERN.h" |
18 | #include "perl.h" |
19 | #include "XSUB.h" |
20 | |
73e09c8f |
21 | #ifdef USE_ITHREADS |
22 | |
21312124 |
23 | #define SHAREDSvPTR(a) ((a)->sv) |
24 | |
25 | /* |
26 | * The shared things need an intepreter to live in ... |
27 | */ |
28 | PerlInterpreter *PL_sharedsv_space; /* The shared sv space */ |
29 | /* To access shared space we fake aTHX in this scope and thread's context */ |
057e91b3 |
30 | |
31 | /* bug #24255: we include ENTER+SAVETMPS/FREETMPS+LEAVE with |
32 | * SHARED_CONTEXT/CALLER_CONTEXT macros, so that any mortals etc created |
1011f542 |
33 | * while in the shared interpreter context don't languish */ |
057e91b3 |
34 | |
35 | #define SHARED_CONTEXT \ |
36 | STMT_START { \ |
37 | PERL_SET_CONTEXT((aTHX = PL_sharedsv_space)); \ |
38 | ENTER; \ |
39 | SAVETMPS; \ |
40 | } STMT_END |
21312124 |
41 | |
42 | /* So we need a way to switch back to the caller's context... */ |
43 | /* So we declare _another_ copy of the aTHX variable ... */ |
44 | #define dTHXc PerlInterpreter *caller_perl = aTHX |
057e91b3 |
45 | |
21312124 |
46 | /* and use it to switch back */ |
057e91b3 |
47 | #define CALLER_CONTEXT \ |
48 | STMT_START { \ |
49 | FREETMPS; \ |
50 | LEAVE; \ |
51 | PERL_SET_CONTEXT((aTHX = caller_perl)); \ |
52 | } STMT_END |
21312124 |
53 | |
54 | /* |
55 | * Only one thread at a time is allowed to mess with shared space. |
56 | */ |
a446a88f |
57 | |
6d56dc1c |
58 | typedef struct |
59 | { |
60 | perl_mutex mutex; |
6d56dc1c |
61 | PerlInterpreter *owner; |
62 | I32 locks; |
6b85e4fe |
63 | perl_cond cond; |
64 | #ifdef DEBUG_LOCKS |
65 | char * file; |
66 | int line; |
67 | #endif |
6d56dc1c |
68 | } recursive_lock_t; |
69 | |
70 | recursive_lock_t PL_sharedsv_lock; /* Mutex protecting the shared sv space */ |
71 | |
72 | void |
73 | recursive_lock_init(pTHX_ recursive_lock_t *lock) |
74 | { |
75 | Zero(lock,1,recursive_lock_t); |
76 | MUTEX_INIT(&lock->mutex); |
77 | COND_INIT(&lock->cond); |
78 | } |
79 | |
a39edb3a |
80 | void |
579f9913 |
81 | recursive_lock_destroy(pTHX_ recursive_lock_t *lock) |
82 | { |
83 | MUTEX_DESTROY(&lock->mutex); |
84 | COND_DESTROY(&lock->cond); |
85 | } |
86 | |
6d56dc1c |
87 | void |
88 | recursive_lock_release(pTHX_ recursive_lock_t *lock) |
89 | { |
90 | MUTEX_LOCK(&lock->mutex); |
91 | if (lock->owner != aTHX) { |
92 | MUTEX_UNLOCK(&lock->mutex); |
93 | } |
94 | else { |
95 | if (--lock->locks == 0) { |
96 | lock->owner = NULL; |
97 | COND_SIGNAL(&lock->cond); |
98 | } |
99 | } |
100 | MUTEX_UNLOCK(&lock->mutex); |
101 | } |
a446a88f |
102 | |
6d56dc1c |
103 | void |
6b85e4fe |
104 | recursive_lock_acquire(pTHX_ recursive_lock_t *lock,char *file,int line) |
6d56dc1c |
105 | { |
106 | assert(aTHX); |
107 | MUTEX_LOCK(&lock->mutex); |
108 | if (lock->owner == aTHX) { |
109 | lock->locks++; |
110 | } |
111 | else { |
6b85e4fe |
112 | while (lock->owner) { |
113 | #ifdef DEBUG_LOCKS |
114 | Perl_warn(aTHX_ " %p waiting - owned by %p %s:%d\n", |
115 | aTHX, lock->owner, lock->file, lock->line); |
116 | #endif |
6d56dc1c |
117 | COND_WAIT(&lock->cond,&lock->mutex); |
6b85e4fe |
118 | } |
6d56dc1c |
119 | lock->locks = 1; |
120 | lock->owner = aTHX; |
6b85e4fe |
121 | #ifdef DEBUG_LOCKS |
122 | lock->file = file; |
123 | lock->line = line; |
124 | #endif |
6d56dc1c |
125 | } |
126 | MUTEX_UNLOCK(&lock->mutex); |
6b85e4fe |
127 | SAVEDESTRUCTOR_X(recursive_lock_release,lock); |
6d56dc1c |
128 | } |
129 | |
130 | #define ENTER_LOCK STMT_START { \ |
131 | ENTER; \ |
6b85e4fe |
132 | recursive_lock_acquire(aTHX_ &PL_sharedsv_lock, __FILE__, __LINE__); \ |
a446a88f |
133 | } STMT_END |
21312124 |
134 | |
6d56dc1c |
135 | #define LEAVE_LOCK LEAVE |
136 | |
21312124 |
137 | |
138 | /* A common idiom is to acquire access and switch in ... */ |
139 | #define SHARED_EDIT STMT_START { \ |
6d56dc1c |
140 | ENTER_LOCK; \ |
21312124 |
141 | SHARED_CONTEXT; \ |
142 | } STMT_END |
143 | |
144 | /* then switch out and release access. */ |
145 | #define SHARED_RELEASE STMT_START { \ |
146 | CALLER_CONTEXT; \ |
6d56dc1c |
147 | LEAVE_LOCK; \ |
21312124 |
148 | } STMT_END |
85e0a142 |
149 | |
21312124 |
150 | |
151 | /* |
152 | |
153 | Shared SV |
154 | |
155 | Shared SV is a structure for keeping the backend storage |
156 | of shared svs. |
157 | |
158 | Shared-ness really only needs the SV * - the rest is for locks. |
159 | (Which suggests further space optimization ... ) |
160 | |
161 | */ |
68795e93 |
162 | |
163 | typedef struct { |
21312124 |
164 | SV *sv; /* The actual SV - in shared space */ |
6d56dc1c |
165 | recursive_lock_t lock; |
68795e93 |
166 | perl_cond user_cond; /* For user-level conditions */ |
68795e93 |
167 | } shared_sv; |
168 | |
21312124 |
169 | /* The SV in shared-space has a back-pointer to the shared_sv |
170 | struct associated with it PERL_MAGIC_ext. |
68795e93 |
171 | |
21312124 |
172 | The vtable used has just one entry - when the SV goes away |
173 | we free the memory for the above. |
68795e93 |
174 | |
21312124 |
175 | */ |
68795e93 |
176 | |
21312124 |
177 | int |
178 | sharedsv_shared_mg_free(pTHX_ SV *sv, MAGIC *mg) |
179 | { |
180 | shared_sv *shared = (shared_sv *) mg->mg_ptr; |
6b85e4fe |
181 | assert( aTHX == PL_sharedsv_space ); |
21312124 |
182 | if (shared) { |
cab6ddb1 |
183 | recursive_lock_destroy(aTHX_ &shared->lock); |
579f9913 |
184 | COND_DESTROY(&shared->user_cond); |
21312124 |
185 | PerlMemShared_free(shared); |
186 | mg->mg_ptr = NULL; |
187 | } |
188 | return 0; |
189 | } |
190 | |
21312124 |
191 | MGVTBL sharedsv_shared_vtbl = { |
192 | 0, /* get */ |
193 | 0, /* set */ |
194 | 0, /* len */ |
195 | 0, /* clear */ |
196 | sharedsv_shared_mg_free, /* free */ |
197 | 0, /* copy */ |
198 | 0, /* dup */ |
199 | }; |
200 | |
201 | /* Access to shared things is heavily based on MAGIC - in mg.h/mg.c/sv.c sense */ |
202 | |
203 | /* In any thread that has access to a shared thing there is a "proxy" |
204 | for it in its own space which has 'MAGIC' associated which accesses |
205 | the shared thing. |
206 | */ |
207 | |
208 | MGVTBL sharedsv_scalar_vtbl; /* scalars have this vtable */ |
209 | MGVTBL sharedsv_array_vtbl; /* hashes and arrays have this - like 'tie' */ |
210 | MGVTBL sharedsv_elem_vtbl; /* elements of hashes and arrays have this |
211 | _AS WELL AS_ the scalar magic */ |
212 | |
213 | /* The sharedsv_elem_vtbl associates the element with the array/hash and |
214 | the sharedsv_scalar_vtbl associates it with the value |
215 | */ |
216 | |
6b85e4fe |
217 | |
218 | /* Accessor to convert threads::shared::tie objects back shared_sv * */ |
219 | shared_sv * |
220 | SV_to_sharedsv(pTHX_ SV *sv) |
221 | { |
222 | shared_sv *shared = 0; |
223 | if (SvROK(sv)) |
224 | { |
225 | shared = INT2PTR(shared_sv *, SvIV(SvRV(sv))); |
226 | } |
227 | return shared; |
228 | } |
229 | |
21312124 |
230 | =for apidoc sharedsv_find |
231 | |
6b85e4fe |
232 | Given a private side SV tries to find if the SV has a shared backend, |
21312124 |
233 | by looking for the magic. |
234 | |
235 | =cut |
236 | |
237 | shared_sv * |
238 | Perl_sharedsv_find(pTHX_ SV *sv) |
239 | { |
240 | MAGIC *mg; |
a446a88f |
241 | if (SvTYPE(sv) >= SVt_PVMG) { |
242 | switch(SvTYPE(sv)) { |
243 | case SVt_PVAV: |
244 | case SVt_PVHV: |
245 | if ((mg = mg_find(sv, PERL_MAGIC_tied)) |
246 | && mg->mg_virtual == &sharedsv_array_vtbl) { |
21312124 |
247 | return (shared_sv *) mg->mg_ptr; |
248 | } |
249 | break; |
a446a88f |
250 | default: |
6b85e4fe |
251 | /* This should work for elements as well as they |
252 | * have scalar magic as well as their element magic |
253 | */ |
a446a88f |
254 | if ((mg = mg_find(sv, PERL_MAGIC_shared_scalar)) |
255 | && mg->mg_virtual == &sharedsv_scalar_vtbl) { |
21312124 |
256 | return (shared_sv *) mg->mg_ptr; |
6b85e4fe |
257 | } |
a446a88f |
258 | break; |
21312124 |
259 | } |
260 | } |
6b85e4fe |
261 | /* Just for tidyness of API also handle tie objects */ |
262 | if (SvROK(sv) && sv_derived_from(sv, "threads::shared::tie")) { |
263 | return SV_to_sharedsv(aTHX_ sv); |
264 | } |
21312124 |
265 | return NULL; |
266 | } |
68795e93 |
267 | |
268 | /* |
21312124 |
269 | * Almost all the pain is in this routine. |
270 | * |
271 | */ |
68795e93 |
272 | |
21312124 |
273 | shared_sv * |
274 | Perl_sharedsv_associate(pTHX_ SV **psv, SV *ssv, shared_sv *data) |
275 | { |
21312124 |
276 | dTHXc; |
a446a88f |
277 | MAGIC *mg = 0; |
6b85e4fe |
278 | SV *sv = (psv) ? *psv : Nullsv; |
a446a88f |
279 | |
280 | /* If we are asked for an private ops we need a thread */ |
281 | assert ( aTHX != PL_sharedsv_space ); |
282 | |
283 | /* To avoid need for recursive locks require caller to hold lock */ |
6d56dc1c |
284 | assert ( PL_sharedsv_lock.owner == aTHX ); |
6b85e4fe |
285 | |
286 | /* First try and get existing global data structure */ |
68795e93 |
287 | |
21312124 |
288 | /* Try shared SV as 1st choice */ |
a446a88f |
289 | if (!data && ssv && SvTYPE(ssv) >= SVt_PVMG) { |
436c6dd3 |
290 | if( (mg = mg_find(ssv, PERL_MAGIC_ext)) ){ |
21312124 |
291 | data = (shared_sv *) mg->mg_ptr; |
292 | } |
293 | } |
6b85e4fe |
294 | |
295 | /* Next see if private SV is associated with something */ |
296 | if (!data && sv) { |
297 | data = Perl_sharedsv_find(aTHX_ sv); |
21312124 |
298 | } |
6b85e4fe |
299 | |
21312124 |
300 | /* If neither of those then create a new one */ |
301 | if (!data) { |
6b85e4fe |
302 | SHARED_CONTEXT; |
b0cd0593 |
303 | if (!ssv) { |
6b85e4fe |
304 | ssv = newSV(0); |
b0cd0593 |
305 | SvREFCNT(ssv) = 0; |
306 | } |
21312124 |
307 | data = PerlMemShared_malloc(sizeof(shared_sv)); |
308 | Zero(data,1,shared_sv); |
6b85e4fe |
309 | SHAREDSvPTR(data) = ssv; |
310 | /* Tag shared side SV with data pointer */ |
311 | sv_magicext(ssv, ssv, PERL_MAGIC_ext, &sharedsv_shared_vtbl, |
312 | (char *)data, 0); |
6d56dc1c |
313 | recursive_lock_init(aTHX_ &data->lock); |
21312124 |
314 | COND_INIT(&data->user_cond); |
6b85e4fe |
315 | CALLER_CONTEXT; |
21312124 |
316 | } |
68795e93 |
317 | |
21312124 |
318 | if (!ssv) |
319 | ssv = SHAREDSvPTR(data); |
6b85e4fe |
320 | if (!SHAREDSvPTR(data)) |
321 | SHAREDSvPTR(data) = ssv; |
322 | |
323 | /* If we know type upgrade shared side SV */ |
324 | if (sv && SvTYPE(ssv) < SvTYPE(sv)) { |
21312124 |
325 | SHARED_CONTEXT; |
21312124 |
326 | sv_upgrade(ssv, SvTYPE(*psv)); |
aa49c2f8 |
327 | if (SvTYPE(ssv) == SVt_PVAV) /* #24061 */ |
328 | AvREAL_on(ssv); |
21312124 |
329 | CALLER_CONTEXT; |
330 | } |
68795e93 |
331 | |
21312124 |
332 | /* Now if requested allocate private SV */ |
6b85e4fe |
333 | if (psv && !sv) { |
334 | *psv = sv = newSV(0); |
21312124 |
335 | } |
336 | |
337 | /* Finally if private SV exists check and add magic */ |
6b85e4fe |
338 | if (sv) { |
a446a88f |
339 | MAGIC *mg = 0; |
6b85e4fe |
340 | if (SvTYPE(sv) < SvTYPE(ssv)) { |
341 | sv_upgrade(sv, SvTYPE(ssv)); |
342 | } |
21312124 |
343 | switch(SvTYPE(sv)) { |
344 | case SVt_PVAV: |
345 | case SVt_PVHV: |
346 | if (!(mg = mg_find(sv, PERL_MAGIC_tied)) |
6b85e4fe |
347 | || mg->mg_virtual != &sharedsv_array_vtbl |
348 | || (shared_sv *) mg->mg_ptr != data) { |
a446a88f |
349 | SV *obj = newSV(0); |
350 | sv_setref_iv(obj, "threads::shared::tie",PTR2IV(data)); |
6b85e4fe |
351 | if (mg) { |
21312124 |
352 | sv_unmagic(sv, PERL_MAGIC_tied); |
6b85e4fe |
353 | } |
a446a88f |
354 | mg = sv_magicext(sv, obj, PERL_MAGIC_tied, &sharedsv_array_vtbl, |
21312124 |
355 | (char *) data, 0); |
356 | mg->mg_flags |= (MGf_COPY|MGf_DUP); |
6b85e4fe |
357 | SvREFCNT_inc(ssv); |
a446a88f |
358 | SvREFCNT_dec(obj); |
5c360ac5 |
359 | if(SvOBJECT(ssv)) { |
360 | STRLEN len; |
361 | char* stash_ptr = SvPV((SV*) SvSTASH(ssv), len); |
362 | HV* stash = gv_stashpvn(stash_ptr, len, TRUE); |
363 | SvOBJECT_on(sv); |
364 | SvSTASH(sv) = (HV*)SvREFCNT_inc(stash); |
365 | } |
21312124 |
366 | } |
367 | break; |
368 | |
369 | default: |
6b85e4fe |
370 | if ((SvTYPE(sv) < SVt_PVMG) |
371 | || !(mg = mg_find(sv, PERL_MAGIC_shared_scalar)) |
372 | || mg->mg_virtual != &sharedsv_scalar_vtbl |
373 | || (shared_sv *) mg->mg_ptr != data) { |
374 | if (mg) { |
21312124 |
375 | sv_unmagic(sv, PERL_MAGIC_shared_scalar); |
6b85e4fe |
376 | } |
21312124 |
377 | mg = sv_magicext(sv, Nullsv, PERL_MAGIC_shared_scalar, |
378 | &sharedsv_scalar_vtbl, (char *)data, 0); |
379 | mg->mg_flags |= (MGf_COPY|MGf_DUP); |
6b85e4fe |
380 | SvREFCNT_inc(ssv); |
21312124 |
381 | } |
382 | break; |
383 | } |
6d56dc1c |
384 | assert ( Perl_sharedsv_find(aTHX_ *psv) == data ); |
21312124 |
385 | } |
21312124 |
386 | return data; |
387 | } |
68795e93 |
388 | |
389 | void |
21312124 |
390 | Perl_sharedsv_free(pTHX_ shared_sv *shared) |
68795e93 |
391 | { |
21312124 |
392 | if (shared) { |
393 | dTHXc; |
394 | SHARED_EDIT; |
395 | SvREFCNT_dec(SHAREDSvPTR(shared)); |
396 | SHARED_RELEASE; |
397 | } |
68795e93 |
398 | } |
399 | |
21312124 |
400 | void |
401 | Perl_sharedsv_share(pTHX_ SV *sv) |
402 | { |
403 | switch(SvTYPE(sv)) { |
404 | case SVt_PVGV: |
405 | Perl_croak(aTHX_ "Cannot share globs yet"); |
406 | break; |
407 | |
408 | case SVt_PVCV: |
409 | Perl_croak(aTHX_ "Cannot share subs yet"); |
410 | break; |
85e0a142 |
411 | |
21312124 |
412 | default: |
6d56dc1c |
413 | ENTER_LOCK; |
21312124 |
414 | Perl_sharedsv_associate(aTHX_ &sv, 0, 0); |
6d56dc1c |
415 | LEAVE_LOCK; |
a446a88f |
416 | SvSETMAGIC(sv); |
417 | break; |
21312124 |
418 | } |
419 | } |
68795e93 |
420 | |
a0e036c1 |
421 | #if defined(WIN32) || defined(OS2) |
422 | # define ABS2RELMILLI(abs) \ |
423 | do { \ |
2666606c |
424 | abs -= (double)time(NULL); \ |
a0e036c1 |
425 | if (abs > 0) { abs *= 1000; } \ |
426 | else { abs = 0; } \ |
427 | } while (0) |
428 | #endif /* WIN32 || OS2 */ |
429 | |
430 | bool |
431 | Perl_sharedsv_cond_timedwait(perl_cond *cond, perl_mutex *mut, double abs) |
432 | { |
433 | #if defined(NETWARE) || defined(FAKE_THREADS) || defined(I_MACH_CTHREADS) |
434 | Perl_croak_nocontext("cond_timedwait not supported on this platform"); |
435 | #else |
436 | # ifdef WIN32 |
437 | int got_it = 0; |
438 | |
439 | ABS2RELMILLI(abs); |
440 | |
441 | cond->waiters++; |
442 | MUTEX_UNLOCK(mut); |
443 | /* See comments in win32/win32thread.h COND_WAIT vis-a-vis race */ |
444 | switch (WaitForSingleObject(cond->sem, abs)) { |
445 | case WAIT_OBJECT_0: got_it = 1; break; |
446 | case WAIT_TIMEOUT: break; |
447 | default: |
448 | /* WAIT_FAILED? WAIT_ABANDONED? others? */ |
449 | Perl_croak_nocontext("panic: cond_timedwait (%ld)",GetLastError()); |
450 | break; |
451 | } |
452 | MUTEX_LOCK(mut); |
2666606c |
453 | cond->waiters--; |
a0e036c1 |
454 | return got_it; |
455 | # else |
456 | # ifdef OS2 |
457 | int rc, got_it = 0; |
458 | STRLEN n_a; |
459 | |
460 | ABS2RELMILLI(abs); |
461 | |
462 | if ((rc = DosResetEventSem(*cond,&n_a)) && (rc != ERROR_ALREADY_RESET)) |
463 | Perl_rc = rc, croak_with_os2error("panic: cond_timedwait-reset"); |
464 | MUTEX_UNLOCK(mut); |
465 | if (CheckOSError(DosWaitEventSem(*cond,abs)) |
466 | && (rc != ERROR_INTERRUPT)) |
467 | croak_with_os2error("panic: cond_timedwait"); |
468 | if (rc == ERROR_INTERRUPT) errno = EINTR; |
469 | MUTEX_LOCK(mut); |
470 | return got_it; |
471 | # else /* hope you're I_PTHREAD! */ |
472 | struct timespec ts; |
473 | int got_it = 0; |
474 | |
475 | ts.tv_sec = (long)abs; |
476 | abs -= (NV)ts.tv_sec; |
477 | ts.tv_nsec = (long)(abs * 1000000000.0); |
478 | |
479 | switch (pthread_cond_timedwait(cond, mut, &ts)) { |
480 | case 0: got_it = 1; break; |
481 | case ETIMEDOUT: break; |
482 | default: |
483 | Perl_croak_nocontext("panic: cond_timedwait"); |
484 | break; |
485 | } |
486 | return got_it; |
487 | # endif /* OS2 */ |
488 | # endif /* WIN32 */ |
489 | #endif /* NETWARE || FAKE_THREADS || I_MACH_CTHREADS */ |
490 | } |
491 | |
21312124 |
492 | /* MAGIC (in mg.h sense) hooks */ |
68795e93 |
493 | |
21312124 |
494 | int |
495 | sharedsv_scalar_mg_get(pTHX_ SV *sv, MAGIC *mg) |
68795e93 |
496 | { |
21312124 |
497 | shared_sv *shared = (shared_sv *) mg->mg_ptr; |
6b85e4fe |
498 | assert(shared); |
21312124 |
499 | |
6d56dc1c |
500 | ENTER_LOCK; |
21312124 |
501 | if (SHAREDSvPTR(shared)) { |
502 | if (SvROK(SHAREDSvPTR(shared))) { |
a446a88f |
503 | SV *obj = Nullsv; |
504 | Perl_sharedsv_associate(aTHX_ &obj, SvRV(SHAREDSvPTR(shared)), NULL); |
505 | sv_setsv_nomg(sv, &PL_sv_undef); |
506 | SvRV(sv) = obj; |
507 | SvROK_on(sv); |
5c360ac5 |
508 | |
21312124 |
509 | } |
510 | else { |
a446a88f |
511 | sv_setsv_nomg(sv, SHAREDSvPTR(shared)); |
21312124 |
512 | } |
513 | } |
6d56dc1c |
514 | LEAVE_LOCK; |
21312124 |
515 | return 0; |
516 | } |
517 | |
6b85e4fe |
518 | void |
519 | sharedsv_scalar_store(pTHX_ SV *sv, shared_sv *shared) |
21312124 |
520 | { |
521 | dTHXc; |
21312124 |
522 | bool allowed = TRUE; |
21312124 |
523 | if (SvROK(sv)) { |
524 | shared_sv* target = Perl_sharedsv_find(aTHX_ SvRV(sv)); |
525 | if (target) { |
a446a88f |
526 | SV *tmp; |
527 | SHARED_CONTEXT; |
528 | tmp = newRV(SHAREDSvPTR(target)); |
529 | sv_setsv_nomg(SHAREDSvPTR(shared), tmp); |
21312124 |
530 | SvREFCNT_dec(tmp); |
5c360ac5 |
531 | if(SvOBJECT(SvRV(sv))) { |
532 | SV* fake_stash = newSVpv(HvNAME(SvSTASH(SvRV(sv))),0); |
533 | SvOBJECT_on(SHAREDSvPTR(target)); |
534 | SvSTASH(SHAREDSvPTR(target)) = (HV*)fake_stash; |
535 | } |
a446a88f |
536 | CALLER_CONTEXT; |
21312124 |
537 | } |
538 | else { |
539 | allowed = FALSE; |
540 | } |
541 | } |
542 | else { |
5c360ac5 |
543 | SvTEMP_off(sv); |
a446a88f |
544 | SHARED_CONTEXT; |
545 | sv_setsv_nomg(SHAREDSvPTR(shared), sv); |
5c360ac5 |
546 | if(SvOBJECT(sv)) { |
547 | SV* fake_stash = newSVpv(HvNAME(SvSTASH(sv)),0); |
548 | SvOBJECT_on(SHAREDSvPTR(shared)); |
549 | SvSTASH(SHAREDSvPTR(shared)) = (HV*)fake_stash; |
550 | } |
a446a88f |
551 | CALLER_CONTEXT; |
21312124 |
552 | } |
21312124 |
553 | if (!allowed) { |
554 | Perl_croak(aTHX_ "Invalid value for shared scalar"); |
555 | } |
6b85e4fe |
556 | } |
557 | |
558 | int |
559 | sharedsv_scalar_mg_set(pTHX_ SV *sv, MAGIC *mg) |
560 | { |
561 | shared_sv *shared; |
562 | ENTER_LOCK; |
563 | /* We call associate to potentially upgrade shared side SV */ |
564 | shared = Perl_sharedsv_associate(aTHX_ &sv, Nullsv, (shared_sv *) mg->mg_ptr); |
565 | assert(shared); |
566 | sharedsv_scalar_store(aTHX_ sv, shared); |
567 | LEAVE_LOCK; |
21312124 |
568 | return 0; |
68795e93 |
569 | } |
570 | |
21312124 |
571 | int |
572 | sharedsv_scalar_mg_free(pTHX_ SV *sv, MAGIC *mg) |
573 | { |
a446a88f |
574 | shared_sv *shared = (shared_sv *) mg->mg_ptr; |
eb31b78e |
575 | #if 0 |
a446a88f |
576 | assert (SvREFCNT(SHAREDSvPTR(shared)) < 1000); |
eb31b78e |
577 | #endif |
a446a88f |
578 | Perl_sharedsv_free(aTHX_ shared); |
579 | return 0; |
580 | } |
581 | |
582 | int |
583 | sharedsv_scalar_mg_clear(pTHX_ SV *sv, MAGIC *mg) |
584 | { |
21312124 |
585 | return 0; |
586 | } |
68795e93 |
587 | |
588 | /* |
21312124 |
589 | * Called during cloning of new threads |
590 | */ |
591 | int |
592 | sharedsv_scalar_mg_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *param) |
593 | { |
594 | shared_sv *shared = (shared_sv *) mg->mg_ptr; |
595 | if (shared) { |
596 | SvREFCNT_inc(SHAREDSvPTR(shared)); |
597 | } |
598 | return 0; |
599 | } |
68795e93 |
600 | |
21312124 |
601 | MGVTBL sharedsv_scalar_vtbl = { |
602 | sharedsv_scalar_mg_get, /* get */ |
603 | sharedsv_scalar_mg_set, /* set */ |
604 | 0, /* len */ |
a446a88f |
605 | sharedsv_scalar_mg_clear, /* clear */ |
21312124 |
606 | sharedsv_scalar_mg_free, /* free */ |
607 | 0, /* copy */ |
608 | sharedsv_scalar_mg_dup /* dup */ |
609 | }; |
68795e93 |
610 | |
21312124 |
611 | /* Now the arrays/hashes stuff */ |
21312124 |
612 | int |
613 | sharedsv_elem_mg_FETCH(pTHX_ SV *sv, MAGIC *mg) |
68795e93 |
614 | { |
21312124 |
615 | dTHXc; |
6b85e4fe |
616 | shared_sv *shared = SV_to_sharedsv(aTHX_ mg->mg_obj); |
21312124 |
617 | shared_sv *target = Perl_sharedsv_find(aTHX_ sv); |
618 | SV** svp; |
619 | |
a446a88f |
620 | assert ( shared ); |
621 | assert ( SHAREDSvPTR(shared) ); |
622 | |
6b85e4fe |
623 | ENTER_LOCK; |
21312124 |
624 | if (SvTYPE(SHAREDSvPTR(shared)) == SVt_PVAV) { |
a446a88f |
625 | assert ( mg->mg_ptr == 0 ); |
6b85e4fe |
626 | SHARED_CONTEXT; |
a446a88f |
627 | svp = av_fetch((AV*) SHAREDSvPTR(shared), mg->mg_len, 0); |
21312124 |
628 | } |
629 | else { |
6b85e4fe |
630 | char *key = mg->mg_ptr; |
631 | STRLEN len = mg->mg_len; |
a446a88f |
632 | assert ( mg->mg_ptr != 0 ); |
6b85e4fe |
633 | if (mg->mg_len == HEf_SVKEY) { |
634 | key = SvPV((SV *) mg->mg_ptr, len); |
635 | } |
636 | SHARED_CONTEXT; |
637 | svp = hv_fetch((HV*) SHAREDSvPTR(shared), key, len, 0); |
21312124 |
638 | } |
6b85e4fe |
639 | CALLER_CONTEXT; |
21312124 |
640 | if (svp) { |
6b85e4fe |
641 | /* Exists in the array */ |
642 | target = Perl_sharedsv_associate(aTHX_ &sv, *svp, target); |
643 | sv_setsv(sv, *svp); |
21312124 |
644 | } |
6b85e4fe |
645 | else { |
646 | /* Not in the array */ |
647 | sv_setsv(sv, &PL_sv_undef); |
68795e93 |
648 | } |
6b85e4fe |
649 | LEAVE_LOCK; |
21312124 |
650 | return 0; |
68795e93 |
651 | } |
652 | |
21312124 |
653 | int |
654 | sharedsv_elem_mg_STORE(pTHX_ SV *sv, MAGIC *mg) |
655 | { |
656 | dTHXc; |
6b85e4fe |
657 | shared_sv *shared = SV_to_sharedsv(aTHX_ mg->mg_obj); |
a446a88f |
658 | shared_sv *target; |
6b85e4fe |
659 | SV **svp; |
21312124 |
660 | /* Theory - SV itself is magically shared - and we have ordered the |
661 | magic such that by the time we get here it has been stored |
662 | to its shared counterpart |
663 | */ |
6d56dc1c |
664 | ENTER_LOCK; |
665 | assert(shared); |
666 | assert(SHAREDSvPTR(shared)); |
21312124 |
667 | if (SvTYPE(SHAREDSvPTR(shared)) == SVt_PVAV) { |
6b85e4fe |
668 | assert ( mg->mg_ptr == 0 ); |
669 | SHARED_CONTEXT; |
670 | svp = av_fetch((AV*) SHAREDSvPTR(shared), mg->mg_len, 1); |
21312124 |
671 | } |
672 | else { |
6b85e4fe |
673 | char *key = mg->mg_ptr; |
674 | STRLEN len = mg->mg_len; |
675 | assert ( mg->mg_ptr != 0 ); |
676 | if (mg->mg_len == HEf_SVKEY) |
677 | key = SvPV((SV *) mg->mg_ptr, len); |
678 | SHARED_CONTEXT; |
679 | svp = hv_fetch((HV*) SHAREDSvPTR(shared), key, len, 1); |
21312124 |
680 | } |
6b85e4fe |
681 | CALLER_CONTEXT; |
682 | target = Perl_sharedsv_associate(aTHX_ &sv, *svp, 0); |
683 | sharedsv_scalar_store(aTHX_ sv, target); |
684 | LEAVE_LOCK; |
21312124 |
685 | return 0; |
686 | } |
68795e93 |
687 | |
21312124 |
688 | int |
689 | sharedsv_elem_mg_DELETE(pTHX_ SV *sv, MAGIC *mg) |
68795e93 |
690 | { |
21312124 |
691 | dTHXc; |
057e91b3 |
692 | MAGIC *shmg; |
6b85e4fe |
693 | shared_sv *shared = SV_to_sharedsv(aTHX_ mg->mg_obj); |
6b85e4fe |
694 | ENTER_LOCK; |
695 | sharedsv_elem_mg_FETCH(aTHX_ sv, mg); |
057e91b3 |
696 | if ((shmg = mg_find(sv, PERL_MAGIC_shared_scalar))) |
697 | sharedsv_scalar_mg_get(aTHX_ sv, shmg); |
21312124 |
698 | if (SvTYPE(SHAREDSvPTR(shared)) == SVt_PVAV) { |
6b85e4fe |
699 | SHARED_CONTEXT; |
700 | av_delete((AV*) SHAREDSvPTR(shared), mg->mg_len, G_DISCARD); |
68795e93 |
701 | } |
21312124 |
702 | else { |
6b85e4fe |
703 | char *key = mg->mg_ptr; |
704 | STRLEN len = mg->mg_len; |
705 | assert ( mg->mg_ptr != 0 ); |
706 | if (mg->mg_len == HEf_SVKEY) |
707 | key = SvPV((SV *) mg->mg_ptr, len); |
708 | SHARED_CONTEXT; |
709 | hv_delete((HV*) SHAREDSvPTR(shared), key, len, G_DISCARD); |
21312124 |
710 | } |
6b85e4fe |
711 | CALLER_CONTEXT; |
712 | LEAVE_LOCK; |
21312124 |
713 | return 0; |
714 | } |
715 | |
21312124 |
716 | int |
717 | sharedsv_elem_mg_free(pTHX_ SV *sv, MAGIC *mg) |
718 | { |
6b85e4fe |
719 | Perl_sharedsv_free(aTHX_ SV_to_sharedsv(aTHX_ mg->mg_obj)); |
21312124 |
720 | return 0; |
721 | } |
722 | |
723 | int |
724 | sharedsv_elem_mg_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *param) |
725 | { |
6b85e4fe |
726 | shared_sv *shared = SV_to_sharedsv(aTHX_ mg->mg_obj); |
21312124 |
727 | SvREFCNT_inc(SHAREDSvPTR(shared)); |
728 | mg->mg_flags |= MGf_DUP; |
729 | return 0; |
730 | } |
731 | |
732 | MGVTBL sharedsv_elem_vtbl = { |
733 | sharedsv_elem_mg_FETCH, /* get */ |
734 | sharedsv_elem_mg_STORE, /* set */ |
735 | 0, /* len */ |
736 | sharedsv_elem_mg_DELETE, /* clear */ |
737 | sharedsv_elem_mg_free, /* free */ |
738 | 0, /* copy */ |
739 | sharedsv_elem_mg_dup /* dup */ |
740 | }; |
741 | |
742 | U32 |
743 | sharedsv_array_mg_FETCHSIZE(pTHX_ SV *sv, MAGIC *mg) |
744 | { |
745 | dTHXc; |
746 | shared_sv *shared = (shared_sv *) mg->mg_ptr; |
747 | U32 val; |
748 | SHARED_EDIT; |
749 | if (SvTYPE(SHAREDSvPTR(shared)) == SVt_PVAV) { |
750 | val = av_len((AV*) SHAREDSvPTR(shared)); |
751 | } |
752 | else { |
753 | /* not actually defined by tie API but ... */ |
754 | val = HvKEYS((HV*) SHAREDSvPTR(shared)); |
755 | } |
756 | SHARED_RELEASE; |
757 | return val; |
758 | } |
759 | |
760 | int |
761 | sharedsv_array_mg_CLEAR(pTHX_ SV *sv, MAGIC *mg) |
762 | { |
763 | dTHXc; |
764 | shared_sv *shared = (shared_sv *) mg->mg_ptr; |
765 | SHARED_EDIT; |
766 | if (SvTYPE(SHAREDSvPTR(shared)) == SVt_PVAV) { |
767 | av_clear((AV*) SHAREDSvPTR(shared)); |
768 | } |
769 | else { |
770 | hv_clear((HV*) SHAREDSvPTR(shared)); |
771 | } |
772 | SHARED_RELEASE; |
773 | return 0; |
774 | } |
775 | |
776 | int |
777 | sharedsv_array_mg_free(pTHX_ SV *sv, MAGIC *mg) |
778 | { |
779 | Perl_sharedsv_free(aTHX_ (shared_sv *) mg->mg_ptr); |
780 | return 0; |
68795e93 |
781 | } |
782 | |
783 | /* |
21312124 |
784 | * This is called when perl is about to access an element of |
785 | * the array - |
786 | */ |
787 | int |
788 | sharedsv_array_mg_copy(pTHX_ SV *sv, MAGIC* mg, |
789 | SV *nsv, const char *name, int namlen) |
790 | { |
791 | shared_sv *shared = (shared_sv *) mg->mg_ptr; |
792 | MAGIC *nmg = sv_magicext(nsv,mg->mg_obj, |
793 | toLOWER(mg->mg_type),&sharedsv_elem_vtbl, |
794 | name, namlen); |
b747d46a |
795 | ENTER_LOCK; |
a446a88f |
796 | SvREFCNT_inc(SHAREDSvPTR(shared)); |
b747d46a |
797 | LEAVE_LOCK; |
21312124 |
798 | nmg->mg_flags |= MGf_DUP; |
21312124 |
799 | return 1; |
800 | } |
801 | |
802 | int |
803 | sharedsv_array_mg_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *param) |
804 | { |
805 | shared_sv *shared = (shared_sv *) mg->mg_ptr; |
806 | SvREFCNT_inc(SHAREDSvPTR(shared)); |
807 | mg->mg_flags |= MGf_DUP; |
808 | return 0; |
809 | } |
810 | |
811 | MGVTBL sharedsv_array_vtbl = { |
812 | 0, /* get */ |
813 | 0, /* set */ |
814 | sharedsv_array_mg_FETCHSIZE, /* len */ |
815 | sharedsv_array_mg_CLEAR, /* clear */ |
816 | sharedsv_array_mg_free, /* free */ |
817 | sharedsv_array_mg_copy, /* copy */ |
818 | sharedsv_array_mg_dup /* dup */ |
819 | }; |
820 | |
821 | =for apidoc sharedsv_unlock |
68795e93 |
822 | |
823 | Recursively unlocks a shared sv. |
824 | |
21312124 |
825 | =cut |
68795e93 |
826 | |
827 | void |
828 | Perl_sharedsv_unlock(pTHX_ shared_sv* ssv) |
829 | { |
6d56dc1c |
830 | recursive_lock_release(aTHX_ &ssv->lock); |
68795e93 |
831 | } |
832 | |
21312124 |
833 | =for apidoc sharedsv_lock |
68795e93 |
834 | |
21312124 |
835 | Recursive locks on a sharedsv. |
836 | Locks are dynamically scoped at the level of the first lock. |
68795e93 |
837 | |
21312124 |
838 | =cut |
68795e93 |
839 | |
840 | void |
21312124 |
841 | Perl_sharedsv_lock(pTHX_ shared_sv* ssv) |
68795e93 |
842 | { |
21312124 |
843 | if (!ssv) |
844 | return; |
6b85e4fe |
845 | recursive_lock_acquire(aTHX_ &ssv->lock, __FILE__, __LINE__); |
68795e93 |
846 | } |
847 | |
afe38520 |
848 | /* handles calls from lock() builtin via PL_lockhook */ |
849 | |
21312124 |
850 | void |
851 | Perl_sharedsv_locksv(pTHX_ SV *sv) |
852 | { |
afe38520 |
853 | shared_sv* shared; |
854 | |
855 | if(SvROK(sv)) |
856 | sv = SvRV(sv); |
38875929 |
857 | shared = Perl_sharedsv_find(aTHX_ sv); |
afe38520 |
858 | if(!shared) |
859 | croak("lock can only be used on shared values"); |
860 | Perl_sharedsv_lock(aTHX_ shared); |
b050c948 |
861 | } |
862 | |
21312124 |
863 | =head1 Shared SV Functions |
b050c948 |
864 | |
21312124 |
865 | =for apidoc sharedsv_init |
b050c948 |
866 | |
21312124 |
867 | Saves a space for keeping SVs wider than an interpreter, |
b050c948 |
868 | |
21312124 |
869 | =cut |
870 | |
871 | void |
872 | Perl_sharedsv_init(pTHX) |
873 | { |
874 | dTHXc; |
875 | /* This pair leaves us in shared context ... */ |
876 | PL_sharedsv_space = perl_alloc(); |
877 | perl_construct(PL_sharedsv_space); |
878 | CALLER_CONTEXT; |
6d56dc1c |
879 | recursive_lock_init(aTHX_ &PL_sharedsv_lock); |
21312124 |
880 | PL_lockhook = &Perl_sharedsv_locksv; |
881 | PL_sharehook = &Perl_sharedsv_share; |
b050c948 |
882 | } |
883 | |
73e09c8f |
884 | #endif /* USE_ITHREADS */ |
885 | |
21312124 |
886 | MODULE = threads::shared PACKAGE = threads::shared::tie |
b050c948 |
887 | |
21312124 |
888 | PROTOTYPES: DISABLE |
b050c948 |
889 | |
73e09c8f |
890 | #ifdef USE_ITHREADS |
6b85e4fe |
891 | |
21312124 |
892 | void |
893 | PUSH(shared_sv *shared, ...) |
894 | CODE: |
895 | dTHXc; |
896 | int i; |
21312124 |
897 | for(i = 1; i < items; i++) { |
898 | SV* tmp = newSVsv(ST(i)); |
a446a88f |
899 | shared_sv *target; |
6d56dc1c |
900 | ENTER_LOCK; |
a446a88f |
901 | target = Perl_sharedsv_associate(aTHX_ &tmp, Nullsv, 0); |
6b85e4fe |
902 | sharedsv_scalar_store(aTHX_ tmp, target); |
21312124 |
903 | SHARED_CONTEXT; |
904 | av_push((AV*) SHAREDSvPTR(shared), SHAREDSvPTR(target)); |
b0cd0593 |
905 | SvREFCNT_inc(SHAREDSvPTR(target)); |
a446a88f |
906 | SHARED_RELEASE; |
21312124 |
907 | SvREFCNT_dec(tmp); |
908 | } |
b050c948 |
909 | |
21312124 |
910 | void |
911 | UNSHIFT(shared_sv *shared, ...) |
912 | CODE: |
913 | dTHXc; |
914 | int i; |
6d56dc1c |
915 | ENTER_LOCK; |
21312124 |
916 | SHARED_CONTEXT; |
917 | av_unshift((AV*)SHAREDSvPTR(shared), items - 1); |
918 | CALLER_CONTEXT; |
919 | for(i = 1; i < items; i++) { |
920 | SV* tmp = newSVsv(ST(i)); |
921 | shared_sv *target = Perl_sharedsv_associate(aTHX_ &tmp, Nullsv, 0); |
6b85e4fe |
922 | sharedsv_scalar_store(aTHX_ tmp, target); |
21312124 |
923 | SHARED_CONTEXT; |
924 | av_store((AV*) SHAREDSvPTR(shared), i - 1, SHAREDSvPTR(target)); |
b0cd0593 |
925 | SvREFCNT_inc(SHAREDSvPTR(target)); |
21312124 |
926 | CALLER_CONTEXT; |
927 | SvREFCNT_dec(tmp); |
928 | } |
6d56dc1c |
929 | LEAVE_LOCK; |
b050c948 |
930 | |
21312124 |
931 | void |
932 | POP(shared_sv *shared) |
933 | CODE: |
934 | dTHXc; |
935 | SV* sv; |
6d56dc1c |
936 | ENTER_LOCK; |
21312124 |
937 | SHARED_CONTEXT; |
938 | sv = av_pop((AV*)SHAREDSvPTR(shared)); |
939 | CALLER_CONTEXT; |
9b018978 |
940 | ST(0) = sv_newmortal(); |
21312124 |
941 | Perl_sharedsv_associate(aTHX_ &ST(0), sv, 0); |
9b018978 |
942 | SvREFCNT_dec(sv); |
6d56dc1c |
943 | LEAVE_LOCK; |
21312124 |
944 | XSRETURN(1); |
b050c948 |
945 | |
21312124 |
946 | void |
947 | SHIFT(shared_sv *shared) |
948 | CODE: |
949 | dTHXc; |
950 | SV* sv; |
6d56dc1c |
951 | ENTER_LOCK; |
21312124 |
952 | SHARED_CONTEXT; |
953 | sv = av_shift((AV*)SHAREDSvPTR(shared)); |
954 | CALLER_CONTEXT; |
9b018978 |
955 | ST(0) = sv_newmortal(); |
21312124 |
956 | Perl_sharedsv_associate(aTHX_ &ST(0), sv, 0); |
9b018978 |
957 | SvREFCNT_dec(sv); |
6d56dc1c |
958 | LEAVE_LOCK; |
21312124 |
959 | XSRETURN(1); |
b050c948 |
960 | |
21312124 |
961 | void |
962 | EXTEND(shared_sv *shared, IV count) |
963 | CODE: |
964 | dTHXc; |
965 | SHARED_EDIT; |
966 | av_extend((AV*)SHAREDSvPTR(shared), count); |
967 | SHARED_RELEASE; |
b050c948 |
968 | |
21312124 |
969 | void |
6b85e4fe |
970 | STORESIZE(shared_sv *shared,IV count) |
971 | CODE: |
972 | dTHXc; |
973 | SHARED_EDIT; |
974 | av_fill((AV*) SHAREDSvPTR(shared), count); |
975 | SHARED_RELEASE; |
976 | |
977 | |
978 | |
979 | |
980 | void |
21312124 |
981 | EXISTS(shared_sv *shared, SV *index) |
982 | CODE: |
983 | dTHXc; |
984 | bool exists; |
21312124 |
985 | if (SvTYPE(SHAREDSvPTR(shared)) == SVt_PVAV) { |
680c9d89 |
986 | SHARED_EDIT; |
21312124 |
987 | exists = av_exists((AV*) SHAREDSvPTR(shared), SvIV(index)); |
988 | } |
989 | else { |
6b85e4fe |
990 | STRLEN len; |
991 | char *key = SvPV(index,len); |
680c9d89 |
992 | SHARED_EDIT; |
6b85e4fe |
993 | exists = hv_exists((HV*) SHAREDSvPTR(shared), key, len); |
21312124 |
994 | } |
995 | SHARED_RELEASE; |
996 | ST(0) = (exists) ? &PL_sv_yes : &PL_sv_no; |
997 | XSRETURN(1); |
b050c948 |
998 | |
999 | |
1000 | void |
21312124 |
1001 | FIRSTKEY(shared_sv *shared) |
1002 | CODE: |
1003 | dTHXc; |
1004 | char* key = NULL; |
1005 | I32 len = 0; |
1006 | HE* entry; |
6d56dc1c |
1007 | ENTER_LOCK; |
21312124 |
1008 | SHARED_CONTEXT; |
1009 | hv_iterinit((HV*) SHAREDSvPTR(shared)); |
1010 | entry = hv_iternext((HV*) SHAREDSvPTR(shared)); |
1011 | if (entry) { |
1012 | key = hv_iterkey(entry,&len); |
1013 | CALLER_CONTEXT; |
1014 | ST(0) = sv_2mortal(newSVpv(key, len)); |
1015 | } else { |
1016 | CALLER_CONTEXT; |
1017 | ST(0) = &PL_sv_undef; |
1018 | } |
6d56dc1c |
1019 | LEAVE_LOCK; |
21312124 |
1020 | XSRETURN(1); |
b050c948 |
1021 | |
866fba46 |
1022 | void |
21312124 |
1023 | NEXTKEY(shared_sv *shared, SV *oldkey) |
1024 | CODE: |
1025 | dTHXc; |
1026 | char* key = NULL; |
1027 | I32 len = 0; |
1028 | HE* entry; |
6d56dc1c |
1029 | ENTER_LOCK; |
21312124 |
1030 | SHARED_CONTEXT; |
1031 | entry = hv_iternext((HV*) SHAREDSvPTR(shared)); |
6b85e4fe |
1032 | if (entry) { |
21312124 |
1033 | key = hv_iterkey(entry,&len); |
1034 | CALLER_CONTEXT; |
1035 | ST(0) = sv_2mortal(newSVpv(key, len)); |
1036 | } else { |
1037 | CALLER_CONTEXT; |
1038 | ST(0) = &PL_sv_undef; |
1039 | } |
6d56dc1c |
1040 | LEAVE_LOCK; |
21312124 |
1041 | XSRETURN(1); |
1042 | |
1043 | MODULE = threads::shared PACKAGE = threads::shared |
1044 | |
1045 | PROTOTYPES: ENABLE |
866fba46 |
1046 | |
68795e93 |
1047 | void |
9c4972d9 |
1048 | _id(SV *ref) |
1049 | PROTOTYPE: \[$@%] |
1050 | CODE: |
1051 | shared_sv *shared; |
afe38520 |
1052 | ref = SvRV(ref); |
9c4972d9 |
1053 | if(SvROK(ref)) |
1054 | ref = SvRV(ref); |
436c6dd3 |
1055 | if( (shared = Perl_sharedsv_find(aTHX_ ref)) ){ |
9c4972d9 |
1056 | ST(0) = sv_2mortal(newSViv(PTR2IV(shared))); |
1057 | XSRETURN(1); |
1058 | } |
1059 | XSRETURN_UNDEF; |
1060 | |
1061 | |
1062 | void |
6b85e4fe |
1063 | _refcnt(SV *ref) |
a446a88f |
1064 | PROTOTYPE: \[$@%] |
1065 | CODE: |
1066 | shared_sv *shared; |
afe38520 |
1067 | ref = SvRV(ref); |
a446a88f |
1068 | if(SvROK(ref)) |
1069 | ref = SvRV(ref); |
436c6dd3 |
1070 | if( (shared = Perl_sharedsv_find(aTHX_ ref)) ){ |
a446a88f |
1071 | if (SHAREDSvPTR(shared)) { |
1072 | ST(0) = sv_2mortal(newSViv(SvREFCNT(SHAREDSvPTR(shared)))); |
1073 | XSRETURN(1); |
1074 | } |
1075 | else { |
436c6dd3 |
1076 | Perl_warn(aTHX_ "%" SVf " s=%p has no shared SV",ST(0),shared); |
a446a88f |
1077 | } |
1078 | } |
1079 | else { |
436c6dd3 |
1080 | Perl_warn(aTHX_ "%" SVf " is not shared",ST(0)); |
a446a88f |
1081 | } |
1082 | XSRETURN_UNDEF; |
1083 | |
caf25f3b |
1084 | SV* |
a446a88f |
1085 | share(SV *ref) |
1086 | PROTOTYPE: \[$@%] |
1087 | CODE: |
56fcff86 |
1088 | if(!SvROK(ref)) |
1089 | Perl_croak(aTHX_ "Argument to share needs to be passed as ref"); |
afe38520 |
1090 | ref = SvRV(ref); |
a446a88f |
1091 | if(SvROK(ref)) |
1092 | ref = SvRV(ref); |
38875929 |
1093 | Perl_sharedsv_share(aTHX_ ref); |
caf25f3b |
1094 | RETVAL = newRV(ref); |
1095 | OUTPUT: |
1096 | RETVAL |
a446a88f |
1097 | |
1098 | void |
21312124 |
1099 | lock_enabled(SV *ref) |
ce127893 |
1100 | PROTOTYPE: \[$@%] |
6f942b98 |
1101 | CODE: |
1102 | shared_sv* shared; |
56fcff86 |
1103 | if(!SvROK(ref)) |
1104 | Perl_croak(aTHX_ "Argument to lock needs to be passed as ref"); |
afe38520 |
1105 | ref = SvRV(ref); |
6f942b98 |
1106 | if(SvROK(ref)) |
1107 | ref = SvRV(ref); |
38875929 |
1108 | shared = Perl_sharedsv_find(aTHX_ ref); |
21312124 |
1109 | if(!shared) |
1110 | croak("lock can only be used on shared values"); |
1111 | Perl_sharedsv_lock(aTHX_ shared); |
6f942b98 |
1112 | |
1113 | void |
a0e036c1 |
1114 | cond_wait_enabled(SV *ref_cond, SV *ref_lock = 0) |
1115 | PROTOTYPE: \[$@%];\[$@%] |
1116 | PREINIT: |
6f942b98 |
1117 | shared_sv* shared; |
a0e036c1 |
1118 | perl_cond* user_condition; |
6f942b98 |
1119 | int locks; |
a0e036c1 |
1120 | int same = 0; |
1121 | |
1122 | CODE: |
1123 | if (!ref_lock || ref_lock == ref_cond) same = 1; |
1124 | |
1125 | if(!SvROK(ref_cond)) |
56fcff86 |
1126 | Perl_croak(aTHX_ "Argument to cond_wait needs to be passed as ref"); |
a0e036c1 |
1127 | ref_cond = SvRV(ref_cond); |
1128 | if(SvROK(ref_cond)) |
1129 | ref_cond = SvRV(ref_cond); |
1130 | shared = Perl_sharedsv_find(aTHX_ ref_cond); |
6f942b98 |
1131 | if(!shared) |
1132 | croak("cond_wait can only be used on shared values"); |
a0e036c1 |
1133 | |
1134 | user_condition = &shared->user_cond; |
1135 | if (! same) { |
1136 | if (!SvROK(ref_lock)) |
1137 | Perl_croak(aTHX_ "cond_wait lock needs to be passed as ref"); |
1138 | ref_lock = SvRV(ref_lock); |
1139 | if (SvROK(ref_lock)) ref_lock = SvRV(ref_lock); |
1140 | shared = Perl_sharedsv_find(aTHX_ ref_lock); |
1141 | if (!shared) |
1142 | croak("cond_wait lock must be a shared value"); |
1143 | } |
6d56dc1c |
1144 | if(shared->lock.owner != aTHX) |
6f942b98 |
1145 | croak("You need a lock before you can cond_wait"); |
6d56dc1c |
1146 | /* Stealing the members of the lock object worries me - NI-S */ |
1147 | MUTEX_LOCK(&shared->lock.mutex); |
1148 | shared->lock.owner = NULL; |
39f33d92 |
1149 | locks = shared->lock.locks; |
1150 | shared->lock.locks = 0; |
89661126 |
1151 | |
1152 | /* since we are releasing the lock here we need to tell other |
1153 | people that is ok to go ahead and use it */ |
1154 | COND_SIGNAL(&shared->lock.cond); |
a0e036c1 |
1155 | COND_WAIT(user_condition, &shared->lock.mutex); |
89661126 |
1156 | while(shared->lock.owner != NULL) { |
a0e036c1 |
1157 | /* OK -- must reacquire the lock */ |
1158 | COND_WAIT(&shared->lock.cond, &shared->lock.mutex); |
1159 | } |
1160 | shared->lock.owner = aTHX; |
1161 | shared->lock.locks = locks; |
1162 | MUTEX_UNLOCK(&shared->lock.mutex); |
1163 | |
1164 | int |
1165 | cond_timedwait_enabled(SV *ref_cond, double abs, SV *ref_lock = 0) |
1166 | PROTOTYPE: \[$@%]$;\[$@%] |
1167 | PREINIT: |
1168 | shared_sv* shared; |
1169 | perl_cond* user_condition; |
1170 | int locks; |
1171 | int same = 0; |
1172 | |
1173 | CODE: |
1174 | if (!ref_lock || ref_cond == ref_lock) same = 1; |
1175 | |
1176 | if(!SvROK(ref_cond)) |
1177 | Perl_croak(aTHX_ "Argument to cond_timedwait needs to be passed as ref"); |
1178 | ref_cond = SvRV(ref_cond); |
1179 | if(SvROK(ref_cond)) |
1180 | ref_cond = SvRV(ref_cond); |
1181 | shared = Perl_sharedsv_find(aTHX_ ref_cond); |
1182 | if(!shared) |
1183 | croak("cond_timedwait can only be used on shared values"); |
1184 | |
1185 | user_condition = &shared->user_cond; |
1186 | if (! same) { |
1187 | if (!SvROK(ref_lock)) |
1188 | Perl_croak(aTHX_ "cond_timedwait lock needs to be passed as ref"); |
1189 | ref_lock = SvRV(ref_lock); |
1190 | if (SvROK(ref_lock)) ref_lock = SvRV(ref_lock); |
1191 | shared = Perl_sharedsv_find(aTHX_ ref_lock); |
1192 | if (!shared) |
1193 | croak("cond_timedwait lock must be a shared value"); |
1194 | } |
1195 | if(shared->lock.owner != aTHX) |
1196 | croak("You need a lock before you can cond_wait"); |
1197 | |
1198 | MUTEX_LOCK(&shared->lock.mutex); |
1199 | shared->lock.owner = NULL; |
1200 | locks = shared->lock.locks; |
1201 | shared->lock.locks = 0; |
1202 | /* since we are releasing the lock here we need to tell other |
1203 | people that is ok to go ahead and use it */ |
1204 | COND_SIGNAL(&shared->lock.cond); |
1205 | RETVAL = Perl_sharedsv_cond_timedwait(user_condition, &shared->lock.mutex, abs); |
1206 | while (shared->lock.owner != NULL) { |
1207 | /* OK -- must reacquire the lock... */ |
1208 | COND_WAIT(&shared->lock.cond, &shared->lock.mutex); |
1209 | } |
6d56dc1c |
1210 | shared->lock.owner = aTHX; |
1211 | shared->lock.locks = locks; |
1212 | MUTEX_UNLOCK(&shared->lock.mutex); |
6f942b98 |
1213 | |
a0e036c1 |
1214 | if (RETVAL == 0) |
1215 | XSRETURN_UNDEF; |
1216 | OUTPUT: |
1217 | RETVAL |
1218 | |
21312124 |
1219 | void |
1220 | cond_signal_enabled(SV *ref) |
ce127893 |
1221 | PROTOTYPE: \[$@%] |
6f942b98 |
1222 | CODE: |
1223 | shared_sv* shared; |
56fcff86 |
1224 | if(!SvROK(ref)) |
1225 | Perl_croak(aTHX_ "Argument to cond_signal needs to be passed as ref"); |
afe38520 |
1226 | ref = SvRV(ref); |
6f942b98 |
1227 | if(SvROK(ref)) |
1228 | ref = SvRV(ref); |
1229 | shared = Perl_sharedsv_find(aTHX_ ref); |
38875929 |
1230 | if (ckWARN(WARN_THREADS) && shared->lock.owner != aTHX) |
1231 | Perl_warner(aTHX_ packWARN(WARN_THREADS), |
1232 | "cond_signal() called on unlocked variable"); |
6f942b98 |
1233 | if(!shared) |
1234 | croak("cond_signal can only be used on shared values"); |
1235 | COND_SIGNAL(&shared->user_cond); |
1236 | |
21312124 |
1237 | void |
1238 | cond_broadcast_enabled(SV *ref) |
ce127893 |
1239 | PROTOTYPE: \[$@%] |
6f942b98 |
1240 | CODE: |
1241 | shared_sv* shared; |
56fcff86 |
1242 | if(!SvROK(ref)) |
1243 | Perl_croak(aTHX_ "Argument to cond_broadcast needs to be passed as ref"); |
afe38520 |
1244 | ref = SvRV(ref); |
6f942b98 |
1245 | if(SvROK(ref)) |
1246 | ref = SvRV(ref); |
1247 | shared = Perl_sharedsv_find(aTHX_ ref); |
1248 | if(!shared) |
1249 | croak("cond_broadcast can only be used on shared values"); |
38875929 |
1250 | if (ckWARN(WARN_THREADS) && shared->lock.owner != aTHX) |
1251 | Perl_warner(aTHX_ packWARN(WARN_THREADS), |
1252 | "cond_broadcast() called on unlocked variable"); |
6f942b98 |
1253 | COND_BROADCAST(&shared->user_cond); |
b050c948 |
1254 | |
5c360ac5 |
1255 | |
1256 | SV* |
1257 | bless(SV* ref, ...); |
1258 | PROTOTYPE: $;$ |
1259 | CODE: |
1260 | { |
1261 | HV* stash; |
1262 | shared_sv* shared; |
1263 | if (items == 1) |
1264 | stash = CopSTASH(PL_curcop); |
1265 | else { |
1266 | SV* ssv = ST(1); |
1267 | STRLEN len; |
1268 | char *ptr; |
1269 | |
1270 | if (ssv && !SvGMAGICAL(ssv) && !SvAMAGIC(ssv) && SvROK(ssv)) |
1271 | Perl_croak(aTHX_ "Attempt to bless into a reference"); |
1272 | ptr = SvPV(ssv,len); |
1273 | if (ckWARN(WARN_MISC) && len == 0) |
1274 | Perl_warner(aTHX_ packWARN(WARN_MISC), |
1275 | "Explicit blessing to '' (assuming package main)"); |
1276 | stash = gv_stashpvn(ptr, len, TRUE); |
1277 | } |
1278 | SvREFCNT_inc(ref); |
1279 | (void)sv_bless(ref, stash); |
1280 | RETVAL = ref; |
1281 | shared = Perl_sharedsv_find(aTHX_ ref); |
1282 | if(shared) { |
1283 | dTHXc; |
1284 | ENTER_LOCK; |
1285 | SHARED_CONTEXT; |
1286 | { |
1287 | SV* fake_stash = newSVpv(HvNAME(stash),0); |
1288 | (void)sv_bless(SHAREDSvPTR(shared),(HV*)fake_stash); |
1289 | } |
1290 | CALLER_CONTEXT; |
1291 | LEAVE_LOCK; |
1292 | } |
1293 | } |
1294 | OUTPUT: |
1295 | RETVAL |
1296 | |
73e09c8f |
1297 | #endif /* USE_ITHREADS */ |
1298 | |
68795e93 |
1299 | BOOT: |
1300 | { |
73e09c8f |
1301 | #ifdef USE_ITHREADS |
68795e93 |
1302 | Perl_sharedsv_init(aTHX); |
73e09c8f |
1303 | #endif /* USE_ITHREADS */ |
68795e93 |
1304 | } |
73e09c8f |
1305 | |
1306 | |
1307 | |