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