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