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afe38520 | 1 | /* shared.xs |
68795e93 | 2 | * |
60c5c75c | 3 | * Copyright (c) 2001-2002, 2006 Larry Wall |
68795e93 NIS |
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 NIS |
8 | * "Hand any two wizards a piece of rope and they would instinctively pull in |
9 | * opposite directions." | |
10 | * --Sourcery | |
11 | * | |
7473853a SP |
12 | * Contributed by Artur Bergman <sky AT crucially DOT net> |
13 | * Pulled in the (an)other direction by Nick Ing-Simmons | |
14 | * <nick AT ing-simmons DOT net> | |
15 | * CPAN version produced by Jerry D. Hedden <jdhedden AT cpan DOT org> | |
21312124 | 16 | */ |
68795e93 | 17 | |
29ecdb6f DM |
18 | /* |
19 | * Shared variables are implemented by a scheme similar to tieing. | |
20 | * Each thread has a proxy SV with attached magic -- "private SVs" -- | |
21 | * which all point to a single SV in a separate shared interpreter | |
22 | * (PL_sharedsv_space) -- "shared SVs". | |
23 | * | |
24 | * The shared SV holds the variable's true values, and its state is | |
25 | * copied between the shared and private SVs with the usual | |
26 | * mg_get()/mg_set() arrangement. | |
27 | * | |
28 | * Aggregates (AVs and HVs) are implemented using tie magic, except that | |
29 | * the vtable used is one defined in this file rather than the standard one. | |
7473853a | 30 | * This means that where a tie function like FETCH is normally invoked by |
29ecdb6f DM |
31 | * the tie magic's mg_get() function, we completely bypass the calling of a |
32 | * perl-level function, and directly call C-level code to handle it. On | |
7473853a SP |
33 | * the other hand, calls to functions like PUSH are done directly by code |
34 | * in av.c, etc., which we can't bypass. So the best we can do is to provide | |
29ecdb6f DM |
35 | * XS versions of these functions. We also have to attach a tie object, |
36 | * blessed into the class threads::shared::tie, to keep the method-calling | |
37 | * code happy. | |
38 | * | |
39 | * Access to aggregate elements is done the usual tied way by returning a | |
40 | * proxy PVLV element with attached element magic. | |
41 | * | |
42 | * Pointers to the shared SV are squirrelled away in the mg->mg_ptr field | |
43 | * of magic (with mg_len == 0), and in the IV2PTR(SvIV(sv)) field of tied | |
44 | * object SVs. These pointers have to be hidden like this because they | |
45 | * cross interpreter boundaries, and we don't want sv_clear() and friends | |
46 | * following them. | |
47 | * | |
48 | * The three basic shared types look like the following: | |
49 | * | |
50 | * ----------------- | |
51 | * | |
52 | * Shared scalar (my $s : shared): | |
53 | * | |
54 | * SV = PVMG(0x7ba238) at 0x7387a8 | |
55 | * FLAGS = (PADMY,GMG,SMG) | |
56 | * MAGIC = 0x824d88 | |
57 | * MG_TYPE = PERL_MAGIC_shared_scalar(n) | |
7473853a | 58 | * MG_PTR = 0x810358 <<<< pointer to the shared SV |
29ecdb6f DM |
59 | * |
60 | * ----------------- | |
61 | * | |
62 | * Shared aggregate (my @a : shared; my %h : shared): | |
63 | * | |
64 | * SV = PVAV(0x7175d0) at 0x738708 | |
65 | * FLAGS = (PADMY,RMG) | |
66 | * MAGIC = 0x824e48 | |
67 | * MG_TYPE = PERL_MAGIC_tied(P) | |
7473853a | 68 | * MG_OBJ = 0x7136e0 <<<< ref to the tied object |
29ecdb6f DM |
69 | * SV = RV(0x7136f0) at 0x7136e0 |
70 | * RV = 0x738640 | |
71 | * SV = PVMG(0x7ba238) at 0x738640 <<<< the tied object | |
72 | * FLAGS = (OBJECT,IOK,pIOK) | |
7473853a | 73 | * IV = 8455000 <<<< pointer to the shared AV |
29ecdb6f | 74 | * STASH = 0x80abf0 "threads::shared::tie" |
7473853a | 75 | * MG_PTR = 0x810358 "" <<<< another pointer to the shared AV |
29ecdb6f DM |
76 | * ARRAY = 0x0 |
77 | * | |
78 | * ----------------- | |
79 | * | |
80 | * Aggregate element (my @a : shared; $a[0]) | |
81 | * | |
82 | * SV = PVLV(0x77f628) at 0x713550 | |
83 | * FLAGS = (GMG,SMG,RMG,pIOK) | |
84 | * MAGIC = 0x72bd58 | |
85 | * MG_TYPE = PERL_MAGIC_shared_scalar(n) | |
7473853a | 86 | * MG_PTR = 0x8103c0 "" <<<< pointer to the shared element |
29ecdb6f DM |
87 | * MAGIC = 0x72bd18 |
88 | * MG_TYPE = PERL_MAGIC_tiedelem(p) | |
7473853a | 89 | * MG_OBJ = 0x7136e0 <<<< ref to the tied object |
29ecdb6f DM |
90 | * SV = RV(0x7136f0) at 0x7136e0 |
91 | * RV = 0x738660 | |
92 | * SV = PVMG(0x7ba278) at 0x738660 <<<< the tied object | |
93 | * FLAGS = (OBJECT,IOK,pIOK) | |
7473853a | 94 | * IV = 8455064 <<<< pointer to the shared AV |
29ecdb6f DM |
95 | * STASH = 0x80ac30 "threads::shared::tie" |
96 | * TYPE = t | |
97 | * | |
98 | * Note that PERL_MAGIC_tiedelem(p) magic doesn't have a pointer to a | |
99 | * shared SV in mg_ptr; instead this is used to store the hash key, | |
100 | * if any, like normal tied elements. Note also that element SVs may have | |
7473853a | 101 | * pointers to both the shared aggregate and the shared element. |
29ecdb6f DM |
102 | * |
103 | * | |
104 | * Userland locks: | |
105 | * | |
7473853a | 106 | * If a shared variable is used as a perl-level lock or condition |
29ecdb6f | 107 | * variable, then PERL_MAGIC_ext magic is attached to the associated |
7473853a | 108 | * *shared* SV, whose mg_ptr field points to a malloc'ed structure |
29ecdb6f DM |
109 | * containing the necessary mutexes and condition variables. |
110 | * | |
111 | * Nomenclature: | |
112 | * | |
7473853a SP |
113 | * In this file, any variable name prefixed with 's' (e.g., ssv, stmp or sobj) |
114 | * usually represents a shared SV which corresponds to a private SV named | |
115 | * without the prefix (e.g., sv, tmp or obj). | |
116 | */ | |
117 | ||
68795e93 | 118 | #define PERL_NO_GET_CONTEXT |
b050c948 AB |
119 | #include "EXTERN.h" |
120 | #include "perl.h" | |
121 | #include "XSUB.h" | |
7473853a | 122 | #ifdef HAS_PPPORT_H |
39ec4146 | 123 | # define NEED_sv_2pv_flags |
05b59262 RGS |
124 | # define NEED_vnewSVpvf |
125 | # define NEED_warner | |
7473853a SP |
126 | # include "ppport.h" |
127 | # include "shared.h" | |
128 | #endif | |
b050c948 | 129 | |
73e09c8f JH |
130 | #ifdef USE_ITHREADS |
131 | ||
e21694ed JH |
132 | /* Magic signature(s) for mg_private to make PERL_MAGIC_ext magic safer */ |
133 | #define UL_MAGIC_SIG 0x554C /* UL = user lock */ | |
134 | ||
21312124 NIS |
135 | /* |
136 | * The shared things need an intepreter to live in ... | |
137 | */ | |
138 | PerlInterpreter *PL_sharedsv_space; /* The shared sv space */ | |
139 | /* To access shared space we fake aTHX in this scope and thread's context */ | |
057e91b3 | 140 | |
7473853a SP |
141 | /* Bug #24255: We include ENTER+SAVETMPS/FREETMPS+LEAVE with |
142 | * SHARED_CONTEXT/CALLER_CONTEXT macros, so that any mortals, etc. created | |
1011f542 | 143 | * while in the shared interpreter context don't languish */ |
057e91b3 | 144 | |
7473853a SP |
145 | #define SHARED_CONTEXT \ |
146 | STMT_START { \ | |
147 | PERL_SET_CONTEXT((aTHX = PL_sharedsv_space)); \ | |
148 | ENTER; \ | |
149 | SAVETMPS; \ | |
057e91b3 | 150 | } STMT_END |
21312124 NIS |
151 | |
152 | /* So we need a way to switch back to the caller's context... */ | |
153 | /* So we declare _another_ copy of the aTHX variable ... */ | |
154 | #define dTHXc PerlInterpreter *caller_perl = aTHX | |
057e91b3 | 155 | |
7473853a SP |
156 | /* ... and use it to switch back */ |
157 | #define CALLER_CONTEXT \ | |
158 | STMT_START { \ | |
159 | FREETMPS; \ | |
160 | LEAVE; \ | |
161 | PERL_SET_CONTEXT((aTHX = caller_perl)); \ | |
057e91b3 | 162 | } STMT_END |
21312124 NIS |
163 | |
164 | /* | |
165 | * Only one thread at a time is allowed to mess with shared space. | |
166 | */ | |
a446a88f | 167 | |
7473853a SP |
168 | typedef struct { |
169 | perl_mutex mutex; | |
170 | PerlInterpreter *owner; | |
171 | I32 locks; | |
172 | perl_cond cond; | |
6b85e4fe | 173 | #ifdef DEBUG_LOCKS |
7473853a SP |
174 | char * file; |
175 | int line; | |
6b85e4fe | 176 | #endif |
6d56dc1c NIS |
177 | } recursive_lock_t; |
178 | ||
7473853a | 179 | recursive_lock_t PL_sharedsv_lock; /* Mutex protecting the shared sv space */ |
6d56dc1c NIS |
180 | |
181 | void | |
182 | recursive_lock_init(pTHX_ recursive_lock_t *lock) | |
183 | { | |
184 | Zero(lock,1,recursive_lock_t); | |
185 | MUTEX_INIT(&lock->mutex); | |
186 | COND_INIT(&lock->cond); | |
187 | } | |
188 | ||
a39edb3a | 189 | void |
579f9913 AB |
190 | recursive_lock_destroy(pTHX_ recursive_lock_t *lock) |
191 | { | |
192 | MUTEX_DESTROY(&lock->mutex); | |
193 | COND_DESTROY(&lock->cond); | |
194 | } | |
195 | ||
6d56dc1c NIS |
196 | void |
197 | recursive_lock_release(pTHX_ recursive_lock_t *lock) | |
198 | { | |
199 | MUTEX_LOCK(&lock->mutex); | |
ba2940ce JH |
200 | if (lock->owner == aTHX) { |
201 | if (--lock->locks == 0) { | |
202 | lock->owner = NULL; | |
203 | COND_SIGNAL(&lock->cond); | |
204 | } | |
6d56dc1c NIS |
205 | } |
206 | MUTEX_UNLOCK(&lock->mutex); | |
207 | } | |
a446a88f | 208 | |
6d56dc1c | 209 | void |
7473853a | 210 | recursive_lock_acquire(pTHX_ recursive_lock_t *lock, char *file, int line) |
6d56dc1c NIS |
211 | { |
212 | assert(aTHX); | |
213 | MUTEX_LOCK(&lock->mutex); | |
214 | if (lock->owner == aTHX) { | |
7473853a SP |
215 | lock->locks++; |
216 | } else { | |
217 | while (lock->owner) { | |
6b85e4fe | 218 | #ifdef DEBUG_LOCKS |
7473853a SP |
219 | Perl_warn(aTHX_ " %p waiting - owned by %p %s:%d\n", |
220 | aTHX, lock->owner, lock->file, lock->line); | |
6b85e4fe | 221 | #endif |
7473853a | 222 | COND_WAIT(&lock->cond,&lock->mutex); |
6b85e4fe | 223 | } |
7473853a SP |
224 | lock->locks = 1; |
225 | lock->owner = aTHX; | |
6b85e4fe | 226 | #ifdef DEBUG_LOCKS |
7473853a SP |
227 | lock->file = file; |
228 | lock->line = line; | |
6b85e4fe | 229 | #endif |
6d56dc1c NIS |
230 | } |
231 | MUTEX_UNLOCK(&lock->mutex); | |
6b85e4fe | 232 | SAVEDESTRUCTOR_X(recursive_lock_release,lock); |
6d56dc1c NIS |
233 | } |
234 | ||
7473853a SP |
235 | #define ENTER_LOCK \ |
236 | STMT_START { \ | |
237 | ENTER; \ | |
238 | recursive_lock_acquire(aTHX_ &PL_sharedsv_lock, __FILE__, __LINE__);\ | |
239 | } STMT_END | |
21312124 | 240 | |
7473853a SP |
241 | /* The unlocking is done automatically at scope exit */ |
242 | #define LEAVE_LOCK LEAVE | |
6d56dc1c | 243 | |
21312124 NIS |
244 | |
245 | /* A common idiom is to acquire access and switch in ... */ | |
7473853a SP |
246 | #define SHARED_EDIT \ |
247 | STMT_START { \ | |
248 | ENTER_LOCK; \ | |
249 | SHARED_CONTEXT; \ | |
250 | } STMT_END | |
21312124 | 251 | |
7473853a SP |
252 | /* ... then switch out and release access. */ |
253 | #define SHARED_RELEASE \ | |
254 | STMT_START { \ | |
255 | CALLER_CONTEXT; \ | |
256 | LEAVE_LOCK; \ | |
257 | } STMT_END | |
85e0a142 | 258 | |
21312124 | 259 | |
7473853a | 260 | /* User-level locks: |
29ecdb6f DM |
261 | This structure is attached (using ext magic) to any shared SV that |
262 | is used by user-level locking or condition code | |
21312124 | 263 | */ |
68795e93 NIS |
264 | |
265 | typedef struct { | |
7473853a | 266 | recursive_lock_t lock; /* For user-levl locks */ |
68795e93 | 267 | perl_cond user_cond; /* For user-level conditions */ |
29ecdb6f | 268 | } user_lock; |
68795e93 | 269 | |
7473853a | 270 | /* Magic used for attaching user_lock structs to shared SVs |
68795e93 | 271 | |
21312124 NIS |
272 | The vtable used has just one entry - when the SV goes away |
273 | we free the memory for the above. | |
21312124 | 274 | */ |
68795e93 | 275 | |
21312124 | 276 | int |
29ecdb6f | 277 | sharedsv_userlock_free(pTHX_ SV *sv, MAGIC *mg) |
21312124 | 278 | { |
29ecdb6f DM |
279 | user_lock *ul = (user_lock *) mg->mg_ptr; |
280 | assert(aTHX == PL_sharedsv_space); | |
281 | if (ul) { | |
7473853a SP |
282 | recursive_lock_destroy(aTHX_ &ul->lock); |
283 | COND_DESTROY(&ul->user_cond); | |
284 | PerlMemShared_free(ul); | |
285 | mg->mg_ptr = NULL; | |
21312124 | 286 | } |
7473853a | 287 | return (0); |
21312124 NIS |
288 | } |
289 | ||
7473853a SP |
290 | MGVTBL sharedsv_userlock_vtbl = { |
291 | 0, /* get */ | |
292 | 0, /* set */ | |
293 | 0, /* len */ | |
294 | 0, /* clear */ | |
295 | sharedsv_userlock_free, /* free */ | |
296 | 0, /* copy */ | |
297 | 0, /* dup */ | |
298 | #ifdef MGf_LOCAL | |
299 | 0, /* local */ | |
300 | #endif | |
21312124 NIS |
301 | }; |
302 | ||
7473853a SP |
303 | /* |
304 | * Access to shared things is heavily based on MAGIC | |
305 | * - in mg.h/mg.c/sv.c sense | |
306 | */ | |
21312124 NIS |
307 | |
308 | /* In any thread that has access to a shared thing there is a "proxy" | |
309 | for it in its own space which has 'MAGIC' associated which accesses | |
310 | the shared thing. | |
311 | */ | |
312 | ||
3bc7ad01 JH |
313 | extern MGVTBL sharedsv_scalar_vtbl; /* Scalars have this vtable */ |
314 | extern MGVTBL sharedsv_array_vtbl; /* Hashes and arrays have this | |
315 | - like 'tie' */ | |
316 | extern MGVTBL sharedsv_elem_vtbl; /* Elements of hashes and arrays have | |
317 | this _AS WELL AS_ the scalar magic: | |
29ecdb6f | 318 | The sharedsv_elem_vtbl associates the element with the array/hash and |
21312124 NIS |
319 | the sharedsv_scalar_vtbl associates it with the value |
320 | */ | |
321 | ||
6b85e4fe | 322 | |
7473853a | 323 | /* Get shared aggregate SV pointed to by threads::shared::tie magic object */ |
29ecdb6f DM |
324 | |
325 | STATIC SV * | |
326 | S_sharedsv_from_obj(pTHX_ SV *sv) | |
6b85e4fe | 327 | { |
7473853a | 328 | return ((SvROK(sv)) ? INT2PTR(SV *, SvIV(SvRV(sv))) : NULL); |
29ecdb6f DM |
329 | } |
330 | ||
331 | ||
332 | /* Return the user_lock structure (if any) associated with a shared SV. | |
7473853a SP |
333 | * If create is true, create one if it doesn't exist |
334 | */ | |
29ecdb6f DM |
335 | STATIC user_lock * |
336 | S_get_userlock(pTHX_ SV* ssv, bool create) | |
337 | { | |
338 | MAGIC *mg; | |
339 | user_lock *ul = NULL; | |
340 | ||
341 | assert(ssv); | |
7473853a | 342 | /* XXX Redesign the storage of user locks so we don't need a global |
29ecdb6f DM |
343 | * lock to access them ???? DAPM */ |
344 | ENTER_LOCK; | |
e21694ed JH |
345 | |
346 | /* Version of mg_find that also checks the private signature */ | |
347 | for (mg = SvMAGIC(ssv); mg; mg = mg->mg_moremagic) { | |
348 | if ((mg->mg_type == PERL_MAGIC_ext) && | |
349 | (mg->mg_private == UL_MAGIC_SIG)) | |
350 | { | |
351 | break; | |
352 | } | |
353 | } | |
354 | ||
7473853a SP |
355 | if (mg) { |
356 | ul = (user_lock*)(mg->mg_ptr); | |
357 | } else if (create) { | |
358 | dTHXc; | |
359 | SHARED_CONTEXT; | |
360 | ul = (user_lock *) PerlMemShared_malloc(sizeof(user_lock)); | |
361 | Zero(ul, 1, user_lock); | |
362 | /* Attach to shared SV using ext magic */ | |
e21694ed JH |
363 | mg = sv_magicext(ssv, NULL, PERL_MAGIC_ext, &sharedsv_userlock_vtbl, |
364 | (char *)ul, 0); | |
365 | mg->mg_private = UL_MAGIC_SIG; /* Set private signature */ | |
7473853a SP |
366 | recursive_lock_init(aTHX_ &ul->lock); |
367 | COND_INIT(&ul->user_cond); | |
368 | CALLER_CONTEXT; | |
29ecdb6f DM |
369 | } |
370 | LEAVE_LOCK; | |
7473853a | 371 | return (ul); |
6b85e4fe NIS |
372 | } |
373 | ||
29ecdb6f | 374 | |
ba2940ce JH |
375 | /* Given a private side SV tries to find if the SV has a shared backend, |
376 | * by looking for the magic. | |
377 | */ | |
29ecdb6f | 378 | SV * |
21312124 NIS |
379 | Perl_sharedsv_find(pTHX_ SV *sv) |
380 | { | |
381 | MAGIC *mg; | |
a446a88f | 382 | if (SvTYPE(sv) >= SVt_PVMG) { |
7473853a SP |
383 | switch(SvTYPE(sv)) { |
384 | case SVt_PVAV: | |
385 | case SVt_PVHV: | |
386 | if ((mg = mg_find(sv, PERL_MAGIC_tied)) | |
387 | && mg->mg_virtual == &sharedsv_array_vtbl) { | |
388 | return ((SV *)mg->mg_ptr); | |
389 | } | |
390 | break; | |
391 | default: | |
392 | /* This should work for elements as well as they | |
393 | * have scalar magic as well as their element magic | |
394 | */ | |
395 | if ((mg = mg_find(sv, PERL_MAGIC_shared_scalar)) | |
396 | && mg->mg_virtual == &sharedsv_scalar_vtbl) { | |
397 | return ((SV *)mg->mg_ptr); | |
398 | } | |
399 | break; | |
400 | } | |
21312124 | 401 | } |
6b85e4fe NIS |
402 | /* Just for tidyness of API also handle tie objects */ |
403 | if (SvROK(sv) && sv_derived_from(sv, "threads::shared::tie")) { | |
7473853a | 404 | return (S_sharedsv_from_obj(aTHX_ sv)); |
6b85e4fe | 405 | } |
7473853a | 406 | return (NULL); |
21312124 | 407 | } |
68795e93 | 408 | |
68795e93 | 409 | |
7473853a SP |
410 | /* Associate a private SV with a shared SV by pointing the appropriate |
411 | * magics at it. | |
412 | * Assumes lock is held. | |
413 | */ | |
29ecdb6f DM |
414 | void |
415 | Perl_sharedsv_associate(pTHX_ SV *sv, SV *ssv) | |
21312124 | 416 | { |
a446a88f | 417 | MAGIC *mg = 0; |
a446a88f | 418 | |
29ecdb6f | 419 | /* If we are asked for any private ops we need a thread */ |
a446a88f NIS |
420 | assert ( aTHX != PL_sharedsv_space ); |
421 | ||
422 | /* To avoid need for recursive locks require caller to hold lock */ | |
6d56dc1c | 423 | assert ( PL_sharedsv_lock.owner == aTHX ); |
6b85e4fe | 424 | |
29ecdb6f DM |
425 | switch(SvTYPE(sv)) { |
426 | case SVt_PVAV: | |
427 | case SVt_PVHV: | |
7473853a SP |
428 | if (!(mg = mg_find(sv, PERL_MAGIC_tied)) |
429 | || mg->mg_virtual != &sharedsv_array_vtbl | |
430 | || (SV*) mg->mg_ptr != ssv) | |
431 | { | |
432 | SV *obj = newSV(0); | |
433 | sv_setref_iv(obj, "threads::shared::tie", PTR2IV(ssv)); | |
434 | if (mg) { | |
435 | sv_unmagic(sv, PERL_MAGIC_tied); | |
436 | } | |
437 | mg = sv_magicext(sv, obj, PERL_MAGIC_tied, &sharedsv_array_vtbl, | |
438 | (char *)ssv, 0); | |
439 | mg->mg_flags |= (MGf_COPY|MGf_DUP); | |
440 | SvREFCNT_inc_void(ssv); | |
441 | SvREFCNT_dec(obj); | |
442 | } | |
443 | break; | |
68795e93 | 444 | |
29ecdb6f | 445 | default: |
7473853a SP |
446 | if ((SvTYPE(sv) < SVt_PVMG) |
447 | || !(mg = mg_find(sv, PERL_MAGIC_shared_scalar)) | |
448 | || mg->mg_virtual != &sharedsv_scalar_vtbl | |
449 | || (SV*) mg->mg_ptr != ssv) | |
450 | { | |
451 | if (mg) { | |
452 | sv_unmagic(sv, PERL_MAGIC_shared_scalar); | |
453 | } | |
454 | mg = sv_magicext(sv, Nullsv, PERL_MAGIC_shared_scalar, | |
455 | &sharedsv_scalar_vtbl, (char *)ssv, 0); | |
456 | mg->mg_flags |= (MGf_DUP | |
457 | #ifdef MGf_LOCAL | |
458 | |MGf_LOCAL | |
459 | #endif | |
460 | ); | |
461 | SvREFCNT_inc_void(ssv); | |
462 | } | |
463 | break; | |
21312124 | 464 | } |
7473853a | 465 | |
29ecdb6f DM |
466 | assert ( Perl_sharedsv_find(aTHX_ sv) == ssv ); |
467 | } | |
6b85e4fe | 468 | |
6b85e4fe | 469 | |
29ecdb6f | 470 | /* Given a private SV, create and return an associated shared SV. |
7473853a SP |
471 | * Assumes lock is held. |
472 | */ | |
29ecdb6f DM |
473 | STATIC SV * |
474 | S_sharedsv_new_shared(pTHX_ SV *sv) | |
475 | { | |
476 | dTHXc; | |
477 | SV *ssv; | |
6b85e4fe | 478 | |
29ecdb6f DM |
479 | assert(PL_sharedsv_lock.owner == aTHX); |
480 | assert(aTHX != PL_sharedsv_space); | |
68795e93 | 481 | |
29ecdb6f DM |
482 | SHARED_CONTEXT; |
483 | ssv = newSV(0); | |
7473853a | 484 | SvREFCNT(ssv) = 0; /* Will be upped to 1 by Perl_sharedsv_associate */ |
29ecdb6f DM |
485 | sv_upgrade(ssv, SvTYPE(sv)); |
486 | CALLER_CONTEXT; | |
487 | Perl_sharedsv_associate(aTHX_ sv, ssv); | |
7473853a | 488 | return (ssv); |
29ecdb6f | 489 | } |
21312124 | 490 | |
21312124 | 491 | |
29ecdb6f | 492 | /* Given a shared SV, create and return an associated private SV. |
7473853a SP |
493 | * Assumes lock is held. |
494 | */ | |
29ecdb6f DM |
495 | STATIC SV * |
496 | S_sharedsv_new_private(pTHX_ SV *ssv) | |
497 | { | |
498 | SV *sv; | |
499 | ||
500 | assert(PL_sharedsv_lock.owner == aTHX); | |
501 | assert(aTHX != PL_sharedsv_space); | |
502 | ||
503 | sv = newSV(0); | |
504 | sv_upgrade(sv, SvTYPE(ssv)); | |
505 | Perl_sharedsv_associate(aTHX_ sv, ssv); | |
7473853a | 506 | return (sv); |
21312124 | 507 | } |
68795e93 | 508 | |
29ecdb6f | 509 | |
7473853a | 510 | /* A threadsafe version of SvREFCNT_dec(ssv) */ |
29ecdb6f DM |
511 | |
512 | STATIC void | |
513 | S_sharedsv_dec(pTHX_ SV* ssv) | |
68795e93 | 514 | { |
7473853a SP |
515 | if (! ssv) |
516 | return; | |
29ecdb6f DM |
517 | ENTER_LOCK; |
518 | if (SvREFCNT(ssv) > 1) { | |
7473853a SP |
519 | /* No side effects, so can do it lightweight */ |
520 | SvREFCNT_dec(ssv); | |
521 | } else { | |
522 | dTHXc; | |
523 | SHARED_CONTEXT; | |
524 | SvREFCNT_dec(ssv); | |
525 | CALLER_CONTEXT; | |
21312124 | 526 | } |
29ecdb6f | 527 | LEAVE_LOCK; |
68795e93 NIS |
528 | } |
529 | ||
7473853a SP |
530 | |
531 | /* Implements Perl-level share() and :shared */ | |
29ecdb6f | 532 | |
21312124 NIS |
533 | void |
534 | Perl_sharedsv_share(pTHX_ SV *sv) | |
535 | { | |
536 | switch(SvTYPE(sv)) { | |
537 | case SVt_PVGV: | |
7473853a SP |
538 | Perl_croak(aTHX_ "Cannot share globs yet"); |
539 | break; | |
21312124 NIS |
540 | |
541 | case SVt_PVCV: | |
7473853a SP |
542 | Perl_croak(aTHX_ "Cannot share subs yet"); |
543 | break; | |
85e0a142 | 544 | |
21312124 | 545 | default: |
7473853a SP |
546 | ENTER_LOCK; |
547 | (void) S_sharedsv_new_shared(aTHX_ sv); | |
548 | LEAVE_LOCK; | |
549 | SvSETMAGIC(sv); | |
550 | break; | |
21312124 NIS |
551 | } |
552 | } | |
68795e93 | 553 | |
7473853a | 554 | |
2a6601ce RGS |
555 | #ifdef WIN32 |
556 | /* Number of milliseconds from 1/1/1601 to 1/1/1970 */ | |
557 | #define EPOCH_BIAS 11644473600000. | |
558 | ||
559 | /* Returns relative time in milliseconds. (Adapted from Time::HiRes.) */ | |
560 | STATIC DWORD | |
561 | S_abs_2_rel_milli(double abs) | |
562 | { | |
563 | double rel; | |
564 | ||
565 | /* Get current time (in units of 100 nanoseconds since 1/1/1601) */ | |
566 | union { | |
05b59262 RGS |
567 | FILETIME ft; |
568 | __int64 i64; /* 'signed' to keep compilers happy */ | |
2a6601ce RGS |
569 | } now; |
570 | ||
571 | GetSystemTimeAsFileTime(&now.ft); | |
572 | ||
573 | /* Relative time in milliseconds */ | |
574 | rel = (abs * 1000.) - (((double)now.i64 / 10000.) - EPOCH_BIAS); | |
2a6601ce RGS |
575 | if (rel <= 0.0) { |
576 | return (0); | |
577 | } | |
578 | return (DWORD)rel; | |
579 | } | |
580 | ||
581 | #else | |
582 | # if defined(OS2) | |
7473853a | 583 | # define ABS2RELMILLI(abs) \ |
a0e036c1 | 584 | do { \ |
2666606c | 585 | abs -= (double)time(NULL); \ |
a0e036c1 MP |
586 | if (abs > 0) { abs *= 1000; } \ |
587 | else { abs = 0; } \ | |
588 | } while (0) | |
2a6601ce RGS |
589 | # endif /* OS2 */ |
590 | #endif /* WIN32 */ | |
a0e036c1 | 591 | |
7473853a | 592 | /* Do OS-specific condition timed wait */ |
29ecdb6f | 593 | |
a0e036c1 MP |
594 | bool |
595 | Perl_sharedsv_cond_timedwait(perl_cond *cond, perl_mutex *mut, double abs) | |
596 | { | |
597 | #if defined(NETWARE) || defined(FAKE_THREADS) || defined(I_MACH_CTHREADS) | |
598 | Perl_croak_nocontext("cond_timedwait not supported on this platform"); | |
599 | #else | |
600 | # ifdef WIN32 | |
601 | int got_it = 0; | |
602 | ||
a0e036c1 MP |
603 | cond->waiters++; |
604 | MUTEX_UNLOCK(mut); | |
605 | /* See comments in win32/win32thread.h COND_WAIT vis-a-vis race */ | |
2a6601ce | 606 | switch (WaitForSingleObject(cond->sem, S_abs_2_rel_milli(abs))) { |
a0e036c1 MP |
607 | case WAIT_OBJECT_0: got_it = 1; break; |
608 | case WAIT_TIMEOUT: break; | |
609 | default: | |
610 | /* WAIT_FAILED? WAIT_ABANDONED? others? */ | |
611 | Perl_croak_nocontext("panic: cond_timedwait (%ld)",GetLastError()); | |
612 | break; | |
613 | } | |
614 | MUTEX_LOCK(mut); | |
2666606c | 615 | cond->waiters--; |
7473853a | 616 | return (got_it); |
a0e036c1 MP |
617 | # else |
618 | # ifdef OS2 | |
619 | int rc, got_it = 0; | |
620 | STRLEN n_a; | |
621 | ||
622 | ABS2RELMILLI(abs); | |
623 | ||
624 | if ((rc = DosResetEventSem(*cond,&n_a)) && (rc != ERROR_ALREADY_RESET)) | |
625 | Perl_rc = rc, croak_with_os2error("panic: cond_timedwait-reset"); | |
626 | MUTEX_UNLOCK(mut); | |
627 | if (CheckOSError(DosWaitEventSem(*cond,abs)) | |
628 | && (rc != ERROR_INTERRUPT)) | |
629 | croak_with_os2error("panic: cond_timedwait"); | |
630 | if (rc == ERROR_INTERRUPT) errno = EINTR; | |
631 | MUTEX_LOCK(mut); | |
7473853a SP |
632 | return (got_it); |
633 | # else /* Hope you're I_PTHREAD! */ | |
a0e036c1 MP |
634 | struct timespec ts; |
635 | int got_it = 0; | |
636 | ||
637 | ts.tv_sec = (long)abs; | |
638 | abs -= (NV)ts.tv_sec; | |
639 | ts.tv_nsec = (long)(abs * 1000000000.0); | |
640 | ||
641 | switch (pthread_cond_timedwait(cond, mut, &ts)) { | |
642 | case 0: got_it = 1; break; | |
643 | case ETIMEDOUT: break; | |
cf0d1c66 JH |
644 | #ifdef OEMVS |
645 | case -1: | |
7473853a SP |
646 | if (errno == ETIMEDOUT || errno == EAGAIN) |
647 | break; | |
cf0d1c66 | 648 | #endif |
a0e036c1 MP |
649 | default: |
650 | Perl_croak_nocontext("panic: cond_timedwait"); | |
651 | break; | |
652 | } | |
7473853a | 653 | return (got_it); |
a0e036c1 MP |
654 | # endif /* OS2 */ |
655 | # endif /* WIN32 */ | |
656 | #endif /* NETWARE || FAKE_THREADS || I_MACH_CTHREADS */ | |
657 | } | |
658 | ||
dad67c22 | 659 | |
7473853a | 660 | /* Given a shared RV, copy it's value to a private RV, also copying the |
dad67c22 DM |
661 | * object status of the referent. |
662 | * If the private side is already an appropriate RV->SV combination, keep | |
663 | * it if possible. | |
664 | */ | |
dad67c22 DM |
665 | STATIC void |
666 | S_get_RV(pTHX_ SV *sv, SV *ssv) { | |
667 | SV *sobj = SvRV(ssv); | |
668 | SV *obj; | |
7473853a SP |
669 | if (! (SvROK(sv) && |
670 | ((obj = SvRV(sv))) && | |
671 | (Perl_sharedsv_find(aTHX_ obj) == sobj) && | |
672 | (SvTYPE(obj) == SvTYPE(sobj)))) | |
dad67c22 | 673 | { |
7473853a SP |
674 | /* Can't reuse obj */ |
675 | if (SvROK(sv)) { | |
676 | SvREFCNT_dec(SvRV(sv)); | |
677 | } else { | |
678 | assert(SvTYPE(sv) >= SVt_RV); | |
679 | sv_setsv_nomg(sv, &PL_sv_undef); | |
680 | SvROK_on(sv); | |
681 | } | |
682 | obj = S_sharedsv_new_private(aTHX_ SvRV(ssv)); | |
683 | SvRV_set(sv, obj); | |
dad67c22 DM |
684 | } |
685 | ||
686 | if (SvOBJECT(obj)) { | |
7473853a SP |
687 | /* Remove any old blessing */ |
688 | SvREFCNT_dec(SvSTASH(obj)); | |
689 | SvOBJECT_off(obj); | |
dad67c22 DM |
690 | } |
691 | if (SvOBJECT(sobj)) { | |
7473853a SP |
692 | /* Add any new old blessing */ |
693 | STRLEN len; | |
694 | char* stash_ptr = SvPV((SV*) SvSTASH(sobj), len); | |
695 | HV* stash = gv_stashpvn(stash_ptr, len, TRUE); | |
696 | SvOBJECT_on(obj); | |
697 | SvSTASH_set(obj, (HV*)SvREFCNT_inc(stash)); | |
dad67c22 DM |
698 | } |
699 | } | |
700 | ||
701 | ||
29ecdb6f DM |
702 | /* ------------ PERL_MAGIC_shared_scalar(n) functions -------------- */ |
703 | ||
7473853a | 704 | /* Get magic for PERL_MAGIC_shared_scalar(n) */ |
68795e93 | 705 | |
21312124 NIS |
706 | int |
707 | sharedsv_scalar_mg_get(pTHX_ SV *sv, MAGIC *mg) | |
68795e93 | 708 | { |
29ecdb6f DM |
709 | SV *ssv = (SV *) mg->mg_ptr; |
710 | assert(ssv); | |
21312124 | 711 | |
6d56dc1c | 712 | ENTER_LOCK; |
29ecdb6f | 713 | if (SvROK(ssv)) { |
7473853a SP |
714 | S_get_RV(aTHX_ sv, ssv); |
715 | } else { | |
716 | sv_setsv_nomg(sv, ssv); | |
21312124 | 717 | } |
6d56dc1c | 718 | LEAVE_LOCK; |
7473853a | 719 | return (0); |
21312124 NIS |
720 | } |
721 | ||
7473853a SP |
722 | /* Copy the contents of a private SV to a shared SV. |
723 | * Used by various mg_set()-type functions. | |
724 | * Assumes lock is held. | |
725 | */ | |
6b85e4fe | 726 | void |
29ecdb6f | 727 | sharedsv_scalar_store(pTHX_ SV *sv, SV *ssv) |
21312124 NIS |
728 | { |
729 | dTHXc; | |
21312124 | 730 | bool allowed = TRUE; |
29ecdb6f DM |
731 | |
732 | assert(PL_sharedsv_lock.owner == aTHX); | |
21312124 | 733 | if (SvROK(sv)) { |
7473853a SP |
734 | SV *obj = SvRV(sv); |
735 | SV *sobj = Perl_sharedsv_find(aTHX_ obj); | |
736 | if (sobj) { | |
737 | SHARED_CONTEXT; | |
2a6601ce | 738 | (void)SvUPGRADE(ssv, SVt_RV); |
7473853a SP |
739 | sv_setsv_nomg(ssv, &PL_sv_undef); |
740 | ||
741 | SvRV_set(ssv, SvREFCNT_inc(sobj)); | |
742 | SvROK_on(ssv); | |
743 | if (SvOBJECT(sobj)) { | |
744 | /* Remove any old blessing */ | |
745 | SvREFCNT_dec(SvSTASH(sobj)); | |
746 | SvOBJECT_off(sobj); | |
747 | } | |
748 | if (SvOBJECT(obj)) { | |
749 | SV* fake_stash = newSVpv(HvNAME_get(SvSTASH(obj)),0); | |
750 | SvOBJECT_on(sobj); | |
751 | SvSTASH_set(sobj, (HV*)fake_stash); | |
752 | } | |
753 | CALLER_CONTEXT; | |
754 | } else { | |
755 | allowed = FALSE; | |
756 | } | |
757 | } else { | |
5c360ac5 | 758 | SvTEMP_off(sv); |
7473853a SP |
759 | SHARED_CONTEXT; |
760 | sv_setsv_nomg(ssv, sv); | |
761 | if (SvOBJECT(ssv)) { | |
762 | /* Remove any old blessing */ | |
763 | SvREFCNT_dec(SvSTASH(ssv)); | |
764 | SvOBJECT_off(ssv); | |
765 | } | |
766 | if (SvOBJECT(sv)) { | |
767 | SV* fake_stash = newSVpv(HvNAME_get(SvSTASH(sv)),0); | |
768 | SvOBJECT_on(ssv); | |
769 | SvSTASH_set(ssv, (HV*)fake_stash); | |
770 | } | |
771 | CALLER_CONTEXT; | |
21312124 | 772 | } |
21312124 | 773 | if (!allowed) { |
7473853a | 774 | Perl_croak(aTHX_ "Invalid value for shared scalar"); |
21312124 | 775 | } |
6b85e4fe NIS |
776 | } |
777 | ||
7473853a | 778 | /* Set magic for PERL_MAGIC_shared_scalar(n) */ |
29ecdb6f | 779 | |
6b85e4fe NIS |
780 | int |
781 | sharedsv_scalar_mg_set(pTHX_ SV *sv, MAGIC *mg) | |
782 | { | |
29ecdb6f DM |
783 | SV *ssv = (SV*)(mg->mg_ptr); |
784 | assert(ssv); | |
6b85e4fe | 785 | ENTER_LOCK; |
29ecdb6f | 786 | if (SvTYPE(ssv) < SvTYPE(sv)) { |
7473853a SP |
787 | dTHXc; |
788 | SHARED_CONTEXT; | |
789 | sv_upgrade(ssv, SvTYPE(sv)); | |
790 | CALLER_CONTEXT; | |
29ecdb6f DM |
791 | } |
792 | sharedsv_scalar_store(aTHX_ sv, ssv); | |
6b85e4fe | 793 | LEAVE_LOCK; |
7473853a | 794 | return (0); |
68795e93 NIS |
795 | } |
796 | ||
7473853a | 797 | /* Free magic for PERL_MAGIC_shared_scalar(n) */ |
a446a88f NIS |
798 | |
799 | int | |
29ecdb6f | 800 | sharedsv_scalar_mg_free(pTHX_ SV *sv, MAGIC *mg) |
a446a88f | 801 | { |
29ecdb6f | 802 | S_sharedsv_dec(aTHX_ (SV*)mg->mg_ptr); |
7473853a | 803 | return (0); |
21312124 | 804 | } |
68795e93 NIS |
805 | |
806 | /* | |
29ecdb6f | 807 | * Called during cloning of PERL_MAGIC_shared_scalar(n) magic in new thread |
21312124 NIS |
808 | */ |
809 | int | |
810 | sharedsv_scalar_mg_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *param) | |
811 | { | |
7473853a SP |
812 | SvREFCNT_inc_void(mg->mg_ptr); |
813 | return (0); | |
21312124 | 814 | } |
68795e93 | 815 | |
7473853a | 816 | #ifdef MGf_LOCAL |
a5063e7c DM |
817 | /* |
818 | * Called during local $shared | |
819 | */ | |
820 | int | |
821 | sharedsv_scalar_mg_local(pTHX_ SV* nsv, MAGIC *mg) | |
822 | { | |
823 | MAGIC *nmg; | |
29ecdb6f DM |
824 | SV *ssv = (SV *) mg->mg_ptr; |
825 | if (ssv) { | |
7473853a SP |
826 | ENTER_LOCK; |
827 | SvREFCNT_inc_void(ssv); | |
828 | LEAVE_LOCK; | |
a5063e7c DM |
829 | } |
830 | nmg = sv_magicext(nsv, mg->mg_obj, mg->mg_type, mg->mg_virtual, | |
7473853a | 831 | mg->mg_ptr, mg->mg_len); |
a5063e7c DM |
832 | nmg->mg_flags = mg->mg_flags; |
833 | nmg->mg_private = mg->mg_private; | |
834 | ||
7473853a | 835 | return (0); |
a5063e7c | 836 | } |
7473853a | 837 | #endif |
a5063e7c | 838 | |
21312124 | 839 | MGVTBL sharedsv_scalar_vtbl = { |
7473853a SP |
840 | sharedsv_scalar_mg_get, /* get */ |
841 | sharedsv_scalar_mg_set, /* set */ | |
842 | 0, /* len */ | |
843 | 0, /* clear */ | |
844 | sharedsv_scalar_mg_free, /* free */ | |
845 | 0, /* copy */ | |
846 | sharedsv_scalar_mg_dup, /* dup */ | |
847 | #ifdef MGf_LOCAL | |
848 | sharedsv_scalar_mg_local, /* local */ | |
849 | #endif | |
21312124 | 850 | }; |
68795e93 | 851 | |
29ecdb6f DM |
852 | /* ------------ PERL_MAGIC_tiedelem(p) functions -------------- */ |
853 | ||
7473853a | 854 | /* Get magic for PERL_MAGIC_tiedelem(p) */ |
29ecdb6f | 855 | |
21312124 NIS |
856 | int |
857 | sharedsv_elem_mg_FETCH(pTHX_ SV *sv, MAGIC *mg) | |
68795e93 | 858 | { |
21312124 | 859 | dTHXc; |
29ecdb6f | 860 | SV *saggregate = S_sharedsv_from_obj(aTHX_ mg->mg_obj); |
21312124 NIS |
861 | SV** svp; |
862 | ||
6b85e4fe | 863 | ENTER_LOCK; |
29ecdb6f | 864 | if (SvTYPE(saggregate) == SVt_PVAV) { |
7473853a SP |
865 | assert ( mg->mg_ptr == 0 ); |
866 | SHARED_CONTEXT; | |
867 | svp = av_fetch((AV*) saggregate, mg->mg_len, 0); | |
868 | } else { | |
869 | char *key = mg->mg_ptr; | |
870 | STRLEN len = mg->mg_len; | |
871 | assert ( mg->mg_ptr != 0 ); | |
872 | if (mg->mg_len == HEf_SVKEY) { | |
873 | key = SvPV((SV *) mg->mg_ptr, len); | |
874 | } | |
875 | SHARED_CONTEXT; | |
876 | svp = hv_fetch((HV*) saggregate, key, len, 0); | |
21312124 | 877 | } |
6b85e4fe | 878 | CALLER_CONTEXT; |
21312124 | 879 | if (svp) { |
7473853a SP |
880 | /* Exists in the array */ |
881 | if (SvROK(*svp)) { | |
882 | S_get_RV(aTHX_ sv, *svp); | |
883 | } else { | |
884 | /* XXX Can this branch ever happen? DAPM */ | |
885 | /* XXX assert("no such branch"); */ | |
886 | Perl_sharedsv_associate(aTHX_ sv, *svp); | |
887 | sv_setsv(sv, *svp); | |
888 | } | |
889 | } else { | |
890 | /* Not in the array */ | |
891 | sv_setsv(sv, &PL_sv_undef); | |
68795e93 | 892 | } |
6b85e4fe | 893 | LEAVE_LOCK; |
7473853a | 894 | return (0); |
68795e93 NIS |
895 | } |
896 | ||
7473853a | 897 | /* Set magic for PERL_MAGIC_tiedelem(p) */ |
29ecdb6f | 898 | |
21312124 NIS |
899 | int |
900 | sharedsv_elem_mg_STORE(pTHX_ SV *sv, MAGIC *mg) | |
901 | { | |
902 | dTHXc; | |
29ecdb6f | 903 | SV *saggregate = S_sharedsv_from_obj(aTHX_ mg->mg_obj); |
6b85e4fe | 904 | SV **svp; |
21312124 NIS |
905 | /* Theory - SV itself is magically shared - and we have ordered the |
906 | magic such that by the time we get here it has been stored | |
907 | to its shared counterpart | |
908 | */ | |
6d56dc1c | 909 | ENTER_LOCK; |
29ecdb6f DM |
910 | assert(saggregate); |
911 | if (SvTYPE(saggregate) == SVt_PVAV) { | |
7473853a SP |
912 | assert ( mg->mg_ptr == 0 ); |
913 | SHARED_CONTEXT; | |
914 | svp = av_fetch((AV*) saggregate, mg->mg_len, 1); | |
915 | } else { | |
916 | char *key = mg->mg_ptr; | |
917 | STRLEN len = mg->mg_len; | |
918 | assert ( mg->mg_ptr != 0 ); | |
919 | if (mg->mg_len == HEf_SVKEY) | |
920 | key = SvPV((SV *) mg->mg_ptr, len); | |
921 | SHARED_CONTEXT; | |
922 | svp = hv_fetch((HV*) saggregate, key, len, 1); | |
21312124 | 923 | } |
6b85e4fe | 924 | CALLER_CONTEXT; |
29ecdb6f DM |
925 | Perl_sharedsv_associate(aTHX_ sv, *svp); |
926 | sharedsv_scalar_store(aTHX_ sv, *svp); | |
6b85e4fe | 927 | LEAVE_LOCK; |
7473853a | 928 | return (0); |
21312124 | 929 | } |
68795e93 | 930 | |
7473853a | 931 | /* Clear magic for PERL_MAGIC_tiedelem(p) */ |
29ecdb6f | 932 | |
21312124 NIS |
933 | int |
934 | sharedsv_elem_mg_DELETE(pTHX_ SV *sv, MAGIC *mg) | |
68795e93 | 935 | { |
21312124 | 936 | dTHXc; |
057e91b3 | 937 | MAGIC *shmg; |
29ecdb6f | 938 | SV *saggregate = S_sharedsv_from_obj(aTHX_ mg->mg_obj); |
6b85e4fe NIS |
939 | ENTER_LOCK; |
940 | sharedsv_elem_mg_FETCH(aTHX_ sv, mg); | |
057e91b3 | 941 | if ((shmg = mg_find(sv, PERL_MAGIC_shared_scalar))) |
7473853a | 942 | sharedsv_scalar_mg_get(aTHX_ sv, shmg); |
29ecdb6f | 943 | if (SvTYPE(saggregate) == SVt_PVAV) { |
7473853a SP |
944 | SHARED_CONTEXT; |
945 | av_delete((AV*) saggregate, mg->mg_len, G_DISCARD); | |
946 | } else { | |
947 | char *key = mg->mg_ptr; | |
948 | STRLEN len = mg->mg_len; | |
949 | assert ( mg->mg_ptr != 0 ); | |
950 | if (mg->mg_len == HEf_SVKEY) | |
951 | key = SvPV((SV *) mg->mg_ptr, len); | |
952 | SHARED_CONTEXT; | |
953 | hv_delete((HV*) saggregate, key, len, G_DISCARD); | |
21312124 | 954 | } |
6b85e4fe NIS |
955 | CALLER_CONTEXT; |
956 | LEAVE_LOCK; | |
7473853a | 957 | return (0); |
21312124 NIS |
958 | } |
959 | ||
29ecdb6f DM |
960 | /* Called during cloning of PERL_MAGIC_tiedelem(p) magic in new |
961 | * thread */ | |
962 | ||
21312124 NIS |
963 | int |
964 | sharedsv_elem_mg_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *param) | |
965 | { | |
7473853a | 966 | SvREFCNT_inc_void(S_sharedsv_from_obj(aTHX_ mg->mg_obj)); |
29ecdb6f | 967 | assert(mg->mg_flags & MGf_DUP); |
7473853a | 968 | return (0); |
21312124 NIS |
969 | } |
970 | ||
971 | MGVTBL sharedsv_elem_vtbl = { | |
7473853a SP |
972 | sharedsv_elem_mg_FETCH, /* get */ |
973 | sharedsv_elem_mg_STORE, /* set */ | |
974 | 0, /* len */ | |
975 | sharedsv_elem_mg_DELETE, /* clear */ | |
976 | 0, /* free */ | |
977 | 0, /* copy */ | |
978 | sharedsv_elem_mg_dup, /* dup */ | |
979 | #ifdef MGf_LOCAL | |
980 | 0, /* local */ | |
981 | #endif | |
21312124 NIS |
982 | }; |
983 | ||
29ecdb6f DM |
984 | /* ------------ PERL_MAGIC_tied(P) functions -------------- */ |
985 | ||
7473853a | 986 | /* Len magic for PERL_MAGIC_tied(P) */ |
29ecdb6f | 987 | |
21312124 NIS |
988 | U32 |
989 | sharedsv_array_mg_FETCHSIZE(pTHX_ SV *sv, MAGIC *mg) | |
990 | { | |
991 | dTHXc; | |
29ecdb6f | 992 | SV *ssv = (SV *) mg->mg_ptr; |
21312124 NIS |
993 | U32 val; |
994 | SHARED_EDIT; | |
29ecdb6f | 995 | if (SvTYPE(ssv) == SVt_PVAV) { |
7473853a SP |
996 | val = av_len((AV*) ssv); |
997 | } else { | |
998 | /* Not actually defined by tie API but ... */ | |
999 | val = HvKEYS((HV*) ssv); | |
21312124 NIS |
1000 | } |
1001 | SHARED_RELEASE; | |
7473853a | 1002 | return (val); |
21312124 NIS |
1003 | } |
1004 | ||
7473853a | 1005 | /* Clear magic for PERL_MAGIC_tied(P) */ |
29ecdb6f | 1006 | |
21312124 NIS |
1007 | int |
1008 | sharedsv_array_mg_CLEAR(pTHX_ SV *sv, MAGIC *mg) | |
1009 | { | |
1010 | dTHXc; | |
29ecdb6f | 1011 | SV *ssv = (SV *) mg->mg_ptr; |
21312124 | 1012 | SHARED_EDIT; |
29ecdb6f | 1013 | if (SvTYPE(ssv) == SVt_PVAV) { |
7473853a SP |
1014 | av_clear((AV*) ssv); |
1015 | } else { | |
1016 | hv_clear((HV*) ssv); | |
21312124 NIS |
1017 | } |
1018 | SHARED_RELEASE; | |
7473853a | 1019 | return (0); |
21312124 NIS |
1020 | } |
1021 | ||
7473853a | 1022 | /* Free magic for PERL_MAGIC_tied(P) */ |
29ecdb6f | 1023 | |
21312124 NIS |
1024 | int |
1025 | sharedsv_array_mg_free(pTHX_ SV *sv, MAGIC *mg) | |
1026 | { | |
29ecdb6f | 1027 | S_sharedsv_dec(aTHX_ (SV*)mg->mg_ptr); |
7473853a | 1028 | return (0); |
68795e93 NIS |
1029 | } |
1030 | ||
1031 | /* | |
7473853a | 1032 | * Copy magic for PERL_MAGIC_tied(P) |
21312124 NIS |
1033 | * This is called when perl is about to access an element of |
1034 | * the array - | |
1035 | */ | |
1036 | int | |
1037 | sharedsv_array_mg_copy(pTHX_ SV *sv, MAGIC* mg, | |
7473853a | 1038 | SV *nsv, const char *name, int namlen) |
21312124 | 1039 | { |
21312124 | 1040 | MAGIC *nmg = sv_magicext(nsv,mg->mg_obj, |
7473853a SP |
1041 | toLOWER(mg->mg_type),&sharedsv_elem_vtbl, |
1042 | name, namlen); | |
21312124 | 1043 | nmg->mg_flags |= MGf_DUP; |
7473853a | 1044 | return (1); |
21312124 NIS |
1045 | } |
1046 | ||
29ecdb6f DM |
1047 | /* Called during cloning of PERL_MAGIC_tied(P) magic in new thread */ |
1048 | ||
21312124 NIS |
1049 | int |
1050 | sharedsv_array_mg_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *param) | |
1051 | { | |
7473853a | 1052 | SvREFCNT_inc_void((SV*)mg->mg_ptr); |
29ecdb6f | 1053 | assert(mg->mg_flags & MGf_DUP); |
7473853a | 1054 | return (0); |
21312124 NIS |
1055 | } |
1056 | ||
1057 | MGVTBL sharedsv_array_vtbl = { | |
7473853a SP |
1058 | 0, /* get */ |
1059 | 0, /* set */ | |
1060 | sharedsv_array_mg_FETCHSIZE,/* len */ | |
1061 | sharedsv_array_mg_CLEAR, /* clear */ | |
1062 | sharedsv_array_mg_free, /* free */ | |
1063 | sharedsv_array_mg_copy, /* copy */ | |
1064 | sharedsv_array_mg_dup, /* dup */ | |
1065 | #ifdef MGf_LOCAL | |
1066 | 0, /* local */ | |
1067 | #endif | |
21312124 NIS |
1068 | }; |
1069 | ||
68795e93 | 1070 | |
ba2940ce | 1071 | /* Recursively unlocks a shared sv. */ |
68795e93 NIS |
1072 | |
1073 | void | |
29ecdb6f | 1074 | Perl_sharedsv_unlock(pTHX_ SV *ssv) |
68795e93 | 1075 | { |
29ecdb6f DM |
1076 | user_lock *ul = S_get_userlock(aTHX_ ssv, 0); |
1077 | assert(ul); | |
1078 | recursive_lock_release(aTHX_ &ul->lock); | |
68795e93 NIS |
1079 | } |
1080 | ||
68795e93 | 1081 | |
ba2940ce JH |
1082 | /* Recursive locks on a sharedsv. |
1083 | * Locks are dynamically scoped at the level of the first lock. | |
1084 | */ | |
68795e93 | 1085 | void |
29ecdb6f | 1086 | Perl_sharedsv_lock(pTHX_ SV *ssv) |
68795e93 | 1087 | { |
29ecdb6f | 1088 | user_lock *ul; |
7473853a SP |
1089 | if (! ssv) |
1090 | return; | |
29ecdb6f DM |
1091 | ul = S_get_userlock(aTHX_ ssv, 1); |
1092 | recursive_lock_acquire(aTHX_ &ul->lock, __FILE__, __LINE__); | |
68795e93 NIS |
1093 | } |
1094 | ||
7473853a | 1095 | /* Handles calls from lock() builtin via PL_lockhook */ |
afe38520 | 1096 | |
21312124 NIS |
1097 | void |
1098 | Perl_sharedsv_locksv(pTHX_ SV *sv) | |
1099 | { | |
29ecdb6f | 1100 | SV *ssv; |
afe38520 | 1101 | |
7473853a SP |
1102 | if (SvROK(sv)) |
1103 | sv = SvRV(sv); | |
29ecdb6f | 1104 | ssv = Perl_sharedsv_find(aTHX_ sv); |
7473853a | 1105 | if (!ssv) |
afe38520 | 1106 | croak("lock can only be used on shared values"); |
29ecdb6f | 1107 | Perl_sharedsv_lock(aTHX_ ssv); |
b050c948 AB |
1108 | } |
1109 | ||
b050c948 | 1110 | |
ba2940ce | 1111 | /* Saves a space for keeping SVs wider than an interpreter. */ |
21312124 NIS |
1112 | |
1113 | void | |
1114 | Perl_sharedsv_init(pTHX) | |
1115 | { | |
7473853a SP |
1116 | dTHXc; |
1117 | /* This pair leaves us in shared context ... */ | |
1118 | PL_sharedsv_space = perl_alloc(); | |
1119 | perl_construct(PL_sharedsv_space); | |
1120 | CALLER_CONTEXT; | |
1121 | recursive_lock_init(aTHX_ &PL_sharedsv_lock); | |
1122 | PL_lockhook = &Perl_sharedsv_locksv; | |
1123 | PL_sharehook = &Perl_sharedsv_share; | |
b050c948 AB |
1124 | } |
1125 | ||
73e09c8f JH |
1126 | #endif /* USE_ITHREADS */ |
1127 | ||
7473853a | 1128 | MODULE = threads::shared PACKAGE = threads::shared::tie |
b050c948 | 1129 | |
21312124 | 1130 | PROTOTYPES: DISABLE |
b050c948 | 1131 | |
73e09c8f | 1132 | #ifdef USE_ITHREADS |
6b85e4fe | 1133 | |
21312124 | 1134 | void |
29ecdb6f | 1135 | PUSH(SV *obj, ...) |
7473853a SP |
1136 | CODE: |
1137 | dTHXc; | |
1138 | SV *sobj = S_sharedsv_from_obj(aTHX_ obj); | |
1139 | int i; | |
1140 | for (i = 1; i < items; i++) { | |
1141 | SV* tmp = newSVsv(ST(i)); | |
1142 | SV *stmp; | |
1143 | ENTER_LOCK; | |
1144 | stmp = S_sharedsv_new_shared(aTHX_ tmp); | |
1145 | sharedsv_scalar_store(aTHX_ tmp, stmp); | |
1146 | SHARED_CONTEXT; | |
1147 | av_push((AV*) sobj, stmp); | |
1148 | SvREFCNT_inc_void(stmp); | |
1149 | SHARED_RELEASE; | |
1150 | SvREFCNT_dec(tmp); | |
1151 | } | |
1152 | ||
b050c948 | 1153 | |
21312124 | 1154 | void |
29ecdb6f | 1155 | UNSHIFT(SV *obj, ...) |
7473853a SP |
1156 | CODE: |
1157 | dTHXc; | |
1158 | SV *sobj = S_sharedsv_from_obj(aTHX_ obj); | |
1159 | int i; | |
1160 | ENTER_LOCK; | |
1161 | SHARED_CONTEXT; | |
1162 | av_unshift((AV*)sobj, items - 1); | |
1163 | CALLER_CONTEXT; | |
1164 | for (i = 1; i < items; i++) { | |
1165 | SV *tmp = newSVsv(ST(i)); | |
1166 | SV *stmp = S_sharedsv_new_shared(aTHX_ tmp); | |
1167 | sharedsv_scalar_store(aTHX_ tmp, stmp); | |
1168 | SHARED_CONTEXT; | |
1169 | av_store((AV*) sobj, i - 1, stmp); | |
1170 | SvREFCNT_inc_void(stmp); | |
1171 | CALLER_CONTEXT; | |
1172 | SvREFCNT_dec(tmp); | |
1173 | } | |
1174 | LEAVE_LOCK; | |
1175 | ||
b050c948 | 1176 | |
21312124 | 1177 | void |
29ecdb6f | 1178 | POP(SV *obj) |
7473853a SP |
1179 | CODE: |
1180 | dTHXc; | |
1181 | SV *sobj = S_sharedsv_from_obj(aTHX_ obj); | |
1182 | SV* ssv; | |
1183 | ENTER_LOCK; | |
1184 | SHARED_CONTEXT; | |
1185 | ssv = av_pop((AV*)sobj); | |
1186 | CALLER_CONTEXT; | |
1187 | ST(0) = sv_newmortal(); | |
1188 | Perl_sharedsv_associate(aTHX_ ST(0), ssv); | |
1189 | SvREFCNT_dec(ssv); | |
1190 | LEAVE_LOCK; | |
1191 | /* XSRETURN(1); - implied */ | |
1192 | ||
b050c948 | 1193 | |
21312124 | 1194 | void |
29ecdb6f | 1195 | SHIFT(SV *obj) |
7473853a SP |
1196 | CODE: |
1197 | dTHXc; | |
1198 | SV *sobj = S_sharedsv_from_obj(aTHX_ obj); | |
1199 | SV* ssv; | |
1200 | ENTER_LOCK; | |
1201 | SHARED_CONTEXT; | |
1202 | ssv = av_shift((AV*)sobj); | |
1203 | CALLER_CONTEXT; | |
1204 | ST(0) = sv_newmortal(); | |
1205 | Perl_sharedsv_associate(aTHX_ ST(0), ssv); | |
1206 | SvREFCNT_dec(ssv); | |
1207 | LEAVE_LOCK; | |
1208 | /* XSRETURN(1); - implied */ | |
1209 | ||
b050c948 | 1210 | |
21312124 | 1211 | void |
29ecdb6f | 1212 | EXTEND(SV *obj, IV count) |
7473853a SP |
1213 | CODE: |
1214 | dTHXc; | |
1215 | SV *sobj = S_sharedsv_from_obj(aTHX_ obj); | |
1216 | SHARED_EDIT; | |
1217 | av_extend((AV*)sobj, count); | |
1218 | SHARED_RELEASE; | |
1219 | ||
b050c948 | 1220 | |
21312124 | 1221 | void |
29ecdb6f | 1222 | STORESIZE(SV *obj,IV count) |
7473853a SP |
1223 | CODE: |
1224 | dTHXc; | |
1225 | SV *sobj = S_sharedsv_from_obj(aTHX_ obj); | |
1226 | SHARED_EDIT; | |
1227 | av_fill((AV*) sobj, count); | |
1228 | SHARED_RELEASE; | |
6b85e4fe NIS |
1229 | |
1230 | ||
1231 | void | |
29ecdb6f | 1232 | EXISTS(SV *obj, SV *index) |
7473853a SP |
1233 | CODE: |
1234 | dTHXc; | |
1235 | SV *sobj = S_sharedsv_from_obj(aTHX_ obj); | |
1236 | bool exists; | |
1237 | if (SvTYPE(sobj) == SVt_PVAV) { | |
1238 | SHARED_EDIT; | |
1239 | exists = av_exists((AV*) sobj, SvIV(index)); | |
1240 | } else { | |
1241 | STRLEN len; | |
1242 | char *key = SvPV(index,len); | |
1243 | SHARED_EDIT; | |
1244 | exists = hv_exists((HV*) sobj, key, len); | |
1245 | } | |
1246 | SHARED_RELEASE; | |
1247 | ST(0) = (exists) ? &PL_sv_yes : &PL_sv_no; | |
1248 | /* XSRETURN(1); - implied */ | |
b050c948 AB |
1249 | |
1250 | ||
1251 | void | |
29ecdb6f | 1252 | FIRSTKEY(SV *obj) |
7473853a SP |
1253 | CODE: |
1254 | dTHXc; | |
1255 | SV *sobj = S_sharedsv_from_obj(aTHX_ obj); | |
1256 | char* key = NULL; | |
1257 | I32 len = 0; | |
1258 | HE* entry; | |
1259 | ENTER_LOCK; | |
1260 | SHARED_CONTEXT; | |
1261 | hv_iterinit((HV*) sobj); | |
1262 | entry = hv_iternext((HV*) sobj); | |
1263 | if (entry) { | |
1264 | key = hv_iterkey(entry,&len); | |
1265 | CALLER_CONTEXT; | |
1266 | ST(0) = sv_2mortal(newSVpv(key, len)); | |
1267 | } else { | |
1268 | CALLER_CONTEXT; | |
1269 | ST(0) = &PL_sv_undef; | |
1270 | } | |
1271 | LEAVE_LOCK; | |
1272 | /* XSRETURN(1); - implied */ | |
1273 | ||
b050c948 | 1274 | |
866fba46 | 1275 | void |
29ecdb6f | 1276 | NEXTKEY(SV *obj, SV *oldkey) |
7473853a SP |
1277 | CODE: |
1278 | dTHXc; | |
1279 | SV *sobj = S_sharedsv_from_obj(aTHX_ obj); | |
1280 | char* key = NULL; | |
1281 | I32 len = 0; | |
1282 | HE* entry; | |
2a6601ce RGS |
1283 | |
1284 | PERL_UNUSED_VAR(oldkey); | |
1285 | ||
7473853a SP |
1286 | ENTER_LOCK; |
1287 | SHARED_CONTEXT; | |
1288 | entry = hv_iternext((HV*) sobj); | |
1289 | if (entry) { | |
1290 | key = hv_iterkey(entry,&len); | |
1291 | CALLER_CONTEXT; | |
1292 | ST(0) = sv_2mortal(newSVpv(key, len)); | |
1293 | } else { | |
1294 | CALLER_CONTEXT; | |
1295 | ST(0) = &PL_sv_undef; | |
1296 | } | |
1297 | LEAVE_LOCK; | |
1298 | /* XSRETURN(1); - implied */ | |
1299 | ||
1300 | ||
1301 | MODULE = threads::shared PACKAGE = threads::shared | |
21312124 NIS |
1302 | |
1303 | PROTOTYPES: ENABLE | |
866fba46 | 1304 | |
68795e93 | 1305 | void |
39ec4146 | 1306 | _id(SV *myref) |
7473853a SP |
1307 | PROTOTYPE: \[$@%] |
1308 | PREINIT: | |
1309 | SV *ssv; | |
1310 | CODE: | |
39ec4146 RGS |
1311 | myref = SvRV(myref); |
1312 | if (SvROK(myref)) | |
1313 | myref = SvRV(myref); | |
1314 | ssv = Perl_sharedsv_find(aTHX_ myref); | |
7473853a SP |
1315 | if (! ssv) |
1316 | XSRETURN_UNDEF; | |
1317 | ST(0) = sv_2mortal(newSVuv(PTR2UV(ssv))); | |
1318 | /* XSRETURN(1); - implied */ | |
9c4972d9 NIS |
1319 | |
1320 | ||
1321 | void | |
39ec4146 | 1322 | _refcnt(SV *myref) |
7473853a SP |
1323 | PROTOTYPE: \[$@%] |
1324 | PREINIT: | |
1325 | SV *ssv; | |
1326 | CODE: | |
39ec4146 RGS |
1327 | myref = SvRV(myref); |
1328 | if (SvROK(myref)) | |
1329 | myref = SvRV(myref); | |
1330 | ssv = Perl_sharedsv_find(aTHX_ myref); | |
7473853a | 1331 | if (! ssv) { |
7c8caac0 JH |
1332 | if (ckWARN(WARN_THREADS)) { |
1333 | Perl_warner(aTHX_ packWARN(WARN_THREADS), | |
1334 | "%" SVf " is not shared", ST(0)); | |
1335 | } | |
7473853a SP |
1336 | XSRETURN_UNDEF; |
1337 | } | |
1338 | ST(0) = sv_2mortal(newSViv(SvREFCNT(ssv))); | |
1339 | /* XSRETURN(1); - implied */ | |
1340 | ||
1341 | ||
1342 | void | |
39ec4146 | 1343 | share(SV *myref) |
7473853a SP |
1344 | PROTOTYPE: \[$@%] |
1345 | CODE: | |
39ec4146 | 1346 | if (! SvROK(myref)) |
56fcff86 | 1347 | Perl_croak(aTHX_ "Argument to share needs to be passed as ref"); |
39ec4146 RGS |
1348 | myref = SvRV(myref); |
1349 | if (SvROK(myref)) | |
1350 | myref = SvRV(myref); | |
1351 | Perl_sharedsv_share(aTHX_ myref); | |
1352 | ST(0) = sv_2mortal(newRV_inc(myref)); | |
7473853a | 1353 | /* XSRETURN(1); - implied */ |
a446a88f | 1354 | |
6f942b98 AB |
1355 | |
1356 | void | |
7473853a SP |
1357 | cond_wait(SV *ref_cond, SV *ref_lock = 0) |
1358 | PROTOTYPE: \[$@%];\[$@%] | |
1359 | PREINIT: | |
1360 | SV *ssv; | |
1361 | perl_cond* user_condition; | |
1362 | int locks; | |
1363 | user_lock *ul; | |
1364 | CODE: | |
1365 | if (!SvROK(ref_cond)) | |
56fcff86 | 1366 | Perl_croak(aTHX_ "Argument to cond_wait needs to be passed as ref"); |
7473853a SP |
1367 | ref_cond = SvRV(ref_cond); |
1368 | if (SvROK(ref_cond)) | |
1369 | ref_cond = SvRV(ref_cond); | |
1370 | ssv = Perl_sharedsv_find(aTHX_ ref_cond); | |
1371 | if (! ssv) | |
1372 | Perl_croak(aTHX_ "cond_wait can only be used on shared values"); | |
1373 | ul = S_get_userlock(aTHX_ ssv, 1); | |
1374 | ||
1375 | user_condition = &ul->user_cond; | |
1376 | if (ref_lock && (ref_cond != ref_lock)) { | |
1377 | if (!SvROK(ref_lock)) | |
1378 | Perl_croak(aTHX_ "cond_wait lock needs to be passed as ref"); | |
1379 | ref_lock = SvRV(ref_lock); | |
1380 | if (SvROK(ref_lock)) ref_lock = SvRV(ref_lock); | |
1381 | ssv = Perl_sharedsv_find(aTHX_ ref_lock); | |
1382 | if (! ssv) | |
1383 | Perl_croak(aTHX_ "cond_wait lock must be a shared value"); | |
1384 | ul = S_get_userlock(aTHX_ ssv, 1); | |
1385 | } | |
1386 | if (ul->lock.owner != aTHX) | |
1387 | croak("You need a lock before you can cond_wait"); | |
ba2940ce | 1388 | |
7473853a SP |
1389 | /* Stealing the members of the lock object worries me - NI-S */ |
1390 | MUTEX_LOCK(&ul->lock.mutex); | |
1391 | ul->lock.owner = NULL; | |
1392 | locks = ul->lock.locks; | |
1393 | ul->lock.locks = 0; | |
1394 | ||
ba2940ce JH |
1395 | /* Since we are releasing the lock here, we need to tell other |
1396 | * people that it is ok to go ahead and use it */ | |
7473853a SP |
1397 | COND_SIGNAL(&ul->lock.cond); |
1398 | COND_WAIT(user_condition, &ul->lock.mutex); | |
ba2940ce | 1399 | while (ul->lock.owner != NULL) { |
7473853a SP |
1400 | /* OK -- must reacquire the lock */ |
1401 | COND_WAIT(&ul->lock.cond, &ul->lock.mutex); | |
1402 | } | |
1403 | ul->lock.owner = aTHX; | |
1404 | ul->lock.locks = locks; | |
1405 | MUTEX_UNLOCK(&ul->lock.mutex); | |
1406 | ||
a0e036c1 MP |
1407 | |
1408 | int | |
7473853a SP |
1409 | cond_timedwait(SV *ref_cond, double abs, SV *ref_lock = 0) |
1410 | PROTOTYPE: \[$@%]$;\[$@%] | |
1411 | PREINIT: | |
1412 | SV *ssv; | |
1413 | perl_cond* user_condition; | |
1414 | int locks; | |
1415 | user_lock *ul; | |
1416 | CODE: | |
1417 | if (! SvROK(ref_cond)) | |
1418 | Perl_croak(aTHX_ "Argument to cond_timedwait needs to be passed as ref"); | |
1419 | ref_cond = SvRV(ref_cond); | |
1420 | if (SvROK(ref_cond)) | |
1421 | ref_cond = SvRV(ref_cond); | |
1422 | ssv = Perl_sharedsv_find(aTHX_ ref_cond); | |
1423 | if (! ssv) | |
1424 | Perl_croak(aTHX_ "cond_timedwait can only be used on shared values"); | |
1425 | ul = S_get_userlock(aTHX_ ssv, 1); | |
1426 | ||
1427 | user_condition = &ul->user_cond; | |
1428 | if (ref_lock && (ref_cond != ref_lock)) { | |
1429 | if (! SvROK(ref_lock)) | |
1430 | Perl_croak(aTHX_ "cond_timedwait lock needs to be passed as ref"); | |
1431 | ref_lock = SvRV(ref_lock); | |
1432 | if (SvROK(ref_lock)) ref_lock = SvRV(ref_lock); | |
1433 | ssv = Perl_sharedsv_find(aTHX_ ref_lock); | |
1434 | if (! ssv) | |
1435 | Perl_croak(aTHX_ "cond_timedwait lock must be a shared value"); | |
1436 | ul = S_get_userlock(aTHX_ ssv, 1); | |
1437 | } | |
1438 | if (ul->lock.owner != aTHX) | |
1439 | Perl_croak(aTHX_ "You need a lock before you can cond_wait"); | |
1440 | ||
1441 | MUTEX_LOCK(&ul->lock.mutex); | |
1442 | ul->lock.owner = NULL; | |
1443 | locks = ul->lock.locks; | |
1444 | ul->lock.locks = 0; | |
ba2940ce JH |
1445 | /* Since we are releasing the lock here, we need to tell other |
1446 | * people that it is ok to go ahead and use it */ | |
7473853a SP |
1447 | COND_SIGNAL(&ul->lock.cond); |
1448 | RETVAL = Perl_sharedsv_cond_timedwait(user_condition, &ul->lock.mutex, abs); | |
1449 | while (ul->lock.owner != NULL) { | |
1450 | /* OK -- must reacquire the lock... */ | |
1451 | COND_WAIT(&ul->lock.cond, &ul->lock.mutex); | |
1452 | } | |
1453 | ul->lock.owner = aTHX; | |
1454 | ul->lock.locks = locks; | |
1455 | MUTEX_UNLOCK(&ul->lock.mutex); | |
1456 | ||
1457 | if (RETVAL == 0) | |
a0e036c1 | 1458 | XSRETURN_UNDEF; |
7473853a SP |
1459 | OUTPUT: |
1460 | RETVAL | |
a0e036c1 | 1461 | |
29ecdb6f | 1462 | |
7473853a | 1463 | void |
39ec4146 | 1464 | cond_signal(SV *myref) |
7473853a SP |
1465 | PROTOTYPE: \[$@%] |
1466 | PREINIT: | |
1467 | SV *ssv; | |
1468 | user_lock *ul; | |
1469 | CODE: | |
39ec4146 | 1470 | if (! SvROK(myref)) |
56fcff86 | 1471 | Perl_croak(aTHX_ "Argument to cond_signal needs to be passed as ref"); |
39ec4146 RGS |
1472 | myref = SvRV(myref); |
1473 | if (SvROK(myref)) | |
1474 | myref = SvRV(myref); | |
1475 | ssv = Perl_sharedsv_find(aTHX_ myref); | |
7473853a SP |
1476 | if (! ssv) |
1477 | Perl_croak(aTHX_ "cond_signal can only be used on shared values"); | |
1478 | ul = S_get_userlock(aTHX_ ssv, 1); | |
1479 | if (ckWARN(WARN_THREADS) && ul->lock.owner != aTHX) { | |
1480 | Perl_warner(aTHX_ packWARN(WARN_THREADS), | |
1481 | "cond_signal() called on unlocked variable"); | |
1482 | } | |
1483 | COND_SIGNAL(&ul->user_cond); | |
6f942b98 | 1484 | |
29ecdb6f | 1485 | |
7473853a | 1486 | void |
39ec4146 | 1487 | cond_broadcast(SV *myref) |
7473853a SP |
1488 | PROTOTYPE: \[$@%] |
1489 | PREINIT: | |
1490 | SV *ssv; | |
1491 | user_lock *ul; | |
1492 | CODE: | |
39ec4146 | 1493 | if (! SvROK(myref)) |
56fcff86 | 1494 | Perl_croak(aTHX_ "Argument to cond_broadcast needs to be passed as ref"); |
39ec4146 RGS |
1495 | myref = SvRV(myref); |
1496 | if (SvROK(myref)) | |
1497 | myref = SvRV(myref); | |
1498 | ssv = Perl_sharedsv_find(aTHX_ myref); | |
7473853a SP |
1499 | if (! ssv) |
1500 | Perl_croak(aTHX_ "cond_broadcast can only be used on shared values"); | |
1501 | ul = S_get_userlock(aTHX_ ssv, 1); | |
1502 | if (ckWARN(WARN_THREADS) && ul->lock.owner != aTHX) { | |
1503 | Perl_warner(aTHX_ packWARN(WARN_THREADS), | |
1504 | "cond_broadcast() called on unlocked variable"); | |
1505 | } | |
1506 | COND_BROADCAST(&ul->user_cond); | |
1507 | ||
1508 | ||
1509 | void | |
39ec4146 | 1510 | bless(SV* myref, ...); |
7473853a SP |
1511 | PROTOTYPE: $;$ |
1512 | PREINIT: | |
1513 | HV* stash; | |
1514 | SV *ssv; | |
1515 | CODE: | |
1516 | if (items == 1) { | |
1517 | stash = CopSTASH(PL_curcop); | |
1518 | } else { | |
1519 | SV* classname = ST(1); | |
1520 | STRLEN len; | |
1521 | char *ptr; | |
1522 | ||
1523 | if (classname && | |
1524 | ! SvGMAGICAL(classname) && | |
1525 | ! SvAMAGIC(classname) && | |
1526 | SvROK(classname)) | |
1527 | { | |
1528 | Perl_croak(aTHX_ "Attempt to bless into a reference"); | |
1529 | } | |
1530 | ptr = SvPV(classname, len); | |
1531 | if (ckWARN(WARN_MISC) && len == 0) { | |
1532 | Perl_warner(aTHX_ packWARN(WARN_MISC), | |
1533 | "Explicit blessing to '' (assuming package main)"); | |
1534 | } | |
1535 | stash = gv_stashpvn(ptr, len, TRUE); | |
1536 | } | |
39ec4146 RGS |
1537 | SvREFCNT_inc_void(myref); |
1538 | (void)sv_bless(myref, stash); | |
1539 | ST(0) = sv_2mortal(myref); | |
1540 | ssv = Perl_sharedsv_find(aTHX_ myref); | |
7473853a SP |
1541 | if (ssv) { |
1542 | dTHXc; | |
1543 | ENTER_LOCK; | |
1544 | SHARED_CONTEXT; | |
1545 | { | |
1546 | SV* fake_stash = newSVpv(HvNAME_get(stash), 0); | |
1547 | (void)sv_bless(ssv, (HV*)fake_stash); | |
1548 | } | |
1549 | CALLER_CONTEXT; | |
1550 | LEAVE_LOCK; | |
1551 | } | |
1552 | /* XSRETURN(1); - implied */ | |
5c360ac5 | 1553 | |
73e09c8f JH |
1554 | #endif /* USE_ITHREADS */ |
1555 | ||
68795e93 NIS |
1556 | BOOT: |
1557 | { | |
73e09c8f | 1558 | #ifdef USE_ITHREADS |
68795e93 | 1559 | Perl_sharedsv_init(aTHX); |
73e09c8f | 1560 | #endif /* USE_ITHREADS */ |
68795e93 | 1561 | } |