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