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