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1 | #ifdef USE_THREADS |
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2 | |
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3 | #ifdef WIN32 |
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4 | # include <win32thread.h> |
5 | #else |
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6 | # ifdef OLD_PTHREADS_API /* Here be dragons. */ |
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7 | # define DETACH(t) \ |
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8 | STMT_START { \ |
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9 | if (pthread_detach(&(t)->self)) { \ |
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10 | MUTEX_UNLOCK(&(t)->mutex); \ |
11 | croak("panic: DETACH"); \ |
12 | } \ |
13 | } STMT_END |
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14 | # define THR getTHR() |
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15 | struct perl_thread *getTHR _((void)); |
16 | # define PTHREAD_GETSPECIFIC_INT |
17 | # ifdef DJGPP |
18 | # define pthread_addr_t any_t |
19 | # define NEED_PTHREAD_INIT |
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20 | # define PTHREAD_CREATE_JOINABLE (1) |
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21 | # endif |
22 | # ifdef __OPEN_VM |
23 | # define pthread_addr_t void * |
24 | # endif |
25 | # ifdef VMS |
26 | # define pthread_attr_init(a) pthread_attr_create(a) |
27 | # define PTHREAD_ATTR_SETDETACHSTATE(a,s) pthread_setdetach_np(a,s) |
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28 | # define PTHREAD_CREATE(t,a,s,d) pthread_create(t,a,s,d) |
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29 | # define pthread_key_create(k,d) pthread_keycreate(k,(pthread_destructor_t)(d)) |
30 | # define pthread_mutexattr_init(a) pthread_mutexattr_create(a) |
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31 | # define pthread_mutexattr_settype(a,t) pthread_mutexattr_setkind_np(a,t) |
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32 | # endif |
33 | # if defined(DJGPP) || defined(__OPEN_VM) |
34 | # define PTHREAD_ATTR_SETDETACHSTATE(a,s) pthread_attr_setdetachstate(a,&(s)) |
35 | # define YIELD pthread_yield(NULL) |
36 | # endif |
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37 | # endif |
38 | # ifndef VMS |
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39 | # define pthread_mutexattr_default NULL |
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40 | # define pthread_condattr_default NULL |
41 | # endif |
42 | #endif |
43 | |
44 | #ifndef PTHREAD_CREATE |
45 | /* You are not supposed to pass NULL as the 2nd arg of PTHREAD_CREATE(). */ |
46 | # define PTHREAD_CREATE(t,a,s,d) pthread_create(t,&(a),s,d) |
47 | #endif |
48 | |
49 | #ifndef PTHREAD_ATTR_SETDETACHSTATE |
50 | # define PTHREAD_ATTR_SETDETACHSTATE(a,s) pthread_attr_setdetachstate(a,s) |
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51 | #endif |
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52 | |
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53 | #ifdef I_MACH_CTHREADS |
54 | |
55 | /* cthreads interface */ |
56 | |
57 | /* #include <mach/cthreads.h> is in perl.h #ifdef I_MACH_CTHREADS */ |
58 | |
59 | #define MUTEX_INIT(m) \ |
60 | STMT_START { \ |
61 | *m = mutex_alloc(); \ |
62 | if (*m) { \ |
63 | mutex_init(*m); \ |
64 | } else { \ |
65 | croak("panic: MUTEX_INIT"); \ |
66 | } \ |
67 | } STMT_END |
68 | |
69 | #define MUTEX_LOCK(m) mutex_lock(*m) |
70 | #define MUTEX_UNLOCK(m) mutex_unlock(*m) |
71 | #define MUTEX_DESTROY(m) \ |
72 | STMT_START { \ |
73 | mutex_free(*m); \ |
74 | *m = 0; \ |
75 | } STMT_END |
76 | |
77 | #define COND_INIT(c) \ |
78 | STMT_START { \ |
79 | *c = condition_alloc(); \ |
80 | if (*c) { \ |
81 | condition_init(*c); \ |
82 | } else { \ |
83 | croak("panic: COND_INIT"); \ |
84 | } \ |
85 | } STMT_END |
86 | |
87 | #define COND_SIGNAL(c) condition_signal(*c) |
88 | #define COND_BROADCAST(c) condition_broadcast(*c) |
89 | #define COND_WAIT(c, m) condition_wait(*c, *m) |
90 | #define COND_DESTROY(c) \ |
91 | STMT_START { \ |
92 | condition_free(*c); \ |
93 | *c = 0; \ |
94 | } STMT_END |
95 | |
96 | #define THREAD_CREATE(thr, f) (thr->self = cthread_fork(f, thr), 0) |
97 | #define THREAD_POST_CREATE(thr) |
98 | |
99 | #define THREAD_RET_TYPE any_t |
100 | #define THREAD_RET_CAST(x) ((any_t) x) |
101 | |
102 | #define DETACH(t) cthread_detach(t->self) |
103 | #define JOIN(t, avp) (*(avp) = (AV *)cthread_join(t->self)) |
104 | |
105 | #define SET_THR(thr) cthread_set_data(cthread_self(), thr) |
106 | #define THR cthread_data(cthread_self()) |
107 | |
108 | #define INIT_THREADS cthread_init() |
109 | #define YIELD cthread_yield() |
110 | #define ALLOC_THREAD_KEY |
111 | #define SET_THREAD_SELF(thr) (thr->self = cthread_self()) |
112 | |
113 | #endif /* I_MACH_CTHREADS */ |
114 | |
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115 | #ifndef YIELD |
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116 | # ifdef SCHED_YIELD |
117 | # define YIELD SCHED_YIELD |
118 | # else |
119 | # ifdef HAS_SCHED_YIELD |
120 | # define YIELD sched_yield() |
121 | # else |
122 | # ifdef HAS_PTHREAD_YIELD |
123 | /* pthread_yield(NULL) platforms are expected |
124 | * to have #defined YIELD for themselves. */ |
125 | # define YIELD pthread_yield() |
126 | # endif |
127 | # endif |
128 | # endif |
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129 | #endif |
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130 | |
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131 | #if !defined(ATTR_JOINABLE) && defined(PTHREAD_CREATE_JOINABLE) |
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132 | # define ATTR_JOINABLE PTHREAD_CREATE_JOINABLE |
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133 | #endif |
134 | #if !defined(ATTR_JOINABLE) && defined(PTHREAD_CREATE_UNDETACHED) |
135 | # define ATTR_JOINABLE PTHREAD_CREATE_UNDETACHED |
136 | #endif |
137 | #if !defined(ATTR_JOINABLE) && defined(__UNDETACHED) |
138 | # define ATTR_JOINABLE __UNDETACHED |
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139 | #endif |
140 | |
141 | #ifndef MUTEX_INIT |
142 | #define MUTEX_INIT(m) \ |
143 | STMT_START { \ |
144 | if (pthread_mutex_init((m), pthread_mutexattr_default)) \ |
145 | croak("panic: MUTEX_INIT"); \ |
146 | } STMT_END |
147 | #define MUTEX_LOCK(m) \ |
148 | STMT_START { \ |
149 | if (pthread_mutex_lock((m))) \ |
150 | croak("panic: MUTEX_LOCK"); \ |
151 | } STMT_END |
152 | #define MUTEX_UNLOCK(m) \ |
153 | STMT_START { \ |
154 | if (pthread_mutex_unlock((m))) \ |
155 | croak("panic: MUTEX_UNLOCK"); \ |
156 | } STMT_END |
157 | #define MUTEX_DESTROY(m) \ |
158 | STMT_START { \ |
159 | if (pthread_mutex_destroy((m))) \ |
160 | croak("panic: MUTEX_DESTROY"); \ |
161 | } STMT_END |
162 | #endif /* MUTEX_INIT */ |
163 | |
164 | #ifndef COND_INIT |
165 | #define COND_INIT(c) \ |
166 | STMT_START { \ |
167 | if (pthread_cond_init((c), pthread_condattr_default)) \ |
168 | croak("panic: COND_INIT"); \ |
169 | } STMT_END |
170 | #define COND_SIGNAL(c) \ |
171 | STMT_START { \ |
172 | if (pthread_cond_signal((c))) \ |
173 | croak("panic: COND_SIGNAL"); \ |
174 | } STMT_END |
175 | #define COND_BROADCAST(c) \ |
176 | STMT_START { \ |
177 | if (pthread_cond_broadcast((c))) \ |
178 | croak("panic: COND_BROADCAST"); \ |
179 | } STMT_END |
180 | #define COND_WAIT(c, m) \ |
181 | STMT_START { \ |
182 | if (pthread_cond_wait((c), (m))) \ |
183 | croak("panic: COND_WAIT"); \ |
184 | } STMT_END |
185 | #define COND_DESTROY(c) \ |
186 | STMT_START { \ |
187 | if (pthread_cond_destroy((c))) \ |
188 | croak("panic: COND_DESTROY"); \ |
189 | } STMT_END |
190 | #endif /* COND_INIT */ |
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191 | |
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192 | /* DETACH(t) must only be called while holding t->mutex */ |
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193 | #ifndef DETACH |
194 | #define DETACH(t) \ |
195 | STMT_START { \ |
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196 | if (pthread_detach((t)->self)) { \ |
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197 | MUTEX_UNLOCK(&(t)->mutex); \ |
198 | croak("panic: DETACH"); \ |
199 | } \ |
200 | } STMT_END |
201 | #endif /* DETACH */ |
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202 | |
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203 | #ifndef JOIN |
204 | #define JOIN(t, avp) \ |
205 | STMT_START { \ |
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206 | if (pthread_join((t)->self, (void**)(avp))) \ |
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207 | croak("panic: pthread_join"); \ |
208 | } STMT_END |
209 | #endif /* JOIN */ |
210 | |
211 | #ifndef SET_THR |
212 | #define SET_THR(t) \ |
213 | STMT_START { \ |
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214 | if (pthread_setspecific(PL_thr_key, (void *) (t))) \ |
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215 | croak("panic: pthread_setspecific"); \ |
216 | } STMT_END |
217 | #endif /* SET_THR */ |
218 | |
219 | #ifndef THR |
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220 | #define THR ((struct perl_thread *) pthread_getspecific(PL_thr_key)) |
221 | #endif |
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222 | |
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223 | /* |
224 | * dTHR is performance-critical. Here, we only do the pthread_get_specific |
225 | * if there may be more than one thread in existence, otherwise we get thr |
226 | * from thrsv which is cached in the per-interpreter structure. |
227 | * Systems with very fast pthread_get_specific (which should be all systems |
228 | * but unfortunately isn't) may wish to simplify to "...*thr = THR". |
229 | */ |
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230 | #ifndef dTHR |
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231 | # define dTHR \ |
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232 | struct perl_thread *thr = PL_threadnum? THR : (struct perl_thread*)SvPVX(PL_thrsv) |
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233 | #endif /* dTHR */ |
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234 | |
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235 | #ifndef INIT_THREADS |
236 | # ifdef NEED_PTHREAD_INIT |
237 | # define INIT_THREADS pthread_init() |
238 | # else |
239 | # define INIT_THREADS NOOP |
240 | # endif |
241 | #endif |
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242 | |
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243 | /* Accessor for per-thread SVs */ |
244 | #define THREADSV(i) (thr->threadsvp[i]) |
245 | |
246 | /* |
247 | * LOCK_SV_MUTEX and UNLOCK_SV_MUTEX are performance-critical. Here, we |
248 | * try only locking them if there may be more than one thread in existence. |
249 | * Systems with very fast mutexes (and/or slow conditionals) may wish to |
250 | * remove the "if (threadnum) ..." test. |
251 | */ |
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252 | #define LOCK_SV_MUTEX \ |
253 | STMT_START { \ |
254 | if (PL_threadnum) \ |
255 | MUTEX_LOCK(&PL_sv_mutex); \ |
256 | } STMT_END |
257 | |
258 | #define UNLOCK_SV_MUTEX \ |
259 | STMT_START { \ |
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260 | if (PL_threadnum) \ |
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261 | MUTEX_UNLOCK(&PL_sv_mutex); \ |
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262 | } STMT_END |
263 | |
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264 | /* Likewise for strtab_mutex */ |
265 | #define LOCK_STRTAB_MUTEX \ |
266 | STMT_START { \ |
267 | if (PL_threadnum) \ |
268 | MUTEX_LOCK(&PL_strtab_mutex); \ |
269 | } STMT_END |
270 | |
271 | #define UNLOCK_STRTAB_MUTEX \ |
272 | STMT_START { \ |
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273 | if (PL_threadnum) \ |
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274 | MUTEX_UNLOCK(&PL_strtab_mutex); \ |
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275 | } STMT_END |
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276 | |
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277 | #ifndef THREAD_RET_TYPE |
278 | # define THREAD_RET_TYPE void * |
279 | # define THREAD_RET_CAST(p) ((void *)(p)) |
280 | #endif /* THREAD_RET */ |
281 | |
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282 | |
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283 | /* Values and macros for thr->flags */ |
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284 | #define THRf_STATE_MASK 7 |
285 | #define THRf_R_JOINABLE 0 |
286 | #define THRf_R_JOINED 1 |
287 | #define THRf_R_DETACHED 2 |
288 | #define THRf_ZOMBIE 3 |
289 | #define THRf_DEAD 4 |
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290 | |
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291 | #define THRf_DID_DIE 8 |
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292 | |
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293 | /* ThrSTATE(t) and ThrSETSTATE(t) must only be called while holding t->mutex */ |
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294 | #define ThrSTATE(t) ((t)->flags & THRf_STATE_MASK) |
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295 | #define ThrSETSTATE(t, s) STMT_START { \ |
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296 | (t)->flags &= ~THRf_STATE_MASK; \ |
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297 | (t)->flags |= (s); \ |
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298 | DEBUG_S(PerlIO_printf(PerlIO_stderr(), \ |
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299 | "thread %p set to state %d\n", (t), (s))); \ |
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300 | } STMT_END |
301 | |
302 | typedef struct condpair { |
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303 | perl_mutex mutex; /* Protects all other fields */ |
304 | perl_cond owner_cond; /* For when owner changes at all */ |
305 | perl_cond cond; /* For cond_signal and cond_broadcast */ |
306 | Thread owner; /* Currently owning thread */ |
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307 | } condpair_t; |
308 | |
309 | #define MgMUTEXP(mg) (&((condpair_t *)(mg->mg_ptr))->mutex) |
310 | #define MgOWNERCONDP(mg) (&((condpair_t *)(mg->mg_ptr))->owner_cond) |
311 | #define MgCONDP(mg) (&((condpair_t *)(mg->mg_ptr))->cond) |
312 | #define MgOWNER(mg) ((condpair_t *)(mg->mg_ptr))->owner |
313 | |
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314 | #else |
315 | /* USE_THREADS is not defined */ |
316 | #define MUTEX_LOCK(m) |
317 | #define MUTEX_UNLOCK(m) |
318 | #define MUTEX_INIT(m) |
319 | #define MUTEX_DESTROY(m) |
320 | #define COND_INIT(c) |
321 | #define COND_SIGNAL(c) |
322 | #define COND_BROADCAST(c) |
323 | #define COND_WAIT(c, m) |
324 | #define COND_DESTROY(c) |
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325 | #define LOCK_SV_MUTEX |
326 | #define UNLOCK_SV_MUTEX |
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327 | #define LOCK_STRTAB_MUTEX |
328 | #define UNLOCK_STRTAB_MUTEX |
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329 | |
330 | #define THR |
331 | /* Rats: if dTHR is just blank then the subsequent ";" throws an error */ |
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332 | #ifdef WIN32 |
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333 | #define dTHR extern int Perl___notused |
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334 | #else |
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335 | #define dTHR extern int errno |
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336 | #endif |
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337 | #endif /* USE_THREADS */ |