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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); \ |
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11 | Perl_croak(aTHX_ "panic: DETACH"); \ |
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12 | } \ |
13 | } STMT_END |
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14 | # define THR getTHR() |
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15 | struct perl_thread *getTHR (void); |
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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 | #ifndef PTHREAD_CREATE_JOINABLE |
54 | # ifdef OLD_PTHREAD_CREATE_JOINABLE |
55 | # define PTHREAD_CREATE_JOINABLE OLD_PTHREAD_CREATE_JOINABLE |
56 | # else |
57 | # define PTHREAD_CREATE_JOINABLE 0 /* Panic? No, guess. */ |
58 | # endif |
59 | #endif |
60 | |
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61 | #ifdef I_MACH_CTHREADS |
62 | |
63 | /* cthreads interface */ |
64 | |
65 | /* #include <mach/cthreads.h> is in perl.h #ifdef I_MACH_CTHREADS */ |
66 | |
67 | #define MUTEX_INIT(m) \ |
68 | STMT_START { \ |
69 | *m = mutex_alloc(); \ |
70 | if (*m) { \ |
71 | mutex_init(*m); \ |
72 | } else { \ |
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73 | Perl_croak(aTHX_ "panic: MUTEX_INIT"); \ |
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74 | } \ |
75 | } STMT_END |
76 | |
77 | #define MUTEX_LOCK(m) mutex_lock(*m) |
78 | #define MUTEX_UNLOCK(m) mutex_unlock(*m) |
79 | #define MUTEX_DESTROY(m) \ |
80 | STMT_START { \ |
81 | mutex_free(*m); \ |
82 | *m = 0; \ |
83 | } STMT_END |
84 | |
85 | #define COND_INIT(c) \ |
86 | STMT_START { \ |
87 | *c = condition_alloc(); \ |
88 | if (*c) { \ |
89 | condition_init(*c); \ |
90 | } else { \ |
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91 | Perl_croak(aTHX_ "panic: COND_INIT"); \ |
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92 | } \ |
93 | } STMT_END |
94 | |
95 | #define COND_SIGNAL(c) condition_signal(*c) |
96 | #define COND_BROADCAST(c) condition_broadcast(*c) |
97 | #define COND_WAIT(c, m) condition_wait(*c, *m) |
98 | #define COND_DESTROY(c) \ |
99 | STMT_START { \ |
100 | condition_free(*c); \ |
101 | *c = 0; \ |
102 | } STMT_END |
103 | |
104 | #define THREAD_CREATE(thr, f) (thr->self = cthread_fork(f, thr), 0) |
105 | #define THREAD_POST_CREATE(thr) |
106 | |
107 | #define THREAD_RET_TYPE any_t |
108 | #define THREAD_RET_CAST(x) ((any_t) x) |
109 | |
110 | #define DETACH(t) cthread_detach(t->self) |
111 | #define JOIN(t, avp) (*(avp) = (AV *)cthread_join(t->self)) |
112 | |
113 | #define SET_THR(thr) cthread_set_data(cthread_self(), thr) |
114 | #define THR cthread_data(cthread_self()) |
115 | |
116 | #define INIT_THREADS cthread_init() |
117 | #define YIELD cthread_yield() |
118 | #define ALLOC_THREAD_KEY |
119 | #define SET_THREAD_SELF(thr) (thr->self = cthread_self()) |
120 | |
121 | #endif /* I_MACH_CTHREADS */ |
122 | |
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123 | #ifndef YIELD |
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124 | # ifdef SCHED_YIELD |
125 | # define YIELD SCHED_YIELD |
126 | # else |
127 | # ifdef HAS_SCHED_YIELD |
128 | # define YIELD sched_yield() |
129 | # else |
130 | # ifdef HAS_PTHREAD_YIELD |
131 | /* pthread_yield(NULL) platforms are expected |
132 | * to have #defined YIELD for themselves. */ |
133 | # define YIELD pthread_yield() |
134 | # endif |
135 | # endif |
136 | # endif |
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137 | #endif |
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138 | |
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139 | #ifdef __hpux |
140 | # define MUTEX_INIT_NEEDS_MUTEX_ZEROED |
141 | #endif |
142 | |
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143 | #ifndef MUTEX_INIT |
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144 | #ifdef MUTEX_INIT_NEEDS_MUTEX_ZEROED |
145 | /* Temporary workaround, true bug is deeper. --jhi 1999-02-25 */ |
146 | #define MUTEX_INIT(m) \ |
147 | STMT_START { \ |
148 | Zero((m), 1, perl_mutex); \ |
149 | if (pthread_mutex_init((m), pthread_mutexattr_default)) \ |
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150 | Perl_croak(aTHX_ "panic: MUTEX_INIT"); \ |
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151 | } STMT_END |
152 | #else |
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153 | #define MUTEX_INIT(m) \ |
154 | STMT_START { \ |
155 | if (pthread_mutex_init((m), pthread_mutexattr_default)) \ |
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156 | Perl_croak(aTHX_ "panic: MUTEX_INIT"); \ |
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157 | } STMT_END |
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158 | #endif |
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159 | #define MUTEX_LOCK(m) \ |
160 | STMT_START { \ |
161 | if (pthread_mutex_lock((m))) \ |
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162 | Perl_croak(aTHX_ "panic: MUTEX_LOCK"); \ |
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163 | } STMT_END |
164 | #define MUTEX_UNLOCK(m) \ |
165 | STMT_START { \ |
166 | if (pthread_mutex_unlock((m))) \ |
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167 | Perl_croak(aTHX_ "panic: MUTEX_UNLOCK"); \ |
168 | } STMT_END |
169 | #define MUTEX_LOCK_NOCONTEXT(m) \ |
170 | STMT_START { \ |
171 | if (pthread_mutex_lock((m))) \ |
172 | Perl_croak_nocontext("panic: MUTEX_LOCK"); \ |
173 | } STMT_END |
174 | #define MUTEX_UNLOCK_NOCONTEXT(m) \ |
175 | STMT_START { \ |
176 | if (pthread_mutex_unlock((m))) \ |
177 | Perl_croak_nocontext("panic: MUTEX_UNLOCK");\ |
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178 | } STMT_END |
179 | #define MUTEX_DESTROY(m) \ |
180 | STMT_START { \ |
181 | if (pthread_mutex_destroy((m))) \ |
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182 | Perl_croak(aTHX_ "panic: MUTEX_DESTROY"); \ |
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183 | } STMT_END |
184 | #endif /* MUTEX_INIT */ |
185 | |
186 | #ifndef COND_INIT |
187 | #define COND_INIT(c) \ |
188 | STMT_START { \ |
189 | if (pthread_cond_init((c), pthread_condattr_default)) \ |
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190 | Perl_croak(aTHX_ "panic: COND_INIT"); \ |
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191 | } STMT_END |
192 | #define COND_SIGNAL(c) \ |
193 | STMT_START { \ |
194 | if (pthread_cond_signal((c))) \ |
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195 | Perl_croak(aTHX_ "panic: COND_SIGNAL"); \ |
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196 | } STMT_END |
197 | #define COND_BROADCAST(c) \ |
198 | STMT_START { \ |
199 | if (pthread_cond_broadcast((c))) \ |
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200 | Perl_croak(aTHX_ "panic: COND_BROADCAST"); \ |
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201 | } STMT_END |
202 | #define COND_WAIT(c, m) \ |
203 | STMT_START { \ |
204 | if (pthread_cond_wait((c), (m))) \ |
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205 | Perl_croak(aTHX_ "panic: COND_WAIT"); \ |
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206 | } STMT_END |
207 | #define COND_DESTROY(c) \ |
208 | STMT_START { \ |
209 | if (pthread_cond_destroy((c))) \ |
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210 | Perl_croak(aTHX_ "panic: COND_DESTROY"); \ |
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211 | } STMT_END |
212 | #endif /* COND_INIT */ |
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213 | |
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214 | /* DETACH(t) must only be called while holding t->mutex */ |
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215 | #ifndef DETACH |
216 | #define DETACH(t) \ |
217 | STMT_START { \ |
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218 | if (pthread_detach((t)->self)) { \ |
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219 | MUTEX_UNLOCK(&(t)->mutex); \ |
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220 | Perl_croak(aTHX_ "panic: DETACH"); \ |
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221 | } \ |
222 | } STMT_END |
223 | #endif /* DETACH */ |
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224 | |
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225 | #ifndef JOIN |
226 | #define JOIN(t, avp) \ |
227 | STMT_START { \ |
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228 | if (pthread_join((t)->self, (void**)(avp))) \ |
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229 | Perl_croak(aTHX_ "panic: pthread_join"); \ |
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230 | } STMT_END |
231 | #endif /* JOIN */ |
232 | |
233 | #ifndef SET_THR |
234 | #define SET_THR(t) \ |
235 | STMT_START { \ |
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236 | if (pthread_setspecific(PL_thr_key, (void *) (t))) \ |
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237 | Perl_croak(aTHX_ "panic: pthread_setspecific"); \ |
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238 | } STMT_END |
239 | #endif /* SET_THR */ |
240 | |
241 | #ifndef THR |
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242 | #define THR ((struct perl_thread *) pthread_getspecific(PL_thr_key)) |
243 | #endif |
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244 | |
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245 | /* |
246 | * dTHR is performance-critical. Here, we only do the pthread_get_specific |
247 | * if there may be more than one thread in existence, otherwise we get thr |
248 | * from thrsv which is cached in the per-interpreter structure. |
249 | * Systems with very fast pthread_get_specific (which should be all systems |
250 | * but unfortunately isn't) may wish to simplify to "...*thr = THR". |
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251 | * |
252 | * The use of PL_threadnum should be safe here. |
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253 | */ |
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254 | #ifndef dTHR |
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255 | # define dTHR \ |
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256 | struct perl_thread *thr = PL_threadnum? THR : (struct perl_thread*)SvPVX(PL_thrsv) |
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257 | #endif /* dTHR */ |
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258 | |
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259 | #ifndef INIT_THREADS |
260 | # ifdef NEED_PTHREAD_INIT |
261 | # define INIT_THREADS pthread_init() |
262 | # else |
263 | # define INIT_THREADS NOOP |
264 | # endif |
265 | #endif |
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266 | |
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267 | /* Accessor for per-thread SVs */ |
268 | #define THREADSV(i) (thr->threadsvp[i]) |
269 | |
270 | /* |
271 | * LOCK_SV_MUTEX and UNLOCK_SV_MUTEX are performance-critical. Here, we |
272 | * try only locking them if there may be more than one thread in existence. |
273 | * Systems with very fast mutexes (and/or slow conditionals) may wish to |
274 | * remove the "if (threadnum) ..." test. |
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275 | * XXX do NOT use C<if (PL_threadnum) ...> -- it sets up race conditions! |
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276 | */ |
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277 | #define LOCK_SV_MUTEX \ |
278 | STMT_START { \ |
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279 | MUTEX_LOCK(&PL_sv_mutex); \ |
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280 | } STMT_END |
281 | |
282 | #define UNLOCK_SV_MUTEX \ |
283 | STMT_START { \ |
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284 | MUTEX_UNLOCK(&PL_sv_mutex); \ |
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285 | } STMT_END |
286 | |
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287 | /* Likewise for strtab_mutex */ |
288 | #define LOCK_STRTAB_MUTEX \ |
289 | STMT_START { \ |
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290 | MUTEX_LOCK(&PL_strtab_mutex); \ |
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291 | } STMT_END |
292 | |
293 | #define UNLOCK_STRTAB_MUTEX \ |
294 | STMT_START { \ |
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295 | MUTEX_UNLOCK(&PL_strtab_mutex); \ |
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296 | } STMT_END |
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297 | |
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298 | #ifndef THREAD_RET_TYPE |
299 | # define THREAD_RET_TYPE void * |
300 | # define THREAD_RET_CAST(p) ((void *)(p)) |
301 | #endif /* THREAD_RET */ |
302 | |
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303 | |
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304 | /* Values and macros for thr->flags */ |
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305 | #define THRf_STATE_MASK 7 |
306 | #define THRf_R_JOINABLE 0 |
307 | #define THRf_R_JOINED 1 |
308 | #define THRf_R_DETACHED 2 |
309 | #define THRf_ZOMBIE 3 |
310 | #define THRf_DEAD 4 |
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311 | |
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312 | #define THRf_DID_DIE 8 |
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313 | |
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314 | /* ThrSTATE(t) and ThrSETSTATE(t) must only be called while holding t->mutex */ |
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315 | #define ThrSTATE(t) ((t)->flags & THRf_STATE_MASK) |
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316 | #define ThrSETSTATE(t, s) STMT_START { \ |
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317 | (t)->flags &= ~THRf_STATE_MASK; \ |
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318 | (t)->flags |= (s); \ |
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319 | DEBUG_S(PerlIO_printf(PerlIO_stderr(), \ |
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320 | "thread %p set to state %d\n", (t), (s))); \ |
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321 | } STMT_END |
322 | |
323 | typedef struct condpair { |
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324 | perl_mutex mutex; /* Protects all other fields */ |
325 | perl_cond owner_cond; /* For when owner changes at all */ |
326 | perl_cond cond; /* For cond_signal and cond_broadcast */ |
327 | Thread owner; /* Currently owning thread */ |
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328 | } condpair_t; |
329 | |
330 | #define MgMUTEXP(mg) (&((condpair_t *)(mg->mg_ptr))->mutex) |
331 | #define MgOWNERCONDP(mg) (&((condpair_t *)(mg->mg_ptr))->owner_cond) |
332 | #define MgCONDP(mg) (&((condpair_t *)(mg->mg_ptr))->cond) |
333 | #define MgOWNER(mg) ((condpair_t *)(mg->mg_ptr))->owner |
334 | |
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335 | #else |
336 | /* USE_THREADS is not defined */ |
337 | #define MUTEX_LOCK(m) |
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338 | #define MUTEX_LOCK_NOCONTEXT(m) |
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339 | #define MUTEX_UNLOCK(m) |
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340 | #define MUTEX_UNLOCK_NOCONTEXT(m) |
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341 | #define MUTEX_INIT(m) |
342 | #define MUTEX_DESTROY(m) |
343 | #define COND_INIT(c) |
344 | #define COND_SIGNAL(c) |
345 | #define COND_BROADCAST(c) |
346 | #define COND_WAIT(c, m) |
347 | #define COND_DESTROY(c) |
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348 | #define LOCK_SV_MUTEX |
349 | #define UNLOCK_SV_MUTEX |
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350 | #define LOCK_STRTAB_MUTEX |
351 | #define UNLOCK_STRTAB_MUTEX |
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352 | |
353 | #define THR |
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354 | #define dTHR dNOOP |
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355 | #endif /* USE_THREADS */ |