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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 | # if defined(OLD_PTHREADS_API) && !defined(DJGPP) |
7 | /* POSIXish threads */ |
8 | # define pthread_mutexattr_init(a) pthread_mutexattr_create(a) |
9 | # define pthread_mutexattr_settype(a,t) pthread_mutexattr_setkind_np(a,t) |
10 | # define pthread_key_create(k,d) pthread_keycreate(k,(pthread_destructor_t)(d)) |
11 | # define DETACH(t) \ |
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12 | STMT_START { \ |
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13 | if (pthread_detach(&(t)->self)) { \ |
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14 | MUTEX_UNLOCK(&(t)->mutex); \ |
15 | croak("panic: DETACH"); \ |
16 | } \ |
17 | } STMT_END |
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18 | # else |
19 | # define pthread_mutexattr_default NULL |
20 | # define pthread_condattr_default NULL |
21 | # endif /* OLD_PTHREADS_API */ |
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22 | #endif |
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23 | |
24 | #ifndef YIELD |
25 | # define YIELD SCHED_YIELD |
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26 | #endif |
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27 | |
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28 | #ifdef PTHREAD_CREATE_JOINABLE |
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29 | # define ATTR_JOINABLE PTHREAD_CREATE_JOINABLE |
30 | #else |
31 | # ifdef PTHREAD_CREATE_UNDETACHED |
32 | # define ATTR_JOINABLE PTHREAD_CREATE_UNDETACHED |
33 | # else |
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34 | # ifdef __UNDETACHED |
35 | # define ATTR_JOINABLE __UNDETACHED |
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36 | # endif |
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37 | # endif |
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38 | #endif |
39 | |
40 | #ifndef MUTEX_INIT |
41 | #define MUTEX_INIT(m) \ |
42 | STMT_START { \ |
43 | if (pthread_mutex_init((m), pthread_mutexattr_default)) \ |
44 | croak("panic: MUTEX_INIT"); \ |
45 | } STMT_END |
46 | #define MUTEX_LOCK(m) \ |
47 | STMT_START { \ |
48 | if (pthread_mutex_lock((m))) \ |
49 | croak("panic: MUTEX_LOCK"); \ |
50 | } STMT_END |
51 | #define MUTEX_UNLOCK(m) \ |
52 | STMT_START { \ |
53 | if (pthread_mutex_unlock((m))) \ |
54 | croak("panic: MUTEX_UNLOCK"); \ |
55 | } STMT_END |
56 | #define MUTEX_DESTROY(m) \ |
57 | STMT_START { \ |
58 | if (pthread_mutex_destroy((m))) \ |
59 | croak("panic: MUTEX_DESTROY"); \ |
60 | } STMT_END |
61 | #endif /* MUTEX_INIT */ |
62 | |
63 | #ifndef COND_INIT |
64 | #define COND_INIT(c) \ |
65 | STMT_START { \ |
66 | if (pthread_cond_init((c), pthread_condattr_default)) \ |
67 | croak("panic: COND_INIT"); \ |
68 | } STMT_END |
69 | #define COND_SIGNAL(c) \ |
70 | STMT_START { \ |
71 | if (pthread_cond_signal((c))) \ |
72 | croak("panic: COND_SIGNAL"); \ |
73 | } STMT_END |
74 | #define COND_BROADCAST(c) \ |
75 | STMT_START { \ |
76 | if (pthread_cond_broadcast((c))) \ |
77 | croak("panic: COND_BROADCAST"); \ |
78 | } STMT_END |
79 | #define COND_WAIT(c, m) \ |
80 | STMT_START { \ |
81 | if (pthread_cond_wait((c), (m))) \ |
82 | croak("panic: COND_WAIT"); \ |
83 | } STMT_END |
84 | #define COND_DESTROY(c) \ |
85 | STMT_START { \ |
86 | if (pthread_cond_destroy((c))) \ |
87 | croak("panic: COND_DESTROY"); \ |
88 | } STMT_END |
89 | #endif /* COND_INIT */ |
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90 | |
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91 | /* DETACH(t) must only be called while holding t->mutex */ |
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92 | #ifndef DETACH |
93 | #define DETACH(t) \ |
94 | STMT_START { \ |
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95 | if (pthread_detach((t)->self)) { \ |
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96 | MUTEX_UNLOCK(&(t)->mutex); \ |
97 | croak("panic: DETACH"); \ |
98 | } \ |
99 | } STMT_END |
100 | #endif /* DETACH */ |
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101 | |
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102 | #ifndef JOIN |
103 | #define JOIN(t, avp) \ |
104 | STMT_START { \ |
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105 | if (pthread_join((t)->self, (void**)(avp))) \ |
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106 | croak("panic: pthread_join"); \ |
107 | } STMT_END |
108 | #endif /* JOIN */ |
109 | |
110 | #ifndef SET_THR |
111 | #define SET_THR(t) \ |
112 | STMT_START { \ |
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113 | if (pthread_setspecific(PL_thr_key, (void *) (t))) \ |
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114 | croak("panic: pthread_setspecific"); \ |
115 | } STMT_END |
116 | #endif /* SET_THR */ |
117 | |
118 | #ifndef THR |
119 | # ifdef OLD_PTHREADS_API |
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120 | struct perl_thread *getTHR _((void)); |
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121 | # define THR getTHR() |
122 | # else |
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123 | # define THR ((struct perl_thread *) pthread_getspecific(PL_thr_key)) |
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124 | # endif /* OLD_PTHREADS_API */ |
125 | #endif /* THR */ |
126 | |
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127 | /* |
128 | * dTHR is performance-critical. Here, we only do the pthread_get_specific |
129 | * if there may be more than one thread in existence, otherwise we get thr |
130 | * from thrsv which is cached in the per-interpreter structure. |
131 | * Systems with very fast pthread_get_specific (which should be all systems |
132 | * but unfortunately isn't) may wish to simplify to "...*thr = THR". |
133 | */ |
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134 | #ifndef dTHR |
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135 | # define dTHR \ |
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136 | struct perl_thread *thr = PL_threadnum? THR : (struct perl_thread*)SvPVX(PL_thrsv) |
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137 | #endif /* dTHR */ |
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138 | |
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139 | #ifndef INIT_THREADS |
140 | # ifdef NEED_PTHREAD_INIT |
141 | # define INIT_THREADS pthread_init() |
142 | # else |
143 | # define INIT_THREADS NOOP |
144 | # endif |
145 | #endif |
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146 | |
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147 | /* Accessor for per-thread SVs */ |
148 | #define THREADSV(i) (thr->threadsvp[i]) |
149 | |
150 | /* |
151 | * LOCK_SV_MUTEX and UNLOCK_SV_MUTEX are performance-critical. Here, we |
152 | * try only locking them if there may be more than one thread in existence. |
153 | * Systems with very fast mutexes (and/or slow conditionals) may wish to |
154 | * remove the "if (threadnum) ..." test. |
155 | */ |
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156 | #define LOCK_SV_MUTEX \ |
157 | STMT_START { \ |
158 | if (PL_threadnum) \ |
159 | MUTEX_LOCK(&PL_sv_mutex); \ |
160 | } STMT_END |
161 | |
162 | #define UNLOCK_SV_MUTEX \ |
163 | STMT_START { \ |
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164 | if (PL_threadnum) \ |
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165 | MUTEX_UNLOCK(&PL_sv_mutex); \ |
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166 | } STMT_END |
167 | |
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168 | /* Likewise for strtab_mutex */ |
169 | #define LOCK_STRTAB_MUTEX \ |
170 | STMT_START { \ |
171 | if (PL_threadnum) \ |
172 | MUTEX_LOCK(&PL_strtab_mutex); \ |
173 | } STMT_END |
174 | |
175 | #define UNLOCK_STRTAB_MUTEX \ |
176 | STMT_START { \ |
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177 | if (PL_threadnum) \ |
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178 | MUTEX_UNLOCK(&PL_strtab_mutex); \ |
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179 | } STMT_END |
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180 | |
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181 | #ifndef THREAD_RET_TYPE |
182 | # define THREAD_RET_TYPE void * |
183 | # define THREAD_RET_CAST(p) ((void *)(p)) |
184 | #endif /* THREAD_RET */ |
185 | |
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186 | |
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187 | /* Values and macros for thr->flags */ |
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188 | #define THRf_STATE_MASK 7 |
189 | #define THRf_R_JOINABLE 0 |
190 | #define THRf_R_JOINED 1 |
191 | #define THRf_R_DETACHED 2 |
192 | #define THRf_ZOMBIE 3 |
193 | #define THRf_DEAD 4 |
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194 | |
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195 | #define THRf_DID_DIE 8 |
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196 | |
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197 | /* ThrSTATE(t) and ThrSETSTATE(t) must only be called while holding t->mutex */ |
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198 | #define ThrSTATE(t) ((t)->flags & THRf_STATE_MASK) |
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199 | #define ThrSETSTATE(t, s) STMT_START { \ |
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200 | (t)->flags &= ~THRf_STATE_MASK; \ |
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201 | (t)->flags |= (s); \ |
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202 | DEBUG_S(PerlIO_printf(PerlIO_stderr(), \ |
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203 | "thread %p set to state %d\n", (t), (s))); \ |
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204 | } STMT_END |
205 | |
206 | typedef struct condpair { |
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207 | perl_mutex mutex; /* Protects all other fields */ |
208 | perl_cond owner_cond; /* For when owner changes at all */ |
209 | perl_cond cond; /* For cond_signal and cond_broadcast */ |
210 | Thread owner; /* Currently owning thread */ |
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211 | } condpair_t; |
212 | |
213 | #define MgMUTEXP(mg) (&((condpair_t *)(mg->mg_ptr))->mutex) |
214 | #define MgOWNERCONDP(mg) (&((condpair_t *)(mg->mg_ptr))->owner_cond) |
215 | #define MgCONDP(mg) (&((condpair_t *)(mg->mg_ptr))->cond) |
216 | #define MgOWNER(mg) ((condpair_t *)(mg->mg_ptr))->owner |
217 | |
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218 | #else |
219 | /* USE_THREADS is not defined */ |
220 | #define MUTEX_LOCK(m) |
221 | #define MUTEX_UNLOCK(m) |
222 | #define MUTEX_INIT(m) |
223 | #define MUTEX_DESTROY(m) |
224 | #define COND_INIT(c) |
225 | #define COND_SIGNAL(c) |
226 | #define COND_BROADCAST(c) |
227 | #define COND_WAIT(c, m) |
228 | #define COND_DESTROY(c) |
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229 | #define LOCK_SV_MUTEX |
230 | #define UNLOCK_SV_MUTEX |
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231 | #define LOCK_STRTAB_MUTEX |
232 | #define UNLOCK_STRTAB_MUTEX |
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233 | |
234 | #define THR |
235 | /* Rats: if dTHR is just blank then the subsequent ";" throws an error */ |
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236 | #ifdef WIN32 |
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237 | #define dTHR extern int Perl___notused |
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238 | #else |
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239 | #define dTHR extern int errno |
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240 | #endif |
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241 | #endif /* USE_THREADS */ |