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perlapi: Remove per-thread section; move to real scns
[perl5.git] / thread.h
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1/* thread.h
2 *
54ca4ee7 3 * Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
1d325971 4 * by Larry Wall and others
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5 *
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
8 *
9 */
10
3db8f154 11#if defined(USE_ITHREADS)
12ca11f6 12
fd8cd3a3
DS
13#if defined(VMS)
14#include <builtins.h>
15#endif
16
ea0efc06 17#ifdef WIN32
d55594ae 18# include <win32thread.h>
c2844c4f 19#elif defined(NETWARE)
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20# include <nw5thread.h>
21#else
0d85d877 22# ifdef OLD_PTHREADS_API /* Here be dragons. */
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23# define DETACH(t) \
24 STMT_START { \
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25 int _eC_; \
26 if ((_eC_ = pthread_detach(&(t)->self))) { \
ba869deb 27 MUTEX_UNLOCK(&(t)->mutex); \
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28 Perl_croak_nocontext("panic: DETACH (%d) [%s:%d]", \
29 _eC_, __FILE__, __LINE__); \
ba869deb 30 } \
ea0efc06 31 } STMT_END
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32
33# define PERL_GET_CONTEXT Perl_get_context()
34# define PERL_SET_CONTEXT(t) Perl_set_context((void*)t)
35
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36# define PTHREAD_GETSPECIFIC_INT
37# ifdef DJGPP
38# define pthread_addr_t any_t
39# define NEED_PTHREAD_INIT
6dc3770d 40# define PTHREAD_CREATE_JOINABLE (1)
0d85d877 41# endif
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42# ifdef OEMVS
43# define pthread_addr_t void *
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44# define pthread_create(t,a,s,d) pthread_create(t,&(a),s,d)
45# define pthread_keycreate pthread_key_create
46# endif
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47# ifdef VMS
48# define pthread_attr_init(a) pthread_attr_create(a)
49# define PTHREAD_ATTR_SETDETACHSTATE(a,s) pthread_setdetach_np(a,s)
6dc3770d 50# define PTHREAD_CREATE(t,a,s,d) pthread_create(t,a,s,d)
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51# define pthread_key_create(k,d) pthread_keycreate(k,(pthread_destructor_t)(d))
52# define pthread_mutexattr_init(a) pthread_mutexattr_create(a)
9bbd4fab 53# define pthread_mutexattr_settype(a,t) pthread_mutexattr_setkind_np(a,t)
0d85d877 54# endif
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55# if defined(__hpux) && defined(__ux_version) && __ux_version <= 1020
56# define pthread_attr_init(a) pthread_attr_create(a)
57 /* XXX pthread_setdetach_np() missing in DCE threads on HP-UX 10.20 */
10617789 58# define PTHREAD_ATTR_SETDETACHSTATE(a,s) (0)
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59# define PTHREAD_CREATE(t,a,s,d) pthread_create(t,a,s,d)
60# define pthread_key_create(k,d) pthread_keycreate(k,(pthread_destructor_t)(d))
61# define pthread_mutexattr_init(a) pthread_mutexattr_create(a)
62# define pthread_mutexattr_settype(a,t) pthread_mutexattr_setkind_np(a,t)
63# endif
043fec90 64# if defined(DJGPP) || defined(OEMVS)
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65# define PTHREAD_ATTR_SETDETACHSTATE(a,s) pthread_attr_setdetachstate(a,&(s))
66# define YIELD pthread_yield(NULL)
67# endif
0d85d877 68# endif
2eb25c99 69# if !defined(__hpux) || !defined(__ux_version) || __ux_version > 1020
1cfa4ec7 70# define pthread_mutexattr_default NULL
0d85d877 71# define pthread_condattr_default NULL
2eb25c99 72# endif
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73#endif
74
75#ifndef PTHREAD_CREATE
76/* You are not supposed to pass NULL as the 2nd arg of PTHREAD_CREATE(). */
77# define PTHREAD_CREATE(t,a,s,d) pthread_create(t,&(a),s,d)
78#endif
79
80#ifndef PTHREAD_ATTR_SETDETACHSTATE
81# define PTHREAD_ATTR_SETDETACHSTATE(a,s) pthread_attr_setdetachstate(a,s)
d55594ae 82#endif
1cfa4ec7 83
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84#ifndef PTHREAD_CREATE_JOINABLE
85# ifdef OLD_PTHREAD_CREATE_JOINABLE
86# define PTHREAD_CREATE_JOINABLE OLD_PTHREAD_CREATE_JOINABLE
87# else
88# define PTHREAD_CREATE_JOINABLE 0 /* Panic? No, guess. */
89# endif
90#endif
91
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92#ifdef __VMS
93 /* Default is 1024 on VAX, 8192 otherwise */
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94# ifdef __ia64
95# define THREAD_CREATE_NEEDS_STACK (48*1024)
96# else
97# define THREAD_CREATE_NEEDS_STACK (32*1024)
98# endif
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99#endif
100
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101#ifdef I_MACH_CTHREADS
102
103/* cthreads interface */
104
105/* #include <mach/cthreads.h> is in perl.h #ifdef I_MACH_CTHREADS */
106
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107#define MUTEX_INIT(m) \
108 STMT_START { \
109 *m = mutex_alloc(); \
110 if (*m) { \
111 mutex_init(*m); \
112 } else { \
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113 Perl_croak_nocontext("panic: MUTEX_INIT [%s:%d]", \
114 __FILE__, __LINE__); \
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115 } \
116 } STMT_END
117
118#define MUTEX_LOCK(m) mutex_lock(*m)
ba869deb 119#define MUTEX_UNLOCK(m) mutex_unlock(*m)
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120#define MUTEX_DESTROY(m) \
121 STMT_START { \
122 mutex_free(*m); \
123 *m = 0; \
124 } STMT_END
125
126#define COND_INIT(c) \
127 STMT_START { \
128 *c = condition_alloc(); \
129 if (*c) { \
130 condition_init(*c); \
131 } \
132 else { \
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133 Perl_croak_nocontext("panic: COND_INIT [%s:%d]", \
134 __FILE__, __LINE__); \
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135 } \
136 } STMT_END
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137
138#define COND_SIGNAL(c) condition_signal(*c)
139#define COND_BROADCAST(c) condition_broadcast(*c)
140#define COND_WAIT(c, m) condition_wait(*c, *m)
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141#define COND_DESTROY(c) \
142 STMT_START { \
143 condition_free(*c); \
144 *c = 0; \
145 } STMT_END
7f3d1cf1 146
7f3d1cf1 147#define THREAD_RET_TYPE any_t
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148
149#define DETACH(t) cthread_detach(t->self)
a062e10d 150#define JOIN(t, avp) (*(avp) = MUTABLE_AV(cthread_join(t->self)))
7f3d1cf1 151
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152#define PERL_SET_CONTEXT(t) cthread_set_data(cthread_self(), t)
153#define PERL_GET_CONTEXT cthread_data(cthread_self())
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154
155#define INIT_THREADS cthread_init()
156#define YIELD cthread_yield()
ba869deb 157#define ALLOC_THREAD_KEY NOOP
e1b5da64 158#define FREE_THREAD_KEY NOOP
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159#define SET_THREAD_SELF(thr) (thr->self = cthread_self())
160
161#endif /* I_MACH_CTHREADS */
162
1cfa4ec7 163#ifndef YIELD
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164# ifdef SCHED_YIELD
165# define YIELD SCHED_YIELD
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166# elif defined(HAS_SCHED_YIELD)
167# define YIELD sched_yield()
168# elif defined(HAS_PTHREAD_YIELD)
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169 /* pthread_yield(NULL) platforms are expected
170 * to have #defined YIELD for themselves. */
c2844c4f 171# define YIELD pthread_yield()
e7a4f449 172# endif
9731c6ca 173#endif
11343788 174
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175#ifdef __hpux
176# define MUTEX_INIT_NEEDS_MUTEX_ZEROED
177#endif
178
ea0efc06 179#ifndef MUTEX_INIT
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180
181# ifdef MUTEX_INIT_NEEDS_MUTEX_ZEROED
227c31c3 182 /* Temporary workaround, true bug is deeper. --jhi 1999-02-25 */
ba869deb 183# define MUTEX_INIT(m) \
227c31c3 184 STMT_START { \
28a80024 185 int _eC_; \
227c31c3 186 Zero((m), 1, perl_mutex); \
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187 if ((_eC_ = pthread_mutex_init((m), pthread_mutexattr_default))) \
188 Perl_croak_nocontext("panic: MUTEX_INIT (%d) [%s:%d]", \
189 _eC_, __FILE__, __LINE__); \
227c31c3 190 } STMT_END
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191# else
192# define MUTEX_INIT(m) \
ea0efc06 193 STMT_START { \
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194 int _eC_; \
195 if ((_eC_ = pthread_mutex_init((m), pthread_mutexattr_default))) \
196 Perl_croak_nocontext("panic: MUTEX_INIT (%d) [%s:%d]", \
197 _eC_, __FILE__, __LINE__); \
ea0efc06 198 } STMT_END
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199# endif
200
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201# ifdef PERL_TSA_ACTIVE
202# define perl_pthread_mutex_lock(m) perl_tsa_mutex_lock(m)
203# define perl_pthread_mutex_unlock(m) perl_tsa_mutex_unlock(m)
204# else
205# define perl_pthread_mutex_lock(m) pthread_mutex_lock(m)
206# define perl_pthread_mutex_unlock(m) pthread_mutex_unlock(m)
207# endif
208
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209# define MUTEX_LOCK(m) \
210 STMT_START { \
28a80024 211 int _eC_; \
3baee7cc 212 if ((_eC_ = perl_pthread_mutex_lock((m)))) \
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213 Perl_croak_nocontext("panic: MUTEX_LOCK (%d) [%s:%d]", \
214 _eC_, __FILE__, __LINE__); \
cea2e8a9 215 } STMT_END
ba869deb 216
efc57feb 217# define MUTEX_UNLOCK(m) \
ba869deb 218 STMT_START { \
28a80024 219 int _eC_; \
3baee7cc 220 if ((_eC_ = perl_pthread_mutex_unlock((m)))) \
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221 Perl_croak_nocontext("panic: MUTEX_UNLOCK (%d) [%s:%d]", \
222 _eC_, __FILE__, __LINE__); \
ea0efc06 223 } STMT_END
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224
225# define MUTEX_DESTROY(m) \
226 STMT_START { \
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227 int _eC_; \
228 if ((_eC_ = pthread_mutex_destroy((m)))) \
229 Perl_croak_nocontext("panic: MUTEX_DESTROY (%d) [%s:%d]", \
230 _eC_, __FILE__, __LINE__); \
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231 } STMT_END
232#endif /* MUTEX_INIT */
233
234#ifndef COND_INIT
ba869deb 235# define COND_INIT(c) \
ea0efc06 236 STMT_START { \
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237 int _eC_; \
238 if ((_eC_ = pthread_cond_init((c), pthread_condattr_default))) \
239 Perl_croak_nocontext("panic: COND_INIT (%d) [%s:%d]", \
240 _eC_, __FILE__, __LINE__); \
ea0efc06 241 } STMT_END
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242
243# define COND_SIGNAL(c) \
244 STMT_START { \
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245 int _eC_; \
246 if ((_eC_ = pthread_cond_signal((c)))) \
247 Perl_croak_nocontext("panic: COND_SIGNAL (%d) [%s:%d]", \
248 _eC_, __FILE__, __LINE__); \
ea0efc06 249 } STMT_END
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250
251# define COND_BROADCAST(c) \
252 STMT_START { \
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253 int _eC_; \
254 if ((_eC_ = pthread_cond_broadcast((c)))) \
255 Perl_croak_nocontext("panic: COND_BROADCAST (%d) [%s:%d]", \
256 _eC_, __FILE__, __LINE__); \
ea0efc06 257 } STMT_END
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258
259# define COND_WAIT(c, m) \
260 STMT_START { \
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261 int _eC_; \
262 if ((_eC_ = pthread_cond_wait((c), (m)))) \
263 Perl_croak_nocontext("panic: COND_WAIT (%d) [%s:%d]", \
264 _eC_, __FILE__, __LINE__); \
ea0efc06 265 } STMT_END
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266
267# define COND_DESTROY(c) \
268 STMT_START { \
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269 int _eC_; \
270 if ((_eC_ = pthread_cond_destroy((c)))) \
271 Perl_croak_nocontext("panic: COND_DESTROY (%d) [%s:%d]", \
272 _eC_, __FILE__, __LINE__); \
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273 } STMT_END
274#endif /* COND_INIT */
33f46ff6 275
f826a10b 276/* DETACH(t) must only be called while holding t->mutex */
ea0efc06 277#ifndef DETACH
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278# define DETACH(t) \
279 STMT_START { \
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280 int _eC_; \
281 if ((_eC_ = pthread_detach((t)->self))) { \
ba869deb 282 MUTEX_UNLOCK(&(t)->mutex); \
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283 Perl_croak_nocontext("panic: DETACH (%d) [%s:%d]", \
284 _eC_, __FILE__, __LINE__); \
ba869deb 285 } \
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286 } STMT_END
287#endif /* DETACH */
33f46ff6 288
ea0efc06 289#ifndef JOIN
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290# define JOIN(t, avp) \
291 STMT_START { \
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292 int _eC_; \
293 if ((_eC_ = pthread_join((t)->self, (void**)(avp)))) \
294 Perl_croak_nocontext("panic: pthread_join (%d) [%s:%d]", \
295 _eC_, __FILE__, __LINE__); \
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296 } STMT_END
297#endif /* JOIN */
298
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299/* Use an unchecked fetch of thread-specific data instead of a checked one.
300 * It would fail if the key were bogus, but if the key were bogus then
301 * Really Bad Things would be happening anyway. --dan */
026b9da6 302#if (defined(__ALPHA) && (__VMS_VER >= 70000000)) || \
cb23e6a4 303 (defined(__alpha) && defined(__osf__) && !defined(__GNUC__)) /* Available only on >= 4.0 */
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304# define HAS_PTHREAD_UNCHECKED_GETSPECIFIC_NP /* Configure test needed */
305#endif
306
307#ifdef HAS_PTHREAD_UNCHECKED_GETSPECIFIC_NP
308# define PTHREAD_GETSPECIFIC(key) pthread_unchecked_getspecific_np(key)
309#else
6cfe8af5 310# define PTHREAD_GETSPECIFIC(key) pthread_getspecific(key)
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311#endif
312
313#ifndef PERL_GET_CONTEXT
314# define PERL_GET_CONTEXT PTHREAD_GETSPECIFIC(PL_thr_key)
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315#endif
316
317#ifndef PERL_SET_CONTEXT
318# define PERL_SET_CONTEXT(t) \
319 STMT_START { \
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320 int _eC_; \
321 if ((_eC_ = pthread_setspecific(PL_thr_key, (void *)(t)))) \
322 Perl_croak_nocontext("panic: pthread_setspecific (%d) [%s:%d]", \
323 _eC_, __FILE__, __LINE__); \
ea0efc06 324 } STMT_END
ba869deb 325#endif /* PERL_SET_CONTEXT */
ea0efc06 326
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327#ifndef INIT_THREADS
328# ifdef NEED_PTHREAD_INIT
329# define INIT_THREADS pthread_init()
330# endif
0d85d877 331#endif
ea0efc06 332
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333#ifndef ALLOC_THREAD_KEY
334# define ALLOC_THREAD_KEY \
335 STMT_START { \
23dd8dc9 336 if (pthread_key_create(&PL_thr_key, 0)) { \
b469f1e0 337 PERL_UNUSED_RESULT(write(2, STR_WITH_LEN("panic: pthread_key_create failed\n"))); \
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338 exit(1); \
339 } \
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340 } STMT_END
341#endif
342
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343#ifndef FREE_THREAD_KEY
344# define FREE_THREAD_KEY \
345 STMT_START { \
346 pthread_key_delete(PL_thr_key); \
347 } STMT_END
348#endif
349
50dd6e57 350#ifndef PTHREAD_ATFORK
144e72cb 351# ifdef HAS_PTHREAD_ATFORK
352# define PTHREAD_ATFORK(prepare,parent,child) \
de992003 353 pthread_atfork(prepare,parent,child)
144e72cb 354# else
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355# define PTHREAD_ATFORK(prepare,parent,child) \
356 NOOP
144e72cb 357# endif
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358#endif
359
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360#ifndef THREAD_RET_TYPE
361# define THREAD_RET_TYPE void *
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362#endif /* THREAD_RET */
363
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364# define LOCK_DOLLARZERO_MUTEX MUTEX_LOCK(&PL_dollarzero_mutex)
365# define UNLOCK_DOLLARZERO_MUTEX MUTEX_UNLOCK(&PL_dollarzero_mutex)
366
3db8f154 367#endif /* USE_ITHREADS */
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368
369#ifndef MUTEX_LOCK
63d37b7a 370# define MUTEX_LOCK(m) NOOP
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371#endif
372
1feb2720 373#ifndef MUTEX_UNLOCK
63d37b7a 374# define MUTEX_UNLOCK(m) NOOP
1feb2720 375#endif
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376
377#ifndef MUTEX_INIT
63d37b7a 378# define MUTEX_INIT(m) NOOP
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379#endif
380
381#ifndef MUTEX_DESTROY
63d37b7a 382# define MUTEX_DESTROY(m) NOOP
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383#endif
384
385#ifndef COND_INIT
63d37b7a 386# define COND_INIT(c) NOOP
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387#endif
388
389#ifndef COND_SIGNAL
63d37b7a 390# define COND_SIGNAL(c) NOOP
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391#endif
392
393#ifndef COND_BROADCAST
63d37b7a 394# define COND_BROADCAST(c) NOOP
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395#endif
396
397#ifndef COND_WAIT
63d37b7a 398# define COND_WAIT(c, m) NOOP
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399#endif
400
401#ifndef COND_DESTROY
63d37b7a 402# define COND_DESTROY(c) NOOP
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403#endif
404
e2975953 405#ifndef LOCK_DOLLARZERO_MUTEX
63d37b7a 406# define LOCK_DOLLARZERO_MUTEX NOOP
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407#endif
408
409#ifndef UNLOCK_DOLLARZERO_MUTEX
63d37b7a 410# define UNLOCK_DOLLARZERO_MUTEX NOOP
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411#endif
412
ba869deb 413/* THR, SET_THR, and dTHR are there for compatibility with old versions */
1feb2720 414#ifndef THR
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415# define THR PERL_GET_THX
416#endif
417
418#ifndef SET_THR
419# define SET_THR(t) PERL_SET_THX(t)
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420#endif
421
422#ifndef dTHR
423# define dTHR dNOOP
424#endif
425
426#ifndef INIT_THREADS
427# define INIT_THREADS NOOP
428#endif
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429
430/*
14d04a33 431 * ex: set ts=8 sts=4 sw=4 et:
e9a8c099 432 */