gcc/gthr-posix.h

   1 /* Threads compatibility routines for libgcc2 and libobjc.  */
   2 /* Compile this one with gcc.  */
   3 /* Copyright (C) 1997, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
   4    2008, 2009 Free Software Foundation, Inc.
   5
   6 This file is part of GCC.
   7
   8 GCC is free software; you can redistribute it and/or modify it under
   9 the terms of the GNU General Public License as published by the Free
  10 Software Foundation; either version 3, or (at your option) any later
  11 version.
  12
  13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  16 for more details.
  17
  18 Under Section 7 of GPL version 3, you are granted additional
  19 permissions described in the GCC Runtime Library Exception, version
  20 3.1, as published by the Free Software Foundation.
  21
  22 You should have received a copy of the GNU General Public License and
  23 a copy of the GCC Runtime Library Exception along with this program;
  24 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  25 <http://www.gnu.org/licenses/>.  */
  26
  27 #ifndef GCC_GTHR_POSIX_H
  28 #define GCC_GTHR_POSIX_H
  29
  30 /* POSIX threads specific definitions.
  31    Easy, since the interface is just one-to-one mapping.  */
  32
  33 #define __GTHREADS 1
  34 #define __GTHREADS_CXX0X 1
  35
  36 /* Some implementations of <pthread.h> require this to be defined.  */
  37 #if !defined(_REENTRANT) && defined(__osf__)
  38 #define _REENTRANT 1
  39 #endif
  40
  41 #include <pthread.h>
  42 #include <unistd.h>
  43
  44 typedef pthread_t __gthread_t;
  45 typedef pthread_key_t __gthread_key_t;
  46 typedef pthread_once_t __gthread_once_t;
  47 typedef pthread_mutex_t __gthread_mutex_t;
  48 typedef pthread_mutex_t __gthread_recursive_mutex_t;
  49 typedef pthread_cond_t __gthread_cond_t;
  50 typedef struct timespec __gthread_time_t;
  51
  52 /* POSIX like conditional variables are supported.  Please look at comments
  53    in gthr.h for details. */
  54 #define __GTHREAD_HAS_COND      1
  55
  56 #define __GTHREAD_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
  57 #define __GTHREAD_ONCE_INIT PTHREAD_ONCE_INIT
  58 #if defined(PTHREAD_RECURSIVE_MUTEX_INITIALIZER)
  59 #define __GTHREAD_RECURSIVE_MUTEX_INIT PTHREAD_RECURSIVE_MUTEX_INITIALIZER
  60 #elif defined(PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP)
  61 #define __GTHREAD_RECURSIVE_MUTEX_INIT PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP
  62 #else
  63 #define __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION __gthread_recursive_mutex_init_function
  64 #endif
  65 #define __GTHREAD_COND_INIT PTHREAD_COND_INITIALIZER
  66 #define __GTHREAD_TIME_INIT {0,0}
  67
  68 #if SUPPORTS_WEAK && GTHREAD_USE_WEAK
  69 # ifndef __gthrw_pragma
  70 #  define __gthrw_pragma(pragma)
  71 # endif
  72 # define __gthrw2(name,name2,type) \
  73   static __typeof(type) name __attribute__ ((__weakref__(#name2))); \
  74   __gthrw_pragma(weak type)
  75 # define __gthrw_(name) __gthrw_ ## name
  76 #else
  77 # define __gthrw2(name,name2,type)
  78 # define __gthrw_(name) name
  79 #endif
  80
  81 /* Typically, __gthrw_foo is a weak reference to symbol foo.  */
  82 #define __gthrw(name) __gthrw2(__gthrw_ ## name,name,name)
  83
  84 /* On Tru64, /usr/include/pthread.h uses #pragma extern_prefix "__" to
  85    map a subset of the POSIX pthread API to mangled versions of their
  86    names.  */
  87 #if defined(__osf__) && defined(_PTHREAD_USE_MANGLED_NAMES_)
  88 #define __gthrw3(name) __gthrw2(__gthrw_ ## name, __ ## name, name)
  89 __gthrw3(pthread_once)
  90 __gthrw3(pthread_getspecific)
  91 __gthrw3(pthread_setspecific)
  92
  93 __gthrw3(pthread_create)
  94 __gthrw3(pthread_join)
  95 __gthrw3(pthread_detach)
  96 __gthrw3(pthread_equal)
  97 __gthrw3(pthread_self)
  98 __gthrw3(pthread_cancel)
  99 __gthrw3(sched_yield)
 100
 101 __gthrw3(pthread_mutex_lock)
 102 __gthrw3(pthread_mutex_trylock)
 103 #ifdef _POSIX_TIMEOUTS
 104 #if _POSIX_TIMEOUTS >= 0
 105 __gthrw3(pthread_mutex_timedlock)
 106 #endif
 107 #endif /* _POSIX_TIMEOUTS */
 108 __gthrw3(pthread_mutex_unlock)
 109 __gthrw3(pthread_mutex_init)
 110 __gthrw3(pthread_mutex_destroy)
 111
 112 __gthrw3(pthread_cond_broadcast)
 113 __gthrw3(pthread_cond_signal)
 114 __gthrw3(pthread_cond_wait)
 115 __gthrw3(pthread_cond_timedwait)
 116 __gthrw3(pthread_cond_destroy)
 117 #else
 118 __gthrw(pthread_once)
 119 __gthrw(pthread_getspecific)
 120 __gthrw(pthread_setspecific)
 121
 122 __gthrw(pthread_create)
 123 __gthrw(pthread_join)
 124 __gthrw(pthread_equal)
 125 __gthrw(pthread_self)
 126 __gthrw(pthread_detach)
 127 __gthrw(pthread_cancel)
 128 __gthrw(sched_yield)
 129
 130 __gthrw(pthread_mutex_lock)
 131 __gthrw(pthread_mutex_trylock)
 132 #ifdef _POSIX_TIMEOUTS
 133 #if _POSIX_TIMEOUTS >= 0
 134 __gthrw(pthread_mutex_timedlock)
 135 #endif
 136 #endif /* _POSIX_TIMEOUTS */
 137 __gthrw(pthread_mutex_unlock)
 138 __gthrw(pthread_mutex_init)
 139 __gthrw(pthread_mutex_destroy)
 140
 141 __gthrw(pthread_cond_broadcast)
 142 __gthrw(pthread_cond_signal)
 143 __gthrw(pthread_cond_wait)
 144 __gthrw(pthread_cond_timedwait)
 145 __gthrw(pthread_cond_destroy)
 146 #endif
 147
 148 __gthrw(pthread_key_create)
 149 __gthrw(pthread_key_delete)
 150 __gthrw(pthread_mutexattr_init)
 151 __gthrw(pthread_mutexattr_settype)
 152 __gthrw(pthread_mutexattr_destroy)
 153
 154
 155 #if defined(_LIBOBJC) || defined(_LIBOBJC_WEAK)
 156 /* Objective-C.  */
 157 #if defined(__osf__) && defined(_PTHREAD_USE_MANGLED_NAMES_)
 158 __gthrw3(pthread_cond_init)
 159 __gthrw3(pthread_exit)
 160 #else
 161 __gthrw(pthread_cond_init)
 162 __gthrw(pthread_exit)
 163 #endif /* __osf__ && _PTHREAD_USE_MANGLED_NAMES_ */
 164 #ifdef _POSIX_PRIORITY_SCHEDULING
 165 #ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
 166 __gthrw(sched_get_priority_max)
 167 __gthrw(sched_get_priority_min)
 168 #endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */
 169 #endif /* _POSIX_PRIORITY_SCHEDULING */
 170 __gthrw(pthread_attr_destroy)
 171 __gthrw(pthread_attr_init)
 172 __gthrw(pthread_attr_setdetachstate)
 173 #ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
 174 __gthrw(pthread_getschedparam)
 175 __gthrw(pthread_setschedparam)
 176 #endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */
 177 #endif /* _LIBOBJC || _LIBOBJC_WEAK */
 178
 179 #if SUPPORTS_WEAK && GTHREAD_USE_WEAK
 180
 181 /* On Solaris 2.6 up to 9, the libc exposes a POSIX threads interface even if
 182    -pthreads is not specified.  The functions are dummies and most return an
 183    error value.  However pthread_once returns 0 without invoking the routine
 184    it is passed so we cannot pretend that the interface is active if -pthreads
 185    is not specified.  On Solaris 2.5.1, the interface is not exposed at all so
 186    we need to play the usual game with weak symbols.  On Solaris 10 and up, a
 187    working interface is always exposed.  On FreeBSD 6 and later, libc also
 188    exposes a dummy POSIX threads interface, similar to what Solaris 2.6 up
 189    to 9 does.  FreeBSD >= 700014 even provides a pthread_cancel stub in libc,
 190    which means the alternate __gthread_active_p below cannot be used there.  */
 191
 192 #if defined(__FreeBSD__) || (defined(__sun) && defined(__svr4__))
 193
 194 static volatile int __gthread_active = -1;
 195
 196 static void
 197 __gthread_trigger (void)
 198 {
 199   __gthread_active = 1;
 200 }
 201
 202 static inline int
 203 __gthread_active_p (void)
 204 {
 205   static pthread_mutex_t __gthread_active_mutex = PTHREAD_MUTEX_INITIALIZER;
 206   static pthread_once_t __gthread_active_once = PTHREAD_ONCE_INIT;
 207
 208   /* Avoid reading __gthread_active twice on the main code path.  */
 209   int __gthread_active_latest_value = __gthread_active;
 210
 211   /* This test is not protected to avoid taking a lock on the main code
 212      path so every update of __gthread_active in a threaded program must
 213      be atomic with regard to the result of the test.  */
 214   if (__builtin_expect (__gthread_active_latest_value < 0, 0))
 215     {
 216       if (__gthrw_(pthread_once))
 217         {
 218           /* If this really is a threaded program, then we must ensure that
 219              __gthread_active has been set to 1 before exiting this block.  */
 220           __gthrw_(pthread_mutex_lock) (&__gthread_active_mutex);
 221           __gthrw_(pthread_once) (&__gthread_active_once, __gthread_trigger);
 222           __gthrw_(pthread_mutex_unlock) (&__gthread_active_mutex);
 223         }
 224
 225       /* Make sure we'll never enter this block again.  */
 226       if (__gthread_active < 0)
 227         __gthread_active = 0;
 228
 229       __gthread_active_latest_value = __gthread_active;
 230     }
 231
 232   return __gthread_active_latest_value != 0;
 233 }
 234
 235 #else /* neither FreeBSD nor Solaris */
 236
 237 static inline int
 238 __gthread_active_p (void)
 239 {
 240   static void *const __gthread_active_ptr
 241     = __extension__ (void *) &__gthrw_(pthread_cancel);
 242   return __gthread_active_ptr != 0;
 243 }
 244
 245 #endif /* FreeBSD or Solaris */
 246
 247 #else /* not SUPPORTS_WEAK */
 248
 249 /* Similar to Solaris, HP-UX 11 for PA-RISC provides stubs for pthread
 250    calls in shared flavors of the HP-UX C library.  Most of the stubs
 251    have no functionality.  The details are described in the "libc cumulative
 252    patch" for each subversion of HP-UX 11.  There are two special interfaces
 253    provided for checking whether an application is linked to a pthread
 254    library or not.  However, these interfaces aren't available in early
 255    libc versions.  We also can't use pthread_once as some libc versions
 256    call the init function.  So, we use pthread_create to check whether it
 257    is possible to create a thread or not.  The stub implementation returns
 258    the error number ENOSYS.  */
 259
 260 #if defined(__hppa__) && defined(__hpux__)
 261
 262 #include <errno.h>
 263
 264 static volatile int __gthread_active = -1;
 265
 266 static void *
 267 __gthread_start (void *__arg __attribute__((unused)))
 268 {
 269   return NULL;
 270 }
 271
 272 static void __gthread_active_init (void) __attribute__((noinline));
 273 static void
 274 __gthread_active_init (void)
 275 {
 276   static pthread_mutex_t __gthread_active_mutex = PTHREAD_MUTEX_INITIALIZER;
 277   pthread_t __t;
 278   pthread_attr_t __a;
 279   int __result;
 280
 281   __gthrw_(pthread_mutex_lock) (&__gthread_active_mutex);
 282   if (__gthread_active < 0)
 283     {
 284       __gthrw_(pthread_attr_init) (&__a);
 285       __gthrw_(pthread_attr_setdetachstate) (&__a, PTHREAD_CREATE_DETACHED);
 286       __result = __gthrw_(pthread_create) (&__t, &__a, __gthread_start, NULL);
 287       if (__result != ENOSYS)
 288         __gthread_active = 1;
 289       else
 290         __gthread_active = 0;
 291       __gthrw_(pthread_attr_destroy) (&__a);
 292     }
 293   __gthrw_(pthread_mutex_unlock) (&__gthread_active_mutex);
 294 }
 295
 296 static inline int
 297 __gthread_active_p (void)
 298 {
 299   /* Avoid reading __gthread_active twice on the main code path.  */
 300   int __gthread_active_latest_value = __gthread_active;
 301
 302   /* This test is not protected to avoid taking a lock on the main code
 303      path so every update of __gthread_active in a threaded program must
 304      be atomic with regard to the result of the test.  */
 305   if (__builtin_expect (__gthread_active_latest_value < 0, 0))
 306     {
 307       __gthread_active_init ();
 308       __gthread_active_latest_value = __gthread_active;
 309     }
 310
 311   return __gthread_active_latest_value != 0;
 312 }
 313
 314 #else /* not hppa-hpux */
 315
 316 static inline int
 317 __gthread_active_p (void)
 318 {
 319   return 1;
 320 }
 321
 322 #endif /* hppa-hpux */
 323
 324 #endif /* SUPPORTS_WEAK */
 325
 326 #ifdef _LIBOBJC
 327
 328 /* This is the config.h file in libobjc/ */
 329 #include <config.h>
 330
 331 #ifdef HAVE_SCHED_H
 332 # include <sched.h>
 333 #endif
 334
 335 /* Key structure for maintaining thread specific storage */
 336 static pthread_key_t _objc_thread_storage;
 337 static pthread_attr_t _objc_thread_attribs;
 338
 339 /* Thread local storage for a single thread */
 340 static void *thread_local_storage = NULL;
 341
 342 /* Backend initialization functions */
 343
 344 /* Initialize the threads subsystem.  */
 345 static inline int
 346 __gthread_objc_init_thread_system (void)
 347 {
 348   if (__gthread_active_p ())
 349     {
 350       /* Initialize the thread storage key.  */
 351       if (__gthrw_(pthread_key_create) (&_objc_thread_storage, NULL) == 0)
 352         {
 353           /* The normal default detach state for threads is
 354            * PTHREAD_CREATE_JOINABLE which causes threads to not die
 355            * when you think they should.  */
 356           if (__gthrw_(pthread_attr_init) (&_objc_thread_attribs) == 0
 357               && __gthrw_(pthread_attr_setdetachstate) (&_objc_thread_attribs,
 358                                               PTHREAD_CREATE_DETACHED) == 0)
 359             return 0;
 360         }
 361     }
 362
 363   return -1;
 364 }
 365
 366 /* Close the threads subsystem.  */
 367 static inline int
 368 __gthread_objc_close_thread_system (void)
 369 {
 370   if (__gthread_active_p ()
 371       && __gthrw_(pthread_key_delete) (_objc_thread_storage) == 0
 372       && __gthrw_(pthread_attr_destroy) (&_objc_thread_attribs) == 0)
 373     return 0;
 374
 375   return -1;
 376 }
 377
 378 /* Backend thread functions */
 379
 380 /* Create a new thread of execution.  */
 381 static inline objc_thread_t
 382 __gthread_objc_thread_detach (void (*func)(void *), void *arg)
 383 {
 384   objc_thread_t thread_id;
 385   pthread_t new_thread_handle;
 386
 387   if (!__gthread_active_p ())
 388     return NULL;
 389
 390   if (!(__gthrw_(pthread_create) (&new_thread_handle, NULL, (void *) func, arg)))
 391     thread_id = (objc_thread_t) new_thread_handle;
 392   else
 393     thread_id = NULL;
 394
 395   return thread_id;
 396 }
 397
 398 /* Set the current thread's priority.  */
 399 static inline int
 400 __gthread_objc_thread_set_priority (int priority)
 401 {
 402   if (!__gthread_active_p ())
 403     return -1;
 404   else
 405     {
 406 #ifdef _POSIX_PRIORITY_SCHEDULING
 407 #ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
 408       pthread_t thread_id = __gthrw_(pthread_self) ();
 409       int policy;
 410       struct sched_param params;
 411       int priority_min, priority_max;
 412
 413       if (__gthrw_(pthread_getschedparam) (thread_id, &policy, &params) == 0)
 414         {
 415           if ((priority_max = __gthrw_(sched_get_priority_max) (policy)) == -1)
 416             return -1;
 417
 418           if ((priority_min = __gthrw_(sched_get_priority_min) (policy)) == -1)
 419             return -1;
 420
 421           if (priority > priority_max)
 422             priority = priority_max;
 423           else if (priority < priority_min)
 424             priority = priority_min;
 425           params.sched_priority = priority;
 426
 427           /*
 428            * The solaris 7 and several other man pages incorrectly state that
 429            * this should be a pointer to policy but pthread.h is universally
 430            * at odds with this.
 431            */
 432           if (__gthrw_(pthread_setschedparam) (thread_id, policy, &params) == 0)
 433             return 0;
 434         }
 435 #endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */
 436 #endif /* _POSIX_PRIORITY_SCHEDULING */
 437       return -1;
 438     }
 439 }
 440
 441 /* Return the current thread's priority.  */
 442 static inline int
 443 __gthread_objc_thread_get_priority (void)
 444 {
 445 #ifdef _POSIX_PRIORITY_SCHEDULING
 446 #ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
 447   if (__gthread_active_p ())
 448     {
 449       int policy;
 450       struct sched_param params;
 451
 452       if (__gthrw_(pthread_getschedparam) (__gthrw_(pthread_self) (), &policy, &params) == 0)
 453         return params.sched_priority;
 454       else
 455         return -1;
 456     }
 457   else
 458 #endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */
 459 #endif /* _POSIX_PRIORITY_SCHEDULING */
 460     return OBJC_THREAD_INTERACTIVE_PRIORITY;
 461 }
 462
 463 /* Yield our process time to another thread.  */
 464 static inline void
 465 __gthread_objc_thread_yield (void)
 466 {
 467   if (__gthread_active_p ())
 468     __gthrw_(sched_yield) ();
 469 }
 470
 471 /* Terminate the current thread.  */
 472 static inline int
 473 __gthread_objc_thread_exit (void)
 474 {
 475   if (__gthread_active_p ())
 476     /* exit the thread */
 477     __gthrw_(pthread_exit) (&__objc_thread_exit_status);
 478
 479   /* Failed if we reached here */
 480   return -1;
 481 }
 482
 483 /* Returns an integer value which uniquely describes a thread.  */
 484 static inline objc_thread_t
 485 __gthread_objc_thread_id (void)
 486 {
 487   if (__gthread_active_p ())
 488     return (objc_thread_t) __gthrw_(pthread_self) ();
 489   else
 490     return (objc_thread_t) 1;
 491 }
 492
 493 /* Sets the thread's local storage pointer.  */
 494 static inline int
 495 __gthread_objc_thread_set_data (void *value)
 496 {
 497   if (__gthread_active_p ())
 498     return __gthrw_(pthread_setspecific) (_objc_thread_storage, value);
 499   else
 500     {
 501       thread_local_storage = value;
 502       return 0;
 503     }
 504 }
 505
 506 /* Returns the thread's local storage pointer.  */
 507 static inline void *
 508 __gthread_objc_thread_get_data (void)
 509 {
 510   if (__gthread_active_p ())
 511     return __gthrw_(pthread_getspecific) (_objc_thread_storage);
 512   else
 513     return thread_local_storage;
 514 }
 515
 516 /* Backend mutex functions */
 517
 518 /* Allocate a mutex.  */
 519 static inline int
 520 __gthread_objc_mutex_allocate (objc_mutex_t mutex)
 521 {
 522   if (__gthread_active_p ())
 523     {
 524       mutex->backend = objc_malloc (sizeof (pthread_mutex_t));
 525
 526       if (__gthrw_(pthread_mutex_init) ((pthread_mutex_t *) mutex->backend, NULL))
 527         {
 528           objc_free (mutex->backend);
 529           mutex->backend = NULL;
 530           return -1;
 531         }
 532     }
 533
 534   return 0;
 535 }
 536
 537 /* Deallocate a mutex.  */
 538 static inline int
 539 __gthread_objc_mutex_deallocate (objc_mutex_t mutex)
 540 {
 541   if (__gthread_active_p ())
 542     {
 543       int count;
 544
 545       /*
 546        * Posix Threads specifically require that the thread be unlocked
 547        * for __gthrw_(pthread_mutex_destroy) to work.
 548        */
 549
 550       do
 551         {
 552           count = __gthrw_(pthread_mutex_unlock) ((pthread_mutex_t *) mutex->backend);
 553           if (count < 0)
 554             return -1;
 555         }
 556       while (count);
 557
 558       if (__gthrw_(pthread_mutex_destroy) ((pthread_mutex_t *) mutex->backend))
 559         return -1;
 560
 561       objc_free (mutex->backend);
 562       mutex->backend = NULL;
 563     }
 564   return 0;
 565 }
 566
 567 /* Grab a lock on a mutex.  */
 568 static inline int
 569 __gthread_objc_mutex_lock (objc_mutex_t mutex)
 570 {
 571   if (__gthread_active_p ()
 572       && __gthrw_(pthread_mutex_lock) ((pthread_mutex_t *) mutex->backend) != 0)
 573     {
 574       return -1;
 575     }
 576
 577   return 0;
 578 }
 579
 580 /* Try to grab a lock on a mutex.  */
 581 static inline int
 582 __gthread_objc_mutex_trylock (objc_mutex_t mutex)
 583 {
 584   if (__gthread_active_p ()
 585       && __gthrw_(pthread_mutex_trylock) ((pthread_mutex_t *) mutex->backend) != 0)
 586     {
 587       return -1;
 588     }
 589
 590   return 0;
 591 }
 592
 593 /* Unlock the mutex */
 594 static inline int
 595 __gthread_objc_mutex_unlock (objc_mutex_t mutex)
 596 {
 597   if (__gthread_active_p ()
 598       && __gthrw_(pthread_mutex_unlock) ((pthread_mutex_t *) mutex->backend) != 0)
 599     {
 600       return -1;
 601     }
 602
 603   return 0;
 604 }
 605
 606 /* Backend condition mutex functions */
 607
 608 /* Allocate a condition.  */
 609 static inline int
 610 __gthread_objc_condition_allocate (objc_condition_t condition)
 611 {
 612   if (__gthread_active_p ())
 613     {
 614       condition->backend = objc_malloc (sizeof (pthread_cond_t));
 615
 616       if (__gthrw_(pthread_cond_init) ((pthread_cond_t *) condition->backend, NULL))
 617         {
 618           objc_free (condition->backend);
 619           condition->backend = NULL;
 620           return -1;
 621         }
 622     }
 623
 624   return 0;
 625 }
 626
 627 /* Deallocate a condition.  */
 628 static inline int
 629 __gthread_objc_condition_deallocate (objc_condition_t condition)
 630 {
 631   if (__gthread_active_p ())
 632     {
 633       if (__gthrw_(pthread_cond_destroy) ((pthread_cond_t *) condition->backend))
 634         return -1;
 635
 636       objc_free (condition->backend);
 637       condition->backend = NULL;
 638     }
 639   return 0;
 640 }
 641
 642 /* Wait on the condition */
 643 static inline int
 644 __gthread_objc_condition_wait (objc_condition_t condition, objc_mutex_t mutex)
 645 {
 646   if (__gthread_active_p ())
 647     return __gthrw_(pthread_cond_wait) ((pthread_cond_t *) condition->backend,
 648                               (pthread_mutex_t *) mutex->backend);
 649   else
 650     return 0;
 651 }
 652
 653 /* Wake up all threads waiting on this condition.  */
 654 static inline int
 655 __gthread_objc_condition_broadcast (objc_condition_t condition)
 656 {
 657   if (__gthread_active_p ())
 658     return __gthrw_(pthread_cond_broadcast) ((pthread_cond_t *) condition->backend);
 659   else
 660     return 0;
 661 }
 662
 663 /* Wake up one thread waiting on this condition.  */
 664 static inline int
 665 __gthread_objc_condition_signal (objc_condition_t condition)
 666 {
 667   if (__gthread_active_p ())
 668     return __gthrw_(pthread_cond_signal) ((pthread_cond_t *) condition->backend);
 669   else
 670     return 0;
 671 }
 672
 673 #else /* _LIBOBJC */
 674
 675 static inline int
 676 __gthread_create (__gthread_t *__threadid, void *(*__func) (void*),
 677                   void *__args)
 678 {
 679   return __gthrw_(pthread_create) (__threadid, NULL, __func, __args);
 680 }
 681
 682 static inline int
 683 __gthread_join (__gthread_t __threadid, void **__value_ptr)
 684 {
 685   return __gthrw_(pthread_join) (__threadid, __value_ptr);
 686 }
 687
 688 static inline int
 689 __gthread_detach (__gthread_t __threadid)
 690 {
 691   return __gthrw_(pthread_detach) (__threadid);
 692 }
 693
 694 static inline int
 695 __gthread_equal (__gthread_t __t1, __gthread_t __t2)
 696 {
 697   return __gthrw_(pthread_equal) (__t1, __t2);
 698 }
 699
 700 static inline __gthread_t
 701 __gthread_self (void)
 702 {
 703   return __gthrw_(pthread_self) ();
 704 }
 705
 706 static inline int
 707 __gthread_yield (void)
 708 {
 709   return __gthrw_(sched_yield) ();
 710 }
 711
 712 static inline int
 713 __gthread_once (__gthread_once_t *__once, void (*__func) (void))
 714 {
 715   if (__gthread_active_p ())
 716     return __gthrw_(pthread_once) (__once, __func);
 717   else
 718     return -1;
 719 }
 720
 721 static inline int
 722 __gthread_key_create (__gthread_key_t *__key, void (*__dtor) (void *))
 723 {
 724   return __gthrw_(pthread_key_create) (__key, __dtor);
 725 }
 726
 727 static inline int
 728 __gthread_key_delete (__gthread_key_t __key)
 729 {
 730   return __gthrw_(pthread_key_delete) (__key);
 731 }
 732
 733 static inline void *
 734 __gthread_getspecific (__gthread_key_t __key)
 735 {
 736   return __gthrw_(pthread_getspecific) (__key);
 737 }
 738
 739 static inline int
 740 __gthread_setspecific (__gthread_key_t __key, const void *__ptr)
 741 {
 742   return __gthrw_(pthread_setspecific) (__key, __ptr);
 743 }
 744
 745 static inline int
 746 __gthread_mutex_destroy (__gthread_mutex_t *__mutex)
 747 {
 748   if (__gthread_active_p ())
 749     return __gthrw_(pthread_mutex_destroy) (__mutex);
 750   else
 751     return 0;
 752 }
 753
 754 static inline int
 755 __gthread_mutex_lock (__gthread_mutex_t *__mutex)
 756 {
 757   if (__gthread_active_p ())
 758     return __gthrw_(pthread_mutex_lock) (__mutex);
 759   else
 760     return 0;
 761 }
 762
 763 static inline int
 764 __gthread_mutex_trylock (__gthread_mutex_t *__mutex)
 765 {
 766   if (__gthread_active_p ())
 767     return __gthrw_(pthread_mutex_trylock) (__mutex);
 768   else
 769     return 0;
 770 }
 771
 772 #ifdef _POSIX_TIMEOUTS
 773 #if _POSIX_TIMEOUTS >= 0
 774 static inline int
 775 __gthread_mutex_timedlock (__gthread_mutex_t *__mutex,
 776                            const __gthread_time_t *__abs_timeout)
 777 {
 778   if (__gthread_active_p ())
 779     return __gthrw_(pthread_mutex_timedlock) (__mutex, __abs_timeout);
 780   else
 781     return 0;
 782 }
 783 #endif
 784 #endif
 785
 786 static inline int
 787 __gthread_mutex_unlock (__gthread_mutex_t *__mutex)
 788 {
 789   if (__gthread_active_p ())
 790     return __gthrw_(pthread_mutex_unlock) (__mutex);
 791   else
 792     return 0;
 793 }
 794
 795 #ifndef PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP
 796 static inline int
 797 __gthread_recursive_mutex_init_function (__gthread_recursive_mutex_t *__mutex)
 798 {
 799   if (__gthread_active_p ())
 800     {
 801       pthread_mutexattr_t __attr;
 802       int __r;
 803
 804       __r = __gthrw_(pthread_mutexattr_init) (&__attr);
 805       if (!__r)
 806         __r = __gthrw_(pthread_mutexattr_settype) (&__attr,
 807                                                    PTHREAD_MUTEX_RECURSIVE);
 808       if (!__r)
 809         __r = __gthrw_(pthread_mutex_init) (__mutex, &__attr);
 810       if (!__r)
 811         __r = __gthrw_(pthread_mutexattr_destroy) (&__attr);
 812       return __r;
 813     }
 814   return 0;
 815 }
 816 #endif
 817
 818 static inline int
 819 __gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *__mutex)
 820 {
 821   return __gthread_mutex_lock (__mutex);
 822 }
 823
 824 static inline int
 825 __gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *__mutex)
 826 {
 827   return __gthread_mutex_trylock (__mutex);
 828 }
 829
 830 #ifdef _POSIX_TIMEOUTS
 831 #if _POSIX_TIMEOUTS >= 0
 832 static inline int
 833 __gthread_recursive_mutex_timedlock (__gthread_recursive_mutex_t *__mutex,
 834                                      const __gthread_time_t *__abs_timeout)
 835 {
 836   return __gthread_mutex_timedlock (__mutex, __abs_timeout);
 837 }
 838 #endif
 839 #endif
 840
 841 static inline int
 842 __gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *__mutex)
 843 {
 844   return __gthread_mutex_unlock (__mutex);
 845 }
 846
 847 static inline int
 848 __gthread_cond_broadcast (__gthread_cond_t *__cond)
 849 {
 850   return __gthrw_(pthread_cond_broadcast) (__cond);
 851 }
 852
 853 static inline int
 854 __gthread_cond_signal (__gthread_cond_t *__cond)
 855 {
 856   return __gthrw_(pthread_cond_signal) (__cond);
 857 }
 858
 859 static inline int
 860 __gthread_cond_wait (__gthread_cond_t *__cond, __gthread_mutex_t *__mutex)
 861 {
 862   return __gthrw_(pthread_cond_wait) (__cond, __mutex);
 863 }
 864
 865 static inline int
 866 __gthread_cond_timedwait (__gthread_cond_t *__cond, __gthread_mutex_t *__mutex,
 867                           const __gthread_time_t *__abs_timeout)
 868 {
 869   return __gthrw_(pthread_cond_timedwait) (__cond, __mutex, __abs_timeout);
 870 }
 871
 872 static inline int
 873 __gthread_cond_wait_recursive (__gthread_cond_t *__cond,
 874                                __gthread_recursive_mutex_t *__mutex)
 875 {
 876   return __gthread_cond_wait (__cond, __mutex);
 877 }
 878
 879 static inline int
 880 __gthread_cond_timedwait_recursive (__gthread_cond_t *__cond,
 881                                     __gthread_recursive_mutex_t *__mutex,
 882                                     const __gthread_time_t *__abs_timeout)
 883 {
 884   return __gthread_cond_timedwait (__cond, __mutex, __abs_timeout);
 885 }
 886
 887 static inline int
 888 __gthread_cond_destroy (__gthread_cond_t* __cond)
 889 {
 890   return __gthrw_(pthread_cond_destroy) (__cond);
 891 }
 892
 893 #endif /* _LIBOBJC */
 894
 895 #endif /* ! GCC_GTHR_POSIX_H */