libgcc/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, 2010, 2011 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
  43 #if ((defined(_LIBOBJC) || defined(_LIBOBJC_WEAK)) \
  44      || !defined(_GTHREAD_USE_MUTEX_TIMEDLOCK))
  45 # include <unistd.h>
  46 # if defined(_POSIX_TIMEOUTS) && _POSIX_TIMEOUTS >= 0
  47 #  define _GTHREAD_USE_MUTEX_TIMEDLOCK 1
  48 # else
  49 #  define _GTHREAD_USE_MUTEX_TIMEDLOCK 0
  50 # endif
  51 #endif
  52
  53 typedef pthread_t __gthread_t;
  54 typedef pthread_key_t __gthread_key_t;
  55 typedef pthread_once_t __gthread_once_t;
  56 typedef pthread_mutex_t __gthread_mutex_t;
  57 typedef pthread_mutex_t __gthread_recursive_mutex_t;
  58 typedef pthread_cond_t __gthread_cond_t;
  59 typedef struct timespec __gthread_time_t;
  60
  61 /* POSIX like conditional variables are supported.  Please look at comments
  62    in gthr.h for details. */
  63 #define __GTHREAD_HAS_COND      1
  64
  65 #define __GTHREAD_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
  66 #define __GTHREAD_ONCE_INIT PTHREAD_ONCE_INIT
  67 #if defined(PTHREAD_RECURSIVE_MUTEX_INITIALIZER)
  68 #define __GTHREAD_RECURSIVE_MUTEX_INIT PTHREAD_RECURSIVE_MUTEX_INITIALIZER
  69 #elif defined(PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP)
  70 #define __GTHREAD_RECURSIVE_MUTEX_INIT PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP
  71 #else
  72 #define __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION __gthread_recursive_mutex_init_function
  73 #endif
  74 #define __GTHREAD_COND_INIT PTHREAD_COND_INITIALIZER
  75 #define __GTHREAD_TIME_INIT {0,0}
  76
  77 #if SUPPORTS_WEAK && GTHREAD_USE_WEAK
  78 # ifndef __gthrw_pragma
  79 #  define __gthrw_pragma(pragma)
  80 # endif
  81 # define __gthrw2(name,name2,type) \
  82   static __typeof(type) name __attribute__ ((__weakref__(#name2))); \
  83   __gthrw_pragma(weak type)
  84 # define __gthrw_(name) __gthrw_ ## name
  85 #else
  86 # define __gthrw2(name,name2,type)
  87 # define __gthrw_(name) name
  88 #endif
  89
  90 /* Typically, __gthrw_foo is a weak reference to symbol foo.  */
  91 #define __gthrw(name) __gthrw2(__gthrw_ ## name,name,name)
  92
  93 /* On Tru64, /usr/include/pthread.h uses #pragma extern_prefix "__" to
  94    map a subset of the POSIX pthread API to mangled versions of their
  95    names.  */
  96 #if defined(__osf__) && defined(_PTHREAD_USE_MANGLED_NAMES_)
  97 #define __gthrw3(name) __gthrw2(__gthrw_ ## name, __ ## name, name)
  98 __gthrw3(pthread_once)
  99 __gthrw3(pthread_getspecific)
 100 __gthrw3(pthread_setspecific)
 101
 102 __gthrw3(pthread_create)
 103 __gthrw3(pthread_join)
 104 __gthrw3(pthread_detach)
 105 __gthrw3(pthread_equal)
 106 __gthrw3(pthread_self)
 107 __gthrw3(pthread_cancel)
 108 __gthrw3(sched_yield)
 109
 110 __gthrw3(pthread_mutex_lock)
 111 __gthrw3(pthread_mutex_trylock)
 112 #if _GTHREAD_USE_MUTEX_TIMEDLOCK
 113 __gthrw3(pthread_mutex_timedlock)
 114 #endif
 115 __gthrw3(pthread_mutex_unlock)
 116 __gthrw3(pthread_mutex_init)
 117 __gthrw3(pthread_mutex_destroy)
 118
 119 __gthrw3(pthread_cond_broadcast)
 120 __gthrw3(pthread_cond_signal)
 121 __gthrw3(pthread_cond_wait)
 122 __gthrw3(pthread_cond_timedwait)
 123 __gthrw3(pthread_cond_destroy)
 124 #else
 125 __gthrw(pthread_once)
 126 __gthrw(pthread_getspecific)
 127 __gthrw(pthread_setspecific)
 128
 129 __gthrw(pthread_create)
 130 __gthrw(pthread_join)
 131 __gthrw(pthread_equal)
 132 __gthrw(pthread_self)
 133 __gthrw(pthread_detach)
 134 #ifndef __BIONIC__
 135 __gthrw(pthread_cancel)
 136 #endif
 137 __gthrw(sched_yield)
 138
 139 __gthrw(pthread_mutex_lock)
 140 __gthrw(pthread_mutex_trylock)
 141 #if _GTHREAD_USE_MUTEX_TIMEDLOCK
 142 __gthrw(pthread_mutex_timedlock)
 143 #endif
 144 __gthrw(pthread_mutex_unlock)
 145 __gthrw(pthread_mutex_init)
 146 __gthrw(pthread_mutex_destroy)
 147
 148 __gthrw(pthread_cond_broadcast)
 149 __gthrw(pthread_cond_signal)
 150 __gthrw(pthread_cond_wait)
 151 __gthrw(pthread_cond_timedwait)
 152 __gthrw(pthread_cond_destroy)
 153 #endif
 154
 155 __gthrw(pthread_key_create)
 156 __gthrw(pthread_key_delete)
 157 __gthrw(pthread_mutexattr_init)
 158 __gthrw(pthread_mutexattr_settype)
 159 __gthrw(pthread_mutexattr_destroy)
 160
 161
 162 #if defined(_LIBOBJC) || defined(_LIBOBJC_WEAK)
 163 /* Objective-C.  */
 164 #if defined(__osf__) && defined(_PTHREAD_USE_MANGLED_NAMES_)
 165 __gthrw3(pthread_cond_init)
 166 __gthrw3(pthread_exit)
 167 #else
 168 __gthrw(pthread_cond_init)
 169 __gthrw(pthread_exit)
 170 #endif /* __osf__ && _PTHREAD_USE_MANGLED_NAMES_ */
 171 #ifdef _POSIX_PRIORITY_SCHEDULING
 172 #ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
 173 __gthrw(sched_get_priority_max)
 174 __gthrw(sched_get_priority_min)
 175 #endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */
 176 #endif /* _POSIX_PRIORITY_SCHEDULING */
 177 __gthrw(pthread_attr_destroy)
 178 __gthrw(pthread_attr_init)
 179 __gthrw(pthread_attr_setdetachstate)
 180 #ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
 181 __gthrw(pthread_getschedparam)
 182 __gthrw(pthread_setschedparam)
 183 #endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */
 184 #endif /* _LIBOBJC || _LIBOBJC_WEAK */
 185
 186 #if SUPPORTS_WEAK && GTHREAD_USE_WEAK
 187
 188 /* On Solaris 2.6 up to 9, the libc exposes a POSIX threads interface even if
 189    -pthreads is not specified.  The functions are dummies and most return an
 190    error value.  However pthread_once returns 0 without invoking the routine
 191    it is passed so we cannot pretend that the interface is active if -pthreads
 192    is not specified.  On Solaris 2.5.1, the interface is not exposed at all so
 193    we need to play the usual game with weak symbols.  On Solaris 10 and up, a
 194    working interface is always exposed.  On FreeBSD 6 and later, libc also
 195    exposes a dummy POSIX threads interface, similar to what Solaris 2.6 up
 196    to 9 does.  FreeBSD >= 700014 even provides a pthread_cancel stub in libc,
 197    which means the alternate __gthread_active_p below cannot be used there.  */
 198
 199 #if defined(__FreeBSD__) || (defined(__sun) && defined(__svr4__))
 200
 201 static volatile int __gthread_active = -1;
 202
 203 static void
 204 __gthread_trigger (void)
 205 {
 206   __gthread_active = 1;
 207 }
 208
 209 static inline int
 210 __gthread_active_p (void)
 211 {
 212   static pthread_mutex_t __gthread_active_mutex = PTHREAD_MUTEX_INITIALIZER;
 213   static pthread_once_t __gthread_active_once = PTHREAD_ONCE_INIT;
 214
 215   /* Avoid reading __gthread_active twice on the main code path.  */
 216   int __gthread_active_latest_value = __gthread_active;
 217
 218   /* This test is not protected to avoid taking a lock on the main code
 219      path so every update of __gthread_active in a threaded program must
 220      be atomic with regard to the result of the test.  */
 221   if (__builtin_expect (__gthread_active_latest_value < 0, 0))
 222     {
 223       if (__gthrw_(pthread_once))
 224         {
 225           /* If this really is a threaded program, then we must ensure that
 226              __gthread_active has been set to 1 before exiting this block.  */
 227           __gthrw_(pthread_mutex_lock) (&__gthread_active_mutex);
 228           __gthrw_(pthread_once) (&__gthread_active_once, __gthread_trigger);
 229           __gthrw_(pthread_mutex_unlock) (&__gthread_active_mutex);
 230         }
 231
 232       /* Make sure we'll never enter this block again.  */
 233       if (__gthread_active < 0)
 234         __gthread_active = 0;
 235
 236       __gthread_active_latest_value = __gthread_active;
 237     }
 238
 239   return __gthread_active_latest_value != 0;
 240 }
 241
 242 #else /* neither FreeBSD nor Solaris */
 243
 244 static inline int
 245 __gthread_active_p (void)
 246 {
 247 /* Android's C library does not provide pthread_cancel, check for
 248    `pthread_create' instead.  */
 249 #ifndef __BIONIC__
 250   static void *const __gthread_active_ptr
 251     = __extension__ (void *) &__gthrw_(pthread_cancel);
 252 #else
 253   static void *const __gthread_active_ptr
 254     = __extension__ (void *) &__gthrw_(pthread_create);
 255 #endif
 256   return __gthread_active_ptr != 0;
 257 }
 258
 259 #endif /* FreeBSD or Solaris */
 260
 261 #else /* not SUPPORTS_WEAK */
 262
 263 /* Similar to Solaris, HP-UX 11 for PA-RISC provides stubs for pthread
 264    calls in shared flavors of the HP-UX C library.  Most of the stubs
 265    have no functionality.  The details are described in the "libc cumulative
 266    patch" for each subversion of HP-UX 11.  There are two special interfaces
 267    provided for checking whether an application is linked to a shared pthread
 268    library or not.  However, these interfaces aren't available in early
 269    libpthread libraries.  We also need a test that works for archive
 270    libraries.  We can't use pthread_once as some libc versions call the
 271    init function.  We also can't use pthread_create or pthread_attr_init
 272    as these create a thread and thereby prevent changing the default stack
 273    size.  The function pthread_default_stacksize_np is available in both
 274    the archive and shared versions of libpthread.   It can be used to
 275    determine the default pthread stack size.  There is a stub in some
 276    shared libc versions which returns a zero size if pthreads are not
 277    active.  We provide an equivalent stub to handle cases where libc
 278    doesn't provide one.  */
 279
 280 #if defined(__hppa__) && defined(__hpux__)
 281
 282 static volatile int __gthread_active = -1;
 283
 284 static inline int
 285 __gthread_active_p (void)
 286 {
 287   /* Avoid reading __gthread_active twice on the main code path.  */
 288   int __gthread_active_latest_value = __gthread_active;
 289   size_t __s;
 290
 291   if (__builtin_expect (__gthread_active_latest_value < 0, 0))
 292     {
 293       pthread_default_stacksize_np (0, &__s);
 294       __gthread_active = __s ? 1 : 0;
 295       __gthread_active_latest_value = __gthread_active;
 296     }
 297
 298   return __gthread_active_latest_value != 0;
 299 }
 300
 301 #else /* not hppa-hpux */
 302
 303 static inline int
 304 __gthread_active_p (void)
 305 {
 306   return 1;
 307 }
 308
 309 #endif /* hppa-hpux */
 310
 311 #endif /* SUPPORTS_WEAK */
 312
 313 #ifdef _LIBOBJC
 314
 315 /* This is the config.h file in libobjc/ */
 316 #include <config.h>
 317
 318 #ifdef HAVE_SCHED_H
 319 # include <sched.h>
 320 #endif
 321
 322 /* Key structure for maintaining thread specific storage */
 323 static pthread_key_t _objc_thread_storage;
 324 static pthread_attr_t _objc_thread_attribs;
 325
 326 /* Thread local storage for a single thread */
 327 static void *thread_local_storage = NULL;
 328
 329 /* Backend initialization functions */
 330
 331 /* Initialize the threads subsystem.  */
 332 static inline int
 333 __gthread_objc_init_thread_system (void)
 334 {
 335   if (__gthread_active_p ())
 336     {
 337       /* Initialize the thread storage key.  */
 338       if (__gthrw_(pthread_key_create) (&_objc_thread_storage, NULL) == 0)
 339         {
 340           /* The normal default detach state for threads is
 341            * PTHREAD_CREATE_JOINABLE which causes threads to not die
 342            * when you think they should.  */
 343           if (__gthrw_(pthread_attr_init) (&_objc_thread_attribs) == 0
 344               && __gthrw_(pthread_attr_setdetachstate) (&_objc_thread_attribs,
 345                                               PTHREAD_CREATE_DETACHED) == 0)
 346             return 0;
 347         }
 348     }
 349
 350   return -1;
 351 }
 352
 353 /* Close the threads subsystem.  */
 354 static inline int
 355 __gthread_objc_close_thread_system (void)
 356 {
 357   if (__gthread_active_p ()
 358       && __gthrw_(pthread_key_delete) (_objc_thread_storage) == 0
 359       && __gthrw_(pthread_attr_destroy) (&_objc_thread_attribs) == 0)
 360     return 0;
 361
 362   return -1;
 363 }
 364
 365 /* Backend thread functions */
 366
 367 /* Create a new thread of execution.  */
 368 static inline objc_thread_t
 369 __gthread_objc_thread_detach (void (*func)(void *), void *arg)
 370 {
 371   objc_thread_t thread_id;
 372   pthread_t new_thread_handle;
 373
 374   if (!__gthread_active_p ())
 375     return NULL;
 376
 377   if (!(__gthrw_(pthread_create) (&new_thread_handle, &_objc_thread_attribs,
 378                                   (void *) func, arg)))
 379     thread_id = (objc_thread_t) new_thread_handle;
 380   else
 381     thread_id = NULL;
 382
 383   return thread_id;
 384 }
 385
 386 /* Set the current thread's priority.  */
 387 static inline int
 388 __gthread_objc_thread_set_priority (int priority)
 389 {
 390   if (!__gthread_active_p ())
 391     return -1;
 392   else
 393     {
 394 #ifdef _POSIX_PRIORITY_SCHEDULING
 395 #ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
 396       pthread_t thread_id = __gthrw_(pthread_self) ();
 397       int policy;
 398       struct sched_param params;
 399       int priority_min, priority_max;
 400
 401       if (__gthrw_(pthread_getschedparam) (thread_id, &policy, &params) == 0)
 402         {
 403           if ((priority_max = __gthrw_(sched_get_priority_max) (policy)) == -1)
 404             return -1;
 405
 406           if ((priority_min = __gthrw_(sched_get_priority_min) (policy)) == -1)
 407             return -1;
 408
 409           if (priority > priority_max)
 410             priority = priority_max;
 411           else if (priority < priority_min)
 412             priority = priority_min;
 413           params.sched_priority = priority;
 414
 415           /*
 416            * The solaris 7 and several other man pages incorrectly state that
 417            * this should be a pointer to policy but pthread.h is universally
 418            * at odds with this.
 419            */
 420           if (__gthrw_(pthread_setschedparam) (thread_id, policy, &params) == 0)
 421             return 0;
 422         }
 423 #endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */
 424 #endif /* _POSIX_PRIORITY_SCHEDULING */
 425       return -1;
 426     }
 427 }
 428
 429 /* Return the current thread's priority.  */
 430 static inline int
 431 __gthread_objc_thread_get_priority (void)
 432 {
 433 #ifdef _POSIX_PRIORITY_SCHEDULING
 434 #ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
 435   if (__gthread_active_p ())
 436     {
 437       int policy;
 438       struct sched_param params;
 439
 440       if (__gthrw_(pthread_getschedparam) (__gthrw_(pthread_self) (), &policy, &params) == 0)
 441         return params.sched_priority;
 442       else
 443         return -1;
 444     }
 445   else
 446 #endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */
 447 #endif /* _POSIX_PRIORITY_SCHEDULING */
 448     return OBJC_THREAD_INTERACTIVE_PRIORITY;
 449 }
 450
 451 /* Yield our process time to another thread.  */
 452 static inline void
 453 __gthread_objc_thread_yield (void)
 454 {
 455   if (__gthread_active_p ())
 456     __gthrw_(sched_yield) ();
 457 }
 458
 459 /* Terminate the current thread.  */
 460 static inline int
 461 __gthread_objc_thread_exit (void)
 462 {
 463   if (__gthread_active_p ())
 464     /* exit the thread */
 465     __gthrw_(pthread_exit) (&__objc_thread_exit_status);
 466
 467   /* Failed if we reached here */
 468   return -1;
 469 }
 470
 471 /* Returns an integer value which uniquely describes a thread.  */
 472 static inline objc_thread_t
 473 __gthread_objc_thread_id (void)
 474 {
 475   if (__gthread_active_p ())
 476     return (objc_thread_t) __gthrw_(pthread_self) ();
 477   else
 478     return (objc_thread_t) 1;
 479 }
 480
 481 /* Sets the thread's local storage pointer.  */
 482 static inline int
 483 __gthread_objc_thread_set_data (void *value)
 484 {
 485   if (__gthread_active_p ())
 486     return __gthrw_(pthread_setspecific) (_objc_thread_storage, value);
 487   else
 488     {
 489       thread_local_storage = value;
 490       return 0;
 491     }
 492 }
 493
 494 /* Returns the thread's local storage pointer.  */
 495 static inline void *
 496 __gthread_objc_thread_get_data (void)
 497 {
 498   if (__gthread_active_p ())
 499     return __gthrw_(pthread_getspecific) (_objc_thread_storage);
 500   else
 501     return thread_local_storage;
 502 }
 503
 504 /* Backend mutex functions */
 505
 506 /* Allocate a mutex.  */
 507 static inline int
 508 __gthread_objc_mutex_allocate (objc_mutex_t mutex)
 509 {
 510   if (__gthread_active_p ())
 511     {
 512       mutex->backend = objc_malloc (sizeof (pthread_mutex_t));
 513
 514       if (__gthrw_(pthread_mutex_init) ((pthread_mutex_t *) mutex->backend, NULL))
 515         {
 516           objc_free (mutex->backend);
 517           mutex->backend = NULL;
 518           return -1;
 519         }
 520     }
 521
 522   return 0;
 523 }
 524
 525 /* Deallocate a mutex.  */
 526 static inline int
 527 __gthread_objc_mutex_deallocate (objc_mutex_t mutex)
 528 {
 529   if (__gthread_active_p ())
 530     {
 531       int count;
 532
 533       /*
 534        * Posix Threads specifically require that the thread be unlocked
 535        * for __gthrw_(pthread_mutex_destroy) to work.
 536        */
 537
 538       do
 539         {
 540           count = __gthrw_(pthread_mutex_unlock) ((pthread_mutex_t *) mutex->backend);
 541           if (count < 0)
 542             return -1;
 543         }
 544       while (count);
 545
 546       if (__gthrw_(pthread_mutex_destroy) ((pthread_mutex_t *) mutex->backend))
 547         return -1;
 548
 549       objc_free (mutex->backend);
 550       mutex->backend = NULL;
 551     }
 552   return 0;
 553 }
 554
 555 /* Grab a lock on a mutex.  */
 556 static inline int
 557 __gthread_objc_mutex_lock (objc_mutex_t mutex)
 558 {
 559   if (__gthread_active_p ()
 560       && __gthrw_(pthread_mutex_lock) ((pthread_mutex_t *) mutex->backend) != 0)
 561     {
 562       return -1;
 563     }
 564
 565   return 0;
 566 }
 567
 568 /* Try to grab a lock on a mutex.  */
 569 static inline int
 570 __gthread_objc_mutex_trylock (objc_mutex_t mutex)
 571 {
 572   if (__gthread_active_p ()
 573       && __gthrw_(pthread_mutex_trylock) ((pthread_mutex_t *) mutex->backend) != 0)
 574     {
 575       return -1;
 576     }
 577
 578   return 0;
 579 }
 580
 581 /* Unlock the mutex */
 582 static inline int
 583 __gthread_objc_mutex_unlock (objc_mutex_t mutex)
 584 {
 585   if (__gthread_active_p ()
 586       && __gthrw_(pthread_mutex_unlock) ((pthread_mutex_t *) mutex->backend) != 0)
 587     {
 588       return -1;
 589     }
 590
 591   return 0;
 592 }
 593
 594 /* Backend condition mutex functions */
 595
 596 /* Allocate a condition.  */
 597 static inline int
 598 __gthread_objc_condition_allocate (objc_condition_t condition)
 599 {
 600   if (__gthread_active_p ())
 601     {
 602       condition->backend = objc_malloc (sizeof (pthread_cond_t));
 603
 604       if (__gthrw_(pthread_cond_init) ((pthread_cond_t *) condition->backend, NULL))
 605         {
 606           objc_free (condition->backend);
 607           condition->backend = NULL;
 608           return -1;
 609         }
 610     }
 611
 612   return 0;
 613 }
 614
 615 /* Deallocate a condition.  */
 616 static inline int
 617 __gthread_objc_condition_deallocate (objc_condition_t condition)
 618 {
 619   if (__gthread_active_p ())
 620     {
 621       if (__gthrw_(pthread_cond_destroy) ((pthread_cond_t *) condition->backend))
 622         return -1;
 623
 624       objc_free (condition->backend);
 625       condition->backend = NULL;
 626     }
 627   return 0;
 628 }
 629
 630 /* Wait on the condition */
 631 static inline int
 632 __gthread_objc_condition_wait (objc_condition_t condition, objc_mutex_t mutex)
 633 {
 634   if (__gthread_active_p ())
 635     return __gthrw_(pthread_cond_wait) ((pthread_cond_t *) condition->backend,
 636                               (pthread_mutex_t *) mutex->backend);
 637   else
 638     return 0;
 639 }
 640
 641 /* Wake up all threads waiting on this condition.  */
 642 static inline int
 643 __gthread_objc_condition_broadcast (objc_condition_t condition)
 644 {
 645   if (__gthread_active_p ())
 646     return __gthrw_(pthread_cond_broadcast) ((pthread_cond_t *) condition->backend);
 647   else
 648     return 0;
 649 }
 650
 651 /* Wake up one thread waiting on this condition.  */
 652 static inline int
 653 __gthread_objc_condition_signal (objc_condition_t condition)
 654 {
 655   if (__gthread_active_p ())
 656     return __gthrw_(pthread_cond_signal) ((pthread_cond_t *) condition->backend);
 657   else
 658     return 0;
 659 }
 660
 661 #else /* _LIBOBJC */
 662
 663 static inline int
 664 __gthread_create (__gthread_t *__threadid, void *(*__func) (void*),
 665                   void *__args)
 666 {
 667   return __gthrw_(pthread_create) (__threadid, NULL, __func, __args);
 668 }
 669
 670 static inline int
 671 __gthread_join (__gthread_t __threadid, void **__value_ptr)
 672 {
 673   return __gthrw_(pthread_join) (__threadid, __value_ptr);
 674 }
 675
 676 static inline int
 677 __gthread_detach (__gthread_t __threadid)
 678 {
 679   return __gthrw_(pthread_detach) (__threadid);
 680 }
 681
 682 static inline int
 683 __gthread_equal (__gthread_t __t1, __gthread_t __t2)
 684 {
 685   return __gthrw_(pthread_equal) (__t1, __t2);
 686 }
 687
 688 static inline __gthread_t
 689 __gthread_self (void)
 690 {
 691   return __gthrw_(pthread_self) ();
 692 }
 693
 694 static inline int
 695 __gthread_yield (void)
 696 {
 697   return __gthrw_(sched_yield) ();
 698 }
 699
 700 static inline int
 701 __gthread_once (__gthread_once_t *__once, void (*__func) (void))
 702 {
 703   if (__gthread_active_p ())
 704     return __gthrw_(pthread_once) (__once, __func);
 705   else
 706     return -1;
 707 }
 708
 709 static inline int
 710 __gthread_key_create (__gthread_key_t *__key, void (*__dtor) (void *))
 711 {
 712   return __gthrw_(pthread_key_create) (__key, __dtor);
 713 }
 714
 715 static inline int
 716 __gthread_key_delete (__gthread_key_t __key)
 717 {
 718   return __gthrw_(pthread_key_delete) (__key);
 719 }
 720
 721 static inline void *
 722 __gthread_getspecific (__gthread_key_t __key)
 723 {
 724   return __gthrw_(pthread_getspecific) (__key);
 725 }
 726
 727 static inline int
 728 __gthread_setspecific (__gthread_key_t __key, const void *__ptr)
 729 {
 730   return __gthrw_(pthread_setspecific) (__key, __ptr);
 731 }
 732
 733 static inline int
 734 __gthread_mutex_destroy (__gthread_mutex_t *__mutex)
 735 {
 736   if (__gthread_active_p ())
 737     return __gthrw_(pthread_mutex_destroy) (__mutex);
 738   else
 739     return 0;
 740 }
 741
 742 static inline int
 743 __gthread_mutex_lock (__gthread_mutex_t *__mutex)
 744 {
 745   if (__gthread_active_p ())
 746     return __gthrw_(pthread_mutex_lock) (__mutex);
 747   else
 748     return 0;
 749 }
 750
 751 static inline int
 752 __gthread_mutex_trylock (__gthread_mutex_t *__mutex)
 753 {
 754   if (__gthread_active_p ())
 755     return __gthrw_(pthread_mutex_trylock) (__mutex);
 756   else
 757     return 0;
 758 }
 759
 760 #if _GTHREAD_USE_MUTEX_TIMEDLOCK
 761 static inline int
 762 __gthread_mutex_timedlock (__gthread_mutex_t *__mutex,
 763                            const __gthread_time_t *__abs_timeout)
 764 {
 765   if (__gthread_active_p ())
 766     return __gthrw_(pthread_mutex_timedlock) (__mutex, __abs_timeout);
 767   else
 768     return 0;
 769 }
 770 #endif
 771
 772 static inline int
 773 __gthread_mutex_unlock (__gthread_mutex_t *__mutex)
 774 {
 775   if (__gthread_active_p ())
 776     return __gthrw_(pthread_mutex_unlock) (__mutex);
 777   else
 778     return 0;
 779 }
 780
 781 #ifndef PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP
 782 static inline int
 783 __gthread_recursive_mutex_init_function (__gthread_recursive_mutex_t *__mutex)
 784 {
 785   if (__gthread_active_p ())
 786     {
 787       pthread_mutexattr_t __attr;
 788       int __r;
 789
 790       __r = __gthrw_(pthread_mutexattr_init) (&__attr);
 791       if (!__r)
 792         __r = __gthrw_(pthread_mutexattr_settype) (&__attr,
 793                                                    PTHREAD_MUTEX_RECURSIVE);
 794       if (!__r)
 795         __r = __gthrw_(pthread_mutex_init) (__mutex, &__attr);
 796       if (!__r)
 797         __r = __gthrw_(pthread_mutexattr_destroy) (&__attr);
 798       return __r;
 799     }
 800   return 0;
 801 }
 802 #endif
 803
 804 static inline int
 805 __gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *__mutex)
 806 {
 807   return __gthread_mutex_lock (__mutex);
 808 }
 809
 810 static inline int
 811 __gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *__mutex)
 812 {
 813   return __gthread_mutex_trylock (__mutex);
 814 }
 815
 816 #if _GTHREAD_USE_MUTEX_TIMEDLOCK
 817 static inline int
 818 __gthread_recursive_mutex_timedlock (__gthread_recursive_mutex_t *__mutex,
 819                                      const __gthread_time_t *__abs_timeout)
 820 {
 821   return __gthread_mutex_timedlock (__mutex, __abs_timeout);
 822 }
 823 #endif
 824
 825 static inline int
 826 __gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *__mutex)
 827 {
 828   return __gthread_mutex_unlock (__mutex);
 829 }
 830
 831 static inline int
 832 __gthread_cond_broadcast (__gthread_cond_t *__cond)
 833 {
 834   return __gthrw_(pthread_cond_broadcast) (__cond);
 835 }
 836
 837 static inline int
 838 __gthread_cond_signal (__gthread_cond_t *__cond)
 839 {
 840   return __gthrw_(pthread_cond_signal) (__cond);
 841 }
 842
 843 static inline int
 844 __gthread_cond_wait (__gthread_cond_t *__cond, __gthread_mutex_t *__mutex)
 845 {
 846   return __gthrw_(pthread_cond_wait) (__cond, __mutex);
 847 }
 848
 849 static inline int
 850 __gthread_cond_timedwait (__gthread_cond_t *__cond, __gthread_mutex_t *__mutex,
 851                           const __gthread_time_t *__abs_timeout)
 852 {
 853   return __gthrw_(pthread_cond_timedwait) (__cond, __mutex, __abs_timeout);
 854 }
 855
 856 static inline int
 857 __gthread_cond_wait_recursive (__gthread_cond_t *__cond,
 858                                __gthread_recursive_mutex_t *__mutex)
 859 {
 860   return __gthread_cond_wait (__cond, __mutex);
 861 }
 862
 863 static inline int
 864 __gthread_cond_timedwait_recursive (__gthread_cond_t *__cond,
 865                                     __gthread_recursive_mutex_t *__mutex,
 866                                     const __gthread_time_t *__abs_timeout)
 867 {
 868   return __gthread_cond_timedwait (__cond, __mutex, __abs_timeout);
 869 }
 870
 871 static inline int
 872 __gthread_cond_destroy (__gthread_cond_t* __cond)
 873 {
 874   return __gthrw_(pthread_cond_destroy) (__cond);
 875 }
 876
 877 #endif /* _LIBOBJC */
 878
 879 #endif /* ! GCC_GTHR_POSIX_H */