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