nptl/pthreadP.h

   1 /* Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #ifndef _PTHREADP_H
  21 #define _PTHREADP_H     1
  22
  23 #include <pthread.h>
  24 #include <setjmp.h>
  25 #include <stdbool.h>
  26 #include <sys/syscall.h>
  27 #include "descr.h"
  28 #include <tls.h>
  29 #include <lowlevellock.h>
  30 #include <stackinfo.h>
  31 #include <internaltypes.h>
  32 #include <pthread-functions.h>
  33 #include <atomic.h>
  34 #include <kernel-features.h>
  35
  36
  37 /* Atomic operations on TLS memory.  */
  38 #ifndef THREAD_ATOMIC_CMPXCHG_VAL
  39 # define THREAD_ATOMIC_CMPXCHG_VAL(descr, member, new, old) \
  40   atomic_compare_and_exchange_val_acq (&(descr)->member, new, old)
  41 #endif
  42
  43 #ifndef THREAD_ATOMIC_BIT_SET
  44 # define THREAD_ATOMIC_BIT_SET(descr, member, bit) \
  45   atomic_bit_set (&(descr)->member, bit)
  46 #endif
  47
  48
  49 /* Adaptive mutex definitions.  */
  50 #ifndef MAX_ADAPTIVE_COUNT
  51 # define MAX_ADAPTIVE_COUNT 100
  52 #endif
  53
  54
  55 /* Magic cookie representing robust mutex with dead owner.  */
  56 #define PTHREAD_MUTEX_INCONSISTENT      INT_MAX
  57 /* Magic cookie representing not recoverable robust mutex.  */
  58 #define PTHREAD_MUTEX_NOTRECOVERABLE    (INT_MAX - 1)
  59
  60
  61 /* Internal mutex type value.  */
  62 enum
  63 {
  64   PTHREAD_MUTEX_KIND_MASK_NP = 3,
  65   PTHREAD_MUTEX_ROBUST_NORMAL_NP = 16,
  66   PTHREAD_MUTEX_ROBUST_RECURSIVE_NP
  67   = PTHREAD_MUTEX_ROBUST_NORMAL_NP | PTHREAD_MUTEX_RECURSIVE_NP,
  68   PTHREAD_MUTEX_ROBUST_ERRORCHECK_NP
  69   = PTHREAD_MUTEX_ROBUST_NORMAL_NP | PTHREAD_MUTEX_ERRORCHECK_NP,
  70   PTHREAD_MUTEX_ROBUST_ADAPTIVE_NP
  71   = PTHREAD_MUTEX_ROBUST_NORMAL_NP | PTHREAD_MUTEX_ADAPTIVE_NP,
  72   PTHREAD_MUTEX_PRIO_INHERIT_NP = 32,
  73   PTHREAD_MUTEX_PI_NORMAL_NP
  74   = PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_NORMAL,
  75   PTHREAD_MUTEX_PI_RECURSIVE_NP
  76   = PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_RECURSIVE_NP,
  77   PTHREAD_MUTEX_PI_ERRORCHECK_NP
  78   = PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ERRORCHECK_NP,
  79   PTHREAD_MUTEX_PI_ADAPTIVE_NP
  80   = PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ADAPTIVE_NP,
  81   PTHREAD_MUTEX_PI_ROBUST_NORMAL_NP
  82   = PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ROBUST_NORMAL_NP,
  83   PTHREAD_MUTEX_PI_ROBUST_RECURSIVE_NP
  84   = PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ROBUST_RECURSIVE_NP,
  85   PTHREAD_MUTEX_PI_ROBUST_ERRORCHECK_NP
  86   = PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ROBUST_ERRORCHECK_NP,
  87   PTHREAD_MUTEX_PI_ROBUST_ADAPTIVE_NP
  88   = PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ROBUST_ADAPTIVE_NP,
  89   PTHREAD_MUTEX_PRIO_PROTECT_NP = 64,
  90   PTHREAD_MUTEX_PP_NORMAL_NP
  91   = PTHREAD_MUTEX_PRIO_PROTECT_NP | PTHREAD_MUTEX_NORMAL,
  92   PTHREAD_MUTEX_PP_RECURSIVE_NP
  93   = PTHREAD_MUTEX_PRIO_PROTECT_NP | PTHREAD_MUTEX_RECURSIVE_NP,
  94   PTHREAD_MUTEX_PP_ERRORCHECK_NP
  95   = PTHREAD_MUTEX_PRIO_PROTECT_NP | PTHREAD_MUTEX_ERRORCHECK_NP,
  96   PTHREAD_MUTEX_PP_ADAPTIVE_NP
  97   = PTHREAD_MUTEX_PRIO_PROTECT_NP | PTHREAD_MUTEX_ADAPTIVE_NP
  98 };
  99
 100 /* Ceiling in __data.__lock.  __data.__lock is signed, so don't
 101    use the MSB bit in there, but in the mask also include that bit,
 102    so that the compiler can optimize & PTHREAD_MUTEX_PRIO_CEILING_MASK
 103    masking if the value is then shifted down by
 104    PTHREAD_MUTEX_PRIO_CEILING_SHIFT.  */
 105 #define PTHREAD_MUTEX_PRIO_CEILING_SHIFT        19
 106 #define PTHREAD_MUTEX_PRIO_CEILING_MASK         0xfff80000
 107
 108
 109 /* Flags in mutex attr.  */
 110 #define PTHREAD_MUTEXATTR_PROTOCOL_SHIFT        28
 111 #define PTHREAD_MUTEXATTR_PROTOCOL_MASK         0x30000000
 112 #define PTHREAD_MUTEXATTR_PRIO_CEILING_SHIFT    12
 113 #define PTHREAD_MUTEXATTR_PRIO_CEILING_MASK     0x00fff000
 114 #define PTHREAD_MUTEXATTR_FLAG_ROBUST           0x40000000
 115 #define PTHREAD_MUTEXATTR_FLAG_PSHARED          0x80000000
 116 #define PTHREAD_MUTEXATTR_FLAG_BITS \
 117   (PTHREAD_MUTEXATTR_FLAG_ROBUST | PTHREAD_MUTEXATTR_FLAG_PSHARED \
 118    | PTHREAD_MUTEXATTR_PROTOCOL_MASK | PTHREAD_MUTEXATTR_PRIO_CEILING_MASK)
 119
 120
 121 /* Bits used in robust mutex implementation.  */
 122 #define FUTEX_WAITERS           0x80000000
 123 #define FUTEX_OWNER_DIED        0x40000000
 124 #define FUTEX_TID_MASK          0x3fffffff
 125
 126
 127 /* Internal variables.  */
 128
 129
 130 /* Default stack size.  */
 131 extern size_t __default_stacksize attribute_hidden;
 132
 133 /* Size and alignment of static TLS block.  */
 134 extern size_t __static_tls_size attribute_hidden;
 135 extern size_t __static_tls_align_m1 attribute_hidden;
 136
 137 /* Flag whether the machine is SMP or not.  */
 138 extern int __is_smp attribute_hidden;
 139
 140 /* Thread descriptor handling.  */
 141 extern list_t __stack_user;
 142 hidden_proto (__stack_user)
 143
 144 /* Attribute handling.  */
 145 extern struct pthread_attr *__attr_list attribute_hidden;
 146 extern lll_lock_t __attr_list_lock attribute_hidden;
 147
 148 /* First available RT signal.  */
 149 extern int __current_sigrtmin attribute_hidden;
 150 /* Last available RT signal.  */
 151 extern int __current_sigrtmax attribute_hidden;
 152
 153 /* Concurrency handling.  */
 154 extern int __concurrency_level attribute_hidden;
 155
 156 /* Thread-local data key handling.  */
 157 extern struct pthread_key_struct __pthread_keys[PTHREAD_KEYS_MAX];
 158 hidden_proto (__pthread_keys)
 159
 160 /* Number of threads running.  */
 161 extern unsigned int __nptl_nthreads attribute_hidden;
 162
 163 #ifndef __ASSUME_SET_ROBUST_LIST
 164 /* Negative if we do not have the system call and we can use it.  */
 165 extern int __set_robust_list_avail attribute_hidden;
 166 #endif
 167
 168 /* Thread Priority Protection.  */
 169 extern int __sched_fifo_min_prio attribute_hidden;
 170 extern int __sched_fifo_max_prio attribute_hidden;
 171 extern void __init_sched_fifo_prio (void) attribute_hidden;
 172 extern int __pthread_tpp_change_priority (int prev_prio, int new_prio)
 173      attribute_hidden;
 174 extern int __pthread_current_priority (void) attribute_hidden;
 175
 176 /* The library can run in debugging mode where it performs a lot more
 177    tests.  */
 178 extern int __pthread_debug attribute_hidden;
 179 /** For now disable debugging support.  */
 180 #if 0
 181 # define DEBUGGING_P __builtin_expect (__pthread_debug, 0)
 182 # define INVALID_TD_P(pd) (DEBUGGING_P && __find_in_stack_list (pd) == NULL)
 183 # define INVALID_NOT_TERMINATED_TD_P(pd) INVALID_TD_P (pd)
 184 #else
 185 # define DEBUGGING_P 0
 186 /* Simplified test.  This will not catch all invalid descriptors but
 187    is better than nothing.  And if the test triggers the thread
 188    descriptor is guaranteed to be invalid.  */
 189 # define INVALID_TD_P(pd) __builtin_expect ((pd)->tid <= 0, 0)
 190 # define INVALID_NOT_TERMINATED_TD_P(pd) __builtin_expect ((pd)->tid < 0, 0)
 191 #endif
 192
 193
 194 /* Cancellation test.  */
 195 #define CANCELLATION_P(self) \
 196   do {                                                                        \
 197     int cancelhandling = THREAD_GETMEM (self, cancelhandling);                \
 198     if (CANCEL_ENABLED_AND_CANCELED (cancelhandling))                         \
 199       {                                                                       \
 200         THREAD_SETMEM (self, result, PTHREAD_CANCELED);                       \
 201         __do_cancel ();                                                       \
 202       }                                                                       \
 203   } while (0)
 204
 205
 206 extern void __pthread_unwind (__pthread_unwind_buf_t *__buf)
 207      __cleanup_fct_attribute __attribute ((__noreturn__))
 208 #if !defined SHARED && !defined IS_IN_libpthread
 209      weak_function
 210 #endif
 211      ;
 212 extern void __pthread_unwind_next (__pthread_unwind_buf_t *__buf)
 213      __cleanup_fct_attribute __attribute ((__noreturn__))
 214 #ifndef SHARED
 215      weak_function
 216 #endif
 217      ;
 218 extern void __pthread_register_cancel (__pthread_unwind_buf_t *__buf)
 219      __cleanup_fct_attribute;
 220 extern void __pthread_unregister_cancel (__pthread_unwind_buf_t *__buf)
 221      __cleanup_fct_attribute;
 222 #if defined NOT_IN_libc && defined IS_IN_libpthread
 223 hidden_proto (__pthread_unwind)
 224 hidden_proto (__pthread_unwind_next)
 225 hidden_proto (__pthread_register_cancel)
 226 hidden_proto (__pthread_unregister_cancel)
 227 # ifdef SHARED
 228 extern void attribute_hidden pthread_cancel_init (void);
 229 # endif
 230 #endif
 231
 232
 233 /* Called when a thread reacts on a cancellation request.  */
 234 static inline void
 235 __attribute ((noreturn, always_inline))
 236 __do_cancel (void)
 237 {
 238   struct pthread *self = THREAD_SELF;
 239
 240   /* Make sure we get no more cancellations.  */
 241   THREAD_ATOMIC_BIT_SET (self, cancelhandling, EXITING_BIT);
 242
 243   __pthread_unwind ((__pthread_unwind_buf_t *)
 244                     THREAD_GETMEM (self, cleanup_jmp_buf));
 245 }
 246
 247
 248 /* Set cancellation mode to asynchronous.  */
 249 #define CANCEL_ASYNC() \
 250   __pthread_enable_asynccancel ()
 251 /* Reset to previous cancellation mode.  */
 252 #define CANCEL_RESET(oldtype) \
 253   __pthread_disable_asynccancel (oldtype)
 254
 255 #if !defined NOT_IN_libc
 256 /* Same as CANCEL_ASYNC, but for use in libc.so.  */
 257 # define LIBC_CANCEL_ASYNC() \
 258   __libc_enable_asynccancel ()
 259 /* Same as CANCEL_RESET, but for use in libc.so.  */
 260 # define LIBC_CANCEL_RESET(oldtype) \
 261   __libc_disable_asynccancel (oldtype)
 262 # define LIBC_CANCEL_HANDLED() \
 263   __asm (".globl " __SYMBOL_PREFIX "__libc_enable_asynccancel"); \
 264   __asm (".globl " __SYMBOL_PREFIX "__libc_disable_asynccancel")
 265 #elif defined NOT_IN_libc && defined IS_IN_libpthread
 266 # define LIBC_CANCEL_ASYNC() CANCEL_ASYNC ()
 267 # define LIBC_CANCEL_RESET(val) CANCEL_RESET (val)
 268 # define LIBC_CANCEL_HANDLED() \
 269   __asm (".globl " __SYMBOL_PREFIX "__pthread_enable_asynccancel"); \
 270   __asm (".globl " __SYMBOL_PREFIX "__pthread_disable_asynccancel")
 271 #elif defined NOT_IN_libc && defined IS_IN_librt
 272 # define LIBC_CANCEL_ASYNC() \
 273   __librt_enable_asynccancel ()
 274 # define LIBC_CANCEL_RESET(val) \
 275   __librt_disable_asynccancel (val)
 276 # define LIBC_CANCEL_HANDLED() \
 277   __asm (".globl " __SYMBOL_PREFIX "__librt_enable_asynccancel"); \
 278   __asm (".globl " __SYMBOL_PREFIX "__librt_disable_asynccancel")
 279 #else
 280 # define LIBC_CANCEL_ASYNC()    0 /* Just a dummy value.  */
 281 # define LIBC_CANCEL_RESET(val) ((void)(val)) /* Nothing, but evaluate it.  */
 282 # define LIBC_CANCEL_HANDLED()  /* Nothing.  */
 283 #endif
 284
 285 /* The signal used for asynchronous cancelation.  */
 286 #define SIGCANCEL       __SIGRTMIN
 287
 288
 289 /* Signal needed for the kernel-supported POSIX timer implementation.
 290    We can reuse the cancellation signal since we can distinguish
 291    cancellation from timer expirations.  */
 292 #define SIGTIMER        SIGCANCEL
 293
 294
 295 /* Signal used to implement the setuid et.al. functions.  */
 296 #define SIGSETXID       (__SIGRTMIN + 1)
 297
 298 /* Used to communicate with signal handler.  */
 299 extern struct xid_command *__xidcmd attribute_hidden;
 300
 301
 302 /* Internal prototypes.  */
 303
 304 /* Thread list handling.  */
 305 extern struct pthread *__find_in_stack_list (struct pthread *pd)
 306      attribute_hidden internal_function;
 307
 308 /* Deallocate a thread's stack after optionally making sure the thread
 309    descriptor is still valid.  */
 310 extern void __free_tcb (struct pthread *pd) attribute_hidden internal_function;
 311
 312 /* Free allocated stack.  */
 313 extern void __deallocate_stack (struct pthread *pd)
 314      attribute_hidden internal_function;
 315
 316 /* Mark all the stacks except for the current one as available.  This
 317    function also re-initializes the lock for the stack cache.  */
 318 extern void __reclaim_stacks (void) attribute_hidden;
 319
 320 /* Make all threads's stacks executable.  */
 321 extern int __make_stacks_executable (void **stack_endp)
 322      internal_function attribute_hidden;
 323
 324 /* longjmp handling.  */
 325 extern void __pthread_cleanup_upto (__jmp_buf target, char *targetframe);
 326 #if defined NOT_IN_libc && defined IS_IN_libpthread
 327 hidden_proto (__pthread_cleanup_upto)
 328 #endif
 329
 330
 331 /* Functions with versioned interfaces.  */
 332 extern int __pthread_create_2_1 (pthread_t *newthread,
 333                                  const pthread_attr_t *attr,
 334                                  void *(*start_routine) (void *), void *arg);
 335 extern int __pthread_create_2_0 (pthread_t *newthread,
 336                                  const pthread_attr_t *attr,
 337                                  void *(*start_routine) (void *), void *arg);
 338 extern int __pthread_attr_init_2_1 (pthread_attr_t *attr);
 339 extern int __pthread_attr_init_2_0 (pthread_attr_t *attr);
 340
 341
 342 /* Event handlers for libthread_db interface.  */
 343 extern void __nptl_create_event (void);
 344 extern void __nptl_death_event (void);
 345 hidden_proto (__nptl_create_event)
 346 hidden_proto (__nptl_death_event)
 347
 348 /* Register the generation counter in the libpthread with the libc.  */
 349 #ifdef TLS_MULTIPLE_THREADS_IN_TCB
 350 extern void __libc_pthread_init (unsigned long int *ptr,
 351                                  void (*reclaim) (void),
 352                                  const struct pthread_functions *functions)
 353      internal_function;
 354 #else
 355 extern int *__libc_pthread_init (unsigned long int *ptr,
 356                                  void (*reclaim) (void),
 357                                  const struct pthread_functions *functions)
 358      internal_function;
 359
 360 /* Variable set to a nonzero value if more than one thread runs or ran.  */
 361 extern int __pthread_multiple_threads attribute_hidden;
 362 /* Pointer to the corresponding variable in libc.  */
 363 extern int *__libc_multiple_threads_ptr attribute_hidden;
 364 #endif
 365
 366 /* Find a thread given its TID.  */
 367 extern struct pthread *__find_thread_by_id (pid_t tid) attribute_hidden
 368 #ifdef SHARED
 369 ;
 370 #else
 371 weak_function;
 372 #define __find_thread_by_id(tid) \
 373   (__find_thread_by_id ? (__find_thread_by_id) (tid) : (struct pthread *) NULL)
 374 #endif
 375
 376 extern void __pthread_init_static_tls (struct link_map *) attribute_hidden;
 377
 378
 379 /* Namespace save aliases.  */
 380 extern int __pthread_getschedparam (pthread_t thread_id, int *policy,
 381                                     struct sched_param *param);
 382 extern int __pthread_setschedparam (pthread_t thread_id, int policy,
 383                                     const struct sched_param *param);
 384 extern int __pthread_setcancelstate (int state, int *oldstate);
 385 extern int __pthread_mutex_init (pthread_mutex_t *__mutex,
 386                                  __const pthread_mutexattr_t *__mutexattr);
 387 extern int __pthread_mutex_init_internal (pthread_mutex_t *__mutex,
 388                                           __const pthread_mutexattr_t *__mutexattr)
 389      attribute_hidden;
 390 extern int __pthread_mutex_destroy (pthread_mutex_t *__mutex);
 391 extern int __pthread_mutex_destroy_internal (pthread_mutex_t *__mutex)
 392      attribute_hidden;
 393 extern int __pthread_mutex_trylock (pthread_mutex_t *_mutex);
 394 extern int __pthread_mutex_lock (pthread_mutex_t *__mutex);
 395 extern int __pthread_mutex_lock_internal (pthread_mutex_t *__mutex)
 396      attribute_hidden;
 397 extern int __pthread_mutex_cond_lock (pthread_mutex_t *__mutex)
 398      attribute_hidden internal_function;
 399 extern int __pthread_mutex_unlock (pthread_mutex_t *__mutex);
 400 extern int __pthread_mutex_unlock_internal (pthread_mutex_t *__mutex)
 401      attribute_hidden;
 402 extern int __pthread_mutex_unlock_usercnt (pthread_mutex_t *__mutex,
 403                                            int __decr)
 404      attribute_hidden internal_function;
 405 extern int __pthread_mutexattr_init (pthread_mutexattr_t *attr);
 406 extern int __pthread_mutexattr_destroy (pthread_mutexattr_t *attr);
 407 extern int __pthread_mutexattr_settype (pthread_mutexattr_t *attr, int kind);
 408 extern int __pthread_attr_destroy (pthread_attr_t *attr);
 409 extern int __pthread_attr_getdetachstate (const pthread_attr_t *attr,
 410                                           int *detachstate);
 411 extern int __pthread_attr_setdetachstate (pthread_attr_t *attr,
 412                                           int detachstate);
 413 extern int __pthread_attr_getinheritsched (const pthread_attr_t *attr,
 414                                            int *inherit);
 415 extern int __pthread_attr_setinheritsched (pthread_attr_t *attr, int inherit);
 416 extern int __pthread_attr_getschedparam (const pthread_attr_t *attr,
 417                                          struct sched_param *param);
 418 extern int __pthread_attr_setschedparam (pthread_attr_t *attr,
 419                                          const struct sched_param *param);
 420 extern int __pthread_attr_getschedpolicy (const pthread_attr_t *attr,
 421                                           int *policy);
 422 extern int __pthread_attr_setschedpolicy (pthread_attr_t *attr, int policy);
 423 extern int __pthread_attr_getscope (const pthread_attr_t *attr, int *scope);
 424 extern int __pthread_attr_setscope (pthread_attr_t *attr, int scope);
 425 extern int __pthread_attr_getstackaddr (__const pthread_attr_t *__restrict
 426                                         __attr, void **__restrict __stackaddr);
 427 extern int __pthread_attr_setstackaddr (pthread_attr_t *__attr,
 428                                         void *__stackaddr);
 429 extern int __pthread_attr_getstacksize (__const pthread_attr_t *__restrict
 430                                         __attr,
 431                                         size_t *__restrict __stacksize);
 432 extern int __pthread_attr_setstacksize (pthread_attr_t *__attr,
 433                                         size_t __stacksize);
 434 extern int __pthread_attr_getstack (__const pthread_attr_t *__restrict __attr,
 435                                     void **__restrict __stackaddr,
 436                                     size_t *__restrict __stacksize);
 437 extern int __pthread_attr_setstack (pthread_attr_t *__attr, void *__stackaddr,
 438                                     size_t __stacksize);
 439 extern int __pthread_rwlock_init (pthread_rwlock_t *__restrict __rwlock,
 440                                   __const pthread_rwlockattr_t *__restrict
 441                                   __attr);
 442 extern int __pthread_rwlock_destroy (pthread_rwlock_t *__rwlock);
 443 extern int __pthread_rwlock_rdlock (pthread_rwlock_t *__rwlock);
 444 extern int __pthread_rwlock_rdlock_internal (pthread_rwlock_t *__rwlock);
 445 extern int __pthread_rwlock_tryrdlock (pthread_rwlock_t *__rwlock);
 446 extern int __pthread_rwlock_wrlock (pthread_rwlock_t *__rwlock);
 447 extern int __pthread_rwlock_wrlock_internal (pthread_rwlock_t *__rwlock);
 448 extern int __pthread_rwlock_trywrlock (pthread_rwlock_t *__rwlock);
 449 extern int __pthread_rwlock_unlock (pthread_rwlock_t *__rwlock);
 450 extern int __pthread_rwlock_unlock_internal (pthread_rwlock_t *__rwlock);
 451 extern int __pthread_cond_broadcast (pthread_cond_t *cond);
 452 extern int __pthread_cond_destroy (pthread_cond_t *cond);
 453 extern int __pthread_cond_init (pthread_cond_t *cond,
 454                                 const pthread_condattr_t *cond_attr);
 455 extern int __pthread_cond_signal (pthread_cond_t *cond);
 456 extern int __pthread_cond_wait (pthread_cond_t *cond, pthread_mutex_t *mutex);
 457 extern int __pthread_cond_timedwait (pthread_cond_t *cond,
 458                                      pthread_mutex_t *mutex,
 459                                      const struct timespec *abstime);
 460 extern int __pthread_condattr_destroy (pthread_condattr_t *attr);
 461 extern int __pthread_condattr_init (pthread_condattr_t *attr);
 462 extern int __pthread_key_create (pthread_key_t *key, void (*destr) (void *));
 463 extern int __pthread_key_create_internal (pthread_key_t *key,
 464                                           void (*destr) (void *));
 465 extern void *__pthread_getspecific (pthread_key_t key);
 466 extern void *__pthread_getspecific_internal (pthread_key_t key);
 467 extern int __pthread_setspecific (pthread_key_t key, const void *value);
 468 extern int __pthread_setspecific_internal (pthread_key_t key,
 469                                            const void *value);
 470 extern int __pthread_once (pthread_once_t *once_control,
 471                            void (*init_routine) (void));
 472 extern int __pthread_once_internal (pthread_once_t *once_control,
 473                                     void (*init_routine) (void));
 474 extern int __pthread_atfork (void (*prepare) (void), void (*parent) (void),
 475                              void (*child) (void));
 476 extern pthread_t __pthread_self (void);
 477 extern int __pthread_equal (pthread_t thread1, pthread_t thread2);
 478 extern int __pthread_kill (pthread_t threadid, int signo);
 479 extern void __pthread_exit (void *value);
 480 extern int __pthread_setcanceltype (int type, int *oldtype);
 481 extern int __pthread_enable_asynccancel (void) attribute_hidden;
 482 extern void __pthread_disable_asynccancel (int oldtype)
 483      internal_function attribute_hidden;
 484
 485 extern int __pthread_cond_broadcast_2_0 (pthread_cond_2_0_t *cond);
 486 extern int __pthread_cond_destroy_2_0 (pthread_cond_2_0_t *cond);
 487 extern int __pthread_cond_init_2_0 (pthread_cond_2_0_t *cond,
 488                                     const pthread_condattr_t *cond_attr);
 489 extern int __pthread_cond_signal_2_0 (pthread_cond_2_0_t *cond);
 490 extern int __pthread_cond_timedwait_2_0 (pthread_cond_2_0_t *cond,
 491                                          pthread_mutex_t *mutex,
 492                                          const struct timespec *abstime);
 493 extern int __pthread_cond_wait_2_0 (pthread_cond_2_0_t *cond,
 494                                     pthread_mutex_t *mutex);
 495
 496 extern int __pthread_getaffinity_np (pthread_t th, size_t cpusetsize,
 497                                      cpu_set_t *cpuset);
 498
 499 /* The two functions are in libc.so and not exported.  */
 500 extern int __libc_enable_asynccancel (void) attribute_hidden;
 501 extern void __libc_disable_asynccancel (int oldtype)
 502      internal_function attribute_hidden;
 503
 504
 505 /* The two functions are in librt.so and not exported.  */
 506 extern int __librt_enable_asynccancel (void) attribute_hidden;
 507 extern void __librt_disable_asynccancel (int oldtype)
 508      internal_function attribute_hidden;
 509
 510 #ifdef IS_IN_libpthread
 511 /* Special versions which use non-exported functions.  */
 512 extern void __pthread_cleanup_push (struct _pthread_cleanup_buffer *buffer,
 513                                     void (*routine) (void *), void *arg)
 514      attribute_hidden;
 515 # undef pthread_cleanup_push
 516 # define pthread_cleanup_push(routine,arg) \
 517   { struct _pthread_cleanup_buffer _buffer;                                   \
 518     __pthread_cleanup_push (&_buffer, (routine), (arg));
 519
 520 extern void __pthread_cleanup_pop (struct _pthread_cleanup_buffer *buffer,
 521                                    int execute) attribute_hidden;
 522 # undef pthread_cleanup_pop
 523 # define pthread_cleanup_pop(execute) \
 524     __pthread_cleanup_pop (&_buffer, (execute)); }
 525 #endif
 526
 527 extern void __pthread_cleanup_push_defer (struct _pthread_cleanup_buffer *buffer,
 528                                           void (*routine) (void *), void *arg);
 529 extern void __pthread_cleanup_pop_restore (struct _pthread_cleanup_buffer *buffer,
 530                                            int execute);
 531
 532 /* Old cleanup interfaces, still used in libc.so.  */
 533 extern void _pthread_cleanup_push (struct _pthread_cleanup_buffer *buffer,
 534                                    void (*routine) (void *), void *arg);
 535 extern void _pthread_cleanup_pop (struct _pthread_cleanup_buffer *buffer,
 536                                   int execute);
 537 extern void _pthread_cleanup_push_defer (struct _pthread_cleanup_buffer *buffer,
 538                                          void (*routine) (void *), void *arg);
 539 extern void _pthread_cleanup_pop_restore (struct _pthread_cleanup_buffer *buffer,
 540                                           int execute);
 541
 542 extern void __nptl_deallocate_tsd (void) attribute_hidden;
 543
 544 extern int __nptl_setxid (struct xid_command *cmdp) attribute_hidden;
 545
 546 extern void __free_stack_cache (void) attribute_hidden;
 547
 548 #ifdef SHARED
 549 # define PTHREAD_STATIC_FN_REQUIRE(name)
 550 #else
 551 # define PTHREAD_STATIC_FN_REQUIRE(name) __asm (".globl " #name);
 552 #endif
 553
 554
 555 #ifndef __NR_set_robust_list
 556 /* XXX For the time being...  Once we can rely on the kernel headers
 557    having the definition remove these lines.  */
 558 # if defined __i386__
 559 #  define __NR_set_robust_list  311
 560 # elif defined __x86_64__
 561 #  define __NR_set_robust_list  273
 562 # endif
 563 #endif
 564
 565 #endif  /* pthreadP.h */