libpthread/nptl/pthreadP.h

   1 /* Copyright (C) 2002-2007, 2009 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, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #ifndef _PTHREADP_H
  20 #define _PTHREADP_H     1
  21
  22 #include <pthread.h>
  23 #include <setjmp.h>
  24 #include <stdbool.h>
  25 #include <sys/syscall.h>
  26 #include "descr.h"
  27 #include <tls.h>
  28 #include <lowlevellock.h>
  29 #include <bits/stackinfo.h>
  30 #include <internaltypes.h>
  31 #include <atomic.h>
  32 #include <bits/kernel-features.h>
  33
  34
  35 /* Atomic operations on TLS memory.  */
  36 #ifndef THREAD_ATOMIC_CMPXCHG_VAL
  37 # define THREAD_ATOMIC_CMPXCHG_VAL(descr, member, new, old) \
  38   atomic_compare_and_exchange_val_acq (&(descr)->member, new, old)
  39 #endif
  40
  41 #ifndef THREAD_ATOMIC_BIT_SET
  42 # define THREAD_ATOMIC_BIT_SET(descr, member, bit) \
  43   atomic_bit_set (&(descr)->member, bit)
  44 #endif
  45
  46
  47 /* Adaptive mutex definitions.  */
  48 #ifndef MAX_ADAPTIVE_COUNT
  49 # define MAX_ADAPTIVE_COUNT 100
  50 #endif
  51
  52
  53 /* Magic cookie representing robust mutex with dead owner.  */
  54 #define PTHREAD_MUTEX_INCONSISTENT      INT_MAX
  55 /* Magic cookie representing not recoverable robust mutex.  */
  56 #define PTHREAD_MUTEX_NOTRECOVERABLE    (INT_MAX - 1)
  57
  58
  59 /* Internal mutex type value.  */
  60 enum
  61 {
  62   PTHREAD_MUTEX_KIND_MASK_NP = 3,
  63   PTHREAD_MUTEX_ROBUST_NORMAL_NP = 16,
  64   PTHREAD_MUTEX_ROBUST_RECURSIVE_NP
  65   = PTHREAD_MUTEX_ROBUST_NORMAL_NP | PTHREAD_MUTEX_RECURSIVE_NP,
  66   PTHREAD_MUTEX_ROBUST_ERRORCHECK_NP
  67   = PTHREAD_MUTEX_ROBUST_NORMAL_NP | PTHREAD_MUTEX_ERRORCHECK_NP,
  68   PTHREAD_MUTEX_ROBUST_ADAPTIVE_NP
  69   = PTHREAD_MUTEX_ROBUST_NORMAL_NP | PTHREAD_MUTEX_ADAPTIVE_NP,
  70   PTHREAD_MUTEX_PRIO_INHERIT_NP = 32,
  71   PTHREAD_MUTEX_PI_NORMAL_NP
  72   = PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_NORMAL,
  73   PTHREAD_MUTEX_PI_RECURSIVE_NP
  74   = PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_RECURSIVE_NP,
  75   PTHREAD_MUTEX_PI_ERRORCHECK_NP
  76   = PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ERRORCHECK_NP,
  77   PTHREAD_MUTEX_PI_ADAPTIVE_NP
  78   = PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ADAPTIVE_NP,
  79   PTHREAD_MUTEX_PI_ROBUST_NORMAL_NP
  80   = PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ROBUST_NORMAL_NP,
  81   PTHREAD_MUTEX_PI_ROBUST_RECURSIVE_NP
  82   = PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ROBUST_RECURSIVE_NP,
  83   PTHREAD_MUTEX_PI_ROBUST_ERRORCHECK_NP
  84   = PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ROBUST_ERRORCHECK_NP,
  85   PTHREAD_MUTEX_PI_ROBUST_ADAPTIVE_NP
  86   = PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ROBUST_ADAPTIVE_NP,
  87   PTHREAD_MUTEX_PRIO_PROTECT_NP = 64,
  88   PTHREAD_MUTEX_PP_NORMAL_NP
  89   = PTHREAD_MUTEX_PRIO_PROTECT_NP | PTHREAD_MUTEX_NORMAL,
  90   PTHREAD_MUTEX_PP_RECURSIVE_NP
  91   = PTHREAD_MUTEX_PRIO_PROTECT_NP | PTHREAD_MUTEX_RECURSIVE_NP,
  92   PTHREAD_MUTEX_PP_ERRORCHECK_NP
  93   = PTHREAD_MUTEX_PRIO_PROTECT_NP | PTHREAD_MUTEX_ERRORCHECK_NP,
  94   PTHREAD_MUTEX_PP_ADAPTIVE_NP
  95   = PTHREAD_MUTEX_PRIO_PROTECT_NP | PTHREAD_MUTEX_ADAPTIVE_NP
  96 };
  97 #define PTHREAD_MUTEX_PSHARED_BIT 128
  98
  99 #define PTHREAD_MUTEX_TYPE(m) \
 100   ((m)->__data.__kind & 127)
 101
 102 #if LLL_PRIVATE == 0 && LLL_SHARED == 128
 103 # define PTHREAD_MUTEX_PSHARED(m) \
 104   ((m)->__data.__kind & 128)
 105 #else
 106 # define PTHREAD_MUTEX_PSHARED(m) \
 107   (((m)->__data.__kind & 128) ? LLL_SHARED : LLL_PRIVATE)
 108 #endif
 109
 110 /* The kernel when waking robust mutexes on exit never uses
 111    FUTEX_PRIVATE_FLAG FUTEX_WAKE.  */
 112 #define PTHREAD_ROBUST_MUTEX_PSHARED(m) LLL_SHARED
 113
 114 /* Ceiling in __data.__lock.  __data.__lock is signed, so don't
 115    use the MSB bit in there, but in the mask also include that bit,
 116    so that the compiler can optimize & PTHREAD_MUTEX_PRIO_CEILING_MASK
 117    masking if the value is then shifted down by
 118    PTHREAD_MUTEX_PRIO_CEILING_SHIFT.  */
 119 #define PTHREAD_MUTEX_PRIO_CEILING_SHIFT        19
 120 #define PTHREAD_MUTEX_PRIO_CEILING_MASK         0xfff80000
 121
 122
 123 /* Flags in mutex attr.  */
 124 #define PTHREAD_MUTEXATTR_PROTOCOL_SHIFT        28
 125 #define PTHREAD_MUTEXATTR_PROTOCOL_MASK         0x30000000
 126 #define PTHREAD_MUTEXATTR_PRIO_CEILING_SHIFT    12
 127 #define PTHREAD_MUTEXATTR_PRIO_CEILING_MASK     0x00fff000
 128 #define PTHREAD_MUTEXATTR_FLAG_ROBUST           0x40000000
 129 #define PTHREAD_MUTEXATTR_FLAG_PSHARED          0x80000000
 130 #define PTHREAD_MUTEXATTR_FLAG_BITS \
 131   (PTHREAD_MUTEXATTR_FLAG_ROBUST | PTHREAD_MUTEXATTR_FLAG_PSHARED \
 132    | PTHREAD_MUTEXATTR_PROTOCOL_MASK | PTHREAD_MUTEXATTR_PRIO_CEILING_MASK)
 133
 134
 135 /* Check whether rwlock prefers readers.   */
 136 #define PTHREAD_RWLOCK_PREFER_READER_P(rwlock) \
 137   ((rwlock)->__data.__flags == 0)
 138
 139
 140 /* Bits used in robust mutex implementation.  */
 141 #define FUTEX_WAITERS           0x80000000
 142 #define FUTEX_OWNER_DIED        0x40000000
 143 #define FUTEX_TID_MASK          0x3fffffff
 144
 145
 146 /* Internal variables.  */
 147
 148
 149 /* Default stack size.  */
 150 extern size_t __default_stacksize attribute_hidden;
 151
 152 /* Size and alignment of static TLS block.  */
 153 extern size_t __static_tls_size attribute_hidden;
 154 extern size_t __static_tls_align_m1 attribute_hidden;
 155
 156 /* Flag whether the machine is SMP or not.  */
 157 extern int __is_smp attribute_hidden;
 158
 159 /* Thread descriptor handling.  */
 160 extern list_t __stack_user;
 161 hidden_proto (__stack_user)
 162
 163 /* Attribute handling.  */
 164 extern struct pthread_attr *__attr_list attribute_hidden;
 165 extern int __attr_list_lock attribute_hidden;
 166
 167 /* First available RT signal.  */
 168 extern int __current_sigrtmin attribute_hidden;
 169 /* Last available RT signal.  */
 170 extern int __current_sigrtmax attribute_hidden;
 171
 172 /* Concurrency handling.  */
 173 extern int __concurrency_level attribute_hidden;
 174
 175 /* Thread-local data key handling.  */
 176 extern struct pthread_key_struct __pthread_keys[PTHREAD_KEYS_MAX];
 177 hidden_proto (__pthread_keys)
 178
 179 /* Number of threads running.  */
 180 extern unsigned int __nptl_nthreads
 181 #ifdef SHARED
 182         attribute_hidden
 183 #else
 184         __attribute ((weak))
 185 #endif
 186         ;
 187
 188 #ifndef __ASSUME_SET_ROBUST_LIST
 189 /* Negative if we do not have the system call and we can use it.  */
 190 extern int __set_robust_list_avail attribute_hidden;
 191 #endif
 192
 193 /* Thread Priority Protection.  */
 194 extern int __sched_fifo_min_prio attribute_hidden;
 195 extern int __sched_fifo_max_prio attribute_hidden;
 196 extern void __init_sched_fifo_prio (void) attribute_hidden;
 197 extern int __pthread_tpp_change_priority (int prev_prio, int new_prio)
 198      attribute_hidden;
 199 extern int __pthread_current_priority (void) attribute_hidden;
 200
 201 /* The library can run in debugging mode where it performs a lot more
 202    tests.  */
 203 extern int __pthread_debug attribute_hidden;
 204 /** For now disable debugging support.  */
 205 #if 0
 206 # define DEBUGGING_P __builtin_expect (__pthread_debug, 0)
 207 # define INVALID_TD_P(pd) (DEBUGGING_P && __find_in_stack_list (pd) == NULL)
 208 # define INVALID_NOT_TERMINATED_TD_P(pd) INVALID_TD_P (pd)
 209 #else
 210 # define DEBUGGING_P 0
 211 /* Simplified test.  This will not catch all invalid descriptors but
 212    is better than nothing.  And if the test triggers the thread
 213    descriptor is guaranteed to be invalid.  */
 214 # define INVALID_TD_P(pd) __builtin_expect ((pd)->tid <= 0, 0)
 215 # define INVALID_NOT_TERMINATED_TD_P(pd) __builtin_expect ((pd)->tid < 0, 0)
 216 #endif
 217
 218
 219 /* Cancellation test.  */
 220 #define CANCELLATION_P(self) \
 221   do {                                                                        \
 222     cancelhandling = THREAD_GETMEM (self, cancelhandling);                    \
 223     if (CANCEL_ENABLED_AND_CANCELED (cancelhandling))                         \
 224       {                                                                       \
 225         THREAD_SETMEM (self, result, PTHREAD_CANCELED);                       \
 226         __do_cancel ();                                                       \
 227       }                                                                       \
 228   } while (0)
 229
 230
 231 extern void __pthread_unwind (__pthread_unwind_buf_t *__buf)
 232      __cleanup_fct_attribute __attribute ((__noreturn__))
 233 #if !defined SHARED && !defined IS_IN_libpthread
 234      weak_function
 235 #endif
 236      ;
 237 extern void __pthread_unwind_next (__pthread_unwind_buf_t *__buf)
 238      __cleanup_fct_attribute __attribute ((__noreturn__))
 239 #ifndef SHARED
 240      weak_function
 241 #endif
 242      ;
 243 extern void __pthread_register_cancel (__pthread_unwind_buf_t *__buf)
 244      __cleanup_fct_attribute;
 245 extern void __pthread_unregister_cancel (__pthread_unwind_buf_t *__buf)
 246      __cleanup_fct_attribute;
 247 #if defined NOT_IN_libc && defined IS_IN_libpthread
 248 hidden_proto (__pthread_unwind)
 249 hidden_proto (__pthread_unwind_next)
 250 hidden_proto (__pthread_register_cancel)
 251 hidden_proto (__pthread_unregister_cancel)
 252 # ifdef SHARED
 253 extern void attribute_hidden pthread_cancel_init (void);
 254 extern void __unwind_freeres (void);
 255 # endif
 256 #endif
 257
 258
 259 /* Called when a thread reacts on a cancellation request.  */
 260 static inline void
 261 __attribute ((noreturn, always_inline))
 262 __do_cancel (void)
 263 {
 264   struct pthread *self = THREAD_SELF;
 265
 266   /* Make sure we get no more cancellations.  */
 267   THREAD_ATOMIC_BIT_SET (self, cancelhandling, EXITING_BIT);
 268
 269   __pthread_unwind ((__pthread_unwind_buf_t *)
 270                     THREAD_GETMEM (self, cleanup_jmp_buf));
 271 }
 272
 273
 274 /* Set cancellation mode to asynchronous.  */
 275 #define CANCEL_ASYNC() \
 276   __pthread_enable_asynccancel ()
 277 /* Reset to previous cancellation mode.  */
 278 #define CANCEL_RESET(oldtype) \
 279   __pthread_disable_asynccancel (oldtype)
 280
 281 #define __LABEL_PREFIX__ __stringify(__USER_LABEL_PREFIX__)
 282
 283 #if !defined NOT_IN_libc
 284 /* Same as CANCEL_ASYNC, but for use in libc.so.  */
 285 # define LIBC_CANCEL_ASYNC() \
 286   __libc_enable_asynccancel ()
 287 /* Same as CANCEL_RESET, but for use in libc.so.  */
 288 # define LIBC_CANCEL_RESET(oldtype) \
 289   __libc_disable_asynccancel (oldtype)
 290 # define LIBC_CANCEL_HANDLED() \
 291   __asm__ (".globl " __LABEL_PREFIX__ "__libc_enable_asynccancel"); \
 292   __asm__ (".globl " __LABEL_PREFIX__ "__libc_disable_asynccancel")
 293 #elif defined NOT_IN_libc && defined IS_IN_libpthread
 294 # define LIBC_CANCEL_ASYNC() CANCEL_ASYNC ()
 295 # define LIBC_CANCEL_RESET(val) CANCEL_RESET (val)
 296 # define LIBC_CANCEL_HANDLED() \
 297   __asm__ (".globl " __LABEL_PREFIX__ "__pthread_enable_asynccancel"); \
 298   __asm__ (".globl " __LABEL_PREFIX__ "__pthread_disable_asynccancel")
 299 #elif defined NOT_IN_libc && defined IS_IN_librt
 300 # define LIBC_CANCEL_ASYNC() \
 301   __librt_enable_asynccancel ()
 302 # define LIBC_CANCEL_RESET(val) \
 303   __librt_disable_asynccancel (val)
 304 # define LIBC_CANCEL_HANDLED() \
 305   __asm__ (".globl " __LABEL_PREFIX__ "__librt_enable_asynccancel"); \
 306   __asm__ (".globl " __LABEL_PREFIX__ "__librt_disable_asynccancel")
 307 #else
 308 # define LIBC_CANCEL_ASYNC()    0 /* Just a dummy value.  */
 309 # define LIBC_CANCEL_RESET(val) ((void)(val)) /* Nothing, but evaluate it.  */
 310 # define LIBC_CANCEL_HANDLED()  /* Nothing.  */
 311 #endif
 312
 313 /* The signal used for asynchronous cancellation.  */
 314 #define SIGCANCEL       __SIGRTMIN
 315
 316
 317 /* Signal needed for the kernel-supported POSIX timer implementation.
 318    We can reuse the cancellation signal since we can distinguish
 319    cancellation from timer expirations.  */
 320 #define SIGTIMER        SIGCANCEL
 321
 322
 323 /* Signal used to implement the setuid et.al. functions.  */
 324 #define SIGSETXID       (__SIGRTMIN + 1)
 325
 326 /* Used to communicate with signal handler.  */
 327 extern struct xid_command *__xidcmd attribute_hidden;
 328
 329
 330 /* Internal prototypes.  */
 331
 332 /* Thread list handling.  */
 333 extern struct pthread *__find_in_stack_list (struct pthread *pd)
 334      attribute_hidden internal_function;
 335
 336 /* Deallocate a thread's stack after optionally making sure the thread
 337    descriptor is still valid.  */
 338 extern void __free_tcb (struct pthread *pd) attribute_hidden internal_function;
 339
 340 /* Free allocated stack.  */
 341 extern void __deallocate_stack (struct pthread *pd)
 342      attribute_hidden internal_function;
 343
 344 /* Mark all the stacks except for the current one as available.  This
 345    function also re-initializes the lock for the stack cache.  */
 346 extern void __reclaim_stacks (void) attribute_hidden;
 347
 348 /* Make all threads's stacks executable.  */
 349 extern int __make_stacks_executable (void **stack_endp)
 350      internal_function attribute_hidden;
 351
 352 /* longjmp handling.  */
 353 extern void __pthread_cleanup_upto (__jmp_buf target, char *targetframe);
 354 #if defined NOT_IN_libc && defined IS_IN_libpthread
 355 hidden_proto (__pthread_cleanup_upto)
 356 #endif
 357
 358
 359 /* Functions with versioned interfaces.  */
 360 extern int __pthread_create_2_1 (pthread_t *newthread,
 361                                  const pthread_attr_t *attr,
 362                                  void *(*start_routine) (void *), void *arg);
 363 extern int __pthread_create_2_0 (pthread_t *newthread,
 364                                  const pthread_attr_t *attr,
 365                                  void *(*start_routine) (void *), void *arg);
 366 extern int __pthread_attr_init_2_1 (pthread_attr_t *attr);
 367 extern int __pthread_attr_init_2_0 (pthread_attr_t *attr);
 368
 369
 370 /* Event handlers for libthread_db interface.  */
 371 extern void __nptl_create_event (void);
 372 extern void __nptl_death_event (void);
 373 hidden_proto (__nptl_create_event)
 374 hidden_proto (__nptl_death_event)
 375
 376 /* Register the generation counter in the libpthread with the libc.  */
 377 #ifdef TLS_MULTIPLE_THREADS_IN_TCB
 378 extern void __libc_pthread_init (unsigned long int *ptr,
 379                                  void (*reclaim) (void));
 380 #else
 381 extern int *__libc_pthread_init (unsigned long int *ptr,
 382                                  void (*reclaim) (void));
 383
 384 /* Variable set to a nonzero value if more than one thread runs or ran.  */
 385 extern int __pthread_multiple_threads attribute_hidden;
 386 /* Pointer to the corresponding variable in libc.  */
 387 extern int *__libc_multiple_threads_ptr attribute_hidden;
 388 #endif
 389
 390 /* Find a thread given its TID.  */
 391 extern struct pthread *__find_thread_by_id (pid_t tid) attribute_hidden
 392 #ifdef SHARED
 393 ;
 394 #else
 395 weak_function;
 396 #define __find_thread_by_id(tid) \
 397   (__find_thread_by_id ? (__find_thread_by_id) (tid) : (struct pthread *) NULL)
 398 #endif
 399
 400 extern void __pthread_init_static_tls (struct link_map *) attribute_hidden;
 401
 402
 403 /* Namespace save aliases.  */
 404 extern int __pthread_getschedparam (pthread_t thread_id, int *policy,
 405                                     struct sched_param *param);
 406 extern int __pthread_setschedparam (pthread_t thread_id, int policy,
 407                                     const struct sched_param *param);
 408 extern int __pthread_setcancelstate (int state, int *oldstate);
 409 extern int __pthread_mutex_init (pthread_mutex_t *__mutex,
 410                                  const pthread_mutexattr_t *__mutexattr);
 411 extern int __pthread_mutex_init_internal (pthread_mutex_t *__mutex,
 412                                           const pthread_mutexattr_t *__mutexattr)
 413      attribute_hidden;
 414 extern int __pthread_mutex_destroy (pthread_mutex_t *__mutex);
 415 extern int __pthread_mutex_destroy_internal (pthread_mutex_t *__mutex)
 416      attribute_hidden;
 417 extern int __pthread_mutex_trylock (pthread_mutex_t *_mutex);
 418 extern int __pthread_mutex_lock (pthread_mutex_t *__mutex);
 419 extern int __pthread_mutex_lock_internal (pthread_mutex_t *__mutex)
 420      attribute_hidden;
 421 extern int __pthread_mutex_cond_lock (pthread_mutex_t *__mutex)
 422      attribute_hidden internal_function;
 423 extern void __pthread_mutex_cond_lock_adjust (pthread_mutex_t *__mutex)
 424      attribute_hidden internal_function;
 425 extern int __pthread_mutex_unlock (pthread_mutex_t *__mutex);
 426 extern int __pthread_mutex_unlock_internal (pthread_mutex_t *__mutex)
 427      attribute_hidden;
 428 extern int __pthread_mutex_unlock_usercnt (pthread_mutex_t *__mutex,
 429                                            int __decr)
 430      attribute_hidden internal_function;
 431 extern int __pthread_mutexattr_init (pthread_mutexattr_t *attr);
 432 extern int __pthread_mutexattr_destroy (pthread_mutexattr_t *attr);
 433 extern int __pthread_mutexattr_settype (pthread_mutexattr_t *attr, int kind);
 434 extern int __pthread_attr_destroy (pthread_attr_t *attr);
 435 extern int __pthread_attr_getdetachstate (const pthread_attr_t *attr,
 436                                           int *detachstate);
 437 extern int __pthread_attr_setdetachstate (pthread_attr_t *attr,
 438                                           int detachstate);
 439 extern int __pthread_attr_getinheritsched (const pthread_attr_t *attr,
 440                                            int *inherit);
 441 extern int __pthread_attr_setinheritsched (pthread_attr_t *attr, int inherit);
 442 extern int __pthread_attr_getschedparam (const pthread_attr_t *attr,
 443                                          struct sched_param *param);
 444 extern int __pthread_attr_setschedparam (pthread_attr_t *attr,
 445                                          const struct sched_param *param);
 446 extern int __pthread_attr_getschedpolicy (const pthread_attr_t *attr,
 447                                           int *policy);
 448 extern int __pthread_attr_setschedpolicy (pthread_attr_t *attr, int policy);
 449 extern int __pthread_attr_getscope (const pthread_attr_t *attr, int *scope);
 450 extern int __pthread_attr_setscope (pthread_attr_t *attr, int scope);
 451 extern int __pthread_attr_getstackaddr (const pthread_attr_t *__restrict
 452                                         __attr, void **__restrict __stackaddr);
 453 extern int __pthread_attr_setstackaddr (pthread_attr_t *__attr,
 454                                         void *__stackaddr);
 455 extern int __pthread_attr_getstacksize (const pthread_attr_t *__restrict
 456                                         __attr,
 457                                         size_t *__restrict __stacksize);
 458 extern int __pthread_attr_setstacksize (pthread_attr_t *__attr,
 459                                         size_t __stacksize);
 460 extern int __pthread_attr_getstack (const pthread_attr_t *__restrict __attr,
 461                                     void **__restrict __stackaddr,
 462                                     size_t *__restrict __stacksize);
 463 extern int __pthread_attr_setstack (pthread_attr_t *__attr, void *__stackaddr,
 464                                     size_t __stacksize);
 465 extern int __pthread_rwlock_init (pthread_rwlock_t *__restrict __rwlock,
 466                                   const pthread_rwlockattr_t *__restrict
 467                                   __attr);
 468 extern int __pthread_rwlock_destroy (pthread_rwlock_t *__rwlock);
 469 extern int __pthread_rwlock_rdlock (pthread_rwlock_t *__rwlock);
 470 extern int __pthread_rwlock_rdlock_internal (pthread_rwlock_t *__rwlock);
 471 extern int __pthread_rwlock_tryrdlock (pthread_rwlock_t *__rwlock);
 472 extern int __pthread_rwlock_wrlock (pthread_rwlock_t *__rwlock);
 473 extern int __pthread_rwlock_wrlock_internal (pthread_rwlock_t *__rwlock);
 474 extern int __pthread_rwlock_trywrlock (pthread_rwlock_t *__rwlock);
 475 extern int __pthread_rwlock_unlock (pthread_rwlock_t *__rwlock);
 476 extern int __pthread_rwlock_unlock_internal (pthread_rwlock_t *__rwlock);
 477 extern int __pthread_cond_broadcast (pthread_cond_t *cond);
 478 extern int __pthread_cond_destroy (pthread_cond_t *cond);
 479 extern int __pthread_cond_init (pthread_cond_t *cond,
 480                                 const pthread_condattr_t *cond_attr);
 481 extern int __pthread_cond_signal (pthread_cond_t *cond);
 482 extern int __pthread_cond_wait (pthread_cond_t *cond, pthread_mutex_t *mutex);
 483 extern int __pthread_cond_timedwait (pthread_cond_t *cond,
 484                                      pthread_mutex_t *mutex,
 485                                      const struct timespec *abstime);
 486 extern int __pthread_condattr_destroy (pthread_condattr_t *attr);
 487 extern int __pthread_condattr_init (pthread_condattr_t *attr);
 488 extern int __pthread_key_create (pthread_key_t *key, void (*destr) (void *));
 489 extern int __pthread_key_create_internal (pthread_key_t *key,
 490                                           void (*destr) (void *));
 491 extern void *__pthread_getspecific (pthread_key_t key);
 492 extern void *__pthread_getspecific_internal (pthread_key_t key);
 493 extern int __pthread_setspecific (pthread_key_t key, const void *value);
 494 extern int __pthread_setspecific_internal (pthread_key_t key,
 495                                            const void *value);
 496 extern int __pthread_once (pthread_once_t *once_control,
 497                            void (*init_routine) (void));
 498 extern int __pthread_once_internal (pthread_once_t *once_control,
 499                                     void (*init_routine) (void));
 500 extern int __pthread_atfork (void (*prepare) (void), void (*parent) (void),
 501                              void (*child) (void));
 502 extern pthread_t __pthread_self (void);
 503 extern int __pthread_equal (pthread_t thread1, pthread_t thread2);
 504 extern int __pthread_kill (pthread_t threadid, int signo);
 505 extern void __pthread_exit (void *value);
 506 extern int __pthread_setcanceltype (int type, int *oldtype);
 507 extern int __pthread_enable_asynccancel (void) attribute_hidden;
 508 extern void __pthread_disable_asynccancel (int oldtype)
 509      internal_function attribute_hidden;
 510
 511 extern int __pthread_cond_broadcast_2_0 (pthread_cond_2_0_t *cond);
 512 extern int __pthread_cond_destroy_2_0 (pthread_cond_2_0_t *cond);
 513 extern int __pthread_cond_init_2_0 (pthread_cond_2_0_t *cond,
 514                                     const pthread_condattr_t *cond_attr);
 515 extern int __pthread_cond_signal_2_0 (pthread_cond_2_0_t *cond);
 516 extern int __pthread_cond_timedwait_2_0 (pthread_cond_2_0_t *cond,
 517                                          pthread_mutex_t *mutex,
 518                                          const struct timespec *abstime);
 519 extern int __pthread_cond_wait_2_0 (pthread_cond_2_0_t *cond,
 520                                     pthread_mutex_t *mutex);
 521
 522 extern int __pthread_getaffinity_np (pthread_t th, size_t cpusetsize,
 523                                      cpu_set_t *cpuset);
 524
 525 /* The two functions are in libc.so and not exported.  */
 526 extern int __libc_enable_asynccancel (void) attribute_hidden;
 527 extern void __libc_disable_asynccancel (int oldtype)
 528      internal_function attribute_hidden;
 529
 530
 531 /* The two functions are in librt.so and not exported.  */
 532 extern int __librt_enable_asynccancel (void) attribute_hidden;
 533 extern void __librt_disable_asynccancel (int oldtype)
 534      internal_function attribute_hidden;
 535
 536 #ifdef IS_IN_libpthread
 537 /* Special versions which use non-exported functions.  */
 538 extern void __pthread_cleanup_push (struct _pthread_cleanup_buffer *buffer,
 539                                     void (*routine) (void *), void *arg)
 540      attribute_hidden;
 541 # undef pthread_cleanup_push
 542 # define pthread_cleanup_push(routine,arg) \
 543   { struct _pthread_cleanup_buffer _buffer;                                   \
 544     __pthread_cleanup_push (&_buffer, (routine), (arg));
 545
 546 extern void __pthread_cleanup_pop (struct _pthread_cleanup_buffer *buffer,
 547                                    int execute) attribute_hidden;
 548 # undef pthread_cleanup_pop
 549 # define pthread_cleanup_pop(execute) \
 550     __pthread_cleanup_pop (&_buffer, (execute)); }
 551 #endif
 552
 553 extern void __pthread_cleanup_push_defer (struct _pthread_cleanup_buffer *buffer,
 554                                           void (*routine) (void *), void *arg);
 555 extern void __pthread_cleanup_pop_restore (struct _pthread_cleanup_buffer *buffer,
 556                                            int execute);
 557
 558 /* Old cleanup interfaces, still used in libc.so.  */
 559 extern void _pthread_cleanup_push (struct _pthread_cleanup_buffer *buffer,
 560                                    void (*routine) (void *), void *arg);
 561 extern void _pthread_cleanup_pop (struct _pthread_cleanup_buffer *buffer,
 562                                   int execute);
 563 extern void _pthread_cleanup_push_defer (struct _pthread_cleanup_buffer *buffer,
 564                                          void (*routine) (void *), void *arg);
 565 extern void _pthread_cleanup_pop_restore (struct _pthread_cleanup_buffer *buffer,
 566                                           int execute);
 567
 568 extern void __nptl_deallocate_tsd (void)
 569 #ifdef SHARED
 570         attribute_hidden
 571 #else
 572         __attribute ((weak))
 573 #endif
 574         ;
 575
 576 extern int __nptl_setxid (struct xid_command *cmdp) attribute_hidden;
 577
 578 extern void __free_stacks (size_t limit) attribute_hidden;
 579
 580 extern void __wait_lookup_done (void) attribute_hidden;
 581
 582 #ifdef SHARED
 583 # define PTHREAD_STATIC_FN_REQUIRE(name)
 584 #else
 585 # define PTHREAD_STATIC_FN_REQUIRE(name) __asm__ (".globl " #name);
 586 #endif
 587
 588
 589 #ifndef __NR_set_robust_list
 590 /* XXX For the time being...  Once we can rely on the kernel headers
 591    having the definition remove these lines.  */
 592 # if defined __i386__
 593 #  define __NR_set_robust_list  311
 594 # elif defined __x86_64__
 595 #  define __NR_set_robust_list  273
 596 # endif
 597 #endif
 598
 599 #endif  /* pthreadP.h */