nptl/pthreadP.h

   1 /* Copyright (C) 2002,2003,2004,2005,2006,2007 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 /* Check whether rwlock prefers readers.   */
 122 #define PTHREAD_RWLOCK_PREFER_READER_P(rwlock) \
 123   ((rwlock)->__data.__flags == 0)
 124
 125
 126 /* Bits used in robust mutex implementation.  */
 127 #define FUTEX_WAITERS           0x80000000
 128 #define FUTEX_OWNER_DIED        0x40000000
 129 #define FUTEX_TID_MASK          0x3fffffff
 130
 131
 132 /* Internal variables.  */
 133
 134
 135 /* Default stack size.  */
 136 extern size_t __default_stacksize attribute_hidden;
 137
 138 /* Size and alignment of static TLS block.  */
 139 extern size_t __static_tls_size attribute_hidden;
 140 extern size_t __static_tls_align_m1 attribute_hidden;
 141
 142 /* Flag whether the machine is SMP or not.  */
 143 extern int __is_smp attribute_hidden;
 144
 145 /* Thread descriptor handling.  */
 146 extern list_t __stack_user;
 147 hidden_proto (__stack_user)
 148
 149 /* Attribute handling.  */
 150 extern struct pthread_attr *__attr_list attribute_hidden;
 151 extern lll_lock_t __attr_list_lock attribute_hidden;
 152
 153 /* First available RT signal.  */
 154 extern int __current_sigrtmin attribute_hidden;
 155 /* Last available RT signal.  */
 156 extern int __current_sigrtmax attribute_hidden;
 157
 158 /* Concurrency handling.  */
 159 extern int __concurrency_level attribute_hidden;
 160
 161 /* Thread-local data key handling.  */
 162 extern struct pthread_key_struct __pthread_keys[PTHREAD_KEYS_MAX];
 163 hidden_proto (__pthread_keys)
 164
 165 /* Number of threads running.  */
 166 extern unsigned int __nptl_nthreads attribute_hidden;
 167
 168 #ifndef __ASSUME_SET_ROBUST_LIST
 169 /* Negative if we do not have the system call and we can use it.  */
 170 extern int __set_robust_list_avail attribute_hidden;
 171 #endif
 172
 173 /* Thread Priority Protection.  */
 174 extern int __sched_fifo_min_prio attribute_hidden;
 175 extern int __sched_fifo_max_prio attribute_hidden;
 176 extern void __init_sched_fifo_prio (void) attribute_hidden;
 177 extern int __pthread_tpp_change_priority (int prev_prio, int new_prio)
 178      attribute_hidden;
 179 extern int __pthread_current_priority (void) attribute_hidden;
 180
 181 /* The library can run in debugging mode where it performs a lot more
 182    tests.  */
 183 extern int __pthread_debug attribute_hidden;
 184 /** For now disable debugging support.  */
 185 #if 0
 186 # define DEBUGGING_P __builtin_expect (__pthread_debug, 0)
 187 # define INVALID_TD_P(pd) (DEBUGGING_P && __find_in_stack_list (pd) == NULL)
 188 # define INVALID_NOT_TERMINATED_TD_P(pd) INVALID_TD_P (pd)
 189 #else
 190 # define DEBUGGING_P 0
 191 /* Simplified test.  This will not catch all invalid descriptors but
 192    is better than nothing.  And if the test triggers the thread
 193    descriptor is guaranteed to be invalid.  */
 194 # define INVALID_TD_P(pd) __builtin_expect ((pd)->tid <= 0, 0)
 195 # define INVALID_NOT_TERMINATED_TD_P(pd) __builtin_expect ((pd)->tid < 0, 0)
 196 #endif
 197
 198
 199 /* Cancellation test.  */
 200 #define CANCELLATION_P(self) \
 201   do {                                                                        \
 202     int cancelhandling = THREAD_GETMEM (self, cancelhandling);                \
 203     if (CANCEL_ENABLED_AND_CANCELED (cancelhandling))                         \
 204       {                                                                       \
 205         THREAD_SETMEM (self, result, PTHREAD_CANCELED);                       \
 206         __do_cancel ();                                                       \
 207       }                                                                       \
 208   } while (0)
 209
 210
 211 extern void __pthread_unwind (__pthread_unwind_buf_t *__buf)
 212      __cleanup_fct_attribute __attribute ((__noreturn__))
 213 #if !defined SHARED && !defined IS_IN_libpthread
 214      weak_function
 215 #endif
 216      ;
 217 extern void __pthread_unwind_next (__pthread_unwind_buf_t *__buf)
 218      __cleanup_fct_attribute __attribute ((__noreturn__))
 219 #ifndef SHARED
 220      weak_function
 221 #endif
 222      ;
 223 extern void __pthread_register_cancel (__pthread_unwind_buf_t *__buf)
 224      __cleanup_fct_attribute;
 225 extern void __pthread_unregister_cancel (__pthread_unwind_buf_t *__buf)
 226      __cleanup_fct_attribute;
 227 #if defined NOT_IN_libc && defined IS_IN_libpthread
 228 hidden_proto (__pthread_unwind)
 229 hidden_proto (__pthread_unwind_next)
 230 hidden_proto (__pthread_register_cancel)
 231 hidden_proto (__pthread_unregister_cancel)
 232 # ifdef SHARED
 233 extern void attribute_hidden pthread_cancel_init (void);
 234 # endif
 235 #endif
 236
 237
 238 /* Called when a thread reacts on a cancellation request.  */
 239 static inline void
 240 __attribute ((noreturn, always_inline))
 241 __do_cancel (void)
 242 {
 243   struct pthread *self = THREAD_SELF;
 244
 245   /* Make sure we get no more cancellations.  */
 246   THREAD_ATOMIC_BIT_SET (self, cancelhandling, EXITING_BIT);
 247
 248   __pthread_unwind ((__pthread_unwind_buf_t *)
 249                     THREAD_GETMEM (self, cleanup_jmp_buf));
 250 }
 251
 252
 253 /* Set cancellation mode to asynchronous.  */
 254 #define CANCEL_ASYNC() \
 255   __pthread_enable_asynccancel ()
 256 /* Reset to previous cancellation mode.  */
 257 #define CANCEL_RESET(oldtype) \
 258   __pthread_disable_asynccancel (oldtype)
 259
 260 #if !defined NOT_IN_libc
 261 /* Same as CANCEL_ASYNC, but for use in libc.so.  */
 262 # define LIBC_CANCEL_ASYNC() \
 263   __libc_enable_asynccancel ()
 264 /* Same as CANCEL_RESET, but for use in libc.so.  */
 265 # define LIBC_CANCEL_RESET(oldtype) \
 266   __libc_disable_asynccancel (oldtype)
 267 # define LIBC_CANCEL_HANDLED() \
 268   __asm (".globl " __SYMBOL_PREFIX "__libc_enable_asynccancel"); \
 269   __asm (".globl " __SYMBOL_PREFIX "__libc_disable_asynccancel")
 270 #elif defined NOT_IN_libc && defined IS_IN_libpthread
 271 # define LIBC_CANCEL_ASYNC() CANCEL_ASYNC ()
 272 # define LIBC_CANCEL_RESET(val) CANCEL_RESET (val)
 273 # define LIBC_CANCEL_HANDLED() \
 274   __asm (".globl " __SYMBOL_PREFIX "__pthread_enable_asynccancel"); \
 275   __asm (".globl " __SYMBOL_PREFIX "__pthread_disable_asynccancel")
 276 #elif defined NOT_IN_libc && defined IS_IN_librt
 277 # define LIBC_CANCEL_ASYNC() \
 278   __librt_enable_asynccancel ()
 279 # define LIBC_CANCEL_RESET(val) \
 280   __librt_disable_asynccancel (val)
 281 # define LIBC_CANCEL_HANDLED() \
 282   __asm (".globl " __SYMBOL_PREFIX "__librt_enable_asynccancel"); \
 283   __asm (".globl " __SYMBOL_PREFIX "__librt_disable_asynccancel")
 284 #else
 285 # define LIBC_CANCEL_ASYNC()    0 /* Just a dummy value.  */
 286 # define LIBC_CANCEL_RESET(val) ((void)(val)) /* Nothing, but evaluate it.  */
 287 # define LIBC_CANCEL_HANDLED()  /* Nothing.  */
 288 #endif
 289
 290 /* The signal used for asynchronous cancelation.  */
 291 #define SIGCANCEL       __SIGRTMIN
 292
 293
 294 /* Signal needed for the kernel-supported POSIX timer implementation.
 295    We can reuse the cancellation signal since we can distinguish
 296    cancellation from timer expirations.  */
 297 #define SIGTIMER        SIGCANCEL
 298
 299
 300 /* Signal used to implement the setuid et.al. functions.  */
 301 #define SIGSETXID       (__SIGRTMIN + 1)
 302
 303 /* Used to communicate with signal handler.  */
 304 extern struct xid_command *__xidcmd attribute_hidden;
 305
 306
 307 /* Internal prototypes.  */
 308
 309 /* Thread list handling.  */
 310 extern struct pthread *__find_in_stack_list (struct pthread *pd)
 311      attribute_hidden internal_function;
 312
 313 /* Deallocate a thread's stack after optionally making sure the thread
 314    descriptor is still valid.  */
 315 extern void __free_tcb (struct pthread *pd) attribute_hidden internal_function;
 316
 317 /* Free allocated stack.  */
 318 extern void __deallocate_stack (struct pthread *pd)
 319      attribute_hidden internal_function;
 320
 321 /* Mark all the stacks except for the current one as available.  This
 322    function also re-initializes the lock for the stack cache.  */
 323 extern void __reclaim_stacks (void) attribute_hidden;
 324
 325 /* Make all threads's stacks executable.  */
 326 extern int __make_stacks_executable (void **stack_endp)
 327      internal_function attribute_hidden;
 328
 329 /* longjmp handling.  */
 330 extern void __pthread_cleanup_upto (__jmp_buf target, char *targetframe);
 331 #if defined NOT_IN_libc && defined IS_IN_libpthread
 332 hidden_proto (__pthread_cleanup_upto)
 333 #endif
 334
 335
 336 /* Functions with versioned interfaces.  */
 337 extern int __pthread_create_2_1 (pthread_t *newthread,
 338                                  const pthread_attr_t *attr,
 339                                  void *(*start_routine) (void *), void *arg);
 340 extern int __pthread_create_2_0 (pthread_t *newthread,
 341                                  const pthread_attr_t *attr,
 342                                  void *(*start_routine) (void *), void *arg);
 343 extern int __pthread_attr_init_2_1 (pthread_attr_t *attr);
 344 extern int __pthread_attr_init_2_0 (pthread_attr_t *attr);
 345
 346
 347 /* Event handlers for libthread_db interface.  */
 348 extern void __nptl_create_event (void);
 349 extern void __nptl_death_event (void);
 350 hidden_proto (__nptl_create_event)
 351 hidden_proto (__nptl_death_event)
 352
 353 /* Register the generation counter in the libpthread with the libc.  */
 354 #ifdef TLS_MULTIPLE_THREADS_IN_TCB
 355 extern void __libc_pthread_init (unsigned long int *ptr,
 356                                  void (*reclaim) (void),
 357                                  const struct pthread_functions *functions)
 358      internal_function;
 359 #else
 360 extern int *__libc_pthread_init (unsigned long int *ptr,
 361                                  void (*reclaim) (void),
 362                                  const struct pthread_functions *functions)
 363      internal_function;
 364
 365 /* Variable set to a nonzero value if more than one thread runs or ran.  */
 366 extern int __pthread_multiple_threads attribute_hidden;
 367 /* Pointer to the corresponding variable in libc.  */
 368 extern int *__libc_multiple_threads_ptr attribute_hidden;
 369 #endif
 370
 371 /* Find a thread given its TID.  */
 372 extern struct pthread *__find_thread_by_id (pid_t tid) attribute_hidden
 373 #ifdef SHARED
 374 ;
 375 #else
 376 weak_function;
 377 #define __find_thread_by_id(tid) \
 378   (__find_thread_by_id ? (__find_thread_by_id) (tid) : (struct pthread *) NULL)
 379 #endif
 380
 381 extern void __pthread_init_static_tls (struct link_map *) attribute_hidden;
 382
 383
 384 /* Namespace save aliases.  */
 385 extern int __pthread_getschedparam (pthread_t thread_id, int *policy,
 386                                     struct sched_param *param);
 387 extern int __pthread_setschedparam (pthread_t thread_id, int policy,
 388                                     const struct sched_param *param);
 389 extern int __pthread_setcancelstate (int state, int *oldstate);
 390 extern int __pthread_mutex_init (pthread_mutex_t *__mutex,
 391                                  __const pthread_mutexattr_t *__mutexattr);
 392 extern int __pthread_mutex_init_internal (pthread_mutex_t *__mutex,
 393                                           __const pthread_mutexattr_t *__mutexattr)
 394      attribute_hidden;
 395 extern int __pthread_mutex_destroy (pthread_mutex_t *__mutex);
 396 extern int __pthread_mutex_destroy_internal (pthread_mutex_t *__mutex)
 397      attribute_hidden;
 398 extern int __pthread_mutex_trylock (pthread_mutex_t *_mutex);
 399 extern int __pthread_mutex_lock (pthread_mutex_t *__mutex);
 400 extern int __pthread_mutex_lock_internal (pthread_mutex_t *__mutex)
 401      attribute_hidden;
 402 extern int __pthread_mutex_cond_lock (pthread_mutex_t *__mutex)
 403      attribute_hidden internal_function;
 404 extern int __pthread_mutex_unlock (pthread_mutex_t *__mutex);
 405 extern int __pthread_mutex_unlock_internal (pthread_mutex_t *__mutex)
 406      attribute_hidden;
 407 extern int __pthread_mutex_unlock_usercnt (pthread_mutex_t *__mutex,
 408                                            int __decr)
 409      attribute_hidden internal_function;
 410 extern int __pthread_mutexattr_init (pthread_mutexattr_t *attr);
 411 extern int __pthread_mutexattr_destroy (pthread_mutexattr_t *attr);
 412 extern int __pthread_mutexattr_settype (pthread_mutexattr_t *attr, int kind);
 413 extern int __pthread_attr_destroy (pthread_attr_t *attr);
 414 extern int __pthread_attr_getdetachstate (const pthread_attr_t *attr,
 415                                           int *detachstate);
 416 extern int __pthread_attr_setdetachstate (pthread_attr_t *attr,
 417                                           int detachstate);
 418 extern int __pthread_attr_getinheritsched (const pthread_attr_t *attr,
 419                                            int *inherit);
 420 extern int __pthread_attr_setinheritsched (pthread_attr_t *attr, int inherit);
 421 extern int __pthread_attr_getschedparam (const pthread_attr_t *attr,
 422                                          struct sched_param *param);
 423 extern int __pthread_attr_setschedparam (pthread_attr_t *attr,
 424                                          const struct sched_param *param);
 425 extern int __pthread_attr_getschedpolicy (const pthread_attr_t *attr,
 426                                           int *policy);
 427 extern int __pthread_attr_setschedpolicy (pthread_attr_t *attr, int policy);
 428 extern int __pthread_attr_getscope (const pthread_attr_t *attr, int *scope);
 429 extern int __pthread_attr_setscope (pthread_attr_t *attr, int scope);
 430 extern int __pthread_attr_getstackaddr (__const pthread_attr_t *__restrict
 431                                         __attr, void **__restrict __stackaddr);
 432 extern int __pthread_attr_setstackaddr (pthread_attr_t *__attr,
 433                                         void *__stackaddr);
 434 extern int __pthread_attr_getstacksize (__const pthread_attr_t *__restrict
 435                                         __attr,
 436                                         size_t *__restrict __stacksize);
 437 extern int __pthread_attr_setstacksize (pthread_attr_t *__attr,
 438                                         size_t __stacksize);
 439 extern int __pthread_attr_getstack (__const pthread_attr_t *__restrict __attr,
 440                                     void **__restrict __stackaddr,
 441                                     size_t *__restrict __stacksize);
 442 extern int __pthread_attr_setstack (pthread_attr_t *__attr, void *__stackaddr,
 443                                     size_t __stacksize);
 444 extern int __pthread_rwlock_init (pthread_rwlock_t *__restrict __rwlock,
 445                                   __const pthread_rwlockattr_t *__restrict
 446                                   __attr);
 447 extern int __pthread_rwlock_destroy (pthread_rwlock_t *__rwlock);
 448 extern int __pthread_rwlock_rdlock (pthread_rwlock_t *__rwlock);
 449 extern int __pthread_rwlock_rdlock_internal (pthread_rwlock_t *__rwlock);
 450 extern int __pthread_rwlock_tryrdlock (pthread_rwlock_t *__rwlock);
 451 extern int __pthread_rwlock_wrlock (pthread_rwlock_t *__rwlock);
 452 extern int __pthread_rwlock_wrlock_internal (pthread_rwlock_t *__rwlock);
 453 extern int __pthread_rwlock_trywrlock (pthread_rwlock_t *__rwlock);
 454 extern int __pthread_rwlock_unlock (pthread_rwlock_t *__rwlock);
 455 extern int __pthread_rwlock_unlock_internal (pthread_rwlock_t *__rwlock);
 456 extern int __pthread_cond_broadcast (pthread_cond_t *cond);
 457 extern int __pthread_cond_destroy (pthread_cond_t *cond);
 458 extern int __pthread_cond_init (pthread_cond_t *cond,
 459                                 const pthread_condattr_t *cond_attr);
 460 extern int __pthread_cond_signal (pthread_cond_t *cond);
 461 extern int __pthread_cond_wait (pthread_cond_t *cond, pthread_mutex_t *mutex);
 462 extern int __pthread_cond_timedwait (pthread_cond_t *cond,
 463                                      pthread_mutex_t *mutex,
 464                                      const struct timespec *abstime);
 465 extern int __pthread_condattr_destroy (pthread_condattr_t *attr);
 466 extern int __pthread_condattr_init (pthread_condattr_t *attr);
 467 extern int __pthread_key_create (pthread_key_t *key, void (*destr) (void *));
 468 extern int __pthread_key_create_internal (pthread_key_t *key,
 469                                           void (*destr) (void *));
 470 extern void *__pthread_getspecific (pthread_key_t key);
 471 extern void *__pthread_getspecific_internal (pthread_key_t key);
 472 extern int __pthread_setspecific (pthread_key_t key, const void *value);
 473 extern int __pthread_setspecific_internal (pthread_key_t key,
 474                                            const void *value);
 475 extern int __pthread_once (pthread_once_t *once_control,
 476                            void (*init_routine) (void));
 477 extern int __pthread_once_internal (pthread_once_t *once_control,
 478                                     void (*init_routine) (void));
 479 extern int __pthread_atfork (void (*prepare) (void), void (*parent) (void),
 480                              void (*child) (void));
 481 extern pthread_t __pthread_self (void);
 482 extern int __pthread_equal (pthread_t thread1, pthread_t thread2);
 483 extern int __pthread_kill (pthread_t threadid, int signo);
 484 extern void __pthread_exit (void *value);
 485 extern int __pthread_setcanceltype (int type, int *oldtype);
 486 extern int __pthread_enable_asynccancel (void) attribute_hidden;
 487 extern void __pthread_disable_asynccancel (int oldtype)
 488      internal_function attribute_hidden;
 489
 490 extern int __pthread_cond_broadcast_2_0 (pthread_cond_2_0_t *cond);
 491 extern int __pthread_cond_destroy_2_0 (pthread_cond_2_0_t *cond);
 492 extern int __pthread_cond_init_2_0 (pthread_cond_2_0_t *cond,
 493                                     const pthread_condattr_t *cond_attr);
 494 extern int __pthread_cond_signal_2_0 (pthread_cond_2_0_t *cond);
 495 extern int __pthread_cond_timedwait_2_0 (pthread_cond_2_0_t *cond,
 496                                          pthread_mutex_t *mutex,
 497                                          const struct timespec *abstime);
 498 extern int __pthread_cond_wait_2_0 (pthread_cond_2_0_t *cond,
 499                                     pthread_mutex_t *mutex);
 500
 501 extern int __pthread_getaffinity_np (pthread_t th, size_t cpusetsize,
 502                                      cpu_set_t *cpuset);
 503
 504 /* The two functions are in libc.so and not exported.  */
 505 extern int __libc_enable_asynccancel (void) attribute_hidden;
 506 extern void __libc_disable_asynccancel (int oldtype)
 507      internal_function attribute_hidden;
 508
 509
 510 /* The two functions are in librt.so and not exported.  */
 511 extern int __librt_enable_asynccancel (void) attribute_hidden;
 512 extern void __librt_disable_asynccancel (int oldtype)
 513      internal_function attribute_hidden;
 514
 515 #ifdef IS_IN_libpthread
 516 /* Special versions which use non-exported functions.  */
 517 extern void __pthread_cleanup_push (struct _pthread_cleanup_buffer *buffer,
 518                                     void (*routine) (void *), void *arg)
 519      attribute_hidden;
 520 # undef pthread_cleanup_push
 521 # define pthread_cleanup_push(routine,arg) \
 522   { struct _pthread_cleanup_buffer _buffer;                                   \
 523     __pthread_cleanup_push (&_buffer, (routine), (arg));
 524
 525 extern void __pthread_cleanup_pop (struct _pthread_cleanup_buffer *buffer,
 526                                    int execute) attribute_hidden;
 527 # undef pthread_cleanup_pop
 528 # define pthread_cleanup_pop(execute) \
 529     __pthread_cleanup_pop (&_buffer, (execute)); }
 530 #endif
 531
 532 extern void __pthread_cleanup_push_defer (struct _pthread_cleanup_buffer *buffer,
 533                                           void (*routine) (void *), void *arg);
 534 extern void __pthread_cleanup_pop_restore (struct _pthread_cleanup_buffer *buffer,
 535                                            int execute);
 536
 537 /* Old cleanup interfaces, still used in libc.so.  */
 538 extern void _pthread_cleanup_push (struct _pthread_cleanup_buffer *buffer,
 539                                    void (*routine) (void *), void *arg);
 540 extern void _pthread_cleanup_pop (struct _pthread_cleanup_buffer *buffer,
 541                                   int execute);
 542 extern void _pthread_cleanup_push_defer (struct _pthread_cleanup_buffer *buffer,
 543                                          void (*routine) (void *), void *arg);
 544 extern void _pthread_cleanup_pop_restore (struct _pthread_cleanup_buffer *buffer,
 545                                           int execute);
 546
 547 extern void __nptl_deallocate_tsd (void) attribute_hidden;
 548
 549 extern int __nptl_setxid (struct xid_command *cmdp) attribute_hidden;
 550
 551 extern void __free_stack_cache (void) attribute_hidden;
 552
 553 extern void __wait_lookup_done (void) attribute_hidden;
 554
 555 #ifdef SHARED
 556 # define PTHREAD_STATIC_FN_REQUIRE(name)
 557 #else
 558 # define PTHREAD_STATIC_FN_REQUIRE(name) __asm (".globl " #name);
 559 #endif
 560
 561
 562 #ifndef __NR_set_robust_list
 563 /* XXX For the time being...  Once we can rely on the kernel headers
 564    having the definition remove these lines.  */
 565 # if defined __i386__
 566 #  define __NR_set_robust_list  311
 567 # elif defined __x86_64__
 568 #  define __NR_set_robust_list  273
 569 # endif
 570 #endif
 571
 572 #endif  /* pthreadP.h */