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
  35
  36 /* Atomic operations on TLS memory.  */
  37 #ifndef THREAD_ATOMIC_CMPXCHG_VAL
  38 # define THREAD_ATOMIC_CMPXCHG_VAL(descr, member, new, old) \
  39   atomic_compare_and_exchange_val_acq (&(descr)->member, new, old)
  40 #endif
  41
  42 #ifndef THREAD_ATOMIC_BIT_SET
  43 # define THREAD_ATOMIC_BIT_SET(descr, member, bit) \
  44   atomic_bit_set (&(descr)->member, bit)
  45 #endif
  46
  47
  48 /* Adaptive mutex definitions.  */
  49 #ifndef MAX_ADAPTIVE_COUNT
  50 # define MAX_ADAPTIVE_COUNT 100
  51 #endif
  52
  53
  54 /* Magic cookie representing robust mutex with dead owner.  */
  55 #define PTHREAD_MUTEX_INCONSISTENT      INT_MAX
  56 /* Magic cookie representing not recoverable robust mutex.  */
  57 #define PTHREAD_MUTEX_NOTRECOVERABLE    (INT_MAX - 1)
  58
  59
  60 /* Internal mutex type value.  */
  61 enum
  62 {
  63   PTHREAD_MUTEX_ROBUST_PRIVATE_NP = 16,
  64   PTHREAD_MUTEX_ROBUST_PRIVATE_RECURSIVE_NP
  65   = PTHREAD_MUTEX_ROBUST_PRIVATE_NP | PTHREAD_MUTEX_RECURSIVE_NP,
  66   PTHREAD_MUTEX_ROBUST_PRIVATE_ERRORCHECK_NP
  67   = PTHREAD_MUTEX_ROBUST_PRIVATE_NP | PTHREAD_MUTEX_ERRORCHECK_NP,
  68   PTHREAD_MUTEX_ROBUST_PRIVATE_ADAPTIVE_NP
  69   = PTHREAD_MUTEX_ROBUST_PRIVATE_NP | PTHREAD_MUTEX_ADAPTIVE_NP
  70 };
  71
  72
  73 /* Flags in mutex attr.  */
  74 #define PTHREAD_MUTEXATTR_FLAG_ROBUST   0x40000000
  75 #define PTHREAD_MUTEXATTR_FLAG_PSHARED  0x80000000
  76 #define PTHREAD_MUTEXATTR_FLAG_BITS \
  77   (PTHREAD_MUTEXATTR_FLAG_ROBUST | PTHREAD_MUTEXATTR_FLAG_PSHARED)
  78
  79
  80 /* Bits used in robust mutex implementation.  */
  81 #define FUTEX_WAITERS           0x80000000
  82 #define FUTEX_OWNER_DIED        0x40000000
  83 #define FUTEX_TID_MASK          0x1fffffff
  84
  85
  86 /* Internal variables.  */
  87
  88
  89 /* Default stack size.  */
  90 extern size_t __default_stacksize attribute_hidden;
  91
  92 /* Size and alignment of static TLS block.  */
  93 extern size_t __static_tls_size attribute_hidden;
  94 extern size_t __static_tls_align_m1 attribute_hidden;
  95
  96 /* Flag whether the machine is SMP or not.  */
  97 extern int __is_smp attribute_hidden;
  98
  99 /* Thread descriptor handling.  */
 100 extern list_t __stack_user;
 101 hidden_proto (__stack_user)
 102
 103 /* Attribute handling.  */
 104 extern struct pthread_attr *__attr_list attribute_hidden;
 105 extern lll_lock_t __attr_list_lock attribute_hidden;
 106
 107 /* First available RT signal.  */
 108 extern int __current_sigrtmin attribute_hidden;
 109 /* Last available RT signal.  */
 110 extern int __current_sigrtmax attribute_hidden;
 111
 112 /* Concurrency handling.  */
 113 extern int __concurrency_level attribute_hidden;
 114
 115 /* Thread-local data key handling.  */
 116 extern struct pthread_key_struct __pthread_keys[PTHREAD_KEYS_MAX];
 117 hidden_proto (__pthread_keys)
 118
 119 /* Number of threads running.  */
 120 extern unsigned int __nptl_nthreads attribute_hidden;
 121
 122 /* The library can run in debugging mode where it performs a lot more
 123    tests.  */
 124 extern int __pthread_debug attribute_hidden;
 125 /** For now disable debugging support.  */
 126 #if 0
 127 # define DEBUGGING_P __builtin_expect (__pthread_debug, 0)
 128 # define INVALID_TD_P(pd) (DEBUGGING_P && __find_in_stack_list (pd) == NULL)
 129 # define INVALID_NOT_TERMINATED_TD_P(pd) INVALID_TD_P (pd)
 130 #else
 131 # define DEBUGGING_P 0
 132 /* Simplified test.  This will not catch all invalid descriptors but
 133    is better than nothing.  And if the test triggers the thread
 134    descriptor is guaranteed to be invalid.  */
 135 # define INVALID_TD_P(pd) __builtin_expect ((pd)->tid <= 0, 0)
 136 # define INVALID_NOT_TERMINATED_TD_P(pd) __builtin_expect ((pd)->tid < 0, 0)
 137 #endif
 138
 139
 140 /* Cancellation test.  */
 141 #define CANCELLATION_P(self) \
 142   do {                                                                        \
 143     int cancelhandling = THREAD_GETMEM (self, cancelhandling);                \
 144     if (CANCEL_ENABLED_AND_CANCELED (cancelhandling))                         \
 145       {                                                                       \
 146         THREAD_SETMEM (self, result, PTHREAD_CANCELED);                       \
 147         __do_cancel ();                                                       \
 148       }                                                                       \
 149   } while (0)
 150
 151
 152 extern void __pthread_unwind (__pthread_unwind_buf_t *__buf)
 153      __cleanup_fct_attribute __attribute ((__noreturn__))
 154 #if !defined SHARED && !defined IS_IN_libpthread
 155      weak_function
 156 #endif
 157      ;
 158 extern void __pthread_unwind_next (__pthread_unwind_buf_t *__buf)
 159      __cleanup_fct_attribute __attribute ((__noreturn__))
 160 #ifndef SHARED
 161      weak_function
 162 #endif
 163      ;
 164 extern void __pthread_register_cancel (__pthread_unwind_buf_t *__buf)
 165      __cleanup_fct_attribute;
 166 extern void __pthread_unregister_cancel (__pthread_unwind_buf_t *__buf)
 167      __cleanup_fct_attribute;
 168 #if defined NOT_IN_libc && defined IS_IN_libpthread
 169 hidden_proto (__pthread_unwind)
 170 hidden_proto (__pthread_unwind_next)
 171 hidden_proto (__pthread_register_cancel)
 172 hidden_proto (__pthread_unregister_cancel)
 173 # ifdef SHARED
 174 extern void attribute_hidden pthread_cancel_init (void);
 175 # endif
 176 #endif
 177
 178
 179 /* Called when a thread reacts on a cancellation request.  */
 180 static inline void
 181 __attribute ((noreturn, always_inline))
 182 __do_cancel (void)
 183 {
 184   struct pthread *self = THREAD_SELF;
 185
 186   /* Make sure we get no more cancellations.  */
 187   THREAD_ATOMIC_BIT_SET (self, cancelhandling, EXITING_BIT);
 188
 189   __pthread_unwind ((__pthread_unwind_buf_t *)
 190                     THREAD_GETMEM (self, cleanup_jmp_buf));
 191 }
 192
 193
 194 /* Set cancellation mode to asynchronous.  */
 195 #define CANCEL_ASYNC() \
 196   __pthread_enable_asynccancel ()
 197 /* Reset to previous cancellation mode.  */
 198 #define CANCEL_RESET(oldtype) \
 199   __pthread_disable_asynccancel (oldtype)
 200
 201 #if !defined NOT_IN_libc
 202 /* Same as CANCEL_ASYNC, but for use in libc.so.  */
 203 # define LIBC_CANCEL_ASYNC() \
 204   __libc_enable_asynccancel ()
 205 /* Same as CANCEL_RESET, but for use in libc.so.  */
 206 # define LIBC_CANCEL_RESET(oldtype) \
 207   __libc_disable_asynccancel (oldtype)
 208 # define LIBC_CANCEL_HANDLED() \
 209   __asm (".globl " __SYMBOL_PREFIX "__libc_enable_asynccancel"); \
 210   __asm (".globl " __SYMBOL_PREFIX "__libc_disable_asynccancel")
 211 #elif defined NOT_IN_libc && defined IS_IN_libpthread
 212 # define LIBC_CANCEL_ASYNC() CANCEL_ASYNC ()
 213 # define LIBC_CANCEL_RESET(val) CANCEL_RESET (val)
 214 # define LIBC_CANCEL_HANDLED() \
 215   __asm (".globl " __SYMBOL_PREFIX "__pthread_enable_asynccancel"); \
 216   __asm (".globl " __SYMBOL_PREFIX "__pthread_disable_asynccancel")
 217 #elif defined NOT_IN_libc && defined IS_IN_librt
 218 # define LIBC_CANCEL_ASYNC() \
 219   __librt_enable_asynccancel ()
 220 # define LIBC_CANCEL_RESET(val) \
 221   __librt_disable_asynccancel (val)
 222 # define LIBC_CANCEL_HANDLED() \
 223   __asm (".globl " __SYMBOL_PREFIX "__librt_enable_asynccancel"); \
 224   __asm (".globl " __SYMBOL_PREFIX "__librt_disable_asynccancel")
 225 #else
 226 # define LIBC_CANCEL_ASYNC()    0 /* Just a dummy value.  */
 227 # define LIBC_CANCEL_RESET(val) ((void)(val)) /* Nothing, but evaluate it.  */
 228 # define LIBC_CANCEL_HANDLED()  /* Nothing.  */
 229 #endif
 230
 231 /* The signal used for asynchronous cancelation.  */
 232 #define SIGCANCEL       __SIGRTMIN
 233
 234
 235 /* Signal needed for the kernel-supported POSIX timer implementation.
 236    We can reuse the cancellation signal since we can distinguish
 237    cancellation from timer expirations.  */
 238 #define SIGTIMER        SIGCANCEL
 239
 240
 241 /* Signal used to implement the setuid et.al. functions.  */
 242 #define SIGSETXID       (__SIGRTMIN + 1)
 243
 244 /* Used to communicate with signal handler.  */
 245 extern struct xid_command *__xidcmd attribute_hidden;
 246
 247
 248 /* Internal prototypes.  */
 249
 250 /* Thread list handling.  */
 251 extern struct pthread *__find_in_stack_list (struct pthread *pd)
 252      attribute_hidden internal_function;
 253
 254 /* Deallocate a thread's stack after optionally making sure the thread
 255    descriptor is still valid.  */
 256 extern void __free_tcb (struct pthread *pd) attribute_hidden internal_function;
 257
 258 /* Free allocated stack.  */
 259 extern void __deallocate_stack (struct pthread *pd)
 260      attribute_hidden internal_function;
 261
 262 /* Mark all the stacks except for the current one as available.  This
 263    function also re-initializes the lock for the stack cache.  */
 264 extern void __reclaim_stacks (void) attribute_hidden;
 265
 266 /* Make all threads's stacks executable.  */
 267 extern int __make_stacks_executable (void **stack_endp)
 268      internal_function attribute_hidden;
 269
 270 /* longjmp handling.  */
 271 extern void __pthread_cleanup_upto (__jmp_buf target, char *targetframe);
 272 #if defined NOT_IN_libc && defined IS_IN_libpthread
 273 hidden_proto (__pthread_cleanup_upto)
 274 #endif
 275
 276
 277 /* Functions with versioned interfaces.  */
 278 extern int __pthread_create_2_1 (pthread_t *newthread,
 279                                  const pthread_attr_t *attr,
 280                                  void *(*start_routine) (void *), void *arg);
 281 extern int __pthread_create_2_0 (pthread_t *newthread,
 282                                  const pthread_attr_t *attr,
 283                                  void *(*start_routine) (void *), void *arg);
 284 extern int __pthread_attr_init_2_1 (pthread_attr_t *attr);
 285 extern int __pthread_attr_init_2_0 (pthread_attr_t *attr);
 286
 287
 288 /* Event handlers for libthread_db interface.  */
 289 extern void __nptl_create_event (void);
 290 extern void __nptl_death_event (void);
 291 hidden_proto (__nptl_create_event)
 292 hidden_proto (__nptl_death_event)
 293
 294 /* Register the generation counter in the libpthread with the libc.  */
 295 #ifdef TLS_MULTIPLE_THREADS_IN_TCB
 296 extern void __libc_pthread_init (unsigned long int *ptr,
 297                                  void (*reclaim) (void),
 298                                  const struct pthread_functions *functions)
 299      internal_function;
 300 #else
 301 extern int *__libc_pthread_init (unsigned long int *ptr,
 302                                  void (*reclaim) (void),
 303                                  const struct pthread_functions *functions)
 304      internal_function;
 305
 306 /* Variable set to a nonzero value if more than one thread runs or ran.  */
 307 extern int __pthread_multiple_threads attribute_hidden;
 308 /* Pointer to the corresponding variable in libc.  */
 309 extern int *__libc_multiple_threads_ptr attribute_hidden;
 310 #endif
 311
 312 /* Find a thread given its TID.  */
 313 extern struct pthread *__find_thread_by_id (pid_t tid) attribute_hidden
 314 #ifdef SHARED
 315 ;
 316 #else
 317 weak_function;
 318 #define __find_thread_by_id(tid) \
 319   (__find_thread_by_id ? (__find_thread_by_id) (tid) : (struct pthread *) NULL)
 320 #endif
 321
 322 extern void __pthread_init_static_tls (struct link_map *) attribute_hidden;
 323
 324
 325 /* Namespace save aliases.  */
 326 extern int __pthread_getschedparam (pthread_t thread_id, int *policy,
 327                                     struct sched_param *param);
 328 extern int __pthread_setschedparam (pthread_t thread_id, int policy,
 329                                     const struct sched_param *param);
 330 extern int __pthread_setcancelstate (int state, int *oldstate);
 331 extern int __pthread_mutex_init (pthread_mutex_t *__mutex,
 332                                  __const pthread_mutexattr_t *__mutexattr);
 333 extern int __pthread_mutex_init_internal (pthread_mutex_t *__mutex,
 334                                           __const pthread_mutexattr_t *__mutexattr)
 335      attribute_hidden;
 336 extern int __pthread_mutex_destroy (pthread_mutex_t *__mutex);
 337 extern int __pthread_mutex_destroy_internal (pthread_mutex_t *__mutex)
 338      attribute_hidden;
 339 extern int __pthread_mutex_trylock (pthread_mutex_t *_mutex);
 340 extern int __pthread_mutex_lock (pthread_mutex_t *__mutex);
 341 extern int __pthread_mutex_lock_internal (pthread_mutex_t *__mutex)
 342      attribute_hidden;
 343 extern int __pthread_mutex_cond_lock (pthread_mutex_t *__mutex)
 344      attribute_hidden internal_function;
 345 extern int __pthread_mutex_unlock (pthread_mutex_t *__mutex);
 346 extern int __pthread_mutex_unlock_internal (pthread_mutex_t *__mutex)
 347      attribute_hidden;
 348 extern int __pthread_mutex_unlock_usercnt (pthread_mutex_t *__mutex,
 349                                            int __decr)
 350      attribute_hidden internal_function;
 351 extern int __pthread_mutexattr_init (pthread_mutexattr_t *attr);
 352 extern int __pthread_mutexattr_destroy (pthread_mutexattr_t *attr);
 353 extern int __pthread_mutexattr_settype (pthread_mutexattr_t *attr, int kind);
 354 extern int __pthread_attr_destroy (pthread_attr_t *attr);
 355 extern int __pthread_attr_getdetachstate (const pthread_attr_t *attr,
 356                                           int *detachstate);
 357 extern int __pthread_attr_setdetachstate (pthread_attr_t *attr,
 358                                           int detachstate);
 359 extern int __pthread_attr_getinheritsched (const pthread_attr_t *attr,
 360                                            int *inherit);
 361 extern int __pthread_attr_setinheritsched (pthread_attr_t *attr, int inherit);
 362 extern int __pthread_attr_getschedparam (const pthread_attr_t *attr,
 363                                          struct sched_param *param);
 364 extern int __pthread_attr_setschedparam (pthread_attr_t *attr,
 365                                          const struct sched_param *param);
 366 extern int __pthread_attr_getschedpolicy (const pthread_attr_t *attr,
 367                                           int *policy);
 368 extern int __pthread_attr_setschedpolicy (pthread_attr_t *attr, int policy);
 369 extern int __pthread_attr_getscope (const pthread_attr_t *attr, int *scope);
 370 extern int __pthread_attr_setscope (pthread_attr_t *attr, int scope);
 371 extern int __pthread_attr_getstackaddr (__const pthread_attr_t *__restrict
 372                                         __attr, void **__restrict __stackaddr);
 373 extern int __pthread_attr_setstackaddr (pthread_attr_t *__attr,
 374                                         void *__stackaddr);
 375 extern int __pthread_attr_getstacksize (__const pthread_attr_t *__restrict
 376                                         __attr,
 377                                         size_t *__restrict __stacksize);
 378 extern int __pthread_attr_setstacksize (pthread_attr_t *__attr,
 379                                         size_t __stacksize);
 380 extern int __pthread_attr_getstack (__const pthread_attr_t *__restrict __attr,
 381                                     void **__restrict __stackaddr,
 382                                     size_t *__restrict __stacksize);
 383 extern int __pthread_attr_setstack (pthread_attr_t *__attr, void *__stackaddr,
 384                                     size_t __stacksize);
 385 extern int __pthread_rwlock_init (pthread_rwlock_t *__restrict __rwlock,
 386                                   __const pthread_rwlockattr_t *__restrict
 387                                   __attr);
 388 extern int __pthread_rwlock_destroy (pthread_rwlock_t *__rwlock);
 389 extern int __pthread_rwlock_rdlock (pthread_rwlock_t *__rwlock);
 390 extern int __pthread_rwlock_rdlock_internal (pthread_rwlock_t *__rwlock);
 391 extern int __pthread_rwlock_tryrdlock (pthread_rwlock_t *__rwlock);
 392 extern int __pthread_rwlock_wrlock (pthread_rwlock_t *__rwlock);
 393 extern int __pthread_rwlock_wrlock_internal (pthread_rwlock_t *__rwlock);
 394 extern int __pthread_rwlock_trywrlock (pthread_rwlock_t *__rwlock);
 395 extern int __pthread_rwlock_unlock (pthread_rwlock_t *__rwlock);
 396 extern int __pthread_rwlock_unlock_internal (pthread_rwlock_t *__rwlock);
 397 extern int __pthread_cond_broadcast (pthread_cond_t *cond);
 398 extern int __pthread_cond_destroy (pthread_cond_t *cond);
 399 extern int __pthread_cond_init (pthread_cond_t *cond,
 400                                 const pthread_condattr_t *cond_attr);
 401 extern int __pthread_cond_signal (pthread_cond_t *cond);
 402 extern int __pthread_cond_wait (pthread_cond_t *cond, pthread_mutex_t *mutex);
 403 extern int __pthread_cond_timedwait (pthread_cond_t *cond,
 404                                      pthread_mutex_t *mutex,
 405                                      const struct timespec *abstime);
 406 extern int __pthread_condattr_destroy (pthread_condattr_t *attr);
 407 extern int __pthread_condattr_init (pthread_condattr_t *attr);
 408 extern int __pthread_key_create (pthread_key_t *key, void (*destr) (void *));
 409 extern int __pthread_key_create_internal (pthread_key_t *key,
 410                                           void (*destr) (void *));
 411 extern void *__pthread_getspecific (pthread_key_t key);
 412 extern void *__pthread_getspecific_internal (pthread_key_t key);
 413 extern int __pthread_setspecific (pthread_key_t key, const void *value);
 414 extern int __pthread_setspecific_internal (pthread_key_t key,
 415                                            const void *value);
 416 extern int __pthread_once (pthread_once_t *once_control,
 417                            void (*init_routine) (void));
 418 extern int __pthread_once_internal (pthread_once_t *once_control,
 419                                     void (*init_routine) (void));
 420 extern int __pthread_atfork (void (*prepare) (void), void (*parent) (void),
 421                              void (*child) (void));
 422 extern pthread_t __pthread_self (void);
 423 extern int __pthread_equal (pthread_t thread1, pthread_t thread2);
 424 extern int __pthread_kill (pthread_t threadid, int signo);
 425 extern void __pthread_exit (void *value);
 426 extern int __pthread_setcanceltype (int type, int *oldtype);
 427 extern int __pthread_enable_asynccancel (void) attribute_hidden;
 428 extern void __pthread_disable_asynccancel (int oldtype)
 429      internal_function attribute_hidden;
 430
 431 extern int __pthread_cond_broadcast_2_0 (pthread_cond_2_0_t *cond);
 432 extern int __pthread_cond_destroy_2_0 (pthread_cond_2_0_t *cond);
 433 extern int __pthread_cond_init_2_0 (pthread_cond_2_0_t *cond,
 434                                     const pthread_condattr_t *cond_attr);
 435 extern int __pthread_cond_signal_2_0 (pthread_cond_2_0_t *cond);
 436 extern int __pthread_cond_timedwait_2_0 (pthread_cond_2_0_t *cond,
 437                                          pthread_mutex_t *mutex,
 438                                          const struct timespec *abstime);
 439 extern int __pthread_cond_wait_2_0 (pthread_cond_2_0_t *cond,
 440                                     pthread_mutex_t *mutex);
 441
 442 extern int __pthread_getaffinity_np (pthread_t th, size_t cpusetsize,
 443                                      cpu_set_t *cpuset);
 444
 445 /* The two functions are in libc.so and not exported.  */
 446 extern int __libc_enable_asynccancel (void) attribute_hidden;
 447 extern void __libc_disable_asynccancel (int oldtype)
 448      internal_function attribute_hidden;
 449
 450
 451 /* The two functions are in librt.so and not exported.  */
 452 extern int __librt_enable_asynccancel (void) attribute_hidden;
 453 extern void __librt_disable_asynccancel (int oldtype)
 454      internal_function attribute_hidden;
 455
 456 #ifdef IS_IN_libpthread
 457 /* Special versions which use non-exported functions.  */
 458 extern void __pthread_cleanup_push (struct _pthread_cleanup_buffer *buffer,
 459                                     void (*routine) (void *), void *arg)
 460      attribute_hidden;
 461 # undef pthread_cleanup_push
 462 # define pthread_cleanup_push(routine,arg) \
 463   { struct _pthread_cleanup_buffer _buffer;                                   \
 464     __pthread_cleanup_push (&_buffer, (routine), (arg));
 465
 466 extern void __pthread_cleanup_pop (struct _pthread_cleanup_buffer *buffer,
 467                                    int execute) attribute_hidden;
 468 # undef pthread_cleanup_pop
 469 # define pthread_cleanup_pop(execute) \
 470     __pthread_cleanup_pop (&_buffer, (execute)); }
 471 #endif
 472
 473 extern void __pthread_cleanup_push_defer (struct _pthread_cleanup_buffer *buffer,
 474                                           void (*routine) (void *), void *arg);
 475 extern void __pthread_cleanup_pop_restore (struct _pthread_cleanup_buffer *buffer,
 476                                            int execute);
 477
 478 /* Old cleanup interfaces, still used in libc.so.  */
 479 extern void _pthread_cleanup_push (struct _pthread_cleanup_buffer *buffer,
 480                                    void (*routine) (void *), void *arg);
 481 extern void _pthread_cleanup_pop (struct _pthread_cleanup_buffer *buffer,
 482                                   int execute);
 483 extern void _pthread_cleanup_push_defer (struct _pthread_cleanup_buffer *buffer,
 484                                          void (*routine) (void *), void *arg);
 485 extern void _pthread_cleanup_pop_restore (struct _pthread_cleanup_buffer *buffer,
 486                                           int execute);
 487
 488 extern void __nptl_deallocate_tsd (void) attribute_hidden;
 489
 490 extern int __nptl_setxid (struct xid_command *cmdp) attribute_hidden;
 491
 492 #ifdef SHARED
 493 # define PTHREAD_STATIC_FN_REQUIRE(name)
 494 #else
 495 # define PTHREAD_STATIC_FN_REQUIRE(name) __asm (".globl " #name);
 496 #endif
 497
 498 #endif  /* pthreadP.h */