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   PTHREAD_MUTEX_PRIO_INHERIT_PRIVATE_NP = 32,
  71   PTHREAD_MUTEX_PRIO_PROTECT_PRIVATE_NP = 64
  72 };
  73 #define PTHREAD_MUTEX_PRIO_CEILING_SHIFT        16
  74 #define PTHREAD_MUTEX_PRIO_CEILING_MASK         0x00ff0000
  75
  76
  77 /* Flags in mutex attr.  */
  78 #define PTHREAD_MUTEXATTR_PROTOCOL_SHIFT        28
  79 #define PTHREAD_MUTEXATTR_PROTOCOL_MASK         0x30000000
  80 #define PTHREAD_MUTEXATTR_PRIO_CEILING_SHIFT    16
  81 #define PTHREAD_MUTEXATTR_PRIO_CEILING_MASK     0x00ff0000
  82 #define PTHREAD_MUTEXATTR_FLAG_ROBUST           0x40000000
  83 #define PTHREAD_MUTEXATTR_FLAG_PSHARED          0x80000000
  84 #define PTHREAD_MUTEXATTR_FLAG_BITS \
  85   (PTHREAD_MUTEXATTR_FLAG_ROBUST | PTHREAD_MUTEXATTR_FLAG_PSHARED \
  86    | PTHREAD_MUTEXATTR_PROTOCOL_MASK | PTHREAD_MUTEXATTR_PRIO_CEILING_MASK)
  87
  88
  89 /* Bits used in robust mutex implementation.  */
  90 #define FUTEX_WAITERS           0x80000000
  91 #define FUTEX_OWNER_DIED        0x40000000
  92 #define FUTEX_TID_MASK          0x1fffffff
  93
  94
  95 /* Internal variables.  */
  96
  97
  98 /* Default stack size.  */
  99 extern size_t __default_stacksize attribute_hidden;
 100
 101 /* Size and alignment of static TLS block.  */
 102 extern size_t __static_tls_size attribute_hidden;
 103 extern size_t __static_tls_align_m1 attribute_hidden;
 104
 105 /* Flag whether the machine is SMP or not.  */
 106 extern int __is_smp attribute_hidden;
 107
 108 /* Thread descriptor handling.  */
 109 extern list_t __stack_user;
 110 hidden_proto (__stack_user)
 111
 112 /* Attribute handling.  */
 113 extern struct pthread_attr *__attr_list attribute_hidden;
 114 extern lll_lock_t __attr_list_lock attribute_hidden;
 115
 116 /* First available RT signal.  */
 117 extern int __current_sigrtmin attribute_hidden;
 118 /* Last available RT signal.  */
 119 extern int __current_sigrtmax attribute_hidden;
 120
 121 /* Concurrency handling.  */
 122 extern int __concurrency_level attribute_hidden;
 123
 124 /* Thread-local data key handling.  */
 125 extern struct pthread_key_struct __pthread_keys[PTHREAD_KEYS_MAX];
 126 hidden_proto (__pthread_keys)
 127
 128 /* Number of threads running.  */
 129 extern unsigned int __nptl_nthreads attribute_hidden;
 130
 131 /* The library can run in debugging mode where it performs a lot more
 132    tests.  */
 133 extern int __pthread_debug attribute_hidden;
 134 /** For now disable debugging support.  */
 135 #if 0
 136 # define DEBUGGING_P __builtin_expect (__pthread_debug, 0)
 137 # define INVALID_TD_P(pd) (DEBUGGING_P && __find_in_stack_list (pd) == NULL)
 138 # define INVALID_NOT_TERMINATED_TD_P(pd) INVALID_TD_P (pd)
 139 #else
 140 # define DEBUGGING_P 0
 141 /* Simplified test.  This will not catch all invalid descriptors but
 142    is better than nothing.  And if the test triggers the thread
 143    descriptor is guaranteed to be invalid.  */
 144 # define INVALID_TD_P(pd) __builtin_expect ((pd)->tid <= 0, 0)
 145 # define INVALID_NOT_TERMINATED_TD_P(pd) __builtin_expect ((pd)->tid < 0, 0)
 146 #endif
 147
 148
 149 /* Cancellation test.  */
 150 #define CANCELLATION_P(self) \
 151   do {                                                                        \
 152     int cancelhandling = THREAD_GETMEM (self, cancelhandling);                \
 153     if (CANCEL_ENABLED_AND_CANCELED (cancelhandling))                         \
 154       {                                                                       \
 155         THREAD_SETMEM (self, result, PTHREAD_CANCELED);                       \
 156         __do_cancel ();                                                       \
 157       }                                                                       \
 158   } while (0)
 159
 160
 161 extern void __pthread_unwind (__pthread_unwind_buf_t *__buf)
 162      __cleanup_fct_attribute __attribute ((__noreturn__))
 163 #if !defined SHARED && !defined IS_IN_libpthread
 164      weak_function
 165 #endif
 166      ;
 167 extern void __pthread_unwind_next (__pthread_unwind_buf_t *__buf)
 168      __cleanup_fct_attribute __attribute ((__noreturn__))
 169 #ifndef SHARED
 170      weak_function
 171 #endif
 172      ;
 173 extern void __pthread_register_cancel (__pthread_unwind_buf_t *__buf)
 174      __cleanup_fct_attribute;
 175 extern void __pthread_unregister_cancel (__pthread_unwind_buf_t *__buf)
 176      __cleanup_fct_attribute;
 177 #if defined NOT_IN_libc && defined IS_IN_libpthread
 178 hidden_proto (__pthread_unwind)
 179 hidden_proto (__pthread_unwind_next)
 180 hidden_proto (__pthread_register_cancel)
 181 hidden_proto (__pthread_unregister_cancel)
 182 # ifdef SHARED
 183 extern void attribute_hidden pthread_cancel_init (void);
 184 # endif
 185 #endif
 186
 187
 188 /* Called when a thread reacts on a cancellation request.  */
 189 static inline void
 190 __attribute ((noreturn, always_inline))
 191 __do_cancel (void)
 192 {
 193   struct pthread *self = THREAD_SELF;
 194
 195   /* Make sure we get no more cancellations.  */
 196   THREAD_ATOMIC_BIT_SET (self, cancelhandling, EXITING_BIT);
 197
 198   __pthread_unwind ((__pthread_unwind_buf_t *)
 199                     THREAD_GETMEM (self, cleanup_jmp_buf));
 200 }
 201
 202
 203 /* Set cancellation mode to asynchronous.  */
 204 #define CANCEL_ASYNC() \
 205   __pthread_enable_asynccancel ()
 206 /* Reset to previous cancellation mode.  */
 207 #define CANCEL_RESET(oldtype) \
 208   __pthread_disable_asynccancel (oldtype)
 209
 210 #if !defined NOT_IN_libc
 211 /* Same as CANCEL_ASYNC, but for use in libc.so.  */
 212 # define LIBC_CANCEL_ASYNC() \
 213   __libc_enable_asynccancel ()
 214 /* Same as CANCEL_RESET, but for use in libc.so.  */
 215 # define LIBC_CANCEL_RESET(oldtype) \
 216   __libc_disable_asynccancel (oldtype)
 217 # define LIBC_CANCEL_HANDLED() \
 218   __asm (".globl " __SYMBOL_PREFIX "__libc_enable_asynccancel"); \
 219   __asm (".globl " __SYMBOL_PREFIX "__libc_disable_asynccancel")
 220 #elif defined NOT_IN_libc && defined IS_IN_libpthread
 221 # define LIBC_CANCEL_ASYNC() CANCEL_ASYNC ()
 222 # define LIBC_CANCEL_RESET(val) CANCEL_RESET (val)
 223 # define LIBC_CANCEL_HANDLED() \
 224   __asm (".globl " __SYMBOL_PREFIX "__pthread_enable_asynccancel"); \
 225   __asm (".globl " __SYMBOL_PREFIX "__pthread_disable_asynccancel")
 226 #elif defined NOT_IN_libc && defined IS_IN_librt
 227 # define LIBC_CANCEL_ASYNC() \
 228   __librt_enable_asynccancel ()
 229 # define LIBC_CANCEL_RESET(val) \
 230   __librt_disable_asynccancel (val)
 231 # define LIBC_CANCEL_HANDLED() \
 232   __asm (".globl " __SYMBOL_PREFIX "__librt_enable_asynccancel"); \
 233   __asm (".globl " __SYMBOL_PREFIX "__librt_disable_asynccancel")
 234 #else
 235 # define LIBC_CANCEL_ASYNC()    0 /* Just a dummy value.  */
 236 # define LIBC_CANCEL_RESET(val) ((void)(val)) /* Nothing, but evaluate it.  */
 237 # define LIBC_CANCEL_HANDLED()  /* Nothing.  */
 238 #endif
 239
 240 /* The signal used for asynchronous cancelation.  */
 241 #define SIGCANCEL       __SIGRTMIN
 242
 243
 244 /* Signal needed for the kernel-supported POSIX timer implementation.
 245    We can reuse the cancellation signal since we can distinguish
 246    cancellation from timer expirations.  */
 247 #define SIGTIMER        SIGCANCEL
 248
 249
 250 /* Signal used to implement the setuid et.al. functions.  */
 251 #define SIGSETXID       (__SIGRTMIN + 1)
 252
 253 /* Used to communicate with signal handler.  */
 254 extern struct xid_command *__xidcmd attribute_hidden;
 255
 256
 257 /* Internal prototypes.  */
 258
 259 /* Thread list handling.  */
 260 extern struct pthread *__find_in_stack_list (struct pthread *pd)
 261      attribute_hidden internal_function;
 262
 263 /* Deallocate a thread's stack after optionally making sure the thread
 264    descriptor is still valid.  */
 265 extern void __free_tcb (struct pthread *pd) attribute_hidden internal_function;
 266
 267 /* Free allocated stack.  */
 268 extern void __deallocate_stack (struct pthread *pd)
 269      attribute_hidden internal_function;
 270
 271 /* Mark all the stacks except for the current one as available.  This
 272    function also re-initializes the lock for the stack cache.  */
 273 extern void __reclaim_stacks (void) attribute_hidden;
 274
 275 /* Make all threads's stacks executable.  */
 276 extern int __make_stacks_executable (void **stack_endp)
 277      internal_function attribute_hidden;
 278
 279 /* longjmp handling.  */
 280 extern void __pthread_cleanup_upto (__jmp_buf target, char *targetframe);
 281 #if defined NOT_IN_libc && defined IS_IN_libpthread
 282 hidden_proto (__pthread_cleanup_upto)
 283 #endif
 284
 285
 286 /* Functions with versioned interfaces.  */
 287 extern int __pthread_create_2_1 (pthread_t *newthread,
 288                                  const pthread_attr_t *attr,
 289                                  void *(*start_routine) (void *), void *arg);
 290 extern int __pthread_create_2_0 (pthread_t *newthread,
 291                                  const pthread_attr_t *attr,
 292                                  void *(*start_routine) (void *), void *arg);
 293 extern int __pthread_attr_init_2_1 (pthread_attr_t *attr);
 294 extern int __pthread_attr_init_2_0 (pthread_attr_t *attr);
 295
 296
 297 /* Event handlers for libthread_db interface.  */
 298 extern void __nptl_create_event (void);
 299 extern void __nptl_death_event (void);
 300 hidden_proto (__nptl_create_event)
 301 hidden_proto (__nptl_death_event)
 302
 303 /* Register the generation counter in the libpthread with the libc.  */
 304 #ifdef TLS_MULTIPLE_THREADS_IN_TCB
 305 extern void __libc_pthread_init (unsigned long int *ptr,
 306                                  void (*reclaim) (void),
 307                                  const struct pthread_functions *functions)
 308      internal_function;
 309 #else
 310 extern int *__libc_pthread_init (unsigned long int *ptr,
 311                                  void (*reclaim) (void),
 312                                  const struct pthread_functions *functions)
 313      internal_function;
 314
 315 /* Variable set to a nonzero value if more than one thread runs or ran.  */
 316 extern int __pthread_multiple_threads attribute_hidden;
 317 /* Pointer to the corresponding variable in libc.  */
 318 extern int *__libc_multiple_threads_ptr attribute_hidden;
 319 #endif
 320
 321 /* Find a thread given its TID.  */
 322 extern struct pthread *__find_thread_by_id (pid_t tid) attribute_hidden
 323 #ifdef SHARED
 324 ;
 325 #else
 326 weak_function;
 327 #define __find_thread_by_id(tid) \
 328   (__find_thread_by_id ? (__find_thread_by_id) (tid) : (struct pthread *) NULL)
 329 #endif
 330
 331 extern void __pthread_init_static_tls (struct link_map *) attribute_hidden;
 332
 333
 334 /* Namespace save aliases.  */
 335 extern int __pthread_getschedparam (pthread_t thread_id, int *policy,
 336                                     struct sched_param *param);
 337 extern int __pthread_setschedparam (pthread_t thread_id, int policy,
 338                                     const struct sched_param *param);
 339 extern int __pthread_setcancelstate (int state, int *oldstate);
 340 extern int __pthread_mutex_init (pthread_mutex_t *__mutex,
 341                                  __const pthread_mutexattr_t *__mutexattr);
 342 extern int __pthread_mutex_init_internal (pthread_mutex_t *__mutex,
 343                                           __const pthread_mutexattr_t *__mutexattr)
 344      attribute_hidden;
 345 extern int __pthread_mutex_destroy (pthread_mutex_t *__mutex);
 346 extern int __pthread_mutex_destroy_internal (pthread_mutex_t *__mutex)
 347      attribute_hidden;
 348 extern int __pthread_mutex_trylock (pthread_mutex_t *_mutex);
 349 extern int __pthread_mutex_lock (pthread_mutex_t *__mutex);
 350 extern int __pthread_mutex_lock_internal (pthread_mutex_t *__mutex)
 351      attribute_hidden;
 352 extern int __pthread_mutex_cond_lock (pthread_mutex_t *__mutex)
 353      attribute_hidden internal_function;
 354 extern int __pthread_mutex_unlock (pthread_mutex_t *__mutex);
 355 extern int __pthread_mutex_unlock_internal (pthread_mutex_t *__mutex)
 356      attribute_hidden;
 357 extern int __pthread_mutex_unlock_usercnt (pthread_mutex_t *__mutex,
 358                                            int __decr)
 359      attribute_hidden internal_function;
 360 extern int __pthread_mutexattr_init (pthread_mutexattr_t *attr);
 361 extern int __pthread_mutexattr_destroy (pthread_mutexattr_t *attr);
 362 extern int __pthread_mutexattr_settype (pthread_mutexattr_t *attr, int kind);
 363 extern int __pthread_attr_destroy (pthread_attr_t *attr);
 364 extern int __pthread_attr_getdetachstate (const pthread_attr_t *attr,
 365                                           int *detachstate);
 366 extern int __pthread_attr_setdetachstate (pthread_attr_t *attr,
 367                                           int detachstate);
 368 extern int __pthread_attr_getinheritsched (const pthread_attr_t *attr,
 369                                            int *inherit);
 370 extern int __pthread_attr_setinheritsched (pthread_attr_t *attr, int inherit);
 371 extern int __pthread_attr_getschedparam (const pthread_attr_t *attr,
 372                                          struct sched_param *param);
 373 extern int __pthread_attr_setschedparam (pthread_attr_t *attr,
 374                                          const struct sched_param *param);
 375 extern int __pthread_attr_getschedpolicy (const pthread_attr_t *attr,
 376                                           int *policy);
 377 extern int __pthread_attr_setschedpolicy (pthread_attr_t *attr, int policy);
 378 extern int __pthread_attr_getscope (const pthread_attr_t *attr, int *scope);
 379 extern int __pthread_attr_setscope (pthread_attr_t *attr, int scope);
 380 extern int __pthread_attr_getstackaddr (__const pthread_attr_t *__restrict
 381                                         __attr, void **__restrict __stackaddr);
 382 extern int __pthread_attr_setstackaddr (pthread_attr_t *__attr,
 383                                         void *__stackaddr);
 384 extern int __pthread_attr_getstacksize (__const pthread_attr_t *__restrict
 385                                         __attr,
 386                                         size_t *__restrict __stacksize);
 387 extern int __pthread_attr_setstacksize (pthread_attr_t *__attr,
 388                                         size_t __stacksize);
 389 extern int __pthread_attr_getstack (__const pthread_attr_t *__restrict __attr,
 390                                     void **__restrict __stackaddr,
 391                                     size_t *__restrict __stacksize);
 392 extern int __pthread_attr_setstack (pthread_attr_t *__attr, void *__stackaddr,
 393                                     size_t __stacksize);
 394 extern int __pthread_rwlock_init (pthread_rwlock_t *__restrict __rwlock,
 395                                   __const pthread_rwlockattr_t *__restrict
 396                                   __attr);
 397 extern int __pthread_rwlock_destroy (pthread_rwlock_t *__rwlock);
 398 extern int __pthread_rwlock_rdlock (pthread_rwlock_t *__rwlock);
 399 extern int __pthread_rwlock_rdlock_internal (pthread_rwlock_t *__rwlock);
 400 extern int __pthread_rwlock_tryrdlock (pthread_rwlock_t *__rwlock);
 401 extern int __pthread_rwlock_wrlock (pthread_rwlock_t *__rwlock);
 402 extern int __pthread_rwlock_wrlock_internal (pthread_rwlock_t *__rwlock);
 403 extern int __pthread_rwlock_trywrlock (pthread_rwlock_t *__rwlock);
 404 extern int __pthread_rwlock_unlock (pthread_rwlock_t *__rwlock);
 405 extern int __pthread_rwlock_unlock_internal (pthread_rwlock_t *__rwlock);
 406 extern int __pthread_cond_broadcast (pthread_cond_t *cond);
 407 extern int __pthread_cond_destroy (pthread_cond_t *cond);
 408 extern int __pthread_cond_init (pthread_cond_t *cond,
 409                                 const pthread_condattr_t *cond_attr);
 410 extern int __pthread_cond_signal (pthread_cond_t *cond);
 411 extern int __pthread_cond_wait (pthread_cond_t *cond, pthread_mutex_t *mutex);
 412 extern int __pthread_cond_timedwait (pthread_cond_t *cond,
 413                                      pthread_mutex_t *mutex,
 414                                      const struct timespec *abstime);
 415 extern int __pthread_condattr_destroy (pthread_condattr_t *attr);
 416 extern int __pthread_condattr_init (pthread_condattr_t *attr);
 417 extern int __pthread_key_create (pthread_key_t *key, void (*destr) (void *));
 418 extern int __pthread_key_create_internal (pthread_key_t *key,
 419                                           void (*destr) (void *));
 420 extern void *__pthread_getspecific (pthread_key_t key);
 421 extern void *__pthread_getspecific_internal (pthread_key_t key);
 422 extern int __pthread_setspecific (pthread_key_t key, const void *value);
 423 extern int __pthread_setspecific_internal (pthread_key_t key,
 424                                            const void *value);
 425 extern int __pthread_once (pthread_once_t *once_control,
 426                            void (*init_routine) (void));
 427 extern int __pthread_once_internal (pthread_once_t *once_control,
 428                                     void (*init_routine) (void));
 429 extern int __pthread_atfork (void (*prepare) (void), void (*parent) (void),
 430                              void (*child) (void));
 431 extern pthread_t __pthread_self (void);
 432 extern int __pthread_equal (pthread_t thread1, pthread_t thread2);
 433 extern int __pthread_kill (pthread_t threadid, int signo);
 434 extern void __pthread_exit (void *value);
 435 extern int __pthread_setcanceltype (int type, int *oldtype);
 436 extern int __pthread_enable_asynccancel (void) attribute_hidden;
 437 extern void __pthread_disable_asynccancel (int oldtype)
 438      internal_function attribute_hidden;
 439
 440 extern int __pthread_cond_broadcast_2_0 (pthread_cond_2_0_t *cond);
 441 extern int __pthread_cond_destroy_2_0 (pthread_cond_2_0_t *cond);
 442 extern int __pthread_cond_init_2_0 (pthread_cond_2_0_t *cond,
 443                                     const pthread_condattr_t *cond_attr);
 444 extern int __pthread_cond_signal_2_0 (pthread_cond_2_0_t *cond);
 445 extern int __pthread_cond_timedwait_2_0 (pthread_cond_2_0_t *cond,
 446                                          pthread_mutex_t *mutex,
 447                                          const struct timespec *abstime);
 448 extern int __pthread_cond_wait_2_0 (pthread_cond_2_0_t *cond,
 449                                     pthread_mutex_t *mutex);
 450
 451 extern int __pthread_getaffinity_np (pthread_t th, size_t cpusetsize,
 452                                      cpu_set_t *cpuset);
 453
 454 /* The two functions are in libc.so and not exported.  */
 455 extern int __libc_enable_asynccancel (void) attribute_hidden;
 456 extern void __libc_disable_asynccancel (int oldtype)
 457      internal_function attribute_hidden;
 458
 459
 460 /* The two functions are in librt.so and not exported.  */
 461 extern int __librt_enable_asynccancel (void) attribute_hidden;
 462 extern void __librt_disable_asynccancel (int oldtype)
 463      internal_function attribute_hidden;
 464
 465 #ifdef IS_IN_libpthread
 466 /* Special versions which use non-exported functions.  */
 467 extern void __pthread_cleanup_push (struct _pthread_cleanup_buffer *buffer,
 468                                     void (*routine) (void *), void *arg)
 469      attribute_hidden;
 470 # undef pthread_cleanup_push
 471 # define pthread_cleanup_push(routine,arg) \
 472   { struct _pthread_cleanup_buffer _buffer;                                   \
 473     __pthread_cleanup_push (&_buffer, (routine), (arg));
 474
 475 extern void __pthread_cleanup_pop (struct _pthread_cleanup_buffer *buffer,
 476                                    int execute) attribute_hidden;
 477 # undef pthread_cleanup_pop
 478 # define pthread_cleanup_pop(execute) \
 479     __pthread_cleanup_pop (&_buffer, (execute)); }
 480 #endif
 481
 482 extern void __pthread_cleanup_push_defer (struct _pthread_cleanup_buffer *buffer,
 483                                           void (*routine) (void *), void *arg);
 484 extern void __pthread_cleanup_pop_restore (struct _pthread_cleanup_buffer *buffer,
 485                                            int execute);
 486
 487 /* Old cleanup interfaces, still used in libc.so.  */
 488 extern void _pthread_cleanup_push (struct _pthread_cleanup_buffer *buffer,
 489                                    void (*routine) (void *), void *arg);
 490 extern void _pthread_cleanup_pop (struct _pthread_cleanup_buffer *buffer,
 491                                   int execute);
 492 extern void _pthread_cleanup_push_defer (struct _pthread_cleanup_buffer *buffer,
 493                                          void (*routine) (void *), void *arg);
 494 extern void _pthread_cleanup_pop_restore (struct _pthread_cleanup_buffer *buffer,
 495                                           int execute);
 496
 497 extern void __nptl_deallocate_tsd (void) attribute_hidden;
 498
 499 extern int __nptl_setxid (struct xid_command *cmdp) attribute_hidden;
 500
 501 #ifdef SHARED
 502 # define PTHREAD_STATIC_FN_REQUIRE(name)
 503 #else
 504 # define PTHREAD_STATIC_FN_REQUIRE(name) __asm (".globl " #name);
 505 #endif
 506
 507 #endif  /* pthreadP.h */