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: #define PTHREAD_MUTEX_PSHARED_BIT 128
  100: 
  101: #define PTHREAD_MUTEX_TYPE(m) \
  102:   ((m)->__data.__kind & 127)
  103: 
  104: #if LLL_PRIVATE == 0 && LLL_SHARED == 128
  105: # define PTHREAD_MUTEX_PSHARED(m) \
  106:   ((m)->__data.__kind & 128)
  107: #else
  108: # define PTHREAD_MUTEX_PSHARED(m) \
  109:   (((m)->__data.__kind & 128) ? LLL_SHARED : LLL_PRIVATE)
  110: #endif
  111: 
  112: /* The kernel when waking robust mutexes on exit never uses
  113:    FUTEX_PRIVATE_FLAG FUTEX_WAKE.  */
  114: #define PTHREAD_ROBUST_MUTEX_PSHARED(m) LLL_SHARED
  115: 
  116: /* Ceiling in __data.__lock.  __data.__lock is signed, so don't
  117:    use the MSB bit in there, but in the mask also include that bit,
  118:    so that the compiler can optimize & PTHREAD_MUTEX_PRIO_CEILING_MASK
  119:    masking if the value is then shifted down by
  120:    PTHREAD_MUTEX_PRIO_CEILING_SHIFT.  */
  121: #define PTHREAD_MUTEX_PRIO_CEILING_SHIFT        19
  122: #define PTHREAD_MUTEX_PRIO_CEILING_MASK         0xfff80000
  123: 
  124: 
  125: /* Flags in mutex attr.  */
  126: #define PTHREAD_MUTEXATTR_PROTOCOL_SHIFT        28
  127: #define PTHREAD_MUTEXATTR_PROTOCOL_MASK         0x30000000
  128: #define PTHREAD_MUTEXATTR_PRIO_CEILING_SHIFT    12
  129: #define PTHREAD_MUTEXATTR_PRIO_CEILING_MASK     0x00fff000
  130: #define PTHREAD_MUTEXATTR_FLAG_ROBUST           0x40000000
  131: #define PTHREAD_MUTEXATTR_FLAG_PSHARED          0x80000000
  132: #define PTHREAD_MUTEXATTR_FLAG_BITS \
  133:   (PTHREAD_MUTEXATTR_FLAG_ROBUST | PTHREAD_MUTEXATTR_FLAG_PSHARED \
  134:    | PTHREAD_MUTEXATTR_PROTOCOL_MASK | PTHREAD_MUTEXATTR_PRIO_CEILING_MASK)
  135: 
  136: 
  137: /* Check whether rwlock prefers readers.   */
  138: #define PTHREAD_RWLOCK_PREFER_READER_P(rwlock) \
  139:   ((rwlock)->__data.__flags == 0)
  140: 
  141: 
  142: /* Bits used in robust mutex implementation.  */
  143: #define FUTEX_WAITERS           0x80000000
  144: #define FUTEX_OWNER_DIED        0x40000000
  145: #define FUTEX_TID_MASK          0x3fffffff
  146: 
  147: 
  148: /* Internal variables.  */
  149: 
  150: 
  151: /* Default stack size.  */
  152: extern size_t __default_stacksize attribute_hidden;
  153: 
  154: /* Size and alignment of static TLS block.  */
  155: extern size_t __static_tls_size attribute_hidden;
  156: extern size_t __static_tls_align_m1 attribute_hidden;
  157: 
  158: /* Flag whether the machine is SMP or not.  */
  159: extern int __is_smp attribute_hidden;
  160: 
  161: /* Thread descriptor handling.  */
  162: extern list_t __stack_user;
  163: hidden_proto (__stack_user)
  164: 
  165: /* Attribute handling.  */
  166: extern struct pthread_attr *__attr_list attribute_hidden;
  167: extern int __attr_list_lock attribute_hidden;
  168: 
  169: /* First available RT signal.  */
  170: extern int __current_sigrtmin attribute_hidden;
  171: /* Last available RT signal.  */
  172: extern int __current_sigrtmax attribute_hidden;
  173: 
  174: /* Concurrency handling.  */
  175: extern int __concurrency_level attribute_hidden;
  176: 
  177: /* Thread-local data key handling.  */
  178: extern struct pthread_key_struct __pthread_keys[PTHREAD_KEYS_MAX];
  179: hidden_proto (__pthread_keys)
  180: 
  181: /* Number of threads running.  */
  182: extern unsigned int __nptl_nthreads attribute_hidden;
  183: 
  184: #ifndef __ASSUME_SET_ROBUST_LIST
  185: /* Negative if we do not have the system call and we can use it.  */
  186: extern int __set_robust_list_avail attribute_hidden;
  187: #endif
  188: 
  189: /* Thread Priority Protection.  */
  190: extern int __sched_fifo_min_prio attribute_hidden;
  191: extern int __sched_fifo_max_prio attribute_hidden;
  192: extern void __init_sched_fifo_prio (void) attribute_hidden;
  193: extern int __pthread_tpp_change_priority (int prev_prio, int new_prio)
  194:      attribute_hidden;
  195: extern int __pthread_current_priority (void) attribute_hidden;
  196: 
  197: /* The library can run in debugging mode where it performs a lot more
  198:    tests.  */
  199: extern int __pthread_debug attribute_hidden;
  200: /** For now disable debugging support.  */
  201: #if 0
  202: # define DEBUGGING_P __builtin_expect (__pthread_debug, 0)
  203: # define INVALID_TD_P(pd) (DEBUGGING_P && __find_in_stack_list (pd) == NULL)
  204: # define INVALID_NOT_TERMINATED_TD_P(pd) INVALID_TD_P (pd)
  205: #else
  206: # define DEBUGGING_P 0
  207: /* Simplified test.  This will not catch all invalid descriptors but
  208:    is better than nothing.  And if the test triggers the thread
  209:    descriptor is guaranteed to be invalid.  */
  210: # define INVALID_TD_P(pd) __builtin_expect ((pd)->tid <= 0, 0)
  211: # define INVALID_NOT_TERMINATED_TD_P(pd) __builtin_expect ((pd)->tid < 0, 0)
  212: #endif
  213: 
  214: 
  215: /* Cancellation test.  */
  216: #define CANCELLATION_P(self) \
  217:   do {                                                                        \
  218:     int cancelhandling = THREAD_GETMEM (self, cancelhandling);                \
  219:     if (CANCEL_ENABLED_AND_CANCELED (cancelhandling))                         \
  220:       {                                                                       \
  221:         THREAD_SETMEM (self, result, PTHREAD_CANCELED);                              \
  222:         __do_cancel ();                                                              \
  223:       }                                                                       \
  224:   } while (0)
  225: 
  226: 
  227: extern void __pthread_unwind (__pthread_unwind_buf_t *__buf)
  228:      __cleanup_fct_attribute __attribute ((__noreturn__))
  229: #if !defined SHARED && !defined IS_IN_libpthread
  230:      weak_function
  231: #endif
  232:      ;
  233: extern void __pthread_unwind_next (__pthread_unwind_buf_t *__buf)
  234:      __cleanup_fct_attribute __attribute ((__noreturn__))
  235: #ifndef SHARED
  236:      weak_function
  237: #endif
  238:      ;
  239: extern void __pthread_register_cancel (__pthread_unwind_buf_t *__buf)
  240:      __cleanup_fct_attribute;
  241: extern void __pthread_unregister_cancel (__pthread_unwind_buf_t *__buf)
  242:      __cleanup_fct_attribute;
  243: #if defined NOT_IN_libc && defined IS_IN_libpthread
  244: hidden_proto (__pthread_unwind)
  245: hidden_proto (__pthread_unwind_next)
  246: hidden_proto (__pthread_register_cancel)
  247: hidden_proto (__pthread_unregister_cancel)
  248: # ifdef SHARED
  249: extern void attribute_hidden pthread_cancel_init (void);
  250: # endif
  251: #endif
  252: 
  253: 
  254: /* Called when a thread reacts on a cancellation request.  */
  255: static inline void
  256: __attribute ((noreturn, always_inline))
  257: __do_cancel (void)
  258: {
  259:   struct pthread *self = THREAD_SELF;
  260: 
  261:   /* Make sure we get no more cancellations.  */
  262:   THREAD_ATOMIC_BIT_SET (self, cancelhandling, EXITING_BIT);
  263: 
  264:   __pthread_unwind ((__pthread_unwind_buf_t *)
  265:                     THREAD_GETMEM (self, cleanup_jmp_buf));
  266: }
  267: 
  268: 
  269: /* Set cancellation mode to asynchronous.  */
  270: #define CANCEL_ASYNC() \
  271:   __pthread_enable_asynccancel ()
  272: /* Reset to previous cancellation mode.  */
  273: #define CANCEL_RESET(oldtype) \
  274:   __pthread_disable_asynccancel (oldtype)
  275: 
  276: #if !defined NOT_IN_libc
  277: /* Same as CANCEL_ASYNC, but for use in libc.so.  */
  278: # define LIBC_CANCEL_ASYNC() \
  279:   __libc_enable_asynccancel ()
  280: /* Same as CANCEL_RESET, but for use in libc.so.  */
  281: # define LIBC_CANCEL_RESET(oldtype) \
  282:   __libc_disable_asynccancel (oldtype)
  283: # define LIBC_CANCEL_HANDLED() \
  284:   __asm (".globl " __SYMBOL_PREFIX "__libc_enable_asynccancel"); \
  285:   __asm (".globl " __SYMBOL_PREFIX "__libc_disable_asynccancel")
  286: #elif defined NOT_IN_libc && defined IS_IN_libpthread
  287: # define LIBC_CANCEL_ASYNC() CANCEL_ASYNC ()
  288: # define LIBC_CANCEL_RESET(val) CANCEL_RESET (val)
  289: # define LIBC_CANCEL_HANDLED() \
  290:   __asm (".globl " __SYMBOL_PREFIX "__pthread_enable_asynccancel"); \
  291:   __asm (".globl " __SYMBOL_PREFIX "__pthread_disable_asynccancel")
  292: #elif defined NOT_IN_libc && defined IS_IN_librt
  293: # define LIBC_CANCEL_ASYNC() \
  294:   __librt_enable_asynccancel ()
  295: # define LIBC_CANCEL_RESET(val) \
  296:   __librt_disable_asynccancel (val)
  297: # define LIBC_CANCEL_HANDLED() \
  298:   __asm (".globl " __SYMBOL_PREFIX "__librt_enable_asynccancel"); \
  299:   __asm (".globl " __SYMBOL_PREFIX "__librt_disable_asynccancel")
  300: #else
  301: # define LIBC_CANCEL_ASYNC()    0 /* Just a dummy value.  */
  302: # define LIBC_CANCEL_RESET(val) ((void)(val)) /* Nothing, but evaluate it.  */
  303: # define LIBC_CANCEL_HANDLED()  /* Nothing.  */
  304: #endif
  305: 
  306: /* The signal used for asynchronous cancelation.  */
  307: #define SIGCANCEL       __SIGRTMIN
  308: 
  309: 
  310: /* Signal needed for the kernel-supported POSIX timer implementation.
  311:    We can reuse the cancellation signal since we can distinguish
  312:    cancellation from timer expirations.  */
  313: #define SIGTIMER        SIGCANCEL
  314: 
  315: 
  316: /* Signal used to implement the setuid et.al. functions.  */
  317: #define SIGSETXID       (__SIGRTMIN + 1)
  318: 
  319: /* Used to communicate with signal handler.  */
  320: extern struct xid_command *__xidcmd attribute_hidden;
  321: 
  322: 
  323: /* Internal prototypes.  */
  324: 
  325: /* Thread list handling.  */
  326: extern struct pthread *__find_in_stack_list (struct pthread *pd)
  327:      attribute_hidden internal_function;
  328: 
  329: /* Deallocate a thread's stack after optionally making sure the thread
  330:    descriptor is still valid.  */
  331: extern void __free_tcb (struct pthread *pd) attribute_hidden internal_function;
  332: 
  333: /* Free allocated stack.  */
  334: extern void __deallocate_stack (struct pthread *pd)
  335:      attribute_hidden internal_function;
  336: 
  337: /* Mark all the stacks except for the current one as available.  This
  338:    function also re-initializes the lock for the stack cache.  */
  339: extern void __reclaim_stacks (void) attribute_hidden;
  340: 
  341: /* Make all threads's stacks executable.  */
  342: extern int __make_stacks_executable (void **stack_endp)
  343:      internal_function attribute_hidden;
  344: 
  345: /* longjmp handling.  */
  346: extern void __pthread_cleanup_upto (__jmp_buf target, char *targetframe);
  347: #if defined NOT_IN_libc && defined IS_IN_libpthread
  348: hidden_proto (__pthread_cleanup_upto)
  349: #endif
  350: 
  351: 
  352: /* Functions with versioned interfaces.  */
  353: extern int __pthread_create_2_1 (pthread_t *newthread,
  354:                                  const pthread_attr_t *attr,
  355:                                  void *(*start_routine) (void *), void *arg);
  356: extern int __pthread_create_2_0 (pthread_t *newthread,
  357:                                  const pthread_attr_t *attr,
  358:                                  void *(*start_routine) (void *), void *arg);
  359: extern int __pthread_attr_init_2_1 (pthread_attr_t *attr);
  360: extern int __pthread_attr_init_2_0 (pthread_attr_t *attr);
  361: 
  362: 
  363: /* Event handlers for libthread_db interface.  */
  364: extern void __nptl_create_event (void);
  365: extern void __nptl_death_event (void);
  366: hidden_proto (__nptl_create_event)
  367: hidden_proto (__nptl_death_event)
  368: 
  369: /* Register the generation counter in the libpthread with the libc.  */
  370: #ifdef TLS_MULTIPLE_THREADS_IN_TCB
  371: extern void __libc_pthread_init (unsigned long int *ptr,
  372:                                  void (*reclaim) (void),
  373:                                  const struct pthread_functions *functions)
  374:      internal_function;
  375: #else
  376: extern int *__libc_pthread_init (unsigned long int *ptr,
  377:                                  void (*reclaim) (void),
  378:                                  const struct pthread_functions *functions)
  379:      internal_function;
  380: 
  381: /* Variable set to a nonzero value if more than one thread runs or ran.  */
  382: extern int __pthread_multiple_threads attribute_hidden;
  383: /* Pointer to the corresponding variable in libc.  */
  384: extern int *__libc_multiple_threads_ptr attribute_hidden;
  385: #endif
  386: 
  387: /* Find a thread given its TID.  */
  388: extern struct pthread *__find_thread_by_id (pid_t tid) attribute_hidden
  389: #ifdef SHARED
  390: ;
  391: #else
  392: weak_function;
  393: #define __find_thread_by_id(tid) \
  394:   (__find_thread_by_id ? (__find_thread_by_id) (tid) : (struct pthread *) NULL)
  395: #endif
  396: 
  397: extern void __pthread_init_static_tls (struct link_map *) attribute_hidden;
  398: 
  399: 
  400: /* Namespace save aliases.  */
  401: extern int __pthread_getschedparam (pthread_t thread_id, int *policy,
  402:                                     struct sched_param *param);
  403: extern int __pthread_setschedparam (pthread_t thread_id, int policy,
  404:                                     const struct sched_param *param);
  405: extern int __pthread_setcancelstate (int state, int *oldstate);
  406: extern int __pthread_mutex_init (pthread_mutex_t *__mutex,
  407:                                  __const pthread_mutexattr_t *__mutexattr);
  408: extern int __pthread_mutex_init_internal (pthread_mutex_t *__mutex,
  409:                                           __const pthread_mutexattr_t *__mutexattr)
  410:      attribute_hidden;
  411: extern int __pthread_mutex_destroy (pthread_mutex_t *__mutex);
  412: extern int __pthread_mutex_destroy_internal (pthread_mutex_t *__mutex)
  413:      attribute_hidden;
  414: extern int __pthread_mutex_trylock (pthread_mutex_t *_mutex);
  415: extern int __pthread_mutex_lock (pthread_mutex_t *__mutex);
  416: extern int __pthread_mutex_lock_internal (pthread_mutex_t *__mutex)
  417:      attribute_hidden;
  418: extern int __pthread_mutex_cond_lock (pthread_mutex_t *__mutex)
  419:      attribute_hidden internal_function;
  420: extern int __pthread_mutex_unlock (pthread_mutex_t *__mutex);
  421: extern int __pthread_mutex_unlock_internal (pthread_mutex_t *__mutex)
  422:      attribute_hidden;
  423: extern int __pthread_mutex_unlock_usercnt (pthread_mutex_t *__mutex,
  424:                                            int __decr)
  425:      attribute_hidden internal_function;
  426: extern int __pthread_mutexattr_init (pthread_mutexattr_t *attr);
  427: extern int __pthread_mutexattr_destroy (pthread_mutexattr_t *attr);
  428: extern int __pthread_mutexattr_settype (pthread_mutexattr_t *attr, int kind);
  429: extern int __pthread_attr_destroy (pthread_attr_t *attr);
  430: extern int __pthread_attr_getdetachstate (const pthread_attr_t *attr,
  431:                                           int *detachstate);
  432: extern int __pthread_attr_setdetachstate (pthread_attr_t *attr,
  433:                                           int detachstate);
  434: extern int __pthread_attr_getinheritsched (const pthread_attr_t *attr,
  435:                                            int *inherit);
  436: extern int __pthread_attr_setinheritsched (pthread_attr_t *attr, int inherit);
  437: extern int __pthread_attr_getschedparam (const pthread_attr_t *attr,
  438:                                          struct sched_param *param);
  439: extern int __pthread_attr_setschedparam (pthread_attr_t *attr,
  440:                                          const struct sched_param *param);
  441: extern int __pthread_attr_getschedpolicy (const pthread_attr_t *attr,
  442:                                           int *policy);
  443: extern int __pthread_attr_setschedpolicy (pthread_attr_t *attr, int policy);
  444: extern int __pthread_attr_getscope (const pthread_attr_t *attr, int *scope);
  445: extern int __pthread_attr_setscope (pthread_attr_t *attr, int scope);
  446: extern int __pthread_attr_getstackaddr (__const pthread_attr_t *__restrict
  447:                                         __attr, void **__restrict __stackaddr);
  448: extern int __pthread_attr_setstackaddr (pthread_attr_t *__attr,
  449:                                         void *__stackaddr);
  450: extern int __pthread_attr_getstacksize (__const pthread_attr_t *__restrict
  451:                                         __attr,
  452:                                         size_t *__restrict __stacksize);
  453: extern int __pthread_attr_setstacksize (pthread_attr_t *__attr,
  454:                                         size_t __stacksize);
  455: extern int __pthread_attr_getstack (__const pthread_attr_t *__restrict __attr,
  456:                                     void **__restrict __stackaddr,
  457:                                     size_t *__restrict __stacksize);
  458: extern int __pthread_attr_setstack (pthread_attr_t *__attr, void *__stackaddr,
  459:                                     size_t __stacksize);
  460: extern int __pthread_rwlock_init (pthread_rwlock_t *__restrict __rwlock,
  461:                                   __const pthread_rwlockattr_t *__restrict
  462:                                   __attr);
  463: extern int __pthread_rwlock_destroy (pthread_rwlock_t *__rwlock);
  464: extern int __pthread_rwlock_rdlock (pthread_rwlock_t *__rwlock);
  465: extern int __pthread_rwlock_rdlock_internal (pthread_rwlock_t *__rwlock);
  466: extern int __pthread_rwlock_tryrdlock (pthread_rwlock_t *__rwlock);
  467: extern int __pthread_rwlock_wrlock (pthread_rwlock_t *__rwlock);
  468: extern int __pthread_rwlock_wrlock_internal (pthread_rwlock_t *__rwlock);
  469: extern int __pthread_rwlock_trywrlock (pthread_rwlock_t *__rwlock);
  470: extern int __pthread_rwlock_unlock (pthread_rwlock_t *__rwlock);
  471: extern int __pthread_rwlock_unlock_internal (pthread_rwlock_t *__rwlock);
  472: extern int __pthread_cond_broadcast (pthread_cond_t *cond);
  473: extern int __pthread_cond_destroy (pthread_cond_t *cond);
  474: extern int __pthread_cond_init (pthread_cond_t *cond,
  475:                                 const pthread_condattr_t *cond_attr);
  476: extern int __pthread_cond_signal (pthread_cond_t *cond);
  477: extern int __pthread_cond_wait (pthread_cond_t *cond, pthread_mutex_t *mutex);
  478: extern int __pthread_cond_timedwait (pthread_cond_t *cond,
  479:                                      pthread_mutex_t *mutex,
  480:                                      const struct timespec *abstime);
  481: extern int __pthread_condattr_destroy (pthread_condattr_t *attr);
  482: extern int __pthread_condattr_init (pthread_condattr_t *attr);
  483: extern int __pthread_key_create (pthread_key_t *key, void (*destr) (void *));
  484: extern int __pthread_key_create_internal (pthread_key_t *key,
  485:                                           void (*destr) (void *));
  486: extern void *__pthread_getspecific (pthread_key_t key);
  487: extern void *__pthread_getspecific_internal (pthread_key_t key);
  488: extern int __pthread_setspecific (pthread_key_t key, const void *value);
  489: extern int __pthread_setspecific_internal (pthread_key_t key,
  490:                                            const void *value);
  491: extern int __pthread_once (pthread_once_t *once_control,
  492:                            void (*init_routine) (void));
  493: extern int __pthread_once_internal (pthread_once_t *once_control,
  494:                                     void (*init_routine) (void));
  495: extern int __pthread_atfork (void (*prepare) (void), void (*parent) (void),
  496:                              void (*child) (void));
  497: extern pthread_t __pthread_self (void);
  498: extern int __pthread_equal (pthread_t thread1, pthread_t thread2);
  499: extern int __pthread_kill (pthread_t threadid, int signo);
  500: extern void __pthread_exit (void *value);
  501: extern int __pthread_setcanceltype (int type, int *oldtype);
  502: extern int __pthread_enable_asynccancel (void) attribute_hidden;
  503: extern void __pthread_disable_asynccancel (int oldtype)
  504:      internal_function attribute_hidden;
  505: 
  506: extern int __pthread_cond_broadcast_2_0 (pthread_cond_2_0_t *cond);
  507: