/* Copyright (C) 2002-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#ifndef _PTHREADP_H

#define _PTHREADP_H	1

#include <pthread.h>

#include <setjmp.h>

#include <stdbool.h>

#include <sys/syscall.h>

#include "descr.h"

#include <tls.h>

#include <lowlevellock.h>

#include <stackinfo.h>

#include <internaltypes.h>

#include <pthread-functions.h>

#include <atomic.h>

#include <kernel-features.h>

#include <errno.h>

#include <internal-signals.h>

/* Atomic operations on TLS memory.  */

#ifndef THREAD_ATOMIC_CMPXCHG_VAL

# define THREAD_ATOMIC_CMPXCHG_VAL(descr, member, new, old) \

  atomic_compare_and_exchange_val_acq (&(descr)->member, new, old)

#endif

#ifndef THREAD_ATOMIC_BIT_SET

# define THREAD_ATOMIC_BIT_SET(descr, member, bit) \

  atomic_bit_set (&(descr)->member, bit)

#endif

/* Adaptive mutex definitions.  */

#ifndef MAX_ADAPTIVE_COUNT

# define MAX_ADAPTIVE_COUNT 100

#endif

/* Magic cookie representing robust mutex with dead owner.  */

#define PTHREAD_MUTEX_INCONSISTENT	INT_MAX

/* Magic cookie representing not recoverable robust mutex.  */

#define PTHREAD_MUTEX_NOTRECOVERABLE	(INT_MAX - 1)

/* Internal mutex type value.  */

enum

{

  PTHREAD_MUTEX_KIND_MASK_NP = 3,

  PTHREAD_MUTEX_ELISION_NP    = 256,

  PTHREAD_MUTEX_NO_ELISION_NP = 512,

  PTHREAD_MUTEX_ROBUST_NORMAL_NP = 16,

  PTHREAD_MUTEX_ROBUST_RECURSIVE_NP

  = PTHREAD_MUTEX_ROBUST_NORMAL_NP | PTHREAD_MUTEX_RECURSIVE_NP,

  PTHREAD_MUTEX_ROBUST_ERRORCHECK_NP

  = PTHREAD_MUTEX_ROBUST_NORMAL_NP | PTHREAD_MUTEX_ERRORCHECK_NP,

  PTHREAD_MUTEX_ROBUST_ADAPTIVE_NP

  = PTHREAD_MUTEX_ROBUST_NORMAL_NP | PTHREAD_MUTEX_ADAPTIVE_NP,

  PTHREAD_MUTEX_PRIO_INHERIT_NP = 32,

  PTHREAD_MUTEX_PI_NORMAL_NP

  = PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_NORMAL,

  PTHREAD_MUTEX_PI_RECURSIVE_NP

  = PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_RECURSIVE_NP,

  PTHREAD_MUTEX_PI_ERRORCHECK_NP

  = PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ERRORCHECK_NP,

  PTHREAD_MUTEX_PI_ADAPTIVE_NP

  = PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ADAPTIVE_NP,

  PTHREAD_MUTEX_PI_ROBUST_NORMAL_NP

  = PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ROBUST_NORMAL_NP,

  PTHREAD_MUTEX_PI_ROBUST_RECURSIVE_NP

  = PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ROBUST_RECURSIVE_NP,

  PTHREAD_MUTEX_PI_ROBUST_ERRORCHECK_NP

  = PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ROBUST_ERRORCHECK_NP,

  PTHREAD_MUTEX_PI_ROBUST_ADAPTIVE_NP

  = PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ROBUST_ADAPTIVE_NP,

  PTHREAD_MUTEX_PRIO_PROTECT_NP = 64,

  PTHREAD_MUTEX_PP_NORMAL_NP

  = PTHREAD_MUTEX_PRIO_PROTECT_NP | PTHREAD_MUTEX_NORMAL,

  PTHREAD_MUTEX_PP_RECURSIVE_NP

  = PTHREAD_MUTEX_PRIO_PROTECT_NP | PTHREAD_MUTEX_RECURSIVE_NP,

  PTHREAD_MUTEX_PP_ERRORCHECK_NP

  = PTHREAD_MUTEX_PRIO_PROTECT_NP | PTHREAD_MUTEX_ERRORCHECK_NP,

  PTHREAD_MUTEX_PP_ADAPTIVE_NP

  = PTHREAD_MUTEX_PRIO_PROTECT_NP | PTHREAD_MUTEX_ADAPTIVE_NP,

  PTHREAD_MUTEX_ELISION_FLAGS_NP

  = PTHREAD_MUTEX_ELISION_NP | PTHREAD_MUTEX_NO_ELISION_NP,

  PTHREAD_MUTEX_TIMED_ELISION_NP =

	  PTHREAD_MUTEX_TIMED_NP | PTHREAD_MUTEX_ELISION_NP,

  PTHREAD_MUTEX_TIMED_NO_ELISION_NP =

	  PTHREAD_MUTEX_TIMED_NP | PTHREAD_MUTEX_NO_ELISION_NP,

};

#define PTHREAD_MUTEX_PSHARED_BIT 128

/* See concurrency notes regarding __kind in struct __pthread_mutex_s

   in sysdeps/nptl/bits/thread-shared-types.h.  */

#define PTHREAD_MUTEX_TYPE(m) \

  (atomic_load_relaxed (&((m)->__data.__kind)) & 127)

/* Don't include NO_ELISION, as that type is always the same

   as the underlying lock type.  */

#define PTHREAD_MUTEX_TYPE_ELISION(m) \

  (atomic_load_relaxed (&((m)->__data.__kind))	\

   & (127 | PTHREAD_MUTEX_ELISION_NP))

#if LLL_PRIVATE == 0 && LLL_SHARED == 128

# define PTHREAD_MUTEX_PSHARED(m) \

  (atomic_load_relaxed (&((m)->__data.__kind)) & 128)

#else

# define PTHREAD_MUTEX_PSHARED(m) \

  ((atomic_load_relaxed (&((m)->__data.__kind)) & 128)	\

   ? LLL_SHARED : LLL_PRIVATE)

#endif

/* The kernel when waking robust mutexes on exit never uses

   FUTEX_PRIVATE_FLAG FUTEX_WAKE.  */

#define PTHREAD_ROBUST_MUTEX_PSHARED(m) LLL_SHARED

/* Ceiling in __data.__lock.  __data.__lock is signed, so don't

   use the MSB bit in there, but in the mask also include that bit,

   so that the compiler can optimize & PTHREAD_MUTEX_PRIO_CEILING_MASK

   masking if the value is then shifted down by

   PTHREAD_MUTEX_PRIO_CEILING_SHIFT.  */

#define PTHREAD_MUTEX_PRIO_CEILING_SHIFT	19

#define PTHREAD_MUTEX_PRIO_CEILING_MASK		0xfff80000

/* Flags in mutex attr.  */

#define PTHREAD_MUTEXATTR_PROTOCOL_SHIFT	28

#define PTHREAD_MUTEXATTR_PROTOCOL_MASK		0x30000000

#define PTHREAD_MUTEXATTR_PRIO_CEILING_SHIFT	12

#define PTHREAD_MUTEXATTR_PRIO_CEILING_MASK	0x00fff000

#define PTHREAD_MUTEXATTR_FLAG_ROBUST		0x40000000

#define PTHREAD_MUTEXATTR_FLAG_PSHARED		0x80000000

#define PTHREAD_MUTEXATTR_FLAG_BITS \

  (PTHREAD_MUTEXATTR_FLAG_ROBUST | PTHREAD_MUTEXATTR_FLAG_PSHARED \

   | PTHREAD_MUTEXATTR_PROTOCOL_MASK | PTHREAD_MUTEXATTR_PRIO_CEILING_MASK)

/* For the following, see pthread_rwlock_common.c.  */

#define PTHREAD_RWLOCK_WRPHASE		1

#define PTHREAD_RWLOCK_WRLOCKED		2

#define PTHREAD_RWLOCK_RWAITING		4

#define PTHREAD_RWLOCK_READER_SHIFT	3

#define PTHREAD_RWLOCK_READER_OVERFLOW	((unsigned int) 1 \

					 << (sizeof (unsigned int) * 8 - 1))

#define PTHREAD_RWLOCK_WRHANDOVER	((unsigned int) 1 \

					 << (sizeof (unsigned int) * 8 - 1))

#define PTHREAD_RWLOCK_FUTEX_USED	2

/* Bits used in robust mutex implementation.  */

#define FUTEX_WAITERS		0x80000000

#define FUTEX_OWNER_DIED	0x40000000

#define FUTEX_TID_MASK		0x3fffffff

/* pthread_once definitions.  See __pthread_once for how these are used.  */

#define __PTHREAD_ONCE_INPROGRESS	1

#define __PTHREAD_ONCE_DONE		2

#define __PTHREAD_ONCE_FORK_GEN_INCR	4

/* Attribute to indicate thread creation was issued from C11 thrd_create.  */

#define ATTR_C11_THREAD ((void*)(uintptr_t)-1)

/* Condition variable definitions.  See __pthread_cond_wait_common.

   Need to be defined here so there is one place from which

   nptl_lock_constants can grab them.  */

#define __PTHREAD_COND_CLOCK_MONOTONIC_MASK 2

#define __PTHREAD_COND_SHARED_MASK 1

/* Internal variables.  */

/* Default pthread attributes.  */

extern struct pthread_attr __default_pthread_attr attribute_hidden;

extern int __default_pthread_attr_lock attribute_hidden;

/* Size and alignment of static TLS block.  */

extern size_t __static_tls_size attribute_hidden;

extern size_t __static_tls_align_m1 attribute_hidden;

/* Flag whether the machine is SMP or not.  */

extern int __is_smp attribute_hidden;

/* Thread descriptor handling.  */

extern list_t __stack_user;

hidden_proto (__stack_user)

/* Attribute handling.  */

extern struct pthread_attr *__attr_list attribute_hidden;

extern int __attr_list_lock attribute_hidden;

/* Concurrency handling.  */

extern int __concurrency_level attribute_hidden;

/* Thread-local data key handling.  */

extern struct pthread_key_struct __pthread_keys[PTHREAD_KEYS_MAX];

hidden_proto (__pthread_keys)

/* Number of threads running.  */

extern unsigned int __nptl_nthreads attribute_hidden;

#ifndef __ASSUME_SET_ROBUST_LIST

/* Negative if we do not have the system call and we can use it.  */

extern int __set_robust_list_avail attribute_hidden;

#endif

/* Thread Priority Protection.  */

extern int __sched_fifo_min_prio attribute_hidden;

extern int __sched_fifo_max_prio attribute_hidden;

extern void __init_sched_fifo_prio (void) attribute_hidden;

extern int __pthread_tpp_change_priority (int prev_prio, int new_prio)

     attribute_hidden;

extern int __pthread_current_priority (void) attribute_hidden;

/* The library can run in debugging mode where it performs a lot more

   tests.  */

extern int __pthread_debug attribute_hidden;

/** For now disable debugging support.  */

#if 0

# define DEBUGGING_P __builtin_expect (__pthread_debug, 0)

# define INVALID_TD_P(pd) (DEBUGGING_P && __find_in_stack_list (pd) == NULL)

# define INVALID_NOT_TERMINATED_TD_P(pd) INVALID_TD_P (pd)

#else

# define DEBUGGING_P 0

/* Simplified test.  This will not catch all invalid descriptors but

   is better than nothing.  And if the test triggers the thread

   descriptor is guaranteed to be invalid.  */

# define INVALID_TD_P(pd) __builtin_expect ((pd)->tid <= 0, 0)

# define INVALID_NOT_TERMINATED_TD_P(pd) __builtin_expect ((pd)->tid < 0, 0)

#endif

/* Cancellation test.  */

#define CANCELLATION_P(self) \

  do {									      \

    int cancelhandling = THREAD_GETMEM (self, cancelhandling);		      \

    if (CANCEL_ENABLED_AND_CANCELED (cancelhandling))			      \

      {									      \

	THREAD_SETMEM (self, result, PTHREAD_CANCELED);			      \

	__do_cancel ();							      \

      }									      \

  } while (0)

extern void __pthread_unwind (__pthread_unwind_buf_t *__buf)

     __cleanup_fct_attribute __attribute ((__noreturn__))

#if !defined SHARED && !IS_IN (libpthread)

     weak_function

#endif

     ;

extern void __pthread_unwind_next (__pthread_unwind_buf_t *__buf)

     __cleanup_fct_attribute __attribute ((__noreturn__))

#ifndef SHARED

     weak_function

#endif

     ;

extern void __pthread_register_cancel (__pthread_unwind_buf_t *__buf)

     __cleanup_fct_attribute;

extern void __pthread_unregister_cancel (__pthread_unwind_buf_t *__buf)

     __cleanup_fct_attribute;

#if IS_IN (libpthread)

hidden_proto (__pthread_unwind)

hidden_proto (__pthread_unwind_next)

hidden_proto (__pthread_register_cancel)

hidden_proto (__pthread_unregister_cancel)

# ifdef SHARED

extern void attribute_hidden pthread_cancel_init (void);

# endif

extern void __nptl_unwind_freeres (void) attribute_hidden;

#endif

/* Called when a thread reacts on a cancellation request.  */

static inline void

__attribute ((noreturn, always_inline))

__do_cancel (void)

{

  struct pthread *self = THREAD_SELF;

  /* Make sure we get no more cancellations.  */

  THREAD_ATOMIC_BIT_SET (self, cancelhandling, EXITING_BIT);

  __pthread_unwind ((__pthread_unwind_buf_t *)

		    THREAD_GETMEM (self, cleanup_jmp_buf));

}

/* Set cancellation mode to asynchronous.  */

#define CANCEL_ASYNC() \

  __pthread_enable_asynccancel ()

/* Reset to previous cancellation mode.  */

#define CANCEL_RESET(oldtype) \

  __pthread_disable_asynccancel (oldtype)

#if IS_IN (libc)

/* Same as CANCEL_ASYNC, but for use in libc.so.  */

# define LIBC_CANCEL_ASYNC() \

  __libc_enable_asynccancel ()

/* Same as CANCEL_RESET, but for use in libc.so.  */

# define LIBC_CANCEL_RESET(oldtype) \

  __libc_disable_asynccancel (oldtype)

# define LIBC_CANCEL_HANDLED() \

  __asm (".globl " __SYMBOL_PREFIX "__libc_enable_asynccancel"); \

  __asm (".globl " __SYMBOL_PREFIX "__libc_disable_asynccancel")

#elif IS_IN (libpthread)

# define LIBC_CANCEL_ASYNC() CANCEL_ASYNC ()

# define LIBC_CANCEL_RESET(val) CANCEL_RESET (val)

# define LIBC_CANCEL_HANDLED() \

  __asm (".globl " __SYMBOL_PREFIX "__pthread_enable_asynccancel"); \

  __asm (".globl " __SYMBOL_PREFIX "__pthread_disable_asynccancel")

#elif IS_IN (librt)

# define LIBC_CANCEL_ASYNC() \

  __librt_enable_asynccancel ()

# define LIBC_CANCEL_RESET(val) \

  __librt_disable_asynccancel (val)

# define LIBC_CANCEL_HANDLED() \

  __asm (".globl " __SYMBOL_PREFIX "__librt_enable_asynccancel"); \

  __asm (".globl " __SYMBOL_PREFIX "__librt_disable_asynccancel")

#else

# define LIBC_CANCEL_ASYNC()	0 /* Just a dummy value.  */

# define LIBC_CANCEL_RESET(val)	((void)(val)) /* Nothing, but evaluate it.  */

# define LIBC_CANCEL_HANDLED()	/* Nothing.  */

#endif

/* Internal prototypes.  */

/* Thread list handling.  */

extern struct pthread *__find_in_stack_list (struct pthread *pd)

     attribute_hidden;

/* Deallocate a thread's stack after optionally making sure the thread

   descriptor is still valid.  */

extern void __free_tcb (struct pthread *pd) attribute_hidden;

/* Free allocated stack.  */

extern void __deallocate_stack (struct pthread *pd) attribute_hidden;

/* Mark all the stacks except for the current one as available.  This

   function also re-initializes the lock for the stack cache.  */

extern void __reclaim_stacks (void) attribute_hidden;

/* Make all threads's stacks executable.  */

extern int __make_stacks_executable (void **stack_endp) attribute_hidden;

/* longjmp handling.  */

extern void __pthread_cleanup_upto (__jmp_buf target, char *targetframe);

#if IS_IN (libpthread)

hidden_proto (__pthread_cleanup_upto)

#endif

/* Functions with versioned interfaces.  */

extern int __pthread_create_2_1 (pthread_t *newthread,

				 const pthread_attr_t *attr,

				 void *(*start_routine) (void *), void *arg);

extern int __pthread_create_2_0 (pthread_t *newthread,

				 const pthread_attr_t *attr,

				 void *(*start_routine) (void *), void *arg);

extern int __pthread_attr_init_2_1 (pthread_attr_t *attr);

extern int __pthread_attr_init_2_0 (pthread_attr_t *attr);

/* Event handlers for libthread_db interface.  */

extern void __nptl_create_event (void);

extern void __nptl_death_event (void);

hidden_proto (__nptl_create_event)

hidden_proto (__nptl_death_event)

/* Register the generation counter in the libpthread with the libc.  */

#ifdef TLS_MULTIPLE_THREADS_IN_TCB

extern void __libc_pthread_init (unsigned long int *ptr,

				 void (*reclaim) (void),

				 const struct pthread_functions *functions);

#else

extern int *__libc_pthread_init (unsigned long int *ptr,

				 void (*reclaim) (void),

				 const struct pthread_functions *functions);

/* Variable set to a nonzero value either if more than one thread runs or ran,

   or if a single-threaded process is trying to cancel itself.  See

   nptl/descr.h for more context on the single-threaded process case.  */

extern int __pthread_multiple_threads attribute_hidden;

/* Pointer to the corresponding variable in libc.  */

extern int *__libc_multiple_threads_ptr attribute_hidden;

#endif

extern void __pthread_init_static_tls (struct link_map *) attribute_hidden;

extern size_t __pthread_get_minstack (const pthread_attr_t *attr);

/* Namespace save aliases.  */

extern int __pthread_getschedparam (pthread_t thread_id, int *policy,

				    struct sched_param *param);

extern int __pthread_setschedparam (pthread_t thread_id, int policy,

				    const struct sched_param *param);

extern int __pthread_setcancelstate (int state, int *oldstate);

extern int __pthread_mutex_init (pthread_mutex_t *__mutex,

				 const pthread_mutexattr_t *__mutexattr);

extern int __pthread_mutex_destroy (pthread_mutex_t *__mutex);

extern int __pthread_mutex_trylock (pthread_mutex_t *_mutex);

extern int __pthread_mutex_lock (pthread_mutex_t *__mutex);

extern int __pthread_mutex_timedlock (pthread_mutex_t *__mutex,

     const struct timespec *__abstime);

extern int __pthread_mutex_cond_lock (pthread_mutex_t *__mutex)

     attribute_hidden;

extern void __pthread_mutex_cond_lock_adjust (pthread_mutex_t *__mutex)

     attribute_hidden;

extern int __pthread_mutex_unlock (pthread_mutex_t *__mutex);

extern int __pthread_mutex_unlock_usercnt (pthread_mutex_t *__mutex,

					   int __decr) attribute_hidden;

extern int __pthread_mutexattr_init (pthread_mutexattr_t *attr);

extern int __pthread_mutexattr_destroy (pthread_mutexattr_t *attr);

extern int __pthread_mutexattr_settype (pthread_mutexattr_t *attr, int kind);

extern int __pthread_attr_destroy (pthread_attr_t *attr);

extern int __pthread_attr_getdetachstate (const pthread_attr_t *attr,

					  int *detachstate);

extern int __pthread_attr_setdetachstate (pthread_attr_t *attr,

					  int detachstate);

extern int __pthread_attr_getinheritsched (const pthread_attr_t *attr,

					   int *inherit);

extern int __pthread_attr_setinheritsched (pthread_attr_t *attr, int inherit);

extern int __pthread_attr_getschedparam (const pthread_attr_t *attr,

					 struct sched_param *param);

extern int __pthread_attr_setschedparam (pthread_attr_t *attr,

					 const struct sched_param *param);

extern int __pthread_attr_getschedpolicy (const pthread_attr_t *attr,

					  int *policy);

extern int __pthread_attr_setschedpolicy (pthread_attr_t *attr, int policy);

extern int __pthread_attr_getscope (const pthread_attr_t *attr, int *scope);

extern int __pthread_attr_setscope (pthread_attr_t *attr, int scope);

extern int __pthread_attr_getstackaddr (const pthread_attr_t *__restrict

					__attr, void **__restrict __stackaddr);

extern int __pthread_attr_setstackaddr (pthread_attr_t *__attr,

					void *__stackaddr);

extern int __pthread_attr_getstacksize (const pthread_attr_t *__restrict

					__attr,

					size_t *__restrict __stacksize);

extern int __pthread_attr_setstacksize (pthread_attr_t *__attr,

					size_t __stacksize);

extern int __pthread_attr_getstack (const pthread_attr_t *__restrict __attr,

				    void **__restrict __stackaddr,

				    size_t *__restrict __stacksize);

extern int __pthread_attr_setstack (pthread_attr_t *__attr, void *__stackaddr,

				    size_t __stacksize);

extern int __pthread_rwlock_init (pthread_rwlock_t *__restrict __rwlock,

				  const pthread_rwlockattr_t *__restrict

				  __attr);

extern int __pthread_rwlock_destroy (pthread_rwlock_t *__rwlock);

extern int __pthread_rwlock_rdlock (pthread_rwlock_t *__rwlock);

extern int __pthread_rwlock_tryrdlock (pthread_rwlock_t *__rwlock);

extern int __pthread_rwlock_wrlock (pthread_rwlock_t *__rwlock);

extern int __pthread_rwlock_trywrlock (pthread_rwlock_t *__rwlock);

extern int __pthread_rwlock_unlock (pthread_rwlock_t *__rwlock);

extern int __pthread_cond_broadcast (pthread_cond_t *cond);

extern int __pthread_cond_destroy (pthread_cond_t *cond);

extern int __pthread_cond_init (pthread_cond_t *cond,

				const pthread_condattr_t *cond_attr);

extern int __pthread_cond_signal (pthread_cond_t *cond);

extern int __pthread_cond_wait (pthread_cond_t *cond, pthread_mutex_t *mutex);

extern int __pthread_cond_timedwait (pthread_cond_t *cond,

				     pthread_mutex_t *mutex,

				     const struct timespec *abstime);

extern int __pthread_condattr_destroy (pthread_condattr_t *attr);

extern int __pthread_condattr_init (pthread_condattr_t *attr);

extern int __pthread_key_create (pthread_key_t *key, void (*destr) (void *));

extern int __pthread_key_delete (pthread_key_t key);

extern void *__pthread_getspecific (pthread_key_t key);

extern int __pthread_setspecific (pthread_key_t key, const void *value);

extern int __pthread_once (pthread_once_t *once_control,

			   void (*init_routine) (void));

extern int __pthread_atfork (void (*prepare) (void), void (*parent) (void),

			     void (*child) (void));

extern pthread_t __pthread_self (void);

extern int __pthread_equal (pthread_t thread1, pthread_t thread2);

extern int __pthread_detach (pthread_t th);

extern int __pthread_cancel (pthread_t th);

extern int __pthread_kill (pthread_t threadid, int signo);

extern void __pthread_exit (void *value) __attribute__ ((__noreturn__));

extern int __pthread_join (pthread_t threadid, void **thread_return);

extern int __pthread_setcanceltype (int type, int *oldtype);

extern int __pthread_enable_asynccancel (void) attribute_hidden;

extern void __pthread_disable_asynccancel (int oldtype) attribute_hidden;

extern void __pthread_testcancel (void);

extern int __pthread_timedjoin_ex (pthread_t, void **, const struct timespec *,

				   bool);

#if IS_IN (libpthread)

hidden_proto (__pthread_mutex_init)

hidden_proto (__pthread_mutex_destroy)

hidden_proto (__pthread_mutex_lock)

hidden_proto (__pthread_mutex_trylock)

hidden_proto (__pthread_mutex_unlock)

hidden_proto (__pthread_rwlock_rdlock)

hidden_proto (__pthread_rwlock_wrlock)

hidden_proto (__pthread_rwlock_unlock)

hidden_proto (__pthread_key_create)

hidden_proto (__pthread_getspecific)

hidden_proto (__pthread_setspecific)

hidden_proto (__pthread_once)

hidden_proto (__pthread_setcancelstate)

hidden_proto (__pthread_testcancel)

hidden_proto (__pthread_mutexattr_init)

hidden_proto (__pthread_mutexattr_settype)

hidden_proto (__pthread_timedjoin_ex)

#endif

extern int __pthread_cond_broadcast_2_0 (pthread_cond_2_0_t *cond);

extern int __pthread_cond_destroy_2_0 (pthread_cond_2_0_t *cond);

extern int __pthread_cond_init_2_0 (pthread_cond_2_0_t *cond,

				    const pthread_condattr_t *cond_attr);

extern int __pthread_cond_signal_2_0 (pthread_cond_2_0_t *cond);

extern int __pthread_cond_timedwait_2_0 (pthread_cond_2_0_t *cond,

					 pthread_mutex_t *mutex,

					 const struct timespec *abstime);

extern int __pthread_cond_wait_2_0 (pthread_cond_2_0_t *cond,

				    pthread_mutex_t *mutex);

extern int __pthread_getaffinity_np (pthread_t th, size_t cpusetsize,

				     cpu_set_t *cpuset);

/* The two functions are in libc.so and not exported.  */

extern int __libc_enable_asynccancel (void) attribute_hidden;

extern void __libc_disable_asynccancel (int oldtype) attribute_hidden;

/* The two functions are in librt.so and not exported.  */

extern int __librt_enable_asynccancel (void) attribute_hidden;

extern void __librt_disable_asynccancel (int oldtype) attribute_hidden;

#if IS_IN (libpthread)

/* Special versions which use non-exported functions.  */

extern void __pthread_cleanup_push (struct _pthread_cleanup_buffer *buffer,

				    void (*routine) (void *), void *arg)

     attribute_hidden;

/* Replace cleanup macros defined in <pthread.h> with internal

   versions that don't depend on unwind info and better support

   cancellation.  */

# undef pthread_cleanup_push

# define pthread_cleanup_push(routine,arg)              \

  { struct _pthread_cleanup_buffer _buffer;             \

  __pthread_cleanup_push (&_buffer, (routine), (arg));

extern void __pthread_cleanup_pop (struct _pthread_cleanup_buffer *buffer,

				   int execute) attribute_hidden;

# undef pthread_cleanup_pop

# define pthread_cleanup_pop(execute)                   \

  __pthread_cleanup_pop (&_buffer, (execute)); }

#endif

extern void __pthread_cleanup_push_defer (struct _pthread_cleanup_buffer *buffer,

					  void (*routine) (void *), void *arg);

extern void __pthread_cleanup_pop_restore (struct _pthread_cleanup_buffer *buffer,

					   int execute);

/* Old cleanup interfaces, still used in libc.so.  */

extern void _pthread_cleanup_push (struct _pthread_cleanup_buffer *buffer,

				   void (*routine) (void *), void *arg);

extern void _pthread_cleanup_pop (struct _pthread_cleanup_buffer *buffer,

				  int execute);

extern void _pthread_cleanup_push_defer (struct _pthread_cleanup_buffer *buffer,

					 void (*routine) (void *), void *arg);

extern void _pthread_cleanup_pop_restore (struct _pthread_cleanup_buffer *buffer,

					  int execute);

extern void __nptl_deallocate_tsd (void) attribute_hidden;

extern void __nptl_setxid_error (struct xid_command *cmdp, int error)

  attribute_hidden;

extern int __nptl_setxid (struct xid_command *cmdp) attribute_hidden;

#ifndef SHARED

extern void __nptl_set_robust (struct pthread *self);

#endif

extern void __nptl_stacks_freeres (void) attribute_hidden;

extern void __shm_directory_freeres (void) attribute_hidden;

extern void __wait_lookup_done (void) attribute_hidden;

#ifdef SHARED

# define PTHREAD_STATIC_FN_REQUIRE(name)

#else

# define PTHREAD_STATIC_FN_REQUIRE(name) __asm (".globl " #name);

#endif

/* Returns 0 if POL is a valid scheduling policy.  */

static inline int

check_sched_policy_attr (int pol)

{

  if (pol == SCHED_OTHER || pol == SCHED_FIFO || pol == SCHED_RR)

    return 0;

  return EINVAL;

}

/* Returns 0 if PR is within the accepted range of priority values for

   the scheduling policy POL or EINVAL otherwise.  */

static inline int

check_sched_priority_attr (int pr, int pol)

{

  int min = __sched_get_priority_min (pol);

  int max = __sched_get_priority_max (pol);

  if (min >= 0 && max >= 0 && pr >= min && pr <= max)

    return 0;

  return EINVAL;

}

/* Returns 0 if ST is a valid stack size for a thread stack and EINVAL

   otherwise.  */

static inline int

check_stacksize_attr (size_t st)

{

  if (st >= PTHREAD_STACK_MIN)

    return 0;

  return EINVAL;

}

#define ASSERT_TYPE_SIZE(type, size) 					\

  _Static_assert (sizeof (type) == size,				\

		  "sizeof (" #type ") != " #size)

#define ASSERT_PTHREAD_INTERNAL_SIZE(type, internal) 			\

  _Static_assert (sizeof ((type) { { 0 } }).__size >= sizeof (internal),\

		  "sizeof (" #type ".__size) < sizeof (" #internal ")")

#define ASSERT_PTHREAD_STRING(x) __STRING (x)

#define ASSERT_PTHREAD_INTERNAL_OFFSET(type, member, offset)		\

  _Static_assert (offsetof (type, member) == offset,			\

		  "offset of " #member " field of " #type " != "	\

		  ASSERT_PTHREAD_STRING (offset))

#endif	/* pthreadP.h */