libc/include/pthread.h - android_bionic - Gitiles

 /*
  * Copyright (C) 2008 The Android Open Source Project
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *  * Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  *  * Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in
  *    the documentation and/or other materials provided with the
  *    distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
  * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  */

 #ifndef _PTHREAD_H_
 #define _PTHREAD_H_

 #include <limits.h>
 #include <bits/pthread_types.h>
 #include <sched.h>
 #include <sys/cdefs.h>
 #include <sys/types.h>
 #include <time.h>

 __BEGIN_DECLS

 enum {
   PTHREAD_MUTEX_NORMAL = 0,
   PTHREAD_MUTEX_RECURSIVE = 1,
   PTHREAD_MUTEX_ERRORCHECK = 2,

   PTHREAD_MUTEX_ERRORCHECK_NP = PTHREAD_MUTEX_ERRORCHECK,
   PTHREAD_MUTEX_RECURSIVE_NP  = PTHREAD_MUTEX_RECURSIVE,

   PTHREAD_MUTEX_DEFAULT = PTHREAD_MUTEX_NORMAL
 };

 #define PTHREAD_MUTEX_INITIALIZER { { ((PTHREAD_MUTEX_NORMAL & 3) << 14) } }
 #define PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP { { ((PTHREAD_MUTEX_RECURSIVE & 3) << 14) } }
 #define PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP { { ((PTHREAD_MUTEX_ERRORCHECK & 3) << 14) } }

 #define PTHREAD_COND_INITIALIZER  { { 0 } }
 #if __ANDROID_API__ >= __ANDROID_API_L__
 #define PTHREAD_COND_INITIALIZER_MONOTONIC_NP  { { 1 << 1 } }
 #endif

 #define PTHREAD_RWLOCK_INITIALIZER  { { 0 } }

 enum {
   PTHREAD_RWLOCK_PREFER_READER_NP = 0,
   PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP = 1,
 };

 #define PTHREAD_ONCE_INIT 0

 #if __ANDROID_API__ >= __ANDROID_API_N__
 #define PTHREAD_BARRIER_SERIAL_THREAD -1
 #endif

 #if defined(__LP64__)
 #define PTHREAD_STACK_MIN (4 * PAGE_SIZE)
 #else
 #define PTHREAD_STACK_MIN (2 * PAGE_SIZE)
 #endif

 #define PTHREAD_CREATE_DETACHED 1
 #define PTHREAD_CREATE_JOINABLE 0

 #define PTHREAD_EXPLICIT_SCHED 0
 #define PTHREAD_INHERIT_SCHED 1

 #define PTHREAD_PRIO_NONE 0
 #define PTHREAD_PRIO_INHERIT 1

 #define PTHREAD_PROCESS_PRIVATE 0
 #define PTHREAD_PROCESS_SHARED 1

 #define PTHREAD_SCOPE_SYSTEM 0
 #define PTHREAD_SCOPE_PROCESS 1

 int pthread_atfork(void (*__prepare)(void), void (*__parent)(void), void (*__child)(void));

 int pthread_attr_destroy(pthread_attr_t* __attr);
 int pthread_attr_getdetachstate(const pthread_attr_t* __attr, int* __state);
 int pthread_attr_getguardsize(const pthread_attr_t* __attr, size_t* __size);
 int pthread_attr_getinheritsched(const pthread_attr_t* __attr, int* __flag) __INTRODUCED_IN(28);
 int pthread_attr_getschedparam(const pthread_attr_t* __attr, struct sched_param* __param);
 int pthread_attr_getschedpolicy(const pthread_attr_t* __attr, int* __policy);
 int pthread_attr_getscope(const pthread_attr_t* __attr, int* __scope);
 int pthread_attr_getstack(const pthread_attr_t* __attr, void** __addr, size_t* __size);
 int pthread_attr_getstacksize(const pthread_attr_t* __attr, size_t* __size);
 int pthread_attr_init(pthread_attr_t* __attr);
 int pthread_attr_setdetachstate(pthread_attr_t* __attr, int __state);
 int pthread_attr_setguardsize(pthread_attr_t* __attr, size_t __size);
 int pthread_attr_setinheritsched(pthread_attr_t* __attr, int __flag) __INTRODUCED_IN(28);
 int pthread_attr_setschedparam(pthread_attr_t* __attr, const struct sched_param* __param);
 int pthread_attr_setschedpolicy(pthread_attr_t* __attr, int __policy);
 int pthread_attr_setscope(pthread_attr_t* __attr, int __scope);
 int pthread_attr_setstack(pthread_attr_t* __attr, void* __addr, size_t __size);
 int pthread_attr_setstacksize(pthread_attr_t* __addr, size_t __size);

 int pthread_condattr_destroy(pthread_condattr_t* __attr);
 int pthread_condattr_getclock(const pthread_condattr_t* __attr, clockid_t* __clock) __INTRODUCED_IN(21);
 int pthread_condattr_getpshared(const pthread_condattr_t* __attr, int* __shared);
 int pthread_condattr_init(pthread_condattr_t* __attr);
 int pthread_condattr_setclock(pthread_condattr_t* __attr, clockid_t __clock) __INTRODUCED_IN(21);
 int pthread_condattr_setpshared(pthread_condattr_t* __attr, int __shared);

 int pthread_cond_broadcast(pthread_cond_t* __cond);
 int pthread_cond_clockwait(pthread_cond_t* __cond, pthread_mutex_t* __mutex, clockid_t __clock,
                            const struct timespec* __timeout) __INTRODUCED_IN(30);
 int pthread_cond_destroy(pthread_cond_t* __cond);
 int pthread_cond_init(pthread_cond_t* __cond, const pthread_condattr_t* __attr);
 int pthread_cond_signal(pthread_cond_t* __cond);
 int pthread_cond_timedwait(pthread_cond_t* __cond, pthread_mutex_t* __mutex, const struct timespec* __timeout);
 /*
  * Condition variables use CLOCK_REALTIME by default for their timeouts, however that is
  * typically inappropriate, since that clock can change dramatically, causing the timeout to
  * either expire earlier or much later than intended.
  * Condition variables have an initialization option to use CLOCK_MONOTONIC, and in addition,
  * Android provides pthread_cond_timedwait_monotonic_np to use CLOCK_MONOTONIC on a condition
  * variable for this single wait no matter how it was initialized.
  * Note that pthread_cond_clockwait() allows specifying an arbitrary clock and has superseded this
  * function.
  */
 int pthread_cond_timedwait_monotonic_np(pthread_cond_t* __cond, pthread_mutex_t* __mutex,
                                         const struct timespec* __timeout) __INTRODUCED_IN_64(28);
 int pthread_cond_wait(pthread_cond_t* __cond, pthread_mutex_t* __mutex);

 #if defined(__clang__)
 /*
  * Disable -Wbuiltin-requires-header because clang confuses this declaration with the one defined in
  * "llvm/tools/clang/include/clang/Basic/Builtins.def", which did not define any formal arguments.
  * It seems to be an upstream bug and the fix (https://reviews.llvm.org/D58531) is still under
  * review. Thus, let's disable the warning for this function declaration.
  */
 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Wbuiltin-requires-header"
 #endif
 int pthread_create(pthread_t* __pthread_ptr, pthread_attr_t const* __attr, void* (*__start_routine)(void*), void*);
 #if defined(__clang__)
 #pragma clang diagnostic pop
 #endif

 int pthread_detach(pthread_t __pthread);
 void pthread_exit(void* __return_value) __noreturn;

 int pthread_equal(pthread_t __lhs, pthread_t __rhs);

 int pthread_getattr_np(pthread_t __pthread, pthread_attr_t* __attr);

 int pthread_getcpuclockid(pthread_t __pthread, clockid_t* __clock);

 int pthread_getschedparam(pthread_t __pthread, int* __policy, struct sched_param* __param);

 void* pthread_getspecific(pthread_key_t __key);

 pid_t pthread_gettid_np(pthread_t __pthread) __INTRODUCED_IN(21);

 int pthread_join(pthread_t __pthread, void** __return_value_ptr);

 int pthread_key_create(pthread_key_t* __key_ptr, void (*__key_destructor)(void*));
 int pthread_key_delete(pthread_key_t __key);

 int pthread_mutexattr_destroy(pthread_mutexattr_t* __attr);
 int pthread_mutexattr_getpshared(const pthread_mutexattr_t* __attr, int* __shared);
 int pthread_mutexattr_gettype(const pthread_mutexattr_t* __attr, int* __type);
 int pthread_mutexattr_getprotocol(const pthread_mutexattr_t* __attr, int* __protocol) __INTRODUCED_IN(28);
 int pthread_mutexattr_init(pthread_mutexattr_t* __attr);
 int pthread_mutexattr_setpshared(pthread_mutexattr_t* __attr, int __shared);
 int pthread_mutexattr_settype(pthread_mutexattr_t* __attr, int __type);
 int pthread_mutexattr_setprotocol(pthread_mutexattr_t* __attr, int __protocol) __INTRODUCED_IN(28);

 int pthread_mutex_clocklock(pthread_mutex_t* __mutex, clockid_t __clock,
                             const struct timespec* __abstime) __INTRODUCED_IN(30);
 int pthread_mutex_destroy(pthread_mutex_t* __mutex);
 int pthread_mutex_init(pthread_mutex_t* __mutex, const pthread_mutexattr_t* __attr);
 int pthread_mutex_lock(pthread_mutex_t* __mutex);
 int pthread_mutex_timedlock(pthread_mutex_t* __mutex, const struct timespec* __timeout)
   __INTRODUCED_IN(21);

 /*
  * POSIX historically only supported using pthread_mutex_timedlock() with CLOCK_REALTIME, however
  * that is typically inappropriate, since that clock can change dramatically, causing the timeout to
  * either expire earlier or much later than intended.
  * This function is added to use a timespec based on CLOCK_MONOTONIC that does not suffer
  * from this issue.
  * Note that pthread_mutex_clocklock() allows specifying an arbitrary clock and has superseded this
  * function.
  */
 int pthread_mutex_timedlock_monotonic_np(pthread_mutex_t* __mutex, const struct timespec* __timeout)
     __INTRODUCED_IN(28);
 int pthread_mutex_trylock(pthread_mutex_t* __mutex);
 int pthread_mutex_unlock(pthread_mutex_t* __mutex);

 #if __ANDROID_API__ < 21
 /*
  * Cruft for supporting old API levels. Pre-L we didn't have the proper POSIX
  * APIs for things, but instead had some locally grown, artisan equivalents.
  * Keep exposing the old prototypes on old API levels so we don't regress
  * functionality.
  *
  * See the following bugs:
  *  * https://github.com/android-ndk/ndk/issues/420
  *  * https://github.com/android-ndk/ndk/issues/423
  *  * https://stackoverflow.com/q/44580542/632035
  */
 int pthread_mutex_lock_timeout_np(pthread_mutex_t* __mutex, unsigned __timeout_ms);
 int pthread_cond_timeout_np(pthread_cond_t* __cond, pthread_mutex_t* __mutex, unsigned __timeout_ms);
 int pthread_cond_timedwait_relative_np(pthread_cond_t* __cond, pthread_mutex_t* __mutex, const struct timespec* __relative_timeout);
 #endif

 int pthread_once(pthread_once_t* __once, void (*__init_routine)(void));

 int pthread_rwlockattr_init(pthread_rwlockattr_t* __attr);
 int pthread_rwlockattr_destroy(pthread_rwlockattr_t* __attr);
 int pthread_rwlockattr_getpshared(const pthread_rwlockattr_t* __attr, int* __shared);
 int pthread_rwlockattr_setpshared(pthread_rwlockattr_t* __attr, int __shared);
 int pthread_rwlockattr_getkind_np(const pthread_rwlockattr_t* __attr, int* __kind)
   __INTRODUCED_IN(23);
 int pthread_rwlockattr_setkind_np(pthread_rwlockattr_t* __attr, int __kind) __INTRODUCED_IN(23);

 int pthread_rwlock_clockrdlock(pthread_rwlock_t* __rwlock, clockid_t __clock,
                                const struct timespec* __timeout) __INTRODUCED_IN(30);
 int pthread_rwlock_clockwrlock(pthread_rwlock_t* __rwlock, clockid_t __clock,
                                const struct timespec* __timeout) __INTRODUCED_IN(30);
 int pthread_rwlock_destroy(pthread_rwlock_t* __rwlock);
 int pthread_rwlock_init(pthread_rwlock_t* __rwlock, const pthread_rwlockattr_t* __attr);
 int pthread_rwlock_rdlock(pthread_rwlock_t* __rwlock);
 int pthread_rwlock_timedrdlock(pthread_rwlock_t* __rwlock, const struct timespec* __timeout);
 /* See the comment on pthread_mutex_timedlock_monotonic_np for usage of this function. */
 int pthread_rwlock_timedrdlock_monotonic_np(pthread_rwlock_t* __rwlock,
                                             const struct timespec* __timeout) __INTRODUCED_IN(28);
 int pthread_rwlock_timedwrlock(pthread_rwlock_t* __rwlock, const struct timespec* __timeout);
 /* See the comment on pthread_mutex_timedlock_monotonic_np for usage of this function. */
 int pthread_rwlock_timedwrlock_monotonic_np(pthread_rwlock_t* __rwlock,
                                             const struct timespec* __timeout) __INTRODUCED_IN(28);
 int pthread_rwlock_tryrdlock(pthread_rwlock_t* __rwlock);
 int pthread_rwlock_trywrlock(pthread_rwlock_t* __rwlock);
 int pthread_rwlock_unlock(pthread_rwlock_t* __rwlock);
 int pthread_rwlock_wrlock(pthread_rwlock_t* __rwlock);

 #if __ANDROID_API__ >= __ANDROID_API_N__
 int pthread_barrierattr_init(pthread_barrierattr_t* __attr) __INTRODUCED_IN(24);
 int pthread_barrierattr_destroy(pthread_barrierattr_t* __attr) __INTRODUCED_IN(24);
 int pthread_barrierattr_getpshared(const pthread_barrierattr_t* __attr, int* __shared) __INTRODUCED_IN(24);
 int pthread_barrierattr_setpshared(pthread_barrierattr_t* __attr, int __shared) __INTRODUCED_IN(24);
 #endif

 #if __ANDROID_API__ >= __ANDROID_API_N__
 int pthread_barrier_init(pthread_barrier_t* __barrier, const pthread_barrierattr_t* __attr, unsigned __count) __INTRODUCED_IN(24);
 int pthread_barrier_destroy(pthread_barrier_t* __barrier) __INTRODUCED_IN(24);
 int pthread_barrier_wait(pthread_barrier_t* __barrier) __INTRODUCED_IN(24);
 #endif

 #if __ANDROID_API__ >= __ANDROID_API_N__
 int pthread_spin_destroy(pthread_spinlock_t* __spinlock) __INTRODUCED_IN(24);
 int pthread_spin_init(pthread_spinlock_t* __spinlock, int __shared) __INTRODUCED_IN(24);
 int pthread_spin_lock(pthread_spinlock_t* __spinlock) __INTRODUCED_IN(24);
 int pthread_spin_trylock(pthread_spinlock_t* __spinlock) __INTRODUCED_IN(24);
 int pthread_spin_unlock(pthread_spinlock_t* __spinlock) __INTRODUCED_IN(24);
 #endif

 pthread_t pthread_self(void) __attribute_const__;

 #if defined(__USE_GNU)
 int pthread_getname_np(pthread_t __pthread, char* __buf, size_t __n) __INTRODUCED_IN(26);
 #endif
 /* TODO: this should be __USE_GNU too. */
 int pthread_setname_np(pthread_t __pthread, const char* __name);

 int pthread_setschedparam(pthread_t __pthread, int __policy, const struct sched_param* __param);
 int pthread_setschedprio(pthread_t __pthread, int __priority) __INTRODUCED_IN(28);

 int pthread_setspecific(pthread_key_t __key, const void* __value);

 typedef void (*__pthread_cleanup_func_t)(void*);

 typedef struct __pthread_cleanup_t {
   struct __pthread_cleanup_t*   __cleanup_prev;
   __pthread_cleanup_func_t      __cleanup_routine;
   void*                         __cleanup_arg;
 } __pthread_cleanup_t;

 void __pthread_cleanup_push(__pthread_cleanup_t* c, __pthread_cleanup_func_t, void*);
 void __pthread_cleanup_pop(__pthread_cleanup_t*, int);

 /* Believe or not, the definitions of pthread_cleanup_push and
  * pthread_cleanup_pop below are correct. Posix states that these
  * can be implemented as macros that might introduce opening and
  * closing braces, and that using setjmp/longjmp/return/break/continue
  * between them results in undefined behavior.
  */
 #define  pthread_cleanup_push(routine, arg)                      \
     do {                                                         \
         __pthread_cleanup_t  __cleanup;                          \
         __pthread_cleanup_push( &__cleanup, (routine), (arg) );  \

 #define  pthread_cleanup_pop(execute)                  \
         __pthread_cleanup_pop( &__cleanup, (execute)); \
     } while (0);                                       \

 __END_DECLS

 #endif
	/*
	* Copyright (C) 2008 The Android Open Source Project
	* All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	* * Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* * Redistributions in binary form must reproduce the above copyright
	* notice, this list of conditions and the following disclaimer in
	* the documentation and/or other materials provided with the
	* distribution.
	*
	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
	* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
	* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
	* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
	* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
	* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
	* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
	* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	* SUCH DAMAGE.
	*/

	#ifndef _PTHREAD_H_
	#define _PTHREAD_H_

	#include <limits.h>
	#include <bits/pthread_types.h>
	#include <sched.h>
	#include <sys/cdefs.h>
	#include <sys/types.h>
	#include <time.h>

	__BEGIN_DECLS

	enum {
	PTHREAD_MUTEX_NORMAL = 0,
	PTHREAD_MUTEX_RECURSIVE = 1,
	PTHREAD_MUTEX_ERRORCHECK = 2,

	PTHREAD_MUTEX_ERRORCHECK_NP = PTHREAD_MUTEX_ERRORCHECK,
	PTHREAD_MUTEX_RECURSIVE_NP = PTHREAD_MUTEX_RECURSIVE,

	PTHREAD_MUTEX_DEFAULT = PTHREAD_MUTEX_NORMAL
	};

	#define PTHREAD_MUTEX_INITIALIZER { { ((PTHREAD_MUTEX_NORMAL & 3) << 14) } }
	#define PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP { { ((PTHREAD_MUTEX_RECURSIVE & 3) << 14) } }
	#define PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP { { ((PTHREAD_MUTEX_ERRORCHECK & 3) << 14) } }

	#define PTHREAD_COND_INITIALIZER { { 0 } }
	#if __ANDROID_API__ >= __ANDROID_API_L__
	#define PTHREAD_COND_INITIALIZER_MONOTONIC_NP { { 1 << 1 } }
	#endif

	#define PTHREAD_RWLOCK_INITIALIZER { { 0 } }

	enum {
	PTHREAD_RWLOCK_PREFER_READER_NP = 0,
	PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP = 1,
	};

	#define PTHREAD_ONCE_INIT 0

	#if __ANDROID_API__ >= __ANDROID_API_N__
	#define PTHREAD_BARRIER_SERIAL_THREAD -1
	#endif

	#if defined(__LP64__)
	#define PTHREAD_STACK_MIN (4 * PAGE_SIZE)
	#else
	#define PTHREAD_STACK_MIN (2 * PAGE_SIZE)
	#endif

	#define PTHREAD_CREATE_DETACHED 1
	#define PTHREAD_CREATE_JOINABLE 0

	#define PTHREAD_EXPLICIT_SCHED 0
	#define PTHREAD_INHERIT_SCHED 1

	#define PTHREAD_PRIO_NONE 0
	#define PTHREAD_PRIO_INHERIT 1

	#define PTHREAD_PROCESS_PRIVATE 0
	#define PTHREAD_PROCESS_SHARED 1

	#define PTHREAD_SCOPE_SYSTEM 0
	#define PTHREAD_SCOPE_PROCESS 1

	int pthread_atfork(void (__prepare)(void), void (__parent)(void), void (*__child)(void));

	int pthread_attr_destroy(pthread_attr_t* __attr);
	int pthread_attr_getdetachstate(const pthread_attr_t* __attr, int* __state);
	int pthread_attr_getguardsize(const pthread_attr_t* __attr, size_t* __size);
	int pthread_attr_getinheritsched(const pthread_attr_t* __attr, int* __flag) __INTRODUCED_IN(28);
	int pthread_attr_getschedparam(const pthread_attr_t* __attr, struct sched_param* __param);
	int pthread_attr_getschedpolicy(const pthread_attr_t* __attr, int* __policy);
	int pthread_attr_getscope(const pthread_attr_t* __attr, int* __scope);
	int pthread_attr_getstack(const pthread_attr_t* __attr, void** __addr, size_t* __size);
	int pthread_attr_getstacksize(const pthread_attr_t* __attr, size_t* __size);
	int pthread_attr_init(pthread_attr_t* __attr);
	int pthread_attr_setdetachstate(pthread_attr_t* __attr, int __state);
	int pthread_attr_setguardsize(pthread_attr_t* __attr, size_t __size);
	int pthread_attr_setinheritsched(pthread_attr_t* __attr, int __flag) __INTRODUCED_IN(28);
	int pthread_attr_setschedparam(pthread_attr_t* __attr, const struct sched_param* __param);
	int pthread_attr_setschedpolicy(pthread_attr_t* __attr, int __policy);
	int pthread_attr_setscope(pthread_attr_t* __attr, int __scope);
	int pthread_attr_setstack(pthread_attr_t* __attr, void* __addr, size_t __size);
	int pthread_attr_setstacksize(pthread_attr_t* __addr, size_t __size);

	int pthread_condattr_destroy(pthread_condattr_t* __attr);
	int pthread_condattr_getclock(const pthread_condattr_t* __attr, clockid_t* __clock) __INTRODUCED_IN(21);
	int pthread_condattr_getpshared(const pthread_condattr_t* __attr, int* __shared);
	int pthread_condattr_init(pthread_condattr_t* __attr);
	int pthread_condattr_setclock(pthread_condattr_t* __attr, clockid_t __clock) __INTRODUCED_IN(21);
	int pthread_condattr_setpshared(pthread_condattr_t* __attr, int __shared);

	int pthread_cond_broadcast(pthread_cond_t* __cond);
	int pthread_cond_clockwait(pthread_cond_t* __cond, pthread_mutex_t* __mutex, clockid_t __clock,
	const struct timespec* __timeout) __INTRODUCED_IN(30);
	int pthread_cond_destroy(pthread_cond_t* __cond);
	int pthread_cond_init(pthread_cond_t* __cond, const pthread_condattr_t* __attr);
	int pthread_cond_signal(pthread_cond_t* __cond);
	int pthread_cond_timedwait(pthread_cond_t* __cond, pthread_mutex_t* __mutex, const struct timespec* __timeout);
	/*
	* Condition variables use CLOCK_REALTIME by default for their timeouts, however that is
	* typically inappropriate, since that clock can change dramatically, causing the timeout to
	* either expire earlier or much later than intended.
	* Condition variables have an initialization option to use CLOCK_MONOTONIC, and in addition,
	* Android provides pthread_cond_timedwait_monotonic_np to use CLOCK_MONOTONIC on a condition
	* variable for this single wait no matter how it was initialized.
	* Note that pthread_cond_clockwait() allows specifying an arbitrary clock and has superseded this
	* function.
	*/
	int pthread_cond_timedwait_monotonic_np(pthread_cond_t* __cond, pthread_mutex_t* __mutex,
	const struct timespec* __timeout) __INTRODUCED_IN_64(28);
	int pthread_cond_wait(pthread_cond_t* __cond, pthread_mutex_t* __mutex);

	#if defined(__clang__)
	/*
	* Disable -Wbuiltin-requires-header because clang confuses this declaration with the one defined in
	* "llvm/tools/clang/include/clang/Basic/Builtins.def", which did not define any formal arguments.
	* It seems to be an upstream bug and the fix (https://reviews.llvm.org/D58531) is still under
	* review. Thus, let's disable the warning for this function declaration.
	*/
	#pragma clang diagnostic push
	#pragma clang diagnostic ignored "-Wbuiltin-requires-header"
	#endif
	int pthread_create(pthread_t* __pthread_ptr, pthread_attr_t const* __attr, void* (__start_routine)(void), void*);
	#if defined(__clang__)
	#pragma clang diagnostic pop
	#endif

	int pthread_detach(pthread_t __pthread);
	void pthread_exit(void* __return_value) __noreturn;

	int pthread_equal(pthread_t __lhs, pthread_t __rhs);

	int pthread_getattr_np(pthread_t __pthread, pthread_attr_t* __attr);

	int pthread_getcpuclockid(pthread_t __pthread, clockid_t* __clock);

	int pthread_getschedparam(pthread_t __pthread, int* __policy, struct sched_param* __param);

	void* pthread_getspecific(pthread_key_t __key);

	pid_t pthread_gettid_np(pthread_t __pthread) __INTRODUCED_IN(21);

	int pthread_join(pthread_t __pthread, void** __return_value_ptr);

	int pthread_key_create(pthread_key_t* __key_ptr, void (__key_destructor)(void));
	int pthread_key_delete(pthread_key_t __key);

	int pthread_mutexattr_destroy(pthread_mutexattr_t* __attr);
	int pthread_mutexattr_getpshared(const pthread_mutexattr_t* __attr, int* __shared);
	int pthread_mutexattr_gettype(const pthread_mutexattr_t* __attr, int* __type);
	int pthread_mutexattr_getprotocol(const pthread_mutexattr_t* __attr, int* __protocol) __INTRODUCED_IN(28);
	int pthread_mutexattr_init(pthread_mutexattr_t* __attr);
	int pthread_mutexattr_setpshared(pthread_mutexattr_t* __attr, int __shared);
	int pthread_mutexattr_settype(pthread_mutexattr_t* __attr, int __type);
	int pthread_mutexattr_setprotocol(pthread_mutexattr_t* __attr, int __protocol) __INTRODUCED_IN(28);

	int pthread_mutex_clocklock(pthread_mutex_t* __mutex, clockid_t __clock,
	const struct timespec* __abstime) __INTRODUCED_IN(30);
	int pthread_mutex_destroy(pthread_mutex_t* __mutex);
	int pthread_mutex_init(pthread_mutex_t* __mutex, const pthread_mutexattr_t* __attr);
	int pthread_mutex_lock(pthread_mutex_t* __mutex);
	int pthread_mutex_timedlock(pthread_mutex_t* __mutex, const struct timespec* __timeout)
	__INTRODUCED_IN(21);

	/*
	* POSIX historically only supported using pthread_mutex_timedlock() with CLOCK_REALTIME, however
	* that is typically inappropriate, since that clock can change dramatically, causing the timeout to
	* either expire earlier or much later than intended.
	* This function is added to use a timespec based on CLOCK_MONOTONIC that does not suffer
	* from this issue.
	* Note that pthread_mutex_clocklock() allows specifying an arbitrary clock and has superseded this
	* function.
	*/
	int pthread_mutex_timedlock_monotonic_np(pthread_mutex_t* __mutex, const struct timespec* __timeout)
	__INTRODUCED_IN(28);
	int pthread_mutex_trylock(pthread_mutex_t* __mutex);
	int pthread_mutex_unlock(pthread_mutex_t* __mutex);

	#if __ANDROID_API__ < 21
	/*
	* Cruft for supporting old API levels. Pre-L we didn't have the proper POSIX
	* APIs for things, but instead had some locally grown, artisan equivalents.
	* Keep exposing the old prototypes on old API levels so we don't regress
	* functionality.
	*
	* See the following bugs:
	* * https://github.com/android-ndk/ndk/issues/420
	* * https://github.com/android-ndk/ndk/issues/423
	* * https://stackoverflow.com/q/44580542/632035
	*/
	int pthread_mutex_lock_timeout_np(pthread_mutex_t* __mutex, unsigned __timeout_ms);
	int pthread_cond_timeout_np(pthread_cond_t* __cond, pthread_mutex_t* __mutex, unsigned __timeout_ms);
	int pthread_cond_timedwait_relative_np(pthread_cond_t* __cond, pthread_mutex_t* __mutex, const struct timespec* __relative_timeout);
	#endif

	int pthread_once(pthread_once_t* __once, void (*__init_routine)(void));

	int pthread_rwlockattr_init(pthread_rwlockattr_t* __attr);
	int pthread_rwlockattr_destroy(pthread_rwlockattr_t* __attr);
	int pthread_rwlockattr_getpshared(const pthread_rwlockattr_t* __attr, int* __shared);
	int pthread_rwlockattr_setpshared(pthread_rwlockattr_t* __attr, int __shared);
	int pthread_rwlockattr_getkind_np(const pthread_rwlockattr_t* __attr, int* __kind)
	__INTRODUCED_IN(23);
	int pthread_rwlockattr_setkind_np(pthread_rwlockattr_t* __attr, int __kind) __INTRODUCED_IN(23);

	int pthread_rwlock_clockrdlock(pthread_rwlock_t* __rwlock, clockid_t __clock,
	const struct timespec* __timeout) __INTRODUCED_IN(30);
	int pthread_rwlock_clockwrlock(pthread_rwlock_t* __rwlock, clockid_t __clock,
	const struct timespec* __timeout) __INTRODUCED_IN(30);
	int pthread_rwlock_destroy(pthread_rwlock_t* __rwlock);
	int pthread_rwlock_init(pthread_rwlock_t* __rwlock, const pthread_rwlockattr_t* __attr);
	int pthread_rwlock_rdlock(pthread_rwlock_t* __rwlock);
	int pthread_rwlock_timedrdlock(pthread_rwlock_t* __rwlock, const struct timespec* __timeout);
	/* See the comment on pthread_mutex_timedlock_monotonic_np for usage of this function. */
	int pthread_rwlock_timedrdlock_monotonic_np(pthread_rwlock_t* __rwlock,
	const struct timespec* __timeout) __INTRODUCED_IN(28);
	int pthread_rwlock_timedwrlock(pthread_rwlock_t* __rwlock, const struct timespec* __timeout);
	/* See the comment on pthread_mutex_timedlock_monotonic_np for usage of this function. */
	int pthread_rwlock_timedwrlock_monotonic_np(pthread_rwlock_t* __rwlock,
	const struct timespec* __timeout) __INTRODUCED_IN(28);
	int pthread_rwlock_tryrdlock(pthread_rwlock_t* __rwlock);
	int pthread_rwlock_trywrlock(pthread_rwlock_t* __rwlock);
	int pthread_rwlock_unlock(pthread_rwlock_t* __rwlock);
	int pthread_rwlock_wrlock(pthread_rwlock_t* __rwlock);

	#if __ANDROID_API__ >= __ANDROID_API_N__
	int pthread_barrierattr_init(pthread_barrierattr_t* __attr) __INTRODUCED_IN(24);
	int pthread_barrierattr_destroy(pthread_barrierattr_t* __attr) __INTRODUCED_IN(24);
	int pthread_barrierattr_getpshared(const pthread_barrierattr_t* __attr, int* __shared) __INTRODUCED_IN(24);
	int pthread_barrierattr_setpshared(pthread_barrierattr_t* __attr, int __shared) __INTRODUCED_IN(24);
	#endif

	#if __ANDROID_API__ >= __ANDROID_API_N__
	int pthread_barrier_init(pthread_barrier_t* __barrier, const pthread_barrierattr_t* __attr, unsigned __count) __INTRODUCED_IN(24);
	int pthread_barrier_destroy(pthread_barrier_t* __barrier) __INTRODUCED_IN(24);
	int pthread_barrier_wait(pthread_barrier_t* __barrier) __INTRODUCED_IN(24);
	#endif

	#if __ANDROID_API__ >= __ANDROID_API_N__
	int pthread_spin_destroy(pthread_spinlock_t* __spinlock) __INTRODUCED_IN(24);
	int pthread_spin_init(pthread_spinlock_t* __spinlock, int __shared) __INTRODUCED_IN(24);
	int pthread_spin_lock(pthread_spinlock_t* __spinlock) __INTRODUCED_IN(24);
	int pthread_spin_trylock(pthread_spinlock_t* __spinlock) __INTRODUCED_IN(24);
	int pthread_spin_unlock(pthread_spinlock_t* __spinlock) __INTRODUCED_IN(24);
	#endif

	pthread_t pthread_self(void) __attribute_const__;

	#if defined(__USE_GNU)
	int pthread_getname_np(pthread_t __pthread, char* __buf, size_t __n) __INTRODUCED_IN(26);
	#endif
	/* TODO: this should be __USE_GNU too. */
	int pthread_setname_np(pthread_t __pthread, const char* __name);

	int pthread_setschedparam(pthread_t __pthread, int __policy, const struct sched_param* __param);
	int pthread_setschedprio(pthread_t __pthread, int __priority) __INTRODUCED_IN(28);

	int pthread_setspecific(pthread_key_t __key, const void* __value);

	typedef void (__pthread_cleanup_func_t)(void);

	typedef struct __pthread_cleanup_t {
	struct __pthread_cleanup_t* __cleanup_prev;
	__pthread_cleanup_func_t __cleanup_routine;
	void* __cleanup_arg;
	} __pthread_cleanup_t;

	void __pthread_cleanup_push(__pthread_cleanup_t* c, __pthread_cleanup_func_t, void*);
	void __pthread_cleanup_pop(__pthread_cleanup_t*, int);

	/* Believe or not, the definitions of pthread_cleanup_push and
	* pthread_cleanup_pop below are correct. Posix states that these
	* can be implemented as macros that might introduce opening and
	* closing braces, and that using setjmp/longjmp/return/break/continue
	* between them results in undefined behavior.
	*/
	#define pthread_cleanup_push(routine, arg) \
	do { \
	__pthread_cleanup_t __cleanup; \
	__pthread_cleanup_push( &__cleanup, (routine), (arg) ); \

	#define pthread_cleanup_pop(execute) \
	__pthread_cleanup_pop( &__cleanup, (execute)); \
	} while (0); \

	__END_DECLS

	#endif