include/__threading_support - platform/external/libcxx - Gitiles

 // -*- C++ -*-
 //===----------------------------------------------------------------------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is dual licensed under the MIT and the University of Illinois Open
 // Source Licenses. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//

 #ifndef _LIBCPP_THREADING_SUPPORT
 #define _LIBCPP_THREADING_SUPPORT

 #include <__config>
 #include <chrono>
 #include <errno.h>

 #ifndef _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER
 #pragma GCC system_header
 #endif

 #if defined(_LIBCPP_HAS_THREAD_API_EXTERNAL)
 # include <__external_threading>
 #elif !defined(_LIBCPP_HAS_NO_THREADS)

 #if defined(_LIBCPP_HAS_THREAD_API_PTHREAD)
 # include <pthread.h>
 # include <sched.h>
 #endif

 _LIBCPP_PUSH_MACROS
 #include <__undef_macros>

 #if defined(_LIBCPP_HAS_THREAD_LIBRARY_EXTERNAL) || \
     defined(_LIBCPP_BUILDING_THREAD_LIBRARY_EXTERNAL) || \
     defined(_LIBCPP_HAS_THREAD_API_WIN32)
 #define _LIBCPP_THREAD_ABI_VISIBILITY _LIBCPP_FUNC_VIS
 #else
 #define _LIBCPP_THREAD_ABI_VISIBILITY inline _LIBCPP_INLINE_VISIBILITY
 #endif

 #if defined(__FreeBSD__) && defined(__clang__) && __has_attribute(no_thread_safety_analysis)
 #define _LIBCPP_NO_THREAD_SAFETY_ANALYSIS __attribute__((no_thread_safety_analysis))
 #else
 #define _LIBCPP_NO_THREAD_SAFETY_ANALYSIS
 #endif

 _LIBCPP_BEGIN_NAMESPACE_STD

 #if defined(_LIBCPP_HAS_THREAD_API_PTHREAD)
 // Mutex
 typedef pthread_mutex_t __libcpp_mutex_t;
 #define _LIBCPP_MUTEX_INITIALIZER PTHREAD_MUTEX_INITIALIZER

 typedef pthread_mutex_t __libcpp_recursive_mutex_t;

 // Condition Variable
 typedef pthread_cond_t __libcpp_condvar_t;
 #define _LIBCPP_CONDVAR_INITIALIZER PTHREAD_COND_INITIALIZER

 // Execute once
 typedef pthread_once_t __libcpp_exec_once_flag;
 #define _LIBCPP_EXEC_ONCE_INITIALIZER PTHREAD_ONCE_INIT

 // Thread id
 typedef pthread_t __libcpp_thread_id;

 // Thread
 #define _LIBCPP_NULL_THREAD 0U

 typedef pthread_t __libcpp_thread_t;

 // Thread Local Storage
 typedef pthread_key_t __libcpp_tls_key;

 #define _LIBCPP_TLS_DESTRUCTOR_CC
 #else
 // Mutex
 typedef void* __libcpp_mutex_t;
 #define _LIBCPP_MUTEX_INITIALIZER 0

 #if defined(_M_IX86) || defined(__i386__) || defined(_M_ARM) || defined(__arm__)
 typedef void* __libcpp_recursive_mutex_t[6];
 #elif defined(_M_AMD64) || defined(__x86_64__) || defined(_M_ARM64) || defined(__aarch64__)
 typedef void* __libcpp_recursive_mutex_t[5];
 #else
 # error Unsupported architecture
 #endif

 // Condition Variable
 typedef void* __libcpp_condvar_t;
 #define _LIBCPP_CONDVAR_INITIALIZER 0

 // Execute Once
 typedef void* __libcpp_exec_once_flag;
 #define _LIBCPP_EXEC_ONCE_INITIALIZER 0

 // Thread ID
 typedef long __libcpp_thread_id;

 // Thread
 #define _LIBCPP_NULL_THREAD 0U

 typedef void* __libcpp_thread_t;

 // Thread Local Storage
 typedef long __libcpp_tls_key;

 #define _LIBCPP_TLS_DESTRUCTOR_CC __stdcall
 #endif

 // Mutex
 _LIBCPP_THREAD_ABI_VISIBILITY
 int __libcpp_recursive_mutex_init(__libcpp_recursive_mutex_t *__m);

 _LIBCPP_THREAD_ABI_VISIBILITY _LIBCPP_NO_THREAD_SAFETY_ANALYSIS
 int __libcpp_recursive_mutex_lock(__libcpp_recursive_mutex_t *__m);

 _LIBCPP_THREAD_ABI_VISIBILITY _LIBCPP_NO_THREAD_SAFETY_ANALYSIS
 bool __libcpp_recursive_mutex_trylock(__libcpp_recursive_mutex_t *__m);

 _LIBCPP_THREAD_ABI_VISIBILITY _LIBCPP_NO_THREAD_SAFETY_ANALYSIS
 int __libcpp_recursive_mutex_unlock(__libcpp_recursive_mutex_t *__m);

 _LIBCPP_THREAD_ABI_VISIBILITY
 int __libcpp_recursive_mutex_destroy(__libcpp_recursive_mutex_t *__m);

 _LIBCPP_THREAD_ABI_VISIBILITY _LIBCPP_NO_THREAD_SAFETY_ANALYSIS
 int __libcpp_mutex_lock(__libcpp_mutex_t *__m);

 _LIBCPP_THREAD_ABI_VISIBILITY _LIBCPP_NO_THREAD_SAFETY_ANALYSIS
 bool __libcpp_mutex_trylock(__libcpp_mutex_t *__m);

 _LIBCPP_THREAD_ABI_VISIBILITY _LIBCPP_NO_THREAD_SAFETY_ANALYSIS
 int __libcpp_mutex_unlock(__libcpp_mutex_t *__m);

 _LIBCPP_THREAD_ABI_VISIBILITY
 int __libcpp_mutex_destroy(__libcpp_mutex_t *__m);

 // Condition variable
 _LIBCPP_THREAD_ABI_VISIBILITY
 int __libcpp_condvar_signal(__libcpp_condvar_t* __cv);

 _LIBCPP_THREAD_ABI_VISIBILITY
 int __libcpp_condvar_broadcast(__libcpp_condvar_t* __cv);

 _LIBCPP_THREAD_ABI_VISIBILITY _LIBCPP_NO_THREAD_SAFETY_ANALYSIS
 int __libcpp_condvar_wait(__libcpp_condvar_t* __cv, __libcpp_mutex_t* __m);

 _LIBCPP_THREAD_ABI_VISIBILITY _LIBCPP_NO_THREAD_SAFETY_ANALYSIS
 int __libcpp_condvar_timedwait(__libcpp_condvar_t *__cv, __libcpp_mutex_t *__m,
                                timespec *__ts);

 _LIBCPP_THREAD_ABI_VISIBILITY
 int __libcpp_condvar_destroy(__libcpp_condvar_t* __cv);

 // Execute once
 _LIBCPP_THREAD_ABI_VISIBILITY
 int __libcpp_execute_once(__libcpp_exec_once_flag *flag,
                           void (*init_routine)(void));

 // Thread id
 _LIBCPP_THREAD_ABI_VISIBILITY
 bool __libcpp_thread_id_equal(__libcpp_thread_id t1, __libcpp_thread_id t2);

 _LIBCPP_THREAD_ABI_VISIBILITY
 bool __libcpp_thread_id_less(__libcpp_thread_id t1, __libcpp_thread_id t2);

 // Thread
 _LIBCPP_THREAD_ABI_VISIBILITY
 bool __libcpp_thread_isnull(const __libcpp_thread_t *__t);

 _LIBCPP_THREAD_ABI_VISIBILITY
 int __libcpp_thread_create(__libcpp_thread_t *__t, void *(*__func)(void *),
                            void *__arg);

 _LIBCPP_THREAD_ABI_VISIBILITY
 __libcpp_thread_id __libcpp_thread_get_current_id();

 _LIBCPP_THREAD_ABI_VISIBILITY
 __libcpp_thread_id __libcpp_thread_get_id(const __libcpp_thread_t *__t);

 _LIBCPP_THREAD_ABI_VISIBILITY
 int __libcpp_thread_join(__libcpp_thread_t *__t);

 _LIBCPP_THREAD_ABI_VISIBILITY
 int __libcpp_thread_detach(__libcpp_thread_t *__t);

 _LIBCPP_THREAD_ABI_VISIBILITY
 void __libcpp_thread_yield();

 _LIBCPP_THREAD_ABI_VISIBILITY
 void __libcpp_thread_sleep_for(const chrono::nanoseconds& __ns);

 // Thread local storage
 _LIBCPP_THREAD_ABI_VISIBILITY
 int __libcpp_tls_create(__libcpp_tls_key* __key,
                         void(_LIBCPP_TLS_DESTRUCTOR_CC* __at_exit)(void*));

 _LIBCPP_THREAD_ABI_VISIBILITY
 void *__libcpp_tls_get(__libcpp_tls_key __key);

 _LIBCPP_THREAD_ABI_VISIBILITY
 int __libcpp_tls_set(__libcpp_tls_key __key, void *__p);

 #if (!defined(_LIBCPP_HAS_THREAD_LIBRARY_EXTERNAL) || \
      defined(_LIBCPP_BUILDING_THREAD_LIBRARY_EXTERNAL)) && \
     defined(_LIBCPP_HAS_THREAD_API_PTHREAD)

 int __libcpp_recursive_mutex_init(__libcpp_recursive_mutex_t *__m)
 {
   pthread_mutexattr_t attr;
   int __ec = pthread_mutexattr_init(&attr);
   if (__ec)
     return __ec;
   __ec = pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
   if (__ec) {
     pthread_mutexattr_destroy(&attr);
     return __ec;
   }
   __ec = pthread_mutex_init(__m, &attr);
   if (__ec) {
     pthread_mutexattr_destroy(&attr);
     return __ec;
   }
   __ec = pthread_mutexattr_destroy(&attr);
   if (__ec) {
     pthread_mutex_destroy(__m);
     return __ec;
   }
   return 0;
 }

 int __libcpp_recursive_mutex_lock(__libcpp_recursive_mutex_t *__m)
 {
   return pthread_mutex_lock(__m);
 }

 bool __libcpp_recursive_mutex_trylock(__libcpp_recursive_mutex_t *__m)
 {
   return pthread_mutex_trylock(__m) == 0;
 }

 int __libcpp_recursive_mutex_unlock(__libcpp_mutex_t *__m)
 {
   return pthread_mutex_unlock(__m);
 }

 int __libcpp_recursive_mutex_destroy(__libcpp_recursive_mutex_t *__m)
 {
   return pthread_mutex_destroy(__m);
 }

 int __libcpp_mutex_lock(__libcpp_mutex_t *__m)
 {
   return pthread_mutex_lock(__m);
 }

 bool __libcpp_mutex_trylock(__libcpp_mutex_t *__m)
 {
   return pthread_mutex_trylock(__m) == 0;
 }

 int __libcpp_mutex_unlock(__libcpp_mutex_t *__m)
 {
   return pthread_mutex_unlock(__m);
 }

 int __libcpp_mutex_destroy(__libcpp_mutex_t *__m)
 {
   return pthread_mutex_destroy(__m);
 }

 // Condition Variable
 int __libcpp_condvar_signal(__libcpp_condvar_t *__cv)
 {
   return pthread_cond_signal(__cv);
 }

 int __libcpp_condvar_broadcast(__libcpp_condvar_t *__cv)
 {
   return pthread_cond_broadcast(__cv);
 }

 int __libcpp_condvar_wait(__libcpp_condvar_t *__cv, __libcpp_mutex_t *__m)
 {
   return pthread_cond_wait(__cv, __m);
 }

 int __libcpp_condvar_timedwait(__libcpp_condvar_t *__cv, __libcpp_mutex_t *__m,
                                timespec *__ts)
 {
   return pthread_cond_timedwait(__cv, __m, __ts);
 }

 int __libcpp_condvar_destroy(__libcpp_condvar_t *__cv)
 {
   return pthread_cond_destroy(__cv);
 }

 // Execute once
 int __libcpp_execute_once(__libcpp_exec_once_flag *flag,
                           void (*init_routine)(void)) {
   return pthread_once(flag, init_routine);
 }

 // Thread id
 // Returns non-zero if the thread ids are equal, otherwise 0
 bool __libcpp_thread_id_equal(__libcpp_thread_id t1, __libcpp_thread_id t2)
 {
   return pthread_equal(t1, t2) != 0;
 }

 // Returns non-zero if t1 < t2, otherwise 0
 bool __libcpp_thread_id_less(__libcpp_thread_id t1, __libcpp_thread_id t2)
 {
   return t1 < t2;
 }

 // Thread
 bool __libcpp_thread_isnull(const __libcpp_thread_t *__t) {
   return *__t == 0;
 }

 int __libcpp_thread_create(__libcpp_thread_t *__t, void *(*__func)(void *),
                            void *__arg)
 {
   return pthread_create(__t, 0, __func, __arg);
 }

 __libcpp_thread_id __libcpp_thread_get_current_id()
 {
   return pthread_self();
 }

 __libcpp_thread_id __libcpp_thread_get_id(const __libcpp_thread_t *__t)
 {
   return *__t;
 }

 int __libcpp_thread_join(__libcpp_thread_t *__t)
 {
   return pthread_join(*__t, 0);
 }

 int __libcpp_thread_detach(__libcpp_thread_t *__t)
 {
   return pthread_detach(*__t);
 }

 void __libcpp_thread_yield()
 {
   sched_yield();
 }

 void __libcpp_thread_sleep_for(const chrono::nanoseconds& __ns)
 {
    using namespace chrono;
    seconds __s = duration_cast<seconds>(__ns);
    timespec __ts;
    typedef decltype(__ts.tv_sec) ts_sec;
    _LIBCPP_CONSTEXPR ts_sec __ts_sec_max = numeric_limits<ts_sec>::max();

    if (__s.count() < __ts_sec_max)
    {
      __ts.tv_sec = static_cast<ts_sec>(__s.count());
      __ts.tv_nsec = static_cast<decltype(__ts.tv_nsec)>((__ns - __s).count());
    }
    else
    {
      __ts.tv_sec = __ts_sec_max;
      __ts.tv_nsec = 999999999; // (10^9 - 1)
    }

    while (nanosleep(&__ts, &__ts) == -1 && errno == EINTR);
 }

 // Thread local storage
 int __libcpp_tls_create(__libcpp_tls_key *__key, void (*__at_exit)(void *))
 {
   return pthread_key_create(__key, __at_exit);
 }

 void *__libcpp_tls_get(__libcpp_tls_key __key)
 {
   return pthread_getspecific(__key);
 }

 int __libcpp_tls_set(__libcpp_tls_key __key, void *__p)
 {
     return pthread_setspecific(__key, __p);
 }

 #endif // !_LIBCPP_HAS_THREAD_LIBRARY_EXTERNAL || _LIBCPP_BUILDING_THREAD_LIBRARY_EXTERNAL

 _LIBCPP_END_NAMESPACE_STD

 _LIBCPP_POP_MACROS

 #endif // !_LIBCPP_HAS_NO_THREADS

 #endif // _LIBCPP_THREADING_SUPPORT
	// -- C++ --
	//===----------------------------------------------------------------------===//
	//
	// The LLVM Compiler Infrastructure
	//
	// This file is dual licensed under the MIT and the University of Illinois Open
	// Source Licenses. See LICENSE.TXT for details.
	//
	//===----------------------------------------------------------------------===//

	#ifndef _LIBCPP_THREADING_SUPPORT
	#define _LIBCPP_THREADING_SUPPORT

	#include <__config>
	#include <chrono>
	#include <errno.h>

	#ifndef _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER
	#pragma GCC system_header
	#endif

	#if defined(_LIBCPP_HAS_THREAD_API_EXTERNAL)
	# include <__external_threading>
	#elif !defined(_LIBCPP_HAS_NO_THREADS)

	#if defined(_LIBCPP_HAS_THREAD_API_PTHREAD)
	# include <pthread.h>
	# include <sched.h>
	#endif

	_LIBCPP_PUSH_MACROS
	#include <__undef_macros>

	#if defined(_LIBCPP_HAS_THREAD_LIBRARY_EXTERNAL) \|\| \
	defined(_LIBCPP_BUILDING_THREAD_LIBRARY_EXTERNAL) \|\| \
	defined(_LIBCPP_HAS_THREAD_API_WIN32)
	#define _LIBCPP_THREAD_ABI_VISIBILITY _LIBCPP_FUNC_VIS
	#else
	#define _LIBCPP_THREAD_ABI_VISIBILITY inline _LIBCPP_INLINE_VISIBILITY
	#endif

	#if defined(__FreeBSD__) && defined(__clang__) && __has_attribute(no_thread_safety_analysis)
	#define _LIBCPP_NO_THREAD_SAFETY_ANALYSIS __attribute__((no_thread_safety_analysis))
	#else
	#define _LIBCPP_NO_THREAD_SAFETY_ANALYSIS
	#endif

	_LIBCPP_BEGIN_NAMESPACE_STD

	#if defined(_LIBCPP_HAS_THREAD_API_PTHREAD)
	// Mutex
	typedef pthread_mutex_t __libcpp_mutex_t;
	#define _LIBCPP_MUTEX_INITIALIZER PTHREAD_MUTEX_INITIALIZER

	typedef pthread_mutex_t __libcpp_recursive_mutex_t;

	// Condition Variable
	typedef pthread_cond_t __libcpp_condvar_t;
	#define _LIBCPP_CONDVAR_INITIALIZER PTHREAD_COND_INITIALIZER

	// Execute once
	typedef pthread_once_t __libcpp_exec_once_flag;
	#define _LIBCPP_EXEC_ONCE_INITIALIZER PTHREAD_ONCE_INIT

	// Thread id
	typedef pthread_t __libcpp_thread_id;

	// Thread
	#define _LIBCPP_NULL_THREAD 0U

	typedef pthread_t __libcpp_thread_t;

	// Thread Local Storage
	typedef pthread_key_t __libcpp_tls_key;

	#define _LIBCPP_TLS_DESTRUCTOR_CC
	#else
	// Mutex
	typedef void* __libcpp_mutex_t;
	#define _LIBCPP_MUTEX_INITIALIZER 0

	#if defined(_M_IX86) \|\| defined(__i386__) \|\| defined(_M_ARM) \|\| defined(__arm__)
	typedef void* __libcpp_recursive_mutex_t[6];
	#elif defined(_M_AMD64) \|\| defined(__x86_64__) \|\| defined(_M_ARM64) \|\| defined(__aarch64__)
	typedef void* __libcpp_recursive_mutex_t[5];
	#else
	# error Unsupported architecture
	#endif

	// Condition Variable
	typedef void* __libcpp_condvar_t;
	#define _LIBCPP_CONDVAR_INITIALIZER 0

	// Execute Once
	typedef void* __libcpp_exec_once_flag;
	#define _LIBCPP_EXEC_ONCE_INITIALIZER 0

	// Thread ID
	typedef long __libcpp_thread_id;

	// Thread
	#define _LIBCPP_NULL_THREAD 0U

	typedef void* __libcpp_thread_t;

	// Thread Local Storage
	typedef long __libcpp_tls_key;

	#define _LIBCPP_TLS_DESTRUCTOR_CC __stdcall
	#endif

	// Mutex
	_LIBCPP_THREAD_ABI_VISIBILITY
	int __libcpp_recursive_mutex_init(__libcpp_recursive_mutex_t *__m);

	_LIBCPP_THREAD_ABI_VISIBILITY _LIBCPP_NO_THREAD_SAFETY_ANALYSIS
	int __libcpp_recursive_mutex_lock(__libcpp_recursive_mutex_t *__m);

	_LIBCPP_THREAD_ABI_VISIBILITY _LIBCPP_NO_THREAD_SAFETY_ANALYSIS
	bool __libcpp_recursive_mutex_trylock(__libcpp_recursive_mutex_t *__m);

	_LIBCPP_THREAD_ABI_VISIBILITY _LIBCPP_NO_THREAD_SAFETY_ANALYSIS
	int __libcpp_recursive_mutex_unlock(__libcpp_recursive_mutex_t *__m);

	_LIBCPP_THREAD_ABI_VISIBILITY
	int __libcpp_recursive_mutex_destroy(__libcpp_recursive_mutex_t *__m);

	_LIBCPP_THREAD_ABI_VISIBILITY _LIBCPP_NO_THREAD_SAFETY_ANALYSIS
	int __libcpp_mutex_lock(__libcpp_mutex_t *__m);

	_LIBCPP_THREAD_ABI_VISIBILITY _LIBCPP_NO_THREAD_SAFETY_ANALYSIS
	bool __libcpp_mutex_trylock(__libcpp_mutex_t *__m);

	_LIBCPP_THREAD_ABI_VISIBILITY _LIBCPP_NO_THREAD_SAFETY_ANALYSIS
	int __libcpp_mutex_unlock(__libcpp_mutex_t *__m);

	_LIBCPP_THREAD_ABI_VISIBILITY
	int __libcpp_mutex_destroy(__libcpp_mutex_t *__m);

	// Condition variable
	_LIBCPP_THREAD_ABI_VISIBILITY
	int __libcpp_condvar_signal(__libcpp_condvar_t* __cv);

	_LIBCPP_THREAD_ABI_VISIBILITY
	int __libcpp_condvar_broadcast(__libcpp_condvar_t* __cv);

	_LIBCPP_THREAD_ABI_VISIBILITY _LIBCPP_NO_THREAD_SAFETY_ANALYSIS
	int __libcpp_condvar_wait(__libcpp_condvar_t* __cv, __libcpp_mutex_t* __m);

	_LIBCPP_THREAD_ABI_VISIBILITY _LIBCPP_NO_THREAD_SAFETY_ANALYSIS
	int __libcpp_condvar_timedwait(__libcpp_condvar_t __cv, __libcpp_mutex_t __m,
	timespec *__ts);

	_LIBCPP_THREAD_ABI_VISIBILITY
	int __libcpp_condvar_destroy(__libcpp_condvar_t* __cv);

	// Execute once
	_LIBCPP_THREAD_ABI_VISIBILITY
	int __libcpp_execute_once(__libcpp_exec_once_flag *flag,
	void (*init_routine)(void));

	// Thread id
	_LIBCPP_THREAD_ABI_VISIBILITY
	bool __libcpp_thread_id_equal(__libcpp_thread_id t1, __libcpp_thread_id t2);

	_LIBCPP_THREAD_ABI_VISIBILITY
	bool __libcpp_thread_id_less(__libcpp_thread_id t1, __libcpp_thread_id t2);

	// Thread
	_LIBCPP_THREAD_ABI_VISIBILITY
	bool __libcpp_thread_isnull(const __libcpp_thread_t *__t);

	_LIBCPP_THREAD_ABI_VISIBILITY
	int __libcpp_thread_create(__libcpp_thread_t __t, void (__func)(void ),
	void *__arg);

	_LIBCPP_THREAD_ABI_VISIBILITY
	__libcpp_thread_id __libcpp_thread_get_current_id();

	_LIBCPP_THREAD_ABI_VISIBILITY
	__libcpp_thread_id __libcpp_thread_get_id(const __libcpp_thread_t *__t);

	_LIBCPP_THREAD_ABI_VISIBILITY
	int __libcpp_thread_join(__libcpp_thread_t *__t);

	_LIBCPP_THREAD_ABI_VISIBILITY
	int __libcpp_thread_detach(__libcpp_thread_t *__t);

	_LIBCPP_THREAD_ABI_VISIBILITY
	void __libcpp_thread_yield();

	_LIBCPP_THREAD_ABI_VISIBILITY
	void __libcpp_thread_sleep_for(const chrono::nanoseconds& __ns);

	// Thread local storage
	_LIBCPP_THREAD_ABI_VISIBILITY
	int __libcpp_tls_create(__libcpp_tls_key* __key,
	void(_LIBCPP_TLS_DESTRUCTOR_CC* __at_exit)(void*));

	_LIBCPP_THREAD_ABI_VISIBILITY
	void *__libcpp_tls_get(__libcpp_tls_key __key);

	_LIBCPP_THREAD_ABI_VISIBILITY
	int __libcpp_tls_set(__libcpp_tls_key __key, void *__p);

	#if (!defined(_LIBCPP_HAS_THREAD_LIBRARY_EXTERNAL) \|\| \
	defined(_LIBCPP_BUILDING_THREAD_LIBRARY_EXTERNAL)) && \
	defined(_LIBCPP_HAS_THREAD_API_PTHREAD)

	int __libcpp_recursive_mutex_init(__libcpp_recursive_mutex_t *__m)
	{
	pthread_mutexattr_t attr;
	int __ec = pthread_mutexattr_init(&attr);
	if (__ec)
	return __ec;
	__ec = pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
	if (__ec) {
	pthread_mutexattr_destroy(&attr);
	return __ec;
	}
	__ec = pthread_mutex_init(__m, &attr);
	if (__ec) {
	pthread_mutexattr_destroy(&attr);
	return __ec;
	}
	__ec = pthread_mutexattr_destroy(&attr);
	if (__ec) {
	pthread_mutex_destroy(__m);
	return __ec;
	}
	return 0;
	}

	int __libcpp_recursive_mutex_lock(__libcpp_recursive_mutex_t *__m)
	{
	return pthread_mutex_lock(__m);
	}

	bool __libcpp_recursive_mutex_trylock(__libcpp_recursive_mutex_t *__m)
	{
	return pthread_mutex_trylock(__m) == 0;
	}

	int __libcpp_recursive_mutex_unlock(__libcpp_mutex_t *__m)
	{
	return pthread_mutex_unlock(__m);
	}

	int __libcpp_recursive_mutex_destroy(__libcpp_recursive_mutex_t *__m)
	{
	return pthread_mutex_destroy(__m);
	}

	int __libcpp_mutex_lock(__libcpp_mutex_t *__m)
	{
	return pthread_mutex_lock(__m);
	}

	bool __libcpp_mutex_trylock(__libcpp_mutex_t *__m)
	{
	return pthread_mutex_trylock(__m) == 0;
	}

	int __libcpp_mutex_unlock(__libcpp_mutex_t *__m)
	{
	return pthread_mutex_unlock(__m);
	}

	int __libcpp_mutex_destroy(__libcpp_mutex_t *__m)
	{
	return pthread_mutex_destroy(__m);
	}

	// Condition Variable
	int __libcpp_condvar_signal(__libcpp_condvar_t *__cv)
	{
	return pthread_cond_signal(__cv);
	}

	int __libcpp_condvar_broadcast(__libcpp_condvar_t *__cv)
	{
	return pthread_cond_broadcast(__cv);
	}

	int __libcpp_condvar_wait(__libcpp_condvar_t __cv, __libcpp_mutex_t __m)
	{
	return pthread_cond_wait(__cv, __m);
	}

	int __libcpp_condvar_timedwait(__libcpp_condvar_t __cv, __libcpp_mutex_t __m,
	timespec *__ts)
	{
	return pthread_cond_timedwait(__cv, __m, __ts);
	}

	int __libcpp_condvar_destroy(__libcpp_condvar_t *__cv)
	{
	return pthread_cond_destroy(__cv);
	}

	// Execute once
	int __libcpp_execute_once(__libcpp_exec_once_flag *flag,
	void (*init_routine)(void)) {
	return pthread_once(flag, init_routine);
	}

	// Thread id
	// Returns non-zero if the thread ids are equal, otherwise 0
	bool __libcpp_thread_id_equal(__libcpp_thread_id t1, __libcpp_thread_id t2)
	{
	return pthread_equal(t1, t2) != 0;
	}

	// Returns non-zero if t1 < t2, otherwise 0
	bool __libcpp_thread_id_less(__libcpp_thread_id t1, __libcpp_thread_id t2)
	{
	return t1 < t2;
	}

	// Thread
	bool __libcpp_thread_isnull(const __libcpp_thread_t *__t) {
	return *__t == 0;
	}

	int __libcpp_thread_create(__libcpp_thread_t __t, void (__func)(void ),
	void *__arg)
	{
	return pthread_create(__t, 0, __func, __arg);
	}

	__libcpp_thread_id __libcpp_thread_get_current_id()
	{
	return pthread_self();
	}

	__libcpp_thread_id __libcpp_thread_get_id(const __libcpp_thread_t *__t)
	{
	return *__t;
	}

	int __libcpp_thread_join(__libcpp_thread_t *__t)
	{
	return pthread_join(*__t, 0);
	}

	int __libcpp_thread_detach(__libcpp_thread_t *__t)
	{
	return pthread_detach(*__t);
	}

	void __libcpp_thread_yield()
	{
	sched_yield();
	}

	void __libcpp_thread_sleep_for(const chrono::nanoseconds& __ns)
	{
	using namespace chrono;
	seconds __s = duration_cast<seconds>(__ns);
	timespec __ts;
	typedef decltype(__ts.tv_sec) ts_sec;
	_LIBCPP_CONSTEXPR ts_sec __ts_sec_max = numeric_limits<ts_sec>::max();

	if (__s.count() < __ts_sec_max)
	{
	__ts.tv_sec = static_cast<ts_sec>(__s.count());
	__ts.tv_nsec = static_cast<decltype(__ts.tv_nsec)>((__ns - __s).count());
	}
	else
	{
	__ts.tv_sec = __ts_sec_max;
	__ts.tv_nsec = 999999999; // (10^9 - 1)
	}

	while (nanosleep(&__ts, &__ts) == -1 && errno == EINTR);
	}

	// Thread local storage
	int __libcpp_tls_create(__libcpp_tls_key __key, void (__at_exit)(void *))
	{
	return pthread_key_create(__key, __at_exit);
	}

	void *__libcpp_tls_get(__libcpp_tls_key __key)
	{
	return pthread_getspecific(__key);
	}

	int __libcpp_tls_set(__libcpp_tls_key __key, void *__p)
	{
	return pthread_setspecific(__key, __p);
	}

	#endif // !_LIBCPP_HAS_THREAD_LIBRARY_EXTERNAL \|\| _LIBCPP_BUILDING_THREAD_LIBRARY_EXTERNAL

	_LIBCPP_END_NAMESPACE_STD

	_LIBCPP_POP_MACROS

	#endif // !_LIBCPP_HAS_NO_THREADS

	#endif // _LIBCPP_THREADING_SUPPORT