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	#ifndef __has_builtin			#ifndef __has_builtin
	#define __has_builtin(x) 0			#define __has_builtin(x) 0
	#endif			#endif
	#ifndef __has_feature			#ifndef __has_feature
	#define __has_feature(x) 0			#define __has_feature(x) 0
	#endif			#endif
	/**			/**
	* Swap macro that enforces a happens-before relationship with a corresponding			* Swap macro that enforces a happens-before relationship with a corresponding
	* ATOMIC_LOAD.			* ATOMIC_LOAD.
	*/			*/
	#if __has_builtin(__c11_atomic_exchange)			#if __has_builtin(__c11_atomic_exchange)
	#define ATOMIC_SWAP(addr, val)\			#define ATOMIC_SWAP(addr, val)\
	__c11_atomic_exchange((_Atomic(__typeof__(val))*)addr, val, __ATOMIC_ACQ_REL)			__c11_atomic_exchange(reinterpret_cast<_Atomic(__typeof__(val))*>(addr), val, __ATOMIC_ACQ_REL)
	#elif __has_builtin(__sync_swap)			#elif __has_builtin(__sync_swap)
	#define ATOMIC_SWAP(addr, val)\			#define ATOMIC_SWAP(addr, val)\
	__sync_swap(addr, val)			__sync_swap(addr, val)
	#else			#else
	#define ATOMIC_SWAP(addr, val)\			#define ATOMIC_SWAP(addr, val)\
	__sync_lock_test_and_set(addr, val)			__sync_lock_test_and_set(addr, val)
	#endif			#endif

	#if __has_builtin(__c11_atomic_load)			#if __has_builtin(__c11_atomic_load)
	#define ATOMIC_LOAD(addr)\			#define ATOMIC_LOAD(addr)\
	__c11_atomic_load((_Atomic(__typeof__(addr)))addr, __ATOMIC_ACQUIRE)			__c11_atomic_load(reinterpret_cast<_Atomic(__typeof__(addr))>(addr), __ATOMIC_ACQUIRE)
	#else			#else
	#define ATOMIC_LOAD(addr)\			#define ATOMIC_LOAD(addr)\
	(__sync_synchronize(), *addr)			(__sync_synchronize(), *addr)
	#endif			#endif