#ifndef JEMALLOC_INTERNAL_MUTEX_STRUCTS_H
#define JEMALLOC_INTERNAL_MUTEX_STRUCTS_H

struct malloc_mutex_s {
	union {
		struct {
#ifdef _WIN32
#  if _WIN32_WINNT >= 0x0600
			SRWLOCK         	lock;
#  else
			CRITICAL_SECTION	lock;
#  endif
#elif (defined(JEMALLOC_OS_UNFAIR_LOCK))
			os_unfair_lock		lock;
#elif (defined(JEMALLOC_OSSPIN))
			OSSpinLock		lock;
#elif (defined(JEMALLOC_MUTEX_INIT_CB))
			pthread_mutex_t		lock;
			malloc_mutex_t		*postponed_next;
#else
			pthread_mutex_t		lock;
#endif
		};
		/*
		 * We only touch witness when configured w/ debug. However we
		 * keep the field in a union when !debug so that we don't have
		 * to pollute the code base with #ifdefs, while avoid paying the
		 * memory cost.
		 */
#if !defined(JEMALLOC_DEBUG)
		witness_t		witness;
#endif
	};

#if defined(JEMALLOC_DEBUG)
	witness_t		witness;
#endif
};

#endif /* JEMALLOC_INTERNAL_MUTEX_STRUCTS_H */