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#ifndef __XFS_SUPPORT_RWLOCK_H__
#define __XFS_SUPPORT_RWLOCK_H__
#include <sys/param.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/sx.h>
typedef struct sx rwlock_t;
typedef int wait_queue_head_t;
#define rwlock_init(lock) sx_init(lock, "rwlock")
#define rwlock_destroy(lock) sx_destroy(lock)
#define read_lock(lock) sx_slock(lock)
#define read_unlock(lock) sx_sunlock(lock)
#define write_lock(lock) sx_xlock(lock)
#define write_unlock(lock) sx_xunlock(lock)
#define rwlock_trypromote(lock) sx_try_upgrade(lock)
#define rwlock_demote(lock) sx_downgrade(lock)
#endif /* __XFS_SUPPORT_RWLOCK_H__ */
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