typedef struct _xc_lock_t xc_lock_t;

xc_lock_t *xc_fcntl_init(const char *pathname);
void xc_fcntl_destroy(xc_lock_t *lck);
void xc_fcntl_lock(xc_lock_t *lck);
void xc_fcntl_unlock(xc_lock_t *lck);

#define xc_lock_init(name)  xc_fcntl_init(name)
#define xc_lock_destroy(fd) xc_fcntl_destroy(fd)
#define xc_lock(fd)         xc_fcntl_lock(fd)
#define xc_unlock(fd)       xc_fcntl_unlock(fd)