__mtx_lock_sleep
__mtx_lock_sleep(volatile uintptr_t *c, uintptr_t v)
void __mtx_lock_sleep(volatile uintptr_t *c, uintptr_t v, int opts,
void __mtx_lock_sleep(volatile uintptr_t *c, uintptr_t v);
__mtx_lock_sleep(&(m)->mtx_lock, v, o, f, l)
__mtx_lock_sleep(&(m)->mtx_lock, v)