func sync.runtime_SemacquireMutex

4 uses

	sync (current package)
		mutex.go#L138: 			runtime_SemacquireMutex(&m.sema, queueLifo, 1)
		runtime.go#L20: func runtime_SemacquireMutex(s *uint32, lifo bool, skipframes int)
		rwmutex.go#L63: 		runtime_SemacquireMutex(&rw.readerSem, false, 0)
		rwmutex.go#L116: 		runtime_SemacquireMutex(&rw.writerSem, false, 0)