go/sync/mutex.go

37 	mutexLocked = 1 << iota // mutex is locked  const
74 	if atomic.CompareAndSwapInt32(&m.state, 0, mutexLocked) {
89 		if old&(mutexLocked|mutexStarving) == mutexLocked && runtime_canSpin(iter) {
105 			new |= mutexLocked
107 		if old&(mutexLocked|mutexStarving) != 0 {
114 		if starving && old&mutexLocked != 0 {
126 			if old&(mutexLocked|mutexStarving) == 0 {
142 				if old&(mutexLocked|mutexWoken) != 0 || old>>mutexWaiterShift == 0 {
145 				delta := int32(mutexLocked - 1<<mutexWaiterShift)
182 	new := atomic.AddInt32(&m.state, -mutexLocked)
183 	if (new+mutexLocked)&mutexLocked == 0 {
195 			if old>>mutexWaiterShift == 0 || old&(mutexLocked|mutexWoken|mutexStarving) != 0 {