func sync/atomic.SwapInt32

3 uses

	sync/atomic (current package)
		doc.go#L71: func SwapInt32(addr *int32, new int32) (old int32)
		type.go#L86: func (x *Int32) Swap(new int32) (old int32) { return SwapInt32(&x.v, new) }

	os/exec
		exec.go#L645: 	if atomic.SwapInt32(&c.startCalled, 1) != 0 {