Use go.uber.org/atomic
Atomic operations with the sync/atomic package operate on the raw types
(int32, int64, etc.) so it is easy to forget to use the atomic operation to
read or modify the variables.
go.uber.org/atomic adds type safety to these operations by hiding the
underlying type. Additionally, it includes a convenient atomic.Bool type.
| Bad | Good |
|---|---|
| ```go type foo struct { running int32 // atomic } func (f* foo) start() { if atomic.SwapInt32(&f.running, 1) == 1 { // already running… return } // start the Foo } func (f *foo) isRunning() bool { return f.running == 1 // race! } ``` | ```go type foo struct { running atomic.Bool } func (f *foo) start() { if f.running.Swap(true) { // already running… return } // start the Foo } func (f *foo) isRunning() bool { return f.running.Load() } ``` |