Some of our code uses something like:
type Dummy struct {
closed int64
}
func(d *Dummy) IsClosed() bool {
return atomic.LoadInt64(&d.closed) == 1
}
func(d *Dummy) Close() error {
if !atomic.CompareAndSwapInt64(&d.closed, 0, 1) {
return fmt.Errorf("already closed")
}
// other logic
return nil
}
IsClosed feels racy to me, is it better to use atomic.CompareAndSwap(&d.closed,
1, 1) for IsClosed?
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