Function mergeContexts

bridge.go:355–365

mergeContexts merges two contexts together, so that if either is canceled the returned context is canceled. The context values will only be used from the first context.

(base, other context.Context)

// the returned context is canceled. The context values will only be used from
// the first context.
func mergeContexts(base, other context.Context) context.Context {
	ctx, cancel := context.WithCancel(base)
	go func() {
		defer cancel()
		select {
		case <-base.Done():
		case <-other.Done():
		}
	}()
	return ctx
}