Function notifyQueryCancel

server/worker.go:185–190

notifyQueryCancel delivers one query-cancel request, coalescing bursts: if a cancel is already pending (buffer full), the new one is dropped — the pending token will cancel the same in-flight query.

(ch chan struct{})

// notifyQueryCancel delivers one query-cancel request, coalescing bursts: if
// a cancel is already pending (buffer full), the new one is dropped — the
// pending token will cancel the same in-flight query.
func notifyQueryCancel(ch chan struct{}) {
	select {
	case ch <- struct{}{}:
	default:
	}
}

// runChildWorker handles a single client connection in a child process.