flying Software Circus: Intro to FastAPI' - author: Sebastián Ramírez (tiangolo) author_link: https://twitter.com/tiangolo link: https://www.youtube.com/watch?v=z9K5pwb0rt8 title: 'PyConBY 2020: Serve ML models easily with FastAPI' - author: Chris Withers author_link: https://twitter.com/chriswithers13 link: https://www.youtube.com/watch?v=3DLwPcrE5mA title: 'PyCon UK 2019: FastAPI from the ground up'...

		}
		defer conn.Close()
		for i := 0; i < 10; i++ {
			fmt.Fprintf(conn, "%d\n", i)
			time.Sleep(time.Millisecond)
		}
	}()

	wg.Wait()
	if v := netpollWaiters.Load(); v != 0 {
		log.Fatalf("current waiters %v", v)
	}

	fmt.Println("OK")

	// indexedTrigger is used for optimizing amount of watchers that needs to process
	// an incoming event.
	indexedTrigger *indexedTriggerFunc
	// watchers is mapping from the value of trigger function that a
	// watcher is interested into the watchers
	watcherIdx int
	watchers   indexedWatchers

	// Defines a time budget that can be spend on waiting for not-ready watchers
	// while dispatching event before shutting them down.

		// Therefore, we only filter this field when it is set.
		if len(ctx.TlsParams.CipherSuites) > 0 {
			ciphers := []string{}
			for _, cipher := range ctx.TlsParams.CipherSuites {
				if _, ok := fipsCipherIndex[cipher]; ok {
					ciphers = append(ciphers, cipher)
				}
			}
			ctx.TlsParams.CipherSuites = ciphers
		}
		// Default (unset) is P-256

	w := waiter{n: n, ready: ready}
	elem := s.waiters.PushBack(w)
	s.mu.Unlock()

	select {
	case <-done:
		s.mu.Lock()
		select {
		case <-ready:
			// Acquired the semaphore after we were canceled.
			// Pretend we didn't and put the tokens back.
			s.cur -= n
			s.notifyWaiters()
		default:
			isFront := s.waiters.Front() == elem
			s.waiters.Remove(elem)

					s.next.parent = s
				}
				// Add t first in s's wait list.
				s.waitlink = t
				s.waittail = t.waittail
				if s.waittail == nil {
					s.waittail = t
				}
				s.waiters = t.waiters
				if s.waiters+1 != 0 {
					s.waiters++
				}
				t.parent = nil
				t.prev = nil
				t.next = nil
				t.waittail = nil
			} else {
				// Add s to end of t's wait list.
				if t.waittail == nil {

     *
     * @throws WatchingNotSupportedException when the native watchers can't be updated.
     */
    void registerWatchableHierarchy(File watchableHierarchy, SnapshotHierarchy root);

    /**
     * Updates the watchers after changes to the root.
     *
     * @throws WatchingNotSupportedException when the native watchers can't be updated.
     */

		ctx.CommonTlsContext.AlpnProtocols = util.ALPNHttp
	}
	ciphers := SupportedCiphers
	if mc != nil && mc.MeshMTLS != nil && mc.MeshMTLS.CipherSuites != nil {
		ciphers = mc.MeshMTLS.CipherSuites
	}
	// Set Minimum TLS version to match the default client version and allowed strong cipher suites for sidecars.
	ctx.CommonTlsContext.TlsParams = &tls.TlsParameters{
		CipherSuites:              ciphers,
		TlsMinimumProtocolVersion: minTLSVersion,

	}
	// This goroutine has set counter to 0 when waiters > 0.
	// Now there can't be concurrent mutations of state:
	// - Adds must not happen concurrently with Wait,
	// - Wait does not increment waiters if it sees counter == 0.
	// Still do a cheap sanity check to detect WaitGroup misuse.
	if wg.state.Load() != state {
		panic("sync: WaitGroup misuse: Add called concurrently with Wait")
	}
	// Reset waiters count to 0.
	wg.state.Store(0)

    /**
     * Returns 1 for non-hierarchical watchers, and 0 for hierarchical watchers.
     *
     * For use in interaction tests, when an interaction only happens for non-hierarchical watchers.
     * E.g.:
     * ifNonHierarchical * watcher.startWatching(_)
     */
    abstract int getIfNonHierarchical()

    /**
     * Returns 1 for hierarchical watchers, and 0 for non-hierarchical watchers.
     *