// Returning error here is too noisy.
		return nil
	case c.outQueue <- msg:
		return nil
	}
}

// queueMsg queues a message, with an optional payload.
// sender should not reference msg.Payload
func (c *Connection) queueMsg(msg message, payload sender) error {
	// Add baseflags.
	msg.Flags.Set(c.baseFlags)
	// This cannot encode subroute.
	msg.Flags.Clear(FlagSubroute)
	if payload != nil {

	if !isZeroTime(modtime) {
		w.Header().Set("Last-Modified", modtime.UTC().Format(TimeFormat))
	}
}

func writeNotModified(w ResponseWriter) {
	// RFC 7232 section 4.1:
	// a sender SHOULD NOT generate representation metadata other than the
	// above listed fields unless said metadata exists for the purpose of
	// guiding cache updates (e.g., Last-Modified might be useful if the

	}

	// Sender sending more than they'd declared?
	if st.declBodyBytes != -1 && st.bodyBytes+int64(len(data)) > st.declBodyBytes {
		if !sc.inflow.take(f.Length) {
			return sc.countError("data_flow", http2streamError(id, http2ErrCodeFlowControl))
		}
		sc.sendWindowUpdate(nil, int(f.Length)) // conn-level

		if err != nil {
			return nil, nil, nil, err
		}
	}

	return hello, keyShareKeys, ech, nil
}

type echContext struct {
	config          *echConfig
	hpkeContext     *hpke.Sender
	encapsulatedKey []byte
	innerHello      *clientHelloMsg
	innerTranscript hash.Hash
	kdfID           uint16
	aeadID          uint16
	echRejected     bool
}

	httpOpts := &httpListenerOpts{
		// Set useRemoteAddress to true for sidecar outbound listeners so that it picks up the localhost address of the sender,
		// which is an internal address, so that trusted headers are not sanitized. This helps to retain the timeout headers
		// such as "x-envoy-upstream-rq-timeout-ms" set by the calling application.

	writeSuccessResponseXML(w, encodedSuccessResponse)
}

// ListBucketsHandler - GET Service.
// -----------
// This implementation of the GET operation returns a list of all buckets
// owned by the authenticated sender of the request.
func (api objectAPIHandlers) ListBucketsHandler(w http.ResponseWriter, r *http.Request) {
	ctx := newContext(r, w, "ListBuckets")

	defer logger.AuditLog(ctx, w, r, mustGetClaimsFromToken(r))

	ch := make(chan int)
	go func(ch chan int) {
		ch <- 5
		LockOSThread()
	}(ch)

	g1 := getg()

	// Block on a receive. This is likely to get us a thread
	// switch. If we yield to the sender goroutine, it will
	// lock the thread, forcing us to resume on a different
	// thread.
	<-ch

	g2 := getg()
	if g1 != g2 {
		panic("g1 != g2")
	}

				// should probably start a goroutine to read from req. This best
				// effort select existed before the change to check 'deleted'.
				// But if we know for sure it wasn't deleted and a sender is
				// outstanding, we should probably block on req (in a new
				// goroutine) to get the connection back.
				select {
				default:
				case ret, ok := <-req:
					if ok && ret.conn != nil {

make(chan int, 100)
</pre>

<p>
The capacity, in number of elements, sets the size of the buffer in the channel.
If the capacity is zero or absent, the channel is unbuffered and communication
succeeds only when both a sender and receiver are ready. Otherwise, the channel
is buffered and communication succeeds without blocking if the buffer
is not full (sends) or not empty (receives).
A <code>nil</code> channel is never ready for communication.