m.disconnect("handler blocked", true)
	}
}

func (m *muxServer) unblockSend(seq uint32) {
	if !m.checkSeq(seq) {
		return
	}
	m.recvMu.Lock()
	defer m.recvMu.Unlock()
	if m.outBlock == nil {
		// Closed
		return
	}
	select {
	case m.outBlock <- struct{}{}:
	default:
		gridLogIf(m.ctx, errors.New("output unblocked overflow"))
	}
}

func (m *muxServer) ping(seq uint32) pongMsg {

	for i := 0; i < available; i++ {
		m.outBlock <- struct{}{}
	}
	m.acked = true
}

func (m *muxClient) unblockSend(seq uint32) {
	if !m.checkSeq(seq) {
		return
	}
	select {
	case m.outBlock <- struct{}{}:
	default:
		gridLogIf(m.ctx, errors.New("output unblocked overflow"))
	}
}

func (m *muxClient) pong(msg pongMsg) {
	if msg.NotFound || msg.Err != nil {

		}
		// We can expect to receive unblocks for closed muxes
		return
	}
	v.unblockSend(m.Seq)
}

func (c *Connection) handleUnblockSrvMux(m message) {
	if m.Payload != nil {
		PutByteBuffer(m.Payload)
	}
	m.Payload = nil
	if v, ok := c.inStream.Load(m.MuxID); ok {
		v.unblockSend(m.Seq)
		return
	}
	// We can expect to receive unblocks for closed muxes
	if debugPrint {

	EvGoSleep           = 19 // goroutine calls Sleep [timestamp, stack]
	EvGoBlock           = 20 // goroutine blocks [timestamp, stack]
	EvGoUnblock         = 21 // goroutine is unblocked [timestamp, goroutine id, seq, stack]
	EvGoBlockSend       = 22 // goroutine blocks on chan send [timestamp, stack]
	EvGoBlockRecv       = 23 // goroutine blocks on chan recv [timestamp, stack]

	b10.Event("ProcStatus", trace.ProcID(0), go122.ProcRunning)
	b10.Event("GoStatus", trace.GoID(1), trace.ThreadID(0), go122.GoRunning)
	b10.Event("GoStop", "whatever", testgen.NoStack)

	// The running goroutine gets unblocked.
	b11 := g1.Batch(trace.ThreadID(1), 0)
	b11.Event("ProcStatus", trace.ProcID(1), go122.ProcRunning)
	b11.Event("GoStart", trace.GoID(1), testgen.Seq(1))
	b11.Event("GoStop", "whatever", testgen.NoStack)

signal, while Ignore will cause the system to ignore the signal
entirely.

If the program is started with a non-empty signal mask, some signals
will be explicitly unblocked as described above. If Notify is called
for a blocked signal, it will be unblocked. If, later, Reset is
called for that signal, or Stop is called on all channels passed to
Notify for that signal, the signal will once again be blocked.

# SIGPIPE

	// OpMuxServerMsg contains a message to a server Mux
	OpMuxServerMsg

	// OpUnblockSrvMux contains a message that a server mux is unblocked with one.
	// Only Stateful streams has flow control.
	OpUnblockSrvMux

	// OpUnblockClMux contains a message that a client mux is unblocked with one.
	// Only Stateful streams has flow control.
	OpUnblockClMux

	// OpAckMux acknowledges a mux was created.
	OpAckMux

        public boolean isImmediatelyAfter(ClockTickImpl other) {
            return number == other.number + 1;
        }
    }

    private enum State {
        Idle, Blocking, Blocked, Unblocking, Unblocked, Failed
    }

    private class SyncPoint {
        private final Lock lock = new ReentrantLock();
        private final Condition condition = lock.newCondition();
        private State state = State.Idle;

		if from == trace.GoUndetermined {
			// Back-date the event to the start of the trace.
			start = ctx.startTime
		}
		gs.start(start, goID, ctx)
	}

	if from == trace.GoWaiting {
		// Goroutine unblocked.
		gs.unblock(ev.Time(), ev.Stack(), ev.Goroutine(), ctx)
	}
	if from == trace.GoNotExist && to == trace.GoRunnable {
		// Goroutine was created.
		gs.created(ev.Time(), ev.Goroutine(), ev.Stack())
	}

 *
 * Be careful when using values like [DisconnectAtEnd], [ShutdownInputAtEnd]
 * and [ShutdownOutputAtEnd] that close a socket after a response, and where there are
 * follow-up requests. The client is unblocked and free to continue as soon as it has received the
 * entire response body. If and when the client makes a subsequent request using a pooled socket the