// sendRoutine polls for packets to send from channels.
func (c *MConnection) sendRoutine() {
defer c._recover()
FOR_LOOP:
for {
var n int64
var err error
select {
case <-c.flushTimer.Ch:
// NOTE: flushTimer.Set() must be called every time
// something is written to .bufWriter.
c.flush()
case <-c.chStatsTimer.Ch:
for _, channel := range c.channels {
channel.updateStats()
}
case <-c.pingTimer.Ch:
log.Debug("Send Ping")
binary.WriteByte(packetTypePing, c.bufWriter, &n, &err)
c.sendMonitor.Update(int(n))
c.flush()
case <-c.pong:
log.Debug("Send Pong")
binary.WriteByte(packetTypePong, c.bufWriter, &n, &err)
c.sendMonitor.Update(int(n))
c.flush()
case <-c.quit:
break FOR_LOOP
case <-c.send:
// Send some msgPackets
eof := c.sendSomeMsgPackets()
if !eof {
// Keep sendRoutine awake.
select {
case c.send <- struct{}{}:
default:
}
}
}
if atomic.LoadUint32(&c.stopped) == 1 {
break FOR_LOOP
}
if err != nil {
log.Warn("Connection failed @ sendRoutine", "connection", c, "error", err)
c.stopForError(err)
break FOR_LOOP
}
}
// Cleanup
}
// Writes next msgPacket to w.
// Not goroutine-safe
func (ch *Channel) writeMsgPacketTo(w io.Writer) (n int64, err error) {
packet := ch.nextMsgPacket()
binary.WriteByte(packetTypeMsg, w, &n, &err)
binary.WriteBinary(packet, w, &n, &err)
if err != nil {
ch.recentlySent += n
}
return
}