/// <summary>
/// Loop to receive packets. Use e
/// The method exits when readLimit is reached or when an
/// outbound flow completes. This
///
/// Throws MqttTimeoutException if keepalive period expires.
/// </summary>
/// <param name="readLimit">Read limit in milliseconds.</param>
/// <returns>Returns true if is connected, false otherwise.</returns>
public bool Loop(int readLimit)
{
if (readLimit < 0)
{
throw new ArgumentException("Poll limit should be positive");
}
// Loop shouldn't be called concurrently or recursivelly
if (Interlocked.CompareExchange(ref inLoop, 1, 0) == 1)
{
throw new InvalidProgramException("Loop is already running");
}
try {
int readThreshold = Environment.TickCount + readLimit;
int pollTime;
InterruptLoop = false;
while ((pollTime = readThreshold - Environment.TickCount) > 0 && !InterruptLoop)
{
if (Transport.IsClosed)
{
return(false);
}
else if (Transport.Poll(pollTime))
{
ReceivePacket();
}
else if (WriteWaitExpired)
{
Send(new PingreqPacket());
}
else if (ReadWaitExpired)
{
throw new MqttTimeoutException();
}
}
return(!Transport.IsClosed);
} finally {
inLoop = 0;
}
}
bool Poll(int pollTime)
{
return(Transport.Poll(Math.Min(pollTime, (int)MaxPollTime.TotalMilliseconds)));
}