/// <summary>
/// Begins an operation to accept a connection from a client
/// </summary>
private void StartAccept()
{
SocketAsyncEventArgs acceptEventArg;
if (_acceptPool.Count > 1)
{
try
{
acceptEventArg = _acceptPool.Pop();
}
catch
{
acceptEventArg = CreateAcceptingSocketAsyncEventArgs();
}
}
else
{
acceptEventArg = CreateAcceptingSocketAsyncEventArgs();
}
// This is a mechanism to prevent exceeding
// the max # of connections we specified. We'll do this before
// doing AcceptAsync. If maxConnections value has been reached,
// then the application will pause here until the Semaphore gets released,
// which happens in the CloseClientSocket method.
_maxConnectionsEnforcer.WaitOne();
try
{
bool runningAsync = _listenSocket.AcceptAsync(acceptEventArg);
if (!runningAsync)
{
// Accept completed synchronously (Completed callback was not called).
ProcessAccept(acceptEventArg);
}
}
catch (ObjectDisposedException err)
{
// Handle silently, the program is most likely being terminated.
// Trace just in case we get here in an unexpected way.
_trace.DisposedListen(_settings.CustomState, err);
}
}
