// Begins tracking a socket, calling Abort() if there was an earlier call to AbortAll()
public void Add(IAsyncAbortableWebSocket webSocket)
{
int activeSocketCount;
bool shouldAbort;
// keep the lock for as short a period as possible
lock (_activeSockets) {
_activeSockets.Add(webSocket);
activeSocketCount = _activeSockets.Count;
shouldAbort = _aborted;
}
// perform any additional operations outside the lock
_perfCounters.SetCounter(AppPerfCounter.REQUESTS_EXECUTING_WEBSOCKETS, activeSocketCount);
if (shouldAbort)
{
webSocket.AbortAsync(); // don't care about the result of the abort at the present time
}
}