private void RemoveSignalHandler(SignalMatchRule rule, SignalHandler dlg)
{
lock (_gate)
{
if (_signalHandlers?.ContainsKey(rule) == true)
{
_signalHandlers[rule] = (SignalHandler)Delegate.Remove(_signalHandlers[rule], dlg);
if (_signalHandlers[rule] == null)
{
_signalHandlers.Remove(rule);
if (ConnectionInfo.RemoteIsBus)
{
CallRemoveMatchRule(rule.ToString());
}
}
}
}
}
public async Task <IDisposable> WatchSignalAsync(ObjectPath path, string @interface, string signalName, SignalHandler handler)
{
SignalMatchRule rule = new SignalMatchRule()
{
Interface = @interface,
Member = signalName,
Path = path
};
Task task = null;
lock (_gate)
{
ThrowIfNotConnected();
if (_signalHandlers.ContainsKey(rule))
{
_signalHandlers[rule] = (SignalHandler)Delegate.Combine(_signalHandlers[rule], handler);
task = Task.CompletedTask;
}
else
{
_signalHandlers[rule] = handler;
if (ConnectionInfo.RemoteIsBus)
{
task = CallAddMatchRuleAsync(rule.ToString());
}
}
}
SignalHandlerRegistration registration = new SignalHandlerRegistration(this, rule, handler);
try
{
if (task != null)
{
await task;
}
}
catch
{
registration.Dispose();
throw;
}
return(registration);
}
Task RemoveSignalHandler(SignalMatchRule rule, SignalHandler dlg)
{
lock (_gate)
{
if (_signalHandlers.ContainsKey(rule))
{
var sh = _signalHandlers[rule];
_signalHandlers[rule] = (SignalHandler)Delegate.Remove(sh, dlg);
if (_signalHandlers[rule] == null)
{
_signalHandlers.Remove(rule);
if (RemoteIsBus == true)
{
return(DBus.RemoveMatch(rule.ToString()));
}
}
}
}
return(Task.CompletedTask);
}