internal EventNotify(ISpEventSource sapiEventSource, IAsyncDispatch dispatcher, bool additionalSapiFeatures)
{
_sapiEventSourceReference = new WeakReference(sapiEventSource);
_dispatcher = dispatcher;
_additionalSapiFeatures = additionalSapiFeatures;
_notifySink = new SpNotifySink(this);
sapiEventSource.SetNotifySink(_notifySink);
}
internal EventNotify(ISpEventSource sapiEventSource, IAsyncDispatch dispatcher, bool additionalSapiFeatures)
{
// Remember event source
_sapiEventSourceReference = new WeakReference(sapiEventSource);
_dispatcher = dispatcher;
_additionalSapiFeatures = additionalSapiFeatures;
// Start listening to events from sapiEventSource.
_notifySink = new SpNotifySink(this);
sapiEventSource.SetNotifySink(_notifySink);
}
internal void Dispose()
{
lock (this)
{
if (_sapiEventSourceReference != null)
{
ISpEventSource spEventSource = (ISpEventSource)_sapiEventSourceReference.Target;
if (spEventSource != null)
{
spEventSource.SetNotifySink(null);
_notifySink = null;
}
}
_sapiEventSourceReference = null;
}
}
// Finalizer is not required since ISpEventSource and AsyncOperation both implement appropriate finalizers.
internal void Dispose()
{
lock (this)
{
// Since we are explicitly calling Dispose(), sapiEventSource (RCW) will normally be alive.
// If Dispose() is called from a finalizer this may not be the case so check for null.
if (_sapiEventSourceReference != null)
{
ISpEventSource sapiEventSource = (ISpEventSource)_sapiEventSourceReference.Target;
if (sapiEventSource != null)
{
// Stop listening to events from sapiEventSource.
sapiEventSource.SetNotifySink(null);
_notifySink = null;
}
}
_sapiEventSourceReference = null;
}
}