public static ComEventSinksContainer FromRuntimeCallableWrapper(object rcw, bool createIfNotFound)
{
// !!! Marshal.Get/SetComObjectData has a LinkDemand for UnmanagedCode which will turn into
// a full demand. We need to avoid this by making this method SecurityCritical
object data = Marshal.GetComObjectData(rcw, _ComObjectEventSinksKey);
if (data != null || createIfNotFound == false)
{
return((ComEventSinksContainer)data);
}
lock (_ComObjectEventSinksKey) {
data = Marshal.GetComObjectData(rcw, _ComObjectEventSinksKey);
if (data != null)
{
return((ComEventSinksContainer)data);
}
ComEventSinksContainer comEventSinks = new ComEventSinksContainer();
if (!Marshal.SetComObjectData(rcw, _ComObjectEventSinksKey, comEventSinks))
{
throw Error.SetComObjectDataFailed();
}
return(comEventSinks);
}
}
public static ComEventSink FromRuntimeCallableWrapper(object rcw, Guid sourceIid, bool createIfNotFound)
{
List <ComEventSink> comEventSinks = ComEventSinksContainer.FromRuntimeCallableWrapper(rcw, createIfNotFound);
if (comEventSinks == null)
{
return(null);
}
ComEventSink comEventSink = null;
lock (comEventSinks) {
foreach (ComEventSink sink in comEventSinks)
{
if (sink._sourceIid == sourceIid)
{
comEventSink = sink;
break;
}
if (sink._sourceIid == Guid.Empty)
{
// we found a ComEventSink object that
// was previously disposed. Now we will reuse it.
sink.Initialize(rcw, sourceIid);
comEventSink = sink;
}
}
if (comEventSink == null && createIfNotFound)
{
comEventSink = new ComEventSink(rcw, sourceIid);
comEventSinks.Add(comEventSink);
}
}
return(comEventSink);
}