internal static MediaContext From(Dispatcher dispatcher)
{
MediaContext context = dispatcher._mediaContext;
if (context == null)
{
Type type = typeof(GlobalLock);
lock (type)
{
context = dispatcher._mediaContext;
if (context == null)
{
context = new MediaContext();
dispatcher._mediaContext = context;
}
}
}
return(context);
}
/// <summary>
/// Gets the MediaContext from the context passed in as argument.
/// </summary>
internal static MediaContext From(Dispatcher dispatcher)
{
Debug.Assert(dispatcher != null, "Dispatcher required");
var cm = dispatcher._mediaContext;
if (cm == null)
{
lock (typeof(GlobalLock)) {
cm = dispatcher._mediaContext;
if (cm == null)
{
cm = new MediaContext();
dispatcher._mediaContext = cm;
}
}
}
return(cm);
}
internal void BeginInvokeOnRender(DispatcherOperationCallback callback, object arg)
{
if (this._invokeOnRenderCallbacks == null)
{
MediaContext context = this;
lock (context)
{
if (this._invokeOnRenderCallbacks == null)
{
this._invokeOnRenderCallbacks = new ArrayList();
}
}
}
ArrayList list = this._invokeOnRenderCallbacks;
lock (list)
{
this._invokeOnRenderCallbacks.Add(new InvokeOnRenderCallback(callback, arg));
}
this.PostRender();
}