/// <summary>
/// Creates a JavaScript value from an host object if the it does not already exist
/// </summary>
/// <param name="obj">Instance of host type</param>
/// <returns>JavaScript value created from an host object</returns>
public JsValue GetOrCreateScriptObject(object obj)
{
if (!_embeddedObjectStorageInitialized)
{
lock (_embeddedObjectStorageInitializationSynchronizer)
{
if (!_embeddedObjectStorageInitialized)
{
_lazyEmbeddedObjects = new ConcurrentDictionary <EmbeddedObjectKey, Lazy <EmbeddedObject> >();
_embeddedObjectFinalizeCallback = EmbeddedObjectFinalizeCallback;
_embeddedObjectStorageInitialized = true;
}
}
}
var embeddedObjectKey = new EmbeddedObjectKey(obj);
EmbeddedObject embeddedObject = _lazyEmbeddedObjects.GetOrAdd(
embeddedObjectKey,
key => new Lazy <EmbeddedObject>(() => CreateEmbeddedObjectOrFunction(obj))
).Value;
return(embeddedObject.ScriptValue);
}
private void EmbeddedObjectFinalizeCallback(IntPtr ptr)
{
if (ptr == IntPtr.Zero)
{
return;
}
GCHandle objHandle = GCHandle.FromIntPtr(ptr);
object obj = objHandle.Target;
var lazyEmbeddedObjects = _lazyEmbeddedObjects;
if (obj != null && lazyEmbeddedObjects != null)
{
var embeddedObjectKey = new EmbeddedObjectKey(obj);
Lazy <EmbeddedObject> lazyEmbeddedObject;
if (lazyEmbeddedObjects.TryRemove(embeddedObjectKey, out lazyEmbeddedObject))
{
lazyEmbeddedObject.Value?.Dispose();
}
}
objHandle.Free();
}
