internal static unsafe IntPtr ObjectToComInterfaceInternal(Object obj, RuntimeTypeHandle typeHnd)
{
if (obj == null)
{
return(default(IntPtr));
}
#if ENABLE_WINRT
//
// Try boxing if this is a WinRT object
//
if (typeHnd.Equals(InternalTypes.IInspectable))
{
object unboxed = McgMarshal.BoxIfBoxable(obj);
//
// Marshal ReferenceImpl<T> to WinRT as IInspectable
//
if (unboxed != null)
{
obj = unboxed;
}
else
{
//
// Anything that can be casted to object[] will be boxed as object[]
//
object[] objArray = obj as object[];
if (objArray != null)
{
unboxed = McgMarshal.BoxIfBoxable(obj, typeof(object[]).TypeHandle);
if (unboxed != null)
{
obj = unboxed;
}
}
}
}
#endif //ENABLE_WINRT
//
// If this is a RCW, and the RCW is not a base class (managed class deriving from RCW class),
// QI on the RCW
//
__ComObject comObject = obj as __ComObject;
if (comObject != null && !comObject.ExtendsComObject)
{
IntPtr pComPtr = comObject.QueryInterface_NoAddRef_Internal(typeHnd, /* cacheOnly= */ false, /* throwOnQueryInterfaceFailure= */ false);
if (pComPtr == default(IntPtr))
{
return(default(IntPtr));
}
McgMarshal.ComAddRef(pComPtr);
GC.KeepAlive(comObject); // make sure we don't collect the object before adding a refcount.
return(pComPtr);
}
//
// Otherwise, go down the CCW code path
//
return(ManagedObjectToComInterface(obj, typeHnd));
}