public DerivedObject(TestComWrappers comWrappersInstance)
{
IntPtr innerInstance = WeakReferenceNative.CreateAggregatedWeakReferenceObject(
comWrappersInstance.GetOrCreateComInterfaceForObject(this, CreateComInterfaceFlags.None));
inner = new WeakReferenceableWrapper(innerInstance, comWrappersInstance.Registration, releaseInFinalizer: false);
comWrappersInstance.GetOrRegisterObjectForComInstance(innerInstance, CreateObjectFlags.Aggregation, this);
}
static void ValidatePrecreatedExternalWrapper()
{
Console.WriteLine($"Running {nameof(ValidatePrecreatedExternalWrapper)}...");
var cw = new TestComWrappers();
// Get an object from a tracker runtime.
IntPtr trackerObjRaw = MockReferenceTrackerRuntime.CreateTrackerObject();
// Manually create a wrapper
var iid = typeof(ITrackerObject).GUID;
IntPtr iTestComObject;
int hr = Marshal.QueryInterface(trackerObjRaw, ref iid, out iTestComObject);
Assert.AreEqual(hr, 0);
var nativeWrapper = new ITrackerObjectWrapper(iTestComObject);
// Register wrapper, but supply the wrapper.
var nativeWrapper2 = (ITrackerObjectWrapper)cw.GetOrRegisterObjectForComInstance(trackerObjRaw, CreateObjectFlags.TrackerObject, nativeWrapper);
Assert.AreEqual(nativeWrapper, nativeWrapper2);
// Ownership has been transferred to the wrapper.
Marshal.Release(trackerObjRaw);
// Validate reuse of a wrapper fails.
IntPtr trackerObjRaw2 = MockReferenceTrackerRuntime.CreateTrackerObject();
Assert.Throws <NotSupportedException>(
() =>
{
cw.GetOrRegisterObjectForComInstance(trackerObjRaw2, CreateObjectFlags.None, nativeWrapper2);
});
Marshal.Release(trackerObjRaw2);
// Validate passing null wrapper fails.
Assert.Throws <ArgumentNullException>(
() =>
{
cw.GetOrRegisterObjectForComInstance(trackerObjRaw, CreateObjectFlags.None, null);
});
}
static void ValidateSuppliedInnerNotAggregation()
{
Console.WriteLine($"Running {nameof(ValidateSuppliedInnerNotAggregation)}...");
var cw = new TestComWrappers();
// Attempt to register a non-zero instance with a non-zero inner value without
// indicating the scenario is aggregaion.
var invalidInstance = new IntPtr(1);
var invalidInner = new IntPtr(2);
Assert.Throws <InvalidOperationException>(
() =>
{
cw.GetOrRegisterObjectForComInstance(invalidInstance, CreateObjectFlags.None, new object(), invalidInner);
});
}
