static WeakReference <ITrackerObjectWrapper> CreateAndRegisterWrapper(ComWrappers cw, IntPtr trackerObjRaw)
{
// Manually create a wrapper
var iid = typeof(ITrackerObject).GUID;
IntPtr iTestComObject;
int hr = Marshal.QueryInterface(trackerObjRaw, ref iid, out iTestComObject);
Assert.Equal(0, hr);
var nativeWrapper = new ITrackerObjectWrapper(iTestComObject);
nativeWrapper = (ITrackerObjectWrapper)cw.GetOrRegisterObjectForComInstance(trackerObjRaw, CreateObjectFlags.None, nativeWrapper);
// Set this on the return instead of during creation since the returned wrapper may be the one from
// the internal cache and not the one passed in above.
nativeWrapper.ReregisterForFinalize = true;
return(new WeakReference <ITrackerObjectWrapper>(nativeWrapper, trackResurrection: true));
}
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);
});
}
