public override unsafe int TryAs <U>(Guid iid, out ObjectReference <U> objRef)
{
objRef = null;
int hr = VftblIUnknown.QueryInterface(ThisPtr, ref iid, out IntPtr thatPtr);
if (hr >= 0)
{
if (IsAggregated)
{
Marshal.Release(thatPtr);
}
AddRefFromTrackerSource();
using (var contextCallbackReference = ObjectReference <ABI.WinRT.Interop.IContextCallback.Vftbl> .FromAbi(_contextCallbackPtr))
{
objRef = new ObjectReferenceWithContext <U>(thatPtr, contextCallbackReference.GetRef())
{
IsAggregated = IsAggregated,
PreventReleaseOnDispose = IsAggregated,
ReferenceTrackerPtr = ReferenceTrackerPtr
};
}
}
return(hr);
}
protected virtual unsafe void AddRef(bool refFromTrackerSource)
{
VftblIUnknown.AddRef(ThisPtr);
if (refFromTrackerSource)
{
AddRefFromTrackerSource();
}
}
public virtual unsafe int TryAs <T>(Guid iid, out ObjectReference <T> objRef)
{
objRef = null;
ThrowIfDisposed();
int hr = VftblIUnknown.QueryInterface(ThisPtr, ref iid, out IntPtr thatPtr);
if (hr >= 0)
{
objRef = ObjectReference <T> .Attach(ref thatPtr);
}
return(hr);
}
// Used only as part of the GetInterface implementation where the
// result is an reference passed across the ABI and doesn't need to
// be tracked as an internal reference. This is separate to handle
// tear off aggregate scenario where releasing an reference can end up
// deleting the tear off interface.
public virtual unsafe int TryAs(Guid iid, out IntPtr ppv)
{
ppv = IntPtr.Zero;
ThrowIfDisposed();
int hr = VftblIUnknown.QueryInterface(ThisPtr, ref iid, out IntPtr thatPtr);
if (hr >= 0)
{
ppv = thatPtr;
}
return(hr);
}
public override unsafe int TryAs <U>(Guid iid, out ObjectReference <U> objRef)
{
objRef = null;
int hr = VftblIUnknown.QueryInterface(ThisPtr, ref iid, out IntPtr thatPtr);
if (hr >= 0)
{
using (var contextCallbackReference = ObjectReference <ABI.WinRT.Interop.IContextCallback.Vftbl> .FromAbi(_contextCallbackPtr))
{
objRef = new ObjectReferenceWithContext <U>(thatPtr, contextCallbackReference.GetRef());
}
}
return(hr);
}
public virtual unsafe int TryAs <T>(Guid iid, out ObjectReference <T> objRef)
{
objRef = null;
ThrowIfDisposed();
int hr = VftblIUnknown.QueryInterface(ThisPtr, ref iid, out IntPtr thatPtr);
if (hr >= 0)
{
if (IsAggregated)
{
Marshal.Release(thatPtr);
}
AddRefFromTrackerSource();
objRef = ObjectReference <T> .Attach(ref thatPtr);
objRef.IsAggregated = IsAggregated;
objRef.PreventReleaseOnDispose = IsAggregated;
objRef.ReferenceTrackerPtr = ReferenceTrackerPtr;
}
return(hr);
}
public override unsafe int TryAs <U>(Guid iid, out ObjectReference <U> objRef)
{
objRef = null;
int hr = VftblIUnknown.QueryInterface(ThisPtr, ref iid, out IntPtr thatPtr);
if (hr >= 0)
{
if (IsAggregated)
{
Marshal.Release(thatPtr);
}
AddRefFromTrackerSource();
objRef = new ObjectReferenceWithContext <U>(thatPtr, Context.GetContextCallback(), Context.GetContextToken(), _agileReference, iid)
{
IsAggregated = IsAggregated,
PreventReleaseOnDispose = IsAggregated,
ReferenceTrackerPtr = ReferenceTrackerPtr
};
}
return(hr);
}
public unsafe TInterface AsInterface <TInterface>()
{
if (typeof(TInterface).GetCustomAttribute(typeof(System.Runtime.InteropServices.ComImportAttribute)) is object)
{
Guid iid = typeof(TInterface).GUID;
Marshal.ThrowExceptionForHR(VftblIUnknown.QueryInterface(ThisPtr, ref iid, out IntPtr comPtr));
try
{
return((TInterface)Marshal.GetObjectForIUnknown(comPtr));
}
finally
{
var vftblPtr = Unsafe.AsRef <WinRT.VftblPtr>(comPtr.ToPointer());
var vftblIUnknown = Marshal.PtrToStructure <WinRT.Interop.IUnknownVftbl>(vftblPtr.Vftbl);
vftblIUnknown.Release(comPtr);
}
}
#if NETSTANDARD2_0
return((TInterface)typeof(TInterface).GetHelperType().GetConstructor(new[] { typeof(IObjectReference) }).Invoke(new object[] { this }));
#else
return((TInterface)(object)new WinRT.IInspectable(this));
#endif
}
public ObjectReference <T> As <T>(Guid iid)
{
ThrowIfDisposed();
Marshal.ThrowExceptionForHR(VftblIUnknown.QueryInterface(ThisPtr, ref iid, out IntPtr thatPtr));
return(ObjectReference <T> .Attach(ref thatPtr));
}
protected virtual void AddRef()
{
VftblIUnknown.AddRef(ThisPtr);
}
protected virtual unsafe void Release()
{
ReleaseFromTrackerSource();
VftblIUnknown.Release(ThisPtr);
}
