public static void Subscribe(IDisposable instance, Type interfaceCOM)
{
IntPtr pUnk = Marshal.GetComInterfaceForObject(instance, interfaceCOM);
IntPtr vtable = Marshal.ReadIntPtr(pUnk);
COMDisposable item = (COMDisposable)ITEMS[vtable];
if (item == null)
{
//gets the the Release function
IntPtr releaseOriPtr = Marshal.ReadIntPtr(vtable, RELEASE_PTR_OFFSET);
ReleaseDelegate releaseOri = (ReleaseDelegate)Marshal.GetDelegateForFunctionPointer(
releaseOriPtr, typeof(ReleaseDelegate));
//saves the original function and reference count
item = new COMDisposable();
item.ReleaseOri = releaseOri;
item.RefCountStart = releaseOri(pUnk);
ITEMS.Add(vtable, item);
//overrides the Release function
Marshal.WriteIntPtr(vtable, RELEASE_PTR_OFFSET, ReleaseNewPtr);
}
else
{
item.ReleaseOri(pUnk);
}
}
private static int Release(IntPtr pUnk)
{
IntPtr vtable = Marshal.ReadIntPtr(pUnk);
COMDisposable item = (COMDisposable)ITEMS[vtable];
int refCount = item.ReleaseOri(pUnk);
if (refCount < item.RefCountStart)
{
IDisposable obj = (IDisposable)Marshal.GetObjectForIUnknown(pUnk);
item.ReleaseOri(pUnk);
obj.Dispose();
}
return(refCount);
}
public static void Subscribe(IDisposable instance, Type interfaceCOM) {
IntPtr pUnk = Marshal.GetComInterfaceForObject(instance, interfaceCOM);
IntPtr vtable = Marshal.ReadIntPtr(pUnk);
COMDisposable item = (COMDisposable)ITEMS[vtable];
if (item == null) {
//gets the the Release function
IntPtr releaseOriPtr = Marshal.ReadIntPtr(vtable, RELEASE_PTR_OFFSET);
ReleaseDelegate releaseOri = (ReleaseDelegate)Marshal.GetDelegateForFunctionPointer(
releaseOriPtr, typeof(ReleaseDelegate));
//saves the original function and reference count
item = new COMDisposable();
item.ReleaseOri = releaseOri;
item.RefCountStart = releaseOri(pUnk);
ITEMS.Add(vtable, item);
//overrides the Release function
Marshal.WriteIntPtr(vtable, RELEASE_PTR_OFFSET, ReleaseNewPtr);
} else {
item.ReleaseOri(pUnk);
}
}
