public virtual void InitNonPrimaryBase(ICppObject baseInDerived, ICppObject derived, Type baseType)
{
int offset;
var baseTypeInfo = GetCastInfo(derived.GetType(), baseType, out offset);
Marshal.WriteIntPtr(baseInDerived.Native.Native, baseTypeInfo.GCHandleOffset, CppInstancePtr.MakeGCHandle(baseInDerived));
}
public virtual CppInstancePtr Cast(ICppObject instance, Type targetType)
{
int offset;
var baseTypeInfo = GetCastInfo(instance.GetType(), targetType, out offset);
var result = new CppInstancePtr(instance.Native, offset);
if (offset > 0 && instance.Native.IsManagedAlloc && baseTypeInfo.HasVTable)
{
// we might need to paste the managed base-in-derived vtptr here --also inits native_vtptr
baseTypeInfo.VTable.InitInstance(ref result);
}
return(result);
}
public virtual TTarget Cast <TTarget> (ICppObject instance) where TTarget : class
{
TTarget result;
var ptr = Cast(instance, typeof(TTarget));
// Check for existing instance based on vtable ptr
result = CppInstancePtr.ToManaged <TTarget> (ptr.Native);
// Create a new wrapper if necessary
if (result == null)
{
result = Activator.CreateInstance(typeof(TTarget), ptr) as TTarget;
}
return(result);
}
public virtual CppInstancePtr Cast(ICppObject instance, Type targetType)
{
int offset;
var baseTypeInfo = GetCastInfo(instance.GetType(), targetType, out offset);
var result = new CppInstancePtr(instance.Native, offset);
if (offset > 0 && instance.Native.IsManagedAlloc && baseTypeInfo.HasVTable)
{
// we might need to paste the managed base-in-derived vtptr here --also inits native_vtptr
baseTypeInfo.VTable.InitInstanceOffset(ref result, false, 0);
// Make sure we update the vtable location in the original instance as well
instance.Native.SetNativeBaseVTable(baseTypeInfo.WrapperType, result.NativeVTable);
}
return(result);
}
