public CallbackNativeType(NativeTypeDesc desc)
: base(desc)
{
Debug.Assert(typeof(Delegate).IsAssignableFrom(desc.Type));
UnmanagedType[] allowed_unmanaged_types;
if (desc.IsStructField)
{
// fields of delegate type can only marshal as function pointers
allowed_unmanaged_types = MarshalType.DelegField;
}
else
{
// parameters of delegate type
allowed_unmanaged_types = (desc.IsComInterop ? MarshalType.DelegC : MarshalType.DelegP);
}
switch (ValidateUnmanagedType(desc, allowed_unmanaged_types))
{
case UnmanagedType.FunctionPtr:
{
if (!desc.IsCallbackParam)
{
// the "number one" mistake when marshaling delegate to function ptr
Log.Add(Errors.INFO_BewarePrematureDelegateRelease);
}
this.typeDefinition = FunctionPtrDefinition.Get(desc);
break;
}
case UnmanagedType.Interface:
{
this.name = DelegateInterfaceDefinition.InterfaceName;
this.nameModifier = StructModifier;
this.indirections++;
Log.Add(Errors.INFO_SeeMscorlibTlbForInterface, this.name);
this.typeDefinition = DelegateInterfaceDefinition.Get(desc);
break;
}
default:
{
Debug.Fail(null);
goto case UnmanagedType.FunctionPtr;
}
}
}
public ForwardDeclaration(FunctionPtrDefinition definition)
{
if (definition == null) throw new ArgumentNullException(nameof(definition));
this.definition = definition;
}
public ForwardDeclaration(FunctionPtrDefinition definition)
{
Debug.Assert(definition != null);
this.definition = definition;
}