//
// Return a type's transitive implemeted interface list using the runtime type system. If the underlying runtime type system does not support
// this operation, return null and TypeInfo.ImplementedInterfaces will fall back to metadata. Note that returning null is not the same thing
// as returning a 0-length enumerable.
//
public static IEnumerable <RuntimeTypeHandle> TryGetImplementedInterfaces(RuntimeTypeHandle typeHandle)
{
EETypePtr eeType = typeHandle.ToEETypePtr();
RuntimeImports.RhEETypeClassification eeTypeClassification = RuntimeImports.RhGetEETypeClassification(eeType);
if (eeTypeClassification == RuntimeImports.RhEETypeClassification.GenericTypeDefinition ||
eeTypeClassification == RuntimeImports.RhEETypeClassification.UnmanagedPointer)
{
return(null);
}
uint numInterfaces = RuntimeImports.RhGetNumInterfaces(eeType);
LowLevelList <RuntimeTypeHandle> implementedInterfaces = new LowLevelList <RuntimeTypeHandle>();
for (uint i = 0; i < numInterfaces; i++)
{
EETypePtr ifcEEType = RuntimeImports.RhGetInterface(eeType, i);
RuntimeTypeHandle ifcrth = new RuntimeTypeHandle(ifcEEType);
if (Callbacks.IsReflectionBlocked(ifcrth))
{
continue;
}
implementedInterfaces.Add(ifcrth);
}
return(implementedInterfaces.ToArray());
}
// Returns a new delegate of the specified type whose implementation is provied by the
// provided delegate.
internal static Delegate CreateObjectArrayDelegate(Type t, Func <object[], object> handler)
{
EETypePtr delegateEEType;
if (!t.TryGetEEType(out delegateEEType))
{
throw new InvalidOperationException();
}
RuntimeImports.RhEETypeClassification delegateEETypeClassification = RuntimeImports.RhGetEETypeClassification(delegateEEType);
if (!(delegateEETypeClassification == RuntimeImports.RhEETypeClassification.Regular || delegateEETypeClassification == RuntimeImports.RhEETypeClassification.Generic))
{
throw new InvalidOperationException();
}
Delegate del = (Delegate)(RuntimeImports.RhNewObject(delegateEEType));
IntPtr objArrayThunk = del.GetThunk(Delegate.ObjectArrayThunk);
if (objArrayThunk == IntPtr.Zero)
{
throw new InvalidOperationException();
}
del.m_helperObject = handler;
del.m_functionPointer = objArrayThunk;
del.m_firstParameter = del;
return(del);
}
protected const int ObjectArrayThunk = 7; // This may not exist
//
// If the thunk does not exist, the function will return IntPtr.Zero.
protected virtual IntPtr GetThunk(int whichThunk)
{
#if DEBUG
// The GetThunk function should be overriden on all delegate types, except for universal
// canonical delegates which use calling convention converter thunks to marshal arguments
// for the delegate call. If we execute this version of GetThunk, we can at least assert
// that the current delegate type is a generic type.
Debug.Assert(RuntimeImports.RhGetEETypeClassification(this.EETypePtr) == RuntimeImports.RhEETypeClassification.Generic);
#endif
return(TypeLoaderExports.GetDelegateThunk(this, whichThunk));
}
protected sealed override RuntimeType Factory(EETypePtr eeType)
{
RuntimeImports.RhEETypeClassification classification = RuntimeImports.RhGetEETypeClassification(eeType);
switch (classification)
{
case RuntimeImports.RhEETypeClassification.Regular:
return(new RuntimeEENamedNonGenericType(eeType));
case RuntimeImports.RhEETypeClassification.Array:
return(new RuntimeEEArrayType(eeType));
case RuntimeImports.RhEETypeClassification.UnmanagedPointer:
return(new RuntimeEEPointerType(eeType));
case RuntimeImports.RhEETypeClassification.GenericTypeDefinition:
return(new RuntimeEENamedGenericType(eeType));
case RuntimeImports.RhEETypeClassification.Generic:
// Reflection blocked constructed generic types simply pretend to not be generic
// This is reasonable, as the behavior of reflection blocked types is supposed
// to be that they expose the minimal information about a type that is necessary
// for users of Object.GetType to move from that type to a type that isn't
// reflection blocked. By not revealing that reflection blocked types are generic
// we are making it appear as if implementation detail types exposed to user code
// are all non-generic, which is theoretically possible, and by doing so
// we avoid (in all known circumstances) the very complicated case of representing
// the interfaces, base types, and generic parameter types of reflection blocked
// generic type definitions.
if (RuntimeAugments.Callbacks.IsReflectionBlocked(new RuntimeTypeHandle(eeType)))
{
return(new RuntimeEENamedNonGenericType(eeType));
}
if (RuntimeImports.AreTypesAssignable(eeType, typeof(MDArrayRank2).TypeHandle.ToEETypePtr()))
{
return(new RuntimeEEArrayType(eeType, rank: 2));
}
if (RuntimeImports.AreTypesAssignable(eeType, typeof(MDArrayRank3).TypeHandle.ToEETypePtr()))
{
return(new RuntimeEEArrayType(eeType, rank: 3));
}
if (RuntimeImports.AreTypesAssignable(eeType, typeof(MDArrayRank4).TypeHandle.ToEETypePtr()))
{
return(new RuntimeEEArrayType(eeType, rank: 4));
}
return(new RuntimeEEConstructedGenericType(eeType));
default:
throw new ArgumentException(SR.Arg_InvalidRuntimeTypeHandle);
}
}
//
// Return a type's base type using the runtime type system. If the underlying runtime type system does not support
// this operation, return false and TypeInfo.BaseType will fall back to metadata.
//
// Note that "default(RuntimeTypeHandle)" is a valid result that will map to a null result. (For example, System.Object has a "null" base type.)
//
public static bool TryGetBaseType(RuntimeTypeHandle typeHandle, out RuntimeTypeHandle baseTypeHandle)
{
EETypePtr eeType = typeHandle.ToEETypePtr();
RuntimeImports.RhEETypeClassification eeTypeClassification = RuntimeImports.RhGetEETypeClassification(eeType);
if (eeTypeClassification == RuntimeImports.RhEETypeClassification.GenericTypeDefinition ||
eeTypeClassification == RuntimeImports.RhEETypeClassification.UnmanagedPointer)
{
baseTypeHandle = default(RuntimeTypeHandle);
return(false);
}
baseTypeHandle = new RuntimeTypeHandle(eeType.BaseType);
return(true);
}
//
// Note: This works on both Enum's and underlying integer values.
//
//
// This returns the underlying enum values as "ulong" regardless of the actual underlying type. Signed integral
// types get sign-extended into the 64-bit value, unsigned types get zero-extended.
//
// The return value is "bool" if "value" is not an enum or an "integer type" as defined by the BCL Enum apis.
//
private static bool TryGetUnboxedValueOfEnumOrInteger(Object value, out ulong result)
{
EETypePtr eeType = value.EETypePtr;
// For now, this check is required to flush out pointers.
RuntimeImports.RhEETypeClassification classification = RuntimeImports.RhGetEETypeClassification(eeType);
if (classification != RuntimeImports.RhEETypeClassification.Regular)
{
result = 0;
return(false);
}
RuntimeImports.RhCorElementType corElementType = eeType.CorElementType;
unsafe
{
fixed(IntPtr *pEEType = &value.m_pEEType)
{
IntPtr pValue = Object.GetAddrOfPinnedObjectFromEETypeField(pEEType);
switch (corElementType)
{
case RuntimeImports.RhCorElementType.ELEMENT_TYPE_BOOLEAN:
result = (*(bool *)pValue) ? 1UL : 0UL;
return(true);
case RuntimeImports.RhCorElementType.ELEMENT_TYPE_CHAR:
result = (ulong)(long)(*(char *)pValue);
return(true);
case RuntimeImports.RhCorElementType.ELEMENT_TYPE_I1:
result = (ulong)(long)(*(sbyte *)pValue);
return(true);
case RuntimeImports.RhCorElementType.ELEMENT_TYPE_U1:
result = (ulong)(long)(*(byte *)pValue);
return(true);
case RuntimeImports.RhCorElementType.ELEMENT_TYPE_I2:
result = (ulong)(long)(*(short *)pValue);
return(true);
case RuntimeImports.RhCorElementType.ELEMENT_TYPE_U2:
result = (ulong)(long)(*(ushort *)pValue);
return(true);
case RuntimeImports.RhCorElementType.ELEMENT_TYPE_I4:
result = (ulong)(long)(*(int *)pValue);
return(true);
case RuntimeImports.RhCorElementType.ELEMENT_TYPE_U4:
result = (ulong)(long)(*(uint *)pValue);
return(true);
case RuntimeImports.RhCorElementType.ELEMENT_TYPE_I8:
result = (ulong)(long)(*(long *)pValue);
return(true);
case RuntimeImports.RhCorElementType.ELEMENT_TYPE_U8:
result = (ulong)(long)(*(ulong *)pValue);
return(true);
default:
result = 0;
return(false);
}
}
}
}
public static bool IsGenericTypeDefinition(RuntimeTypeHandle typeHandle)
{
return(RuntimeImports.RhGetEETypeClassification(CreateEETypePtr(typeHandle)) == RuntimeImports.RhEETypeClassification.GenericTypeDefinition);
}
public static bool IsUnmanagedPointerType(RuntimeTypeHandle typeHandle)
{
return(RuntimeImports.RhGetEETypeClassification(CreateEETypePtr(typeHandle)) == RuntimeImports.RhEETypeClassification.UnmanagedPointer);
}
public static bool IsArrayType(RuntimeTypeHandle typeHandle)
{
return(RuntimeImports.RhGetEETypeClassification(CreateEETypePtr(typeHandle)) == RuntimeImports.RhEETypeClassification.Array);
}
