internal static unsafe void PtrToStructureImpl(IntPtr ptr, object structure)
{
RuntimeTypeHandle structureTypeHandle = structure.GetType().TypeHandle;
// Boxed struct start at offset 1 (EEType* at offset 0) while class start at offset 0
int offset = structureTypeHandle.IsValueType() ? 1 : 0;
IntPtr unmarshalStub;
if (structureTypeHandle.IsBlittable())
{
if (!RuntimeAugments.InteropCallbacks.TryGetStructUnmarshalStub(structureTypeHandle, out unmarshalStub))
{
unmarshalStub = IntPtr.Zero;
}
}
else
{
unmarshalStub = RuntimeAugments.InteropCallbacks.GetStructUnmarshalStub(structureTypeHandle);
}
if (unmarshalStub != IntPtr.Zero)
{
InteropExtensions.PinObjectAndCall(structure,
unboxedStructPtr =>
{
CalliIntrinsics.Call <int>(
unmarshalStub,
(void *)ptr, // unsafe (no need to adjust as it is always struct)
((void *)((IntPtr *)unboxedStructPtr + offset)) // safe (need to adjust offset as it could be class)
);
});
}
else
{
int structSize = Marshal.SizeOf(structure);
InteropExtensions.PinObjectAndCall(structure,
unboxedStructPtr =>
{
InteropExtensions.Memcpy(
(IntPtr)((IntPtr *)unboxedStructPtr + offset), // safe (need to adjust offset as it could be class)
ptr, // unsafe (no need to adjust as it is always struct)
structSize
);
});
}
}
internal static void GenericStructureToPtr <T>(ref T structure, byte *ptr, uint sizeofT) where T : struct
{
RuntimeTypeHandle structureTypeHandle = structure.GetType().TypeHandle;
if (!structureTypeHandle.IsBlittable())
{
throw new ArgumentException(SR.Argument_NeedStructWithNoRefs);
}
InteropExtensions.PinObjectAndCall((Object)structure,
unboxedStructPtr =>
{
InteropExtensions.Memcpy(
(IntPtr)ptr, // unsafe (no need to adjust as it is always struct)
(IntPtr)((IntPtr *)unboxedStructPtr + 1), // safe (need to adjust offset as boxed structure start at offset 1)
(int)sizeofT
);
});
}
internal static void GenericPtrToStructure <T>(byte *ptr, out T structure, uint sizeofT) where T : struct
{
RuntimeTypeHandle structureTypeHandle = typeof(T).TypeHandle;
if (!structureTypeHandle.IsBlittable())
{
throw new ArgumentException(SR.Argument_NeedStructWithNoRefs);
}
Object boxedStruct = new T();
InteropExtensions.PinObjectAndCall(boxedStruct,
unboxedStructPtr =>
{
InteropExtensions.Memcpy(
(IntPtr)((IntPtr *)unboxedStructPtr + 1), // safe (need to adjust offset as boxed structure start at offset 1)
(IntPtr)ptr, // unsafe (no need to adjust as it is always struct)
(int)sizeofT
);
});
structure = (T)boxedStruct;
}
public static unsafe void StructureToPtr(object structure, IntPtr ptr, bool fDeleteOld)
{
if (structure == null)
{
throw new ArgumentNullException(nameof(structure));
}
if (ptr == IntPtr.Zero)
{
throw new ArgumentNullException(nameof(ptr));
}
if (fDeleteOld)
{
DestroyStructure(ptr, structure.GetType());
}
RuntimeTypeHandle structureTypeHandle = structure.GetType().TypeHandle;
if (structureTypeHandle.IsGenericType() || structureTypeHandle.IsGenericTypeDefinition())
{
throw new ArgumentException(nameof(structure), SR.Argument_NeedNonGenericObject);
}
// Boxed struct start at offset 1 (EEType* at offset 0) while class start at offset 0
int offset = structureTypeHandle.IsValueType() ? 1 : 0;
IntPtr marshalStub;
if (structureTypeHandle.IsBlittable())
{
if (!RuntimeAugments.InteropCallbacks.TryGetStructMarshalStub(structureTypeHandle, out marshalStub))
{
marshalStub = IntPtr.Zero;
}
}
else
{
marshalStub = RuntimeAugments.InteropCallbacks.GetStructMarshalStub(structureTypeHandle);
}
if (marshalStub != IntPtr.Zero)
{
InteropExtensions.PinObjectAndCall(structure,
unboxedStructPtr =>
{
CalliIntrinsics.Call <int>(
marshalStub,
((void *)((IntPtr *)unboxedStructPtr + offset)), // safe (need to adjust offset as it could be class)
(void *)ptr // unsafe (no need to adjust as it is always struct)
);
});
}
else
{
int structSize = Marshal.SizeOf(structure);
InteropExtensions.PinObjectAndCall(structure,
unboxedStructPtr =>
{
InteropExtensions.Memcpy(
ptr, // unsafe (no need to adjust as it is always struct)
(IntPtr)((IntPtr *)unboxedStructPtr + offset), // safe (need to adjust offset as it could be class)
structSize
);
});
}
}
