| // Copyright (c) 2021, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| // |
| // SharedObjects=ffi_test_functions |
| |
| import 'dart:ffi'; |
| |
| import "package:expect/expect.dart"; |
| |
| import 'dylib_utils.dart'; |
| |
| // Reuse compound definitions. |
| import 'function_structs_by_value_generated_compounds.dart'; |
| |
| void main() { |
| testSizeOfC(); |
| testSizeOfDart(); |
| } |
| |
| final ffiTestFunctions = dlopenPlatformSpecific("ffi_test_functions"); |
| |
| final sizeOfStruct3BytesPackedInt = ffiTestFunctions |
| .lookupFunction<Uint64 Function(), int Function()>( |
| "SizeOfStruct3BytesPackedInt", |
| ); |
| |
| void testSizeOfC() { |
| Expect.equals(3, sizeOfStruct3BytesPackedInt()); |
| } |
| |
| void testSizeOfDart() { |
| // No packing needed to get to 3 bytes. |
| Expect.equals(3, sizeOf<Struct3BytesHomogeneousUint8>()); |
| |
| // Contents 3 bytes, but alignment forces it to be 4 bytes. |
| Expect.equals(4, sizeOf<Struct3BytesInt2ByteAligned>()); |
| |
| // Alignment gets the same content back to 3 bytes. |
| Expect.equals(3, sizeOf<Struct3BytesPackedInt>()); |
| } |