| // Copyright (c) 2019, 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. |
| // |
| // Helpers for tests which trigger GC in delicate places. |
| |
| // @dart = 2.9 |
| |
| import 'dart:ffi'; |
| |
| import 'dylib_utils.dart'; |
| |
| typedef NativeNullaryOp = Void Function(); |
| typedef NullaryOpVoid = void Function(); |
| |
| typedef NativeUnaryOp = Void Function(IntPtr); |
| typedef UnaryOpVoid = void Function(int); |
| |
| final DynamicLibrary ffiTestFunctions = |
| dlopenPlatformSpecific("ffi_test_functions"); |
| |
| final triggerGc = ffiTestFunctions |
| .lookupFunction<NativeNullaryOp, NullaryOpVoid>("TriggerGC"); |
| |
| final collectOnNthAllocation = ffiTestFunctions |
| .lookupFunction<NativeUnaryOp, UnaryOpVoid>("CollectOnNthAllocation"); |
| |
| extension PointerOffsetBy<T extends NativeType> on Pointer<T> { |
| Pointer<T> offsetBy(int bytes) => Pointer.fromAddress(address + bytes); |
| } |