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14e4a52657
https://dart-review.googlesource.com/c/sdk/+/257925 added a new entry in the middle of the `Dart_CObject_Type` enum, which changed the value of the entries below. However, this enum is part of `dart_api_dl.h` and versioned by `dart_version.h`. New entries to `Dart_CObject_Type` should be added at the end of the enum to avoid making breaking changes to the type. TEST=tests/ffi/vmspecific_handle_dynamically_linked_test.dart Bug: https://github.com/dart-lang/sdk/issues/51459 Change-Id: I367b54f62e59ddf925e255bb56c0f8660be7c227 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/284161 Reviewed-by: Martin Kustermann <kustermann@google.com> Commit-Queue: Daco Harkes <dacoharkes@google.com>
68 lines
2 KiB
Dart
68 lines
2 KiB
Dart
// Copyright (c) 2020, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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import 'dart:ffi';
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import 'package:expect/expect.dart';
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import 'dylib_utils.dart';
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void main() {
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print('start main');
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doDynamicLinking();
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int counter = 0;
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void closure() {
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counter++;
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}
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// C holds on to this closure through a `Dart_PersistentHandle`.
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registerClosureCallback(closure);
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// Some time later this closure can be invoked.
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invokeClosureCallback();
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Expect.equals(1, counter);
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// When C is done it needs to stop holding on to the closure such that the
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// Dart GC can collect the closure.
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releaseClosureCallback();
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print('end main');
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}
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final testLibrary = dlopenPlatformSpecific("ffi_test_functions");
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final registerClosureCallback =
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testLibrary.lookupFunction<Void Function(Handle), void Function(Object)>(
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"RegisterClosureCallback");
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final invokeClosureCallback = testLibrary
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.lookupFunction<Void Function(), void Function()>("InvokeClosureCallback");
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final releaseClosureCallback = testLibrary
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.lookupFunction<Void Function(), void Function()>("ReleaseClosureCallback");
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void doClosureCallback(Object callback) {
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final callback_as_function = callback as void Function();
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callback_as_function();
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}
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final closureCallbackPointer =
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Pointer.fromFunction<Void Function(Handle)>(doClosureCallback);
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void doDynamicLinking() {
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Expect.isTrue(NativeApi.majorVersion == 2);
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Expect.isTrue(NativeApi.minorVersion >= 2);
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final initializeApi = testLibrary.lookupFunction<
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IntPtr Function(Pointer<Void>),
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int Function(Pointer<Void>)>("InitDartApiDL");
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Expect.isTrue(initializeApi(NativeApi.initializeApiDLData) == 0);
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final registerClosureCallback = testLibrary.lookupFunction<
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Void Function(Pointer),
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void Function(Pointer)>("RegisterClosureCallbackFP");
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registerClosureCallback(closureCallbackPointer);
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}
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