dart-sdk/tests/ffi/allocator_test.dart
Daco Harkes 4e2343c290 [vm/ffi] Introduce Allocator API
Introduces the Allocator API in `dart:ffi`.

This CL does not yet roll `package:ffi` to use `Allocator`, because that
breaks the checked in Dart in Fluter in g3. Instead, this coppies
`_MallocAllocator` from `package:ffi` into the ffi tests for testing.

This CL does not yet migrate off `allocate` and `free` in the SDK. That
is done in a dependent CL.

Issue: https://github.com/dart-lang/sdk/issues/44621
Issue: https://github.com/dart-lang/sdk/issues/38721

TEST=tests/ffi/allocator_test.dart
TEST=tests/ffi/calloc_test.dart
TEST=tests/ffi/vmspecific_static_checks_test.dart

Change-Id: I173e213a750b8b3f594bb8d4fc72575f2b6b91f7
Cq-Include-Trybots: luci.dart.try:vm-precomp-ffi-qemu-linux-release-arm-try,analyzer-analysis-server-linux-try,analyzer-linux-release-try,analyzer-nnbd-linux-release-try,front-end-linux-release-x64-try,front-end-nnbd-linux-release-x64-try,benchmark-linux-try,dart-sdk-linux-try,pkg-linux-release-try,vm-ffi-android-release-arm-try,vm-ffi-android-release-arm64-try,vm-kernel-nnbd-win-debug-x64-try,vm-kernel-win-debug-x64-try
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/177705
Reviewed-by: Clement Skau <cskau@google.com>
2021-01-13 17:04:08 +00:00

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Dart

// 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.
// Tests that we can implement the Allocator interface.
import 'dart:ffi';
class MyAllocator implements Allocator {
const MyAllocator();
@override
Pointer<T> allocate<T extends NativeType>(int numBytes, {int? alignment}) {
throw "Not implemented";
}
void free(Pointer pointer) {}
}
const myAllocator = MyAllocator();
void main() {
print(myAllocator);
}