Daco Harkes
a45276ab91
This can only be landed when `Allocator`, `Opaque`, and `AllocatorAlloc` have rolled into Flutter/engine, that into Flutter/flutter, and into g3. Deletes all the copies of `_CallocAllocator` and uses the one from `package:ffi` instead. Bug: https://github.com/dart-lang/sdk/issues/44622 Bug: https://github.com/dart-lang/sdk/issues/43974 Bug: https://github.com/dart-lang/sdk/issues/44621 Bug: https://github.com/dart-lang/sdk/issues/38721 Change-Id: I486034b379b5a63cad4aefd503ccd0f2ce5dd45e Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/180188 Commit-Queue: Daco Harkes <dacoharkes@google.com> Reviewed-by: Aske Simon Christensen <askesc@google.com>
38 lines
1.1 KiB
Dart
38 lines
1.1 KiB
Dart
// Copyright (c) 2019, 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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//
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// Sample illustrating manual resource management, not advised.
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import 'dart:ffi';
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import 'package:expect/expect.dart';
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import 'package:ffi/ffi.dart';
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import 'utf8_helpers.dart';
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import '../dylib_utils.dart';
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main() {
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final ffiTestDynamicLibrary =
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dlopenPlatformSpecific("ffi_test_dynamic_library");
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final memMove = ffiTestDynamicLibrary.lookupFunction<
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Void Function(Pointer<Void>, Pointer<Void>, IntPtr),
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void Function(Pointer<Void>, Pointer<Void>, int)>("MemMove");
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// To ensure resources are freed, call free manually.
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//
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// For automatic management use a Pool.
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final p = calloc<Int64>(2);
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p[0] = 24;
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memMove(p.elementAt(1).cast<Void>(), p.cast<Void>(), sizeOf<Int64>());
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print(p[1]);
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Expect.equals(24, p[1]);
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calloc.free(p);
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// Using Strings.
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final p2 = "Hello world!".toUtf8(calloc);
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print(p2.contents());
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calloc.free(p2);
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}
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