Oleh Prypin
5a1ef6089c
This reverts commit f706ff4ee2.
Reason for revert: b/321667799 - package:win32 uses this method - https://github.com/dart-windows/win32/blob/a78ff108fbf54927b0334c1bab8f15526c24cbf8/lib/src/com/iapplicationactivationmanager.dart#L46
Original change's description:
> [ffi]: Remove pointer elementAt method.
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> Closes #54250
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> TEST=test/ffi
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> R=dacoharkes@google.com
> Change-Id: I0e88adfcfe3caef0ad3bb6814ad8f27dce5dc7f4
> CoreLibraryReviewExempt: FFI only
> Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/346380
> Reviewed-by: Daco Harkes <dacoharkes@google.com>
> Commit-Queue: Martin Kustermann <kustermann@google.com>
> Reviewed-by: Martin Kustermann <kustermann@google.com>
> Auto-Submit: Shikhar <shikharish05@gmail.com>
Change-Id: I1b7a48d14e9b85676a27f76a926e21cac9c76c85
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/347600
Reviewed-by: Martin Kustermann <kustermann@google.com>
Reviewed-by: Daco Harkes <dacoharkes@google.com>
Commit-Queue: Daco Harkes <dacoharkes@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 Arena.
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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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