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https://github.com/dart-lang/sdk
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b101a7d002
Change-Id: Ib33169c3e0ffc870915c189404074a1dea472546 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/196548 Reviewed-by: Bob Nystrom <rnystrom@google.com> Commit-Queue: Leaf Petersen <leafp@google.com>
40 lines
1.1 KiB
Dart
40 lines
1.1 KiB
Dart
// Copyright (c) 2021, 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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// @dart = 2.9
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// Regression test for https://github.com/flutter/flutter/issues/79441.
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import 'dart:ffi';
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// FFI signature
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typedef _dart_memset = void Function(Pointer<Uint8>, int, int);
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typedef _c_memset = Void Function(Pointer<Uint8>, Int32, IntPtr);
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_dart_memset fbMemset;
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void _fallbackMemset(Pointer<Uint8> ptr, int byte, int size) {
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final bytes = ptr.cast<Uint8>();
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for (var i = 0; i < size; i++) {
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bytes[i] = byte;
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}
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}
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void main() {
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try {
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fbMemset = DynamicLibrary.process()
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.lookupFunction<_c_memset, _dart_memset>('memset');
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} catch (_) {
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// This works:
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// fbMemset = _fallbackMemset;
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// This doesn't: /aot/precompiler.cc: 2761: error: unreachable code
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fbMemset = (Pointer<Uint8> ptr, int byte, int size) {
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final bytes = ptr.cast<Uint8>();
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for (var i = 0; i < size; i++) {
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bytes[i] = byte;
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}
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};
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}
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}
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