Zachary Anderson
678cb048ed
Fixes #26665 R=sgjesse@google.com Review URL: https://codereview.chromium.org/2050413002 .
51 lines
1.3 KiB
Dart
51 lines
1.3 KiB
Dart
// Copyright (c) 2016, 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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// Script used by the file_lock_test.dart test.
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import "dart:async";
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import "dart:io";
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Future<int> testLockWholeFile(File file, int len) async {
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var raf = await file.open(mode: APPEND);
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await raf.setPosition(0);
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int nextToWrite = 1;
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while (nextToWrite <= len) {
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await raf.lock(FileLock.BLOCKING_EXCLUSIVE, 0, len);
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int at;
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int p;
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while (true) {
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p = await raf.position();
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at = await raf.readByte();
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if (at == 0 || at == -1) break;
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nextToWrite++;
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}
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await raf.setPosition(p);
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await raf.writeByte(nextToWrite);
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await raf.flush();
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nextToWrite++;
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await raf.unlock(0, len);
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}
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await raf.lock(FileLock.BLOCKING_EXCLUSIVE, 0, len);
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await raf.setPosition(0);
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for (int i = 1; i <= len; i++) {
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if ((await raf.readByte()) != i) {
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await raf.unlock(0, len);
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await raf.close();
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return 1;
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}
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}
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await raf.unlock(0, len);
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await raf.close();
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return 0;
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}
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main(List<String> args) async {
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File file = new File(args[0]);
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int len = int.parse(args[1]);
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exit(await testLockWholeFile(file, len));
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}
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