| using System; |
| using System.Threading; |
| |
| namespace Lucene.Net.Support.Threading |
| { |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| /// <summary> |
| /// Extensions to help obtain/release from a ReaderWriterSlimLock. |
| /// Taken from: |
| /// http://stackoverflow.com/questions/170028/how-would-you-simplify-entering-and-exiting-a-readerwriterlock |
| /// |
| /// LUCENENET specific |
| /// </summary> |
| internal static class ReaderWriterLockSlimExtensions |
| { |
| private sealed class ReadLockToken : IDisposable |
| { |
| private ReaderWriterLockSlim _readerWriterLockSlim; |
| |
| public ReadLockToken(ReaderWriterLockSlim sync) |
| { |
| _readerWriterLockSlim = sync; |
| sync.EnterReadLock(); |
| } |
| |
| public void Dispose() |
| { |
| if (_readerWriterLockSlim != null) |
| { |
| _readerWriterLockSlim.ExitReadLock(); |
| _readerWriterLockSlim = null; |
| } |
| } |
| } |
| |
| private sealed class WriteLockToken : IDisposable |
| { |
| private ReaderWriterLockSlim _readerWriterLockSlim; |
| |
| public WriteLockToken(ReaderWriterLockSlim sync) |
| { |
| _readerWriterLockSlim = sync; |
| sync.EnterWriteLock(); |
| } |
| |
| public void Dispose() |
| { |
| if (_readerWriterLockSlim != null) |
| { |
| _readerWriterLockSlim.ExitWriteLock(); |
| _readerWriterLockSlim = null; |
| } |
| } |
| } |
| |
| public static IDisposable Read(this ReaderWriterLockSlim obj) |
| { |
| return new ReadLockToken(obj); |
| } |
| |
| public static IDisposable Write(this ReaderWriterLockSlim obj) |
| { |
| return new WriteLockToken(obj); |
| } |
| } |
| } |