From de0e81996d63d8a8b7f92d835d2bbdeaf5cccae0 Mon Sep 17 00:00:00 2001 From: Aidan Skinner Date: Thu, 3 Dec 2009 23:55:48 +0000 Subject: Fix eol style property git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@886998 13f79535-47bb-0310-9956-ffa450edef68 --- .../Collections/ConsumerProducerQueue.cs | 226 ++++++++++----------- 1 file changed, 113 insertions(+), 113 deletions(-) (limited to 'qpid/dotnet/Qpid.Common/Collections') diff --git a/qpid/dotnet/Qpid.Common/Collections/ConsumerProducerQueue.cs b/qpid/dotnet/Qpid.Common/Collections/ConsumerProducerQueue.cs index ea4526faaf..131f316da6 100644 --- a/qpid/dotnet/Qpid.Common/Collections/ConsumerProducerQueue.cs +++ b/qpid/dotnet/Qpid.Common/Collections/ConsumerProducerQueue.cs @@ -1,113 +1,113 @@ -/* - * - * 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. - * - */ -using System; -using System.Collections; -using System.Threading; - - -namespace Apache.Qpid.Collections -{ - /// - /// Simple FIFO queue to support multi-threaded consumer - /// and producers. It supports timeouts in dequeue operations. - /// - public sealed class ConsumerProducerQueue - { - private Queue _queue = new Queue(); - private WaitSemaphore _semaphore = new WaitSemaphore(); - - /// - /// Put an item into the tail of the queue - /// - /// - public void Enqueue(object item) - { - lock ( _queue.SyncRoot ) - { - _queue.Enqueue(item); - _semaphore.Increment(); - } - } - - /// - /// Wait indefinitely for an item to be available - /// on the queue. - /// - /// The object at the head of the queue - public object Dequeue() - { - return Dequeue(Timeout.Infinite); - } - - /// - /// Wait up to the number of milliseconds specified - /// for an item to be available on the queue - /// - /// Number of milliseconds to wait - /// The object at the head of the queue, or null - /// if the timeout expires - public object Dequeue(long timeout) - { - if ( _semaphore.Decrement(timeout) ) - { - lock ( _queue.SyncRoot ) - { - return _queue.Dequeue(); - } - } - return null; - } - - #region Simple Semaphore - // - // Simple Semaphore - // - - class WaitSemaphore - { - private int _count; - private AutoResetEvent _event = new AutoResetEvent(false); - - public void Increment() - { - Interlocked.Increment(ref _count); - _event.Set(); - } - - public bool Decrement(long timeout) - { - if ( timeout > int.MaxValue ) - throw new ArgumentOutOfRangeException("timeout", timeout, "Must be <= Int32.MaxValue"); - - int millis = (int) (timeout & 0x7FFFFFFF); - if ( Interlocked.Decrement(ref _count) > 0 ) - { - // there are messages in queue, so no need to wait - return true; - } else - { - return _event.WaitOne(millis, false); - } - } - } - #endregion // Simple Semaphore - } -} +/* + * + * 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. + * + */ +using System; +using System.Collections; +using System.Threading; + + +namespace Apache.Qpid.Collections +{ + /// + /// Simple FIFO queue to support multi-threaded consumer + /// and producers. It supports timeouts in dequeue operations. + /// + public sealed class ConsumerProducerQueue + { + private Queue _queue = new Queue(); + private WaitSemaphore _semaphore = new WaitSemaphore(); + + /// + /// Put an item into the tail of the queue + /// + /// + public void Enqueue(object item) + { + lock ( _queue.SyncRoot ) + { + _queue.Enqueue(item); + _semaphore.Increment(); + } + } + + /// + /// Wait indefinitely for an item to be available + /// on the queue. + /// + /// The object at the head of the queue + public object Dequeue() + { + return Dequeue(Timeout.Infinite); + } + + /// + /// Wait up to the number of milliseconds specified + /// for an item to be available on the queue + /// + /// Number of milliseconds to wait + /// The object at the head of the queue, or null + /// if the timeout expires + public object Dequeue(long timeout) + { + if ( _semaphore.Decrement(timeout) ) + { + lock ( _queue.SyncRoot ) + { + return _queue.Dequeue(); + } + } + return null; + } + + #region Simple Semaphore + // + // Simple Semaphore + // + + class WaitSemaphore + { + private int _count; + private AutoResetEvent _event = new AutoResetEvent(false); + + public void Increment() + { + Interlocked.Increment(ref _count); + _event.Set(); + } + + public bool Decrement(long timeout) + { + if ( timeout > int.MaxValue ) + throw new ArgumentOutOfRangeException("timeout", timeout, "Must be <= Int32.MaxValue"); + + int millis = (int) (timeout & 0x7FFFFFFF); + if ( Interlocked.Decrement(ref _count) > 0 ) + { + // there are messages in queue, so no need to wait + return true; + } else + { + return _event.WaitOne(millis, false); + } + } + } + #endregion // Simple Semaphore + } +} -- cgit v1.2.1