diff options
| author | Aidan Skinner <aidan@apache.org> | 2009-12-03 23:55:48 +0000 |
|---|---|---|
| committer | Aidan Skinner <aidan@apache.org> | 2009-12-03 23:55:48 +0000 |
| commit | de0e81996d63d8a8b7f92d835d2bbdeaf5cccae0 (patch) | |
| tree | 8dbde527e8f656849ed83981359c8dcd2512395c /qpid/dotnet/Qpid.Common/Collections | |
| parent | e769aed97fa119033e38d829be25135a4ea08a52 (diff) | |
| download | qpid-python-de0e81996d63d8a8b7f92d835d2bbdeaf5cccae0.tar.gz | |
Fix eol style property
git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@886998 13f79535-47bb-0310-9956-ffa450edef68
Diffstat (limited to 'qpid/dotnet/Qpid.Common/Collections')
| -rw-r--r-- | qpid/dotnet/Qpid.Common/Collections/ConsumerProducerQueue.cs | 226 |
1 files changed, 113 insertions, 113 deletions
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
-{
- /// <summary>
- /// Simple FIFO queue to support multi-threaded consumer
- /// and producers. It supports timeouts in dequeue operations.
- /// </summary>
- public sealed class ConsumerProducerQueue
- {
- private Queue _queue = new Queue();
- private WaitSemaphore _semaphore = new WaitSemaphore();
-
- /// <summary>
- /// Put an item into the tail of the queue
- /// </summary>
- /// <param name="item"></param>
- public void Enqueue(object item)
- {
- lock ( _queue.SyncRoot )
- {
- _queue.Enqueue(item);
- _semaphore.Increment();
- }
- }
-
- /// <summary>
- /// Wait indefinitely for an item to be available
- /// on the queue.
- /// </summary>
- /// <returns>The object at the head of the queue</returns>
- public object Dequeue()
- {
- return Dequeue(Timeout.Infinite);
- }
-
- /// <summary>
- /// Wait up to the number of milliseconds specified
- /// for an item to be available on the queue
- /// </summary>
- /// <param name="timeout">Number of milliseconds to wait</param>
- /// <returns>The object at the head of the queue, or null
- /// if the timeout expires</returns>
- 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 +{ + /// <summary> + /// Simple FIFO queue to support multi-threaded consumer + /// and producers. It supports timeouts in dequeue operations. + /// </summary> + public sealed class ConsumerProducerQueue + { + private Queue _queue = new Queue(); + private WaitSemaphore _semaphore = new WaitSemaphore(); + + /// <summary> + /// Put an item into the tail of the queue + /// </summary> + /// <param name="item"></param> + public void Enqueue(object item) + { + lock ( _queue.SyncRoot ) + { + _queue.Enqueue(item); + _semaphore.Increment(); + } + } + + /// <summary> + /// Wait indefinitely for an item to be available + /// on the queue. + /// </summary> + /// <returns>The object at the head of the queue</returns> + public object Dequeue() + { + return Dequeue(Timeout.Infinite); + } + + /// <summary> + /// Wait up to the number of milliseconds specified + /// for an item to be available on the queue + /// </summary> + /// <param name="timeout">Number of milliseconds to wait</param> + /// <returns>The object at the head of the queue, or null + /// if the timeout expires</returns> + 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 + } +} |
