80 lines
2.0 KiB
C#
80 lines
2.0 KiB
C#
//
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// System.Threading.LockQueue
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//
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// Author(s):
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// Jackson Harper (jackson@ximian.com)
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//
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// (C) 2004 Novell, Inc (http://www.novell.com)
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//
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//
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// Copyright (C) 2004 Novell, Inc (http://www.novell.com)
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System;
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namespace System.Threading {
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// Used for queueing on a reader writer lock
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internal class LockQueue {
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private ReaderWriterLock rwlock;
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private int lockCount = 0;
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public LockQueue (ReaderWriterLock rwlock)
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{
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this.rwlock = rwlock;
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}
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public bool Wait (int timeout)
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{
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bool _lock = false;
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try {
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lock (this) {
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lockCount++;
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Monitor.Exit (rwlock);
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_lock = true;
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return Monitor.Wait (this, timeout);
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}
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} finally {
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if (_lock) {
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Monitor.Enter (rwlock);
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lockCount--;
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}
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}
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}
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public bool IsEmpty
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{
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get { lock (this) return (lockCount == 0); }
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}
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public void Pulse ()
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{
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lock (this) Monitor.Pulse (this);
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}
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}
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}
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