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Viewing changes to external/nrefactory/ICSharpCode.NRefactory/Utils/CacheManager.cs

  • Committer: Package Import Robot
  • Author(s): Jo Shields
  • Date: 2013-05-12 09:46:03 UTC
  • mto: This revision was merged to the branch mainline in revision 29.
  • Revision ID: package-import@ubuntu.com-20130512094603-mad323bzcxvmcam0
Tags: upstream-4.0.5+dfsg
Import upstream version 4.0.5+dfsg

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external/nrefactory/ICSharpCode.NRefactory/Utils/CacheManager.cs
 
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// Copyright (c) 2010-2013 AlphaSierraPapa for the SharpDevelop Team
 
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// 
 
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// Permission is hereby granted, free of charge, to any person obtaining a copy of this
 
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// software and associated documentation files (the "Software"), to deal in the Software
 
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// without restriction, including without limitation the rights to use, copy, modify, merge,
 
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// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
 
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// to whom the Software is furnished to do so, subject to the following conditions:
 
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// 
 
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// The above copyright notice and this permission notice shall be included in all copies or
 
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// substantial portions of the Software.
 
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// 
 
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
 
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// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
 
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// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
 
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// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 
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// DEALINGS IN THE SOFTWARE.
 
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using System;
 
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using System.Collections.Concurrent;
 
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using System.Collections.Generic;
 
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using System.Threading;
 
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namespace ICSharpCode.NRefactory.Utils
 
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{
 
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        /// <summary>
 
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        /// Allows caching values for a specific compilation.
 
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        /// A CacheManager consists of a for shared instances (shared among all threads working with that resolve context).
 
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        /// </summary>
 
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        /// <remarks>This class is thread-safe</remarks>
 
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        public sealed class CacheManager
 
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        {
 
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                readonly ConcurrentDictionary<object, object> sharedDict = new ConcurrentDictionary<object, object>(ReferenceComparer.Instance);
 
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                // There used to be a thread-local dictionary here, but I removed it as it was causing memory
 
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                // leaks in some use cases.
 
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                public object GetShared(object key)
 
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                {
 
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                        object value;
 
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                        sharedDict.TryGetValue(key, out value);
 
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                        return value;
 
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                }
 
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                public object GetOrAddShared(object key, Func<object, object> valueFactory)
 
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                {
 
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                        return sharedDict.GetOrAdd(key, valueFactory);
 
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                }
 
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                public object GetOrAddShared(object key, object value)
 
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                {
 
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                        return sharedDict.GetOrAdd(key, value);
 
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                }
 
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                public void SetShared(object key, object value)
 
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                {
 
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                        sharedDict[key] = value;
 
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                }
 
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        }
 
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}