/NRefactory/ICSharpCode.NRefactory/Utils/CacheManager.cs

http://github.com/icsharpcode/ILSpy · C# · 59 lines · 29 code · 6 blank · 24 comment · 0 complexity · c6cd6edd60a60b524b7efdec3ea268f5 MD5 · raw file

  1. // Copyright (c) 2010-2013 AlphaSierraPapa for the SharpDevelop Team
  2. //
  3. // Permission is hereby granted, free of charge, to any person obtaining a copy of this
  4. // software and associated documentation files (the "Software"), to deal in the Software
  5. // without restriction, including without limitation the rights to use, copy, modify, merge,
  6. // publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
  7. // to whom the Software is furnished to do so, subject to the following conditions:
  8. //
  9. // The above copyright notice and this permission notice shall be included in all copies or
  10. // substantial portions of the Software.
  11. //
  12. // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
  13. // INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
  14. // PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
  15. // FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  16. // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  17. // DEALINGS IN THE SOFTWARE.
  18. using System;
  19. using System.Collections.Concurrent;
  20. using System.Collections.Generic;
  21. using System.Threading;
  22. namespace ICSharpCode.NRefactory.Utils
  23. {
  24. /// <summary>
  25. /// Allows caching values for a specific compilation.
  26. /// A CacheManager consists of a for shared instances (shared among all threads working with that resolve context).
  27. /// </summary>
  28. /// <remarks>This class is thread-safe</remarks>
  29. public sealed class CacheManager
  30. {
  31. readonly ConcurrentDictionary<object, object> sharedDict = new ConcurrentDictionary<object, object>(ReferenceComparer.Instance);
  32. // There used to be a thread-local dictionary here, but I removed it as it was causing memory
  33. // leaks in some use cases.
  34. public object GetShared(object key)
  35. {
  36. object value;
  37. sharedDict.TryGetValue(key, out value);
  38. return value;
  39. }
  40. public object GetOrAddShared(object key, Func<object, object> valueFactory)
  41. {
  42. return sharedDict.GetOrAdd(key, valueFactory);
  43. }
  44. public object GetOrAddShared(object key, object value)
  45. {
  46. return sharedDict.GetOrAdd(key, value);
  47. }
  48. public void SetShared(object key, object value)
  49. {
  50. sharedDict[key] = value;
  51. }
  52. }
  53. }