// ----------------------------------------------------------------------- // Copyright (c) Microsoft Corporation. All rights reserved. // ----------------------------------------------------------------------- using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace Microsoft.ComponentModel.Composition.Hosting { class ConcurrentCache<TKey, TValue> { IDictionary<TKey, TValue> _cache = new Dictionary<TKey, TValue>(); object _synchRoot = new object(); public TValue GetOrCreate(TKey key, Func<TValue> valueCreator) { lock (_synchRoot) { TValue value; if (!_cache.TryGetValue(key, out value)) _cache[key] = value = valueCreator(); return value; } } public IEnumerable<TValue> Values { get { lock (_synchRoot) return _cache.Values.ToArray(); } } } }
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