83 lines
2.4 KiB
C#
83 lines
2.4 KiB
C#
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//
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// CacheEntryCollection.cs
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//
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// Authors:
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// Marcos Henrih (marcos.henrich@xamarin.com)
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//
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// Copyright 2014 Xamarin, Inc (http://www.xamarin.com)
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// 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
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// 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, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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using System.Collections;
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using System.Collections.Generic;
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using System.Timers;
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namespace System.Runtime.Caching
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{
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interface ICacheEntryHelper : IComparer<MemoryCacheEntry>
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{
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DateTime GetDateTime (MemoryCacheEntry entry);
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}
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class CacheEntryCollection
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{
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protected MemoryCacheStore store;
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private ICacheEntryHelper helper;
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private SortedSet <MemoryCacheEntry> entries;
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protected CacheEntryCollection (MemoryCacheStore store, ICacheEntryHelper helper)
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{
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this.store = store;
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this.helper = helper;
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entries = new SortedSet <MemoryCacheEntry> (helper);
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}
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protected void Add (MemoryCacheEntry entry)
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{
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entries.Add (entry);
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}
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protected void Remove (MemoryCacheEntry entry)
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{
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entries.Remove (entry);
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}
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protected int FlushItems (DateTime limit, CacheEntryRemovedReason reason, bool blockInsert, int count = int.MaxValue)
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{
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var flushedItems = 0;
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if (blockInsert)
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store.BlockInsert ();
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foreach (var entry in entries) {
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if (helper.GetDateTime (entry) > limit || flushedItems >= count)
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break;
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flushedItems++;
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}
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for (var f = 0; f < flushedItems; f++)
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store.Remove (entries.Min, null, reason);
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if (blockInsert)
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store.UnblockInsert ();
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return flushedItems;
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}
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}
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}
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