2 // CacheEntryCollection.cs
5 // Marcos Henrih (marcos.henrich@xamarin.com)
7 // Copyright 2014 Xamarin, Inc (http://www.xamarin.com)
9 // Permission is hereby granted, free of charge, to any person obtaining a copy
10 // of this software and associated documentation files (the "Software"), to deal
11 // in the Software without restriction, including without limitation the rights
12 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
13 // copies of the Software, and to permit persons to whom the Software is
14 // furnished to do so, subject to the following conditions:
16 // The above copyright notice and this permission notice shall be included in
17 // all copies or substantial portions of the Software.
19 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
22 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
23 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
24 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
27 using System.Collections;
28 using System.Collections.Generic;
31 namespace System.Runtime.Caching
33 interface ICacheEntryHelper : IComparer<MemoryCacheEntry>
35 DateTime GetDateTime (MemoryCacheEntry entry);
38 class CacheEntryCollection
40 protected MemoryCacheStore store;
41 private ICacheEntryHelper helper;
42 private SortedSet <MemoryCacheEntry> entries;
44 protected CacheEntryCollection (MemoryCacheStore store, ICacheEntryHelper helper)
48 entries = new SortedSet <MemoryCacheEntry> (helper);
51 protected void Add (MemoryCacheEntry entry)
56 protected void Remove (MemoryCacheEntry entry)
58 entries.Remove (entry);
61 protected int FlushItems (DateTime limit, CacheEntryRemovedReason reason, bool blockInsert, int count = int.MaxValue)
67 foreach (var entry in entries) {
68 if (helper.GetDateTime (entry) > limit || flushedItems >= count)
74 for (var f = 0; f < flushedItems; f++)
75 store.Remove (entries.Min, null, reason);
78 store.UnblockInsert ();