1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 // See net/disk_cache/disk_cache.h for the public interface. 6 7 #ifndef NET_DISK_CACHE_MEM_RANKINGS_H__ 8 #define NET_DISK_CACHE_MEM_RANKINGS_H__ 9 10 #include "base/basictypes.h" 11 12 namespace disk_cache { 13 14 class MemEntryImpl; 15 16 // This class handles the ranking information for the memory-only cache. 17 class MemRankings { 18 public: 19 MemRankings() : head_(NULL), tail_(NULL) {} 20 ~MemRankings(); 21 22 // Inserts a given entry at the head of the queue. 23 void Insert(MemEntryImpl* node); 24 25 // Removes a given entry from the LRU list. 26 void Remove(MemEntryImpl* node); 27 28 // Moves a given entry to the head. 29 void UpdateRank(MemEntryImpl* node); 30 31 // Iterates through the list. 32 MemEntryImpl* GetNext(MemEntryImpl* node); 33 MemEntryImpl* GetPrev(MemEntryImpl* node); 34 35 private: 36 MemEntryImpl* head_; 37 MemEntryImpl* tail_; 38 39 DISALLOW_COPY_AND_ASSIGN(MemRankings); 40 }; 41 42 } // namespace disk_cache 43 44 #endif // NET_DISK_CACHE_MEM_RANKINGS_H__ 45
