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// Copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// See net/disk_cache/disk_cache.h for the public interface.
#ifndef NET_DISK_CACHE_MEM_RANKINGS_H__
#define NET_DISK_CACHE_MEM_RANKINGS_H__
#pragma once
#include "base/basictypes.h"
namespace disk_cache {
class MemEntryImpl;
// This class handles the ranking information for the memory-only cache.
class MemRankings {
public:
MemRankings() : head_(NULL), tail_(NULL) {}
~MemRankings();
// Inserts a given entry at the head of the queue.
void Insert(MemEntryImpl* node);
// Removes a given entry from the LRU list.
void Remove(MemEntryImpl* node);
// Moves a given entry to the head.
void UpdateRank(MemEntryImpl* node);
// Iterates through the list.
MemEntryImpl* GetNext(MemEntryImpl* node);
MemEntryImpl* GetPrev(MemEntryImpl* node);
private:
MemEntryImpl* head_;
MemEntryImpl* tail_;
DISALLOW_COPY_AND_ASSIGN(MemRankings);
};
} // namespace disk_cache
#endif // NET_DISK_CACHE_MEM_RANKINGS_H__
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