1 files changed, 44 insertions, 0 deletions
diff --git a/chromium/net/disk_cache/memory/mem_rankings.h b/chromium/net/disk_cache/memory/mem_rankings.h
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index 00000000000..b75bfc14fb9
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+++ b/chromium/net/disk_cache/memory/mem_rankings.h
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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_MEMORY_MEM_RANKINGS_H_
+#define NET_DISK_CACHE_MEMORY_MEM_RANKINGS_H_
+
+#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_MEMORY_MEM_RANKINGS_H_