1 // Copyright (c) 2006-2008 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 of the cache. 6 7 #ifndef NET_DISK_CACHE_BLOCKFILE_FILE_BLOCK_H_ 8 #define NET_DISK_CACHE_BLOCKFILE_FILE_BLOCK_H_ 9 10 namespace disk_cache { 11 12 // This interface exposes common functionality for a single block of data 13 // stored on a file-block, regardless of the real type or size of the block. 14 // Used to simplify loading / storing the block from disk. 15 class FileBlock { 16 public: 17 virtual ~FileBlock() {} 18 19 // Returns a pointer to the actual data. 20 virtual void* buffer() const = 0; 21 22 // Returns the size of the block; 23 virtual size_t size() const = 0; 24 25 // Returns the file offset of this block. 26 virtual int offset() const = 0; 27 }; 28 29 } // namespace disk_cache 30 31 #endif // NET_DISK_CACHE_BLOCKFILE_FILE_BLOCK_H_ 32
