1/* 2 * Copyright (C) 2011 Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY 15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 16 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 17 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 18 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 19 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 20 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 21 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#ifndef LevelDBDatabase_h 27#define LevelDBDatabase_h 28 29#if USE(LEVELDB) 30 31#include <wtf/OwnPtr.h> 32#include <wtf/PassOwnPtr.h> 33#include <wtf/Vector.h> 34#include <wtf/text/WTFString.h> 35 36namespace leveldb { 37class Comparator; 38class DB; 39class Env; 40class Snapshot; 41} 42 43namespace WebCore { 44 45class LevelDBComparator; 46class LevelDBDatabase; 47class LevelDBIterator; 48class LevelDBSlice; 49class LevelDBWriteBatch; 50 51class LevelDBSnapshot { 52private: 53 friend class LevelDBDatabase; 54 friend class LevelDBTransaction; 55 56 explicit LevelDBSnapshot(LevelDBDatabase*); 57 ~LevelDBSnapshot(); 58 59 leveldb::DB* m_db; 60 const leveldb::Snapshot* m_snapshot; 61}; 62 63class LevelDBDatabase { 64public: 65 static PassOwnPtr<LevelDBDatabase> open(const String& fileName, const LevelDBComparator*); 66 static PassOwnPtr<LevelDBDatabase> openInMemory(const LevelDBComparator*); 67 static bool destroy(const String& fileName); 68 virtual ~LevelDBDatabase(); 69 70 bool put(const LevelDBSlice& key, const Vector<char>& value); 71 bool remove(const LevelDBSlice& key); 72 virtual bool safeGet(const LevelDBSlice& key, Vector<char>& value, bool& found, const LevelDBSnapshot* = 0); 73 bool write(LevelDBWriteBatch&); 74 PassOwnPtr<LevelDBIterator> createIterator(const LevelDBSnapshot* = 0); 75 const LevelDBComparator* comparator() const; 76 77protected: 78 LevelDBDatabase(); 79 80private: 81 friend class LevelDBSnapshot; 82 83 OwnPtr<leveldb::Env> m_env; 84 OwnPtr<leveldb::Comparator> m_comparatorAdapter; 85 OwnPtr<leveldb::DB> m_db; 86 const LevelDBComparator* m_comparator; 87}; 88 89} 90 91#endif 92#endif 93