2 * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.
3 * Copyright (C) 2007 Justin Haygood (jhaygood@reaktix.com)
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
14 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 #ifndef SQLiteDatabase_h
28 #define SQLiteDatabase_h
30 #include "PlatformString.h"
31 #include <wtf/Threading.h>
34 #pragma warning(disable: 4800)
41 class DatabaseAuthorizer;
42 class SQLiteStatement;
43 class SQLiteTransaction;
45 extern const int SQLResultDone;
46 extern const int SQLResultError;
47 extern const int SQLResultOk;
48 extern const int SQLResultRow;
49 extern const int SQLResultSchema;
50 extern const int SQLResultFull;
51 extern const int SQLResultInterrupt;
53 class SQLiteDatabase {
54 WTF_MAKE_NONCOPYABLE(SQLiteDatabase);
55 friend class SQLiteTransaction;
60 bool open(const String& filename, bool forWebSQLDatabase = false);
61 bool isOpen() const { return m_db; }
66 bool executeCommand(const String&);
67 bool returnsAtLeastOneResult(const String&);
69 bool tableExists(const String&);
70 void clearAllTables();
71 void runVacuumCommand();
72 void runIncrementalVacuumCommand();
74 bool transactionInProgress() const { return m_transactionInProgress; }
76 int64_t lastInsertRowID();
79 void setBusyTimeout(int ms);
80 void setBusyHandler(int(*)(void*, int));
82 void setFullsync(bool);
84 // Gets/sets the maximum size in bytes
85 // Depending on per-database attributes, the size will only be settable in units that are the page size of the database, which is established at creation
86 // These chunks will never be anything other than 512, 1024, 2048, 4096, 8192, 16384, or 32768 bytes in size.
87 // setMaximumSize() will round the size down to the next smallest chunk if the passed size doesn't align.
88 int64_t maximumSize();
89 void setMaximumSize(int64_t);
91 // Gets the number of unused bytes in the database file.
92 int64_t freeSpaceSize();
95 // The SQLite SYNCHRONOUS pragma can be either FULL, NORMAL, or OFF
96 // FULL - Any writing calls to the DB block until the data is actually on the disk surface
97 // NORMAL - SQLite pauses at some critical moments when writing, but much less than FULL
98 // OFF - Calls return immediately after the data has been passed to disk
99 enum SynchronousPragma { SyncOff = 0, SyncNormal = 1, SyncFull = 2 };
100 void setSynchronous(SynchronousPragma);
103 const char* lastErrorMsg();
105 sqlite3* sqlite3Handle() const {
106 ASSERT(m_sharable || currentThread() == m_openingThread);
110 void setAuthorizer(PassRefPtr<DatabaseAuthorizer>);
112 Mutex& databaseMutex() { return m_lockingMutex; }
113 bool isAutoCommitOn() const;
115 // The SQLite AUTO_VACUUM pragma can be either NONE, FULL, or INCREMENTAL.
116 // NONE - SQLite does not do any vacuuming
117 // FULL - SQLite moves all empty pages to the end of the DB file and truncates
118 // the file to remove those pages after every transaction. This option
119 // requires SQLite to store additional information about each page in
120 // the database file.
121 // INCREMENTAL - SQLite stores extra information for each page in the database
122 // file, but removes the empty pages only when PRAGMA INCREMANTAL_VACUUM
124 enum AutoVacuumPragma { AutoVacuumNone = 0, AutoVacuumFull = 1, AutoVacuumIncremental = 2 };
125 bool turnOnIncrementalAutoVacuum();
127 // Set this flag to allow access from multiple threads. Not all multi-threaded accesses are safe!
128 // See http://www.sqlite.org/cvstrac/wiki?p=MultiThreading for more info.
130 void disableThreadingChecks();
132 void disableThreadingChecks() {}
136 static int authorizerFunction(void*, int, const char*, const char*, const char*, const char*);
138 void enableAuthorizer(bool enable);
145 bool m_transactionInProgress;
148 Mutex m_authorizerLock;
149 RefPtr<DatabaseAuthorizer> m_authorizer;
151 Mutex m_lockingMutex;
152 ThreadIdentifier m_openingThread;
154 Mutex m_databaseClosingMutex;
156 }; // class SQLiteDatabase
158 } // namespace WebCore