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 "platform/heap/Handle.h"
31 #include "wtf/Threading.h"
32 #include "wtf/ThreadingPrimitives.h"
33 #include "wtf/text/CString.h"
34 #include "wtf/text/WTFString.h"
37 #pragma warning(disable: 4800)
44 class DatabaseAuthorizer;
45 class SQLiteStatement;
46 class SQLiteTransaction;
48 extern const int SQLResultDone;
49 extern const int SQLResultOk;
50 extern const int SQLResultRow;
51 extern const int SQLResultFull;
52 extern const int SQLResultInterrupt;
53 extern const int SQLResultConstraint;
55 class SQLiteDatabase {
56 DISALLOW_ALLOCATION();
57 WTF_MAKE_NONCOPYABLE(SQLiteDatabase);
58 friend class SQLiteTransaction;
63 bool open(const String& filename, bool forWebSQLDatabase = false);
64 bool isOpen() const { return m_db; }
69 void updateLastChangesCount();
71 bool executeCommand(const String&);
73 bool tableExists(const String&);
74 int runVacuumCommand();
75 int runIncrementalVacuumCommand();
77 bool transactionInProgress() const { return m_transactionInProgress; }
79 int64_t lastInsertRowID();
82 void setBusyTimeout(int ms);
84 // 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 void setMaximumSize(int64_t);
90 // Gets the number of unused bytes in the database file.
91 int64_t freeSpaceSize();
95 const char* lastErrorMsg();
97 sqlite3* sqlite3Handle() const {
98 ASSERT(m_sharable || currentThread() == m_openingThread || !m_db);
102 void setAuthorizer(DatabaseAuthorizer*);
104 Mutex& databaseMutex() { return m_lockingMutex; }
105 bool isAutoCommitOn() const;
107 // The SQLite AUTO_VACUUM pragma can be either NONE, FULL, or INCREMENTAL.
108 // NONE - SQLite does not do any vacuuming
109 // FULL - SQLite moves all empty pages to the end of the DB file and truncates
110 // the file to remove those pages after every transaction. This option
111 // requires SQLite to store additional information about each page in
112 // the database file.
113 // INCREMENTAL - SQLite stores extra information for each page in the database
114 // file, but removes the empty pages only when PRAGMA INCREMANTAL_VACUUM
116 enum AutoVacuumPragma { AutoVacuumNone = 0, AutoVacuumFull = 1, AutoVacuumIncremental = 2 };
117 bool turnOnIncrementalAutoVacuum();
119 void trace(Visitor*);
122 static int authorizerFunction(void*, int, const char*, const char*, const char*, const char*);
124 void enableAuthorizer(bool enable);
131 bool m_transactionInProgress;
134 Mutex m_authorizerLock;
135 RefPtrWillBeMember<DatabaseAuthorizer> m_authorizer;
137 Mutex m_lockingMutex;
138 ThreadIdentifier m_openingThread;
140 Mutex m_databaseClosingMutex;
144 CString m_openErrorMessage;
146 int m_lastChangesCount;