1/*
2 * Copyright (C) 2007, 2013, 2015 Apple 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 * 3. Neither the name of Apple Inc. ("Apple") nor the names of
14 * its contributors may be used to endorse or promote products derived
15 * from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#pragma once
30
31#include "SQLTransactionStateMachine.h"
32#include <memory>
33#include <wtf/Forward.h>
34#include <wtf/text/WTFString.h>
35
36namespace WebCore {
37
38class Database;
39class OriginLock;
40class SQLError;
41class SQLiteTransaction;
42class SQLStatement;
43class SQLTransaction;
44class SQLTransactionWrapper;
45
46class SQLTransactionBackend : public SQLTransactionStateMachine<SQLTransactionBackend> {
47public:
48 explicit SQLTransactionBackend(SQLTransaction&);
49 ~SQLTransactionBackend();
50
51 void notifyDatabaseThreadIsShuttingDown();
52
53 // API called from the frontend published via SQLTransactionBackend:
54 void requestTransitToState(SQLTransactionState);
55
56private:
57 friend class SQLTransaction;
58
59 void doCleanup();
60
61 // State Machine functions:
62 StateFunction stateFunctionFor(SQLTransactionState) override;
63 void computeNextStateAndCleanupIfNeeded();
64
65 // State functions:
66 void acquireLock();
67 void openTransactionAndPreflight();
68 void runStatements();
69 void cleanupAndTerminate();
70 void cleanupAfterTransactionErrorCallback();
71
72 NO_RETURN_DUE_TO_ASSERT void unreachableState();
73
74 SQLTransaction& m_frontend;
75};
76
77} // namespace WebCore
78