1/*
2 * Copyright (C) 2010, 2012 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 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "SQLiteDatabaseTracker.h"
28
29#include <mutex>
30#include <wtf/Lock.h>
31
32namespace WebCore {
33
34namespace SQLiteDatabaseTracker {
35
36static SQLiteDatabaseTrackerClient* s_staticSQLiteDatabaseTrackerClient = nullptr;
37static unsigned s_transactionInProgressCounter = 0;
38
39static Lock transactionInProgressMutex;
40
41void setClient(SQLiteDatabaseTrackerClient* client)
42{
43 std::lock_guard<Lock> lock(transactionInProgressMutex);
44 s_staticSQLiteDatabaseTrackerClient = client;
45}
46
47void incrementTransactionInProgressCount()
48{
49 std::lock_guard<Lock> lock(transactionInProgressMutex);
50 if (!s_staticSQLiteDatabaseTrackerClient)
51 return;
52
53 s_transactionInProgressCounter++;
54 if (s_transactionInProgressCounter == 1)
55 s_staticSQLiteDatabaseTrackerClient->willBeginFirstTransaction();
56}
57
58void decrementTransactionInProgressCount()
59{
60 std::lock_guard<Lock> lock(transactionInProgressMutex);
61 if (!s_staticSQLiteDatabaseTrackerClient)
62 return;
63
64 ASSERT(s_transactionInProgressCounter);
65 s_transactionInProgressCounter--;
66
67 if (!s_transactionInProgressCounter)
68 s_staticSQLiteDatabaseTrackerClient->didFinishLastTransaction();
69}
70
71bool hasTransactionInProgress()
72{
73 std::lock_guard<Lock> lock(transactionInProgressMutex);
74 return !s_staticSQLiteDatabaseTrackerClient || s_transactionInProgressCounter > 0;
75}
76
77} // namespace SQLiteDatabaseTracker
78
79} // namespace WebCore
80