Remove an unused FrameLoaderClient function
[WebKit-https.git] / Source / WebCore / platform / sql / SQLiteDatabaseTracker.cpp
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
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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/NeverDestroyed.h>
31
32 namespace WebCore {
33
34 namespace SQLiteDatabaseTracker {
35
36 static SQLiteDatabaseTrackerClient* s_staticSQLiteDatabaseTrackerClient = nullptr;
37 static unsigned s_transactionInProgressCounter = 0;
38
39 static std::mutex& transactionInProgressMutex()
40 {
41     static NeverDestroyed<std::mutex> tipMutex;
42     return tipMutex;
43 }
44
45 void setClient(SQLiteDatabaseTrackerClient* client)
46 {
47     ASSERT(client);
48     ASSERT(!s_staticSQLiteDatabaseTrackerClient || s_staticSQLiteDatabaseTrackerClient == client);
49     s_staticSQLiteDatabaseTrackerClient = client;
50 }
51
52 void incrementTransactionInProgressCount()
53 {
54     if (!s_staticSQLiteDatabaseTrackerClient)
55         return;
56
57     std::lock_guard<std::mutex> lock(transactionInProgressMutex());
58
59     s_transactionInProgressCounter++;
60     if (s_transactionInProgressCounter == 1)
61         s_staticSQLiteDatabaseTrackerClient->willBeginFirstTransaction();
62 }
63
64 void decrementTransactionInProgressCount()
65 {
66     if (!s_staticSQLiteDatabaseTrackerClient)
67         return;
68
69     std::lock_guard<std::mutex> lock(transactionInProgressMutex());
70
71     ASSERT(s_transactionInProgressCounter);
72     s_transactionInProgressCounter--;
73
74     if (!s_transactionInProgressCounter)
75         s_staticSQLiteDatabaseTrackerClient->didFinishLastTransaction();
76 }
77
78 #if !ASSERT_DISABLED
79 bool hasTransactionInProgress()
80 {
81     return !s_staticSQLiteDatabaseTrackerClient || s_transactionInProgressCounter > 0;
82 }
83 #endif
84
85 } // namespace SQLiteDatabaseTracker
86
87 } // namespace WebCore