1/*
2 * Copyright (C) 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 * 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. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "IDBResourceIdentifier.h"
28
29#if ENABLE(INDEXED_DATABASE)
30
31#include "IDBConnectionToClient.h"
32#include "IDBConnectionToServer.h"
33#include "IDBRequest.h"
34#include <wtf/MainThread.h>
35#include <wtf/text/StringConcatenateNumbers.h>
36
37namespace WebCore {
38
39static uint64_t nextClientResourceNumber()
40{
41 static std::atomic<uint64_t> currentNumber(1);
42 return currentNumber += 2;
43}
44
45static uint64_t nextServerResourceNumber()
46{
47 ASSERT(isMainThread());
48 static uint64_t currentNumber = 0;
49 return currentNumber += 2;
50}
51
52IDBResourceIdentifier::IDBResourceIdentifier()
53{
54}
55
56IDBResourceIdentifier::IDBResourceIdentifier(uint64_t connectionIdentifier, uint64_t resourceIdentifier)
57 : m_idbConnectionIdentifier(connectionIdentifier)
58 , m_resourceNumber(resourceIdentifier)
59{
60}
61
62IDBResourceIdentifier::IDBResourceIdentifier(const IDBClient::IDBConnectionProxy& connectionProxy)
63 : m_idbConnectionIdentifier(connectionProxy.serverConnectionIdentifier())
64 , m_resourceNumber(nextClientResourceNumber())
65{
66}
67
68IDBResourceIdentifier::IDBResourceIdentifier(const IDBClient::IDBConnectionProxy& connectionProxy, const IDBRequest& request)
69 : m_idbConnectionIdentifier(connectionProxy.serverConnectionIdentifier())
70 , m_resourceNumber(request.resourceIdentifier().m_resourceNumber)
71{
72}
73
74IDBResourceIdentifier::IDBResourceIdentifier(const IDBServer::IDBConnectionToClient& connection)
75 : m_idbConnectionIdentifier(connection.identifier())
76 , m_resourceNumber(nextServerResourceNumber())
77{
78}
79
80IDBResourceIdentifier IDBResourceIdentifier::isolatedCopy() const
81{
82 return IDBResourceIdentifier(m_idbConnectionIdentifier, m_resourceNumber);
83}
84
85IDBResourceIdentifier IDBResourceIdentifier::emptyValue()
86{
87 return IDBResourceIdentifier(0, 0);
88}
89
90IDBResourceIdentifier IDBResourceIdentifier::deletedValue()
91{
92 return IDBResourceIdentifier(std::numeric_limits<uint64_t>::max(), std::numeric_limits<uint64_t>::max());
93}
94
95bool IDBResourceIdentifier::isHashTableDeletedValue() const
96{
97 return m_idbConnectionIdentifier == std::numeric_limits<uint64_t>::max()
98 && m_resourceNumber == std::numeric_limits<uint64_t>::max();
99}
100
101#if !LOG_DISABLED
102
103String IDBResourceIdentifier::loggingString() const
104{
105 return makeString('<', m_idbConnectionIdentifier, ", ", m_resourceNumber, '>');
106}
107
108#endif
109
110} // namespace WebCore
111
112#endif // ENABLE(INDEXED_DATABASE)
113