1/*
2 * Copyright (C) 2010-2017 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 "SharedStringHashTable.h"
28
29#include "SharedMemory.h"
30
31namespace WebKit {
32
33using namespace WebCore;
34
35SharedStringHashTable::SharedStringHashTable()
36{
37}
38
39SharedStringHashTable::~SharedStringHashTable()
40{
41}
42
43bool SharedStringHashTable::add(SharedStringHash sharedStringHash)
44{
45 auto* slot = findSlot(sharedStringHash);
46 ASSERT(slot);
47
48 // Check if the same link hash is in the table already.
49 if (*slot)
50 return false;
51
52 *slot = sharedStringHash;
53 return true;
54}
55
56bool SharedStringHashTable::remove(SharedStringHash sharedStringHash)
57{
58 auto* slot = findSlot(sharedStringHash);
59 if (!slot || !*slot)
60 return false;
61
62 *slot = 0;
63 return true;
64}
65
66void SharedStringHashTable::clear()
67{
68 if (!m_sharedMemory)
69 return;
70
71 memset(m_sharedMemory->data(), 0, m_sharedMemory->size());
72 setSharedMemory(nullptr);
73}
74
75} // namespace WebKit
76