1  /*
 2   * Copyright (C) 2019 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 "CachePayload.h"
28  
29  namespace JSC {
30  
31  CachePayload CachePayload::makeMappedPayload(FileSystem::MappedFileData&& data)
32  {
33      return CachePayload(true, data.leakHandle(), data.size());
34  }
35  
36  CachePayload CachePayload::makeMallocPayload(MallocPtr<uint8_t, VMMalloc>&& data, size_t size)
37  {
38      return CachePayload(false, data.leakPtr(), size);
39  }
40  
41  CachePayload CachePayload::makeEmptyPayload()
42  {
43      return CachePayload(true, nullptr, 0);
44  }
45  
46  CachePayload::CachePayload(CachePayload&& other)
47  {
48      m_mapped = other.m_mapped;
49      m_size = other.m_size;
50      m_data = other.m_data;
51      other.m_mapped = false;
52      other.m_data = nullptr;
53      other.m_size = 0;
54  }
55  
56  CachePayload::~CachePayload()
57  {
58      freeData();
59  }
60  
61  CachePayload& CachePayload::operator=(CachePayload&& other)
62  {
63      ASSERT(&other != this);
64      freeData();
65      return *new (this) CachePayload(WTFMove(other));
66  }
67  
68  void CachePayload::freeData()
69  {
70      if (!m_data)
71          return;
72      if (m_mapped) {
73          FileSystem::unmapViewOfFile(m_data, m_size);
74      } else
75          fastFree(m_data);
76  }
77  
78  } // namespace JSC