1/*
2 * Copyright (C) 2010 Google 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 are
6 * met:
7 *
8 *     * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *     * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 *     * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#ifndef WebThreadSafeData_h
32#define WebThreadSafeData_h
33
34#include "WebCommon.h"
35#include "WebPrivatePtr.h"
36
37#if !INSIDE_BLINK
38#include <string>
39#endif
40
41namespace blink {
42
43class RawData;
44
45// A container for raw bytes. It is inexpensive to copy a WebThreadSafeData object.
46// It is safe to pass a WebThreadSafeData across threads!!!
47class WebThreadSafeData {
48public:
49    WebThreadSafeData() { }
50    ~WebThreadSafeData() { reset(); }
51
52    BLINK_PLATFORM_EXPORT void assign(const WebThreadSafeData&);
53    BLINK_PLATFORM_EXPORT void reset();
54
55    BLINK_PLATFORM_EXPORT size_t size() const;
56    BLINK_PLATFORM_EXPORT const char* data() const;
57
58    bool isEmpty() const { return !size(); }
59
60#if INSIDE_BLINK
61    BLINK_PLATFORM_EXPORT WebThreadSafeData(const WTF::PassRefPtr<RawData>&);
62    BLINK_PLATFORM_EXPORT WebThreadSafeData& operator=(const WTF::PassRefPtr<RawData>&);
63#else
64    operator std::string() const
65    {
66        size_t len = size();
67        return len ? std::string(data(), len) : std::string();
68    }
69#endif
70
71private:
72    WebPrivatePtr<RawData> m_private;
73};
74
75} // namespace blink
76
77#endif
78