1/*
2 * Copyright (C) 2012 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
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 COMPUTER, 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 COMPUTER, 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
28#include "platform/graphics/ThreadSafeDataTransport.h"
29
30#include "platform/SharedBuffer.h"
31
32namespace blink {
33
34ThreadSafeDataTransport::ThreadSafeDataTransport()
35    : m_readBuffer(SharedBuffer::create())
36    , m_allDataReceived(false)
37    , m_readPosition(0)
38{
39}
40
41ThreadSafeDataTransport::~ThreadSafeDataTransport()
42{
43}
44
45void ThreadSafeDataTransport::setData(SharedBuffer* buffer, bool allDataReceived)
46{
47    ASSERT(buffer->size() >= m_readPosition);
48    Vector<RefPtr<SharedBuffer> > newBufferQueue;
49
50    const char* segment = 0;
51    while (size_t length = buffer->getSomeData(segment, m_readPosition)) {
52        m_readPosition += length;
53        newBufferQueue.append(SharedBuffer::create(segment, length));
54    }
55
56    MutexLocker locker(m_mutex);
57    m_newBufferQueue.appendVector(newBufferQueue);
58    m_allDataReceived = allDataReceived;
59}
60
61void ThreadSafeDataTransport::data(SharedBuffer** buffer, bool* allDataReceived)
62{
63    ASSERT(buffer);
64    ASSERT(allDataReceived);
65    Vector<RefPtr<SharedBuffer> > newBufferQueue;
66    {
67        MutexLocker lock(m_mutex);
68        m_newBufferQueue.swap(newBufferQueue);
69        *allDataReceived = m_allDataReceived;
70    }
71    for (size_t i = 0; i < newBufferQueue.size(); ++i)
72        m_readBuffer->append(newBufferQueue[i].get());
73    *buffer = m_readBuffer.get();
74}
75
76bool ThreadSafeDataTransport::hasNewData()
77{
78    MutexLocker lock(m_mutex);
79    return !m_newBufferQueue.isEmpty();
80}
81
82} // namespace blink
83