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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 
32 namespace blink {
33 
ThreadSafeDataTransport()34 ThreadSafeDataTransport::ThreadSafeDataTransport()
35     : m_readBuffer(SharedBuffer::create())
36     , m_allDataReceived(false)
37     , m_readPosition(0)
38 {
39 }
40 
~ThreadSafeDataTransport()41 ThreadSafeDataTransport::~ThreadSafeDataTransport()
42 {
43 }
44 
setData(SharedBuffer * buffer,bool allDataReceived)45 void 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 
data(SharedBuffer ** buffer,bool * allDataReceived)61 void 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 
hasNewData()76 bool ThreadSafeDataTransport::hasNewData()
77 {
78     MutexLocker lock(m_mutex);
79     return !m_newBufferQueue.isEmpty();
80 }
81 
82 } // namespace blink
83