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