| OLD | NEW |
|---|
| (Empty) |
| 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 #ifndef ThreadSafeDataTransport_h | |
| 27 #define ThreadSafeDataTransport_h | |
| 28 | |
| 29 #include "platform/PlatformExport.h" | |
| 30 #include "wtf/Allocator.h" | |
| 31 #include "wtf/Noncopyable.h" | |
| 32 #include "wtf/OwnPtr.h" | |
| 33 #include "wtf/PassOwnPtr.h" | |
| 34 #include "wtf/RefPtr.h" | |
| 35 #include "wtf/ThreadSafeRefCounted.h" | |
| 36 #include "wtf/ThreadingPrimitives.h" | |
| 37 #include "wtf/Vector.h" | |
| 38 | |
| 39 namespace blink { | |
| 40 | |
| 41 class SharedBuffer; | |
| 42 | |
| 43 // The purpose of this class is to allow the transfer of data stored in | |
| 44 // SharedBuffer in a thread-safe manner, and to minimize memory copies | |
| 45 // and thread contention. | |
| 46 // | |
| 47 // This class is designed such that there is only one producer and | |
| 48 // one consumer. | |
| 49 | |
| 50 class PLATFORM_EXPORT ThreadSafeDataTransport final : public ThreadSafeRefCounte
d<ThreadSafeDataTransport> { | |
| 51 WTF_MAKE_NONCOPYABLE(ThreadSafeDataTransport); | |
| 52 public: | |
| 53 ThreadSafeDataTransport(); | |
| 54 ~ThreadSafeDataTransport(); | |
| 55 | |
| 56 // This method is being called subsequently with an expanding | |
| 57 // SharedBuffer. | |
| 58 void setData(SharedBuffer*, bool allDataReceived); | |
| 59 | |
| 60 // Get the data submitted to this class so far. | |
| 61 void data(SharedBuffer**, bool* allDataReceived); | |
| 62 | |
| 63 // Return true of there is new data submitted to this class | |
| 64 // since last time data() was called. | |
| 65 bool hasNewData(); | |
| 66 | |
| 67 private: | |
| 68 Mutex m_mutex; | |
| 69 | |
| 70 Vector<RefPtr<SharedBuffer>> m_newBufferQueue; | |
| 71 RefPtr<SharedBuffer> m_readBuffer; | |
| 72 bool m_allDataReceived; | |
| 73 size_t m_readPosition; | |
| 74 }; | |
| 75 | |
| 76 } // namespace blink | |
| 77 | |
| 78 #endif | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 1812273003:
Eliminate copies of encoded image data (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master