147 lines
4.0 KiB
C++
147 lines
4.0 KiB
C++
/*
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* Copyright (C) 2015 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <wtf/ThreadSafeRefCounted.h>
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#include <wtf/Vector.h>
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namespace WebCore {
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class ThreadSafeDataBuffer;
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class ThreadSafeDataBufferImpl : public ThreadSafeRefCounted<ThreadSafeDataBufferImpl> {
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friend class ThreadSafeDataBuffer;
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private:
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ThreadSafeDataBufferImpl(Vector<uint8_t>&& data)
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{
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m_data = WTFMove(data);
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}
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ThreadSafeDataBufferImpl(const Vector<uint8_t>& data)
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: m_data(data)
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{
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}
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ThreadSafeDataBufferImpl(const void* data, unsigned length)
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: m_data(length)
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{
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memcpy(m_data.data(), data, length);
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}
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Vector<uint8_t> m_data;
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};
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class ThreadSafeDataBuffer {
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public:
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static ThreadSafeDataBuffer create(Vector<uint8_t>&& data)
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{
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return ThreadSafeDataBuffer(WTFMove(data));
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}
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static ThreadSafeDataBuffer copyVector(const Vector<uint8_t>& data)
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{
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return ThreadSafeDataBuffer(data);
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}
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static ThreadSafeDataBuffer copyData(const void* data, unsigned length)
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{
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return ThreadSafeDataBuffer(data, length);
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}
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ThreadSafeDataBuffer()
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{
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}
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const Vector<uint8_t>* data() const
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{
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return m_impl ? &m_impl->m_data : nullptr;
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}
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size_t size() const
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{
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return m_impl ? m_impl->m_data.size() : 0;
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}
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bool operator==(const ThreadSafeDataBuffer& other) const
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{
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if (!m_impl)
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return !other.m_impl;
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return m_impl->m_data == other.m_impl->m_data;
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}
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template<class Encoder> void encode(Encoder&) const;
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template<class Decoder> static WARN_UNUSED_RETURN bool decode(Decoder&, ThreadSafeDataBuffer&);
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private:
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explicit ThreadSafeDataBuffer(Vector<uint8_t>&& data)
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{
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m_impl = adoptRef(new ThreadSafeDataBufferImpl(WTFMove(data)));
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}
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explicit ThreadSafeDataBuffer(const Vector<uint8_t>& data)
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{
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m_impl = adoptRef(new ThreadSafeDataBufferImpl(data));
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}
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explicit ThreadSafeDataBuffer(const void* data, unsigned length)
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{
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m_impl = adoptRef(new ThreadSafeDataBufferImpl(data, length));
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}
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RefPtr<ThreadSafeDataBufferImpl> m_impl;
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};
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template<class Encoder>
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void ThreadSafeDataBuffer::encode(Encoder& encoder) const
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{
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bool hasData = m_impl;
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encoder << hasData;
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if (hasData)
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encoder << m_impl->m_data;
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}
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template<class Decoder>
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bool ThreadSafeDataBuffer::decode(Decoder& decoder, ThreadSafeDataBuffer& result)
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{
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bool hasData;
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if (!decoder.decode(hasData))
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return false;
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if (hasData) {
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Vector<uint8_t> data;
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if (!decoder.decode(data))
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return false;
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result = ThreadSafeDataBuffer::create(WTFMove(data));
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}
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return true;
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}
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} // namespace WebCore
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