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