49 lines
1.7 KiB
C++
49 lines
1.7 KiB
C++
#pragma once
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#include <nano/boost/asio/write.hpp>
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namespace nano
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{
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class shared_const_buffer
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{
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public:
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using value_type = boost::asio::const_buffer;
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using const_iterator = const boost::asio::const_buffer *;
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explicit shared_const_buffer (std::vector<uint8_t> const & data);
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explicit shared_const_buffer (uint8_t data);
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explicit shared_const_buffer (std::string const & data);
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explicit shared_const_buffer (std::vector<uint8_t> && data);
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explicit shared_const_buffer (std::shared_ptr<std::vector<uint8_t>> const & data);
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const boost::asio::const_buffer * begin () const;
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const boost::asio::const_buffer * end () const;
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size_t size () const;
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private:
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std::shared_ptr<std::vector<uint8_t>> m_data;
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boost::asio::const_buffer m_buffer;
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};
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static_assert (boost::asio::is_const_buffer_sequence<shared_const_buffer>::value, "Not ConstBufferSequence compliant");
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template <typename AsyncWriteStream, typename WriteHandler>
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BOOST_ASIO_INITFN_RESULT_TYPE (WriteHandler, void (boost::system::error_code, std::size_t))
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async_write (AsyncWriteStream & s, nano::shared_const_buffer const & buffer, WriteHandler && handler)
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{
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return boost::asio::async_write (s, buffer, std::move (handler));
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}
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/**
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* Alternative to nano::async_write where scatter/gather is desired for best performance, and where
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* the buffer originates from Flatbuffers.
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* @warning The buffers must be captured in the handler to ensure their lifetimes are properly extended.
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*/
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template <typename AsyncWriteStream, typename BufferType, typename WriteHandler>
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BOOST_ASIO_INITFN_RESULT_TYPE (WriteHandler, void (boost::system::error_code, std::size_t))
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unsafe_async_write (AsyncWriteStream & s, BufferType && buffer, WriteHandler && handler)
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{
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return boost::asio::async_write (s, buffer, std::move (handler));
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}
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}
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