111 lines
3.0 KiB
C++
111 lines
3.0 KiB
C++
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/* Copyright 2016, Ableton AG, Berlin. All rights reserved.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* If you would like to incorporate Link into a proprietary software application,
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* please contact <link-devs@ableton.com>.
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*/
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#pragma once
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#include <ableton/platforms/asio/AsioWrapper.hpp>
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#include <ableton/util/SafeAsyncHandler.hpp>
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#include <array>
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#include <cassert>
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namespace ableton
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{
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namespace platforms
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{
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namespace asio
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{
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template <std::size_t MaxPacketSize>
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struct Socket
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{
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Socket(::asio::io_service& io)
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: mpImpl(std::make_shared<Impl>(io))
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{
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}
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Socket(const Socket&) = delete;
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Socket& operator=(const Socket&) = delete;
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Socket(Socket&& rhs)
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: mpImpl(std::move(rhs.mpImpl))
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{
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}
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std::size_t send(const uint8_t* const pData,
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const size_t numBytes,
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const ::asio::ip::udp::endpoint& to)
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{
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assert(numBytes < MaxPacketSize);
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return mpImpl->mSocket.send_to(::asio::buffer(pData, numBytes), to);
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}
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template <typename Handler>
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void receive(Handler handler)
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{
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mpImpl->mHandler = std::move(handler);
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mpImpl->mSocket.async_receive_from(
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::asio::buffer(mpImpl->mReceiveBuffer, MaxPacketSize), mpImpl->mSenderEndpoint,
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util::makeAsyncSafe(mpImpl));
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}
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::asio::ip::udp::endpoint endpoint() const
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{
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return mpImpl->mSocket.local_endpoint();
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}
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struct Impl
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{
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Impl(::asio::io_service& io)
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: mSocket(io, ::asio::ip::udp::v4())
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{
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}
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~Impl()
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{
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// Ignore error codes in shutdown and close as the socket may
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// have already been forcibly closed
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::asio::error_code ec;
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mSocket.shutdown(::asio::ip::udp::socket::shutdown_both, ec);
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mSocket.close(ec);
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}
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void operator()(const ::asio::error_code& error, const std::size_t numBytes)
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{
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if (!error && numBytes > 0 && numBytes <= MaxPacketSize)
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{
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const auto bufBegin = begin(mReceiveBuffer);
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mHandler(mSenderEndpoint, bufBegin, bufBegin + static_cast<ptrdiff_t>(numBytes));
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}
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}
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::asio::ip::udp::socket mSocket;
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::asio::ip::udp::endpoint mSenderEndpoint;
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using Buffer = std::array<uint8_t, MaxPacketSize>;
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Buffer mReceiveBuffer;
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using ByteIt = typename Buffer::const_iterator;
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std::function<void(const ::asio::ip::udp::endpoint&, ByteIt, ByteIt)> mHandler;
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};
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std::shared_ptr<Impl> mpImpl;
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};
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} // namespace asio
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} // namespace platforms
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} // namespace ableton
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