//
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// Copyright (c) 2016-2019 Vinnie Falco (vinnie dot falco at gmail dot com)
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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// Official repository: https://github.com/boostorg/beast
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//
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#ifndef BOOST_BEAST_TEST_IMPL_STREAM_HPP
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#define BOOST_BEAST_TEST_IMPL_STREAM_HPP
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#include <boost/beast/core/bind_handler.hpp>
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#include <boost/beast/core/buffer_traits.hpp>
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#include <boost/beast/core/detail/service_base.hpp>
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#include <boost/beast/core/detail/is_invocable.hpp>
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#include <boost/asio/any_io_executor.hpp>
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#include <boost/asio/dispatch.hpp>
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#include <boost/asio/post.hpp>
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#include <mutex>
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#include <stdexcept>
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#include <vector>
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namespace boost {
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namespace beast {
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namespace test {
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//------------------------------------------------------------------------------
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struct stream::service_impl
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{
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std::mutex m_;
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std::vector<state*> v_;
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BOOST_BEAST_DECL
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void
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remove(state& impl);
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};
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class stream::service
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: public beast::detail::service_base<service>
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{
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boost::shared_ptr<service_impl> sp_;
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BOOST_BEAST_DECL
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void
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shutdown() override;
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public:
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BOOST_BEAST_DECL
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explicit
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service(net::execution_context& ctx);
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BOOST_BEAST_DECL
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static
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auto
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make_impl(
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net::io_context& ctx,
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test::fail_count* fc) ->
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boost::shared_ptr<state>;
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};
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//------------------------------------------------------------------------------
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template<class Handler, class Buffers>
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class stream::read_op : public stream::read_op_base
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{
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using ex1_type =
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net::io_context::executor_type;
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using ex2_type
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= net::associated_executor_t<Handler, ex1_type>;
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struct lambda
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{
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Handler h_;
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boost::weak_ptr<state> wp_;
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Buffers b_;
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#if defined(BOOST_ASIO_NO_TS_EXECUTORS)
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net::any_io_executor wg2_;
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#else // defined(BOOST_ASIO_NO_TS_EXECUTORS)
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net::executor_work_guard<ex2_type> wg2_;
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#endif // defined(BOOST_ASIO_NO_TS_EXECUTORS)
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lambda(lambda&&) = default;
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lambda(lambda const&) = default;
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template<class Handler_>
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lambda(
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Handler_&& h,
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boost::shared_ptr<state> const& s,
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Buffers const& b)
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: h_(std::forward<Handler_>(h))
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, wp_(s)
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, b_(b)
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#if defined(BOOST_ASIO_NO_TS_EXECUTORS)
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, wg2_(net::prefer(
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net::get_associated_executor(
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h_, s->ioc.get_executor()),
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net::execution::outstanding_work.tracked))
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#else // defined(BOOST_ASIO_NO_TS_EXECUTORS)
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, wg2_(net::get_associated_executor(
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h_, s->ioc.get_executor()))
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#endif // defined(BOOST_ASIO_NO_TS_EXECUTORS)
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{
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}
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using allocator_type = net::associated_allocator_t<Handler>;
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allocator_type get_allocator() const noexcept
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{
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return net::get_associated_allocator(h_);
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}
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void
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operator()(error_code ec)
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{
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std::size_t bytes_transferred = 0;
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auto sp = wp_.lock();
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if(! sp)
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ec = net::error::operation_aborted;
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if(! ec)
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{
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std::lock_guard<std::mutex> lock(sp->m);
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BOOST_ASSERT(! sp->op);
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if(sp->b.size() > 0)
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{
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bytes_transferred =
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net::buffer_copy(
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b_, sp->b.data(), sp->read_max);
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sp->b.consume(bytes_transferred);
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sp->nread_bytes += bytes_transferred;
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}
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else if (buffer_bytes(b_) > 0)
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{
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ec = net::error::eof;
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}
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}
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#if defined(BOOST_ASIO_NO_TS_EXECUTORS)
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net::dispatch(wg2_,
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beast::bind_front_handler(std::move(h_),
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ec, bytes_transferred));
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wg2_ = net::any_io_executor(); // probably unnecessary
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#else // defined(BOOST_ASIO_NO_TS_EXECUTORS)
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net::dispatch(wg2_.get_executor(),
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beast::bind_front_handler(std::move(h_),
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ec, bytes_transferred));
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wg2_.reset();
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#endif // defined(BOOST_ASIO_NO_TS_EXECUTORS)
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}
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};
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lambda fn_;
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#if defined(BOOST_ASIO_NO_TS_EXECUTORS)
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net::any_io_executor wg1_;
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#else // defined(BOOST_ASIO_NO_TS_EXECUTORS)
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net::executor_work_guard<ex1_type> wg1_;
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#endif // defined(BOOST_ASIO_NO_TS_EXECUTORS)
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public:
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template<class Handler_>
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read_op(
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Handler_&& h,
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boost::shared_ptr<state> const& s,
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Buffers const& b)
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: fn_(std::forward<Handler_>(h), s, b)
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#if defined(BOOST_ASIO_NO_TS_EXECUTORS)
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, wg1_(net::prefer(s->ioc.get_executor(),
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net::execution::outstanding_work.tracked))
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#else // defined(BOOST_ASIO_NO_TS_EXECUTORS)
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, wg1_(s->ioc.get_executor())
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#endif // defined(BOOST_ASIO_NO_TS_EXECUTORS)
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{
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}
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void
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operator()(error_code ec) override
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{
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#if defined(BOOST_ASIO_NO_TS_EXECUTORS)
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net::post(wg1_, beast::bind_front_handler(std::move(fn_), ec));
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wg1_ = net::any_io_executor(); // probably unnecessary
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#else // defined(BOOST_ASIO_NO_TS_EXECUTORS)
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net::post(wg1_.get_executor(),
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beast::bind_front_handler(std::move(fn_), ec));
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wg1_.reset();
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#endif // defined(BOOST_ASIO_NO_TS_EXECUTORS)
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}
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};
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struct stream::run_read_op
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{
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template<
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class ReadHandler,
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class MutableBufferSequence>
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void
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operator()(
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ReadHandler&& h,
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boost::shared_ptr<state> const& in,
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MutableBufferSequence const& buffers)
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{
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// If you get an error on the following line it means
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// that your handler does not meet the documented type
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// requirements for the handler.
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static_assert(
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beast::detail::is_invocable<ReadHandler,
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void(error_code, std::size_t)>::value,
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"ReadHandler type requirements not met");
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initiate_read(
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in,
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std::unique_ptr<read_op_base>{
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new read_op<
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typename std::decay<ReadHandler>::type,
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MutableBufferSequence>(
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std::move(h),
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in,
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buffers)},
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buffer_bytes(buffers));
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}
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};
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struct stream::run_write_op
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{
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template<
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class WriteHandler,
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class ConstBufferSequence>
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void
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operator()(
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WriteHandler&& h,
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boost::shared_ptr<state> in_,
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boost::weak_ptr<state> out_,
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ConstBufferSequence const& buffers)
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{
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// If you get an error on the following line it means
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// that your handler does not meet the documented type
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// requirements for the handler.
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static_assert(
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beast::detail::is_invocable<WriteHandler,
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void(error_code, std::size_t)>::value,
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"WriteHandler type requirements not met");
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++in_->nwrite;
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auto const upcall = [&](error_code ec, std::size_t n)
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{
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net::post(
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in_->ioc.get_executor(),
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beast::bind_front_handler(std::move(h), ec, n));
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};
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// test failure
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error_code ec;
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std::size_t n = 0;
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if(in_->fc && in_->fc->fail(ec))
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return upcall(ec, n);
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// A request to write 0 bytes to a stream is a no-op.
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if(buffer_bytes(buffers) == 0)
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return upcall(ec, n);
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// connection closed
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auto out = out_.lock();
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if(! out)
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return upcall(net::error::connection_reset, n);
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// copy buffers
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n = std::min<std::size_t>(
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buffer_bytes(buffers), in_->write_max);
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{
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std::lock_guard<std::mutex> lock(out->m);
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n = net::buffer_copy(out->b.prepare(n), buffers);
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out->b.commit(n);
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out->nwrite_bytes += n;
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out->notify_read();
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}
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BOOST_ASSERT(! ec);
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upcall(ec, n);
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}
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};
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//------------------------------------------------------------------------------
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template<class MutableBufferSequence>
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std::size_t
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stream::
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read_some(MutableBufferSequence const& buffers)
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{
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static_assert(net::is_mutable_buffer_sequence<
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MutableBufferSequence>::value,
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"MutableBufferSequence type requirements not met");
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error_code ec;
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auto const n = read_some(buffers, ec);
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if(ec)
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BOOST_THROW_EXCEPTION(system_error{ec});
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return n;
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}
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template<class MutableBufferSequence>
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std::size_t
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stream::
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read_some(MutableBufferSequence const& buffers,
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error_code& ec)
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{
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static_assert(net::is_mutable_buffer_sequence<
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MutableBufferSequence>::value,
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"MutableBufferSequence type requirements not met");
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++in_->nread;
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// test failure
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if(in_->fc && in_->fc->fail(ec))
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return 0;
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// A request to read 0 bytes from a stream is a no-op.
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if(buffer_bytes(buffers) == 0)
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{
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ec = {};
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return 0;
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}
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std::unique_lock<std::mutex> lock{in_->m};
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BOOST_ASSERT(! in_->op);
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in_->cv.wait(lock,
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[&]()
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{
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return
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in_->b.size() > 0 ||
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in_->code != status::ok;
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});
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// deliver bytes before eof
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if(in_->b.size() > 0)
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{
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auto const n = net::buffer_copy(
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buffers, in_->b.data(), in_->read_max);
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in_->b.consume(n);
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in_->nread_bytes += n;
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return n;
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}
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// deliver error
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BOOST_ASSERT(in_->code != status::ok);
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ec = net::error::eof;
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return 0;
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}
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template<class MutableBufferSequence, BOOST_BEAST_ASYNC_TPARAM2 ReadHandler>
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BOOST_BEAST_ASYNC_RESULT2(ReadHandler)
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stream::
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async_read_some(
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MutableBufferSequence const& buffers,
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ReadHandler&& handler)
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{
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static_assert(net::is_mutable_buffer_sequence<
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MutableBufferSequence>::value,
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"MutableBufferSequence type requirements not met");
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return net::async_initiate<
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ReadHandler,
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void(error_code, std::size_t)>(
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run_read_op{},
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handler,
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in_,
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buffers);
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}
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template<class ConstBufferSequence>
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std::size_t
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stream::
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write_some(ConstBufferSequence const& buffers)
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{
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static_assert(net::is_const_buffer_sequence<
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ConstBufferSequence>::value,
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"ConstBufferSequence type requirements not met");
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error_code ec;
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auto const bytes_transferred =
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write_some(buffers, ec);
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if(ec)
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BOOST_THROW_EXCEPTION(system_error{ec});
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return bytes_transferred;
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}
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template<class ConstBufferSequence>
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std::size_t
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stream::
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write_some(
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ConstBufferSequence const& buffers, error_code& ec)
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{
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static_assert(net::is_const_buffer_sequence<
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ConstBufferSequence>::value,
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"ConstBufferSequence type requirements not met");
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++in_->nwrite;
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// test failure
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if(in_->fc && in_->fc->fail(ec))
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return 0;
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// A request to write 0 bytes to a stream is a no-op.
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if(buffer_bytes(buffers) == 0)
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{
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ec = {};
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return 0;
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}
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// connection closed
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auto out = out_.lock();
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if(! out)
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{
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ec = net::error::connection_reset;
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return 0;
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}
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// copy buffers
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auto n = std::min<std::size_t>(
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buffer_bytes(buffers), in_->write_max);
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{
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std::lock_guard<std::mutex> lock(out->m);
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n = net::buffer_copy(out->b.prepare(n), buffers);
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out->b.commit(n);
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out->nwrite_bytes += n;
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out->notify_read();
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}
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return n;
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}
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template<class ConstBufferSequence, BOOST_BEAST_ASYNC_TPARAM2 WriteHandler>
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BOOST_BEAST_ASYNC_RESULT2(WriteHandler)
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stream::
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async_write_some(
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ConstBufferSequence const& buffers,
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WriteHandler&& handler)
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{
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static_assert(net::is_const_buffer_sequence<
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ConstBufferSequence>::value,
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"ConstBufferSequence type requirements not met");
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return net::async_initiate<
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WriteHandler,
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void(error_code, std::size_t)>(
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run_write_op{},
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handler,
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in_,
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out_,
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buffers);
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}
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//------------------------------------------------------------------------------
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template<class TeardownHandler>
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void
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async_teardown(
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role_type,
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stream& s,
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TeardownHandler&& handler)
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{
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error_code ec;
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if( s.in_->fc &&
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s.in_->fc->fail(ec))
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return net::post(
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s.get_executor(),
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beast::bind_front_handler(
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std::move(handler), ec));
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s.close();
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if( s.in_->fc &&
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s.in_->fc->fail(ec))
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ec = net::error::eof;
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else
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ec = {};
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net::post(
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s.get_executor(),
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beast::bind_front_handler(
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std::move(handler), ec));
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}
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//------------------------------------------------------------------------------
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template<class Arg1, class... ArgN>
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stream
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connect(stream& to, Arg1&& arg1, ArgN&&... argn)
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{
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stream from{
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std::forward<Arg1>(arg1),
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std::forward<ArgN>(argn)...};
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from.connect(to);
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return from;
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}
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} // test
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} // beast
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} // boost
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#endif
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