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+//
+// Copyright (c) 2016-2019 Vinnie Falco (vinnie dot falco at gmail dot com)
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+// Official repository: https://github.com/boostorg/beast
+//
+
+#ifndef BOOST_BEAST_TEST_IMPL_STREAM_IPP
+#define BOOST_BEAST_TEST_IMPL_STREAM_IPP
+
+#include <boost/beast/_experimental/test/stream.hpp>
+#include <boost/beast/core/bind_handler.hpp>
+#include <boost/beast/core/buffer_traits.hpp>
+#include <boost/beast/core/buffers_prefix.hpp>
+#include <boost/make_shared.hpp>
+#include <stdexcept>
+#include <vector>
+
+namespace boost {
+namespace beast {
+namespace test {
+
+//------------------------------------------------------------------------------
+
+stream::
+service::
+service(net::execution_context& ctx)
+ : beast::detail::service_base<service>(ctx)
+ , sp_(boost::make_shared<service_impl>())
+{
+}
+
+void
+stream::
+service::
+shutdown()
+{
+ std::vector<std::unique_ptr<read_op_base>> v;
+ std::lock_guard<std::mutex> g1(sp_->m_);
+ v.reserve(sp_->v_.size());
+ for(auto p : sp_->v_)
+ {
+ std::lock_guard<std::mutex> g2(p->m);
+ v.emplace_back(std::move(p->op));
+ p->code = status::eof;
+ }
+}
+
+auto
+stream::
+service::
+make_impl(
+ net::io_context& ctx,
+ test::fail_count* fc) ->
+ boost::shared_ptr<state>
+{
+ auto& svc = net::use_service<service>(ctx);
+ auto sp = boost::make_shared<state>(ctx, svc.sp_, fc);
+ std::lock_guard<std::mutex> g(svc.sp_->m_);
+ svc.sp_->v_.push_back(sp.get());
+ return sp;
+}
+
+void
+stream::
+service_impl::
+remove(state& impl)
+{
+ std::lock_guard<std::mutex> g(m_);
+ *std::find(
+ v_.begin(), v_.end(),
+ &impl) = std::move(v_.back());
+ v_.pop_back();
+}
+
+//------------------------------------------------------------------------------
+
+void stream::initiate_read(
+ boost::shared_ptr<state> const& in_,
+ std::unique_ptr<stream::read_op_base>&& op,
+ std::size_t buf_size)
+{
+ std::unique_lock<std::mutex> lock(in_->m);
+
+ ++in_->nread;
+ if(in_->op != nullptr)
+ BOOST_THROW_EXCEPTION(
+ std::logic_error{"in_->op != nullptr"});
+
+ // test failure
+ error_code ec;
+ if(in_->fc && in_->fc->fail(ec))
+ {
+ lock.unlock();
+ (*op)(ec);
+ return;
+ }
+
+ // A request to read 0 bytes from a stream is a no-op.
+ if(buf_size == 0 || buffer_bytes(in_->b.data()) > 0)
+ {
+ lock.unlock();
+ (*op)(ec);
+ return;
+ }
+
+ // deliver error
+ if(in_->code != status::ok)
+ {
+ lock.unlock();
+ (*op)(net::error::eof);
+ return;
+ }
+
+ // complete when bytes available or closed
+ in_->op = std::move(op);
+}
+
+stream::
+state::
+state(
+ net::io_context& ioc_,
+ boost::weak_ptr<service_impl> wp_,
+ fail_count* fc_)
+ : ioc(ioc_)
+ , wp(std::move(wp_))
+ , fc(fc_)
+{
+}
+
+stream::
+state::
+~state()
+{
+ // cancel outstanding read
+ if(op != nullptr)
+ (*op)(net::error::operation_aborted);
+}
+
+void
+stream::
+state::
+remove() noexcept
+{
+ auto sp = wp.lock();
+
+ // If this goes off, it means the lifetime of a test::stream object
+ // extended beyond the lifetime of the associated execution context.
+ BOOST_ASSERT(sp);
+
+ sp->remove(*this);
+}
+
+void
+stream::
+state::
+notify_read()
+{
+ if(op)
+ {
+ auto op_ = std::move(op);
+ op_->operator()(error_code{});
+ }
+ else
+ {
+ cv.notify_all();
+ }
+}
+
+void
+stream::
+state::
+cancel_read()
+{
+ std::unique_ptr<read_op_base> p;
+ {
+ std::lock_guard<std::mutex> lock(m);
+ code = status::eof;
+ p = std::move(op);
+ }
+ if(p != nullptr)
+ (*p)(net::error::operation_aborted);
+}
+
+//------------------------------------------------------------------------------
+
+stream::
+~stream()
+{
+ close();
+ in_->remove();
+}
+
+stream::
+stream(stream&& other)
+{
+ auto in = service::make_impl(
+ other.in_->ioc, other.in_->fc);
+ in_ = std::move(other.in_);
+ out_ = std::move(other.out_);
+ other.in_ = in;
+}
+
+stream&
+stream::
+operator=(stream&& other)
+{
+ close();
+ auto in = service::make_impl(
+ other.in_->ioc, other.in_->fc);
+ in_->remove();
+ in_ = std::move(other.in_);
+ out_ = std::move(other.out_);
+ other.in_ = in;
+ return *this;
+}
+
+//------------------------------------------------------------------------------
+
+stream::
+stream(net::io_context& ioc)
+ : in_(service::make_impl(ioc, nullptr))
+{
+}
+
+stream::
+stream(
+ net::io_context& ioc,
+ fail_count& fc)
+ : in_(service::make_impl(ioc, &fc))
+{
+}
+
+stream::
+stream(
+ net::io_context& ioc,
+ string_view s)
+ : in_(service::make_impl(ioc, nullptr))
+{
+ in_->b.commit(net::buffer_copy(
+ in_->b.prepare(s.size()),
+ net::buffer(s.data(), s.size())));
+}
+
+stream::
+stream(
+ net::io_context& ioc,
+ fail_count& fc,
+ string_view s)
+ : in_(service::make_impl(ioc, &fc))
+{
+ in_->b.commit(net::buffer_copy(
+ in_->b.prepare(s.size()),
+ net::buffer(s.data(), s.size())));
+}
+
+void
+stream::
+connect(stream& remote)
+{
+ BOOST_ASSERT(! out_.lock());
+ BOOST_ASSERT(! remote.out_.lock());
+ out_ = remote.in_;
+ remote.out_ = in_;
+ in_->code = status::ok;
+ remote.in_->code = status::ok;
+}
+
+string_view
+stream::
+str() const
+{
+ auto const bs = in_->b.data();
+ if(buffer_bytes(bs) == 0)
+ return {};
+ auto const b = beast::buffers_front(bs);
+ return {static_cast<char const*>(b.data()), b.size()};
+}
+
+void
+stream::
+append(string_view s)
+{
+ std::lock_guard<std::mutex> lock{in_->m};
+ in_->b.commit(net::buffer_copy(
+ in_->b.prepare(s.size()),
+ net::buffer(s.data(), s.size())));
+}
+
+void
+stream::
+clear()
+{
+ std::lock_guard<std::mutex> lock{in_->m};
+ in_->b.consume(in_->b.size());
+}
+
+void
+stream::
+close()
+{
+ in_->cancel_read();
+
+ // disconnect
+ {
+ auto out = out_.lock();
+ out_.reset();
+
+ // notify peer
+ if(out)
+ {
+ std::lock_guard<std::mutex> lock(out->m);
+ if(out->code == status::ok)
+ {
+ out->code = status::eof;
+ out->notify_read();
+ }
+ }
+ }
+}
+
+void
+stream::
+close_remote()
+{
+ std::lock_guard<std::mutex> lock{in_->m};
+ if(in_->code == status::ok)
+ {
+ in_->code = status::eof;
+ in_->notify_read();
+ }
+}
+
+void
+teardown(
+ role_type,
+ stream& s,
+ boost::system::error_code& ec)
+{
+ if( s.in_->fc &&
+ s.in_->fc->fail(ec))
+ return;
+
+ s.close();
+
+ if( s.in_->fc &&
+ s.in_->fc->fail(ec))
+ ec = net::error::eof;
+ else
+ ec = {};
+}
+
+//------------------------------------------------------------------------------
+
+stream
+connect(stream& to)
+{
+ stream from{to.get_executor().context()};
+ from.connect(to);
+ return from;
+}
+
+void
+connect(stream& s1, stream& s2)
+{
+ s1.connect(s2);
+}
+
+} // test
+} // beast
+} // boost
+
+#endif
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