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50b5dab5df
Conform to the Networking TS by renaming the Streambuf concept to DynamicBuffer in all places. Values of types meeting the requirements of DynamicBuffer are renamed to dynabuf. See: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2015/n4478.html#requirements.dynamic_buffers * Headers renamed * Formal parameter names renamed * Template argument types renamed * Documentation updated
143 lines
3.3 KiB
C++
143 lines
3.3 KiB
C++
//
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// Copyright (c) 2013-2016 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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#ifndef BEAST_WEBSOCKET_IMPL_READ_OP_HPP
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#define BEAST_WEBSOCKET_IMPL_READ_OP_HPP
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#include <beast/core/handler_alloc.hpp>
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#include <memory>
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namespace beast {
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namespace websocket {
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// read an entire message
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//
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template<class NextLayer>
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template<class DynamicBuffer, class Handler>
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class stream<NextLayer>::read_op
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{
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using alloc_type =
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handler_alloc<char, Handler>;
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struct data
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{
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stream<NextLayer>& ws;
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opcode& op;
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DynamicBuffer& db;
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Handler h;
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frame_info fi;
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bool cont;
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int state = 0;
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template<class DeducedHandler>
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data(DeducedHandler&& h_,
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stream<NextLayer>& ws_, opcode& op_,
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DynamicBuffer& sb_)
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: ws(ws_)
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, op(op_)
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, db(sb_)
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, h(std::forward<DeducedHandler>(h_))
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, cont(boost_asio_handler_cont_helpers::
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is_continuation(h))
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{
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}
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};
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std::shared_ptr<data> d_;
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public:
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read_op(read_op&&) = default;
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read_op(read_op const&) = default;
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template<class DeducedHandler, class... Args>
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read_op(DeducedHandler&& h,
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stream<NextLayer>& ws, Args&&... args)
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: d_(std::allocate_shared<data>(alloc_type{h},
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std::forward<DeducedHandler>(h), ws,
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std::forward<Args>(args)...))
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{
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(*this)(error_code{}, false);
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}
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void operator()(
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error_code const& ec, bool again = true);
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friend
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void* asio_handler_allocate(
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std::size_t size, read_op* op)
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{
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return boost_asio_handler_alloc_helpers::
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allocate(size, op->d_->h);
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}
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friend
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void asio_handler_deallocate(
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void* p, std::size_t size, read_op* op)
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{
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return boost_asio_handler_alloc_helpers::
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deallocate(p, size, op->d_->h);
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}
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friend
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bool asio_handler_is_continuation(read_op* op)
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{
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return op->d_->cont;
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}
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template <class Function>
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friend
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void asio_handler_invoke(Function&& f, read_op* op)
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{
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return boost_asio_handler_invoke_helpers::
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invoke(f, op->d_->h);
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}
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};
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template<class NextLayer>
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template<class DynamicBuffer, class Handler>
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void
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stream<NextLayer>::read_op<DynamicBuffer, Handler>::
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operator()(error_code const& ec, bool again)
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{
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auto& d = *d_;
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d.cont = d.cont || again;
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while(! ec)
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{
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switch(d.state)
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{
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case 0:
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// read payload
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d.state = 1;
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#if 0
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// VFALCO This causes dereference of null, because
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// the handler is moved from the data block
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// before asio_handler_deallocate is called.
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d.ws.async_read_frame(
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d.fi, d.db, std::move(*this));
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#else
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d.ws.async_read_frame(d.fi, d.db, *this);
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#endif
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return;
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// got payload
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case 1:
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d.op = d.fi.op;
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if(d.fi.fin)
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goto upcall;
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d.state = 0;
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break;
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}
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}
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upcall:
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d.h(ec);
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}
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} // websocket
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} // beast
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#endif
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