// | |
// detail/descriptor_write_op.hpp | |
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
// | |
// Copyright (c) 2003-2011 Christopher M. Kohlhoff (chris at kohlhoff 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) | |
// | |
#ifndef BOOST_ASIO_DETAIL_DESCRIPTOR_WRITE_OP_HPP | |
#define BOOST_ASIO_DETAIL_DESCRIPTOR_WRITE_OP_HPP | |
#if defined(_MSC_VER) && (_MSC_VER >= 1200) | |
# pragma once | |
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200) | |
#include <boost/asio/detail/config.hpp> | |
#if !defined(BOOST_WINDOWS) && !defined(__CYGWIN__) | |
#include <boost/utility/addressof.hpp> | |
#include <boost/asio/detail/bind_handler.hpp> | |
#include <boost/asio/detail/buffer_sequence_adapter.hpp> | |
#include <boost/asio/detail/descriptor_ops.hpp> | |
#include <boost/asio/detail/fenced_block.hpp> | |
#include <boost/asio/detail/reactor_op.hpp> | |
#include <boost/asio/detail/push_options.hpp> | |
namespace boost { | |
namespace asio { | |
namespace detail { | |
template <typename ConstBufferSequence> | |
class descriptor_write_op_base : public reactor_op | |
{ | |
public: | |
descriptor_write_op_base(int descriptor, | |
const ConstBufferSequence& buffers, func_type complete_func) | |
: reactor_op(&descriptor_write_op_base::do_perform, complete_func), | |
descriptor_(descriptor), | |
buffers_(buffers) | |
{ | |
} | |
static bool do_perform(reactor_op* base) | |
{ | |
descriptor_write_op_base* o(static_cast<descriptor_write_op_base*>(base)); | |
buffer_sequence_adapter<boost::asio::const_buffer, | |
ConstBufferSequence> bufs(o->buffers_); | |
return descriptor_ops::non_blocking_write(o->descriptor_, | |
bufs.buffers(), bufs.count(), o->ec_, o->bytes_transferred_); | |
} | |
private: | |
int descriptor_; | |
ConstBufferSequence buffers_; | |
}; | |
template <typename ConstBufferSequence, typename Handler> | |
class descriptor_write_op | |
: public descriptor_write_op_base<ConstBufferSequence> | |
{ | |
public: | |
BOOST_ASIO_DEFINE_HANDLER_PTR(descriptor_write_op); | |
descriptor_write_op(int descriptor, | |
const ConstBufferSequence& buffers, Handler handler) | |
: descriptor_write_op_base<ConstBufferSequence>( | |
descriptor, buffers, &descriptor_write_op::do_complete), | |
handler_(handler) | |
{ | |
} | |
static void do_complete(io_service_impl* owner, operation* base, | |
boost::system::error_code /*ec*/, std::size_t /*bytes_transferred*/) | |
{ | |
// Take ownership of the handler object. | |
descriptor_write_op* o(static_cast<descriptor_write_op*>(base)); | |
ptr p = { boost::addressof(o->handler_), o, o }; | |
// Make a copy of the handler so that the memory can be deallocated before | |
// the upcall is made. Even if we're not about to make an upcall, a | |
// sub-object of the handler may be the true owner of the memory associated | |
// with the handler. Consequently, a local copy of the handler is required | |
// to ensure that any owning sub-object remains valid until after we have | |
// deallocated the memory here. | |
detail::binder2<Handler, boost::system::error_code, std::size_t> | |
handler(o->handler_, o->ec_, o->bytes_transferred_); | |
p.h = boost::addressof(handler.handler_); | |
p.reset(); | |
// Make the upcall if required. | |
if (owner) | |
{ | |
boost::asio::detail::fenced_block b; | |
boost_asio_handler_invoke_helpers::invoke(handler, handler.handler_); | |
} | |
} | |
private: | |
Handler handler_; | |
}; | |
} // namespace detail | |
} // namespace asio | |
} // namespace boost | |
#include <boost/asio/detail/pop_options.hpp> | |
#endif // !defined(BOOST_WINDOWS) && !defined(__CYGWIN__) | |
#endif // BOOST_ASIO_DETAIL_DESCRIPTOR_WRITE_OP_HPP |