// // detail/win_iocp_operation.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_WIN_IOCP_OPERATION_HPP #define BOOST_ASIO_DETAIL_WIN_IOCP_OPERATION_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_ASIO_HAS_IOCP) #include <boost/asio/detail/op_queue.hpp> #include <boost/asio/detail/win_iocp_io_service_fwd.hpp> #include <boost/system/error_code.hpp> #include <boost/asio/detail/push_options.hpp> namespace boost { namespace asio { namespace detail { // Base class for all operations. A function pointer is used instead of virtual // functions to avoid the associated overhead. class win_iocp_operation : public OVERLAPPED { public: void complete(win_iocp_io_service& owner, const boost::system::error_code& ec = boost::system::error_code(), std::size_t bytes_transferred = 0) { func_(&owner, this, ec, bytes_transferred); } void destroy() { func_(0, this, boost::system::error_code(), 0); } protected: typedef void (*func_type)(win_iocp_io_service*, win_iocp_operation*, boost::system::error_code, std::size_t); win_iocp_operation(func_type func) : next_(0), func_(func) { reset(); } // Prevents deletion through this type. ~win_iocp_operation() { } void reset() { Internal = 0; InternalHigh = 0; Offset = 0; OffsetHigh = 0; hEvent = 0; ready_ = 0; } private: friend class op_queue_access; friend class win_iocp_io_service; win_iocp_operation* next_; func_type func_; long ready_; }; } // namespace detail } // namespace asio } // namespace boost #include <boost/asio/detail/pop_options.hpp> #endif // defined(BOOST_ASIO_HAS_IOCP) #endif // BOOST_ASIO_DETAIL_WIN_IOCP_OPERATION_HPP