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//
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// detail/task_io_service_operation.hpp
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// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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//
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// Copyright (c) 2003-2015 Christopher M. Kohlhoff (chris at kohlhoff 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 BOOST_ASIO_DETAIL_TASK_IO_SERVICE_OPERATION_HPP
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#define BOOST_ASIO_DETAIL_TASK_IO_SERVICE_OPERATION_HPP
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#if defined(_MSC_VER) && (_MSC_VER >= 1200)
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# pragma once
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#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
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#include <boost/system/error_code.hpp>
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#include <boost/asio/detail/handler_tracking.hpp>
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#include <boost/asio/detail/op_queue.hpp>
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#include <boost/asio/detail/push_options.hpp>
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namespace boost {
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namespace asio {
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namespace detail {
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class task_io_service;
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// Base class for all operations. A function pointer is used instead of virtual
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// functions to avoid the associated overhead.
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class task_io_service_operation BOOST_ASIO_INHERIT_TRACKED_HANDLER
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{
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public:
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  void complete(task_io_service& owner,
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      const boost::system::error_code& ec, std::size_t bytes_transferred)
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  {
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    func_(&owner, this, ec, bytes_transferred);
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  }
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  void destroy()
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  {
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    func_(0, this, boost::system::error_code(), 0);
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  }
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protected:
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  typedef void (*func_type)(task_io_service*,
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      task_io_service_operation*,
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      const boost::system::error_code&, std::size_t);
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  task_io_service_operation(func_type func)
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    : next_(0),
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      func_(func),
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      task_result_(0)
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  {
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  }
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  // Prevents deletion through this type.
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  ~task_io_service_operation()
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  {
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  }
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private:
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  friend class op_queue_access;
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  task_io_service_operation* next_;
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  func_type func_;
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protected:
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  friend class task_io_service;
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  unsigned int task_result_; // Passed into bytes transferred.
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};
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} // namespace detail
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} // namespace asio
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} // namespace boost
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#include <boost/asio/detail/pop_options.hpp>
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#endif // BOOST_ASIO_DETAIL_TASK_IO_SERVICE_OPERATION_HPP