ceph/src/boost/boost/asio/detail/win_iocp_operation.hpp

   1 //
   2 // detail/win_iocp_operation.hpp
   3 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   4 //
   5 // Copyright (c) 2003-2017 Christopher M. Kohlhoff (chris at kohlhoff dot com)
   6 //
   7 // Distributed under the Boost Software License, Version 1.0. (See accompanying
   8 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   9 //
  10
  11 #ifndef BOOST_ASIO_DETAIL_WIN_IOCP_OPERATION_HPP
  12 #define BOOST_ASIO_DETAIL_WIN_IOCP_OPERATION_HPP
  13
  14 #if defined(_MSC_VER) && (_MSC_VER >= 1200)
  15 # pragma once
  16 #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
  17
  18 #include <boost/asio/detail/config.hpp>
  19
  20 #if defined(BOOST_ASIO_HAS_IOCP)
  21
  22 #include <boost/asio/detail/handler_tracking.hpp>
  23 #include <boost/asio/detail/op_queue.hpp>
  24 #include <boost/asio/detail/socket_types.hpp>
  25 #include <boost/system/error_code.hpp>
  26
  27 #include <boost/asio/detail/push_options.hpp>
  28
  29 namespace boost {
  30 namespace asio {
  31 namespace detail {
  32
  33 class win_iocp_io_context;
  34
  35 // Base class for all operations. A function pointer is used instead of virtual
  36 // functions to avoid the associated overhead.
  37 class win_iocp_operation
  38   : public OVERLAPPED
  39     BOOST_ASIO_ALSO_INHERIT_TRACKED_HANDLER
  40 {
  41 public:
  42   typedef win_iocp_operation operation_type;
  43
  44   void complete(void* owner, const boost::system::error_code& ec,
  45       std::size_t bytes_transferred)
  46   {
  47     func_(owner, this, ec, bytes_transferred);
  48   }
  49
  50   void destroy()
  51   {
  52     func_(0, this, boost::system::error_code(), 0);
  53   }
  54
  55 protected:
  56   typedef void (*func_type)(
  57       void*, win_iocp_operation*,
  58       const boost::system::error_code&, std::size_t);
  59
  60   win_iocp_operation(func_type func)
  61     : next_(0),
  62       func_(func)
  63   {
  64     reset();
  65   }
  66
  67   // Prevents deletion through this type.
  68   ~win_iocp_operation()
  69   {
  70   }
  71
  72   void reset()
  73   {
  74     Internal = 0;
  75     InternalHigh = 0;
  76     Offset = 0;
  77     OffsetHigh = 0;
  78     hEvent = 0;
  79     ready_ = 0;
  80   }
  81
  82 private:
  83   friend class op_queue_access;
  84   friend class win_iocp_io_context;
  85   win_iocp_operation* next_;
  86   func_type func_;
  87   long ready_;
  88 };
  89
  90 } // namespace detail
  91 } // namespace asio
  92 } // namespace boost
  93
  94 #include <boost/asio/detail/pop_options.hpp>
  95
  96 #endif // defined(BOOST_ASIO_HAS_IOCP)
  97
  98 #endif // BOOST_ASIO_DETAIL_WIN_IOCP_OPERATION_HPP