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

   1 //
   2 // detail/scheduler_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_SCHEDULER_OPERATION_HPP
  12 #define BOOST_ASIO_DETAIL_SCHEDULER_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/system/error_code.hpp>
  19 #include <boost/asio/detail/handler_tracking.hpp>
  20 #include <boost/asio/detail/op_queue.hpp>
  21
  22 #include <boost/asio/detail/push_options.hpp>
  23
  24 namespace boost {
  25 namespace asio {
  26 namespace detail {
  27
  28 class scheduler;
  29
  30 // Base class for all operations. A function pointer is used instead of virtual
  31 // functions to avoid the associated overhead.
  32 class scheduler_operation BOOST_ASIO_INHERIT_TRACKED_HANDLER
  33 {
  34 public:
  35   typedef scheduler_operation operation_type;
  36
  37   void complete(void* owner, const boost::system::error_code& ec,
  38       std::size_t bytes_transferred)
  39   {
  40     func_(owner, this, ec, bytes_transferred);
  41   }
  42
  43   void destroy()
  44   {
  45     func_(0, this, boost::system::error_code(), 0);
  46   }
  47
  48 protected:
  49   typedef void (*func_type)(void*,
  50       scheduler_operation*,
  51       const boost::system::error_code&, std::size_t);
  52
  53   scheduler_operation(func_type func)
  54     : next_(0),
  55       func_(func),
  56       task_result_(0)
  57   {
  58   }
  59
  60   // Prevents deletion through this type.
  61   ~scheduler_operation()
  62   {
  63   }
  64
  65 private:
  66   friend class op_queue_access;
  67   scheduler_operation* next_;
  68   func_type func_;
  69 protected:
  70   friend class scheduler;
  71   unsigned int task_result_; // Passed into bytes transferred.
  72 };
  73
  74 } // namespace detail
  75 } // namespace asio
  76 } // namespace boost
  77
  78 #include <boost/asio/detail/pop_options.hpp>
  79
  80 #endif // BOOST_ASIO_DETAIL_SCHEDULER_OPERATION_HPP