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

   1 //
   2 // detail/io_uring_operation.hpp
   3 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   4 //
   5 // Copyright (c) 2003-2022 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_IO_URING_OPERATION_HPP
  12 #define BOOST_ASIO_DETAIL_IO_URING_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_IO_URING)
  21
  22 #include <liburing.h>
  23 #include <boost/asio/detail/cstdint.hpp>
  24 #include <boost/asio/detail/operation.hpp>
  25
  26 #include <boost/asio/detail/push_options.hpp>
  27
  28 namespace boost {
  29 namespace asio {
  30 namespace detail {
  31
  32 class io_uring_operation
  33   : public operation
  34 {
  35 public:
  36   // The error code to be passed to the completion handler.
  37   boost::system::error_code ec_;
  38
  39   // The number of bytes transferred, to be passed to the completion handler.
  40   std::size_t bytes_transferred_;
  41
  42   // The operation key used for targeted cancellation.
  43   void* cancellation_key_;
  44
  45   // Prepare the operation.
  46   void prepare(::io_uring_sqe* sqe)
  47   {
  48     return prepare_func_(this, sqe);
  49   }
  50
  51   // Perform actions associated with the operation. Returns true when complete.
  52   bool perform(bool after_completion)
  53   {
  54     return perform_func_(this, after_completion);
  55   }
  56
  57 protected:
  58   typedef void (*prepare_func_type)(io_uring_operation*, ::io_uring_sqe*);
  59   typedef bool (*perform_func_type)(io_uring_operation*, bool);
  60
  61   io_uring_operation(const boost::system::error_code& success_ec,
  62       prepare_func_type prepare_func, perform_func_type perform_func,
  63       func_type complete_func)
  64     : operation(complete_func),
  65       ec_(success_ec),
  66       bytes_transferred_(0),
  67       cancellation_key_(0),
  68       prepare_func_(prepare_func),
  69       perform_func_(perform_func)
  70   {
  71   }
  72
  73 private:
  74   prepare_func_type prepare_func_;
  75   perform_func_type perform_func_;
  76 };
  77
  78 } // namespace detail
  79 } // namespace asio
  80 } // namespace boost
  81
  82 #include <boost/asio/detail/pop_options.hpp>
  83
  84 #endif // defined(BOOST_ASIO_HAS_IO_URING)
  85
  86 #endif // BOOST_ASIO_DETAIL_IO_URING_OPERATION_HPP