ceph/src/boost/libs/asio/example/cpp03/tutorial/timer3/timer.cpp

   1 //
   2 // timer.cpp
   3 // ~~~~~~~~~
   4 //
   5 // Copyright (c) 2003-2019 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 #include <iostream>
  12 #include <boost/asio.hpp>
  13 #include <boost/bind.hpp>
  14
  15 void print(const boost::system::error_code& /*e*/,
  16     boost::asio::steady_timer* t, int* count)
  17 {
  18   if (*count < 5)
  19   {
  20     std::cout << *count << std::endl;
  21     ++(*count);
  22
  23     t->expires_at(t->expiry() + boost::asio::chrono::seconds(1));
  24     t->async_wait(boost::bind(print,
  25           boost::asio::placeholders::error, t, count));
  26   }
  27 }
  28
  29 int main()
  30 {
  31   boost::asio::io_context io;
  32
  33   int count = 0;
  34   boost::asio::steady_timer t(io, boost::asio::chrono::seconds(1));
  35   t.async_wait(boost::bind(print,
  36         boost::asio::placeholders::error, &t, &count));
  37
  38   io.run();
  39
  40   std::cout << "Final count is " << count << std::endl;
  41
  42   return 0;
  43 }