Function system_timer_test

test/system_timer.cpp:79–222

}

void system_timer_test()
{
  using boost::asio::chrono::seconds;
  using boost::asio::chrono::microseconds;
  using bindns::placeholders::_1;
  using bindns::placeholders::_2;

  boost::asio::io_context ioc;
  const boost::asio::io_context::executor_type ioc_ex = ioc.get_executor();
  int count = 0;

  boost::asio::system_timer::time_point start = now();

  boost::asio::system_timer t1(ioc, seconds(1));
  t1.wait();

  // The timer must block until after its expiry time.
  boost::asio::system_timer::time_point end = now();
  boost::asio::system_timer::time_point expected_end = start + seconds(1);
  BOOST_ASIO_CHECK(expected_end < end || expected_end == end);

  start = now();

  boost::asio::system_timer t2(ioc_ex, seconds(1) + microseconds(500000));
  t2.wait();

  // The timer must block until after its expiry time.
  end = now();
  expected_end = start + seconds(1) + microseconds(500000);
  BOOST_ASIO_CHECK(expected_end < end || expected_end == end);

  t2.expires_at(t2.expiry() + seconds(1));
  t2.wait();

  // The timer must block until after its expiry time.
  end = now();
  expected_end += seconds(1);
  BOOST_ASIO_CHECK(expected_end < end || expected_end == end);

  start = now();

  t2.expires_after(seconds(1) + microseconds(200000));
  t2.wait();

  // The timer must block until after its expiry time.
  end = now();
  expected_end = start + seconds(1) + microseconds(200000);
  BOOST_ASIO_CHECK(expected_end < end || expected_end == end);

  start = now();

  boost::asio::system_timer t3(ioc, seconds(5));
  t3.async_wait(bindns::bind(increment, &count));

  // No completions can be delivered until run() is called.
  BOOST_ASIO_CHECK(count == 0);

  ioc.run();