ceph/src/boost/libs/thread/test/threads/this_thread/sleep_for/sleep_for_pass.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is dual licensed under the MIT and the University of Illinois Open
   6 // Source Licenses. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 // Copyright (C) 2011 Vicente J. Botet Escriba
  10 //
  11 //  Distributed under the Boost Software License, Version 1.0. (See accompanying
  12 //  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
  13
  14 // <boost/thread/thread.hpp>
  15
  16 // thread::id this_thread::get_id();
  17
  18 #include <boost/thread/thread_only.hpp>
  19 #include <cstdlib>
  20 #include <algorithm>
  21
  22 #include <boost/detail/lightweight_test.hpp>
  23
  24 #if defined BOOST_THREAD_USES_CHRONO
  25
  26 int main()
  27 {
  28   {
  29     typedef boost::chrono::system_clock Clock;
  30     typedef Clock::time_point time_point;
  31     boost::chrono::milliseconds ms(500);
  32     time_point t0 = Clock::now();
  33     boost::this_thread::sleep_for(ms);
  34     time_point t1 = Clock::now();
  35     boost::chrono::nanoseconds ns = (t1 - t0) - ms;
  36     boost::chrono::nanoseconds err = ms / 100;
  37     // The time slept is within 1% of 500ms
  38     // This test is spurious as it depends on the time the thread system switches the threads
  39     BOOST_TEST((std::max)(ns.count(), -ns.count()) < (err+boost::chrono::milliseconds(1000)).count());
  40     //BOOST_TEST(std::abs(static_cast<long>(ns.count())) < (err+boost::chrono::milliseconds(1000)).count());
  41   }
  42   {
  43     typedef boost::chrono::system_clock Clock;
  44     typedef Clock::time_point time_point;
  45     boost::chrono::milliseconds ms(500);
  46     time_point t0 = Clock::now();
  47     boost::this_thread::no_interruption_point::sleep_for(ms);
  48     time_point t1 = Clock::now();
  49     boost::chrono::nanoseconds ns = (t1 - t0) - ms;
  50     boost::chrono::nanoseconds err = ms / 100;
  51     // The time slept is within 1% of 500ms
  52     // This test is spurious as it depends on the time the thread system switches the threads
  53     BOOST_TEST((std::max)(ns.count(), -ns.count()) < (err+boost::chrono::milliseconds(1000)).count());
  54     //BOOST_TEST(std::abs(static_cast<long>(ns.count())) < (err+boost::chrono::milliseconds(1000)).count());
  55   }
  56   return boost::report_errors();
  57
  58 }
  59
  60 #else
  61 #error "Test not applicable: BOOST_THREAD_USES_CHRONO not defined for this platform as not supported"
  62 #endif
  63