ceph/src/boost/libs/thread/test/sync/mutual_exclusion/timed_mutex/try_lock_until_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
  10 // Copyright (C) 2011 Vicente J. Botet Escriba
  11 //
  12 //  Distributed under the Boost Software License, Version 1.0. (See accompanying
  13 //  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
  14
  15 // <boost/thread/timed_mutex.hpp>
  16
  17 // class timed_mutex;
  18
  19 // template <class Clock, class Duration>
  20 //     bool try_lock_until(const chrono::time_point<Clock, Duration>& abs_time);
  21
  22 #include <boost/thread/mutex.hpp>
  23 #include <boost/thread/thread.hpp>
  24 #include <boost/detail/lightweight_test.hpp>
  25
  26 #if defined BOOST_THREAD_USES_CHRONO
  27
  28 boost::timed_mutex m;
  29
  30 typedef boost::chrono::steady_clock Clock;
  31 typedef Clock::time_point time_point;
  32 typedef Clock::duration duration;
  33 typedef boost::chrono::milliseconds ms;
  34 typedef boost::chrono::nanoseconds ns;
  35
  36 void f1()
  37 {
  38   time_point t0 = Clock::now();
  39   // This test is spurious as it depends on the time the thread system switches the threads
  40   BOOST_TEST(m.try_lock_until(Clock::now() + ms(300) + ms(1000)) == true);
  41   time_point t1 = Clock::now();
  42   m.unlock();
  43   ns d = t1 - t0 - ms(250);
  44   BOOST_TEST(d < ns(5000000)+ms(1000)); // within 5ms
  45 }
  46
  47 void f2()
  48 {
  49   time_point t0 = Clock::now();
  50   BOOST_TEST(m.try_lock_until(Clock::now() + ms(250)) == false);
  51   time_point t1 = Clock::now();
  52   ns d = t1 - t0 - ms(250);
  53   // This test is spurious as it depends on the time the thread system switches the threads
  54   BOOST_TEST(d < ns(5000000)+ms(1000)); // within 5ms
  55 }
  56
  57 int main()
  58 {
  59   {
  60     m.lock();
  61     boost::thread t(f1);
  62     boost::this_thread::sleep_for(ms(250));
  63     m.unlock();
  64     t.join();
  65   }
  66   {
  67     m.lock();
  68     boost::thread t(f2);
  69     boost::this_thread::sleep_for(ms(300)+ms(1000));
  70     m.unlock();
  71     t.join();
  72   }
  73
  74   return boost::report_errors();
  75 }
  76
  77 #else
  78 #error "Test not applicable: BOOST_THREAD_USES_CHRONO not defined for this platform as not supported"
  79 #endif
  80