ceph/src/boost/libs/thread/test/sync/mutual_exclusion/shared_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) 2012 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/shared_mutex.hpp>
  16
  17 // class shared_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/shared_mutex.hpp>
  23 #include <boost/thread/thread.hpp>
  24 #include <boost/detail/lightweight_test.hpp>
  25
  26 boost::shared_mutex m;
  27
  28 typedef boost::chrono::steady_clock Clock;
  29 typedef Clock::time_point time_point;
  30 typedef Clock::duration duration;
  31 typedef boost::chrono::milliseconds ms;
  32 typedef boost::chrono::nanoseconds ns;
  33
  34 void f1()
  35 {
  36   time_point t0 = Clock::now();
  37   // This test is spurious as it depends on the time the thread system switches the threads
  38   BOOST_TEST(m.try_lock_until(Clock::now() + ms(300) + ms(1000)) == true);
  39   time_point t1 = Clock::now();
  40   m.unlock();
  41   ns d = t1 - t0 - ms(250);
  42   BOOST_TEST(d < ns(5000000)+ms(1000)); // within 5ms
  43 }
  44
  45 void f2()
  46 {
  47   time_point t0 = Clock::now();
  48   BOOST_TEST(m.try_lock_until(Clock::now() + ms(250)) == false);
  49   time_point t1 = Clock::now();
  50   ns d = t1 - t0 - ms(250);
  51   // This test is spurious as it depends on the time the thread system switches the threads
  52   BOOST_TEST(d < ns(5000000)+ms(1000)); // within 5ms
  53 }
  54
  55 int main()
  56 {
  57   {
  58     m.lock();
  59     boost::thread t(f1);
  60     boost::this_thread::sleep_for(ms(250));
  61     m.unlock();
  62     t.join();
  63   }
  64   {
  65     m.lock();
  66     boost::thread t(f2);
  67     boost::this_thread::sleep_for(ms(300));
  68     m.unlock();
  69     t.join();
  70   }
  71
  72   return boost::report_errors();
  73 }
  74