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 #ifdef BOOST_THREAD_PLATFORM_WIN32
  35 const ms max_diff(250);
  36 #else
  37 const ms max_diff(75);
  38 #endif
  39
  40 void f1()
  41 {
  42   time_point t0 = Clock::now();
  43   BOOST_TEST(m.try_lock_until(Clock::now() + ms(750)) == true);
  44   time_point t1 = Clock::now();
  45   m.unlock();
  46   ns d = t1 - t0 - ms(250);
  47   BOOST_TEST(d < max_diff);
  48 }
  49
  50 void f2()
  51 {
  52   time_point t0 = Clock::now();
  53   BOOST_TEST(m.try_lock_until(Clock::now() + ms(250)) == false);
  54   time_point t1 = Clock::now();
  55   ns d = t1 - t0 - ms(250);
  56   BOOST_TEST(d < max_diff);
  57 }
  58
  59 int main()
  60 {
  61   {
  62     m.lock();
  63     boost::thread t(f1);
  64     boost::this_thread::sleep_for(ms(250));
  65     m.unlock();
  66     t.join();
  67   }
  68   {
  69     m.lock();
  70     boost::thread t(f2);
  71     boost::this_thread::sleep_for(ms(750));
  72     m.unlock();
  73     t.join();
  74   }
  75
  76   return boost::report_errors();
  77 }
  78