ceph/src/boost/libs/thread/test/sync/mutual_exclusion/locks/shared_lock/cons/duration_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/locks.hpp>
  16
  17 // template <class Mutex> class shared_lock;
  18
  19 // template <class Rep, class Period>
  20 //   shared_lock(mutex_type& m, const chrono::duration<Rep, Period>& rel_time);
  21
  22 #include <boost/thread/lock_types.hpp>
  23 #include <boost/thread/shared_mutex.hpp>
  24 #include <boost/thread/thread.hpp>
  25 #include <boost/detail/lightweight_test.hpp>
  26 #include <boost/chrono/chrono_io.hpp>
  27
  28 boost::shared_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::shared_lock<boost::shared_mutex> lk(m, ms(300)+ms(1000));
  41   BOOST_TEST(lk.owns_lock() == true);
  42   time_point t1 = Clock::now();
  43   ns d = t1 - t0 - ms(250);
  44   // This test is spurious as it depends on the time the thread system switches the threads
  45   BOOST_TEST(d < ns(5000000)+ms(1000)); // within 5ms
  46 }
  47
  48 void f2()
  49 {
  50   time_point t0 = Clock::now();
  51   boost::shared_lock<boost::shared_mutex> lk(m, ms(250));
  52   BOOST_TEST(lk.owns_lock() == false);
  53   time_point t1 = Clock::now();
  54   ns d = t1 - t0 - ms(250);
  55   // This test is spurious as it depends on the time the thread system switches the threads
  56   BOOST_TEST(d < ns(5000000)+ms(1000)); // within 5ms
  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     // This test is spurious as it depends on the time the thread system switches the threads
  72     boost::this_thread::sleep_for(ms(300)+ms(1000));
  73     m.unlock();
  74     t.join();
  75   }
  76
  77   return boost::report_errors();
  78 }
  79