ceph/src/boost/libs/thread/test/sync/mutual_exclusion/locks/nested_strict_lock/make_nested_strict_lock_pass.cpp

   1 // Copyright (C) 2011 Vicente J. Botet Escriba
   2 //
   3 //  Distributed under the Boost Software License, Version 1.0. (See accompanying
   4 //  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   5
   6 // <boost/thread/strict_lock.hpp>
   7
   8 // template <class Lockable>
   9 // strict_lock<Lockable> make_strict_lock(Lockable &);
  10
  11 #define BOOST_THREAD_VERSION 4
  12
  13 #include <boost/thread/lock_types.hpp>
  14 #include <boost/thread/strict_lock.hpp>
  15 #include <boost/thread/mutex.hpp>
  16 #include <boost/thread/thread.hpp>
  17
  18 #include <boost/detail/lightweight_test.hpp>
  19
  20 #ifdef BOOST_THREAD_USES_CHRONO
  21 typedef boost::chrono::high_resolution_clock Clock;
  22 typedef Clock::time_point time_point;
  23 typedef Clock::duration duration;
  24 typedef boost::chrono::milliseconds ms;
  25 typedef boost::chrono::nanoseconds ns;
  26 #endif
  27
  28 boost::mutex m;
  29
  30 #if ! defined(BOOST_NO_CXX11_AUTO_DECLARATIONS) && ! defined(BOOST_NO_CXX11_RVALUE_REFERENCES) && ! defined BOOST_THREAD_NO_MAKE_NESTED_STRICT_LOCK && defined BOOST_THREAD_USES_CHRONO
  31
  32 void f()
  33 {
  34   time_point t0 = Clock::now();
  35   time_point t1;
  36   boost::unique_lock<boost::mutex> lg(m);
  37   {
  38     const auto&& nlg = boost::make_nested_strict_lock(lg); (void)nlg;
  39     t1 = Clock::now();
  40   }
  41   ns d = t1 - t0 - ms(250);
  42   // This test is spurious as it depends on the time the thread system switches the threads
  43   BOOST_TEST(d < ns(2500000)+ms(1000)); // within 2.5ms
  44 }
  45 #endif
  46
  47 int main()
  48 {
  49
  50 #if ! defined(BOOST_NO_CXX11_AUTO_DECLARATIONS) && ! defined(BOOST_NO_CXX11_RVALUE_REFERENCES) && ! defined BOOST_THREAD_NO_MAKE_NESTED_STRICT_LOCK
  51   {
  52     m.lock();
  53     boost::thread t(f);
  54     boost::this_thread::sleep_for(ms(250));
  55     m.unlock();
  56     t.join();
  57   }
  58 #endif
  59   return boost::report_errors();
  60 }