ceph/src/boost/libs/thread/test/sync/mutual_exclusion/timed_mutex/try_lock_for_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 Rep, class Period>
  20 //     bool try_lock_for(const chrono::duration<Rep, Period>& rel_time);
  21
  22 #include <boost/thread/mutex.hpp>
  23 #include <boost/thread/thread.hpp>
  24 #include <boost/detail/lightweight_test.hpp>
  25 #include "../../../timming.hpp"
  26
  27 #if defined BOOST_THREAD_USES_CHRONO
  28
  29 boost::timed_mutex m;
  30
  31 typedef boost::chrono::high_resolution_clock Clock;
  32 typedef Clock::time_point time_point;
  33 typedef Clock::duration duration;
  34 typedef boost::chrono::milliseconds ms;
  35 typedef boost::chrono::nanoseconds ns;
  36 time_point t0;
  37 time_point t1;
  38
  39 const ms max_diff(BOOST_THREAD_TEST_TIME_MS);
  40
  41 void f1()
  42 {
  43   t0 = Clock::now();
  44   BOOST_TEST(m.try_lock_for(ms(750)) == true);
  45   t1 = Clock::now();
  46   m.unlock();
  47 }
  48
  49 void f2()
  50 {
  51   t0 = Clock::now();
  52   BOOST_TEST(m.try_lock_for(ms(250)) == false);
  53   t1 = Clock::now();
  54   ns d = t1 - t0 - ms(250);
  55   BOOST_THREAD_TEST_IT(d, ns(max_diff));
  56 }
  57
  58 int main()
  59 {
  60   {
  61     m.lock();
  62     boost::thread t(f1);
  63     time_point t2 = Clock::now();
  64     boost::this_thread::sleep_for(ms(250));
  65     time_point t3 = Clock::now();
  66     m.unlock();
  67     t.join();
  68
  69     ns sleep_time = t3 - t2;
  70     ns d_ns = t1 - t0 - sleep_time;
  71     ms d_ms = boost::chrono::duration_cast<boost::chrono::milliseconds>(d_ns);
  72     // BOOST_TEST_GE(d_ms.count(), 0);
  73     BOOST_THREAD_TEST_IT(d_ms, max_diff);
  74     BOOST_THREAD_TEST_IT(d_ns, ns(max_diff));
  75   }
  76   {
  77     m.lock();
  78     boost::thread t(f2);
  79     boost::this_thread::sleep_for(ms(750));
  80     m.unlock();
  81     t.join();
  82   }
  83
  84   return boost::report_errors();
  85 }
  86
  87 #else
  88 #error "Test not applicable: BOOST_THREAD_USES_CHRONO not defined for this platform as not supported"
  89 #endif
  90