ceph/src/boost/libs/thread/test/sync/mutual_exclusion/null_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/null_mutex.hpp>
  16
  17 // class null_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/null_mutex.hpp>
  23 #include <boost/thread/thread.hpp>
  24 #include <boost/detail/lightweight_test.hpp>
  25
  26 #if defined BOOST_THREAD_USES_CHRONO
  27
  28
  29 boost::null_mutex m;
  30
  31 typedef boost::chrono::steady_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
  37 #ifdef BOOST_THREAD_PLATFORM_WIN32
  38 const ms max_diff(250);
  39 #else
  40 const ms max_diff(50);
  41 #endif
  42
  43 void f1()
  44 {
  45   time_point t0 = Clock::now();
  46   BOOST_TEST(m.try_lock_for(ms(250)) == true);
  47   time_point t1 = Clock::now();
  48   BOOST_TEST(m.try_lock());
  49   m.unlock();
  50   m.unlock();
  51   ns d = t1 - t0 ;
  52   BOOST_TEST(d < max_diff);
  53 }
  54
  55
  56 int main()
  57 {
  58   {
  59     m.lock();
  60     boost::thread t(f1);
  61     m.unlock();
  62     t.join();
  63   }
  64
  65   return boost::report_errors();
  66 }
  67
  68 #else
  69 #error "Test not applicable: BOOST_THREAD_USES_CHRONO not defined for this platform as not supported"
  70 #endif
  71