ceph/src/boost/libs/thread/test/sync/mutual_exclusion/locks/lock_guard/default_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 lock_guard;
  18
  19 // lock_guard(Mutex &);
  20
  21 #include <boost/thread/lock_guard.hpp>
  22 #include <boost/thread/mutex.hpp>
  23 #include <boost/thread/thread.hpp>
  24 #include <boost/detail/lightweight_test.hpp>
  25
  26 #ifdef BOOST_THREAD_USES_CHRONO
  27 typedef boost::chrono::high_resolution_clock Clock;
  28 typedef Clock::time_point time_point;
  29 typedef Clock::duration duration;
  30 typedef boost::chrono::milliseconds ms;
  31 typedef boost::chrono::nanoseconds ns;
  32 #endif
  33
  34 boost::mutex m;
  35
  36 void f()
  37 {
  38 #ifdef BOOST_THREAD_USES_CHRONO
  39   time_point t0 = Clock::now();
  40   time_point t1;
  41   {
  42     boost::lock_guard<boost::mutex> lg(m);
  43     t1 = Clock::now();
  44   }
  45   ns d = t1 - t0 - ms(250);
  46   // This test is spurious as it depends on the time the thread system switches the threads
  47   BOOST_TEST(d < ns(2500000)+ms(1000)); // within 2.5ms
  48 #else
  49   //time_point t0 = Clock::now();
  50   //time_point t1;
  51   {
  52     boost::lock_guard<boost::mutex> lg(m);
  53     //t1 = Clock::now();
  54   }
  55   //ns d = t1 - t0 - ms(250);
  56   // This test is spurious as it depends on the time the thread system switches the threads
  57   //BOOST_TEST(d < ns(2500000)+ms(1000)); // within 2.5ms
  58 #endif
  59 }
  60
  61 int main()
  62 {
  63   m.lock();
  64   boost::thread t(f);
  65 #ifdef BOOST_THREAD_USES_CHRONO
  66   boost::this_thread::sleep_for(ms(250));
  67 #endif
  68   m.unlock();
  69   t.join();
  70
  71   return boost::report_errors();
  72 }