ceph/src/boost/libs/thread/test/sync/mutual_exclusion/timed_mutex/try_lock_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 // bool try_lock();
  20
  21 #include <boost/thread/mutex.hpp>
  22 #include <boost/thread/thread.hpp>
  23 #include <boost/detail/lightweight_test.hpp>
  24
  25
  26 boost::timed_mutex m;
  27
  28 #if defined BOOST_THREAD_USES_CHRONO
  29 typedef boost::chrono::system_clock Clock;
  30 typedef Clock::time_point time_point;
  31 typedef Clock::duration duration;
  32 typedef boost::chrono::milliseconds ms;
  33 typedef boost::chrono::nanoseconds ns;
  34 #else
  35 #endif
  36
  37 #ifdef BOOST_THREAD_PLATFORM_WIN32
  38 const ms max_diff(250);
  39 #else
  40 const ms max_diff(75);
  41 #endif
  42
  43 void f()
  44 {
  45 #if defined BOOST_THREAD_USES_CHRONO
  46   time_point t0 = Clock::now();
  47   BOOST_TEST(!m.try_lock());
  48   BOOST_TEST(!m.try_lock());
  49   BOOST_TEST(!m.try_lock());
  50   while (!m.try_lock())
  51     ;
  52   time_point t1 = Clock::now();
  53   m.unlock();
  54   ns d = t1 - t0 - ms(250);
  55   BOOST_TEST(d < max_diff);
  56 #else
  57   //time_point t0 = Clock::now();
  58   //BOOST_TEST(!m.try_lock());
  59   //BOOST_TEST(!m.try_lock());
  60   //BOOST_TEST(!m.try_lock());
  61   while (!m.try_lock())
  62     ;
  63   //time_point t1 = Clock::now();
  64   m.unlock();
  65   //ns d = t1 - t0 - ms(250);
  66   //BOOST_TEST(d < max_diff);
  67 #endif
  68 }
  69
  70 int main()
  71 {
  72   m.lock();
  73   boost::thread t(f);
  74 #if defined BOOST_THREAD_USES_CHRONO
  75   boost::this_thread::sleep_for(ms(250));
  76 #else
  77 #endif
  78   m.unlock();
  79   t.join();
  80
  81   return boost::report_errors();
  82 }
  83
  84