ceph/src/boost/libs/thread/test/sync/mutual_exclusion/recursive_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/recursive_mutex.hpp>
  16
  17 // class recursive_timed_mutex;
  18
  19 // bool try_lock();
  20
  21 #include <boost/thread/recursive_mutex.hpp>
  22 #include <boost/thread/thread.hpp>
  23 #include <boost/detail/lightweight_test.hpp>
  24
  25
  26
  27 boost::recursive_timed_mutex m;
  28
  29 #if defined BOOST_THREAD_USES_CHRONO
  30 typedef boost::chrono::system_clock Clock;
  31 typedef Clock::time_point time_point;
  32 typedef Clock::duration duration;
  33 typedef boost::chrono::milliseconds ms;
  34 typedef boost::chrono::nanoseconds ns;
  35 #else
  36 #endif
  37
  38 #ifdef BOOST_THREAD_PLATFORM_WIN32
  39 const ms max_diff(250);
  40 #else
  41 const ms max_diff(75);
  42 #endif
  43
  44 void f()
  45 {
  46 #if defined BOOST_THREAD_USES_CHRONO
  47   time_point t0 = Clock::now();
  48   BOOST_TEST(!m.try_lock());
  49   BOOST_TEST(!m.try_lock());
  50   BOOST_TEST(!m.try_lock());
  51   while (!m.try_lock())
  52     ;
  53   time_point t1 = Clock::now();
  54   BOOST_TEST(m.try_lock());
  55   m.unlock();
  56   m.unlock();
  57   ns d = t1 - t0 - ms(250);
  58   BOOST_TEST(d < max_diff);
  59 #else
  60   //time_point t0 = Clock::now();
  61   //BOOST_TEST(!m.try_lock());
  62   //BOOST_TEST(!m.try_lock());
  63   //BOOST_TEST(!m.try_lock());
  64   while (!m.try_lock())
  65     ;
  66   //time_point t1 = Clock::now();
  67   BOOST_TEST(m.try_lock());
  68   m.unlock();
  69   m.unlock();
  70   //ns d = t1 - t0 - ms(250);
  71   //BOOST_TEST(d < max_diff);
  72 #endif
  73 }
  74
  75 int main()
  76 {
  77   m.lock();
  78   boost::thread t(f);
  79 #if defined BOOST_THREAD_USES_CHRONO
  80   boost::this_thread::sleep_for(ms(250));
  81 #else
  82 #endif
  83   m.unlock();
  84   t.join();
  85
  86   return boost::report_errors();
  87 }
  88
  89