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 void f()
  39 {
  40 #if defined BOOST_THREAD_USES_CHRONO
  41   time_point t0 = Clock::now();
  42   BOOST_TEST(!m.try_lock());
  43   BOOST_TEST(!m.try_lock());
  44   BOOST_TEST(!m.try_lock());
  45   while (!m.try_lock())
  46     ;
  47   time_point t1 = Clock::now();
  48   BOOST_TEST(m.try_lock());
  49   m.unlock();
  50   m.unlock();
  51   ns d = t1 - t0 - ms(250);
  52   // This test is spurious as it depends on the time the thread system switches the threads
  53   BOOST_TEST(d < ns(50000000)+ms(1000)); // within 50ms
  54 #else
  55   //time_point t0 = Clock::now();
  56   //BOOST_TEST(!m.try_lock());
  57   //BOOST_TEST(!m.try_lock());
  58   //BOOST_TEST(!m.try_lock());
  59   while (!m.try_lock())
  60     ;
  61   //time_point t1 = Clock::now();
  62   BOOST_TEST(m.try_lock());
  63   m.unlock();
  64   m.unlock();
  65   //ns d = t1 - t0 - ms(250);
  66   // This test is spurious as it depends on the time the thread system switches the threads
  67   //BOOST_TEST(d < ns(50000000)+ms(1000)); // within 50ms
  68 #endif
  69 }
  70
  71 int main()
  72 {
  73   m.lock();
  74   boost::thread t(f);
  75 #if defined BOOST_THREAD_USES_CHRONO
  76   boost::this_thread::sleep_for(ms(250));
  77 #else
  78 #endif
  79   m.unlock();
  80   t.join();
  81
  82   return boost::report_errors();
  83 }
  84
  85