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 #include "../../../timming.hpp"
  25
  26 boost::recursive_timed_mutex m;
  27
  28 #if defined BOOST_THREAD_USES_CHRONO
  29 typedef boost::chrono::high_resolution_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 time_point t0;
  35 time_point t1;
  36 #else
  37 #endif
  38
  39 const ms max_diff(BOOST_THREAD_TEST_TIME_MS);
  40
  41 void f()
  42 {
  43 #if defined BOOST_THREAD_USES_CHRONO
  44   t0 = Clock::now();
  45   BOOST_TEST(!m.try_lock());
  46   BOOST_TEST(!m.try_lock());
  47   BOOST_TEST(!m.try_lock());
  48   while (!m.try_lock())
  49     ;
  50   t1 = Clock::now();
  51   BOOST_TEST(m.try_lock());
  52   m.unlock();
  53   m.unlock();
  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   //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   time_point t2 = Clock::now();
  76   boost::this_thread::sleep_for(ms(250));
  77   time_point t3 = Clock::now();
  78 #else
  79 #endif
  80   m.unlock();
  81   t.join();
  82
  83 #if defined BOOST_THREAD_USES_CHRONO
  84   ns sleep_time = t3 - t2;
  85   ns d_ns = t1 - t0 - sleep_time;
  86   ms d_ms = boost::chrono::duration_cast<boost::chrono::milliseconds>(d_ns);
  87   // BOOST_TEST_GE(d_ms.count(), 0);
  88   BOOST_THREAD_TEST_IT(d_ms, max_diff);
  89   BOOST_THREAD_TEST_IT(d_ns, ns(max_diff));
  90 #endif
  91
  92   return boost::report_errors();
  93 }
  94
  95