ceph/src/boost/libs/thread/test/sync/mutual_exclusion/locks/lock_guard/adopt_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) 2012 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_type& m, adopt_lock_t);
  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 #include "../../../../timming.hpp"
  26
  27 #ifdef BOOST_THREAD_USES_CHRONO
  28 typedef boost::chrono::high_resolution_clock Clock;
  29 typedef Clock::time_point time_point;
  30 typedef Clock::duration duration;
  31 typedef boost::chrono::milliseconds ms;
  32 typedef boost::chrono::nanoseconds ns;
  33 time_point t0;
  34 time_point t1;
  35 #endif
  36 boost::mutex m;
  37
  38 const ms max_diff(BOOST_THREAD_TEST_TIME_MS);
  39
  40 void f()
  41 {
  42 #ifdef BOOST_THREAD_USES_CHRONO
  43   t0 = Clock::now();
  44   {
  45     m.lock();
  46     boost::lock_guard<boost::mutex> lg(m, boost::adopt_lock);
  47     t1 = Clock::now();
  48   }
  49 #else
  50   //time_point t0 = Clock::now();
  51   //time_point t1;
  52   {
  53     m.lock();
  54     boost::lock_guard<boost::mutex> lg(m, boost::adopt_lock);
  55     //t1 = Clock::now();
  56   }
  57   //ns d = t1 - t0 - ms(250);
  58   //BOOST_TEST(d < max_diff);
  59 #endif
  60 }
  61
  62 int main()
  63 {
  64   m.lock();
  65   boost::thread t(f);
  66 #ifdef BOOST_THREAD_USES_CHRONO
  67   time_point t2 = Clock::now();
  68   boost::this_thread::sleep_for(ms(250));
  69   time_point t3 = Clock::now();
  70 #endif
  71   m.unlock();
  72   t.join();
  73
  74 #if defined BOOST_THREAD_USES_CHRONO
  75   ns sleep_time = t3 - t2;
  76   ns d_ns = t1 - t0 - sleep_time;
  77   ms d_ms = boost::chrono::duration_cast<boost::chrono::milliseconds>(d_ns);
  78   // BOOST_TEST_GE(d_ms.count(), 0);
  79   BOOST_THREAD_TEST_IT(d_ms, max_diff);
  80   BOOST_THREAD_TEST_IT(d_ns, ns(max_diff));
  81 #endif
  82
  83   return boost::report_errors();
  84 }
  85