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
  26 #ifdef BOOST_THREAD_USES_CHRONO
  27 typedef boost::chrono::high_resolution_clock Clock;
  28 typedef Clock::time_point time_point;
  29 typedef Clock::duration duration;
  30 typedef boost::chrono::milliseconds ms;
  31 typedef boost::chrono::nanoseconds ns;
  32 #endif
  33 boost::mutex m;
  34
  35 void f()
  36 {
  37 #ifdef BOOST_THREAD_USES_CHRONO
  38   time_point t0 = Clock::now();
  39   time_point t1;
  40   {
  41     m.lock();
  42     boost::lock_guard<boost::mutex> lg(m, boost::adopt_lock);
  43     t1 = Clock::now();
  44   }
  45   ns d = t1 - t0 - ms(250);
  46   BOOST_TEST(d < ns(2500000)+ms(1000)); // within 2.5ms
  47 #else
  48   //time_point t0 = Clock::now();
  49   //time_point t1;
  50   {
  51     m.lock();
  52     boost::lock_guard<boost::mutex> lg(m, boost::adopt_lock);
  53     //t1 = Clock::now();
  54   }
  55   //ns d = t1 - t0 - ms(250);
  56   //BOOST_TEST(d < ns(2500000)+ms(1000)); // within 2.5ms
  57 #endif
  58 }
  59
  60 int main()
  61 {
  62   m.lock();
  63   boost::thread t(f);
  64 #ifdef BOOST_THREAD_USES_CHRONO
  65   boost::this_thread::sleep_for(ms(250));
  66 #endif
  67   m.unlock();
  68   t.join();
  69
  70   return boost::report_errors();
  71 }
  72