ceph/src/boost/libs/thread/test/sync/mutual_exclusion/locks/upgrade_lock/cons/try_to_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/locks.hpp>
  16
  17 // template <class Mutex> class upgrade_lock;
  18
  19 // upgrade_lock(mutex_type& m, try_to_lock_t);
  20
  21
  22 #include <boost/thread/lock_types.hpp>
  23 #include <boost/thread/shared_mutex.hpp>
  24 #include <boost/thread/thread.hpp>
  25 #include <boost/detail/lightweight_test.hpp>
  26 #include "../../../../../timming.hpp"
  27
  28 boost::shared_mutex m;
  29
  30 #if defined BOOST_THREAD_USES_CHRONO
  31 typedef boost::chrono::high_resolution_clock Clock;
  32 typedef Clock::time_point time_point;
  33 typedef Clock::duration duration;
  34 typedef boost::chrono::milliseconds ms;
  35 typedef boost::chrono::nanoseconds ns;
  36 time_point t0;
  37 time_point t1;
  38 #else
  39 #endif
  40
  41 const ms max_diff(BOOST_THREAD_TEST_TIME_MS);
  42
  43 void f()
  44 {
  45 #if defined BOOST_THREAD_USES_CHRONO
  46   t0 = Clock::now();
  47   {
  48     boost::upgrade_lock<boost::shared_mutex> lk(m, boost::try_to_lock);
  49     BOOST_TEST(lk.owns_lock() == false);
  50   }
  51   {
  52     boost::upgrade_lock<boost::shared_mutex> lk(m, boost::try_to_lock);
  53     BOOST_TEST(lk.owns_lock() == false);
  54   }
  55   {
  56     boost::upgrade_lock<boost::shared_mutex> lk(m, boost::try_to_lock);
  57     BOOST_TEST(lk.owns_lock() == false);
  58   }
  59   for (;;)
  60   {
  61     boost::upgrade_lock<boost::shared_mutex> lk(m, boost::try_to_lock);
  62     if (lk.owns_lock()) {
  63       t1 = Clock::now();
  64       break;
  65     }
  66   }
  67   //m.unlock();
  68 #else
  69 //  time_point t0 = Clock::now();
  70 //  {
  71 //    boost::upgrade_lock<boost::shared_mutex> lk(m, boost::try_to_lock);
  72 //    BOOST_TEST(lk.owns_lock() == false);
  73 //  }
  74 //  {
  75 //    boost::upgrade_lock<boost::shared_mutex> lk(m, boost::try_to_lock);
  76 //    BOOST_TEST(lk.owns_lock() == false);
  77 //  }
  78 //  {
  79 //    boost::upgrade_lock<boost::shared_mutex> lk(m, boost::try_to_lock);
  80 //    BOOST_TEST(lk.owns_lock() == false);
  81 //  }
  82   for (;;)
  83   {
  84     boost::upgrade_lock<boost::shared_mutex> lk(m, boost::try_to_lock);
  85     if (lk.owns_lock()) break;
  86   }
  87   //time_point t1 = Clock::now();
  88   //ns d = t1 - t0 - ms(250);
  89   //BOOST_TEST(d < max_diff);
  90 #endif
  91 }
  92
  93 int main()
  94 {
  95   m.lock();
  96   boost::thread t(f);
  97 #if defined BOOST_THREAD_USES_CHRONO
  98   time_point t2 = Clock::now();
  99   boost::this_thread::sleep_for(ms(250));
 100   time_point t3 = Clock::now();
 101 #else
 102 #endif
 103   m.unlock();
 104   t.join();
 105
 106 #if defined BOOST_THREAD_USES_CHRONO
 107   ns sleep_time = t3 - t2;
 108   ns d_ns = t1 - t0 - sleep_time;
 109   ms d_ms = boost::chrono::duration_cast<boost::chrono::milliseconds>(d_ns);
 110   // BOOST_TEST_GE(d_ms.count(), 0);
 111   BOOST_THREAD_TEST_IT(d_ms, max_diff);
 112   BOOST_THREAD_TEST_IT(d_ns, ns(max_diff));
 113 #endif
 114
 115   return boost::report_errors();
 116 }
 117