ceph/src/boost/boost/chrono/detail/inlined/win/thread_clock.hpp

   1 //  boost thread_clock.cpp  -----------------------------------------------------------//
   2
   3 //  Copyright 2010 Vicente J. Botet Escriba
   4
   5 //  Distributed under the Boost Software License, Version 1.0.
   6 //  See http://www.boost.org/LICENSE_1_0.txt
   7
   8 //  See http://www.boost.org/libs/chrono for documentation.
   9
  10 //--------------------------------------------------------------------------------------//
  11 #ifndef BOOST_CHRONO_DETAIL_INLINED_WIN_THREAD_CLOCK_HPP
  12 #define BOOST_CHRONO_DETAIL_INLINED_WIN_THREAD_CLOCK_HPP
  13
  14 #include <boost/chrono/config.hpp>
  15 #include <boost/chrono/thread_clock.hpp>
  16 #include <cassert>
  17 #include <boost/assert.hpp>
  18
  19 #include <boost/detail/winapi/get_last_error.hpp>
  20 #include <boost/detail/winapi/get_current_thread.hpp>
  21 #include <boost/detail/winapi/get_thread_times.hpp>
  22
  23 namespace boost
  24 {
  25 namespace chrono
  26 {
  27
  28 #if !defined BOOST_CHRONO_DONT_PROVIDE_HYBRID_ERROR_HANDLING
  29 thread_clock::time_point thread_clock::now( system::error_code & ec )
  30 {
  31     //  note that Windows uses 100 nanosecond ticks for FILETIME
  32     boost::detail::winapi::FILETIME_ creation, exit, user_time, system_time;
  33
  34     if ( boost::detail::winapi::GetThreadTimes(
  35             boost::detail::winapi::GetCurrentThread (), &creation, &exit,
  36             &system_time, &user_time ) )
  37     {
  38         duration user = duration(
  39                 ((static_cast<duration::rep>(user_time.dwHighDateTime) << 32)
  40                         | user_time.dwLowDateTime) * 100 );
  41
  42         duration system = duration(
  43                 ((static_cast<duration::rep>(system_time.dwHighDateTime) << 32)
  44                         | system_time.dwLowDateTime) * 100 );
  45
  46         if (!BOOST_CHRONO_IS_THROWS(ec))
  47         {
  48             ec.clear();
  49         }
  50         return time_point(system+user);
  51
  52     }
  53     else
  54     {
  55         if (BOOST_CHRONO_IS_THROWS(ec))
  56         {
  57             boost::throw_exception(
  58                     system::system_error(
  59                             boost::detail::winapi::GetLastError(),
  60                             BOOST_CHRONO_SYSTEM_CATEGORY,
  61                             "chrono::thread_clock" ));
  62         }
  63         else
  64         {
  65             ec.assign( boost::detail::winapi::GetLastError(), BOOST_CHRONO_SYSTEM_CATEGORY );
  66             return thread_clock::time_point(duration(0));
  67         }
  68     }
  69 }
  70 #endif
  71
  72 thread_clock::time_point thread_clock::now() BOOST_NOEXCEPT
  73 {
  74
  75     //  note that Windows uses 100 nanosecond ticks for FILETIME
  76     boost::detail::winapi::FILETIME_ creation, exit, user_time, system_time;
  77
  78     if ( boost::detail::winapi::GetThreadTimes(
  79             boost::detail::winapi::GetCurrentThread (), &creation, &exit,
  80             &system_time, &user_time ) )
  81     {
  82         duration user   = duration(
  83                 ((static_cast<duration::rep>(user_time.dwHighDateTime) << 32)
  84                         | user_time.dwLowDateTime) * 100 );
  85
  86         duration system = duration(
  87                 ((static_cast<duration::rep>(system_time.dwHighDateTime) << 32)
  88                         | system_time.dwLowDateTime) * 100 );
  89
  90         return time_point(system+user);
  91     }
  92     else
  93     {
  94       BOOST_ASSERT(0 && "Boost::Chrono - Internal Error");
  95       return time_point();
  96     }
  97
  98 }
  99
 100 } // namespace chrono
 101 } // namespace boost
 102
 103 #endif