Chris@16: //  boost thread_clock.cpp  -----------------------------------------------------------//
Chris@16: 
Chris@16: //  Copyright 2010 Vicente J. Botet Escriba
Chris@16: 
Chris@16: //  Distributed under the Boost Software License, Version 1.0.
Chris@16: //  See http://www.boost.org/LICENSE_1_0.txt
Chris@16: 
Chris@16: //  See http://www.boost.org/libs/chrono for documentation.
Chris@16: 
Chris@16: //--------------------------------------------------------------------------------------//
Chris@16: #ifndef BOOST_CHRONO_DETAIL_INLINED_WIN_THREAD_CLOCK_HPP
Chris@16: #define BOOST_CHRONO_DETAIL_INLINED_WIN_THREAD_CLOCK_HPP
Chris@16: 
Chris@16: #include <boost/chrono/config.hpp>
Chris@16: #include <boost/chrono/thread_clock.hpp>
Chris@16: #include <cassert>
Chris@16: 
Chris@16: #include <boost/detail/winapi/GetLastError.hpp>
Chris@16: #include <boost/detail/winapi/GetCurrentThread.hpp>
Chris@16: #include <boost/detail/winapi/GetThreadTimes.hpp>
Chris@16: 
Chris@16: namespace boost
Chris@16: {
Chris@16: namespace chrono
Chris@16: {
Chris@16: 
Chris@16: #if !defined BOOST_CHRONO_DONT_PROVIDE_HYBRID_ERROR_HANDLING
Chris@16: thread_clock::time_point thread_clock::now( system::error_code & ec )
Chris@16: {
Chris@16:     //  note that Windows uses 100 nanosecond ticks for FILETIME
Chris@16:     boost::detail::winapi::FILETIME_ creation, exit, user_time, system_time;
Chris@16: 
Chris@16:     if ( boost::detail::winapi::GetThreadTimes(
Chris@16:             boost::detail::winapi::GetCurrentThread (), &creation, &exit,
Chris@16:             &system_time, &user_time ) )
Chris@16:     {
Chris@16:         duration user = duration(
Chris@16:                 ((static_cast<duration::rep>(user_time.dwHighDateTime) << 32)
Chris@16:                         | user_time.dwLowDateTime) * 100 );
Chris@16: 
Chris@16:         duration system = duration(
Chris@16:                 ((static_cast<duration::rep>(system_time.dwHighDateTime) << 32)
Chris@16:                         | system_time.dwLowDateTime) * 100 );
Chris@16: 
Chris@16:         if (!BOOST_CHRONO_IS_THROWS(ec)) 
Chris@16:         {
Chris@16:             ec.clear();
Chris@16:         }
Chris@16:         return time_point(system+user);
Chris@16: 
Chris@16:     }
Chris@16:     else
Chris@16:     {
Chris@16:         if (BOOST_CHRONO_IS_THROWS(ec)) 
Chris@16:         {
Chris@16:             boost::throw_exception(
Chris@16:                     system::system_error( 
Chris@16:                             boost::detail::winapi::GetLastError(), 
Chris@16:                             BOOST_CHRONO_SYSTEM_CATEGORY, 
Chris@16:                             "chrono::thread_clock" ));
Chris@16:         } 
Chris@16:         else 
Chris@16:         {
Chris@16:             ec.assign( boost::detail::winapi::GetLastError(), BOOST_CHRONO_SYSTEM_CATEGORY );
Chris@16:             return thread_clock::time_point(duration(0));
Chris@16:         }
Chris@16:     }
Chris@16: }
Chris@16: #endif
Chris@16: 
Chris@16: thread_clock::time_point thread_clock::now() BOOST_NOEXCEPT
Chris@16: {
Chris@16: 
Chris@16:     //  note that Windows uses 100 nanosecond ticks for FILETIME
Chris@16:     boost::detail::winapi::FILETIME_ creation, exit, user_time, system_time;
Chris@16: 
Chris@16:     if ( boost::detail::winapi::GetThreadTimes( 
Chris@16:             boost::detail::winapi::GetCurrentThread (), &creation, &exit,
Chris@16:             &system_time, &user_time ) )
Chris@16:     {
Chris@16:         duration user   = duration(
Chris@16:                 ((static_cast<duration::rep>(user_time.dwHighDateTime) << 32)
Chris@16:                         | user_time.dwLowDateTime) * 100 );
Chris@16: 
Chris@16:         duration system = duration(
Chris@16:                 ((static_cast<duration::rep>(system_time.dwHighDateTime) << 32)
Chris@16:                         | system_time.dwLowDateTime) * 100 );
Chris@16: 
Chris@16:         return time_point(system+user);
Chris@16:     }
Chris@16:     else
Chris@16:     {
Chris@16:       BOOST_ASSERT(0 && "Boost::Chrono - Internal Error");
Chris@16:       return time_point();
Chris@16:     }
Chris@16: 
Chris@16: }
Chris@16: 
Chris@16: } // namespace chrono
Chris@16: } // namespace boost
Chris@16: 
Chris@16: #endif