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