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// boost thread_clock.cpp -----------------------------------------------------------//
// Copyright 2010 Vicente J. Botet Escriba
// Distributed under the Boost Software License, Version 1.0.
// See http://www.boost.org/LICENSE_1_0.txt
// See http://www.boost.org/libs/chrono for documentation.
//--------------------------------------------------------------------------------------//
#ifndef BOOST_CHRONO_DETAIL_INLINED_WIN_THREAD_CLOCK_HPP
#define BOOST_CHRONO_DETAIL_INLINED_WIN_THREAD_CLOCK_HPP
#include <boost/chrono/config.hpp>
#include <boost/chrono/thread_clock.hpp>
#include <cassert>
#include <boost/detail/win/GetLastError.hpp>
#include <boost/detail/win/GetCurrentThread.hpp>
#include <boost/detail/win/GetThreadTimes.hpp>
namespace boost
{
namespace chrono
{
#if !defined BOOST_CHRONO_DONT_PROVIDE_HYBRID_ERROR_HANDLING
thread_clock::time_point thread_clock::now( system::error_code & ec )
{
// note that Windows uses 100 nanosecond ticks for FILETIME
boost::detail::win32::FILETIME_ creation, exit, user_time, system_time;
if ( boost::detail::win32::GetThreadTimes(
boost::detail::win32::GetCurrentThread (), &creation, &exit,
&system_time, &user_time ) )
{
duration user = duration(
((static_cast<duration::rep>(user_time.dwHighDateTime) << 32)
| user_time.dwLowDateTime) * 100 );
duration system = duration(
((static_cast<duration::rep>(system_time.dwHighDateTime) << 32)
| system_time.dwLowDateTime) * 100 );
if (!BOOST_CHRONO_IS_THROWS(ec))
{
ec.clear();
}
return time_point(system+user);
}
else
{
if (BOOST_CHRONO_IS_THROWS(ec))
{
boost::throw_exception(
system::system_error(
boost::detail::win32::GetLastError(),
BOOST_CHRONO_SYSTEM_CATEGORY,
"chrono::thread_clock" ));
}
else
{
ec.assign( boost::detail::win32::GetLastError(), BOOST_CHRONO_SYSTEM_CATEGORY );
return thread_clock::time_point(duration(0));
}
}
}
#endif
thread_clock::time_point thread_clock::now() BOOST_NOEXCEPT
{
// note that Windows uses 100 nanosecond ticks for FILETIME
boost::detail::win32::FILETIME_ creation, exit, user_time, system_time;
if ( boost::detail::win32::GetThreadTimes(
boost::detail::win32::GetCurrentThread (), &creation, &exit,
&system_time, &user_time ) )
{
duration user = duration(
((static_cast<duration::rep>(user_time.dwHighDateTime) << 32)
| user_time.dwLowDateTime) * 100 );
duration system = duration(
((static_cast<duration::rep>(system_time.dwHighDateTime) << 32)
| system_time.dwLowDateTime) * 100 );
return time_point(system+user);
}
else
{
BOOST_ASSERT(0 && "Boost::Chrono - Internal Error");
return time_point();
}
}
} // namespace chrono
} // namespace boost
#endif
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