// boost process_timer.cpp -----------------------------------------------------------//
// Copyright Beman Dawes 1994, 2006, 2008
// Copyright 2009-2010 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_PROCESS_CLOCK_HPP
#define BOOST_CHRONO_DETAIL_INLINED_WIN_PROCESS_CLOCK_HPP
#include <boost/chrono/config.hpp>
#include <boost/chrono/system_clocks.hpp>
#include <boost/chrono/process_times.hpp>
#include <cassert>
#include <boost/detail/win/GetLastError.hpp>
#include <boost/detail/win/GetCurrentProcess.hpp>
#include <boost/detail/win/GetProcessTimes.hpp>
namespace boost
{
namespace chrono
{
void process_clock::now( process_times & times_, system::error_code & ec )
{
// note that Windows uses 100 nanosecond ticks for FILETIME
boost::detail::win32::FILETIME_ creation, exit, user_time, system_time;
times_.real = duration( steady_clock::now().time_since_epoch().count() );
#ifdef UNDER_CE
// Windows CE does not support GetProcessTimes
assert( 0 && "GetProcessTimes not supported under Windows CE" );
times_.real = times_.system = times_.user = nanoseconds(-1);
#else
if ( boost::detail::win32::GetProcessTimes(
boost::detail::win32::GetCurrentProcess(), &creation, &exit,
&system_time, &user_time ) )
{
if (!BOOST_CHRONO_IS_THROWS(ec))
{
ec.clear();
}
times_.user = duration(
((static_cast<time_point::rep>(user_time.dwHighDateTime) << 32)
| user_time.dwLowDateTime) * 100 );
times_.system = duration(
((static_cast<time_point::rep>(system_time.dwHighDateTime) << 32)
| system_time.dwLowDateTime) * 100 );
}
else
{
boost::detail::win32::DWORD_ cause = boost::detail::win32::GetLastError();
if (BOOST_CHRONO_IS_THROWS(ec))
{
boost::throw_exception(
system::system_error(
cause,
BOOST_CHRONO_SYSTEM_CATEGORY,
"chrono::process_clock" ));
}
else
{
ec.assign( cause, BOOST_CHRONO_SYSTEM_CATEGORY );
times_.real = times_.system = times_.user = nanoseconds(-1);
}
}
#endif
}
} // namespace chrono
} // namespace boost
#endif
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