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Diffstat (limited to 'boost/chrono/detail/inlined/win/thread_clock.hpp')
-rw-r--r-- | boost/chrono/detail/inlined/win/thread_clock.hpp | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/boost/chrono/detail/inlined/win/thread_clock.hpp b/boost/chrono/detail/inlined/win/thread_clock.hpp new file mode 100644 index 0000000000..8ca1506ce5 --- /dev/null +++ b/boost/chrono/detail/inlined/win/thread_clock.hpp @@ -0,0 +1,102 @@ +// 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 |