56 lines
1.6 KiB
C++
56 lines
1.6 KiB
C++
// Copyright (c) 2020 Andrey Semashev
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//
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// Distributed under the Boost Software License, Version 1.0.
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// See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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#ifndef BOOST_ATOMIC_TEST_TEST_CLOCK_HPP_INCLUDED_
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#define BOOST_ATOMIC_TEST_TEST_CLOCK_HPP_INCLUDED_
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#include <boost/config.hpp>
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#if defined(BOOST_WINDOWS)
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#include <boost/winapi/config.hpp>
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#include <boost/winapi/basic_types.hpp>
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#include <boost/winapi/time.hpp>
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#include <boost/ratio/ratio.hpp>
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#endif
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#include <boost/chrono/chrono.hpp>
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namespace chrono = boost::chrono;
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#if defined(BOOST_WINDOWS)
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// On Windows high precision clocks tend to cause spurious test failures because threads wake up earlier than expected.
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// Use a lower precision steady clock for tests.
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struct test_clock
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{
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#if BOOST_USE_WINAPI_VERSION >= BOOST_WINAPI_VERSION_WIN6
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typedef boost::winapi::ULONGLONG_ rep;
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#else
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typedef boost::winapi::DWORD_ rep;
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#endif
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typedef boost::milli period;
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typedef chrono::duration< rep, period > duration;
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typedef chrono::time_point< test_clock, duration > time_point;
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static BOOST_CONSTEXPR_OR_CONST bool is_steady = true;
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static time_point now() BOOST_NOEXCEPT
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{
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#if BOOST_USE_WINAPI_VERSION >= BOOST_WINAPI_VERSION_WIN6
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rep ticks = boost::winapi::GetTickCount64();
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#else
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rep ticks = boost::winapi::GetTickCount();
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#endif
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return time_point(duration(ticks));
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}
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};
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#elif defined(BOOST_CHRONO_HAS_CLOCK_STEADY)
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typedef chrono::steady_clock test_clock;
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#else
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typedef chrono::system_clock test_clock;
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#endif
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#endif // BOOST_ATOMIC_TEST_TEST_CLOCK_HPP_INCLUDED_
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