/*
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* Copyright Andrey Semashev 2007 - 2015.
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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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*/
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/*!
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* \file timestamp.hpp
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* \author Andrey Semashev
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* \date 31.07.2011
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*
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* \brief This header is the Boost.Log library implementation, see the library documentation
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* at http://www.boost.org/doc/libs/release/libs/log/doc/html/index.html.
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*/
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#ifndef BOOST_LOG_DETAIL_TIMESTAMP_HPP_INCLUDED_
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#define BOOST_LOG_DETAIL_TIMESTAMP_HPP_INCLUDED_
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#include <boost/cstdint.hpp>
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#include <boost/log/detail/config.hpp>
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#if defined(BOOST_WINDOWS) && !defined(__CYGWIN__)
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#include <boost/winapi/basic_types.hpp>
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#endif
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#include <boost/log/detail/header.hpp>
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#ifdef BOOST_HAS_PRAGMA_ONCE
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#pragma once
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#endif
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namespace boost {
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BOOST_LOG_OPEN_NAMESPACE
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namespace aux {
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/*!
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* Duration between two timestamps
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*/
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class duration
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{
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int64_t m_ticks;
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public:
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explicit duration(int64_t ticks = 0) BOOST_NOEXCEPT : m_ticks(ticks) {}
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#if defined(BOOST_WINDOWS) && !defined(__CYGWIN__)
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int64_t milliseconds() const { return m_ticks; }
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#else
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BOOST_LOG_API int64_t milliseconds() const;
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#endif
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};
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/*!
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* Opaque timestamp class
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*/
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class timestamp
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{
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uint64_t m_ticks;
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public:
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explicit timestamp(uint64_t ticks = 0) BOOST_NOEXCEPT : m_ticks(ticks) {}
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duration operator- (timestamp that) const
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{
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return duration(m_ticks - that.m_ticks);
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}
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};
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/*!
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* \fn get_timestamp
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*
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* The function returns a timestamp, in opaque units since an unspecified
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* time point. This timer is guaranteed to be monotonic, it should not
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* be affected by clock changes, either manual or seasonal. Also, it
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* should be as fast as possible.
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*/
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#if defined(BOOST_WINDOWS) && !defined(__CYGWIN__)
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typedef uint64_t (BOOST_WINAPI_WINAPI_CC* get_tick_count_t)();
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extern BOOST_LOG_API get_tick_count_t get_tick_count;
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inline timestamp get_timestamp()
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{
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return timestamp(get_tick_count());
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}
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#else
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typedef timestamp (*get_timestamp_t)();
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extern BOOST_LOG_API get_timestamp_t get_timestamp;
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#endif
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} // namespace aux
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BOOST_LOG_CLOSE_NAMESPACE // namespace log
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} // namespace boost
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#include <boost/log/detail/footer.hpp>
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#endif // BOOST_LOG_DETAIL_TIMESTAMP_HPP_INCLUDED_
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