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96 lines
2.7 KiB
C++
96 lines
2.7 KiB
C++
/*
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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 clock.hpp
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* \author Andrey Semashev
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* \date 01.12.2007
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*
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* The header contains wall clock attribute implementation and typedefs.
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*/
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#ifndef BOOST_LOG_ATTRIBUTES_CLOCK_HPP_INCLUDED_
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#define BOOST_LOG_ATTRIBUTES_CLOCK_HPP_INCLUDED_
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#include <boost/log/detail/config.hpp>
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#include <boost/log/attributes/attribute.hpp>
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#include <boost/log/attributes/attribute_value.hpp>
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#include <boost/log/attributes/attribute_cast.hpp>
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#include <boost/log/attributes/attribute_value_impl.hpp>
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#include <boost/log/attributes/time_traits.hpp>
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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 attributes {
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/*!
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* \brief A class of an attribute that makes an attribute value of the current date and time
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*
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* The attribute generates current time stamp as a value. The type of the attribute value
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* is determined with time traits passed to the class template as a template parameter.
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* The time traits provided by the library use \c boost::posix_time::ptime as the time type.
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*
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* Time traits also determine the way time is acquired. There are two types of time traits
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* provided by the library: \c utc_time_traits and \c local_time_traits. The first returns UTC time,
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* the second returns local time.
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*/
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template< typename TimeTraitsT >
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class basic_clock :
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public attribute
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{
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public:
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//! Generated value type
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typedef typename TimeTraitsT::time_type value_type;
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protected:
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//! Attribute factory implementation
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struct BOOST_SYMBOL_VISIBLE impl :
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public attribute::impl
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{
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attribute_value get_value()
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{
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typedef attribute_value_impl< value_type > result_value;
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return attribute_value(new result_value(TimeTraitsT::get_clock()));
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}
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};
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public:
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/*!
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* Default constructor
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*/
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basic_clock() : attribute(new impl())
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{
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}
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/*!
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* Constructor for casting support
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*/
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explicit basic_clock(cast_source const& source) : attribute(source.as< impl >())
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{
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}
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};
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//! Attribute that returns current UTC time
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typedef basic_clock< utc_time_traits > utc_clock;
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//! Attribute that returns current local time
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typedef basic_clock< local_time_traits > local_clock;
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} // namespace attributes
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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_ATTRIBUTES_CLOCK_HPP_INCLUDED_
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