84 lines
2.5 KiB
C++
84 lines
2.5 KiB
C++
|
/*
|
||
|
|
* Copyright Andrey Semashev 2007 - 2015.
|
||
|
|
* Distributed under the Boost Software License, Version 1.0.
|
||
|
|
* (See accompanying file LICENSE_1_0.txt or copy at
|
||
|
|
* http://www.boost.org/LICENSE_1_0.txt)
|
||
|
|
*/
|
||
|
|
/*!
|
||
|
|
* \file timer.hpp
|
||
|
|
* \author Andrey Semashev
|
||
|
|
* \date 02.12.2007
|
||
|
|
*
|
||
|
|
* The header contains implementation of a stop watch attribute.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef BOOST_LOG_ATTRIBUTES_TIMER_HPP_INCLUDED_
|
||
|
|
#define BOOST_LOG_ATTRIBUTES_TIMER_HPP_INCLUDED_
|
||
|
|
|
||
|
|
#include <boost/log/detail/config.hpp>
|
||
|
|
#include <boost/log/attributes/attribute.hpp>
|
||
|
|
#include <boost/log/attributes/attribute_cast.hpp>
|
||
|
|
#include <boost/log/attributes/time_traits.hpp>
|
||
|
|
#include <boost/log/detail/header.hpp>
|
||
|
|
|
||
|
|
#ifdef BOOST_HAS_PRAGMA_ONCE
|
||
|
|
#pragma once
|
||
|
|
#endif
|
||
|
|
|
||
|
|
namespace boost {
|
||
|
|
|
||
|
|
BOOST_LOG_OPEN_NAMESPACE
|
||
|
|
|
||
|
|
namespace attributes {
|
||
|
|
|
||
|
|
/*!
|
||
|
|
* \brief A class of an attribute that makes an attribute value of the time interval since construction
|
||
|
|
*
|
||
|
|
* The timer attribute calculates the time passed since its construction and returns it on value acquisition.
|
||
|
|
* The attribute value type is <tt>boost::posix_time::time_duration</tt>.
|
||
|
|
*
|
||
|
|
* On Windows platform there are two implementations of the attribute. The default one is more precise but
|
||
|
|
* a bit slower. This version uses <tt>QueryPerformanceFrequence</tt>/<tt>QueryPerformanceCounter</tt> API
|
||
|
|
* to calculate elapsed time.
|
||
|
|
*
|
||
|
|
* There are known problems with these functions when used with some CPUs, notably AMD Athlon with
|
||
|
|
* Cool'n'Quiet technology enabled. See the following links for more information and possible resolutions:
|
||
|
|
*
|
||
|
|
* http://support.microsoft.com/?scid=kb;en-us;895980
|
||
|
|
* http://support.microsoft.com/?id=896256
|
||
|
|
*
|
||
|
|
* In case if none of these solutions apply, you are free to define <tt>BOOST_LOG_NO_QUERY_PERFORMANCE_COUNTER</tt> macro to
|
||
|
|
* fall back to another implementation based on Boost.DateTime.
|
||
|
|
*/
|
||
|
|
class BOOST_LOG_API timer :
|
||
|
|
public attribute
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
//! Attribute value type
|
||
|
|
typedef utc_time_traits::time_type::time_duration_type value_type;
|
||
|
|
|
||
|
|
private:
|
||
|
|
//! Factory implementation
|
||
|
|
class BOOST_SYMBOL_VISIBLE impl;
|
||
|
|
|
||
|
|
public:
|
||
|
|
/*!
|
||
|
|
* Constructor. Starts time counting.
|
||
|
|
*/
|
||
|
|
timer();
|
||
|
|
/*!
|
||
|
|
* Constructor for casting support
|
||
|
|
*/
|
||
|
|
explicit timer(cast_source const& source);
|
||
|
|
};
|
||
|
|
|
||
|
|
} // namespace attributes
|
||
|
|
|
||
|
|
BOOST_LOG_CLOSE_NAMESPACE // namespace log
|
||
|
|
|
||
|
|
} // namespace boost
|
||
|
|
|
||
|
|
#include <boost/log/detail/footer.hpp>
|
||
|
|
|
||
|
|
#endif // BOOST_LOG_ATTRIBUTES_TIMER_HPP_INCLUDED_
|