timer.cpp
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/*
* 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.cpp
* \author Andrey Semashev
* \date 02.12.2007
*
* \brief This header is the Boost.Log library implementation, see the library documentation
* at http://www.boost.org/doc/libs/release/libs/log/doc/html/index.html.
*/
#include <boost/log/detail/config.hpp>
#include <boost/log/attributes/timer.hpp>
#include <boost/log/attributes/attribute_value_impl.hpp>
#if defined(BOOST_WINDOWS) && !defined(BOOST_LOG_NO_QUERY_PERFORMANCE_COUNTER)
#include <boost/assert.hpp>
#include <boost/cstdint.hpp>
#if !defined(BOOST_LOG_NO_THREADS)
#include <boost/log/detail/locks.hpp>
#include <boost/thread/mutex.hpp>
#endif
#include <windows.h>
#include <boost/log/detail/header.hpp>
namespace boost {
BOOST_LOG_OPEN_NAMESPACE
namespace attributes {
//! Factory implementation
class BOOST_SYMBOL_VISIBLE timer::impl :
public attribute::impl
{
private:
#if !defined(BOOST_LOG_NO_THREADS)
//! Synchronization mutex type
typedef boost::mutex mutex_type;
//! Synchronization mutex
mutex_type m_Mutex;
#endif
//! Frequency factor for calculating duration
double m_FrequencyFactor;
//! Last value of the performance counter
uint64_t m_LastCounter;
//! Elapsed time duration, in microseconds
uint64_t m_Duration;
public:
//! Constructor
impl() : m_Duration(0)
{
LARGE_INTEGER li;
QueryPerformanceFrequency(&li);
BOOST_ASSERT(li.QuadPart != 0LL);
m_FrequencyFactor = 1000000.0 / static_cast< double >(li.QuadPart);
QueryPerformanceCounter(&li);
m_LastCounter = static_cast< uint64_t >(li.QuadPart);
}
//! The method returns the actual attribute value. It must not return NULL.
attribute_value get_value()
{
uint64_t duration;
{
BOOST_LOG_EXPR_IF_MT(log::aux::exclusive_lock_guard< mutex_type > lock(m_Mutex);)
LARGE_INTEGER li;
QueryPerformanceCounter(&li);
const uint64_t counter = static_cast< uint64_t >(li.QuadPart);
const uint64_t counts = counter - m_LastCounter;
m_LastCounter = counter;
duration = m_Duration + static_cast< uint64_t >(counts * m_FrequencyFactor);
m_Duration = duration;
}
return attribute_value(new attribute_value_impl< value_type >(boost::posix_time::microseconds(duration)));
}
};
//! Constructor
timer::timer() : attribute(new impl())
{
}
//! Constructor for casting support
timer::timer(cast_source const& source) : attribute(source.as< impl >())
{
}
} // namespace attributes
BOOST_LOG_CLOSE_NAMESPACE // namespace log
} // namespace boost
#include <boost/log/detail/footer.hpp>
#else // defined(BOOST_WINDOWS) && !defined(BOOST_LOG_NO_QUERY_PERFORMANCE_COUNTER)
#include <boost/log/detail/header.hpp>
namespace boost {
BOOST_LOG_OPEN_NAMESPACE
namespace attributes {
//! Factory implementation
class BOOST_SYMBOL_VISIBLE timer::impl :
public attribute::impl
{
public:
//! Time type
typedef utc_time_traits::time_type time_type;
private:
//! Base time point
const time_type m_BaseTimePoint;
public:
/*!
* Constructor. Starts time counting.
*/
impl() : m_BaseTimePoint(utc_time_traits::get_clock()) {}
attribute_value get_value() BOOST_OVERRIDE
{
return attribute_value(new attribute_value_impl< value_type >(
utc_time_traits::get_clock() - m_BaseTimePoint));
}
};
//! Constructor
timer::timer() : attribute(new impl())
{
}
//! Constructor for casting support
timer::timer(cast_source const& source) : attribute(source.as< impl >())
{
}
} // namespace attributes
BOOST_LOG_CLOSE_NAMESPACE // namespace log
} // namespace boost
#include <boost/log/detail/footer.hpp>
#endif // defined(BOOST_WINDOWS) && !defined(BOOST_LOG_NO_QUERY_PERFORMANCE_COUNTER)