mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2024-11-12 07:06:17 -05:00
92 lines
2.0 KiB
C++
92 lines
2.0 KiB
C++
// Copyright (C) 2006 Douglas Gregor <doug.gregor -at- gmail.com>
|
|
|
|
// Use, modification and distribution is subject to 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
|
|
*
|
|
* This header provides the @c timer class, which provides access to
|
|
* the MPI timers.
|
|
*/
|
|
#ifndef BOOST_MPI_TIMER_HPP
|
|
#define BOOST_MPI_TIMER_HPP
|
|
|
|
#include <boost/mpi/config.hpp>
|
|
#include <boost/limits.hpp>
|
|
|
|
namespace boost { namespace mpi {
|
|
|
|
/** @brief A simple timer that provides access to the MPI timing
|
|
* facilities.
|
|
*
|
|
* The @c timer class is a simple wrapper around the MPI timing
|
|
* facilities that mimics the interface of the Boost Timer library.
|
|
*/
|
|
class BOOST_MPI_DECL timer {
|
|
public:
|
|
/** Initializes the timer
|
|
*
|
|
* @post @c elapsed() == 0
|
|
*/
|
|
timer();
|
|
|
|
/** Restart the timer.
|
|
*
|
|
* @post @c elapsed() == 0
|
|
*/
|
|
void restart();
|
|
|
|
/** Return the amount of time that has elapsed since the last
|
|
* construction or reset, in seconds.
|
|
*/
|
|
double elapsed() const;
|
|
|
|
/** Return an estimate of the maximum possible value of
|
|
* elapsed(). Note that this routine may return too high a value on
|
|
* some systems.
|
|
*/
|
|
double elapsed_max() const;
|
|
|
|
/** Returns the minimum non-zero value that @c elapsed() may
|
|
* return. This is the resolution of the timer.
|
|
*/
|
|
double elapsed_min() const;
|
|
|
|
/** Determines whether the elapsed time values are global times or
|
|
local processor times. */
|
|
static bool time_is_global();
|
|
|
|
private:
|
|
double start_time;
|
|
}; // timer
|
|
|
|
inline timer::timer()
|
|
{
|
|
restart();
|
|
}
|
|
|
|
inline void timer::restart()
|
|
{
|
|
start_time = MPI_Wtime();
|
|
}
|
|
|
|
inline double timer::elapsed() const
|
|
{
|
|
return MPI_Wtime() - start_time;
|
|
}
|
|
|
|
inline double timer::elapsed_max() const
|
|
{
|
|
return (std::numeric_limits<double>::max)();
|
|
}
|
|
|
|
inline double timer::elapsed_min() const
|
|
{
|
|
return MPI_Wtick();
|
|
}
|
|
|
|
} } // end namespace boost::mpi
|
|
|
|
#endif // BOOST_MPI_TIMER_HPP
|