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//
// MIT License
// Copyright (c) 2019 Jonathan R. Madsen
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED
// "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
// LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
// ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
// ----------------------------------------------------------------------
// Class Timer
//
// Class description:
//
// Class for timer objects, able to measure elasped user/system process time.
//
// Note: Uses <sys/times.h> & <unistd.h> - POSIX.1 defined
// If used, this header must be included in the source (.cc) file and it
// must be the first header file to be included!
//
// Member functions:
//
// Timer()
// Construct a timer object
// Start()
// Start timing
// Stop()
// Stop timing
// bool IsValid()
// Return true if have a valid time (ie start() and stop() called)
// double GetRealElapsed()
// Return the elapsed real time between last calling start() and stop()
// double GetSystemElapsed()
// Return the elapsed system time between last calling start() and stop()
// double GetUserElapsed()
// Return the elapsed user time between last calling start() and stop()
//
// Operators:
//
// std::ostream& operator << (std::ostream& os, const Timer& t);
// Print the elapsed real,system and usertimes on os. Prints **s for times
// if !IsValid
//
// Member data:
//
// bool fValidTimes
// True after start and stop have both been called more than once and
// an equal number of times
// clock_t fStartRealTime,fEndRealTime
// Real times (arbitrary time 0)
// tms fStartTimes,fEndTimes
// Timing structures (see times(2)) for start and end times
// History:
// 23.08.96 P.Kent Updated to also computed real elapsed time
// 21.08.95 P.Kent
// 29.04.97 G.Cosmo Added timings for Windows/NT
#pragma once
#include "PTL/Types.hh"
#include <chrono>
#include <iomanip>
#include <ostream>
#include <sstream>
#if !(defined(WIN32) || defined(_WIN32) || defined(WIN64) || defined(_WIN64))
# include <sys/times.h>
# include <unistd.h>
#else
# include <ctime>
# define _SC_CLK_TCK 1
extern "C"
{
int sysconf(int);
};
// Structure returned by times()
struct tms
{
clock_t tms_utime; /* user time */
clock_t tms_stime; /* system time */
clock_t tms_cutime; /* user time, children */
clock_t tms_cstime; /* system time, children */
};
extern "C"
{
extern clock_t times(struct tms*);
};
#endif /* WIN32 */
namespace PTL
{
class Timer
{
typedef std::chrono::high_resolution_clock clock_type;
public:
Timer();
public:
inline void Start();
inline void Stop();
inline bool IsValid() const;
inline const char* GetClockTime() const;
double GetRealElapsed() const;
double GetSystemElapsed() const;
double GetUserElapsed() const;
public:
friend std::ostream& operator<<(std::ostream& os, const Timer& t)
{
// so fixed doesn't propagate
std::stringstream ss;
ss << std::fixed;
if(t.IsValid())
{
ss << "Real=" << t.GetRealElapsed() << "s User=" << t.GetUserElapsed()
<< "s Sys=" << t.GetSystemElapsed() << "s";
// avoid possible FPE error
if(t.GetRealElapsed() > 1.0e-6)
{
double cpu_util = (t.GetUserElapsed() + t.GetSystemElapsed()) /
t.GetRealElapsed() * 100.0;
ss << std::setprecision(1);
ss << " [Cpu=" << std::setprecision(1) << cpu_util << "%]";
}
}
else
{
ss << "Real=****s User=****s Sys=****s";
}
os << ss.str();
return os;
}
private:
bool fValidTimes;
std::chrono::time_point<clock_type> fStartRealTime, fEndRealTime;
tms fStartTimes, fEndTimes;
};
} // namespace PTL
#include "PTL/Timer.icc"
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