124 lines
3.3 KiB
C
124 lines
3.3 KiB
C
|
// Copyright (c) 1997
|
||
|
|
// Utrecht University (The Netherlands),
|
||
|
|
// ETH Zurich (Switzerland),
|
||
|
|
// INRIA Sophia-Antipolis (France),
|
||
|
|
// Max-Planck-Institute Saarbruecken (Germany),
|
||
|
|
// and Tel-Aviv University (Israel). All rights reserved.
|
||
|
|
//
|
||
|
|
// This file is part of CGAL (www.cgal.org)
|
||
|
|
//
|
||
|
|
// $URL: https://github.com/CGAL/cgal/blob/v5.1/Profiling_tools/include/CGAL/Timer.h $
|
||
|
|
// $Id: Timer.h 0779373 2020-03-26T13:31:46+01:00 Sébastien Loriot
|
||
|
|
// SPDX-License-Identifier: LGPL-3.0-or-later OR LicenseRef-Commercial
|
||
|
|
//
|
||
|
|
//
|
||
|
|
// Author(s) : Lutz Kettner <kettner@inf.ethz.ch>
|
||
|
|
// Matthias Baesken <baesken@informatik.uni-halle.de>
|
||
|
|
|
||
|
|
#ifndef CGAL_TIMER_H
|
||
|
|
#define CGAL_TIMER_H 1
|
||
|
|
|
||
|
|
#include <CGAL/config.h>
|
||
|
|
#include <CGAL/assertions.h>
|
||
|
|
|
||
|
|
namespace CGAL {
|
||
|
|
|
||
|
|
// SECTION: A Timer for User-Process Time
|
||
|
|
// ========================================================================
|
||
|
|
//
|
||
|
|
// DEFINITION
|
||
|
|
//
|
||
|
|
// A timer `t' of type Timer is an object with a state. It is either
|
||
|
|
// running or it is stopped. The state is controlled with `t.start()'
|
||
|
|
// and `t.stop()'. The timer counts the time elapsed since its creation
|
||
|
|
// or last reset. It counts only the time where it is in the running
|
||
|
|
// state. The time information is given in seconds.
|
||
|
|
|
||
|
|
class CGAL_EXPORT Timer {
|
||
|
|
private:
|
||
|
|
double elapsed;
|
||
|
|
double started;
|
||
|
|
int interv;
|
||
|
|
bool running;
|
||
|
|
|
||
|
|
#ifdef CGAL_HEADER_ONLY
|
||
|
|
static bool& get_static_timer_m_failed()
|
||
|
|
{
|
||
|
|
static bool m_failed = false;
|
||
|
|
return m_failed;
|
||
|
|
}
|
||
|
|
#else // CGAL_HEADER_ONLY
|
||
|
|
static bool m_failed;
|
||
|
|
static bool& get_static_timer_m_failed()
|
||
|
|
{ return CGAL::Timer::m_failed; }
|
||
|
|
#endif // CGAL_HEADER_ONLY
|
||
|
|
|
||
|
|
double user_process_time() const; // in seconds
|
||
|
|
double compute_precision() const; // in seconds
|
||
|
|
public:
|
||
|
|
Timer() : elapsed(0.0), started(0.0), interv(0), running(false) {}
|
||
|
|
|
||
|
|
void start();
|
||
|
|
void stop ();
|
||
|
|
void reset();
|
||
|
|
bool is_running() const { return running; }
|
||
|
|
|
||
|
|
double time() const;
|
||
|
|
int intervals() const { return interv; }
|
||
|
|
double precision() const;
|
||
|
|
// Returns timer precison. Computes it dynamically at first call.
|
||
|
|
// Returns -1.0 if timer system call fails, which, for a proper coded
|
||
|
|
// test towards precision leads to an immediate stop of an otherwise
|
||
|
|
// infinite loop (fixed tolerance * total time >= precision).
|
||
|
|
double max BOOST_PREVENT_MACRO_SUBSTITUTION () const;
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
// -----------------------------------------------------------------------
|
||
|
|
|
||
|
|
// Member functions for Timer
|
||
|
|
// ===========================
|
||
|
|
|
||
|
|
inline void Timer::start() {
|
||
|
|
CGAL_precondition( ! running);
|
||
|
|
started = user_process_time();
|
||
|
|
running = true;
|
||
|
|
++ interv;
|
||
|
|
}
|
||
|
|
|
||
|
|
inline void Timer::stop() {
|
||
|
|
CGAL_precondition( running);
|
||
|
|
double t = user_process_time();
|
||
|
|
elapsed += (t - started);
|
||
|
|
started = 0.0;
|
||
|
|
running = false;
|
||
|
|
}
|
||
|
|
|
||
|
|
inline void Timer::reset() {
|
||
|
|
interv = 0;
|
||
|
|
elapsed = 0.0;
|
||
|
|
if (running) {
|
||
|
|
started = user_process_time();
|
||
|
|
++ interv;
|
||
|
|
} else {
|
||
|
|
started = 0.0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
inline double Timer::time() const {
|
||
|
|
if (running) {
|
||
|
|
double t = user_process_time();
|
||
|
|
return elapsed + (t - started);
|
||
|
|
}
|
||
|
|
return elapsed;
|
||
|
|
}
|
||
|
|
|
||
|
|
} //namespace CGAL
|
||
|
|
|
||
|
|
#ifdef CGAL_HEADER_ONLY
|
||
|
|
#include <CGAL/Timer_impl.h>
|
||
|
|
#endif // CGAL_HEADER_ONLY
|
||
|
|
|
||
|
|
#endif // CGAL_TIMER_H //
|
||
|
|
// EOF //
|