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#ifndef TEST_CHRONO
/* Copyright (C) 2014 J.F.Dockes
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the
* Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
// Measure and display time intervals.
#include "chrono.h"
#include <chrono>
using namespace std;
Chrono::TimePoint Chrono::o_now;
void Chrono::refnow()
{
o_now = chrono::steady_clock::now();
}
Chrono::Chrono()
: m_orig(chrono::steady_clock::now())
{
}
long Chrono::restart()
{
auto nnow = chrono::steady_clock::now();
auto ms =
chrono::duration_cast<chrono::milliseconds>(nnow - m_orig);
m_orig = nnow;
return ms.count();
}
long Chrono::urestart()
{
auto nnow = chrono::steady_clock::now();
auto ms =
chrono::duration_cast<chrono::microseconds>(nnow - m_orig);
m_orig = nnow;
return ms.count();
}
long Chrono::millis(bool frozen)
{
if (frozen) {
return chrono::duration_cast<chrono::milliseconds>
(o_now - m_orig).count();
} else {
return chrono::duration_cast<chrono::milliseconds>
(chrono::steady_clock::now() - m_orig).count();
}
}
long Chrono::micros(bool frozen)
{
if (frozen) {
return chrono::duration_cast<chrono::microseconds>
(o_now - m_orig).count();
} else {
return chrono::duration_cast<chrono::microseconds>
(chrono::steady_clock::now() - m_orig).count();
}
}
float Chrono::secs(bool frozen)
{
if (frozen) {
return chrono::duration_cast<chrono::seconds>
(o_now - m_orig).count();
} else {
return (chrono::duration_cast<chrono::seconds>
(chrono::steady_clock::now() - m_orig)).count();
}
}
#else
// Test
#include <stdio.h>
#include <signal.h>
#include <unistd.h>
#include <stdlib.h>
#include "chrono.h"
using namespace std;
static char *thisprog;
static void
Usage(void)
{
fprintf(stderr, "Usage : %s \n", thisprog);
exit(1);
}
Chrono achrono;
Chrono rchrono;
void
showsecs(long msecs)
{
fprintf(stderr, "%3.5f S", (double(msecs)) / 1000.0);
}
void
sigint(int sig)
{
signal(SIGINT, sigint);
signal(SIGQUIT, sigint);
fprintf(stderr, "Absolute interval: ");
showsecs(achrono.millis());
fprintf(stderr, ". Relative interval: ");
showsecs(rchrono.restart());
fprintf(stderr, ".\n");
if (sig == SIGQUIT) {
exit(0);
}
}
int main(int argc, char **argv)
{
thisprog = argv[0];
argc--; argv++;
if (argc != 0) {
Usage();
}
sleep(1);
fprintf(stderr, "Initial micros: %ld\n", achrono.micros());;
fprintf(stderr, "Type ^C for intermediate result, ^\\ to stop\n");
signal(SIGINT, sigint);
signal(SIGQUIT, sigint);
achrono.restart();
rchrono.restart();
while (1) {
pause();
}
}
#endif /*TEST_CHRONO*/