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/*
* Ouroboros - Copyright (C) 2016 - 2017
*
* Test of the timer wheel
*
* Dimitri Staessens <dimitri.staessens@intec.ugent.be>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "timerwheel.c"
#include <pthread.h>
#include <time.h>
#include <stdlib.h>
#define MAX_ELEMENTS 100
#define MAX_RESOLUTION 10 /* ms */
#define MAX_ADDITIONS 1000
int total;
int add(void * o)
{
total += *((int *) o);
return 0;
}
int timerwheel_test(int argc, char ** argv)
{
struct timerwheel * tw;
long resolution;
long elements;
struct timespec wait;
int additions;
int check_total = 0;
int i;
(void) argc;
(void) argv;
total = 0;
srand(time(NULL));
resolution = rand() % (MAX_RESOLUTION - 1) + 1;
elements = rand() % (MAX_ELEMENTS - 10) + 10;
tw = timerwheel_create(resolution, resolution * elements);
if (tw == NULL) {
printf("Failed to create timerwheel.\n");
return -1;
}
wait.tv_sec = (resolution * elements) / 1000;
wait.tv_nsec = ((resolution * elements) % 1000) * MILLION;
additions = rand() % MAX_ADDITIONS + 1000;
for (i = 0; i < additions; ++i) {
int delay = rand() % (resolution * elements);
int var = rand() % 5;
check_total += var;
if (timerwheel_add(tw,
(void (*)(void *)) add,
(void *) &var,
sizeof(var),
delay)) {
printf("Failed to add function.");
return -1;
}
}
nanosleep(&wait, NULL);
/* On some systems and VMs, the scheduler may be too slow. */
if (total != check_total)
nanosleep(&wait, NULL);
timerwheel_destroy(tw);
if (total != check_total) {
printf("Totals do not match.\n");
return -1;
}
return 0;
}
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