tests/test-times.c

   1 /* Test of times function.
   2    Copyright (C) 2008-2024 Free Software Foundation, Inc.
   3
   4    This program is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation, either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  16
  17 /* Written by Simon Josefsson <simon@josefsson.org>, 2008.  */
  18
  19 #include <config.h>
  20
  21 #include <sys/times.h>
  22
  23 #include "signature.h"
  24 SIGNATURE_CHECK (times, clock_t, (struct tms *));
  25
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <stdint.h>
  29 #include <unistd.h>
  30 #include <math.h>
  31
  32 static int
  33 doublecmp (const void *p, const void *q)
  34 {
  35   double a = *(double *) p;
  36   double b = *(double *) q;
  37
  38   return a < b ? -1 : a > b ? 1 : 0;
  39 }
  40
  41 int
  42 main (int argc, char *argv[])
  43 {
  44   struct tms tms;
  45   clock_t t;
  46 #ifndef _SC_CLK_TCK
  47   clock_t clk_tck = CLK_TCK;
  48 #else
  49   clock_t clk_tck = sysconf (_SC_CLK_TCK);
  50 #endif
  51
  52   t = times (&tms);
  53   if (t == (clock_t) -1)
  54     {
  55       perror ("times");
  56       return EXIT_FAILURE;
  57     }
  58
  59   if (argc > 1)
  60     {
  61       printf ("clk_tck %ld\n", (long int) clk_tck);
  62
  63       printf ("t %ld\n", (long int) t);
  64       printf ("tms.tms_utime %ldms\n", ((long int) tms.tms_utime * 1000) / (long int) clk_tck);
  65       printf ("tms.tms_stime %ldms\n", ((long int) tms.tms_stime * 1000) / (long int) clk_tck);
  66       printf ("tms.tms_cutime %ldms\n", ((long int) tms.tms_cutime * 1000) / (long int) clk_tck);
  67       printf ("tms.tms_cstime %ldms\n", ((long int) tms.tms_cstime * 1000) / (long int) clk_tck);
  68     }
  69
  70   if (argc > 1)
  71     {
  72       size_t size = atoi (argv[1]);
  73       double *base;
  74       size_t i;
  75
  76       base = malloc (size * sizeof (double));
  77
  78       for (i = 0; i < size; i++)
  79         base[i] = i * i;
  80
  81       qsort (base, size, sizeof (double), doublecmp);
  82
  83       free (base);
  84     }
  85
  86   t = times (&tms);
  87   if (t == (clock_t) -1)
  88     {
  89       perror ("times");
  90       return EXIT_FAILURE;
  91     }
  92
  93   if (argc > 1)
  94     {
  95       printf ("clk_tck %ld\n", (long int) clk_tck);
  96
  97       printf ("t %ld\n", (long int) t);
  98       printf ("tms.tms_utime %ldms\n", ((long int) tms.tms_utime * 1000) / (long int) clk_tck);
  99       printf ("tms.tms_stime %ldms\n", ((long int) tms.tms_stime * 1000) / (long int) clk_tck);
 100       printf ("tms.tms_cutime %ldms\n", ((long int) tms.tms_cutime * 1000) / (long int) clk_tck);
 101       printf ("tms.tms_cstime %ldms\n", ((long int) tms.tms_cstime * 1000) / (long int) clk_tck);
 102     }
 103
 104   return 0;
 105 }