kc3-lang/gnulib/tests/test-times.c

• Show log

  Commit

• Hash : 7b089321
  Author :
  Date : 2025-01-01T09:24:36
  

  maint: run 'make update-copyright'
  

Download

• tests/test-times.c

• /* Test of times function.
     Copyright (C) 2008-2025 Free Software Foundation, Inc.
  
     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 3 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, see <https://www.gnu.org/licenses/>.  */
  
  /* Written by Simon Josefsson <simon@josefsson.org>, 2008.  */
  
  #include <config.h>
  
  #include <sys/times.h>
  
  #include "signature.h"
  SIGNATURE_CHECK (times, clock_t, (struct tms *));
  
  #include <stdio.h>
  #include <stdlib.h>
  #include <stdint.h>
  #include <unistd.h>
  #include <math.h>
  
  static int
  doublecmp (const void *p, const void *q)
  {
    double a = *(double *) p;
    double b = *(double *) q;
  
    return a < b ? -1 : a > b ? 1 : 0;
  }
  
  int
  main (int argc, char *argv[])
  {
    struct tms tms;
    clock_t t;
  #ifndef _SC_CLK_TCK
    clock_t clk_tck = CLK_TCK;
  #else
    clock_t clk_tck = sysconf (_SC_CLK_TCK);
  #endif
  
    t = times (&tms);
    if (t == (clock_t) -1)
      {
        perror ("times");
        return EXIT_FAILURE;
      }
  
    if (argc > 1)
      {
        printf ("clk_tck %ld\n", (long int) clk_tck);
  
        printf ("t %ld\n", (long int) t);
        printf ("tms.tms_utime %ldms\n", ((long int) tms.tms_utime * 1000) / (long int) clk_tck);
        printf ("tms.tms_stime %ldms\n", ((long int) tms.tms_stime * 1000) / (long int) clk_tck);
        printf ("tms.tms_cutime %ldms\n", ((long int) tms.tms_cutime * 1000) / (long int) clk_tck);
        printf ("tms.tms_cstime %ldms\n", ((long int) tms.tms_cstime * 1000) / (long int) clk_tck);
      }
  
    if (argc > 1)
      {
        size_t size = atoi (argv[1]);
        double *base;
        size_t i;
  
        base = malloc (size * sizeof (double));
  
        for (i = 0; i < size; i++)
          base[i] = i * i;
  
        qsort (base, size, sizeof (double), doublecmp);
  
        free (base);
      }
  
    t = times (&tms);
    if (t == (clock_t) -1)
      {
        perror ("times");
        return EXIT_FAILURE;
      }
  
    if (argc > 1)
      {
        printf ("clk_tck %ld\n", (long int) clk_tck);
  
        printf ("t %ld\n", (long int) t);
        printf ("tms.tms_utime %ldms\n", ((long int) tms.tms_utime * 1000) / (long int) clk_tck);
        printf ("tms.tms_stime %ldms\n", ((long int) tms.tms_stime * 1000) / (long int) clk_tck);
        printf ("tms.tms_cutime %ldms\n", ((long int) tms.tms_cutime * 1000) / (long int) clk_tck);
        printf ("tms.tms_cstime %ldms\n", ((long int) tms.tms_cstime * 1000) / (long int) clk_tck);
      }
  
    return 0;
  }
  

Download