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author Karl Berry <karl@freefriends.org>
date Fri, 16 Aug 2013 06:32:22 -0700
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1 /* Test of times function.
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2 Copyright (C) 2008-2013 Free Software Foundation, Inc.
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3
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4 This program is free software: you can redistribute it and/or modify
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5 it under the terms of the GNU General Public License as published by
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6 the Free Software Foundation; either version 3 of the License, or
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7 (at your option) any later version.
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8
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9 This program is distributed in the hope that it will be useful,
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10 but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 GNU General Public License for more details.
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13
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14 You should have received a copy of the GNU General Public License
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15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
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16
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17 /* Written by Simon Josefsson <simon@josefsson.org>, 2008. */
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18
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19 #include <config.h>
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20
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21 #include <sys/times.h>
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22
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23 #include "signature.h"
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24 SIGNATURE_CHECK (times, clock_t, (struct tms *));
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25
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26 #include <stdio.h>
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27 #include <stdlib.h>
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28 #include <stdint.h>
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29 #include <unistd.h>
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30 #include <math.h>
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31
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32 static int
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33 doublecmp (const void *p, const void *q)
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34 {
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35 double a = *(double *) p;
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36 double b = *(double *) q;
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37
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38 return a < b;
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39 }
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40
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41 int
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42 main (int argc, char *argv[])
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43 {
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44 struct tms tms;
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45 clock_t t;
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46 #ifndef _SC_CLK_TCK
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47 clock_t clk_tck = CLK_TCK;
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48 #else
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49 clock_t clk_tck = sysconf (_SC_CLK_TCK);
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50 #endif
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51
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52 t = times (&tms);
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53 if (t == (clock_t) -1)
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54 {
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55 perror ("times");
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56 return EXIT_FAILURE;
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57 }
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58
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59 if (argc > 1)
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60 {
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61 printf ("clk_tck %ld\n", (long int) clk_tck);
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62
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63 printf ("t %ld\n", (long int) t);
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64 printf ("tms.tms_utime %ldms\n", ((long int) tms.tms_utime * 1000) / clk_tck);
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65 printf ("tms.tms_stime %ldms\n", ((long int) tms.tms_stime * 1000) / clk_tck);
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66 printf ("tms.tms_cutime %ldms\n", ((long int) tms.tms_cutime * 1000) / clk_tck);
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67 printf ("tms.tms_cstime %ldms\n", ((long int) tms.tms_cstime * 1000) / clk_tck);
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68 }
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69
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70 if (argc > 1)
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71 {
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72 size_t size = atoi (argv[1]);
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73 double *base;
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74 size_t i;
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75
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76 base = malloc (size * sizeof (double));
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77
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78 for (i = 0; i < size; i++)
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79 base[i] = i * i;
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80
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81 qsort (base, size, sizeof (double), doublecmp);
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82
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83 free (base);
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84 }
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85
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86 t = times (&tms);
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87 if (t == (clock_t) -1)
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88 {
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89 perror ("times");
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90 return EXIT_FAILURE;
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91 }
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92
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93 if (argc > 1)
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94 {
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95 printf ("clk_tck %ld\n", (long int) clk_tck);
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96
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97 printf ("t %ld\n", (long int) t);
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98 printf ("tms.tms_utime %ldms\n", ((long int) tms.tms_utime * 1000) / clk_tck);
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99 printf ("tms.tms_stime %ldms\n", ((long int) tms.tms_stime * 1000) / clk_tck);
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100 printf ("tms.tms_cutime %ldms\n", ((long int) tms.tms_cutime * 1000) / clk_tck);
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101 printf ("tms.tms_cstime %ldms\n", ((long int) tms.tms_cstime * 1000) / clk_tck);
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102 }
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103
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104 return 0;
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105 }