util/mmaptime_test.c

   1 /*
   2  * Copyright (c) 1998 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * 3. Neither the name of the Institute nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #ifdef HAVE_CONFIG_H
  35 #include <config.h>
  36 #endif
  37
  38 RCSID("$Id$");
  39
  40 #ifdef USE_MMAPTIME
  41
  42 #include <stdio.h>
  43 #include <time.h>
  44 #include <errno.h>
  45 #include <err.h>
  46 #include "mmaptime.h"
  47
  48 static void
  49 print_time_diff(char *str, struct timeval *tv, struct timeval *tv2)
  50 {
  51     struct timeval t;
  52
  53     t.tv_sec = tv2->tv_sec - tv->tv_sec;
  54     t.tv_usec = tv2->tv_usec - tv->tv_usec;
  55     if (t.tv_usec < 0) {
  56         t.tv_usec += 100000;
  57         --t.tv_sec;
  58     }
  59
  60     printf("%s: %f\n",
  61            str,
  62            (double)t.tv_sec +
  63            (double)t.tv_usec / 100000 );
  64 }
  65
  66
  67 int main(int argc, char **argv)
  68 {
  69     struct timeval t, t2, start, stop;
  70     int i, times;
  71     time_t tim;
  72
  73     i = mmaptime_probe();
  74     if (i == EOPNOTSUPP) {
  75         errx(1, "You don't have support for mmaptime\n"
  76              "Try run configure with --enable-mmaptime");
  77     } else if (i) {
  78         err(1, "probe");
  79     }
  80
  81     if (!(argc == 2 && sscanf(argv[1], "%d", &times) == 1))
  82         times = 100000;
  83
  84     /* Get date two different ways */
  85
  86     if (mmaptime_gettimeofday(&t, NULL))
  87         err(1, "mmaptime_gettimeofday: here am I");
  88     if (gettimeofday(&t2, NULL))
  89         err(1, "gettimeofday: this should not happen");
  90     tim = t.tv_sec;
  91     printf("mmaptime: %s", ctime(&tim));
  92     tim = t2.tv_sec;
  93     printf("gettimeofday: %s", ctime(&tim));
  94
  95     print_time_diff("Diff", &t, &t2);
  96
  97     /* Test run */
  98
  99     printf("Doing %d tests of mmaptime_gettimeofday()\n", times);
 100     if (mmaptime_gettimeofday(&start, NULL))
 101         err(1, "mmaptime_gettimeofday: start");
 102     for (i = 0 ; i < times ; i++) {
 103         if (mmaptime_gettimeofday(&t, NULL))
 104             err(1, "mmaptime_gettimeofday: running");
 105     }
 106     if (mmaptime_gettimeofday(&stop, NULL))
 107         err(1, "mmaptime_gettimeofday: stop");
 108     print_time_diff("End time", &start, &stop);
 109
 110     mmaptime_close();
 111
 112     /* Do the same with gettimeofday */
 113
 114     printf("Doing %d tests of gettimeofday()\n", times);
 115     if (gettimeofday(&start, NULL))
 116         err(1, "gettimeofday: start");
 117     for (i = 0 ; i < times ; i++) {
 118         if (gettimeofday(&t, NULL))
 119             err(1, "gettimeofday: running");
 120     }
 121     if (gettimeofday(&stop, NULL))
 122         err(1, "gettimeofday: stop");
 123     print_time_diff("End time", &start, &stop);
 124
 125     return 0;
 126 }
 127
 128 #else /* !USE_MMAPTIME */
 129
 130 int
 131 main(int argc, char **argv)
 132 {
 133     return 0;
 134 }
 135
 136 #endif /* USE_MMAPTIME */