common.c

   1 /*
   2  * Copyright (c) 2017 Mohamed Aslan <maslan@sce.carleton.ca>
   3  *
   4  * Permission to use, copy, modify, and distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #include <stdio.h>
  18 #include <stdarg.h>
  19 #include <err.h>
  20 #include <sys/event.h>
  21 #include "common.h"
  22
  23
  24 /*
  25  * one shot timer
  26  */
  27 void
  28 atimer(int ev_queue, int id, unsigned int t)
  29 {
  30         struct kevent           kev;
  31
  32         EV_SET(&kev, id, EVFILT_TIMER, EV_ADD | EV_ENABLE | EV_ONESHOT, 0, t, NULL);
  33         if ((kevent(ev_queue, &kev, 1, NULL, 0, NULL)) == -1)
  34                 err(1, "timer");
  35 }
  36
  37 /*
  38  * periodic timer with period p
  39  */
  40 void
  41 timer(int ev_queue, int id, unsigned int p)
  42 {
  43         struct kevent           kev;
  44
  45         EV_SET(&kev, id, EVFILT_TIMER, EV_ADD | EV_ENABLE, 0, p, NULL);
  46         if ((kevent(ev_queue, &kev, 1, NULL, 0, NULL)) == -1)
  47                 err(1, "timer");
  48 }
  49
  50 void
  51 log_init(struct log *lg)
  52 {
  53         if (lg->type == LOG_CSV) {
  54                 if ((lg->fd = fopen(lg->param.filename, "w")) == NULL)
  55                         errx(1, "error creating log file.");
  56         }
  57 }
  58
  59 void
  60 log_free(struct log *lg)
  61 {
  62         if (lg->type == LOG_CSV)
  63                 fclose(lg->fd);
  64 }
  65
  66 void
  67 f_log(struct log *lg, const char *fmt, ...)
  68 {
  69         va_list                 ap;
  70
  71         va_start(ap, fmt);
  72         if (lg->type == LOG_CSV) {
  73                 if (vfprintf(lg->fd, fmt, ap) < -1)
  74                         errx(1, "vfprintf");
  75         }
  76         va_end(ap);
  77 }