libjack/time.c

   1 /* -*- mode: c; c-file-style: "bsd"; -*- */
   2 /*
   3     Copyright (C) 2001-2003 Paul Davis
   4     Copyright (C) 2005 Jussi Laako
   5
   6     This program is free software; you can redistribute it and/or modify
   7     it under the terms of the GNU Lesser General Public License as published by
   8     the Free Software Foundation; either version 2.1 of the License, or
   9     (at your option) any later version.
  10
  11     This program is distributed in the hope that it will be useful,
  12     but WITHOUT ANY WARRANTY; without even the implied warranty of
  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14     GNU Lesser General Public License for more details.
  15
  16     You should have received a copy of the GNU Lesser General Public License
  17     along with this program; if not, write to the Free Software
  18     Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19
  20 */
  21
  22 #include <config.h>
  23
  24 #include <errno.h>
  25 #include <fcntl.h>
  26 #include <stdio.h>
  27 #ifdef HAVE_STDINT_H
  28 #include <stdint.h>
  29 #endif
  30 #include <string.h>
  31 #include <sys/types.h>
  32 #include <sys/mman.h>
  33
  34 #include <jack/internal.h>
  35 #include <jack/jack.h>
  36 #include <jack/engine.h>
  37
  38 #include <sysdeps/time.h>
  39 #include <sysdeps/cycles.h>
  40
  41 #include "local.h"
  42
  43 const char*
  44 jack_clock_source_name (jack_timer_type_t src)
  45 {
  46         switch (src) {
  47         case JACK_TIMER_CYCLE_COUNTER:
  48                 return "cycle counter";
  49         case JACK_TIMER_HPET:
  50                 return "hpet";
  51         case JACK_TIMER_SYSTEM_CLOCK:
  52 #ifdef HAVE_CLOCK_GETTIME
  53                 return "system clock via clock_gettime";
  54 #else
  55                 return "system clock via gettimeofday";
  56 #endif
  57         }
  58
  59         /* what is wrong with gcc ? */
  60
  61         return "unknown";
  62 }
  63
  64 #ifndef HAVE_CLOCK_GETTIME
  65
  66 jack_time_t
  67 jack_get_microseconds_from_system (void) {
  68         jack_time_t jackTime;
  69         struct timeval tv;
  70
  71         gettimeofday (&tv, NULL);
  72         jackTime = (jack_time_t) tv.tv_sec * 1000000 + (jack_time_t) tv.tv_usec;
  73         return jackTime;
  74 }
  75
  76 #else
  77
  78 jack_time_t
  79 jack_get_microseconds_from_system (void) {
  80         jack_time_t jackTime;
  81         struct timespec time;
  82
  83         clock_gettime(CLOCK_MONOTONIC, &time);
  84         jackTime = (jack_time_t) time.tv_sec * 1e6 +
  85                 (jack_time_t) time.tv_nsec / 1e3;
  86         return jackTime;
  87 }
  88
  89 #endif /* HAVE_CLOCK_GETTIME */
  90
  91 /* everything below here should be system-dependent */
  92
  93 #include <sysdeps/time.c>
  94
  95