macosx/JackMachTime.c

   1 /*
   2 Copyright (C) 2001-2003 Paul Davis
   3 Copyright (C) 2004-2008 Grame
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU Lesser General Public License as published by
   7 the Free Software Foundation; either version 2.1 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU Lesser General Public License for more details.
  14
  15 You should have received a copy of the GNU Lesser General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18
  19 */
  20
  21 #include "JackTime.h"
  22 #include "JackError.h"
  23 #include "JackTypes.h"
  24 #include <mach/mach_time.h>
  25 #include <unistd.h>
  26
  27 static double __jack_time_ratio;
  28
  29 SERVER_EXPORT void JackSleep(long usec)
  30 {
  31         usleep(usec);
  32 }
  33
  34 /* This should only be called ONCE per process. */
  35 SERVER_EXPORT void InitTime()
  36 {
  37         mach_timebase_info_data_t info;
  38         mach_timebase_info(&info);
  39         __jack_time_ratio = ((float)info.numer / info.denom) / 1000;
  40 }
  41
  42 SERVER_EXPORT void EndTime()
  43 {}
  44
  45 SERVER_EXPORT jack_time_t GetMicroSeconds(void)
  46 {
  47     return (jack_time_t) (mach_absolute_time () * __jack_time_ratio);
  48 }
  49
  50 void SetClockSource(jack_timer_type_t source)
  51 {}
  52
  53 const char* ClockSourceName(jack_timer_type_t source)
  54 {
  55     return "";
  56 }