rom/timer/subtime.c

   1 /*
   2     Copyright © 1995-2011, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: SubTime - subtract two timevals from each other.
   6     Lang: english
   7 */
   8
   9 #include <devices/timer.h>
  10
  11 #include "timer_macros.h"
  12
  13 /*****************************************************************************
  14
  15     NAME */
  16 #include <devices/timer.h>
  17 #include <proto/timer.h>
  18
  19         AROS_LH2(void, SubTime,
  20
  21 /*  SYNOPSIS */
  22         AROS_LHA(struct timeval *, dest, A0),
  23         AROS_LHA(struct timeval *, src, A1),
  24
  25 /*  LOCATION */
  26         struct Device *, TimerBase, 8, Timer)
  27
  28 /*  FUNCTION
  29         SubTime() will subtract the src timeval from the destination
  30         timeval, ie "dest - src --> dest".
  31
  32     INPUTS
  33         dest    -   Destination timeval
  34         src     -   Source timeval
  35
  36     RESULT
  37         The timeval dest will contain the sum (dest - src).
  38
  39     NOTES
  40         This function is safe to call from interrupts.
  41
  42     EXAMPLE
  43
  44     BUGS
  45         May not preserve registers.
  46
  47     SEE ALSO
  48         AddTime(), CmpTime()
  49
  50     INTERNALS
  51
  52     HISTORY
  53         18-02-1997  iaint   Implemented.
  54
  55 *****************************************************************************/
  56 {
  57     AROS_LIBFUNC_INIT
  58
  59     SUBTIME(dest, src);
  60
  61     AROS_LIBFUNC_EXIT
  62
  63 } /* SubTime */