rom/timer/cmptime.c

   1 /*
   2     Copyright © 1995-2011, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: CmpTime() - compare two time values.
   6     Lang: english
   7 */
   8
   9 #include <timer_intern.h>
  10 #include "timer_macros.h"
  11
  12 /*****************************************************************************
  13
  14     NAME */
  15 #include <devices/timer.h>
  16 #include <proto/timer.h>
  17
  18         AROS_LH2(LONG, CmpTime,
  19
  20 /*  SYNOPSIS */
  21         AROS_LHA(struct timeval *, dest, A0),
  22         AROS_LHA(struct timeval *, src, A1),
  23
  24 /*  LOCATION */
  25         struct Device *, TimerBase, 9, Timer)
  26
  27 /*  FUNCTION
  28         CmpTime() will compare two timeval's for magnitude, and return
  29         which is the larger.
  30
  31     INPUTS
  32         dest    -   Destination timeval
  33         src     -   Source timeval
  34
  35     RESULT
  36         -1 if dest has more time than src (i.e. dest > src)
  37          0 if dest and src are the same (i.e. dest == src)
  38         +1 if dest has less time than src (i.e. dest < src)
  39
  40     NOTES
  41         This function is safe to call from interrupts.
  42
  43     EXAMPLE
  44
  45     BUGS
  46         The registers A0 and A1 may not be preserved.
  47
  48     SEE ALSO
  49         AddTime(), SubTime()
  50
  51     INTERNALS
  52
  53     HISTORY
  54         18-02-1997  iaint   Implemented.
  55
  56 *****************************************************************************/
  57 {
  58     AROS_LIBFUNC_INIT
  59
  60     return CMPTIME(dest, src);
  61
  62     AROS_LIBFUNC_EXIT
  63 } /* CmpTime */