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/* Implement timing-related runtime actions for CHILL.
Copyright (C) 1992,1993 Free Software Foundation, Inc.
Author: Wilfried Moser
This file is part of GNU CC.
GNU CC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GNU CC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU CC; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
#include "rts.h"
/*
* function __remaintime
*
* parameters:
* since pointer to the initial RtsTime
* dur the duration value
* t pointer to the remaining RtsTime
*
* returns:
* int 0 .. there is a remaining time
* 1 .. there is no remaining time
*
* exceptions:
* none
*
* abstract:
* This function writes to t the remaining duration value in RtsTime format
* from a given start (since) and the current RtsTime.
*
*/
extern void __convert_duration_rtstime (unsigned long dur, RtsTime *t);
int
__remaintime (since, dur, t)
RtsTime *since;
unsigned long dur;
RtsTime *t;
{
RtsTime now, dur_in_rtstime, tmp, diff;
__rtstime (&now);
__convert_duration_rtstime (dur, &dur_in_rtstime);
tmp.secs = since->secs;
tmp.nanosecs = since->nanosecs;
/* calculate the difference of absolute times */
if (tmp.nanosecs > now.nanosecs)
{
tmp.secs--;
tmp.nanosecs += 1000000000;
}
diff.secs = now.secs - tmp.secs;
diff.nanosecs = now.nanosecs - tmp.nanosecs;
/* substract diff from duration */
if (diff.nanosecs > dur_in_rtstime.nanosecs)
{
dur_in_rtstime.secs--;
dur_in_rtstime.nanosecs += 1000000000;
}
t->secs = dur_in_rtstime.secs - diff.secs;
t->nanosecs = dur_in_rtstime.nanosecs - diff.nanosecs;
if (t->secs > dur_in_rtstime.secs)
return 1;
else
return 0;
}
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