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