1/* Implement timing-related runtime actions for CHILL. 2 Copyright (C) 1992,1993 Free Software Foundation, Inc. 3 Author: Wilfried Moser 4 5 This file is part of GNU CC. 6 7 GNU CC is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 2, or (at your option) 10 any later version. 11 12 GNU CC is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with GNU CC; see the file COPYING. If not, write to 19 the Free Software Foundation, 59 Temple Place - Suite 330, 20Boston, MA 02111-1307, USA. */ 21 22/* As a special exception, if you link this library with other files, 23 some of which are compiled with GCC, to produce an executable, 24 this library does not by itself cause the resulting executable 25 to be covered by the GNU General Public License. 26 This exception does not however invalidate any other reasons why 27 the executable file might be covered by the GNU General Public License. */ 28 29#include "rts.h" 30 31/* 32 * function __remaintime 33 * 34 * parameters: 35 * since pointer to the initial RtsTime 36 * dur the duration value 37 * t pointer to the remaining RtsTime 38 * 39 * returns: 40 * int 0 .. there is a remaining time 41 * 1 .. there is no remaining time 42 * 43 * exceptions: 44 * none 45 * 46 * abstract: 47 * This function writes to t the remaining duration value in RtsTime format 48 * from a given start (since) and the current RtsTime. 49 * 50 */ 51 52extern void __convert_duration_rtstime (unsigned long dur, RtsTime *t); 53 54int 55 __remaintime (since, dur, t) 56RtsTime *since; 57unsigned long dur; 58RtsTime *t; 59{ 60 RtsTime now, dur_in_rtstime, tmp, diff; 61 62 __rtstime (&now); 63 __convert_duration_rtstime (dur, &dur_in_rtstime); 64 65 tmp.secs = since->secs; 66 tmp.nanosecs = since->nanosecs; 67 68 /* calculate the difference of absolute times */ 69 if (tmp.nanosecs > now.nanosecs) 70 { 71 tmp.secs--; 72 tmp.nanosecs += 1000000000; 73 } 74 diff.secs = now.secs - tmp.secs; 75 diff.nanosecs = now.nanosecs - tmp.nanosecs; 76 77 /* substract diff from duration */ 78 if (diff.nanosecs > dur_in_rtstime.nanosecs) 79 { 80 dur_in_rtstime.secs--; 81 dur_in_rtstime.nanosecs += 1000000000; 82 } 83 84 t->secs = dur_in_rtstime.secs - diff.secs; 85 t->nanosecs = dur_in_rtstime.nanosecs - diff.nanosecs; 86 87 if (t->secs > dur_in_rtstime.secs) 88 return 1; 89 else 90 return 0; 91} 92