Annotation of gforth/engine/select.c, revision 1.2
1.1 anton 1: /* select replacement for DOS computers for ms only
2:
3: Copyright (C) 1995 Free Software Foundation, Inc.
4:
5: This file is part of Gforth.
6:
7: Gforth is free software; you can redistribute it and/or
8: modify it under the terms of the GNU General Public License
9: as published by the Free Software Foundation; either version 2
10: of the License, or (at your option) any later version.
11:
12: This program 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 this program; if not, write to the Free Software
19: Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20: */
21:
22:
23: #include <sys/time.h>
24:
25: int select(int n, fd_set *a, fd_set *b, fd_set *c, struct timeval * timeout)
26: {
27: struct timeval time1;
28: struct timeval time2;
29: struct timezone zone1;
30:
31: gettimeofday(&time1,&zone1);
32: time1.tv_sec += timeout->tv_sec;
33: time1.tv_usec += timeout->tv_usec;
1.2 ! pazsan 34: if(time1.tv_usec >= 1000000) {
! 35: time1.tv_sec += time1.tv_usec / 1000000;
! 36: time1.tv_usec %= 1000000;
! 37: }
! 38: do {
! 39: gettimeofday(&time2,&zone1);
! 40: } while(time2.tv_sec < time1.tv_sec);
1.1 anton 41:
1.2 ! pazsan 42: do {
! 43: gettimeofday(&time2,&zone1);
! 44: } while(time2.tv_usec < time1.tv_usec &&
! 45: time2.tv_sec == time1.tv_sec);
1.1 anton 46: }
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