1: /* select replacement for DOS computers for ms only
2:
3: Copyright (C) 1995,1998,2000,2003,2007 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 3
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, see http://www.gnu.org/licenses/.
19: */
20:
21:
22: #include <sys/time.h>
23:
24: int select(int n, fd_set *a, fd_set *b, fd_set *c, struct timeval * timeout)
25: {
26: struct timeval time1;
27: struct timeval time2;
28: struct timezone zone1;
29:
30: gettimeofday(&time1,&zone1);
31: time1.tv_sec += timeout->tv_sec;
32: time1.tv_usec += timeout->tv_usec;
33: if(time1.tv_usec >= 1000000) {
34: time1.tv_sec += time1.tv_usec / 1000000;
35: time1.tv_usec %= 1000000;
36: }
37: do {
38: gettimeofday(&time2,&zone1);
39: } while((time2.tv_sec < time1.tv_sec) ||
40: ((time2.tv_usec < time1.tv_usec) &&
41: (time2.tv_sec == time1.tv_sec)));
42: }
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