File:  [gforth] / gforth / engine / select.c
Revision 1.9: download - view: text, annotated - select for diffs
Mon Dec 31 19:02:25 2007 UTC (13 years, 5 months ago) by anton
Branches: MAIN
CVS tags: v0-7-0, HEAD
updated copyright year after changing license notice

    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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