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Annotation of gforth/select.c, revision 1.3

1.3     ! 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: 
1.1       anton      23: #include <sys/time.h>
                     24: 
                     25: void select(int n, int a, int b, int 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;
                     34:    if(time1.tv_usec >= 1000000)
                     35:      {
                     36:        time1.tv_sec += time1.tv_usec / 1000000;
                     37:        time1.tv_usec %= 1000000;
                     38:      }
                     39:    do
                     40:      {
                     41:        gettimeofday(&time2,&zone1);
                     42:      }
                     43:    while(time2.tv_sec < time1.tv_sec);
                     44: 
                     45:    do
                     46:      {
                     47:        gettimeofday(&time2,&zone1);
                     48:      }
                     49:    while(time2.tv_usec < time1.tv_usec &&
                     50:         time2.tv_sec == time1.tv_sec);
                     51: 
                     52: }