Annotation of gforth/engine/select.c, revision 1.1

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;
        !            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: }

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