File:  [gforth] / gforth / engine / select.c
Revision 1.4: download - view: text, annotated - select for diffs
Sun Dec 13 23:30:03 1998 UTC (23 years, 8 months ago) by pazsan
Branches: MAIN
CVS tags: v0-4-0, HEAD
Added some documentation (files stup, blocks stub, Mini-OOF implementation)
Added Benchres for my machine
made DOS and Win32 compile and run
New gforthmi.bat script for DOS - needs a temporary file for the commands
instead of the -e option.
Added select.o again for DOS (DJGPP's select is broken wrt timing)
Improved select.c
Bug with DOS: engine-ditc doesn't compile with optimization on. Maybe I need
to get a new GCC version for DOS?

    1: /* select replacement for DOS computers for ms only
    2: 
    3:   Copyright (C) 1995,1998 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:      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) ||
   41:            ((time2.tv_usec < time1.tv_usec) &&
   42: 	    (time2.tv_sec == time1.tv_sec)));
   43: }

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