1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
/* $Id: fdwait.C,v 1.3 1999/03/15 01:13:29 dm Exp $ */
/*
*
* Copyright (C) 1998 David Mazieres (dm@uun.org)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*
*/
#include "amisc.h"
int
fdwait (int fd, selop op, timeval *tvp)
{
static int nfd;
static fd_set *fds;
assert (fd >= 0);
if (fd >= nfd) {
// nfd = max (fd + 1, FD_SETSIZE);
nfd = fd + 1;
nfd = nfd + 0x3f & ~0x3f;
xfree (fds);
fds = (fd_set *) xmalloc (nfd >> 3);
bzero (fds, nfd >> 3);
}
FD_SET (fd, fds);
int res = 0; // XXX - egcs
switch (op) {
case selread:
res = select (fd + 1, fds, NULL, NULL, tvp);
break;
case selwrite:
res = select (fd + 1, NULL, fds, NULL, tvp);
break;
default:
panic ("fdwait: bad operation\n");
break;
}
FD_CLR (fd, fds);
return res;
}
|
