debuggers.hg

view tools/vnet/vnetd/select.h @ 0:7d21f7218375

Exact replica of unstable on 051908 + README-this
author Mukesh Rathor
date Mon May 19 15:34:57 2008 -0700 (2008-05-19)
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1 /*
2 * Copyright (C) 2003 - 2004 Mike Wray <mike.wray@hp.com>.
3 *
4 * This library is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU Lesser General Public License as
6 * published by the Free Software Foundation; either version 2.1 of the
7 * License, or (at your option) any later version. This library is
8 * distributed in the hope that it will be useful, but WITHOUT ANY
9 * WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE.
11 * See the GNU Lesser General Public License for more details.
12 *
13 * You should have received a copy of the GNU Lesser General Public License
14 * along with this library; if not, write to the Free Software Foundation,
15 * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
16 */
17 #ifndef _VFC_SELECT_H_
18 #define _VFC_SELECT_H_
20 /** Set of file descriptors for select.
21 */
22 typedef struct SelectSet {
23 int n;
24 fd_set rd, wr, er;
25 } SelectSet;
27 enum {
28 SELECT_READ = 1,
29 SELECT_WRITE = 2,
30 SELECT_ERROR = 4,
31 };
33 extern void SelectSet_zero(SelectSet *set);
34 extern void SelectSet_add(SelectSet *set, int fd, int mode);
35 extern void SelectSet_add_read(SelectSet *set, int fd);
36 extern void SelectSet_add_write(SelectSet *set, int fd);
37 extern void SelectSet_add_error(SelectSet *set, int fd);
38 extern int SelectSet_select(SelectSet *set, struct timeval *timeout);
40 static inline int SelectSet_in(SelectSet *set, int fd){
41 return ((fd >= 0)
42 ? ((FD_ISSET(fd, &set->rd) ? SELECT_READ : 0) |
43 (FD_ISSET(fd, &set->wr) ? SELECT_WRITE : 0) |
44 (FD_ISSET(fd, &set->er) ? SELECT_ERROR : 0))
45 : 0);
46 }
48 static inline int SelectSet_in_read(SelectSet *set, int fd){
49 return (fd >= 0) && FD_ISSET(fd, &set->rd);
50 }
52 static inline int SelectSet_in_write(SelectSet *set, int fd){
53 return (fd >= 0) && FD_ISSET(fd, &set->wr);
54 }
56 static inline int SelectSet_in_err(SelectSet *set, int fd){
57 return (fd >= 0) && FD_ISSET(fd, &set->er);
58 }
60 #endif /* ! _VFC_SELECT_H_ */