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3ef31cb5 KH |
1 | /* sysselect.h - System-dependent definitions for the select function. |
2 | Copyright (C) 1995 Free Software Foundation, Inc. | |
3 | ||
4 | This file is part of GNU Emacs. | |
5 | ||
6 | GNU Emacs is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2, or (at your option) | |
9 | any later version. | |
10 | ||
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU Emacs; see the file COPYING. If not, write to | |
3b7ad313 EN |
18 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
19 | Boston, MA 02111-1307, USA. */ | |
3ef31cb5 KH |
20 | |
21 | #ifdef HAVE_SYS_SELECT | |
22 | #include <sys/select.h> | |
23 | #endif | |
24 | ||
25 | #ifdef FD_SET | |
26 | #ifdef FD_SETSIZE | |
27 | #define MAXDESC FD_SETSIZE | |
28 | #else | |
29 | #define MAXDESC 64 | |
30 | #endif | |
31 | #define SELECT_TYPE fd_set | |
32 | #else /* no FD_SET */ | |
33 | #define MAXDESC 32 | |
34 | #define SELECT_TYPE int | |
35 | ||
36 | /* Define the macros to access a single-int bitmap of descriptors. */ | |
37 | #define FD_SET(n, p) (*(p) |= (1 << (n))) | |
38 | #define FD_CLR(n, p) (*(p) &= ~(1 << (n))) | |
39 | #define FD_ISSET(n, p) (*(p) & (1 << (n))) | |
40 | #define FD_ZERO(p) (*(p) = 0) | |
41 | #endif /* no FD_SET */ | |
42 | ||
43 | #if !defined (HAVE_SELECT) || defined (BROKEN_SELECT_NON_X) | |
44 | #define select sys_select | |
45 | #endif | |
6b61353c KH |
46 | |
47 | /* arch-tag: 36d05500-8cf6-4847-8e78-6721f18c06ef | |
48 | (do not change this comment) */ |