---

---

---

01: /* Copyright (C) 1997, 2001, 2006, 2009 Free Software Foundation, Inc.
02:    This file is part of the GNU C Library.
03: 
04:    The GNU C Library is free software; you can redistribute it and/or
05:    modify it under the terms of the GNU Lesser General Public
06:    License as published by the Free Software Foundation; either
07:    version 2.1 of the License, or (at your option) any later version.
08: 
09:    The GNU C Library is distributed in the hope that it will be useful,
10:    but WITHOUT ANY WARRANTY; without even the implied warranty of
11:    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12:    Lesser General Public License for more details.
13: 
14:    You should have received a copy of the GNU Lesser General Public
15:    License along with the GNU C Library; if not, write to the Free
16:    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17:    02111-1307 USA.  */
18: 
19: #ifndef _SYS_POLL_H
20: # error "Never use <bits/poll.h> directly; include <sys/poll.h> instead."
21: #endif
22: 
23: /* Event types that can be polled for.  These bits may be set in `events'
24:    to indicate the interesting event types; they will appear in `revents'
25:    to indicate the status of the file descriptor.  */
26: #define POLLIN          0x001           /* There is data to read.  */
27: #define POLLPRI         0x002           /* There is urgent data to read.  */
28: #define POLLOUT         0x004           /* Writing now will not block.  */
29: 
30: #if defined __USE_XOPEN || defined __USE_XOPEN2K8
31: /* These values are defined in XPG4.2.  */
32: # define POLLRDNORM     0x040           /* Normal data may be read.  */
33: # define POLLRDBAND     0x080           /* Priority data may be read.  */
34: # define POLLWRNORM     0x100           /* Writing now will not block.  */
35: # define POLLWRBAND     0x200           /* Priority data may be written.  */
36: #endif
37: 
38: #ifdef __USE_GNU
39: /* These are extensions for Linux.  */
40: # define POLLMSG        0x400
41: # define POLLREMOVE     0x1000
42: # define POLLRDHUP      0x2000
43: #endif
44: 
45: /* Event types always implicitly polled for.  These bits need not be set in
46:    `events', but they will appear in `revents' to indicate the status of
47:    the file descriptor.  */
48: #define POLLERR         0x008           /* Error condition.  */
49: #define POLLHUP         0x010           /* Hung up.  */
50: #define POLLNVAL        0x020           /* Invalid polling request.  */
51: 

---

---

---