Sixth batch
[git/git.git] / compat / poll / poll.h
1 /* Header for poll(2) emulation
2 Contributed by Paolo Bonzini.
3
4 Copyright 2001, 2002, 2003, 2007, 2009, 2010 Free Software Foundation, Inc.
5
6 This file is part of gnulib.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
11 any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License along
19 with this program; if not, see <http://www.gnu.org/licenses/>. */
20
21 #ifndef _GL_POLL_H
22 #define _GL_POLL_H
23
24 #if defined(_WIN32_WINNT) && _WIN32_WINNT >= 0x600
25 /* Vista has its own, socket-only poll() */
26 #undef POLLIN
27 #undef POLLPRI
28 #undef POLLOUT
29 #undef POLLERR
30 #undef POLLHUP
31 #undef POLLNVAL
32 #undef POLLRDNORM
33 #undef POLLRDBAND
34 #undef POLLWRNORM
35 #undef POLLWRBAND
36 #define pollfd compat_pollfd
37 #endif
38
39 /* fake a poll(2) environment */
40 #define POLLIN 0x0001 /* any readable data available */
41 #define POLLPRI 0x0002 /* OOB/Urgent readable data */
42 #define POLLOUT 0x0004 /* file descriptor is writeable */
43 #define POLLERR 0x0008 /* some poll error occurred */
44 #define POLLHUP 0x0010 /* file descriptor was "hung up" */
45 #define POLLNVAL 0x0020 /* requested events "invalid" */
46 #define POLLRDNORM 0x0040
47 #define POLLRDBAND 0x0080
48 #define POLLWRNORM 0x0100
49 #define POLLWRBAND 0x0200
50
51 struct pollfd
52 {
53 int fd; /* which file descriptor to poll */
54 short events; /* events we are interested in */
55 short revents; /* events found on return */
56 };
57
58 typedef unsigned long nfds_t;
59
60 extern int poll (struct pollfd *pfd, nfds_t nfd, int timeout);
61
62 /* Define INFTIM only if doing so conforms to POSIX. */
63 #if !defined (_POSIX_C_SOURCE) && !defined (_XOPEN_SOURCE)
64 #define INFTIM (-1)
65 #endif
66
67 #endif /* _GL_POLL_H */