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d7e357fb9c
Windows Vista (and later) actually have a working poll(), but we still cannot use it because it only works on sockets. So let's detect when we are targeting Windows Vista and undefine those constants, and define `pollfd` so that we can declare our own pollfd struct. We also need to make sure that we override those constants *after* `winsock2.h` has been `#include`d (otherwise we would not really override those constants). Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
67 lines
2.1 KiB
C
67 lines
2.1 KiB
C
/* Header for poll(2) emulation
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Contributed by Paolo Bonzini.
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Copyright 2001, 2002, 2003, 2007, 2009, 2010 Free Software Foundation, Inc.
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This file is part of gnulib.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, see <http://www.gnu.org/licenses/>. */
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#ifndef _GL_POLL_H
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#define _GL_POLL_H
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#if defined(_WIN32_WINNT) && _WIN32_WINNT >= 0x600
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/* Vista has its own, socket-only poll() */
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#undef POLLIN
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#undef POLLPRI
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#undef POLLOUT
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#undef POLLERR
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#undef POLLHUP
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#undef POLLNVAL
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#undef POLLRDNORM
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#undef POLLRDBAND
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#undef POLLWRNORM
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#undef POLLWRBAND
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#define pollfd compat_pollfd
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#endif
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/* fake a poll(2) environment */
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#define POLLIN 0x0001 /* any readable data available */
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#define POLLPRI 0x0002 /* OOB/Urgent readable data */
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#define POLLOUT 0x0004 /* file descriptor is writeable */
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#define POLLERR 0x0008 /* some poll error occurred */
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#define POLLHUP 0x0010 /* file descriptor was "hung up" */
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#define POLLNVAL 0x0020 /* requested events "invalid" */
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#define POLLRDNORM 0x0040
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#define POLLRDBAND 0x0080
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#define POLLWRNORM 0x0100
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#define POLLWRBAND 0x0200
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struct pollfd
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{
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int fd; /* which file descriptor to poll */
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short events; /* events we are interested in */
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short revents; /* events found on return */
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};
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typedef unsigned long nfds_t;
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extern int poll (struct pollfd *pfd, nfds_t nfd, int timeout);
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/* Define INFTIM only if doing so conforms to POSIX. */
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#if !defined (_POSIX_C_SOURCE) && !defined (_XOPEN_SOURCE)
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#define INFTIM (-1)
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#endif
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#endif /* _GL_POLL_H */
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