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64d87ac363
git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@1099 fefdeb5f-60dc-0310-8127-8f9354f1896f
61 lines
2.5 KiB
C
61 lines
2.5 KiB
C
/* $Id$ */
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/***
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Compatibility definitions for System V `poll' interface.
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Copyright (C) 1994,96,97,98,99,2000,2001,2004 Free Software Foundation, Inc.
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Copyright (C) 2005, Cendio AB.
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This file is part of PulseAudio.
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Based on work for the GNU C Library.
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***/
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/***
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This file is part of PulseAudio.
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PulseAudio is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published
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by the Free Software Foundation; either version 2 of the License,
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or (at your option) any later version.
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PulseAudio is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with PulseAudio; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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USA.
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***/
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/* Event types that can be polled for. These bits may be set in `events'
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to indicate the interesting event types; they will appear in `revents'
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to indicate the status of the file descriptor. */
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#define POLLIN 0x001 /* There is data to read. */
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#define POLLPRI 0x002 /* There is urgent data to read. */
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#define POLLOUT 0x004 /* Writing now will not block. */
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/* Event types always implicitly polled for. These bits need not be set in
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`events', but they will appear in `revents' to indicate the status of
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the file descriptor. */
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#define POLLERR 0x008 /* Error condition. */
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#define POLLHUP 0x010 /* Hung up. */
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#define POLLNVAL 0x020 /* Invalid polling request. */
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/* Type used for the number of file descriptors. */
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typedef unsigned long int nfds_t;
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/* Data structure describing a polling request. */
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struct pollfd
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{
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int fd; /* File descriptor to poll. */
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short int events; /* Types of events poller cares about. */
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short int revents; /* Types of events that actually occurred. */
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};
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/* Poll the file descriptors described by the NFDS structures starting at
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FDS. If TIMEOUT is nonzero and not -1, allow TIMEOUT milliseconds for
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an event to occur; if TIMEOUT is -1, block until an event occurs.
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Returns the number of file descriptors with events, zero if timed out,
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or -1 for errors. */
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extern int poll (struct pollfd *__fds, nfds_t __nfds, int __timeout);
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