mirror of
https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git
synced 2025-11-02 09:01:46 -05:00
58 lines
2.5 KiB
C
58 lines
2.5 KiB
C
/***
|
|
This file is part of PulseAudio.
|
|
|
|
Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
|
|
|
|
PulseAudio is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU Lesser General Public License as published
|
|
by the Free Software Foundation; either version 2 of the License,
|
|
or (at your option) any later version.
|
|
|
|
PulseAudio is distributed in the hope that it will be useful, but
|
|
WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public License
|
|
along with PulseAudio; if not, write to the Free Software
|
|
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
|
|
USA.
|
|
***/
|
|
|
|
/***
|
|
Based on work for the GNU C Library.
|
|
Copyright (C) 1994,96,97,98,99,2000,2001,2004 Free Software Foundation, Inc.
|
|
***/
|
|
|
|
/* Event types that can be polled for. These bits may be set in `events'
|
|
to indicate the interesting event types; they will appear in `revents'
|
|
to indicate the status of the file descriptor. */
|
|
#define POLLIN 0x001 /* There is data to read. */
|
|
#define POLLPRI 0x002 /* There is urgent data to read. */
|
|
#define POLLOUT 0x004 /* Writing now will not block. */
|
|
|
|
/* Event types always implicitly polled for. These bits need not be set in
|
|
`events', but they will appear in `revents' to indicate the status of
|
|
the file descriptor. */
|
|
#define POLLERR 0x008 /* Error condition. */
|
|
#define POLLHUP 0x010 /* Hung up. */
|
|
#define POLLNVAL 0x020 /* Invalid polling request. */
|
|
|
|
|
|
/* Type used for the number of file descriptors. */
|
|
typedef unsigned long int nfds_t;
|
|
|
|
/* Data structure describing a polling request. */
|
|
struct pollfd
|
|
{
|
|
int fd; /* File descriptor to poll. */
|
|
short int events; /* Types of events poller cares about. */
|
|
short int revents; /* Types of events that actually occurred. */
|
|
};
|
|
|
|
/* Poll the file descriptors described by the NFDS structures starting at
|
|
FDS. If TIMEOUT is nonzero and not -1, allow TIMEOUT milliseconds for
|
|
an event to occur; if TIMEOUT is -1, block until an event occurs.
|
|
Returns the number of file descriptors with events, zero if timed out,
|
|
or -1 for errors. */
|
|
extern int poll (struct pollfd *__fds, nfds_t __nfds, int __timeout);
|