From f44ba092651aa75055e109e04b4164ea92ae7fdc Mon Sep 17 00:00:00 2001 From: Lennart Poettering Date: Mon, 19 Jun 2006 21:53:48 +0000 Subject: big s/polyp/pulse/g git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@1033 fefdeb5f-60dc-0310-8127-8f9354f1896f --- src/pulsecore/poll.h | 57 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 57 insertions(+) create mode 100644 src/pulsecore/poll.h (limited to 'src/pulsecore/poll.h') diff --git a/src/pulsecore/poll.h b/src/pulsecore/poll.h new file mode 100644 index 00000000..bed772c7 --- /dev/null +++ b/src/pulsecore/poll.h @@ -0,0 +1,57 @@ +/* $Id$ */ + +/*** + Compatibility definitions for System V `poll' interface. + Copyright (C) 1994,96,97,98,99,2000,2001,2004 Free Software Foundation, Inc. + Copyright (C) 2005, Cendio AB. + This file is part of PulseAudio. + Based on work for the GNU C Library. + + PulseAudio is free software; you can redistribute it and/or modify it + under the terms of the GNU Library 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library 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. +***/ + +/* 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); -- cgit