1/*** 2 This file is part of PulseAudio. 3 4 Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB 5 6 PulseAudio is free software; you can redistribute it and/or modify 7 it under the terms of the GNU Lesser General Public License as published 8 by the Free Software Foundation; either version 2.1 of the License, 9 or (at your option) any later version. 10 11 PulseAudio is distributed in the hope that it will be useful, but 12 WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 General Public License for more details. 15 16 You should have received a copy of the GNU Lesser General Public License 17 along with PulseAudio; if not, see <http://www.gnu.org/licenses/>. 18***/ 19 20/*** 21 Based on work for the GNU C Library. 22 Copyright (C) 1994,96,97,98,99,2000,2001,2004 Free Software Foundation, Inc. 23***/ 24 25#if defined(HAVE_POLL_H) 26#include <poll.h> 27#elif OS_IS_WIN32 && HAVE_WINSOCK2_H && (_WIN32_WINNT >= 0x0600) 28#include <winsock2.h> 29#else 30 31/* Event types that can be polled for. These bits may be set in `events' 32 to indicate the interesting event types; they will appear in `revents' 33 to indicate the status of the file descriptor. */ 34#define POLLIN 0x001 /* There is data to read. */ 35#define POLLPRI 0x002 /* There is urgent data to read. */ 36#define POLLOUT 0x004 /* Writing now will not block. */ 37 38/* Event types always implicitly polled for. These bits need not be set in 39 `events', but they will appear in `revents' to indicate the status of 40 the file descriptor. */ 41#define POLLERR 0x008 /* Error condition. */ 42#define POLLHUP 0x010 /* Hung up. */ 43#define POLLNVAL 0x020 /* Invalid polling request. */ 44 45/* Data structure describing a polling request. */ 46struct pollfd { 47 int fd; /* File descriptor to poll. */ 48 short int events; /* Types of events poller cares about. */ 49 short int revents; /* Types of events that actually occurred. */ 50}; 51 52/* Poll the file descriptors described by the NFDS structures starting at 53 FDS. If TIMEOUT is nonzero and not -1, allow TIMEOUT milliseconds for 54 an event to occur; if TIMEOUT is -1, block until an event occurs. 55 Returns the number of file descriptors with events, zero if timed out, 56 or -1 for errors. */ 57 58#endif /* HAVE_POLL_H */ 59 60#if defined(HAVE_POLL_H) && !defined(OS_IS_DARWIN) 61#define pa_poll(fds,nfds,timeout) poll((fds),(nfds),(timeout)) 62#else 63int pa_poll(struct pollfd *fds, unsigned long nfds, int timeout); 64#endif 65