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/* Copyright 2002,2003 Nick Mathewson, Roger Dingledine. */
/* See LICENSE for licensing information */
/* $Id$ */
#ifndef __FAKEPOLL_H
#define __FAKEPOLL_H
#define FAKEPOLL_H_ID "$Id$"
/**
* \file fakepoll.h
* \brief Headers for fakepoll.c
*/
#include "orconfig.h"
#define POLL_NO_WARN
#if defined(HAVE_POLL_H)
#include <poll.h>
#elif defined(HAVE_SYS_POLL_H)
#include <sys/poll.h>
#endif
/* If _POLL_EMUL_H_ is defined, then poll is just a just a thin wrapper around
* select. On Mac OS 10.3, this wrapper is kinda flaky, and we should
* use our own.
*/
#if !(defined(HAVE_POLL_H)||defined(HAVE_SYS_POLL_H))&&!defined(_POLL_EMUL_H_)
#define USE_FAKE_POLL
#endif
#if defined USE_FAKE_POLL && !defined(_POLL_EMUL_H_)
struct pollfd {
int fd;
short events;
short revents;
};
#define POLLIN 0x0001
#define POLLPRI 0x0002
#define POLLOUT 0x0004
#define POLLERR 0x0008
#define POLLHUP 0x0010
#define POLLNVAL 0x0020
#endif
#ifdef MS_WINDOWS
#define MAXCONNECTIONS 10000 /* XXXX copied from or.h */
/* This trick makes winsock resize fd_set, which defaults to the insanely low
* 64. */
#define FD_SETSIZE MAXCONNECTIONS
/* XXXX But Windows FD_SET and FD_CLR are tremendously ugly, and linear in
* the total number of sockets set! Perhaps we should eventually use
* WSAEventSelect and WSAWaitForMultipleEvents instead of select? */
#endif
#if defined(MS_WINDOWS) || ! defined(USE_FAKE_POLL)
/* If we're using poll, we can poll as many sockets as we want.
* If we're on Windows, having too many sockets is harmless, since
* select stupidly uses an array of sockets rather than a bitfield. */
#define SOCKET_IS_POLLABLE(fd) ((fd) >= 0)
#else
/* If we're using a real Posix select, then in order to be pollable, a socket
* must
* a) be valid (>= 0)
* b) be < FD_SETSIZE.
*/
#define SOCKET_IS_POLLABLE(fd) ((fd) >= 0 && (fd) < FD_SETSIZE)
#endif
int tor_poll(struct pollfd *ufds, unsigned int nfds, int timeout);
#endif
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