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/* Copyright 2002,2003 Nick Mathewson, Roger Dingledine */
/* See LICENSE for licensing information */
/* $Id$ */
/* On systems where 'poll' doesn't exist, fake it with 'select'. */
#include "orconfig.h"
#include "fakepoll.h"
#ifdef USE_FAKE_POLL
#include <sys/types.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#if _MSC_VER > 1300
#include <winsock2.h>
#include <ws2tcpip.h>
#elif defined(_MSC_VER)
#include <winsock.h>
#endif
/* by default, windows handles only 64 fd's */
#if defined(MS_WINDOWS) && !defined(FD_SETSIZE)
#define FD_SETSIZE MAXCONNECTIONS
#endif
#include "util.h"
int
poll(struct pollfd *ufds, unsigned int nfds, int timeout)
{
int idx, maxfd, fd;
int r;
#ifdef MS_WINDOWS
int any_fds_set = 0;
#endif
fd_set readfds, writefds, exceptfds;
#ifdef USING_FAKE_TIMEVAL
#undef timeval
#undef tv_sec
#undef tv_usec
#endif
struct timeval _timeout;
_timeout.tv_sec = timeout/1000;
_timeout.tv_usec = (timeout%1000)*1000;
FD_ZERO(&readfds);
FD_ZERO(&writefds);
FD_ZERO(&exceptfds);
maxfd = -1;
for (idx = 0; idx < nfds; ++idx) {
ufds[idx].revents = 0;
fd = ufds[idx].fd;
if (fd > maxfd) {
maxfd = fd;
#ifdef MS_WINDOWS
any_fds_set = 1;
#endif
}
if (ufds[idx].events & POLLIN)
FD_SET(fd, &readfds);
if (ufds[idx].events & POLLOUT)
FD_SET(fd, &writefds);
FD_SET(fd, &exceptfds);
}
#ifdef MS_WINDOWS
if (!any_fds_set) {
Sleep(timeout);
return 0;
}
#endif
r = select(maxfd+1, &readfds, &writefds, &exceptfds,
timeout == -1 ? NULL : &_timeout);
if (r <= 0)
return r;
r = 0;
for (idx = 0; idx < nfds; ++idx) {
fd = ufds[idx].fd;
if (FD_ISSET(fd, &readfds))
ufds[idx].revents |= POLLIN;
if (FD_ISSET(fd, &writefds))
ufds[idx].revents |= POLLOUT;
if (FD_ISSET(fd, &exceptfds))
ufds[idx].revents |= POLLERR;
if (ufds[idx].revents)
++r;
}
return r;
}
#endif
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