/**
 * Processes every client.
 *
 * Returns the number of clients processed.
 *
 * Returns -1 if error.
 */
int runloop_process_clients(RunloopRef runloop, int timeout_seconds)
{
	ListIteratorRef iter = ONew(listiterator,(runloop->clients));
	int fd;
	fd_set set;
	struct timeval timeout;
	int result;

	timeout.tv_sec = timeout_seconds;
	timeout.tv_usec = 0;

	FD_ZERO(&set);

	while( listiterator_next(iter, (void*)&fd) )
	{
		FD_SET(fd, &set);
	}

	ORelease(iter);

	result = select(FD_SETSIZE, &set, NULL, NULL, &timeout);

	if( result > 0 )
	{
		iter = ONew(listiterator,(runloop->clients));

		while( listiterator_next(iter, (void*)&fd) )
		{
			// file descriptor ready for reading
			if( FD_ISSET(fd, &set) )
			{
				if( ! fd )
				{
					runloop_process_stdin(runloop, fd);
				}
				else
				{
					runloop_process_socket(runloop, fd);
				}
			}
		}

		ORelease(iter);
	}

	return result;
}