/* gpoll.h - poll(2) support

  * Copyright (C) 2008 Red Hat, Inc.

  * Portions copyright (c) 2009 Nokia Corporation.  All rights reserved.

  * This library 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.

  *

  * This library 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 this library; if not, write to the

  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,

  * Boston, MA 02111-1307, USA.

  */

 #if !defined (__GLIB_H_INSIDE__) && !defined (__G_MAIN_H__) && !defined (GLIB_COMPILATION)

 #error "Only <glib.h> can be included directly."

 #endif

 #ifndef __G_POLL_H__

 #define __G_POLL_H__

 #include <glib/gtypes.h>

 G_BEGIN_DECLS

 /* Any definitions using GPollFD or GPollFunc are primarily

  * for Unix and not guaranteed to be the compatible on all

  * operating systems on which GLib runs. Right now, the

  * GLib does use these functions on Win32 as well, but interprets

  * them in a fairly different way than on Unix. If you use

  * these definitions, you are should be prepared to recode

  * for different operating systems.

  *

  * Note that on systems with a working poll(2), that function is used

  * in place of g_poll(). Thus g_poll() must have the same signature as

  * poll(), meaning GPollFD must have the same layout as struct pollfd.

  *

  *

  * On Win32, the fd in a GPollFD should be Win32 HANDLE (*not* a file

  * descriptor as provided by the C runtime) that can be used by

  * MsgWaitForMultipleObjects. This does *not* include file handles

  * from CreateFile, SOCKETs, nor pipe handles. (But you can use

  * WSAEventSelect to signal events when a SOCKET is readable).

  *

  * On Win32, fd can also be the special value G_WIN32_MSG_HANDLE to

  * indicate polling for messages.

  *

  * But note that G_WIN32_MSG_HANDLE GPollFDs should not be used by GDK

  * (GTK) programs, as GDK itself wants to read messages and convert them

  * to GDK events.

  *

  * So, unless you really know what you are doing, it's best not to try

  * to use the main loop polling stuff for your own needs on

  * Windows.

  */

 typedef struct _GPollFD GPollFD;

 typedef gint	(*GPollFunc)	(GPollFD *ufds,

 				 guint	  nfsd,

 				 gint     timeout_);

 struct _GPollFD

 {

 #if defined (G_OS_WIN32) && GLIB_SIZEOF_VOID_P == 8

   gint64	fd;

 #else

   gint		fd;

 #endif

   gushort 	events;

   gushort 	revents;

 };

 #ifdef G_OS_WIN32

 #if GLIB_SIZEOF_VOID_P == 8

 #define G_POLLFD_FORMAT "%#I64x"

 #else

 #define G_POLLFD_FORMAT "%#x"

 #endif

 #else

 #define G_POLLFD_FORMAT "%d"

 #endif

 IMPORT_C gint g_poll (GPollFD *fds,

 	     guint    nfds,

 	     gint     timeout);

 G_END_DECLS

 #endif /* __G_POLL_H__ */