1 /* gpoll.h - poll(2) support
2 * Copyright (C) 2008 Red Hat, Inc.
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
14 * You should have received a copy of the GNU Library General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
20 #if defined(G_DISABLE_SINGLE_INCLUDES) && !defined (__GLIB_H_INSIDE__) && !defined (GLIB_COMPILATION)
21 #error "Only <glib.h> can be included directly."
29 /* Any definitions using GPollFD or GPollFunc are primarily
30 * for Unix and not guaranteed to be the compatible on all
31 * operating systems on which GLib runs. Right now, the
32 * GLib does use these functions on Win32 as well, but interprets
33 * them in a fairly different way than on Unix. If you use
34 * these definitions, you are should be prepared to recode
35 * for different operating systems.
37 * Note that on systems with a working poll(2), that function is used
38 * in place of g_poll(). Thus g_poll() must have the same signature as
39 * poll(), meaning GPollFD must have the same layout as struct pollfd.
42 * On Win32, the fd in a GPollFD should be Win32 HANDLE (*not* a file
43 * descriptor as provided by the C runtime) that can be used by
44 * MsgWaitForMultipleObjects. This does *not* include file handles
45 * from CreateFile, SOCKETs, nor pipe handles. (But you can use
46 * WSAEventSelect to signal events when a SOCKET is readable).
48 * On Win32, fd can also be the special value G_WIN32_MSG_HANDLE to
49 * indicate polling for messages.
51 * But note that G_WIN32_MSG_HANDLE GPollFDs should not be used by GDK
52 * (GTK) programs, as GDK itself wants to read messages and convert them
55 * So, unless you really know what you are doing, it's best not to try
56 * to use the main loop polling stuff for your own needs on
59 typedef struct _GPollFD GPollFD;
60 typedef gint (*GPollFunc) (GPollFD *ufds,
66 #if defined (G_OS_WIN32) && GLIB_SIZEOF_VOID_P == 8
76 #if GLIB_SIZEOF_VOID_P == 8
77 #define G_POLLFD_FORMAT "%#I64x"
79 #define G_POLLFD_FORMAT "%#x"
82 #define G_POLLFD_FORMAT "%d"
85 gint g_poll (GPollFD *fds,
91 #endif /* __G_POLL_H__ */