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/* GLIB - Library of useful routines for C programming
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser 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.
*/
/*
* Modified by the GLib Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GLib Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GLib at ftp://ftp.gtk.org/pub/gtk/.
*/
#ifndef __G_MAIN_H__
#define __G_MAIN_H__
#include <gtypes.h>
G_BEGIN_DECLS
/* Main loop
*/
typedef struct _GTimeVal GTimeVal;
typedef struct _GSourceFuncs GSourceFuncs;
typedef struct _GMainLoop GMainLoop; /* Opaque */
struct _GTimeVal
{
glong tv_sec;
glong tv_usec;
};
struct _GSourceFuncs
{
gboolean (*prepare) (gpointer source_data,
GTimeVal *current_time,
gint *timeout,
gpointer user_data);
gboolean (*check) (gpointer source_data,
GTimeVal *current_time,
gpointer user_data);
gboolean (*dispatch) (gpointer source_data,
GTimeVal *dispatch_time,
gpointer user_data);
GDestroyNotify destroy;
};
/* Standard priorities */
#define G_PRIORITY_HIGH -100
#define G_PRIORITY_DEFAULT 0
#define G_PRIORITY_HIGH_IDLE 100
#define G_PRIORITY_DEFAULT_IDLE 200
#define G_PRIORITY_LOW 300
typedef gboolean (*GSourceFunc) (gpointer data);
/* Hooks for adding to the main loop */
guint g_source_add (gint priority,
gboolean can_recurse,
GSourceFuncs *funcs,
gpointer source_data,
gpointer user_data,
GDestroyNotify notify);
gboolean g_source_remove (guint tag);
gboolean g_source_remove_by_user_data (gpointer user_data);
gboolean g_source_remove_by_source_data (gpointer source_data);
gboolean g_source_remove_by_funcs_user_data (GSourceFuncs *funcs,
gpointer user_data);
void g_get_current_time (GTimeVal *result);
/* Running the main loop */
GMainLoop* g_main_new (gboolean is_running);
void g_main_run (GMainLoop *loop);
void g_main_quit (GMainLoop *loop);
void g_main_destroy (GMainLoop *loop);
gboolean g_main_is_running (GMainLoop *loop);
/* Run a single iteration of the mainloop. If block is FALSE,
* will never block
*/
gboolean g_main_iteration (gboolean may_block);
/* See if any events are pending */
gboolean g_main_pending (void);
/* Idles and timeouts */
guint g_timeout_add_full (gint priority,
guint interval,
GSourceFunc function,
gpointer data,
GDestroyNotify notify);
guint g_timeout_add (guint interval,
GSourceFunc function,
gpointer data);
guint g_idle_add (GSourceFunc function,
gpointer data);
guint g_idle_add_full (gint priority,
GSourceFunc function,
gpointer data,
GDestroyNotify destroy);
gboolean g_idle_remove_by_data (gpointer data);
/* GPollFD
*
* System-specific IO and main loop calls
*
* 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. These message queue GPollFDs should
* be added with the g_main_poll_win32_msg_add function.
*
* 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
* Win32. It's really only written for the GIMP's needs so
* far.
*/
typedef struct _GPollFD GPollFD;
typedef gint (*GPollFunc) (GPollFD *ufds,
guint nfsd,
gint timeout);
struct _GPollFD
{
gint fd;
gushort events;
gushort revents;
};
void g_main_add_poll (GPollFD *fd,
gint priority);
void g_main_remove_poll (GPollFD *fd);
void g_main_set_poll_func (GPollFunc func);
#ifdef G_OS_WIN32
/* Useful on other platforms, too? */
GPollFunc g_main_win32_get_poll_func (void);
#endif
G_END_DECLS
#endif /* __G_MAIN_H__ */
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