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/* gmain.h - the GLib Main loop
* Copyright (C) 1998-2000 Red Hat, Inc.
*
* 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.
*/
#ifndef __G_MAIN_H__
#define __G_MAIN_H__
#include <gslist.h>
#include <gthread.h>
G_BEGIN_DECLS
typedef struct _GMainContext GMainContext; /* Opaque */
typedef struct _GMainLoop GMainLoop; /* Opaque */
typedef struct _GSource GSource;
typedef struct _GSourceCallbackFuncs GSourceCallbackFuncs;
typedef struct _GSourceFuncs GSourceFuncs;
typedef gboolean (*GSourceFunc) (gpointer data);
struct _GSource
{
/*< private >*/
gpointer callback_data;
GSourceCallbackFuncs *callback_funcs;
GSourceFuncs *source_funcs;
guint ref_count;
GMainContext *context;
gint priority;
guint flags;
guint id;
GSList *poll_fds;
GSource *prev;
GSource *next;
};
struct _GSourceCallbackFuncs
{
void (*ref) (gpointer cb_data);
void (*unref) (gpointer cb_data);
void (*get) (gpointer cb_data,
GSourceFunc *func,
gpointer *data);
};
struct _GSourceFuncs
{
gboolean (*prepare) (GSource *source,
gint *timeout);
gboolean (*check) (GSource *source);
gboolean (*dispatch) (GSource *source,
GSourceFunc callback,
gpointer user_data);
void (*destroy) (GSource *source); /* Can be NULL */
};
/* 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.
*
*
* 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;
};
/* 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
/* GMainContext: */
GMainContext *g_main_context_get (GThread *thread);
GMainContext *g_main_context_default (void);
gboolean g_main_context_iteration (GMainContext *context,
gboolean may_block);
gboolean g_main_context_pending (GMainContext *context);
/* For implementation of legacy interfaces
*/
GSource *g_main_context_find_source_by_id (GMainContext *context,
guint id);
GSource *g_main_context_find_source_by_user_data (GMainContext *context,
gpointer user_data);
GSource *g_main_context_find_source_by_funcs_user_data (GMainContext *context,
GSourceFuncs *funcs,
gpointer user_data);
/* Low level functions for implementing custom main loops.
*/
gboolean g_main_context_prepare (GMainContext *context,
gint *priority);
gint g_main_context_query (GMainContext *context,
gint max_priority,
gint *timeout,
GPollFD *fds,
gint n_fds);
gint g_main_context_check (GMainContext *context,
gint max_priority,
GPollFD *fds,
gint n_fds);
void g_main_context_dispatch (GMainContext *context);
void g_main_context_set_poll_func (GMainContext *context,
GPollFunc func);
GPollFunc g_main_context_get_poll_func (GMainContext *context);
/* Low level functions for use by source implementations
*/
void g_main_context_add_poll (GMainContext *context,
GPollFD *fd,
gint priority);
void g_main_context_remove_poll (GMainContext *context,
GPollFD *fd);
/* GMainLoop: */
GMainLoop *g_main_loop_new (GMainContext *context,
gboolean is_running);
void g_main_loop_run (GMainLoop *loop);
void g_main_loop_quit (GMainLoop *loop);
GMainLoop *g_main_loop_ref (GMainLoop *loop);
void g_main_loop_unref (GMainLoop *loop);
gboolean g_main_loop_is_running (GMainLoop *loop);
/* GSource: */
GSource *g_source_new (GSourceFuncs *source_funcs,
guint struct_size);
GSource *g_source_ref (GSource *source);
void g_source_unref (GSource *source);
guint g_source_attach (GSource *source,
GMainContext *context);
void g_source_destroy (GSource *source);
void g_source_set_priority (GSource *source,
gint priority);
gint g_source_get_priority (GSource *source);
void g_source_set_can_recurse (GSource *source,
gboolean can_recurse);
gboolean g_source_get_can_recurse (GSource *source);
guint g_source_get_id (GSource *source);
GMainContext *g_source_get_context (GSource *source);
void g_source_set_callback (GSource *source,
GSourceFunc func,
gpointer data,
GDestroyNotify notify);
/* Used to implement g_source_connect_closure and internally*/
void g_source_set_callback_indirect (GSource *source,
gpointer callback_data,
GSourceCallbackFuncs *callback_funcs);
void g_source_add_poll (GSource *source,
GPollFD *fd);
void g_source_remove_poll (GSource *source,
GPollFD *fd);
void g_source_get_current_time (GSource *source,
GTimeVal *timeval);
/* void g_source_connect_closure (GSource *source,
GClosure *closure);
*/
/* Specific source types
*/
GSource *g_idle_source_new (void);
GSource *g_timeout_source_new (guint interval);
/* Miscellaneous functions
*/
void g_get_current_time (GTimeVal *result);
/* ============== Compat main loop stuff ================== */
#ifndef G_DISABLE_DEPRECATED
/* Legacy names for GMainLoop functions
*/
#define g_main_new(is_running) g_main_loop_new (NULL, is_running);
#define g_main_run(loop) g_main_loop_run(loop)
#define g_main_quit(loop) g_main_loop_quit(loop)
#define g_main_destroy(loop) g_main_loop_unref(loop)
#define g_main_is_running(loop) g_main_loop_is_running(loop)
/* Functions to manipulate the default main loop
*/
#define g_main_iteration(may_block) g_main_context_iteration (NULL, may_block)
#define g_main_pending() g_main_context_pending (NULL)
#define g_main_set_poll_func(func) g_main_context_set_poll_func (NULL, func)
#endif /* G_DISABLE_DEPRECATED */
/* Source manipulation by ID */
gboolean g_source_remove (guint tag);
gboolean g_source_remove_by_user_data (gpointer user_data);
gboolean g_source_remove_by_funcs_user_data (GSourceFuncs *funcs,
gpointer user_data);
/* 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 notify);
gboolean g_idle_remove_by_data (gpointer data);
#ifdef G_OS_WIN32
/* This is used to add polling for Windows messages. GDK (GTK+) programs
* should *not* use this.
*/
void g_main_poll_win32_msg_add (gint priority,
GPollFD *fd,
guint hwnd);
#endif /* G_OS_WIN32 */
G_END_DECLS
#endif /* __G_MAIN_H__ */
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