1 /* gmain.h - the GLib Main loop
2 * Copyright (C) 1998-2000 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.
23 #include <glib/gslist.h>
24 #include <glib/gthread.h>
28 typedef struct _GMainContext GMainContext
; /* Opaque */
29 typedef struct _GMainLoop GMainLoop
; /* Opaque */
30 typedef struct _GSource GSource
;
31 typedef struct _GSourceCallbackFuncs GSourceCallbackFuncs
;
32 typedef struct _GSourceFuncs GSourceFuncs
;
34 typedef gboolean (*GSourceFunc
) (gpointer data
);
35 typedef void (*GChildWatchFunc
) (GPid pid
,
41 gpointer callback_data
;
42 GSourceCallbackFuncs
*callback_funcs
;
44 GSourceFuncs
*source_funcs
;
47 GMainContext
*context
;
62 struct _GSourceCallbackFuncs
64 void (*ref
) (gpointer cb_data
);
65 void (*unref
) (gpointer cb_data
);
66 void (*get
) (gpointer cb_data
,
72 typedef void (*GSourceDummyMarshal
) (void);
76 gboolean (*prepare
) (GSource
*source
,
78 gboolean (*check
) (GSource
*source
);
79 gboolean (*dispatch
) (GSource
*source
,
82 void (*finalize
) (GSource
*source
); /* Can be NULL */
84 /* For use by g_source_set_closure */
85 GSourceFunc closure_callback
;
86 GSourceDummyMarshal closure_marshal
; /* Really is of type GClosureMarshal */
89 /* Any definitions using GPollFD or GPollFunc are primarily
90 * for Unix and not guaranteed to be the compatible on all
91 * operating systems on which GLib runs. Right now, the
92 * GLib does use these functions on Win32 as well, but interprets
93 * them in a fairly different way than on Unix. If you use
94 * these definitions, you are should be prepared to recode
95 * for different operating systems.
98 * On Win32, the fd in a GPollFD should be Win32 HANDLE (*not* a file
99 * descriptor as provided by the C runtime) that can be used by
100 * MsgWaitForMultipleObjects. This does *not* include file handles
101 * from CreateFile, SOCKETs, nor pipe handles. (But you can use
102 * WSAEventSelect to signal events when a SOCKET is readable).
104 * On Win32, fd can also be the special value G_WIN32_MSG_HANDLE to
105 * indicate polling for messages.
107 * But note that G_WIN32_MSG_HANDLE GPollFDs should not be used by GDK
108 * (GTK) programs, as GDK itself wants to read messages and convert them
111 * So, unless you really know what you are doing, it's best not to try
112 * to use the main loop polling stuff for your own needs on
113 * Win32. It's really only written for the GIMP's needs so
116 typedef struct _GPollFD GPollFD
;
117 typedef gint (*GPollFunc
) (GPollFD
*ufds
,
128 /* Standard priorities */
130 #define G_PRIORITY_HIGH -100
131 #define G_PRIORITY_DEFAULT 0
132 #define G_PRIORITY_HIGH_IDLE 100
133 #define G_PRIORITY_DEFAULT_IDLE 200
134 #define G_PRIORITY_LOW 300
138 GMainContext
*g_main_context_new (void);
139 GMainContext
*g_main_context_ref (GMainContext
*context
);
140 void g_main_context_unref (GMainContext
*context
);
141 GMainContext
*g_main_context_default (void);
143 gboolean
g_main_context_iteration (GMainContext
*context
,
145 gboolean
g_main_context_pending (GMainContext
*context
);
147 /* For implementation of legacy interfaces
149 GSource
*g_main_context_find_source_by_id (GMainContext
*context
,
151 GSource
*g_main_context_find_source_by_user_data (GMainContext
*context
,
153 GSource
*g_main_context_find_source_by_funcs_user_data (GMainContext
*context
,
157 /* Low level functions for implementing custom main loops.
159 void g_main_context_wakeup (GMainContext
*context
);
160 gboolean
g_main_context_acquire (GMainContext
*context
);
161 void g_main_context_release (GMainContext
*context
);
162 gboolean
g_main_context_wait (GMainContext
*context
,
166 gboolean
g_main_context_prepare (GMainContext
*context
,
168 gint
g_main_context_query (GMainContext
*context
,
173 gint
g_main_context_check (GMainContext
*context
,
177 void g_main_context_dispatch (GMainContext
*context
);
179 void g_main_context_set_poll_func (GMainContext
*context
,
181 GPollFunc
g_main_context_get_poll_func (GMainContext
*context
);
183 /* Low level functions for use by source implementations
185 void g_main_context_add_poll (GMainContext
*context
,
188 void g_main_context_remove_poll (GMainContext
*context
,
191 int g_main_depth (void);
195 GMainLoop
*g_main_loop_new (GMainContext
*context
,
196 gboolean is_running
);
197 void g_main_loop_run (GMainLoop
*loop
);
198 void g_main_loop_quit (GMainLoop
*loop
);
199 GMainLoop
*g_main_loop_ref (GMainLoop
*loop
);
200 void g_main_loop_unref (GMainLoop
*loop
);
201 gboolean
g_main_loop_is_running (GMainLoop
*loop
);
202 GMainContext
*g_main_loop_get_context (GMainLoop
*loop
);
206 GSource
*g_source_new (GSourceFuncs
*source_funcs
,
208 GSource
*g_source_ref (GSource
*source
);
209 void g_source_unref (GSource
*source
);
211 guint
g_source_attach (GSource
*source
,
212 GMainContext
*context
);
213 void g_source_destroy (GSource
*source
);
215 void g_source_set_priority (GSource
*source
,
217 gint
g_source_get_priority (GSource
*source
);
218 void g_source_set_can_recurse (GSource
*source
,
219 gboolean can_recurse
);
220 gboolean
g_source_get_can_recurse (GSource
*source
);
221 guint
g_source_get_id (GSource
*source
);
223 GMainContext
*g_source_get_context (GSource
*source
);
225 void g_source_set_callback (GSource
*source
,
228 GDestroyNotify notify
);
231 /* Used to implement g_source_connect_closure and internally*/
232 void g_source_set_callback_indirect (GSource
*source
,
233 gpointer callback_data
,
234 GSourceCallbackFuncs
*callback_funcs
);
236 void g_source_add_poll (GSource
*source
,
238 void g_source_remove_poll (GSource
*source
,
241 void g_source_get_current_time (GSource
*source
,
244 /* void g_source_connect_closure (GSource *source,
248 /* Specific source types
250 GSource
*g_idle_source_new (void);
251 GSource
*g_child_watch_source_new (GPid pid
);
252 GSource
*g_timeout_source_new (guint interval
);
254 /* Miscellaneous functions
256 void g_get_current_time (GTimeVal
*result
);
258 /* ============== Compat main loop stuff ================== */
260 #ifndef G_DISABLE_DEPRECATED
262 /* Legacy names for GMainLoop functions
264 #define g_main_new(is_running) g_main_loop_new (NULL, is_running);
265 #define g_main_run(loop) g_main_loop_run(loop)
266 #define g_main_quit(loop) g_main_loop_quit(loop)
267 #define g_main_destroy(loop) g_main_loop_unref(loop)
268 #define g_main_is_running(loop) g_main_loop_is_running(loop)
270 /* Functions to manipulate the default main loop
273 #define g_main_iteration(may_block) g_main_context_iteration (NULL, may_block)
274 #define g_main_pending() g_main_context_pending (NULL)
276 #define g_main_set_poll_func(func) g_main_context_set_poll_func (NULL, func)
278 #endif /* G_DISABLE_DEPRECATED */
280 /* Source manipulation by ID */
281 gboolean
g_source_remove (guint tag
);
282 gboolean
g_source_remove_by_user_data (gpointer user_data
);
283 gboolean
g_source_remove_by_funcs_user_data (GSourceFuncs
*funcs
,
286 /* Idles, child watchers and timeouts */
287 guint
g_timeout_add_full (gint priority
,
289 GSourceFunc function
,
291 GDestroyNotify notify
);
292 guint
g_timeout_add (guint interval
,
293 GSourceFunc function
,
295 guint
g_child_watch_add_full (gint priority
,
297 GChildWatchFunc function
,
299 GDestroyNotify notify
);
300 guint
g_child_watch_add (GPid pid
,
301 GChildWatchFunc function
,
303 guint
g_idle_add (GSourceFunc function
,
305 guint
g_idle_add_full (gint priority
,
306 GSourceFunc function
,
308 GDestroyNotify notify
);
309 gboolean
g_idle_remove_by_data (gpointer data
);
311 /* Hook for GClosure / GSource integration. Don't touch */
312 GLIB_VAR GSourceFuncs g_timeout_funcs
;
313 GLIB_VAR GSourceFuncs g_child_watch_funcs
;
314 GLIB_VAR GSourceFuncs g_idle_funcs
;
318 #endif /* __G_MAIN_H__ */