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);
39 gpointer callback_data;
40 GSourceCallbackFuncs *callback_funcs;
42 GSourceFuncs *source_funcs;
45 GMainContext *context;
57 struct _GSourceCallbackFuncs
59 void (*ref) (gpointer cb_data);
60 void (*unref) (gpointer cb_data);
61 void (*get) (gpointer cb_data,
67 typedef void (*GSourceDummyMarshal) (void);
71 gboolean (*prepare) (GSource *source,
73 gboolean (*check) (GSource *source);
74 gboolean (*dispatch) (GSource *source,
77 void (*finalize) (GSource *source); /* Can be NULL */
79 /* For use by g_source_set_closure */
80 GSourceFunc closure_callback;
81 GSourceDummyMarshal closure_marshal; /* Really is of type GClosureMarshal */
84 /* Any definitions using GPollFD or GPollFunc are primarily
85 * for Unix and not guaranteed to be the compatible on all
86 * operating systems on which GLib runs. Right now, the
87 * GLib does use these functions on Win32 as well, but interprets
88 * them in a fairly different way than on Unix. If you use
89 * these definitions, you are should be prepared to recode
90 * for different operating systems.
93 * On Win32, the fd in a GPollFD should be Win32 HANDLE (*not* a file
94 * descriptor as provided by the C runtime) that can be used by
95 * MsgWaitForMultipleObjects. This does *not* include file handles
96 * from CreateFile, SOCKETs, nor pipe handles. (But you can use
97 * WSAEventSelect to signal events when a SOCKET is readable).
99 * On Win32, fd can also be the special value G_WIN32_MSG_HANDLE to
100 * indicate polling for messages. These message queue GPollFDs should
101 * be added with the g_main_poll_win32_msg_add function.
103 * But note that G_WIN32_MSG_HANDLE GPollFDs should not be used by GDK
104 * (GTK) programs, as GDK itself wants to read messages and convert them
107 * So, unless you really know what you are doing, it's best not to try
108 * to use the main loop polling stuff for your own needs on
109 * Win32. It's really only written for the GIMP's needs so
112 typedef struct _GPollFD GPollFD;
113 typedef gint (*GPollFunc) (GPollFD *ufds,
124 /* Standard priorities */
126 #define G_PRIORITY_HIGH -100
127 #define G_PRIORITY_DEFAULT 0
128 #define G_PRIORITY_HIGH_IDLE 100
129 #define G_PRIORITY_DEFAULT_IDLE 200
130 #define G_PRIORITY_LOW 300
134 GMainContext *g_main_context_new (void);
135 void g_main_context_ref (GMainContext *context);
136 void g_main_context_unref (GMainContext *context);
137 GMainContext *g_main_context_default (void);
139 gboolean g_main_context_iteration (GMainContext *context,
141 gboolean g_main_context_pending (GMainContext *context);
143 /* For implementation of legacy interfaces
145 GSource *g_main_context_find_source_by_id (GMainContext *context,
147 GSource *g_main_context_find_source_by_user_data (GMainContext *context,
149 GSource *g_main_context_find_source_by_funcs_user_data (GMainContext *context,
153 /* Low level functions for implementing custom main loops.
155 void g_main_context_wakeup (GMainContext *context);
156 gboolean g_main_context_acquire (GMainContext *context);
157 void g_main_context_release (GMainContext *context);
158 gboolean g_main_context_wait (GMainContext *context,
162 gboolean g_main_context_prepare (GMainContext *context,
164 gint g_main_context_query (GMainContext *context,
169 gint g_main_context_check (GMainContext *context,
173 void g_main_context_dispatch (GMainContext *context);
175 void g_main_context_set_poll_func (GMainContext *context,
177 GPollFunc g_main_context_get_poll_func (GMainContext *context);
179 /* Low level functions for use by source implementations
181 void g_main_context_add_poll (GMainContext *context,
184 void g_main_context_remove_poll (GMainContext *context,
189 GMainLoop *g_main_loop_new (GMainContext *context,
190 gboolean is_running);
191 void g_main_loop_run (GMainLoop *loop);
192 void g_main_loop_quit (GMainLoop *loop);
193 GMainLoop *g_main_loop_ref (GMainLoop *loop);
194 void g_main_loop_unref (GMainLoop *loop);
195 gboolean g_main_loop_is_running (GMainLoop *loop);
196 GMainContext *g_main_loop_get_context (GMainLoop *loop);
200 GSource *g_source_new (GSourceFuncs *source_funcs,
202 GSource *g_source_ref (GSource *source);
203 void g_source_unref (GSource *source);
205 guint g_source_attach (GSource *source,
206 GMainContext *context);
207 void g_source_destroy (GSource *source);
209 void g_source_set_priority (GSource *source,
211 gint g_source_get_priority (GSource *source);
212 void g_source_set_can_recurse (GSource *source,
213 gboolean can_recurse);
214 gboolean g_source_get_can_recurse (GSource *source);
215 guint g_source_get_id (GSource *source);
217 GMainContext *g_source_get_context (GSource *source);
219 void g_source_set_callback (GSource *source,
222 GDestroyNotify notify);
225 /* Used to implement g_source_connect_closure and internally*/
226 void g_source_set_callback_indirect (GSource *source,
227 gpointer callback_data,
228 GSourceCallbackFuncs *callback_funcs);
230 void g_source_add_poll (GSource *source,
232 void g_source_remove_poll (GSource *source,
235 void g_source_get_current_time (GSource *source,
238 /* void g_source_connect_closure (GSource *source,
242 /* Specific source types
244 GSource *g_idle_source_new (void);
245 GSource *g_timeout_source_new (guint interval);
247 /* Miscellaneous functions
249 void g_get_current_time (GTimeVal *result);
251 /* ============== Compat main loop stuff ================== */
253 #ifndef G_DISABLE_DEPRECATED
255 /* Legacy names for GMainLoop functions
257 #define g_main_new(is_running) g_main_loop_new (NULL, is_running);
258 #define g_main_run(loop) g_main_loop_run(loop)
259 #define g_main_quit(loop) g_main_loop_quit(loop)
260 #define g_main_destroy(loop) g_main_loop_unref(loop)
261 #define g_main_is_running(loop) g_main_loop_is_running(loop)
263 /* Functions to manipulate the default main loop
266 #define g_main_iteration(may_block) g_main_context_iteration (NULL, may_block)
267 #define g_main_pending() g_main_context_pending (NULL)
269 #define g_main_set_poll_func(func) g_main_context_set_poll_func (NULL, func)
271 #endif /* G_DISABLE_DEPRECATED */
273 /* Source manipulation by ID */
274 gboolean g_source_remove (guint tag);
275 gboolean g_source_remove_by_user_data (gpointer user_data);
276 gboolean g_source_remove_by_funcs_user_data (GSourceFuncs *funcs,
279 /* Idles and timeouts */
280 guint g_timeout_add_full (gint priority,
282 GSourceFunc function,
284 GDestroyNotify notify);
285 guint g_timeout_add (guint interval,
286 GSourceFunc function,
288 guint g_idle_add (GSourceFunc function,
290 guint g_idle_add_full (gint priority,
291 GSourceFunc function,
293 GDestroyNotify notify);
294 gboolean g_idle_remove_by_data (gpointer data);
296 /* Hook for GClosure / GSource integration. Don't touch */
297 GLIB_VAR GSourceFuncs g_timeout_funcs;
298 GLIB_VAR GSourceFuncs g_idle_funcs;
302 /* This is used to add polling for Windows messages. GDK (GTK+) programs
303 * should *not* use this.
305 void g_main_poll_win32_msg_add (gint priority,
308 #endif /* G_OS_WIN32 */
312 #endif /* __G_MAIN_H__ */