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;
60 struct _GSourceCallbackFuncs
62 void (*ref) (gpointer cb_data);
63 void (*unref) (gpointer cb_data);
64 void (*get) (gpointer cb_data,
70 typedef void (*GSourceDummyMarshal) (void);
74 gboolean (*prepare) (GSource *source,
76 gboolean (*check) (GSource *source);
77 gboolean (*dispatch) (GSource *source,
80 void (*finalize) (GSource *source); /* Can be NULL */
82 /* For use by g_source_set_closure */
83 GSourceFunc closure_callback;
84 GSourceDummyMarshal closure_marshal; /* Really is of type GClosureMarshal */
87 /* Any definitions using GPollFD or GPollFunc are primarily
88 * for Unix and not guaranteed to be the compatible on all
89 * operating systems on which GLib runs. Right now, the
90 * GLib does use these functions on Win32 as well, but interprets
91 * them in a fairly different way than on Unix. If you use
92 * these definitions, you are should be prepared to recode
93 * for different operating systems.
96 * On Win32, the fd in a GPollFD should be Win32 HANDLE (*not* a file
97 * descriptor as provided by the C runtime) that can be used by
98 * MsgWaitForMultipleObjects. This does *not* include file handles
99 * from CreateFile, SOCKETs, nor pipe handles. (But you can use
100 * WSAEventSelect to signal events when a SOCKET is readable).
102 * On Win32, fd can also be the special value G_WIN32_MSG_HANDLE to
103 * indicate polling for messages. These message queue GPollFDs should
104 * be added with the g_main_poll_win32_msg_add function.
106 * But note that G_WIN32_MSG_HANDLE GPollFDs should not be used by GDK
107 * (GTK) programs, as GDK itself wants to read messages and convert them
110 * So, unless you really know what you are doing, it's best not to try
111 * to use the main loop polling stuff for your own needs on
112 * Win32. It's really only written for the GIMP's needs so
115 typedef struct _GPollFD GPollFD;
116 typedef gint (*GPollFunc) (GPollFD *ufds,
127 /* Standard priorities */
129 #define G_PRIORITY_HIGH -100
130 #define G_PRIORITY_DEFAULT 0
131 #define G_PRIORITY_HIGH_IDLE 100
132 #define G_PRIORITY_DEFAULT_IDLE 200
133 #define G_PRIORITY_LOW 300
137 GMainContext *g_main_context_new (void);
138 void g_main_context_ref (GMainContext *context);
139 void g_main_context_unref (GMainContext *context);
140 GMainContext *g_main_context_default (void);
142 gboolean g_main_context_iteration (GMainContext *context,
144 gboolean g_main_context_pending (GMainContext *context);
146 /* For implementation of legacy interfaces
148 GSource *g_main_context_find_source_by_id (GMainContext *context,
150 GSource *g_main_context_find_source_by_user_data (GMainContext *context,
152 GSource *g_main_context_find_source_by_funcs_user_data (GMainContext *context,
156 /* Low level functions for implementing custom main loops.
158 void g_main_context_wakeup (GMainContext *context);
159 gboolean g_main_context_acquire (GMainContext *context);
160 void g_main_context_release (GMainContext *context);
161 gboolean g_main_context_wait (GMainContext *context,
165 gboolean g_main_context_prepare (GMainContext *context,
167 gint g_main_context_query (GMainContext *context,
172 gint g_main_context_check (GMainContext *context,
176 void g_main_context_dispatch (GMainContext *context);
178 void g_main_context_set_poll_func (GMainContext *context,
180 GPollFunc g_main_context_get_poll_func (GMainContext *context);
182 /* Low level functions for use by source implementations
184 void g_main_context_add_poll (GMainContext *context,
187 void g_main_context_remove_poll (GMainContext *context,
192 GMainLoop *g_main_loop_new (GMainContext *context,
193 gboolean is_running);
194 void g_main_loop_run (GMainLoop *loop);
195 void g_main_loop_quit (GMainLoop *loop);
196 GMainLoop *g_main_loop_ref (GMainLoop *loop);
197 void g_main_loop_unref (GMainLoop *loop);
198 gboolean g_main_loop_is_running (GMainLoop *loop);
199 GMainContext *g_main_loop_get_context (GMainLoop *loop);
203 GSource *g_source_new (GSourceFuncs *source_funcs,
205 GSource *g_source_ref (GSource *source);
206 void g_source_unref (GSource *source);
208 guint g_source_attach (GSource *source,
209 GMainContext *context);
210 void g_source_destroy (GSource *source);
212 void g_source_set_priority (GSource *source,
214 gint g_source_get_priority (GSource *source);
215 void g_source_set_can_recurse (GSource *source,
216 gboolean can_recurse);
217 gboolean g_source_get_can_recurse (GSource *source);
218 guint g_source_get_id (GSource *source);
220 GMainContext *g_source_get_context (GSource *source);
222 void g_source_set_callback (GSource *source,
225 GDestroyNotify notify);
228 /* Used to implement g_source_connect_closure and internally*/
229 void g_source_set_callback_indirect (GSource *source,
230 gpointer callback_data,
231 GSourceCallbackFuncs *callback_funcs);
233 void g_source_add_poll (GSource *source,
235 void g_source_remove_poll (GSource *source,
238 void g_source_get_current_time (GSource *source,
241 /* void g_source_connect_closure (GSource *source,
245 /* Specific source types
247 GSource *g_idle_source_new (void);
248 GSource *g_timeout_source_new (guint interval);
250 /* Miscellaneous functions
252 void g_get_current_time (GTimeVal *result);
254 /* ============== Compat main loop stuff ================== */
256 #ifndef G_DISABLE_DEPRECATED
258 /* Legacy names for GMainLoop functions
260 #define g_main_new(is_running) g_main_loop_new (NULL, is_running);
261 #define g_main_run(loop) g_main_loop_run(loop)
262 #define g_main_quit(loop) g_main_loop_quit(loop)
263 #define g_main_destroy(loop) g_main_loop_unref(loop)
264 #define g_main_is_running(loop) g_main_loop_is_running(loop)
266 /* Functions to manipulate the default main loop
269 #define g_main_iteration(may_block) g_main_context_iteration (NULL, may_block)
270 #define g_main_pending() g_main_context_pending (NULL)
272 #define g_main_set_poll_func(func) g_main_context_set_poll_func (NULL, func)
274 #endif /* G_DISABLE_DEPRECATED */
276 /* Source manipulation by ID */
277 gboolean g_source_remove (guint tag);
278 gboolean g_source_remove_by_user_data (gpointer user_data);
279 gboolean g_source_remove_by_funcs_user_data (GSourceFuncs *funcs,
282 /* Idles and timeouts */
283 guint g_timeout_add_full (gint priority,
285 GSourceFunc function,
287 GDestroyNotify notify);
288 guint g_timeout_add (guint interval,
289 GSourceFunc function,
291 guint g_idle_add (GSourceFunc function,
293 guint g_idle_add_full (gint priority,
294 GSourceFunc function,
296 GDestroyNotify notify);
297 gboolean g_idle_remove_by_data (gpointer data);
299 /* Hook for GClosure / GSource integration. Don't touch */
300 GLIB_VAR GSourceFuncs g_timeout_funcs;
301 GLIB_VAR GSourceFuncs g_idle_funcs;
305 /* This is used to add polling for Windows messages. GDK (GTK+) programs
306 * should *not* use this.
308 void g_main_poll_win32_msg_add (gint priority,
311 #endif /* G_OS_WIN32 */
315 #endif /* __G_MAIN_H__ */