Add a wrapper for the AddFull document portal api
[glib.git] / gobject / gsourceclosure.c
blob8ee0266c56899abcdb0b5505e1f9d089919033b1
1 /* GObject - GLib Type, Object, Parameter and Signal Library
2 * Copyright (C) 2001 Red Hat, Inc.
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 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 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General
15 * Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
18 #include "config.h"
20 #include "gsourceclosure.h"
21 #include "gboxed.h"
22 #include "genums.h"
23 #include "gmarshal.h"
24 #include "gvalue.h"
25 #include "gvaluetypes.h"
26 #ifdef G_OS_UNIX
27 #include "glib-unix.h"
28 #endif
30 G_DEFINE_BOXED_TYPE (GIOChannel, g_io_channel, g_io_channel_ref, g_io_channel_unref)
32 GType
33 g_io_condition_get_type (void)
35 static volatile GType etype = 0;
37 if (g_once_init_enter (&etype))
39 static const GFlagsValue values[] = {
40 { G_IO_IN, "G_IO_IN", "in" },
41 { G_IO_OUT, "G_IO_OUT", "out" },
42 { G_IO_PRI, "G_IO_PRI", "pri" },
43 { G_IO_ERR, "G_IO_ERR", "err" },
44 { G_IO_HUP, "G_IO_HUP", "hup" },
45 { G_IO_NVAL, "G_IO_NVAL", "nval" },
46 { 0, NULL, NULL }
48 GType type_id = g_flags_register_static ("GIOCondition", values);
49 g_once_init_leave (&etype, type_id);
51 return etype;
54 /* We need to hand-write this marshaler, since it doesn't have an
55 * instance object.
57 static void
58 source_closure_marshal_BOOLEAN__VOID (GClosure *closure,
59 GValue *return_value,
60 guint n_param_values,
61 const GValue *param_values,
62 gpointer invocation_hint,
63 gpointer marshal_data)
65 GSourceFunc callback;
66 GCClosure *cc = (GCClosure*) closure;
67 gboolean v_return;
69 g_return_if_fail (return_value != NULL);
70 g_return_if_fail (n_param_values == 0);
72 callback = (GSourceFunc) (marshal_data ? marshal_data : cc->callback);
74 v_return = callback (closure->data);
76 g_value_set_boolean (return_value, v_return);
79 static gboolean
80 io_watch_closure_callback (GIOChannel *channel,
81 GIOCondition condition,
82 gpointer data)
84 GClosure *closure = data;
86 GValue params[2] = { G_VALUE_INIT, G_VALUE_INIT };
87 GValue result_value = G_VALUE_INIT;
88 gboolean result;
90 g_value_init (&result_value, G_TYPE_BOOLEAN);
91 g_value_init (&params[0], G_TYPE_IO_CHANNEL);
92 g_value_set_boxed (&params[0], channel);
94 g_value_init (&params[1], G_TYPE_IO_CONDITION);
95 g_value_set_flags (&params[1], condition);
97 g_closure_invoke (closure, &result_value, 2, params, NULL);
99 result = g_value_get_boolean (&result_value);
100 g_value_unset (&result_value);
101 g_value_unset (&params[0]);
102 g_value_unset (&params[1]);
104 return result;
107 static gboolean
108 g_child_watch_closure_callback (GPid pid,
109 gint status,
110 gpointer data)
112 GClosure *closure = data;
114 GValue params[2] = { G_VALUE_INIT, G_VALUE_INIT };
115 GValue result_value = G_VALUE_INIT;
116 gboolean result;
118 g_value_init (&result_value, G_TYPE_BOOLEAN);
120 #ifdef G_OS_UNIX
121 g_value_init (&params[0], G_TYPE_ULONG);
122 g_value_set_ulong (&params[0], pid);
123 #endif
124 #ifdef G_OS_WIN32
125 g_value_init (&params[0], G_TYPE_POINTER);
126 g_value_set_pointer (&params[0], pid);
127 #endif
129 g_value_init (&params[1], G_TYPE_INT);
130 g_value_set_int (&params[1], status);
132 g_closure_invoke (closure, &result_value, 2, params, NULL);
134 result = g_value_get_boolean (&result_value);
135 g_value_unset (&result_value);
136 g_value_unset (&params[0]);
137 g_value_unset (&params[1]);
139 return result;
142 #ifdef G_OS_UNIX
143 static gboolean
144 g_unix_fd_source_closure_callback (int fd,
145 GIOCondition condition,
146 gpointer data)
148 GClosure *closure = data;
150 GValue params[2] = { G_VALUE_INIT, G_VALUE_INIT };
151 GValue result_value = G_VALUE_INIT;
152 gboolean result;
154 g_value_init (&result_value, G_TYPE_BOOLEAN);
156 g_value_init (&params[0], G_TYPE_INT);
157 g_value_set_int (&params[0], fd);
159 g_value_init (&params[1], G_TYPE_IO_CONDITION);
160 g_value_set_flags (&params[1], condition);
162 g_closure_invoke (closure, &result_value, 2, params, NULL);
164 result = g_value_get_boolean (&result_value);
165 g_value_unset (&result_value);
166 g_value_unset (&params[0]);
167 g_value_unset (&params[1]);
169 return result;
171 #endif
173 static gboolean
174 source_closure_callback (gpointer data)
176 GClosure *closure = data;
177 GValue result_value = G_VALUE_INIT;
178 gboolean result;
180 g_value_init (&result_value, G_TYPE_BOOLEAN);
182 g_closure_invoke (closure, &result_value, 0, NULL, NULL);
184 result = g_value_get_boolean (&result_value);
185 g_value_unset (&result_value);
187 return result;
190 static void
191 closure_callback_get (gpointer cb_data,
192 GSource *source,
193 GSourceFunc *func,
194 gpointer *data)
196 GSourceFunc closure_callback = source->source_funcs->closure_callback;
198 if (!closure_callback)
200 if (source->source_funcs == &g_io_watch_funcs)
201 closure_callback = (GSourceFunc)io_watch_closure_callback;
202 else if (source->source_funcs == &g_child_watch_funcs)
203 closure_callback = (GSourceFunc)g_child_watch_closure_callback;
204 #ifdef G_OS_UNIX
205 else if (source->source_funcs == &g_unix_fd_source_funcs)
206 closure_callback = (GSourceFunc)g_unix_fd_source_closure_callback;
207 #endif
208 else if (source->source_funcs == &g_timeout_funcs ||
209 #ifdef G_OS_UNIX
210 source->source_funcs == &g_unix_signal_funcs ||
211 #endif
212 source->source_funcs == &g_idle_funcs)
213 closure_callback = source_closure_callback;
216 *func = closure_callback;
217 *data = cb_data;
220 static GSourceCallbackFuncs closure_callback_funcs = {
221 (void (*) (gpointer)) g_closure_ref,
222 (void (*) (gpointer)) g_closure_unref,
223 closure_callback_get
226 static void
227 closure_invalidated (gpointer user_data,
228 GClosure *closure)
230 g_source_destroy (user_data);
234 * g_source_set_closure:
235 * @source: the source
236 * @closure: a #GClosure
238 * Set the callback for a source as a #GClosure.
240 * If the source is not one of the standard GLib types, the @closure_callback
241 * and @closure_marshal fields of the #GSourceFuncs structure must have been
242 * filled in with pointers to appropriate functions.
244 void
245 g_source_set_closure (GSource *source,
246 GClosure *closure)
248 g_return_if_fail (source != NULL);
249 g_return_if_fail (closure != NULL);
251 if (!source->source_funcs->closure_callback &&
252 #ifdef G_OS_UNIX
253 source->source_funcs != &g_unix_fd_source_funcs &&
254 source->source_funcs != &g_unix_signal_funcs &&
255 #endif
256 source->source_funcs != &g_child_watch_funcs &&
257 source->source_funcs != &g_io_watch_funcs &&
258 source->source_funcs != &g_timeout_funcs &&
259 source->source_funcs != &g_idle_funcs)
261 g_critical (G_STRLOC ": closure can not be set on closure without GSourceFuncs::closure_callback\n");
262 return;
265 g_closure_ref (closure);
266 g_closure_sink (closure);
267 g_source_set_callback_indirect (source, closure, &closure_callback_funcs);
269 g_closure_add_invalidate_notifier (closure, source, closure_invalidated);
271 if (G_CLOSURE_NEEDS_MARSHAL (closure))
273 GClosureMarshal marshal = (GClosureMarshal)source->source_funcs->closure_marshal;
274 if (marshal)
275 g_closure_set_marshal (closure, marshal);
276 else if (source->source_funcs == &g_idle_funcs ||
277 #ifdef G_OS_UNIX
278 source->source_funcs == &g_unix_signal_funcs ||
279 #endif
280 source->source_funcs == &g_timeout_funcs)
281 g_closure_set_marshal (closure, source_closure_marshal_BOOLEAN__VOID);
282 else
283 g_closure_set_marshal (closure, g_cclosure_marshal_generic);
287 static void
288 dummy_closure_marshal (GClosure *closure,
289 GValue *return_value,
290 guint n_param_values,
291 const GValue *param_values,
292 gpointer invocation_hint,
293 gpointer marshal_data)
295 if (G_VALUE_HOLDS_BOOLEAN (return_value))
296 g_value_set_boolean (return_value, TRUE);
300 * g_source_set_dummy_callback:
301 * @source: the source
303 * Sets a dummy callback for @source. The callback will do nothing, and
304 * if the source expects a #gboolean return value, it will return %TRUE.
305 * (If the source expects any other type of return value, it will return
306 * a 0/%NULL value; whatever g_value_init() initializes a #GValue to for
307 * that type.)
309 * If the source is not one of the standard GLib types, the
310 * @closure_callback and @closure_marshal fields of the #GSourceFuncs
311 * structure must have been filled in with pointers to appropriate
312 * functions.
314 void
315 g_source_set_dummy_callback (GSource *source)
317 GClosure *closure;
319 closure = g_closure_new_simple (sizeof (GClosure), NULL);
320 g_closure_set_meta_marshal (closure, NULL, dummy_closure_marshal);
321 g_source_set_closure (source, closure);