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 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, write to the
16 * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
17 * Boston, MA 02111-1307, USA.
22 #include "gsourceclosure.h"
27 #include "gvaluetypes.h"
29 #include "glib-unix.h"
32 G_DEFINE_BOXED_TYPE (GIOChannel, g_io_channel, g_io_channel_ref, g_io_channel_unref)
35 g_io_condition_get_type (void)
37 static GType etype = 0;
40 static const GFlagsValue values[] = {
41 { G_IO_IN, "G_IO_IN", "in" },
42 { G_IO_OUT, "G_IO_OUT", "out" },
43 { G_IO_PRI, "G_IO_PRI", "pri" },
44 { G_IO_ERR, "G_IO_ERR", "err" },
45 { G_IO_HUP, "G_IO_HUP", "hup" },
46 { G_IO_NVAL, "G_IO_NVAL", "nval" },
49 etype = g_flags_register_static ("GIOCondition", values);
54 /* We need to hand-write this marshaler, since it doesn't have an
58 source_closure_marshal_BOOLEAN__VOID (GClosure *closure,
61 const GValue *param_values,
62 gpointer invocation_hint,
63 gpointer marshal_data)
66 GCClosure *cc = (GCClosure*) closure;
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);
80 io_watch_closure_callback (GIOChannel *channel,
81 GIOCondition condition,
84 GClosure *closure = data;
86 GValue params[2] = { G_VALUE_INIT, G_VALUE_INIT };
87 GValue result_value = G_VALUE_INIT;
90 g_value_init (&result_value, G_TYPE_BOOLEAN);
91 g_value_init (¶ms[0], G_TYPE_IO_CHANNEL);
92 g_value_set_boxed (¶ms[0], channel);
94 g_value_init (¶ms[1], G_TYPE_IO_CONDITION);
95 g_value_set_flags (¶ms[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 (¶ms[0]);
102 g_value_unset (¶ms[1]);
108 g_child_watch_closure_callback (GPid pid,
112 GClosure *closure = data;
114 GValue params[2] = { G_VALUE_INIT, G_VALUE_INIT };
115 GValue result_value = G_VALUE_INIT;
118 g_value_init (&result_value, G_TYPE_BOOLEAN);
121 g_value_init (¶ms[0], G_TYPE_ULONG);
122 g_value_set_ulong (¶ms[0], pid);
125 g_value_init (¶ms[0], G_TYPE_POINTER);
126 g_value_set_pointer (¶ms[0], pid);
129 g_value_init (¶ms[1], G_TYPE_INT);
130 g_value_set_int (¶ms[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 (¶ms[0]);
137 g_value_unset (¶ms[1]);
144 g_unix_fd_source_closure_callback (int fd,
145 GIOCondition condition,
148 GClosure *closure = data;
150 GValue params[2] = { G_VALUE_INIT, G_VALUE_INIT };
151 GValue result_value = G_VALUE_INIT;
154 g_value_init (&result_value, G_TYPE_BOOLEAN);
156 g_value_init (¶ms[0], G_TYPE_INT);
157 g_value_set_int (¶ms[0], fd);
159 g_value_init (¶ms[1], G_TYPE_IO_CONDITION);
160 g_value_set_flags (¶ms[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 (¶ms[0]);
167 g_value_unset (¶ms[1]);
174 source_closure_callback (gpointer data)
176 GClosure *closure = data;
177 GValue result_value = G_VALUE_INIT;
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);
191 closure_callback_get (gpointer cb_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;
205 else if (source->source_funcs == &g_unix_fd_source_funcs)
206 closure_callback = (GSourceFunc)g_unix_fd_source_closure_callback;
208 else if (source->source_funcs == &g_timeout_funcs ||
210 source->source_funcs == &g_unix_signal_funcs ||
212 source->source_funcs == &g_idle_funcs)
213 closure_callback = source_closure_callback;
216 *func = closure_callback;
220 static GSourceCallbackFuncs closure_callback_funcs = {
221 (void (*) (gpointer)) g_closure_ref,
222 (void (*) (gpointer)) g_closure_unref,
227 closure_invalidated (gpointer user_data,
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.
245 g_source_set_closure (GSource *source,
248 g_return_if_fail (source != NULL);
249 g_return_if_fail (closure != NULL);
251 if (!source->source_funcs->closure_callback &&
253 source->source_funcs != &g_unix_fd_source_funcs &&
254 source->source_funcs != &g_unix_signal_funcs &&
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");
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;
275 g_closure_set_marshal (closure, marshal);
276 else if (source->source_funcs == &g_idle_funcs ||
278 source->source_funcs == &g_unix_signal_funcs ||
280 source->source_funcs == &g_timeout_funcs)
281 g_closure_set_marshal (closure, source_closure_marshal_BOOLEAN__VOID);
283 g_closure_set_marshal (closure, g_cclosure_marshal_generic);
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
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
315 g_source_set_dummy_callback (GSource *source)
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);