1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
|
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
* Component listener.
*
* Author:
* Rodrigo Moya <rodrigo@ximian.com>
*
* Copyright 2002, Ximian, Inc.
*/
#include <gtk/gtksignal.h>
#include <bonobo/bonobo-exception.h>
#include <bonobo/bonobo-object.h>
#include <gal/util/e-util.h>
#include "e-component-listener.h"
#include <libgnome/gnome-i18n.h>
#define PARENT_TYPE GTK_TYPE_OBJECT
#define DEFAULT_PING_DELAY 10000
struct _EComponentListenerPrivate {
Bonobo_Unknown component;
int ping_delay;
int ping_timeout_id;
};
static void e_component_listener_class_init (EComponentListenerClass *klass);
static void e_component_listener_init (EComponentListener *cl);
static void e_component_listener_destroy (GtkObject *object);
static GtkObjectClass *parent_class = NULL;
enum {
COMPONENT_DIED,
LAST_SIGNAL
};
static guint comp_listener_signals[LAST_SIGNAL];
static void
e_component_listener_class_init (EComponentListenerClass *klass)
{
GtkObjectClass *object_class = GTK_OBJECT_CLASS (klass);
parent_class = gtk_type_class (PARENT_TYPE);
object_class->destroy = e_component_listener_destroy;
klass->component_died = NULL;
comp_listener_signals[COMPONENT_DIED] =
gtk_signal_new ("component_died",
GTK_RUN_FIRST,
object_class->type,
GTK_SIGNAL_OFFSET (EComponentListenerClass, component_died),
gtk_marshal_NONE__NONE,
GTK_TYPE_NONE, 0);
gtk_object_class_add_signals (object_class, comp_listener_signals, LAST_SIGNAL);
}
static void
e_component_listener_init (EComponentListener *cl)
{
/* allocate internal structure */
cl->priv = g_new (EComponentListenerPrivate, 1);
cl->priv->component = CORBA_OBJECT_NIL;
cl->priv->ping_delay = DEFAULT_PING_DELAY;
cl->priv->ping_timeout_id = -1;
}
static void
e_component_listener_destroy (GtkObject *object)
{
EComponentListener *cl = (EComponentListener *) object;
g_return_if_fail (E_IS_COMPONENT_LISTENER (cl));
cl->priv->component = CORBA_OBJECT_NIL;
if (cl->priv->ping_timeout_id != -1) {
g_source_remove (cl->priv->ping_timeout_id);
cl->priv->ping_timeout_id = -1;
}
/* free memory */
g_free (cl->priv);
cl->priv = NULL;
if (GTK_OBJECT_CLASS (parent_class)->destroy)
(* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
}
GtkType
e_component_listener_get_type (void)
{
static GtkType type = 0;
if (!type) {
static const GtkTypeInfo info = {
"EComponentListener",
sizeof (EComponentListener),
sizeof (EComponentListenerClass),
(GtkClassInitFunc) e_component_listener_class_init,
(GtkObjectInitFunc) e_component_listener_init,
NULL, /* reserved_1 */
NULL, /* reserved_2 */
(GtkClassInitFunc) NULL
};
type = gtk_type_unique (PARENT_TYPE, &info);
}
return type;
}
static gboolean
ping_component_callback (gpointer user_data)
{
gboolean alive;
int is_nil;
CORBA_Environment ev;
EComponentListener *cl = (EComponentListener *) user_data;
g_return_val_if_fail (E_IS_COMPONENT_LISTENER (cl), FALSE);
if (cl->priv->component == CORBA_OBJECT_NIL)
return FALSE;
CORBA_exception_init (&ev);
is_nil = CORBA_Object_is_nil (cl->priv->component, &ev);
if (BONOBO_EX (&ev)) {
g_message (_("ping_timeout_callback: could not determine if the "
"CORBA object is nil or not"));
goto out;
}
CORBA_exception_free (&ev);
if (is_nil)
goto out;
alive = bonobo_unknown_ping (cl->priv->component);
if (alive)
return TRUE;
out:
/* the component has died, so we notify and close the timeout */
gtk_object_ref (GTK_OBJECT (cl));
gtk_signal_emit (GTK_OBJECT (cl), comp_listener_signals[COMPONENT_DIED]);
cl->priv->component = CORBA_OBJECT_NIL;
cl->priv->ping_timeout_id = -1;
gtk_object_unref (GTK_OBJECT (cl));
return FALSE;
}
static void
setup_ping_timeout (EComponentListener *cl)
{
if (cl->priv->ping_timeout_id != -1)
g_source_remove (cl->priv->ping_timeout_id);
cl->priv->ping_timeout_id = g_timeout_add (cl->priv->ping_delay,
ping_component_callback,
cl);
}
/**
* e_component_listener_new
* @comp: Component to listen for.
* @ping_delay: Delay (in ms) for pinging the component.
*
* Create a new #EComponentListener object, which allows to listen
* for a given component and get notified when that component dies.
*
* Returns: a component listener object.
*/
EComponentListener *
e_component_listener_new (Bonobo_Unknown comp, int ping_delay)
{
EComponentListener *cl;
cl = gtk_type_new (E_COMPONENT_LISTENER_TYPE);
cl->priv->component = comp;
/* set up the timeout function */
cl->priv->ping_delay = ping_delay > 0 ? ping_delay : DEFAULT_PING_DELAY;
setup_ping_timeout (cl);
return cl;
}
/**
* e_component_listener_get_ping_delay
* @cl: A #EComponentListener object.
*
* Get the ping delay being used to listen for an object.
*/
int
e_component_listener_get_ping_delay (EComponentListener *cl)
{
g_return_val_if_fail (E_IS_COMPONENT_LISTENER (cl), -1);
return cl->priv->ping_delay;
}
void
e_component_listener_set_ping_delay (EComponentListener *cl, int ping_delay)
{
g_return_if_fail (E_IS_COMPONENT_LISTENER (cl));
g_return_if_fail (ping_delay > 0);
cl->priv->ping_delay = ping_delay;
setup_ping_timeout (cl);
}
Bonobo_Unknown
e_component_listener_get_component (EComponentListener *cl)
{
g_return_val_if_fail (E_IS_COMPONENT_LISTENER (cl), CORBA_OBJECT_NIL);
return cl->priv->component;
}
void
e_component_listener_set_component (EComponentListener *cl, Bonobo_Unknown comp)
{
g_return_if_fail (E_IS_COMPONENT_LISTENER (cl));
cl->priv->component = comp;
setup_ping_timeout (cl);
}
|
