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
|
/* GIO - GLib Input, Output and Streaming Library
*
* Copyright 2019 Red Hat, Inc.
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General
* Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "gmemorymonitor.h"
#include "gmemorymonitordbus.h"
#include "gioerror.h"
#include "ginitable.h"
#include "giomodule-priv.h"
#include "glibintl.h"
#include "glib/gstdio.h"
#include "gcancellable.h"
#include "gdbusproxy.h"
#include "gdbusnamewatching.h"
#define G_MEMORY_MONITOR_DBUS_GET_INITABLE_IFACE(o) (G_TYPE_INSTANCE_GET_INTERFACE ((o), G_TYPE_INITABLE, GInitable))
static void g_memory_monitor_dbus_iface_init (GMemoryMonitorInterface *iface);
static void g_memory_monitor_dbus_initable_iface_init (GInitableIface *iface);
struct _GMemoryMonitorDBus
{
GObject parent_instance;
guint watch_id;
GCancellable *cancellable;
GDBusProxy *proxy;
gulong signal_id;
};
G_DEFINE_TYPE_WITH_CODE (GMemoryMonitorDBus, g_memory_monitor_dbus, G_TYPE_OBJECT,
G_IMPLEMENT_INTERFACE (G_TYPE_INITABLE,
g_memory_monitor_dbus_initable_iface_init)
G_IMPLEMENT_INTERFACE (G_TYPE_MEMORY_MONITOR,
g_memory_monitor_dbus_iface_init)
_g_io_modules_ensure_extension_points_registered ();
g_io_extension_point_implement (G_MEMORY_MONITOR_EXTENSION_POINT_NAME,
g_define_type_id,
"dbus",
30))
static void
g_memory_monitor_dbus_init (GMemoryMonitorDBus *dbus)
{
}
static void
proxy_signal_cb (GDBusProxy *proxy,
const gchar *sender_name,
const gchar *signal_name,
GVariant *parameters,
GMemoryMonitorDBus *dbus)
{
guint8 level;
if (g_strcmp0 (signal_name, "LowMemoryWarning") != 0)
return;
if (parameters == NULL)
return;
g_variant_get (parameters, "(y)", &level);
g_signal_emit_by_name (dbus, "low-memory-warning", level);
}
static void
lmm_proxy_cb (GObject *source_object,
GAsyncResult *res,
gpointer user_data)
{
GMemoryMonitorDBus *dbus = user_data;
GDBusProxy *proxy;
GError *error = NULL;
proxy = g_dbus_proxy_new_finish (res, &error);
if (!proxy)
{
g_debug ("Failed to create LowMemoryMonitor D-Bus proxy: %s",
error->message);
g_error_free (error);
return;
}
dbus->signal_id = g_signal_connect (G_OBJECT (proxy), "g-signal",
G_CALLBACK (proxy_signal_cb), dbus);
dbus->proxy = proxy;
}
static void
lmm_appeared_cb (GDBusConnection *connection,
const gchar *name,
const gchar *name_owner,
gpointer user_data)
{
GMemoryMonitorDBus *dbus = user_data;
g_dbus_proxy_new (connection,
G_DBUS_PROXY_FLAGS_DO_NOT_AUTO_START,
NULL,
"org.freedesktop.LowMemoryMonitor",
"/org/freedesktop/LowMemoryMonitor",
"org.freedesktop.LowMemoryMonitor",
dbus->cancellable,
lmm_proxy_cb,
dbus);
}
static void
lmm_vanished_cb (GDBusConnection *connection,
const gchar *name,
gpointer user_data)
{
GMemoryMonitorDBus *dbus = user_data;
g_clear_signal_handler (&dbus->signal_id, dbus->proxy);
g_clear_object (&dbus->proxy);
}
static gboolean
g_memory_monitor_dbus_initable_init (GInitable *initable,
GCancellable *cancellable,
GError **error)
{
GMemoryMonitorDBus *dbus = G_MEMORY_MONITOR_DBUS (initable);
dbus->cancellable = g_cancellable_new ();
dbus->watch_id = g_bus_watch_name (G_BUS_TYPE_SYSTEM,
"org.freedesktop.LowMemoryMonitor",
G_BUS_NAME_WATCHER_FLAGS_AUTO_START,
lmm_appeared_cb,
lmm_vanished_cb,
dbus,
NULL);
return TRUE;
}
static void
g_memory_monitor_dbus_finalize (GObject *object)
{
GMemoryMonitorDBus *dbus = G_MEMORY_MONITOR_DBUS (object);
g_cancellable_cancel (dbus->cancellable);
g_clear_object (&dbus->cancellable);
g_clear_signal_handler (&dbus->signal_id, dbus->proxy);
g_clear_object (&dbus->proxy);
g_clear_handle_id (&dbus->watch_id, g_bus_unwatch_name);
G_OBJECT_CLASS (g_memory_monitor_dbus_parent_class)->finalize (object);
}
static void
g_memory_monitor_dbus_class_init (GMemoryMonitorDBusClass *nl_class)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (nl_class);
gobject_class->finalize = g_memory_monitor_dbus_finalize;
}
static void
g_memory_monitor_dbus_iface_init (GMemoryMonitorInterface *monitor_iface)
{
}
static void
g_memory_monitor_dbus_initable_iface_init (GInitableIface *iface)
{
iface->init = g_memory_monitor_dbus_initable_init;
}
|
