static void
connection_get_cb (GObject *source_object,
GAsyncResult *res,
gpointer user_data)
{
Client *client = user_data;
client->connection = g_bus_get_finish (res, NULL);
if (client->connection == NULL)
{
call_lost_handler (client);
goto out;
}
/* No need to schedule this in idle as we're already in the thread
* that the user called g_bus_own_name() from. This is because
* g_bus_get() guarantees that.
*
* Also, we need to ensure that the handler is invoked *before*
* we call RequestName(). Otherwise there is a race.
*/
if (client->bus_acquired_handler != NULL)
{
client->bus_acquired_handler (client->connection,
client->name,
client->user_data);
}
has_connection (client);
out:
client_unref (client);
}
static void
on_connection_disconnected (GDBusConnection *connection,
gboolean remote_peer_vanished,
GError *error,
gpointer user_data)
{
Client *client = user_data;
if (client->disconnected_signal_handler_id > 0)
g_signal_handler_disconnect (client->connection, client->disconnected_signal_handler_id);
if (client->name_acquired_subscription_id > 0)
g_dbus_connection_signal_unsubscribe (client->connection, client->name_acquired_subscription_id);
if (client->name_lost_subscription_id > 0)
g_dbus_connection_signal_unsubscribe (client->connection, client->name_lost_subscription_id);
g_object_unref (client->connection);
client->disconnected_signal_handler_id = 0;
client->name_acquired_subscription_id = 0;
client->name_lost_subscription_id = 0;
client->connection = NULL;
call_lost_handler (client);
}
static void
on_name_lost_or_acquired (GDBusConnection *connection,
const gchar *sender_name,
const gchar *object_path,
const gchar *interface_name,
const gchar *signal_name,
GVariant *parameters,
gpointer user_data)
{
Client *client = user_data;
const gchar *name;
if (g_strcmp0 (object_path, "/org/freedesktop/DBus") != 0 ||
g_strcmp0 (interface_name, "org.freedesktop.DBus") != 0 ||
g_strcmp0 (sender_name, "org.freedesktop.DBus") != 0)
goto out;
if (g_strcmp0 (signal_name, "NameLost") == 0)
{
g_variant_get (parameters, "(&s)", &name);
if (g_strcmp0 (name, client->name) == 0)
{
call_lost_handler (client);
}
}
else if (g_strcmp0 (signal_name, "NameAcquired") == 0)
{
g_variant_get (parameters, "(&s)", &name);
if (g_strcmp0 (name, client->name) == 0)
{
call_acquired_handler (client);
}
}
out:
;
}
static void
request_name_cb (GObject *source_object,
GAsyncResult *res,
gpointer user_data)
{
Client *client = user_data;
GVariant *result;
guint32 request_name_reply;
gboolean subscribe;
request_name_reply = 0;
result = NULL;
/* don't use client->connection - it may be NULL already */
result = g_dbus_connection_call_finish (G_DBUS_CONNECTION (source_object),
res,
NULL);
if (result != NULL)
{
g_variant_get (result, "(u)", &request_name_reply);
g_variant_unref (result);
}
subscribe = FALSE;
switch (request_name_reply)
{
case 1: /* DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER */
/* We got the name - now listen for NameLost and NameAcquired */
call_acquired_handler (client);
subscribe = TRUE;
client->needs_release = TRUE;
break;
case 2: /* DBUS_REQUEST_NAME_REPLY_IN_QUEUE */
/* Waiting in line - listen for NameLost and NameAcquired */
call_lost_handler (client);
subscribe = TRUE;
client->needs_release = TRUE;
break;
default:
/* assume we couldn't get the name - explicit fallthrough */
case 3: /* DBUS_REQUEST_NAME_REPLY_EXISTS */
case 4: /* DBUS_REQUEST_NAME_REPLY_ALREADY_OWNER */
/* Some other part of the process is already owning the name */
call_lost_handler (client);
break;
}
if (subscribe)
{
GDBusConnection *connection = NULL;
/* if cancelled, there is no point in subscribing to signals - if not, make sure
* we use a known good Connection object since it may be set to NULL at any point
* after being cancelled
*/
G_LOCK (lock);
if (!client->cancelled)
connection = g_object_ref (client->connection);
G_UNLOCK (lock);
/* start listening to NameLost and NameAcquired messages */
if (connection != NULL)
{
client->name_lost_subscription_id =
g_dbus_connection_signal_subscribe (connection,
"org.freedesktop.DBus",
"org.freedesktop.DBus",
"NameLost",
"/org/freedesktop/DBus",
client->name,
G_DBUS_SIGNAL_FLAGS_NONE,
on_name_lost_or_acquired,
client,
NULL);
client->name_acquired_subscription_id =
g_dbus_connection_signal_subscribe (connection,
"org.freedesktop.DBus",
"org.freedesktop.DBus",
"NameAcquired",
"/org/freedesktop/DBus",
client->name,
G_DBUS_SIGNAL_FLAGS_NONE,
on_name_lost_or_acquired,
client,
NULL);
g_object_unref (connection);
}
}
client_unref (client);
}
static void
request_name_cb (GObject *source_object,
GAsyncResult *res,
gpointer user_data)
{
Client *client = user_data;
GVariant *result;
guint32 request_name_reply;
gboolean subscribe;
request_name_reply = 0;
result = NULL;
result = g_dbus_connection_call_finish (client->connection,
res,
NULL);
if (result != NULL)
{
g_variant_get (result, "(u)", &request_name_reply);
g_variant_unref (result);
}
subscribe = FALSE;
switch (request_name_reply)
{
case 1: /* DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER */
/* We got the name - now listen for NameLost and NameAcquired */
call_acquired_handler (client);
subscribe = TRUE;
client->needs_release = TRUE;
break;
case 2: /* DBUS_REQUEST_NAME_REPLY_IN_QUEUE */
/* Waiting in line - listen for NameLost and NameAcquired */
call_lost_handler (client);
subscribe = TRUE;
client->needs_release = TRUE;
break;
default:
/* assume we couldn't get the name - explicit fallthrough */
case 3: /* DBUS_REQUEST_NAME_REPLY_EXISTS */
case 4: /* DBUS_REQUEST_NAME_REPLY_ALREADY_OWNER */
/* Some other part of the process is already owning the name */
call_lost_handler (client);
break;
}
if (subscribe)
{
/* start listening to NameLost and NameAcquired messages */
client->name_lost_subscription_id =
g_dbus_connection_signal_subscribe (client->connection,
"org.freedesktop.DBus",
"org.freedesktop.DBus",
"NameLost",
"/org/freedesktop/DBus",
client->name,
on_name_lost_or_acquired,
client,
NULL);
client->name_acquired_subscription_id =
g_dbus_connection_signal_subscribe (client->connection,
"org.freedesktop.DBus",
"org.freedesktop.DBus",
"NameAcquired",
"/org/freedesktop/DBus",
client->name,
on_name_lost_or_acquired,
client,
NULL);
}
client_unref (client);
}
