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libsysprof: watch bus name changes for target bus peer

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This commit is contained in:
Christian Hergert
2019-06-04 18:51:12 -07:00
parent 5402074c53
commit e8b9d19f92
1 changed files with 56 additions and 4 deletions
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60
src/libsysprof/sysprof-proxy-source.c
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@ -69,6 +69,13 @@ steal_fd (gint *fd)
return r;
}
static void
_g_weak_ref_free (GWeakRef *wr)
{
g_weak_ref_clear (wr);
g_slice_free (GWeakRef, wr);
}
static void
peer_free (Peer *peer)
{
@ -317,6 +324,35 @@ sysprof_proxy_source_list_names_cb (GObject *object,
}
}
static void
sysprof_proxy_source_name_owner_changed_cb (GDBusConnection *connection,
const gchar *sender_name,
const gchar *object_path,
const gchar *interface_name,
const gchar *signal_name,
GVariant *params,
gpointer user_data)
{
GWeakRef *wr = user_data;
g_autoptr(SysprofProxySource) self = NULL;
const gchar *name;
const gchar *old_name;
const gchar *new_name;
g_assert (G_IS_DBUS_CONNECTION (connection));
g_assert (params != NULL);
g_assert (g_variant_is_of_type (params, G_VARIANT_TYPE ("(sss)")));
g_assert (wr != NULL);
g_variant_get (params, "(&s&s&s)", &name, &old_name, &new_name);
if (!(self = g_weak_ref_get (wr)))
return;
if (self->bus_name != NULL && g_strcmp0 (name, self->bus_name) == 0)
sysprof_proxy_source_monitor (self, connection, new_name);
}
static void
sysprof_proxy_source_get_bus_cb (GObject *object,
GAsyncResult *result,
@ -336,10 +372,28 @@ sysprof_proxy_source_get_bus_cb (GObject *object,
return;
}
if (self->bus_name != NULL && self->bus_name[0])
if (self->bus_name != NULL && g_dbus_is_name (self->bus_name))
{
GWeakRef *wr;
/* Try to monitor immediately */
sysprof_proxy_source_monitor (self, bus, self->bus_name);
return;
/* Watch for changes in case the program isn't started yet and
* we want to monitor it after it is available.
*/
wr = g_slice_new0 (GWeakRef);
g_weak_ref_init (wr, self);
g_dbus_connection_signal_subscribe (bus,
NULL,
"org.freedesktop.DBus",
"NameOwnerChanged",
NULL,
NULL,
0,
sysprof_proxy_source_name_owner_changed_cb,
g_steal_pointer (&wr),
(GDestroyNotify)_g_weak_ref_free);
}
if (self->pids->len > 0)
@ -362,8 +416,6 @@ sysprof_proxy_source_get_bus_cb (GObject *object,
g_object_ref (self));
return;
}
g_warning ("Improperly configured %s", G_OBJECT_TYPE_NAME (self));
}
static void