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Code Issues Releases Activity

Fix crash when calling g_dbus_remove_watch from watch callback

This commit is contained in:
Luiz Augusto von Dentz 2009-05-06 17:15:27 -03:00 committed by Marcel Holtmann
parent d2e73f2d30
commit 5106f7a8cf
1 changed files with 41 additions and 10 deletions
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51
gdbus/watch.c
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@ -54,6 +54,8 @@ struct name_data {
DBusConnection *connection;
char *name;
GSList *callbacks;
GSList *processed;
gboolean lock;
};
static struct name_data *name_data_find(DBusConnection *connection,
@ -146,7 +148,11 @@ static int name_data_add(DBusConnection *connection, const char *name,
name_listeners = g_slist_append(name_listeners, data);
done:
data->callbacks = g_slist_append(data->callbacks, cb);
if (data->lock)
data->processed = g_slist_append(data->processed, cb);
else
data->callbacks = g_slist_append(data->callbacks, cb);
return first;
}
@ -229,10 +235,9 @@ static gboolean remove_match(DBusConnection *connection, const char *name)
static DBusHandlerResult name_exit_filter(DBusConnection *connection,
DBusMessage *message, void *user_data)
{
GSList *l;
struct name_data *data;
struct name_callback *cb;
char *name, *old, *new;
int keep = 0;
if (!dbus_message_is_signal(message, DBUS_INTERFACE_DBUS,
"NameOwnerChanged"))
@ -253,8 +258,11 @@ static DBusHandlerResult name_exit_filter(DBusConnection *connection,
return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
}
for (l = data->callbacks; l != NULL; l = l->next) {
struct name_callback *cb = l->data;
data->lock = TRUE;
while (data->callbacks) {
cb = data->callbacks->data;
if (*new == '\0') {
if (cb->disc_func)
cb->disc_func(connection, cb->user_data);
@ -262,11 +270,27 @@ static DBusHandlerResult name_exit_filter(DBusConnection *connection,
if (cb->conn_func)
cb->conn_func(connection, cb->user_data);
}
if (cb->conn_func && cb->disc_func)
keep = 1;
/* Check if the watch was removed/freed by the callback
* function */
if (!g_slist_find(data->callbacks, cb))
continue;
data->callbacks = g_slist_remove(data->callbacks, cb);
if (!cb->conn_func || !cb->disc_func) {
g_free(cb);
continue;
}
data->processed = g_slist_append(data->processed, cb);
}
if (keep)
data->callbacks = data->processed;
data->processed = NULL;
data->lock = FALSE;
if (data->callbacks)
return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
name_listeners = g_slist_remove(name_listeners, data);
@ -349,16 +373,23 @@ gboolean g_dbus_remove_watch(DBusConnection *connection, guint id)
if (cb->id == id)
goto remove;
}
for (lcb = data->processed; lcb; lcb = lcb->next) {
cb = lcb->data;
if (cb->id == id)
goto remove;
}
}
return FALSE;
remove:
data->callbacks = g_slist_remove(data->callbacks, cb);
data->processed = g_slist_remove(data->processed, cb);
g_free(cb);
/* Don't remove the filter if other callbacks exist */
if (data->callbacks)
/* Don't remove the filter if other callbacks exist or data is lock
* processing callbacks */
if (data->callbacks || data->lock)
return TRUE;
if (data->name) {