From 096eee1d6acbf8c28e880ccb7d214f6589f07191 Mon Sep 17 00:00:00 2001 From: "Eduardo Lima (Etrunko)" Date: Thu, 2 Feb 2017 15:13:48 -0200 Subject: [PATCH 3/3] proxy: Check if operation is cancelled before disconnecting signal According to the documentation, g_cancellable_disconnect() waits for the signal handler to finish, and if it is called from the handler itself, it will result in a deadlock. To avoid it, we check if the operation is cancelled and if so, call g_signal_handler_disconnect() instead of g_cancellable_disconnect(). https://developer.gnome.org/gio/stable/GCancellable.html#g-cancellable-disconnect Signed-off-by: Eduardo Lima (Etrunko) --- govirt/ovirt-proxy.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/govirt/ovirt-proxy.c b/govirt/ovirt-proxy.c index 2ff05cd..deea43f 100644 --- a/govirt/ovirt-proxy.c +++ b/govirt/ovirt-proxy.c @@ -218,7 +218,15 @@ static void ovirt_proxy_call_async_data_free(OvirtProxyCallAsyncData *data) g_object_unref(G_OBJECT(data->result)); } if ((data->cancellable != NULL) && (data->cancellable_cb_id != 0)) { - g_cancellable_disconnect(data->cancellable, data->cancellable_cb_id); + if (g_cancellable_is_cancelled(data->cancellable)) { + /* Cancellable has already been cancelled, we don't need to use + * g_cancellable_disconnect() to disconnect the signal handler + * as we know the 'cancelled' signal is no longer going to be emitted + */ + g_signal_handler_disconnect(data->cancellable, data->cancellable_cb_id); + } else { + g_cancellable_disconnect(data->cancellable, data->cancellable_cb_id); + } } g_clear_object(&data->cancellable); g_slice_free(OvirtProxyCallAsyncData, data); -- 2.9.3