From 374752a26b0ea487dd49c638ee35b97a58ce8e3b Mon Sep 17 00:00:00 2001 From: Paul Durrant Date: Fri, 13 Sep 2019 09:21:56 +0100 Subject: xen / notify: introduce a new XenWatchList abstraction Xenstore watch call-backs are already abstracted away from XenBus using the XenWatch data structure but the associated NotifierList manipulation and file handle registration is still open coded in various xen_bus_...() functions. This patch creates a new XenWatchList data structure to allow these interactions to be abstracted away from XenBus as well. This is in preparation for a subsequent patch which will introduce separate watch lists for XenBus and XenDevice objects. NOTE: This patch also introduces a new notifier_list_empty() helper function for the purposes of adding an assertion that a XenWatchList is not freed whilst its associated NotifierList is still occupied. Signed-off-by: Paul Durrant Reviewed-by: Anthony Perard Message-Id: <20190913082159.31338-2-paul.durrant@citrix.com> Signed-off-by: Anthony PERARD --- util/notify.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'util/notify.c') diff --git a/util/notify.c b/util/notify.c index aee8d93cb0..76bab212ae 100644 --- a/util/notify.c +++ b/util/notify.c @@ -40,6 +40,11 @@ void notifier_list_notify(NotifierList *list, void *data) } } +bool notifier_list_empty(NotifierList *list) +{ + return QLIST_EMPTY(&list->notifiers); +} + void notifier_with_return_list_init(NotifierWithReturnList *list) { QLIST_INIT(&list->notifiers); -- cgit v1.2.3