diff options
| author | Paul Durrant <paul.durrant@citrix.com> | 2019-09-13 09:21:56 +0100 |
|---|---|---|
| committer | Anthony PERARD <anthony.perard@citrix.com> | 2019-09-24 12:18:47 +0100 |
| commit | 374752a26b0ea487dd49c638ee35b97a58ce8e3b (patch) | |
| tree | fb774b006d163df618b14c0f72a10ee578210f3a /util | |
| parent | df6180bb56cd03949c2c64083da58755fed81a61 (diff) | |
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 <paul.durrant@citrix.com>
Reviewed-by: Anthony Perard <anthony.perard@citrix.com>
Message-Id: <20190913082159.31338-2-paul.durrant@citrix.com>
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Diffstat (limited to 'util')
| -rw-r--r-- | util/notify.c | 5 |
1 files changed, 5 insertions, 0 deletions
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); |