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authorAnthony Liguori <aliguori@us.ibm.com>2010-03-09 13:16:14 -0600
committerAnthony Liguori <aliguori@us.ibm.com>2010-03-19 15:27:32 -0500
commitd1e70c5e6d1472856c52969301247fe8c3c8389d (patch)
treecf8518783ecd1737ea4eb00ac1be7c7ed4d048f0 /notify.c
parentddbda4323e2bdc7cb3925b0f4080f9eb836a09e8 (diff)
Add support for generic notifier lists
Notifiers are data-less callbacks and a notifier list is a list of registered notifiers that all are interested in a particular event. We'll use this in a few patches to implement mouse change notification. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> --- v1 -> v2 - Do not do memory allocations by placing list nodes in notifier
Diffstat (limited to 'notify.c')
-rw-r--r--notify.c39
1 files changed, 39 insertions, 0 deletions
diff --git a/notify.c b/notify.c
new file mode 100644
index 0000000000..bcd3fc532f
--- /dev/null
+++ b/notify.c
@@ -0,0 +1,39 @@
+/*
+ * Notifier lists
+ *
+ * Copyright IBM, Corp. 2010
+ *
+ * Authors:
+ * Anthony Liguori <aliguori@us.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2. See
+ * the COPYING file in the top-level directory.
+ *
+ */
+
+#include "qemu-common.h"
+#include "notify.h"
+
+void notifier_list_init(NotifierList *list)
+{
+ QTAILQ_INIT(&list->notifiers);
+}
+
+void notifier_list_add(NotifierList *list, Notifier *notifier)
+{
+ QTAILQ_INSERT_HEAD(&list->notifiers, notifier, node);
+}
+
+void notifier_list_remove(NotifierList *list, Notifier *notifier)
+{
+ QTAILQ_REMOVE(&list->notifiers, notifier, node);
+}
+
+void notifier_list_notify(NotifierList *list)
+{
+ Notifier *notifier, *next;
+
+ QTAILQ_FOREACH_SAFE(notifier, &list->notifiers, node, next) {
+ notifier->notify(notifier);
+ }
+}