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authorAnand Avati <avati@redhat.com>2013-03-06 01:11:59 -0800
committerAnand Avati <avati@redhat.com>2013-09-03 11:25:33 -0700
commit0d60175bd684cf6a14f750579d82dbd1ba97fcbc (patch)
tree1571f530548196006526442f3fc027cb623bb6fa /contrib/qemu/include/qemu/notify.h
parent7dbfbfd3694e02b90e8f3ce509f5279da1523a02 (diff)
contrib/qemu: Import qemu block source code
This qemu block format source code and its minimal dependency files will be used in the next patch to implement a qemu-block format translator. Change-Id: Ic87638972f7ea9b3df84d7a0539512a250c11c1c BUG: 986775 Signed-off-by: Anand Avati <avati@redhat.com> Reviewed-on: http://review.gluster.org/5366 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Brian Foster <bfoster@redhat.com>
Diffstat (limited to 'contrib/qemu/include/qemu/notify.h')
-rw-r--r--contrib/qemu/include/qemu/notify.h72
1 files changed, 72 insertions, 0 deletions
diff --git a/contrib/qemu/include/qemu/notify.h b/contrib/qemu/include/qemu/notify.h
new file mode 100644
index 00000000..a3d73e4b
--- /dev/null
+++ b/contrib/qemu/include/qemu/notify.h
@@ -0,0 +1,72 @@
+/*
+ * 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.
+ *
+ */
+
+#ifndef QEMU_NOTIFY_H
+#define QEMU_NOTIFY_H
+
+#include "qemu/queue.h"
+
+typedef struct Notifier Notifier;
+
+struct Notifier
+{
+ void (*notify)(Notifier *notifier, void *data);
+ QLIST_ENTRY(Notifier) node;
+};
+
+typedef struct NotifierList
+{
+ QLIST_HEAD(, Notifier) notifiers;
+} NotifierList;
+
+#define NOTIFIER_LIST_INITIALIZER(head) \
+ { QLIST_HEAD_INITIALIZER((head).notifiers) }
+
+void notifier_list_init(NotifierList *list);
+
+void notifier_list_add(NotifierList *list, Notifier *notifier);
+
+void notifier_remove(Notifier *notifier);
+
+void notifier_list_notify(NotifierList *list, void *data);
+
+/* Same as Notifier but allows .notify() to return errors */
+typedef struct NotifierWithReturn NotifierWithReturn;
+
+struct NotifierWithReturn {
+ /**
+ * Return 0 on success (next notifier will be invoked), otherwise
+ * notifier_with_return_list_notify() will stop and return the value.
+ */
+ int (*notify)(NotifierWithReturn *notifier, void *data);
+ QLIST_ENTRY(NotifierWithReturn) node;
+};
+
+typedef struct NotifierWithReturnList {
+ QLIST_HEAD(, NotifierWithReturn) notifiers;
+} NotifierWithReturnList;
+
+#define NOTIFIER_WITH_RETURN_LIST_INITIALIZER(head) \
+ { QLIST_HEAD_INITIALIZER((head).notifiers) }
+
+void notifier_with_return_list_init(NotifierWithReturnList *list);
+
+void notifier_with_return_list_add(NotifierWithReturnList *list,
+ NotifierWithReturn *notifier);
+
+void notifier_with_return_remove(NotifierWithReturn *notifier);
+
+int notifier_with_return_list_notify(NotifierWithReturnList *list,
+ void *data);
+
+#endif