From 793c96b5403233fd9935c94b2af6d557c297a088 Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Fri, 10 May 2013 14:16:37 +0200 Subject: qom: add a fast path to object_class_dynamic_cast For leaf classes, in many cases the callbacks will simply downcast the object back to the original class. Add this fast path to object_class_dynamic_cast, object_dynamic_cast will inherit it. Signed-off-by: Paolo Bonzini Message-id: 1368188203-3407-4-git-send-email-pbonzini@redhat.com Signed-off-by: Anthony Liguori --- qom/object.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'qom') diff --git a/qom/object.c b/qom/object.c index 35f4694987..0aa0c07d70 100644 --- a/qom/object.c +++ b/qom/object.c @@ -457,7 +457,12 @@ ObjectClass *object_class_dynamic_cast(ObjectClass *class, return NULL; } + /* A simple fast path that can trigger a lot for leaf classes. */ type = class->type; + if (type->name == typename) { + return class; + } + target_type = type_get_by_name(typename); if (!target_type) { /* target class type unknown, so fail the cast */ -- cgit v1.2.1