From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:40336) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TBLGZ-00063s-O3 for qemu-devel@nongnu.org; Tue, 11 Sep 2012 03:52:19 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1TBLGY-0007HR-I6 for qemu-devel@nongnu.org; Tue, 11 Sep 2012 03:52:15 -0400 Received: from mail-ob0-f173.google.com ([209.85.214.173]:38954) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TBLGY-0007Gb-5G for qemu-devel@nongnu.org; Tue, 11 Sep 2012 03:52:14 -0400 Received: by mail-ob0-f173.google.com with SMTP id ta14so286204obb.4 for ; Tue, 11 Sep 2012 00:52:13 -0700 (PDT) From: Liu Ping Fan Date: Tue, 11 Sep 2012 15:51:43 +0800 Message-Id: <1347349912-15611-3-git-send-email-qemulist@gmail.com> In-Reply-To: <1347349912-15611-1-git-send-email-qemulist@gmail.com> References: <1347349912-15611-1-git-send-email-qemulist@gmail.com> Subject: [Qemu-devel] [PATCH V3 02/11] qom: apply atomic on object's refcount List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Jan Kiszka , Marcelo Tosatti , Avi Kivity , Anthony Liguori , Paolo Bonzini From: Liu Ping Fan Signed-off-by: Liu Ping Fan --- include/qemu/object.h | 3 ++- qom/object.c | 11 +++++------ 2 files changed, 7 insertions(+), 7 deletions(-) diff --git a/include/qemu/object.h b/include/qemu/object.h index cc75fee..0c02614 100644 --- a/include/qemu/object.h +++ b/include/qemu/object.h @@ -18,6 +18,7 @@ #include #include #include "qemu-queue.h" +#include "qemu/atomic.h" struct Visitor; struct Error; @@ -262,7 +263,7 @@ struct Object /*< private >*/ ObjectClass *class; QTAILQ_HEAD(, ObjectProperty) properties; - uint32_t ref; + Atomic ref; Object *parent; }; diff --git a/qom/object.c b/qom/object.c index e3e9242..34ec2a1 100644 --- a/qom/object.c +++ b/qom/object.c @@ -383,7 +383,7 @@ void object_finalize(void *data) object_deinit(obj, ti); object_property_del_all(obj); - g_assert(obj->ref == 0); + g_assert(atomic_read(&obj->ref) == 0); } Object *object_new_with_type(Type type) @@ -410,7 +410,7 @@ Object *object_new(const char *typename) void object_delete(Object *obj) { object_unparent(obj); - g_assert(obj->ref == 1); + g_assert(atomic_read(&obj->ref) == 1); object_unref(obj); g_free(obj); } @@ -600,16 +600,15 @@ GSList *object_class_get_list(const char *implements_type, void object_ref(Object *obj) { - obj->ref++; + atomic_inc(&obj->ref); } void object_unref(Object *obj) { - g_assert(obj->ref > 0); - obj->ref--; + g_assert(atomic_read(&obj->ref) > 0); /* parent always holds a reference to its children */ - if (obj->ref == 0) { + if (atomic_return_and_sub(1, &obj->ref) == 1) { object_finalize(obj); } } -- 1.7.4.4