[PATCH v2 47/58] qom: Make type checker functions accept const pointers

[Eduardo Habkost]

The existing type check macros all unconditionally drop const
qualifiers from their arguments.  Keep this behavior in the
macros generated by DECLARE_*CHECKER* by now.

Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
---
Changes v1 -> v2:
* Removed note about _Generic from commit message, because it
  won't be possible to do what I was planning without manual
  #defines
---
 include/qom/object.h | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/include/qom/object.h b/include/qom/object.h
index 4cd84998c2..1d6a520d35 100644
--- a/include/qom/object.h
+++ b/include/qom/object.h
@@ -567,7 +567,7 @@ struct Object
  */
 #define DECLARE_INSTANCE_CHECKER(InstanceType, OBJ_NAME, TYPENAME) \
     static inline G_GNUC_UNUSED InstanceType * \
-    OBJ_NAME(void *obj) \
+    OBJ_NAME(const void *obj) \
     { return OBJECT_CHECK(InstanceType, obj, TYPENAME); }
 
 /**
@@ -581,14 +581,16 @@ struct Object
  *
  * This macro will provide the three standard type cast functions for a
  * QOM type.
+ *
+ *FIXME: Use _Generic to make this const-safe
  */
 #define DECLARE_CLASS_CHECKERS(ClassType, OBJ_NAME, TYPENAME) \
     static inline G_GNUC_UNUSED ClassType * \
-    OBJ_NAME##_GET_CLASS(void *obj) \
+    OBJ_NAME##_GET_CLASS(const void *obj) \
     { return OBJECT_GET_CLASS(ClassType, obj, TYPENAME); } \
     \
     static inline G_GNUC_UNUSED ClassType * \
-    OBJ_NAME##_CLASS(void *klass) \
+    OBJ_NAME##_CLASS(const void *klass) \
     { return OBJECT_CLASS_CHECK(ClassType, klass, TYPENAME); }
 
 /**
-- 
2.26.2