qom: Drop convenience method object_property_get_uint16List()

qom/object.c provides object_property_get_TYPE() and
object_property_set_TYPE() for a number of common types.  These are
all convenience wrappers around object_property_get_qobject() and
object_property_set_qobject().

Except for object_property_get_uint16List(), which is unusual in two ways:

* It bypasses object_property_get_qobject().  Fixable; the previous
  commit did it for object_property_get_enum())

* It stores the value through a parameter.  Its contract claims it
  returns the value, like the other functions do.  Also fixable.

Fixing is not worthwhile, though: object_property_get_uint16List() has
seen exactly one user in six years.

Convert the lone user to do its job with the generic
object_property_get_qobject(), and drop object_property_get_uint16List().

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20200505152926.18877-6-armbru@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
[Commit message typo fixed]

hw/core/machine-qmp-cmds.c

@@ -11,9 +11,13 @@
 #include "cpu.h"
 #include "hw/boards.h"
 #include "qapi/error.h"
+#include "qapi/qapi-builtin-visit.h"
 #include "qapi/qapi-commands-machine.h"
 #include "qapi/qmp/qerror.h"
+#include "qapi/qmp/qobject.h"
+#include "qapi/qobject-input-visitor.h"
 #include "qemu/main-loop.h"
+#include "qom/qom-qobject.h"
 #include "sysemu/hostmem.h"
 #include "sysemu/hw_accel.h"
 #include "sysemu/numa.h"
@@ -303,6 +307,8 @@ static int query_memdev(Object *obj, void *opaque)
 {
     MemdevList **list = opaque;
     MemdevList *m = NULL;
+    QObject *host_nodes;
+    Visitor *v;
 
     if (object_dynamic_cast(obj, TYPE_MEMORY_BACKEND)) {
         m = g_malloc0(sizeof(*m));
@@ -325,9 +331,13 @@ static int query_memdev(Object *obj, void *opaque)
                                                     "policy",
                                                     "HostMemPolicy",
                                                     &error_abort);
-        object_property_get_uint16List(obj, "host-nodes",
-                                       &m->value->host_nodes,
-                                       &error_abort);
+        host_nodes = object_property_get_qobject(obj,
+                                                 "host-nodes",
+                                                 &error_abort);
+        v = qobject_input_visitor_new(host_nodes);
+        visit_type_uint16List(v, NULL, &m->value->host_nodes, &error_abort);
+        visit_free(v);
+        qobject_unref(host_nodes);
 
         m->next = *list;
         *list = m;

include/qom/object.h

@@ -1320,20 +1320,6 @@ uint64_t object_property_get_uint(Object *obj, const char *name,
 int object_property_get_enum(Object *obj, const char *name,
                              const char *typename, Error **errp);
 
-/**
- * object_property_get_uint16List:
- * @obj: the object
- * @name: the name of the property
- * @list: the returned int list
- * @errp: returns an error if this function fails
- *
- * Returns: the value of the property, converted to integers, or
- * undefined if an error occurs (including when the property value is not
- * an list of integers).
- */
-void object_property_get_uint16List(Object *obj, const char *name,
-                                    uint16List **list, Error **errp);
-
 /**
  * object_property_set:
  * @obj: the object

qom/object.c

@@ -1550,29 +1550,6 @@ int object_property_get_enum(Object *obj, const char *name,
     return ret;
 }
 
-void object_property_get_uint16List(Object *obj, const char *name,
-                                    uint16List **list, Error **errp)
-{
-    Error *err = NULL;
-    Visitor *v;
-    char *str;
-
-    v = string_output_visitor_new(false, &str);
-    object_property_get(obj, v, name, &err);
-    if (err) {
-        error_propagate(errp, err);
-        goto out;
-    }
-    visit_complete(v, &str);
-    visit_free(v);
-    v = string_input_visitor_new(str);
-    visit_type_uint16List(v, NULL, list, errp);
-
-    g_free(str);
-out:
-    visit_free(v);
-}
-
 void object_property_parse(Object *obj, const char *string,
                            const char *name, Error **errp)
 {