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qom: allow creating an alias of a child<> property 

Child properties must be unique.  Fix this problem by
turning their aliases into links.

The resolve function that forwards to the target property
does not have any knowledge of the target property's type,
so it works fine.

Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2014-06-10 11:17:35 +02:00
parent 64607d0881
commit d190698e6f
1 changed files with 11 additions and 1 deletions
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12
qom/object.c
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@ -1607,22 +1607,32 @@ void object_property_add_alias(Object *obj, const char *name,
AliasProperty *prop;
ObjectProperty *op;
ObjectProperty *target_prop;
gchar *prop_type;
target_prop = object_property_find(target_obj, target_name, errp);
if (!target_prop) {
return;
}
if (object_property_is_child(target_prop)) {
prop_type = g_strdup_printf("link%s",
target_prop->type + strlen("child"));
} else {
prop_type = g_strdup(target_prop->type);
}
prop = g_malloc(sizeof(*prop));
prop->target_obj = target_obj;
prop->target_name = target_name;
op = object_property_add(obj, name, target_prop->type,
op = object_property_add(obj, name, prop_type,
property_get_alias,
property_set_alias,
property_release_alias,
prop, errp);
op->resolve = property_resolve_alias;
g_free(prop_type);
}
static void object_instance_init(Object *obj)