qom: Add TYPE_CONTAINER macro

Provide a macro for the container type across QEMU source tree, rather than
hard code it every time.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Message-ID: <20241121192202.4155849-2-peterx@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>

hw/arm/stellaris.c

@@ -1053,7 +1053,7 @@ static void stellaris_init(MachineState *ms, stellaris_board_info *board)
     flash_size = (((board->dc0 & 0xffff) + 1) << 1) * 1024;
     sram_size = ((board->dc0 >> 18) + 1) * 1024;
 
-    soc_container = object_new("container");
+    soc_container = object_new(TYPE_CONTAINER);
     object_property_add_child(OBJECT(ms), "soc", soc_container);
 
     /* Flash programming is done via the SCU, so pretend it is ROM.  */

include/qom/object.h

@@ -26,6 +26,7 @@ typedef struct InterfaceClass InterfaceClass;
 typedef struct InterfaceInfo InterfaceInfo;
 
 #define TYPE_OBJECT "object"
+#define TYPE_CONTAINER "container"
 
 typedef struct ObjectProperty ObjectProperty;
 

qom/container.c

@@ -15,7 +15,7 @@
 #include "qemu/module.h"
 
 static const TypeInfo container_info = {
-    .name          = "container",
+    .name          = TYPE_CONTAINER,
     .parent        = TYPE_OBJECT,
 };
 
@@ -37,7 +37,7 @@ Object *container_get(Object *root, const char *path)
     for (i = 1; parts[i] != NULL; i++, obj = child) {
         child = object_resolve_path_component(obj, parts[i]);
         if (!child) {
-            child = object_new("container");
+            child = object_new(TYPE_CONTAINER);
             object_property_add_child(obj, parts[i], child);
             object_unref(child);
         }

qom/object.c

@@ -1734,7 +1734,7 @@ Object *object_get_root(void)
     static Object *root;
 
     if (!root) {
-        root = object_new("container");
+        root = object_new(TYPE_CONTAINER);
     }
 
     return root;
@@ -1750,7 +1750,7 @@ Object *object_get_internal_root(void)
     static Object *internal_root;
 
     if (!internal_root) {
-        internal_root = object_new("container");
+        internal_root = object_new(TYPE_CONTAINER);
     }
 
     return internal_root;