qom: pass file/line/function to asserting casts

[qemu.git] / qom / object.c

diff --git a/qom/object.c b/qom/object.c
index 3b502554505c0f4672a81a874319856b54f8da41..bca6219a520029d0fa6786952fef5b3619403725 100644 (file)
--- a/qom/object.c
+++ b/qom/object.c
@@ -10,19 +10,20 @@
  * See the COPYING file in the top-level directory.
  */
 
-#include "qemu/object.h"
+#include "qom/object.h"
 #include "qemu-common.h"
-#include "qapi/qapi-visit-core.h"
+#include "qapi/visitor.h"
 #include "qapi/string-input-visitor.h"
 #include "qapi/string-output-visitor.h"
+#include "qapi/qmp/qerror.h"
 
 /* TODO: replace QObject with a simpler visitor to avoid a dependency
  * of the QOM core on QObject?  */
-#include "qemu/qom-qobject.h"
-#include "qobject.h"
-#include "qbool.h"
-#include "qint.h"
-#include "qstring.h"
+#include "qom/qom-qobject.h"
+#include "qapi/qmp/qobject.h"
+#include "qapi/qmp/qbool.h"
+#include "qapi/qmp/qint.h"
+#include "qapi/qmp/qstring.h"
 
 #define MAX_INTERFACES 32
 
@@ -244,6 +245,7 @@ static void type_initialize(TypeImpl *ti)
 
         g_assert(parent->class_size <= ti->class_size);
         memcpy(ti->class, parent->class, parent->class_size);
+        ti->class->interfaces = NULL;
 
         for (e = parent->class->interfaces; e; e = e->next) {
             ObjectClass *iface = e->data;
@@ -360,12 +362,18 @@ static void object_property_del_child(Object *obj, Object *child, Error **errp)
 
 void object_unparent(Object *obj)
 {
-    if (obj->parent) {
-        object_property_del_child(obj->parent, obj, NULL);
+    if (!obj->parent) {
+        return;
     }
+
+    object_ref(obj);
     if (obj->class->unparent) {
         (obj->class->unparent)(obj);
     }
+    if (obj->parent) {
+        object_property_del_child(obj->parent, obj, NULL);
+    }
+    object_unref(obj);
 }
 
 static void object_deinit(Object *obj, TypeImpl *type)
@@ -379,7 +387,7 @@ static void object_deinit(Object *obj, TypeImpl *type)
     }
 }
 
-void object_finalize(void *data)
+static void object_finalize(void *data)
 {
     Object *obj = data;
     TypeImpl *ti = obj->class->type;
@@ -414,13 +422,6 @@ Object *object_new(const char *typename)
     return object_new_with_type(ti);
 }
 
-void object_delete(Object *obj)
-{
-    object_unparent(obj);
-    g_assert(obj->ref == 1);
-    object_unref(obj);
-}
-
 Object *object_dynamic_cast(Object *obj, const char *typename)
 {
     if (obj && object_class_dynamic_cast(object_get_class(obj), typename)) {
@@ -430,15 +431,16 @@ Object *object_dynamic_cast(Object *obj, const char *typename)
     return NULL;
 }
 
-Object *object_dynamic_cast_assert(Object *obj, const char *typename)
+Object *object_dynamic_cast_assert(Object *obj, const char *typename,
+                                   const char *file, int line, const char *func)
 {
     Object *inst;
 
     inst = object_dynamic_cast(obj, typename);
 
     if (!inst && obj) {
-        fprintf(stderr, "Object %p is not an instance of type %s\n",
-                obj, typename);
+        fprintf(stderr, "%s:%d:%s: Object %p is not an instance of type %s\n",
+                file, line, func, obj, typename);
         abort();
     }
 
@@ -448,11 +450,28 @@ Object *object_dynamic_cast_assert(Object *obj, const char *typename)
 ObjectClass *object_class_dynamic_cast(ObjectClass *class,
                                        const char *typename)
 {
-    TypeImpl *target_type = type_get_by_name(typename);
-    TypeImpl *type = class->type;
     ObjectClass *ret = NULL;
+    TypeImpl *target_type;
+    TypeImpl *type;
+
+    if (!class) {
+        return NULL;
+    }
+
+    /* A simple fast path that can trigger a lot for leaf classes.  */
+    type = class->type;
+    if (type->name == typename) {
+        return class;
+    }
 
-    if (type->num_interfaces && type_is_ancestor(target_type, type_interface)) {
+    target_type = type_get_by_name(typename);
+    if (!target_type) {
+        /* target class type unknown, so fail the cast */
+        return NULL;
+    }
+
+    if (type->class->interfaces &&
+            type_is_ancestor(target_type, type_interface)) {
         int found = 0;
         GSList *i;
 
@@ -477,13 +496,15 @@ ObjectClass *object_class_dynamic_cast(ObjectClass *class,
 }
 
 ObjectClass *object_class_dynamic_cast_assert(ObjectClass *class,
-                                              const char *typename)
+                                              const char *typename,
+                                              const char *file, int line,
+                                              const char *func)
 {
     ObjectClass *ret = object_class_dynamic_cast(class, typename);
 
-    if (!ret) {
-        fprintf(stderr, "Object %p is not an instance of type %s\n",
-                class, typename);
+    if (!ret && class) {
+        fprintf(stderr, "%s:%d:%s: Object %p is not an instance of type %s\n",
+                file, line, func, class, typename);
         abort();
     }
 
@@ -500,6 +521,11 @@ ObjectClass *object_get_class(Object *obj)
     return obj->class;
 }
 
+bool object_class_is_abstract(ObjectClass *klass)
+{
+    return klass->type->abstract;
+}
+
 const char *object_class_get_name(ObjectClass *klass)
 {
     return klass->type->name;
@@ -626,7 +652,18 @@ void object_property_add(Object *obj, const char *name, const char *type,
                          ObjectPropertyRelease *release,
                          void *opaque, Error **errp)
 {
-    ObjectProperty *prop = g_malloc0(sizeof(*prop));
+    ObjectProperty *prop;
+
+    QTAILQ_FOREACH(prop, &obj->properties, node) {
+        if (strcmp(prop->name, name) == 0) {
+            error_setg(errp, "attempt to add duplicate property '%s'"
+                       " to object (type '%s')", name,
+                       object_get_typename(obj));
+            return;
+        }
+    }
+
+    prop = g_malloc0(sizeof(*prop));
 
     prop->name = g_strdup(name);
     prop->type = g_strdup(type);
@@ -1016,7 +1053,7 @@ gchar *object_get_canonical_path(Object *obj)
     return newpath;
 }
 
-Object *object_resolve_path_component(Object *parent, gchar *part)
+Object *object_resolve_path_component(Object *parent, const gchar *part)
 {
     ObjectProperty *prop = object_property_find(parent, part, NULL);
     if (prop == NULL) {
@@ -1095,21 +1132,13 @@ static Object *object_resolve_partial_path(Object *parent,
 Object *object_resolve_path_type(const char *path, const char *typename,
                                  bool *ambiguous)
 {
-    bool partial_path = true;
     Object *obj;
     gchar **parts;
 
     parts = g_strsplit(path, "/", 0);
-    if (parts == NULL || parts[0] == NULL) {
-        g_strfreev(parts);
-        return object_get_root();
-    }
-
-    if (strcmp(parts[0], "") == 0) {
-        partial_path = false;
-    }
+    assert(parts);
 
-    if (partial_path) {
+    if (parts[0] == NULL || strcmp(parts[0], "") != 0) {
         if (ambiguous) {
             *ambiguous = false;
         }