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[Qemu-devel] [PATCH RFC 1/3] qom: Add "realized" property to Object
From: |
Andreas Färber |
Subject: |
[Qemu-devel] [PATCH RFC 1/3] qom: Add "realized" property to Object |
Date: |
Mon, 26 Mar 2012 15:46:50 +0200 |
The Object::realized property can only be set once and, on setting it,
invokes the ObjectClass::realize callback.
Signed-off-by: Andreas Färber <address@hidden>
Cc: Anthony Liguori <address@hidden>
Cc: Paolo Bonzini <address@hidden>
---
include/qemu/object.h | 2 ++
qom/object.c | 31 +++++++++++++++++++++++++++++++
2 files changed, 33 insertions(+), 0 deletions(-)
diff --git a/include/qemu/object.h b/include/qemu/object.h
index e8fc126..742b5b6 100644
--- a/include/qemu/object.h
+++ b/include/qemu/object.h
@@ -239,6 +239,7 @@ struct ObjectClass
{
/*< private >*/
Type type;
+ int (*realize)(Object *obj);
};
/**
@@ -264,6 +265,7 @@ struct Object
QTAILQ_HEAD(, ObjectProperty) properties;
uint32_t ref;
Object *parent;
+ bool realized;
};
/**
diff --git a/qom/object.c b/qom/object.c
index 9cd9506..ec143ad 100644
--- a/qom/object.c
+++ b/qom/object.c
@@ -273,6 +273,34 @@ static void object_init_with_type(Object *obj, TypeImpl
*ti)
}
}
+static void object_get_realized(Object *obj, Visitor *v, void *opaque,
+ const char *name, Error **errp)
+{
+ visit_type_bool(v, &obj->realized, name, errp);
+}
+
+static void object_set_realized(Object *obj, Visitor *v, void *opaque,
+ const char *name, Error **errp)
+{
+ bool value;
+
+ if (obj->realized) {
+ error_set(errp, QERR_PERMISSION_DENIED);
+ return;
+ }
+
+ visit_type_bool(v, &value, name, errp);
+ if (error_is_set(errp) || !value) {
+ return;
+ }
+
+ if (obj->class->realize != NULL && obj->class->realize(obj) != 0) {
+ error_set(errp, QERR_DEVICE_INIT_FAILED, object_get_typename(obj));
+ return;
+ }
+ obj->realized = true;
+}
+
void object_initialize_with_type(void *data, TypeImpl *type)
{
Object *obj = data;
@@ -287,6 +315,9 @@ void object_initialize_with_type(void *data, TypeImpl *type)
obj->class = type->class;
QTAILQ_INIT(&obj->properties);
object_init_with_type(obj, type);
+ object_property_add(obj, "realized", "boolean",
+ object_get_realized, object_set_realized,
+ NULL, NULL, NULL);
}
void object_initialize(void *data, const char *typename)
--
1.7.7