qemu/include/qom/object_interfaces.h
Lin Ma d6edb15576 qom: Add can_be_deleted callback to UserCreatableClass
If backends implement the can_be_deleted and it returns false,
Then the qmp_object_del won't delete the given backends.

Signed-off-by: Lin Ma <lma@suse.com>
Message-Id: <1427704589-7688-2-git-send-email-lma@suse.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-04-01 10:06:38 +02:00

76 lines
2.4 KiB
C

#ifndef OBJECT_INTERFACES_H
#define OBJECT_INTERFACES_H
#include "qom/object.h"
#define TYPE_USER_CREATABLE "user-creatable"
#define USER_CREATABLE_CLASS(klass) \
OBJECT_CLASS_CHECK(UserCreatableClass, (klass), \
TYPE_USER_CREATABLE)
#define USER_CREATABLE_GET_CLASS(obj) \
OBJECT_GET_CLASS(UserCreatableClass, (obj), \
TYPE_USER_CREATABLE)
#define USER_CREATABLE(obj) \
INTERFACE_CHECK(UserCreatable, (obj), \
TYPE_USER_CREATABLE)
typedef struct UserCreatable {
/* <private> */
Object Parent;
} UserCreatable;
/**
* UserCreatableClass:
* @parent_class: the base class
* @complete: callback to be called after @obj's properties are set.
* @can_be_deleted: callback to be called before an object is removed
* to check if @obj can be removed safely.
*
* Interface is designed to work with -object/object-add/object_add
* commands.
* Interface is mandatory for objects that are designed to be user
* creatable (i.e. -object/object-add/object_add, will accept only
* objects that inherit this interface).
*
* Interface also provides an optional ability to do the second
* stage * initialization of the object after its properties were
* set.
*
* For objects created without using -object/object-add/object_add,
* @user_creatable_complete() wrapper should be called manually if
* object's type implements USER_CREATABLE interface and needs
* complete() callback to be called.
*/
typedef struct UserCreatableClass {
/* <private> */
InterfaceClass parent_class;
/* <public> */
void (*complete)(UserCreatable *uc, Error **errp);
bool (*can_be_deleted)(UserCreatable *uc, Error **errp);
} UserCreatableClass;
/**
* user_creatable_complete:
* @obj: the object whose complete() method is called if defined
* @errp: if an error occurs, a pointer to an area to store the error
*
* Wrapper to call complete() method if one of types it's inherited
* from implements USER_CREATABLE interface, otherwise the call does
* nothing.
*/
void user_creatable_complete(Object *obj, Error **errp);
/**
* user_creatable_can_be_deleted:
* @uc: the object whose can_be_deleted() method is called if implemented
* @errp: if an error occurs, a pointer to an area to store the error
*
* Wrapper to call can_be_deleted() method if one of types it's inherited
* from implements USER_CREATABLE interface.
*/
bool user_creatable_can_be_deleted(UserCreatable *uc, Error **errp);
#endif