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qemu/include/qom/object.h
Paolo Bonzini 845b54efaf qom: remove unused function 
The function has been unused since commit 4fa28f2390 ("ppc/pnv:
Instantiate cores separately", 2019-12-17).  The idea was that
you could use it to build an array of objects via pointer
arithmetic, but no one is doing it anymore.

Cc: Dr. David Alan Gilbert <dave@treblig.org>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-10-31 18:28:32 +01:00

2051 lines
72 KiB
C
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/*
* QEMU Object Model
*
* Copyright IBM, Corp. 2011
*
* Authors:
* Anthony Liguori <aliguori@us.ibm.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*
*/
#ifndef QEMU_OBJECT_H
#define QEMU_OBJECT_H
#include "qapi/qapi-builtin-types.h"
#include "qemu/module.h"
struct TypeImpl;
typedef struct TypeImpl *Type;
typedef struct TypeInfo TypeInfo;
typedef struct InterfaceClass InterfaceClass;
typedef struct InterfaceInfo InterfaceInfo;
#define TYPE_OBJECT "object"
typedef struct ObjectProperty ObjectProperty;
/**
* typedef ObjectPropertyAccessor:
* @obj: the object that owns the property
* @v: the visitor that contains the property data
* @name: the name of the property
* @opaque: the object property opaque
* @errp: a pointer to an Error that is filled if getting/setting fails.
*
* Called when trying to get/set a property.
*/
typedef void (ObjectPropertyAccessor)(Object *obj,
Visitor *v,
const char *name,
void *opaque,
Error **errp);
/**
* typedef ObjectPropertyResolve:
* @obj: the object that owns the property
* @opaque: the opaque registered with the property
* @part: the name of the property
*
* Resolves the #Object corresponding to property @part.
*
* The returned object can also be used as a starting point
* to resolve a relative path starting with "@part".
*
* Returns: If @path is the path that led to @obj, the function
* returns the #Object corresponding to "@path/@part".
* If "@path/@part" is not a valid object path, it returns #NULL.
*/
typedef Object *(ObjectPropertyResolve)(Object *obj,
void *opaque,
const char *part);
/**
* typedef ObjectPropertyRelease:
* @obj: the object that owns the property
* @name: the name of the property
* @opaque: the opaque registered with the property
*
* Called when a property is removed from a object.
*/
typedef void (ObjectPropertyRelease)(Object *obj,
const char *name,
void *opaque);
/**
* typedef ObjectPropertyInit:
* @obj: the object that owns the property
* @prop: the property to set
*
* Called when a property is initialized.
*/
typedef void (ObjectPropertyInit)(Object *obj, ObjectProperty *prop);
struct ObjectProperty
{
char *name;
char *type;
char *description;
ObjectPropertyAccessor *get;
ObjectPropertyAccessor *set;
ObjectPropertyResolve *resolve;
ObjectPropertyRelease *release;
ObjectPropertyInit *init;
void *opaque;
QObject *defval;
};
/**
* typedef ObjectUnparent:
* @obj: the object that is being removed from the composition tree
*
* Called when an object is being removed from the QOM composition tree.
* The function should remove any backlinks from children objects to @obj.
*/
typedef void (ObjectUnparent)(Object *obj);
/**
* typedef ObjectFree:
* @obj: the object being freed
*
* Called when an object's last reference is removed.
*/
typedef void (ObjectFree)(void *obj);
#define OBJECT_CLASS_CAST_CACHE 4
/**
* struct ObjectClass:
*
* The base for all classes. The only thing that #ObjectClass contains is an
* integer type handle.
*/
struct ObjectClass
{
/* private: */
Type type;
GSList *interfaces;
const char *object_cast_cache[OBJECT_CLASS_CAST_CACHE];
const char *class_cast_cache[OBJECT_CLASS_CAST_CACHE];
ObjectUnparent *unparent;
GHashTable *properties;
};
/**
* struct Object:
*
* The base for all objects. The first member of this object is a pointer to
* a #ObjectClass. Since C guarantees that the first member of a structure
* always begins at byte 0 of that structure, as long as any sub-object places
* its parent as the first member, we can cast directly to a #Object.
*
* As a result, #Object contains a reference to the objects type as its
* first member. This allows identification of the real type of the object at
* run time.
*/
struct Object
{
/* private: */
ObjectClass *class;
ObjectFree *free;
GHashTable *properties;
uint32_t ref;
Object *parent;
};
/**
* DECLARE_INSTANCE_CHECKER:
* @InstanceType: instance struct name
* @OBJ_NAME: the object name in uppercase with underscore separators
* @TYPENAME: type name
*
* Direct usage of this macro should be avoided, and the complete
* OBJECT_DECLARE_TYPE macro is recommended instead.
*
* This macro will provide the instance type cast functions for a
* QOM type.
*/
#define DECLARE_INSTANCE_CHECKER(InstanceType, OBJ_NAME, TYPENAME) \
static inline G_GNUC_UNUSED InstanceType * \
OBJ_NAME(const void *obj) \
{ return OBJECT_CHECK(InstanceType, obj, TYPENAME); }
/**
* DECLARE_CLASS_CHECKERS:
* @ClassType: class struct name
* @OBJ_NAME: the object name in uppercase with underscore separators
* @TYPENAME: type name
*
* Direct usage of this macro should be avoided, and the complete
* OBJECT_DECLARE_TYPE macro is recommended instead.
*
* This macro will provide the class type cast functions for a
* QOM type.
*/
#define DECLARE_CLASS_CHECKERS(ClassType, OBJ_NAME, TYPENAME) \
static inline G_GNUC_UNUSED ClassType * \
OBJ_NAME##_GET_CLASS(const void *obj) \
{ return OBJECT_GET_CLASS(ClassType, obj, TYPENAME); } \
\
static inline G_GNUC_UNUSED ClassType * \
OBJ_NAME##_CLASS(const void *klass) \
{ return OBJECT_CLASS_CHECK(ClassType, klass, TYPENAME); }
/**
* DECLARE_OBJ_CHECKERS:
* @InstanceType: instance struct name
* @ClassType: class struct name
* @OBJ_NAME: the object name in uppercase with underscore separators
* @TYPENAME: type name
*
* Direct usage of this macro should be avoided, and the complete
* OBJECT_DECLARE_TYPE macro is recommended instead.
*
* This macro will provide the three standard type cast functions for a
* QOM type.
*/
#define DECLARE_OBJ_CHECKERS(InstanceType, ClassType, OBJ_NAME, TYPENAME) \
DECLARE_INSTANCE_CHECKER(InstanceType, OBJ_NAME, TYPENAME) \
\
DECLARE_CLASS_CHECKERS(ClassType, OBJ_NAME, TYPENAME)
/**
* OBJECT_DECLARE_TYPE:
* @InstanceType: instance struct name
* @ClassType: class struct name
* @MODULE_OBJ_NAME: the object name in uppercase with underscore separators
*
* This macro is typically used in a header file, and will:
*
* - create the typedefs for the object and class structs
* - register the type for use with g_autoptr
* - provide three standard type cast functions
*
* The object struct and class struct need to be declared manually.
*/
#define OBJECT_DECLARE_TYPE(InstanceType, ClassType, MODULE_OBJ_NAME) \
typedef struct InstanceType InstanceType; \
typedef struct ClassType ClassType; \
\
G_DEFINE_AUTOPTR_CLEANUP_FUNC(InstanceType, object_unref) \
\
DECLARE_OBJ_CHECKERS(InstanceType, ClassType, \
MODULE_OBJ_NAME, TYPE_##MODULE_OBJ_NAME)
/**
* OBJECT_DECLARE_SIMPLE_TYPE:
* @InstanceType: instance struct name
* @MODULE_OBJ_NAME: the object name in uppercase with underscore separators
*
* This does the same as OBJECT_DECLARE_TYPE(), but with no class struct
* declared.
*
* This macro should be used unless the class struct needs to have
* virtual methods declared.
*/
#define OBJECT_DECLARE_SIMPLE_TYPE(InstanceType, MODULE_OBJ_NAME) \
typedef struct InstanceType InstanceType; \
\
G_DEFINE_AUTOPTR_CLEANUP_FUNC(InstanceType, object_unref) \
\
DECLARE_INSTANCE_CHECKER(InstanceType, MODULE_OBJ_NAME, TYPE_##MODULE_OBJ_NAME)
/**
* DO_OBJECT_DEFINE_TYPE_EXTENDED:
* @ModuleObjName: the object name with initial caps
* @module_obj_name: the object name in lowercase with underscore separators
* @MODULE_OBJ_NAME: the object name in uppercase with underscore separators
* @PARENT_MODULE_OBJ_NAME: the parent object name in uppercase with underscore
* separators
* @ABSTRACT: boolean flag to indicate whether the object can be instantiated
* @CLASS_SIZE: size of the type's class
* @...: list of initializers for "InterfaceInfo" to declare implemented interfaces
*
* This is the base macro used to implement all the OBJECT_DEFINE_*
* macros. It should never be used directly in a source file.
*/
#define DO_OBJECT_DEFINE_TYPE_EXTENDED(ModuleObjName, module_obj_name, \
MODULE_OBJ_NAME, \
PARENT_MODULE_OBJ_NAME, \
ABSTRACT, CLASS_SIZE, ...) \
static void \
module_obj_name##_finalize(Object *obj); \
static void \
module_obj_name##_class_init(ObjectClass *oc, void *data); \
static void \
module_obj_name##_init(Object *obj); \
\
static const TypeInfo module_obj_name##_info = { \
.parent = TYPE_##PARENT_MODULE_OBJ_NAME, \
.name = TYPE_##MODULE_OBJ_NAME, \
.instance_size = sizeof(ModuleObjName), \
.instance_align = __alignof__(ModuleObjName), \
.instance_init = module_obj_name##_init, \
.instance_finalize = module_obj_name##_finalize, \
.class_size = CLASS_SIZE, \
.class_init = module_obj_name##_class_init, \
.abstract = ABSTRACT, \
.interfaces = (InterfaceInfo[]) { __VA_ARGS__ } , \
}; \
\
static void \
module_obj_name##_register_types(void) \
{ \
type_register_static(&module_obj_name##_info); \
} \
type_init(module_obj_name##_register_types);
/**
* OBJECT_DEFINE_TYPE_EXTENDED:
* @ModuleObjName: the object name with initial caps
* @module_obj_name: the object name in lowercase with underscore separators
* @MODULE_OBJ_NAME: the object name in uppercase with underscore separators
* @PARENT_MODULE_OBJ_NAME: the parent object name in uppercase with underscore
* separators
* @ABSTRACT: boolean flag to indicate whether the object can be instantiated
* @...: list of initializers for "InterfaceInfo" to declare implemented interfaces
*
* This macro is typically used in a source file, and will:
*
* - declare prototypes for _finalize, _class_init and _init methods
* - declare the TypeInfo struct instance
* - provide the constructor to register the type
*
* After using this macro, implementations of the _finalize, _class_init,
* and _init methods need to be written. Any of these can be zero-line
* no-op impls if no special logic is required for a given type.
*
* This macro should rarely be used, instead one of the more specialized
* macros is usually a better choice.
*/
#define OBJECT_DEFINE_TYPE_EXTENDED(ModuleObjName, module_obj_name, \
MODULE_OBJ_NAME, PARENT_MODULE_OBJ_NAME, \
ABSTRACT, ...) \
DO_OBJECT_DEFINE_TYPE_EXTENDED(ModuleObjName, module_obj_name, \
MODULE_OBJ_NAME, PARENT_MODULE_OBJ_NAME, \
ABSTRACT, sizeof(ModuleObjName##Class), \
__VA_ARGS__)
/**
* OBJECT_DEFINE_TYPE:
* @ModuleObjName: the object name with initial caps
* @module_obj_name: the object name in lowercase with underscore separators
* @MODULE_OBJ_NAME: the object name in uppercase with underscore separators
* @PARENT_MODULE_OBJ_NAME: the parent object name in uppercase with underscore
* separators
*
* This is a specialization of OBJECT_DEFINE_TYPE_EXTENDED, which is suitable
* for the common case of a non-abstract type, without any interfaces.
*/
#define OBJECT_DEFINE_TYPE(ModuleObjName, module_obj_name, MODULE_OBJ_NAME, \
PARENT_MODULE_OBJ_NAME) \
OBJECT_DEFINE_TYPE_EXTENDED(ModuleObjName, module_obj_name, \
MODULE_OBJ_NAME, PARENT_MODULE_OBJ_NAME, \
false, { NULL })
/**
* OBJECT_DEFINE_TYPE_WITH_INTERFACES:
* @ModuleObjName: the object name with initial caps
* @module_obj_name: the object name in lowercase with underscore separators
* @MODULE_OBJ_NAME: the object name in uppercase with underscore separators
* @PARENT_MODULE_OBJ_NAME: the parent object name in uppercase with underscore
* separators
* @...: list of initializers for "InterfaceInfo" to declare implemented interfaces
*
* This is a specialization of OBJECT_DEFINE_TYPE_EXTENDED, which is suitable
* for the common case of a non-abstract type, with one or more implemented
* interfaces.
*
* Note when passing the list of interfaces, be sure to include the final
* NULL entry, e.g. { TYPE_USER_CREATABLE }, { NULL }
*/
#define OBJECT_DEFINE_TYPE_WITH_INTERFACES(ModuleObjName, module_obj_name, \
MODULE_OBJ_NAME, \
PARENT_MODULE_OBJ_NAME, ...) \
OBJECT_DEFINE_TYPE_EXTENDED(ModuleObjName, module_obj_name, \
MODULE_OBJ_NAME, PARENT_MODULE_OBJ_NAME, \
false, __VA_ARGS__)
/**
* OBJECT_DEFINE_ABSTRACT_TYPE:
* @ModuleObjName: the object name with initial caps
* @module_obj_name: the object name in lowercase with underscore separators
* @MODULE_OBJ_NAME: the object name in uppercase with underscore separators
* @PARENT_MODULE_OBJ_NAME: the parent object name in uppercase with underscore
* separators
*
* This is a specialization of OBJECT_DEFINE_TYPE_EXTENDED, which is suitable
* for defining an abstract type, without any interfaces.
*/
#define OBJECT_DEFINE_ABSTRACT_TYPE(ModuleObjName, module_obj_name, \
MODULE_OBJ_NAME, PARENT_MODULE_OBJ_NAME) \
OBJECT_DEFINE_TYPE_EXTENDED(ModuleObjName, module_obj_name, \
MODULE_OBJ_NAME, PARENT_MODULE_OBJ_NAME, \
true, { NULL })
/**
* OBJECT_DEFINE_SIMPLE_TYPE_WITH_INTERFACES:
* @ModuleObjName: the object name with initial caps
* @module_obj_name: the object name in lowercase with underscore separators
* @MODULE_OBJ_NAME: the object name in uppercase with underscore separators
* @PARENT_MODULE_OBJ_NAME: the parent object name in uppercase with underscore
* separators
*
* This is a variant of OBJECT_DEFINE_TYPE_EXTENDED, which is suitable for
* the case of a non-abstract type, with interfaces, and with no requirement
* for a class struct.
*/
#define OBJECT_DEFINE_SIMPLE_TYPE_WITH_INTERFACES(ModuleObjName, \
module_obj_name, \
MODULE_OBJ_NAME, \
PARENT_MODULE_OBJ_NAME, ...) \
DO_OBJECT_DEFINE_TYPE_EXTENDED(ModuleObjName, module_obj_name, \
MODULE_OBJ_NAME, PARENT_MODULE_OBJ_NAME, \
false, 0, __VA_ARGS__)
/**
* OBJECT_DEFINE_SIMPLE_TYPE:
* @ModuleObjName: the object name with initial caps
* @module_obj_name: the object name in lowercase with underscore separators
* @MODULE_OBJ_NAME: the object name in uppercase with underscore separators
* @PARENT_MODULE_OBJ_NAME: the parent object name in uppercase with underscore
* separators
*
* This is a variant of OBJECT_DEFINE_TYPE_EXTENDED, which is suitable for
* the common case of a non-abstract type, without any interfaces, and with
* no requirement for a class struct. If you declared your type with
* OBJECT_DECLARE_SIMPLE_TYPE then this is probably the right choice for
* defining it.
*/
#define OBJECT_DEFINE_SIMPLE_TYPE(ModuleObjName, module_obj_name, \
MODULE_OBJ_NAME, PARENT_MODULE_OBJ_NAME) \
OBJECT_DEFINE_SIMPLE_TYPE_WITH_INTERFACES(ModuleObjName, module_obj_name, \
MODULE_OBJ_NAME, PARENT_MODULE_OBJ_NAME, { NULL })
/**
* struct TypeInfo:
* @name: The name of the type.
* @parent: The name of the parent type.
* @instance_size: The size of the object (derivative of #Object). If
* @instance_size is 0, then the size of the object will be the size of the
* parent object.
* @instance_align: The required alignment of the object. If @instance_align
* is 0, then normal malloc alignment is sufficient; if non-zero, then we
* must use qemu_memalign for allocation.
* @instance_init: This function is called to initialize an object. The parent
* class will have already been initialized so the type is only responsible
* for initializing its own members.
* @instance_post_init: This function is called to finish initialization of
* an object, after all @instance_init functions were called.
* @instance_finalize: This function is called during object destruction. This
* is called before the parent @instance_finalize function has been called.
* An object should only free the members that are unique to its type in this
* function.
* @abstract: If this field is true, then the class is considered abstract and
* cannot be directly instantiated.
* @class_size: The size of the class object (derivative of #ObjectClass)
* for this object. If @class_size is 0, then the size of the class will be
* assumed to be the size of the parent class. This allows a type to avoid
* implementing an explicit class type if they are not adding additional
* virtual functions.
* @class_init: This function is called after all parent class initialization
* has occurred to allow a class to set its default virtual method pointers.
* This is also the function to use to override virtual methods from a parent
* class.
* @class_base_init: This function is called for all base classes after all
* parent class initialization has occurred, but before the class itself
* is initialized. This is the function to use to undo the effects of
* memcpy from the parent class to the descendants.
* @class_data: Data to pass to the @class_init,
* @class_base_init. This can be useful when building dynamic
* classes.
* @interfaces: The list of interfaces associated with this type. This
* should point to a static array that's terminated with a zero filled
* element.
*/
struct TypeInfo
{
const char *name;
const char *parent;
size_t instance_size;
size_t instance_align;
void (*instance_init)(Object *obj);
void (*instance_post_init)(Object *obj);
void (*instance_finalize)(Object *obj);
bool abstract;
size_t class_size;
void (*class_init)(ObjectClass *klass, void *data);
void (*class_base_init)(ObjectClass *klass, void *data);
void *class_data;
InterfaceInfo *interfaces;
};
/**
* OBJECT:
* @obj: A derivative of #Object
*
* Converts an object to a #Object. Since all objects are #Objects,
* this function will always succeed.
*/
#define OBJECT(obj) \
((Object *)(obj))
/**
* OBJECT_CLASS:
* @class: A derivative of #ObjectClass.
*
* Converts a class to an #ObjectClass. Since all objects are #Objects,
* this function will always succeed.
*/
#define OBJECT_CLASS(class) \
((ObjectClass *)(class))
/**
* OBJECT_CHECK:
* @type: The C type to use for the return value.
* @obj: A derivative of @type to cast.
* @name: The QOM typename of @type
*
* A type safe version of @object_dynamic_cast_assert. Typically each class
* will define a macro based on this type to perform type safe dynamic_casts to
* this object type.
*
* If an invalid object is passed to this function, a run time assert will be
* generated.
*/
#define OBJECT_CHECK(type, obj, name) \
((type *)object_dynamic_cast_assert(OBJECT(obj), (name), \
__FILE__, __LINE__, __func__))
/**
* OBJECT_CLASS_CHECK:
* @class_type: The C type to use for the return value.
* @class: A derivative class of @class_type to cast.
* @name: the QOM typename of @class_type.
*
* A type safe version of @object_class_dynamic_cast_assert. This macro is
* typically wrapped by each type to perform type safe casts of a class to a
* specific class type.
*/
#define OBJECT_CLASS_CHECK(class_type, class, name) \
((class_type *)object_class_dynamic_cast_assert(OBJECT_CLASS(class), (name), \
__FILE__, __LINE__, __func__))
/**
* OBJECT_GET_CLASS:
* @class: The C type to use for the return value.
* @obj: The object to obtain the class for.
* @name: The QOM typename of @obj.
*
* This function will return a specific class for a given object. Its generally
* used by each type to provide a type safe macro to get a specific class type
* from an object.
*/
#define OBJECT_GET_CLASS(class, obj, name) \
OBJECT_CLASS_CHECK(class, object_get_class(OBJECT(obj)), name)
/**
* struct InterfaceInfo:
* @type: The name of the interface.
*
* The information associated with an interface.
*/
struct InterfaceInfo {
const char *type;
};
/**
* struct InterfaceClass:
* @parent_class: the base class
*
* The class for all interfaces. Subclasses of this class should only add
* virtual methods.
*/
struct InterfaceClass
{
ObjectClass parent_class;
/* private: */
ObjectClass *concrete_class;
Type interface_type;
};
#define TYPE_INTERFACE "interface"
/**
* INTERFACE_CLASS:
* @klass: class to cast from
* Returns: An #InterfaceClass or raise an error if cast is invalid
*/
#define INTERFACE_CLASS(klass) \
OBJECT_CLASS_CHECK(InterfaceClass, klass, TYPE_INTERFACE)
/**
* INTERFACE_CHECK:
* @interface: the type to return
* @obj: the object to convert to an interface
* @name: the interface type name
*
* Returns: @obj casted to @interface if cast is valid, otherwise raise error.
*/
#define INTERFACE_CHECK(interface, obj, name) \
((interface *)object_dynamic_cast_assert(OBJECT((obj)), (name), \
__FILE__, __LINE__, __func__))
/**
* object_new_with_class:
* @klass: The class to instantiate.
*
* This function will initialize a new object using heap allocated memory.
* The returned object has a reference count of 1, and will be freed when
* the last reference is dropped.
*
* Returns: The newly allocated and instantiated object.
*/
Object *object_new_with_class(ObjectClass *klass);
/**
* object_new:
* @typename: The name of the type of the object to instantiate.
*
* This function will initialize a new object using heap allocated memory.
* The returned object has a reference count of 1, and will be freed when
* the last reference is dropped.
*
* Returns: The newly allocated and instantiated object.
*/
Object *object_new(const char *typename);
/**
* object_new_with_props:
* @typename: The name of the type of the object to instantiate.
* @parent: the parent object
* @id: The unique ID of the object
* @errp: pointer to error object
* @...: list of property names and values
*
* This function will initialize a new object using heap allocated memory.
* The returned object has a reference count of 1, and will be freed when
* the last reference is dropped.
*
* The @id parameter will be used when registering the object as a
* child of @parent in the composition tree.
*
* The variadic parameters are a list of pairs of (propname, propvalue)
* strings. The propname of %NULL indicates the end of the property
* list. If the object implements the user creatable interface, the
* object will be marked complete once all the properties have been
* processed.
*
* .. code-block:: c
* :caption: Creating an object with properties
*
* Error *err = NULL;
* Object *obj;
*
* obj = object_new_with_props(TYPE_MEMORY_BACKEND_FILE,
* object_get_objects_root(),
* "hostmem0",
* &err,
* "share", "yes",
* "mem-path", "/dev/shm/somefile",
* "prealloc", "yes",
* "size", "1048576",
* NULL);
*
* if (!obj) {
* error_reportf_err(err, "Cannot create memory backend: ");
* }
*
* The returned object will have one stable reference maintained
* for as long as it is present in the object hierarchy.
*
* Returns: The newly allocated, instantiated & initialized object.
*/
Object *object_new_with_props(const char *typename,
Object *parent,
const char *id,
Error **errp,
...) G_GNUC_NULL_TERMINATED;
/**
* object_new_with_propv:
* @typename: The name of the type of the object to instantiate.
* @parent: the parent object
* @id: The unique ID of the object
* @errp: pointer to error object
* @vargs: list of property names and values
*
* See object_new_with_props() for documentation.
*/
Object *object_new_with_propv(const char *typename,
Object *parent,
const char *id,
Error **errp,
va_list vargs);
bool object_apply_global_props(Object *obj, const GPtrArray *props,
Error **errp);
void object_set_machine_compat_props(GPtrArray *compat_props);
void object_set_accelerator_compat_props(GPtrArray *compat_props);
void object_register_sugar_prop(const char *driver, const char *prop,
const char *value, bool optional);
void object_apply_compat_props(Object *obj);
/**
* object_set_props:
* @obj: the object instance to set properties on
* @errp: pointer to error object
* @...: list of property names and values
*
* This function will set a list of properties on an existing object
* instance.
*
* The variadic parameters are a list of pairs of (propname, propvalue)
* strings. The propname of %NULL indicates the end of the property
* list.
*
* .. code-block:: c
* :caption: Update an object's properties
*
* Error *err = NULL;
* Object *obj = ...get / create object...;
*
* if (!object_set_props(obj,
* &err,
* "share", "yes",
* "mem-path", "/dev/shm/somefile",
* "prealloc", "yes",
* "size", "1048576",
* NULL)) {
* error_reportf_err(err, "Cannot set properties: ");
* }
*
* The returned object will have one stable reference maintained
* for as long as it is present in the object hierarchy.
*
* Returns: %true on success, %false on error.
*/
bool object_set_props(Object *obj, Error **errp, ...) G_GNUC_NULL_TERMINATED;
/**
* object_set_propv:
* @obj: the object instance to set properties on
* @errp: pointer to error object
* @vargs: list of property names and values
*
* See object_set_props() for documentation.
*
* Returns: %true on success, %false on error.
*/
bool object_set_propv(Object *obj, Error **errp, va_list vargs);
/**
* object_initialize:
* @obj: A pointer to the memory to be used for the object.
* @size: The maximum size available at @obj for the object.
* @typename: The name of the type of the object to instantiate.
*
* This function will initialize an object. The memory for the object should
* have already been allocated. The returned object has a reference count of 1,
* and will be finalized when the last reference is dropped.
*/
void object_initialize(void *obj, size_t size, const char *typename);
/**
* object_initialize_child_with_props:
* @parentobj: The parent object to add a property to
* @propname: The name of the property
* @childobj: A pointer to the memory to be used for the object.
* @size: The maximum size available at @childobj for the object.
* @type: The name of the type of the object to instantiate.
* @errp: If an error occurs, a pointer to an area to store the error
* @...: list of property names and values
*
* This function will initialize an object. The memory for the object should
* have already been allocated. The object will then be added as child property
* to a parent with object_property_add_child() function. The returned object
* has a reference count of 1 (for the "child<...>" property from the parent),
* so the object will be finalized automatically when the parent gets removed.
*
* The variadic parameters are a list of pairs of (propname, propvalue)
* strings. The propname of %NULL indicates the end of the property list.
* If the object implements the user creatable interface, the object will
* be marked complete once all the properties have been processed.
*
* Returns: %true on success, %false on failure.
*/
bool object_initialize_child_with_props(Object *parentobj,
const char *propname,
void *childobj, size_t size, const char *type,
Error **errp, ...) G_GNUC_NULL_TERMINATED;
/**
* object_initialize_child_with_propsv:
* @parentobj: The parent object to add a property to
* @propname: The name of the property
* @childobj: A pointer to the memory to be used for the object.
* @size: The maximum size available at @childobj for the object.
* @type: The name of the type of the object to instantiate.
* @errp: If an error occurs, a pointer to an area to store the error
* @vargs: list of property names and values
*
* See object_initialize_child() for documentation.
*
* Returns: %true on success, %false on failure.
*/
bool object_initialize_child_with_propsv(Object *parentobj,
const char *propname,
void *childobj, size_t size, const char *type,
Error **errp, va_list vargs);
/**
* object_initialize_child:
* @parent: The parent object to add a property to
* @propname: The name of the property
* @child: A precisely typed pointer to the memory to be used for the
* object.
* @type: The name of the type of the object to instantiate.
*
* This is like::
*
* object_initialize_child_with_props(parent, propname,
* child, sizeof(*child), type,
* &error_abort, NULL)
*/
#define object_initialize_child(parent, propname, child, type) \
object_initialize_child_internal((parent), (propname), \
(child), sizeof(*(child)), (type))
void object_initialize_child_internal(Object *parent, const char *propname,
void *child, size_t size,
const char *type);
/**
* object_dynamic_cast:
* @obj: The object to cast.
* @typename: The @typename to cast to.
*
* This function will determine if @obj is-a @typename. @obj can refer to an
* object or an interface associated with an object.
*
* Returns: This function returns @obj on success or #NULL on failure.
*/
Object *object_dynamic_cast(Object *obj, const char *typename);
/**
* object_dynamic_cast_assert:
* @obj: The object to cast.
* @typename: The @typename to cast to.
* @file: Source code file where function was called
* @line: Source code line where function was called
* @func: Name of function where this function was called
*
* See object_dynamic_cast() for a description of the parameters of this
* function. The only difference in behavior is that this function asserts
* instead of returning #NULL on failure if QOM cast debugging is enabled.
* This function is not meant to be called directly, but only through
* the wrapper macro OBJECT_CHECK.
*/
Object *object_dynamic_cast_assert(Object *obj, const char *typename,
const char *file, int line, const char *func);
/**
* object_get_class:
* @obj: A derivative of #Object
*
* Returns: The #ObjectClass of the type associated with @obj.
*/
ObjectClass *object_get_class(Object *obj);
/**
* object_get_typename:
* @obj: A derivative of #Object.
*
* Returns: The QOM typename of @obj.
*/
const char *object_get_typename(const Object *obj);
/**
* type_register_static:
* @info: The #TypeInfo of the new type.
*
* @info and all of the strings it points to should exist for the life time
* that the type is registered.
*
* Returns: the new #Type.
*/
Type type_register_static(const TypeInfo *info);
/**
* type_register:
* @info: The #TypeInfo of the new type
*
* Unlike type_register_static(), this call does not require @info or its
* string members to continue to exist after the call returns.
*
* Returns: the new #Type.
*/
Type type_register(const TypeInfo *info);
/**
* type_register_static_array:
* @infos: The array of the new type #TypeInfo structures.
* @nr_infos: number of entries in @infos
*
* @infos and all of the strings it points to should exist for the life time
* that the type is registered.
*/
void type_register_static_array(const TypeInfo *infos, int nr_infos);
/**
* DEFINE_TYPES:
* @type_array: The array containing #TypeInfo structures to register
*
* @type_array should be static constant that exists for the life time
* that the type is registered.
*/
#define DEFINE_TYPES(type_array) \
static void do_qemu_init_ ## type_array(void) \
{ \
type_register_static_array(type_array, ARRAY_SIZE(type_array)); \
} \
type_init(do_qemu_init_ ## type_array)
/**
* type_print_class_properties:
* @type: a QOM class name
*
* Print the object's class properties to stdout or the monitor.
* Return whether an object was found.
*/
bool type_print_class_properties(const char *type);
/**
* object_set_properties_from_keyval:
* @obj: a QOM object
* @qdict: a dictionary with the properties to be set
* @from_json: true if leaf values of @qdict are typed, false if they
* are strings
* @errp: pointer to error object
*
* For each key in the dictionary, parse the value string if needed,
* then set the corresponding property in @obj.
*/
void object_set_properties_from_keyval(Object *obj, const QDict *qdict,
bool from_json, Error **errp);
/**
* object_class_dynamic_cast_assert:
* @klass: The #ObjectClass to attempt to cast.
* @typename: The QOM typename of the class to cast to.
* @file: Source code file where function was called
* @line: Source code line where function was called
* @func: Name of function where this function was called
*
* See object_class_dynamic_cast() for a description of the parameters
* of this function. The only difference in behavior is that this function
* asserts instead of returning #NULL on failure if QOM cast debugging is
* enabled. This function is not meant to be called directly, but only through
* the wrapper macro OBJECT_CLASS_CHECK.
*/
ObjectClass *object_class_dynamic_cast_assert(ObjectClass *klass,
const char *typename,
const char *file, int line,
const char *func);
/**
* object_class_dynamic_cast:
* @klass: The #ObjectClass to attempt to cast.
* @typename: The QOM typename of the class to cast to.
*
* Returns: If @typename is a class, this function returns @klass if
* @typename is a subtype of @klass, else returns #NULL.
*
* If @typename is an interface, this function returns the interface
* definition for @klass if @klass implements it unambiguously; #NULL
* is returned if @klass does not implement the interface or if multiple
* classes or interfaces on the hierarchy leading to @klass implement
* it. (FIXME: perhaps this can be detected at type definition time?)
*/
ObjectClass *object_class_dynamic_cast(ObjectClass *klass,
const char *typename);
/**
* object_class_get_parent:
* @klass: The class to obtain the parent for.
*
* Returns: The parent for @klass or %NULL if none.
*/
ObjectClass *object_class_get_parent(ObjectClass *klass);
/**
* object_class_get_name:
* @klass: The class to obtain the QOM typename for.
*
* Returns: The QOM typename for @klass.
*/
const char *object_class_get_name(ObjectClass *klass);
/**
* object_class_is_abstract:
* @klass: The class to obtain the abstractness for.
*
* Returns: %true if @klass is abstract, %false otherwise.
*/
bool object_class_is_abstract(ObjectClass *klass);
/**
* object_class_by_name:
* @typename: The QOM typename to obtain the class for.
*
* Returns: The class for @typename or %NULL if not found.
*/
ObjectClass *object_class_by_name(const char *typename);
/**
* module_object_class_by_name:
* @typename: The QOM typename to obtain the class for.
*
* For objects which might be provided by a module. Behaves like
* object_class_by_name, but additionally tries to load the module
* needed in case the class is not available.
*
* Returns: The class for @typename or %NULL if not found.
*/
ObjectClass *module_object_class_by_name(const char *typename);
void object_class_foreach(void (*fn)(ObjectClass *klass, void *opaque),
const char *implements_type, bool include_abstract,
void *opaque);
/**
* object_class_get_list:
* @implements_type: The type to filter for, including its derivatives.
* @include_abstract: Whether to include abstract classes.
*
* Returns: A singly-linked list of the classes in reverse hashtable order.
*/
GSList *object_class_get_list(const char *implements_type,
bool include_abstract);
/**
* object_class_get_list_sorted:
* @implements_type: The type to filter for, including its derivatives.
* @include_abstract: Whether to include abstract classes.
*
* Returns: A singly-linked list of the classes in alphabetical
* case-insensitive order.
*/
GSList *object_class_get_list_sorted(const char *implements_type,
bool include_abstract);
/**
* object_ref:
* @obj: the object
*
* Increase the reference count of a object. A object cannot be freed as long
* as its reference count is greater than zero.
* Returns: @obj
*/
Object *object_ref(void *obj);
/**
* object_unref:
* @obj: the object
*
* Decrease the reference count of a object. A object cannot be freed as long
* as its reference count is greater than zero.
*/
void object_unref(void *obj);
/**
* object_property_try_add:
* @obj: the object to add a property to
* @name: the name of the property. This can contain any character except for
* a forward slash. In general, you should use hyphens '-' instead of
* underscores '_' when naming properties.
* @type: the type name of the property. This namespace is pretty loosely
* defined. Sub namespaces are constructed by using a prefix and then
* to angle brackets. For instance, the type 'virtio-net-pci' in the
* 'link' namespace would be 'link<virtio-net-pci>'.
* @get: The getter to be called to read a property. If this is NULL, then
* the property cannot be read.
* @set: the setter to be called to write a property. If this is NULL,
* then the property cannot be written.
* @release: called when the property is removed from the object. This is
* meant to allow a property to free its opaque upon object
* destruction. This may be NULL.
* @opaque: an opaque pointer to pass to the callbacks for the property
* @errp: pointer to error object
*
* Returns: The #ObjectProperty; this can be used to set the @resolve
* callback for child and link properties.
*/
ObjectProperty *object_property_try_add(Object *obj, const char *name,
const char *type,
ObjectPropertyAccessor *get,
ObjectPropertyAccessor *set,
ObjectPropertyRelease *release,
void *opaque, Error **errp);
/**
* object_property_add:
* Same as object_property_try_add() with @errp hardcoded to
* &error_abort.
*
* @obj: the object to add a property to
* @name: the name of the property. This can contain any character except for
* a forward slash. In general, you should use hyphens '-' instead of
* underscores '_' when naming properties.
* @type: the type name of the property. This namespace is pretty loosely
* defined. Sub namespaces are constructed by using a prefix and then
* to angle brackets. For instance, the type 'virtio-net-pci' in the
* 'link' namespace would be 'link<virtio-net-pci>'.
* @get: The getter to be called to read a property. If this is NULL, then
* the property cannot be read.
* @set: the setter to be called to write a property. If this is NULL,
* then the property cannot be written.
* @release: called when the property is removed from the object. This is
* meant to allow a property to free its opaque upon object
* destruction. This may be NULL.
* @opaque: an opaque pointer to pass to the callbacks for the property
*/
ObjectProperty *object_property_add(Object *obj, const char *name,
const char *type,
ObjectPropertyAccessor *get,
ObjectPropertyAccessor *set,
ObjectPropertyRelease *release,
void *opaque);
void object_property_del(Object *obj, const char *name);
ObjectProperty *object_class_property_add(ObjectClass *klass, const char *name,
const char *type,
ObjectPropertyAccessor *get,
ObjectPropertyAccessor *set,
ObjectPropertyRelease *release,
void *opaque);
/**
* object_property_set_default_bool:
* @prop: the property to set
* @value: the value to be written to the property
*
* Set the property default value.
*/
void object_property_set_default_bool(ObjectProperty *prop, bool value);
/**
* object_property_set_default_str:
* @prop: the property to set
* @value: the value to be written to the property
*
* Set the property default value.
*/
void object_property_set_default_str(ObjectProperty *prop, const char *value);
/**
* object_property_set_default_list:
* @prop: the property to set
*
* Set the property default value to be an empty list.
*/
void object_property_set_default_list(ObjectProperty *prop);
/**
* object_property_set_default_int:
* @prop: the property to set
* @value: the value to be written to the property
*
* Set the property default value.
*/
void object_property_set_default_int(ObjectProperty *prop, int64_t value);
/**
* object_property_set_default_uint:
* @prop: the property to set
* @value: the value to be written to the property
*
* Set the property default value.
*/
void object_property_set_default_uint(ObjectProperty *prop, uint64_t value);
/**
* object_property_find:
* @obj: the object
* @name: the name of the property
*
* Look up a property for an object.
*
* Return its #ObjectProperty if found, or NULL.
*/
ObjectProperty *object_property_find(Object *obj, const char *name);
/**
* object_property_find_err:
* @obj: the object
* @name: the name of the property
* @errp: returns an error if this function fails
*
* Look up a property for an object.
*
* Return its #ObjectProperty if found, or NULL.
*/
ObjectProperty *object_property_find_err(Object *obj,
const char *name,
Error **errp);
/**
* object_class_property_find:
* @klass: the object class
* @name: the name of the property
*
* Look up a property for an object class.
*
* Return its #ObjectProperty if found, or NULL.
*/
ObjectProperty *object_class_property_find(ObjectClass *klass,
const char *name);
/**
* object_class_property_find_err:
* @klass: the object class
* @name: the name of the property
* @errp: returns an error if this function fails
*
* Look up a property for an object class.
*
* Return its #ObjectProperty if found, or NULL.
*/
ObjectProperty *object_class_property_find_err(ObjectClass *klass,
const char *name,
Error **errp);
typedef struct ObjectPropertyIterator {
ObjectClass *nextclass;
GHashTableIter iter;
} ObjectPropertyIterator;
/**
* object_property_iter_init:
* @iter: the iterator instance
* @obj: the object
*
* Initializes an iterator for traversing all properties
* registered against an object instance, its class and all parent classes.
*
* It is forbidden to modify the property list while iterating,
* whether removing or adding properties.
*
* Typical usage pattern would be
*
* .. code-block:: c
* :caption: Using object property iterators
*
* ObjectProperty *prop;
* ObjectPropertyIterator iter;
*
* object_property_iter_init(&iter, obj);
* while ((prop = object_property_iter_next(&iter))) {
* ... do something with prop ...
* }
*/
void object_property_iter_init(ObjectPropertyIterator *iter,
Object *obj);
/**
* object_class_property_iter_init:
* @iter: the iterator instance
* @klass: the class
*
* Initializes an iterator for traversing all properties
* registered against an object class and all parent classes.
*
* It is forbidden to modify the property list while iterating,
* whether removing or adding properties.
*
* This can be used on abstract classes as it does not create a temporary
* instance.
*/
void object_class_property_iter_init(ObjectPropertyIterator *iter,
ObjectClass *klass);
/**
* object_property_iter_next:
* @iter: the iterator instance
*
* Return the next available property. If no further properties
* are available, a %NULL value will be returned and the @iter
* pointer should not be used again after this point without
* re-initializing it.
*
* Returns: the next property, or %NULL when all properties
* have been traversed.
*/
ObjectProperty *object_property_iter_next(ObjectPropertyIterator *iter);
void object_unparent(Object *obj);
/**
* object_property_get:
* @obj: the object
* @name: the name of the property
* @v: the visitor that will receive the property value. This should be an
* Output visitor and the data will be written with @name as the name.
* @errp: returns an error if this function fails
*
* Reads a property from a object.
*
* Returns: %true on success, %false on failure.
*/
bool object_property_get(Object *obj, const char *name, Visitor *v,
Error **errp);
/**
* object_property_set_str:
* @obj: the object
* @name: the name of the property
* @value: the value to be written to the property
* @errp: returns an error if this function fails
*
* Writes a string value to a property.
*
* Returns: %true on success, %false on failure.
*/
bool object_property_set_str(Object *obj, const char *name,
const char *value, Error **errp);
/**
* object_property_get_str:
* @obj: the object
* @name: the name of the property
* @errp: returns an error if this function fails
*
* Returns: the value of the property, converted to a C string, or NULL if
* an error occurs (including when the property value is not a string).
* The caller should free the string.
*/
char *object_property_get_str(Object *obj, const char *name,
Error **errp);
/**
* object_property_set_link:
* @obj: the object
* @name: the name of the property
* @value: the value to be written to the property
* @errp: returns an error if this function fails
*
* Writes an object's canonical path to a property.
*
* If the link property was created with
* %OBJ_PROP_LINK_STRONG bit, the old target object is
* unreferenced, and a reference is added to the new target object.
*
* Returns: %true on success, %false on failure.
*/
bool object_property_set_link(Object *obj, const char *name,
Object *value, Error **errp);
/**
* object_property_get_link:
* @obj: the object
* @name: the name of the property
* @errp: returns an error if this function fails
*
* Returns: the value of the property, resolved from a path to an Object,
* or NULL if an error occurs (including when the property value is not a
* string or not a valid object path).
*/
Object *object_property_get_link(Object *obj, const char *name,
Error **errp);
/**
* object_property_set_bool:
* @obj: the object
* @name: the name of the property
* @value: the value to be written to the property
* @errp: returns an error if this function fails
*
* Writes a bool value to a property.
*
* Returns: %true on success, %false on failure.
*/
bool object_property_set_bool(Object *obj, const char *name,
bool value, Error **errp);
/**
* object_property_get_bool:
* @obj: the object
* @name: the name of the property
* @errp: returns an error if this function fails
*
* Returns: the value of the property, converted to a boolean, or false if
* an error occurs (including when the property value is not a bool).
*/
bool object_property_get_bool(Object *obj, const char *name,
Error **errp);
/**
* object_property_set_int:
* @obj: the object
* @name: the name of the property
* @value: the value to be written to the property
* @errp: returns an error if this function fails
*
* Writes an integer value to a property.
*
* Returns: %true on success, %false on failure.
*/
bool object_property_set_int(Object *obj, const char *name,
int64_t value, Error **errp);
/**
* object_property_get_int:
* @obj: the object
* @name: the name of the property
* @errp: returns an error if this function fails
*
* Returns: the value of the property, converted to an integer, or -1 if
* an error occurs (including when the property value is not an integer).
*/
int64_t object_property_get_int(Object *obj, const char *name,
Error **errp);
/**
* object_property_set_uint:
* @obj: the object
* @name: the name of the property
* @value: the value to be written to the property
* @errp: returns an error if this function fails
*
* Writes an unsigned integer value to a property.
*
* Returns: %true on success, %false on failure.
*/
bool object_property_set_uint(Object *obj, const char *name,
uint64_t value, Error **errp);
/**
* object_property_get_uint:
* @obj: the object
* @name: the name of the property
* @errp: returns an error if this function fails
*
* Returns: the value of the property, converted to an unsigned integer, or 0
* an error occurs (including when the property value is not an integer).
*/
uint64_t object_property_get_uint(Object *obj, const char *name,
Error **errp);
/**
* object_property_get_enum:
* @obj: the object
* @name: the name of the property
* @typename: the name of the enum data type
* @errp: returns an error if this function fails
*
* Returns: the value of the property, converted to an integer (which
* can't be negative), or -1 on error (including when the property
* value is not an enum).
*/
int object_property_get_enum(Object *obj, const char *name,
const char *typename, Error **errp);
/**
* object_property_set:
* @obj: the object
* @name: the name of the property
* @v: the visitor that will be used to write the property value. This should
* be an Input visitor and the data will be first read with @name as the
* name and then written as the property value.
* @errp: returns an error if this function fails
*
* Writes a property to a object.
*
* Returns: %true on success, %false on failure.
*/
bool object_property_set(Object *obj, const char *name, Visitor *v,
Error **errp);
/**
* object_property_parse:
* @obj: the object
* @name: the name of the property
* @string: the string that will be used to parse the property value.
* @errp: returns an error if this function fails
*
* Parses a string and writes the result into a property of an object.
*
* Returns: %true on success, %false on failure.
*/
bool object_property_parse(Object *obj, const char *name,
const char *string, Error **errp);
/**
* object_property_print:
* @obj: the object
* @name: the name of the property
* @human: if true, print for human consumption
* @errp: returns an error if this function fails
*
* Returns a string representation of the value of the property. The
* caller shall free the string.
*/
char *object_property_print(Object *obj, const char *name, bool human,
Error **errp);
/**
* object_property_get_type:
* @obj: the object
* @name: the name of the property
* @errp: returns an error if this function fails
*
* Returns: The type name of the property.
*/
const char *object_property_get_type(Object *obj, const char *name,
Error **errp);
/**
* object_get_root:
*
* Returns: the root object of the composition tree
*/
Object *object_get_root(void);
/**
* object_get_objects_root:
*
* Get the container object that holds user created
* object instances. This is the object at path
* "/objects"
*
* Returns: the user object container
*/
Object *object_get_objects_root(void);
/**
* object_get_internal_root:
*
* Get the container object that holds internally used object
* instances. Any object which is put into this container must not be
* user visible, and it will not be exposed in the QOM tree.
*
* Returns: the internal object container
*/
Object *object_get_internal_root(void);
/**
* object_get_canonical_path_component:
* @obj: the object
*
* Returns: The final component in the object's canonical path. The canonical
* path is the path within the composition tree starting from the root.
* %NULL if the object doesn't have a parent (and thus a canonical path).
*/
const char *object_get_canonical_path_component(const Object *obj);
/**
* object_get_canonical_path:
* @obj: the object
*
* Returns: The canonical path for a object, newly allocated. This is
* the path within the composition tree starting from the root. Use
* g_free() to free it.
*/
char *object_get_canonical_path(const Object *obj);
/**
* object_resolve_path:
* @path: the path to resolve
* @ambiguous: (out) (optional): location to store whether the lookup failed
* because it was ambiguous, or %NULL. Set to %false on success.
*
* There are two types of supported paths--absolute paths and partial paths.
*
* Absolute paths are derived from the root object and can follow child<> or
* link<> properties. Since they can follow link<> properties, they can be
* arbitrarily long. Absolute paths look like absolute filenames and are
* prefixed with a leading slash.
*
* Partial paths look like relative filenames. They do not begin with a
* prefix. The matching rules for partial paths are subtle but designed to make
* specifying objects easy. At each level of the composition tree, the partial
* path is matched as an absolute path. The first match is not returned. At
* least two matches are searched for. A successful result is only returned if
* only one match is found. If more than one match is found, a flag is
* returned to indicate that the match was ambiguous.
*
* Returns: The matched object or %NULL on path lookup failure.
*/
Object *object_resolve_path(const char *path, bool *ambiguous);
/**
* object_resolve_path_type:
* @path: the path to resolve
* @typename: the type to look for.
* @ambiguous: (out) (optional): location to store whether the lookup failed
* because it was ambiguous, or %NULL. Set to %false on success.
*
* This is similar to object_resolve_path(). However, when looking for a
* partial path only matches that implement the given type are considered.
* This restricts the search and avoids spuriously flagging matches as
* ambiguous.
*
* For both partial and absolute paths, the return value goes through
* a dynamic cast to @typename. This is important if either the link,
* or the typename itself are of interface types.
*
* Returns: The matched object or NULL on path lookup failure.
*/
Object *object_resolve_path_type(const char *path, const char *typename,
bool *ambiguous);
/**
* object_resolve_type_unambiguous:
* @typename: the type to look for
* @errp: pointer to error object
*
* Return the only object in the QOM tree of type @typename.
* If no match or more than one match is found, an error is
* returned.
*
* Returns: The matched object or NULL on path lookup failure.
*/
Object *object_resolve_type_unambiguous(const char *typename, Error **errp);
/**
* object_resolve_path_at:
* @parent: the object in which to resolve the path
* @path: the path to resolve
*
* This is like object_resolve_path(), except paths not starting with
* a slash are relative to @parent.
*
* Returns: The resolved object or NULL on path lookup failure.
*/
Object *object_resolve_path_at(Object *parent, const char *path);
/**
* object_resolve_path_component:
* @parent: the object in which to resolve the path
* @part: the component to resolve.
*
* This is similar to object_resolve_path with an absolute path, but it
* only resolves one element (@part) and takes the others from @parent.
*
* Returns: The resolved object or NULL on path lookup failure.
*/
Object *object_resolve_path_component(Object *parent, const char *part);
/**
* object_property_try_add_child:
* @obj: the object to add a property to
* @name: the name of the property
* @child: the child object
* @errp: pointer to error object
*
* Child properties form the composition tree. All objects need to be a child
* of another object. Objects can only be a child of one object.
*
* There is no way for a child to determine what its parent is. It is not
* a bidirectional relationship. This is by design.
*
* The value of a child property as a C string will be the child object's
* canonical path. It can be retrieved using object_property_get_str().
* The child object itself can be retrieved using object_property_get_link().
*
* Returns: The newly added property on success, or %NULL on failure.
*/
ObjectProperty *object_property_try_add_child(Object *obj, const char *name,
Object *child, Error **errp);
/**
* object_property_add_child:
* @obj: the object to add a property to
* @name: the name of the property
* @child: the child object
*
* Same as object_property_try_add_child() with @errp hardcoded to
* &error_abort
*/
ObjectProperty *object_property_add_child(Object *obj, const char *name,
Object *child);
typedef enum {
/* Unref the link pointer when the property is deleted */
OBJ_PROP_LINK_STRONG = 0x1,
/* private */
OBJ_PROP_LINK_DIRECT = 0x2,
OBJ_PROP_LINK_CLASS = 0x4,
} ObjectPropertyLinkFlags;
/**
* object_property_allow_set_link:
* @obj: the object to add a property to
* @name: the name of the property
* @child: the child object
* @errp: pointer to error object
*
* The default implementation of the object_property_add_link() check()
* callback function. It allows the link property to be set and never returns
* an error.
*/
void object_property_allow_set_link(const Object *obj, const char *name,
Object *child, Error **errp);
/**
* object_property_add_link:
* @obj: the object to add a property to
* @name: the name of the property
* @type: the qobj type of the link
* @targetp: a pointer to where the link object reference is stored
* @check: callback to veto setting or NULL if the property is read-only
* @flags: additional options for the link
*
* Links establish relationships between objects. Links are unidirectional
* although two links can be combined to form a bidirectional relationship
* between objects.
*
* Links form the graph in the object model.
*
* The @check() callback is invoked when
* object_property_set_link() is called and can raise an error to prevent the
* link being set. If @check is NULL, the property is read-only
* and cannot be set.
*
* Ownership of the pointer that @child points to is transferred to the
* link property. The reference count for *@child is
* managed by the property from after the function returns till the
* property is deleted with object_property_del(). If the
* @flags %OBJ_PROP_LINK_STRONG bit is set,
* the reference count is decremented when the property is deleted or
* modified.
*
* Returns: The newly added property on success, or %NULL on failure.
*/
ObjectProperty *object_property_add_link(Object *obj, const char *name,
const char *type, Object **targetp,
void (*check)(const Object *obj, const char *name,
Object *val, Error **errp),
ObjectPropertyLinkFlags flags);
ObjectProperty *object_class_property_add_link(ObjectClass *oc,
const char *name,
const char *type, ptrdiff_t offset,
void (*check)(const Object *obj, const char *name,
Object *val, Error **errp),
ObjectPropertyLinkFlags flags);
/**
* object_property_add_str:
* @obj: the object to add a property to
* @name: the name of the property
* @get: the getter or NULL if the property is write-only. This function must
* return a string to be freed by g_free().
* @set: the setter or NULL if the property is read-only
*
* Add a string property using getters/setters. This function will add a
* property of type 'string'.
*
* Returns: The newly added property on success, or %NULL on failure.
*/
ObjectProperty *object_property_add_str(Object *obj, const char *name,
char *(*get)(Object *, Error **),
void (*set)(Object *, const char *, Error **));
ObjectProperty *object_class_property_add_str(ObjectClass *klass,
const char *name,
char *(*get)(Object *, Error **),
void (*set)(Object *, const char *,
Error **));
/**
* object_property_add_bool:
* @obj: the object to add a property to
* @name: the name of the property
* @get: the getter or NULL if the property is write-only.
* @set: the setter or NULL if the property is read-only
*
* Add a bool property using getters/setters. This function will add a
* property of type 'bool'.
*
* Returns: The newly added property on success, or %NULL on failure.
*/
ObjectProperty *object_property_add_bool(Object *obj, const char *name,
bool (*get)(Object *, Error **),
void (*set)(Object *, bool, Error **));
ObjectProperty *object_class_property_add_bool(ObjectClass *klass,
const char *name,
bool (*get)(Object *, Error **),
void (*set)(Object *, bool, Error **));
/**
* object_property_add_enum:
* @obj: the object to add a property to
* @name: the name of the property
* @typename: the name of the enum data type
* @lookup: enum value namelookup table
* @get: the getter or %NULL if the property is write-only.
* @set: the setter or %NULL if the property is read-only
*
* Add an enum property using getters/setters. This function will add a
* property of type '@typename'.
*
* Returns: The newly added property on success, or %NULL on failure.
*/
ObjectProperty *object_property_add_enum(Object *obj, const char *name,
const char *typename,
const QEnumLookup *lookup,
int (*get)(Object *, Error **),
void (*set)(Object *, int, Error **));
ObjectProperty *object_class_property_add_enum(ObjectClass *klass,
const char *name,
const char *typename,
const QEnumLookup *lookup,
int (*get)(Object *, Error **),
void (*set)(Object *, int, Error **));
/**
* object_property_add_tm:
* @obj: the object to add a property to
* @name: the name of the property
* @get: the getter or NULL if the property is write-only.
*
* Add a read-only struct tm valued property using a getter function.
* This function will add a property of type 'struct tm'.
*
* Returns: The newly added property on success, or %NULL on failure.
*/
ObjectProperty *object_property_add_tm(Object *obj, const char *name,
void (*get)(Object *, struct tm *, Error **));
ObjectProperty *object_class_property_add_tm(ObjectClass *klass,
const char *name,
void (*get)(Object *, struct tm *, Error **));
typedef enum {
/* Automatically add a getter to the property */
OBJ_PROP_FLAG_READ = 1 << 0,
/* Automatically add a setter to the property */
OBJ_PROP_FLAG_WRITE = 1 << 1,
/* Automatically add a getter and a setter to the property */
OBJ_PROP_FLAG_READWRITE = (OBJ_PROP_FLAG_READ | OBJ_PROP_FLAG_WRITE),
} ObjectPropertyFlags;
/**
* object_property_add_uint8_ptr:
* @obj: the object to add a property to
* @name: the name of the property
* @v: pointer to value
* @flags: bitwise-or'd ObjectPropertyFlags
*
* Add an integer property in memory. This function will add a
* property of type 'uint8'.
*
* Returns: The newly added property on success, or %NULL on failure.
*/
ObjectProperty *object_property_add_uint8_ptr(Object *obj, const char *name,
const uint8_t *v,
ObjectPropertyFlags flags);
ObjectProperty *object_class_property_add_uint8_ptr(ObjectClass *klass,
const char *name,
const uint8_t *v,
ObjectPropertyFlags flags);
/**
* object_property_add_uint16_ptr:
* @obj: the object to add a property to
* @name: the name of the property
* @v: pointer to value
* @flags: bitwise-or'd ObjectPropertyFlags
*
* Add an integer property in memory. This function will add a
* property of type 'uint16'.
*
* Returns: The newly added property on success, or %NULL on failure.
*/
ObjectProperty *object_property_add_uint16_ptr(Object *obj, const char *name,
const uint16_t *v,
ObjectPropertyFlags flags);
ObjectProperty *object_class_property_add_uint16_ptr(ObjectClass *klass,
const char *name,
const uint16_t *v,
ObjectPropertyFlags flags);
/**
* object_property_add_uint32_ptr:
* @obj: the object to add a property to
* @name: the name of the property
* @v: pointer to value
* @flags: bitwise-or'd ObjectPropertyFlags
*
* Add an integer property in memory. This function will add a
* property of type 'uint32'.
*
* Returns: The newly added property on success, or %NULL on failure.
*/
ObjectProperty *object_property_add_uint32_ptr(Object *obj, const char *name,
const uint32_t *v,
ObjectPropertyFlags flags);
ObjectProperty *object_class_property_add_uint32_ptr(ObjectClass *klass,
const char *name,
const uint32_t *v,
ObjectPropertyFlags flags);
/**
* object_property_add_uint64_ptr:
* @obj: the object to add a property to
* @name: the name of the property
* @v: pointer to value
* @flags: bitwise-or'd ObjectPropertyFlags
*
* Add an integer property in memory. This function will add a
* property of type 'uint64'.
*
* Returns: The newly added property on success, or %NULL on failure.
*/
ObjectProperty *object_property_add_uint64_ptr(Object *obj, const char *name,
const uint64_t *v,
ObjectPropertyFlags flags);
ObjectProperty *object_class_property_add_uint64_ptr(ObjectClass *klass,
const char *name,
const uint64_t *v,
ObjectPropertyFlags flags);
/**
* object_property_add_alias:
* @obj: the object to add a property to
* @name: the name of the property
* @target_obj: the object to forward property access to
* @target_name: the name of the property on the forwarded object
*
* Add an alias for a property on an object. This function will add a property
* of the same type as the forwarded property.
*
* The caller must ensure that @target_obj stays alive as long as
* this property exists. In the case of a child object or an alias on the same
* object this will be the case. For aliases to other objects the caller is
* responsible for taking a reference.
*
* Returns: The newly added property on success, or %NULL on failure.
*/
ObjectProperty *object_property_add_alias(Object *obj, const char *name,
Object *target_obj, const char *target_name);
/**
* object_property_add_const_link:
* @obj: the object to add a property to
* @name: the name of the property
* @target: the object to be referred by the link
*
* Add an unmodifiable link for a property on an object. This function will
* add a property of type link<TYPE> where TYPE is the type of @target.
*
* The caller must ensure that @target stays alive as long as
* this property exists. In the case @target is a child of @obj,
* this will be the case. Otherwise, the caller is responsible for
* taking a reference.
*
* Returns: The newly added property on success, or %NULL on failure.
*/
ObjectProperty *object_property_add_const_link(Object *obj, const char *name,
Object *target);
/**
* object_property_set_description:
* @obj: the object owning the property
* @name: the name of the property
* @description: the description of the property on the object
*
* Set an object property's description.
*
* Returns: %true on success, %false on failure.
*/
void object_property_set_description(Object *obj, const char *name,
const char *description);
void object_class_property_set_description(ObjectClass *klass, const char *name,
const char *description);
/**
* object_child_foreach:
* @obj: the object whose children will be navigated
* @fn: the iterator function to be called
* @opaque: an opaque value that will be passed to the iterator
*
* Call @fn passing each child of @obj and @opaque to it, until @fn returns
* non-zero.
*
* It is forbidden to add or remove children from @obj from the @fn
* callback.
*
* Returns: The last value returned by @fn, or 0 if there is no child.
*/
int object_child_foreach(Object *obj, int (*fn)(Object *child, void *opaque),
void *opaque);
/**
* object_child_foreach_recursive:
* @obj: the object whose children will be navigated
* @fn: the iterator function to be called
* @opaque: an opaque value that will be passed to the iterator
*
* Call @fn passing each child of @obj and @opaque to it, until @fn returns
* non-zero. Calls recursively, all child nodes of @obj will also be passed
* all the way down to the leaf nodes of the tree. Depth first ordering.
*
* It is forbidden to add or remove children from @obj (or its
* child nodes) from the @fn callback.
*
* Returns: The last value returned by @fn, or 0 if there is no child.
*/
int object_child_foreach_recursive(Object *obj,
int (*fn)(Object *child, void *opaque),
void *opaque);
/**
* container_get:
* @root: root of the #path, e.g., object_get_root()
* @path: path to the container
*
* Return a container object whose path is @path. Create more containers
* along the path if necessary.
*
* Returns: the container object.
*/
Object *container_get(Object *root, const char *path);
/**
* object_property_help:
* @name: the name of the property
* @type: the type of the property
* @defval: the default value
* @description: description of the property
*
* Returns: a user-friendly formatted string describing the property
* for help purposes.
*/
char *object_property_help(const char *name, const char *type,
QObject *defval, const char *description);
G_DEFINE_AUTOPTR_CLEANUP_FUNC(Object, object_unref)
#endif
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