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authorAndreas Färber <afaerber@suse.de>2012-12-23 00:39:34 +0100
committerAndreas Färber <afaerber@suse.de>2012-12-23 00:40:49 +0100
commit501a7ce7270955be151c442c27620fa7af2f3ce5 (patch)
tree0374e4d581a0246074d55712b81baf01f3c439b6 /include/qom
parent62e0c095450f6a7eb37914991f3f7966aa4da7a1 (diff)
parent36f25d2537c40c6c47f4abee5d31a24863d1adf7 (diff)
Merge branch 'master' of git://git.qemu.org/qemu into qom-cpu
Adapt header include paths. Signed-off-by: Andreas Färber <afaerber@suse.de>
Diffstat (limited to 'include/qom')
-rw-r--r--include/qom/cpu.h151
-rw-r--r--include/qom/object.h1003
-rw-r--r--include/qom/qom-qobject.h42
3 files changed, 1196 insertions, 0 deletions
diff --git a/include/qom/cpu.h b/include/qom/cpu.h
new file mode 100644
index 0000000000..3e9fc3aca5
--- /dev/null
+++ b/include/qom/cpu.h
@@ -0,0 +1,151 @@
+/*
+ * QEMU CPU model
+ *
+ * Copyright (c) 2012 SUSE LINUX Products GmbH
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see
+ * <http://www.gnu.org/licenses/gpl-2.0.html>
+ */
+#ifndef QEMU_CPU_H
+#define QEMU_CPU_H
+
+#include "qom/object.h"
+#include "qemu/thread.h"
+
+/**
+ * SECTION:cpu
+ * @section_id: QEMU-cpu
+ * @title: CPU Class
+ * @short_description: Base class for all CPUs
+ */
+
+#define TYPE_CPU "cpu"
+
+#define CPU(obj) OBJECT_CHECK(CPUState, (obj), TYPE_CPU)
+#define CPU_CLASS(class) OBJECT_CLASS_CHECK(CPUClass, (class), TYPE_CPU)
+#define CPU_GET_CLASS(obj) OBJECT_GET_CLASS(CPUClass, (obj), TYPE_CPU)
+
+typedef struct CPUState CPUState;
+
+/**
+ * CPUClass:
+ * @reset: Callback to reset the #CPUState to its initial state.
+ *
+ * Represents a CPU family or model.
+ */
+typedef struct CPUClass {
+ /*< private >*/
+ ObjectClass parent_class;
+ /*< public >*/
+
+ void (*reset)(CPUState *cpu);
+} CPUClass;
+
+struct KVMState;
+struct kvm_run;
+
+/**
+ * CPUState:
+ * @created: Indicates whether the CPU thread has been successfully created.
+ * @stop: Indicates a pending stop request.
+ * @stopped: Indicates the CPU has been artificially stopped.
+ * @kvm_fd: vCPU file descriptor for KVM.
+ *
+ * State of one CPU core or thread.
+ */
+struct CPUState {
+ /*< private >*/
+ Object parent_obj;
+ /*< public >*/
+
+ struct QemuThread *thread;
+#ifdef _WIN32
+ HANDLE hThread;
+#endif
+ int thread_id;
+ struct QemuCond *halt_cond;
+ struct qemu_work_item *queued_work_first, *queued_work_last;
+ bool thread_kicked;
+ bool created;
+ bool stop;
+ bool stopped;
+
+#if !defined(CONFIG_USER_ONLY)
+ int kvm_fd;
+ bool kvm_vcpu_dirty;
+#endif
+ struct KVMState *kvm_state;
+ struct kvm_run *kvm_run;
+
+ /* TODO Move common fields from CPUArchState here. */
+};
+
+
+/**
+ * cpu_reset:
+ * @cpu: The CPU whose state is to be reset.
+ */
+void cpu_reset(CPUState *cpu);
+
+/**
+ * qemu_cpu_has_work:
+ * @cpu: The vCPU to check.
+ *
+ * Checks whether the CPU has work to do.
+ *
+ * Returns: %true if the CPU has work, %false otherwise.
+ */
+bool qemu_cpu_has_work(CPUState *cpu);
+
+/**
+ * qemu_cpu_is_self:
+ * @cpu: The vCPU to check against.
+ *
+ * Checks whether the caller is executing on the vCPU thread.
+ *
+ * Returns: %true if called from @cpu's thread, %false otherwise.
+ */
+bool qemu_cpu_is_self(CPUState *cpu);
+
+/**
+ * qemu_cpu_kick:
+ * @cpu: The vCPU to kick.
+ *
+ * Kicks @cpu's thread.
+ */
+void qemu_cpu_kick(CPUState *cpu);
+
+/**
+ * cpu_is_stopped:
+ * @cpu: The CPU to check.
+ *
+ * Checks whether the CPU is stopped.
+ *
+ * Returns: %true if run state is not running or if artificially stopped;
+ * %false otherwise.
+ */
+bool cpu_is_stopped(CPUState *cpu);
+
+/**
+ * run_on_cpu:
+ * @cpu: The vCPU to run on.
+ * @func: The function to be executed.
+ * @data: Data to pass to the function.
+ *
+ * Schedules the function @func for execution on the vCPU @cpu.
+ */
+void run_on_cpu(CPUState *cpu, void (*func)(void *data), void *data);
+
+
+#endif
diff --git a/include/qom/object.h b/include/qom/object.h
new file mode 100644
index 0000000000..abe9691cb7
--- /dev/null
+++ b/include/qom/object.h
@@ -0,0 +1,1003 @@
+/*
+ * 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 <glib.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include "qemu/queue.h"
+
+struct Visitor;
+struct Error;
+
+struct TypeImpl;
+typedef struct TypeImpl *Type;
+
+typedef struct ObjectClass ObjectClass;
+typedef struct Object Object;
+
+typedef struct TypeInfo TypeInfo;
+
+typedef struct InterfaceClass InterfaceClass;
+typedef struct InterfaceInfo InterfaceInfo;
+
+#define TYPE_OBJECT "object"
+
+/**
+ * SECTION:object.h
+ * @title:Base Object Type System
+ * @short_description: interfaces for creating new types and objects
+ *
+ * The QEMU Object Model provides a framework for registering user creatable
+ * types and instantiating objects from those types. QOM provides the following
+ * features:
+ *
+ * - System for dynamically registering types
+ * - Support for single-inheritance of types
+ * - Multiple inheritance of stateless interfaces
+ *
+ * <example>
+ * <title>Creating a minimal type</title>
+ * <programlisting>
+ * #include "qdev.h"
+ *
+ * #define TYPE_MY_DEVICE "my-device"
+ *
+ * // No new virtual functions: we can reuse the typedef for the
+ * // superclass.
+ * typedef DeviceClass MyDeviceClass;
+ * typedef struct MyDevice
+ * {
+ * DeviceState parent;
+ *
+ * int reg0, reg1, reg2;
+ * } MyDevice;
+ *
+ * static TypeInfo my_device_info = {
+ * .name = TYPE_MY_DEVICE,
+ * .parent = TYPE_DEVICE,
+ * .instance_size = sizeof(MyDevice),
+ * };
+ *
+ * static void my_device_register_types(void)
+ * {
+ * type_register_static(&my_device_info);
+ * }
+ *
+ * type_init(my_device_register_types)
+ * </programlisting>
+ * </example>
+ *
+ * In the above example, we create a simple type that is described by #TypeInfo.
+ * #TypeInfo describes information about the type including what it inherits
+ * from, the instance and class size, and constructor/destructor hooks.
+ *
+ * Every type has an #ObjectClass associated with it. #ObjectClass derivatives
+ * are instantiated dynamically but there is only ever one instance for any
+ * given type. The #ObjectClass typically holds a table of function pointers
+ * for the virtual methods implemented by this type.
+ *
+ * Using object_new(), a new #Object derivative will be instantiated. You can
+ * cast an #Object to a subclass (or base-class) type using
+ * object_dynamic_cast(). You typically want to define macro wrappers around
+ * OBJECT_CHECK() and OBJECT_CLASS_CHECK() to make it easier to convert to a
+ * specific type:
+ *
+ * <example>
+ * <title>Typecasting macros</title>
+ * <programlisting>
+ * #define MY_DEVICE_GET_CLASS(obj) \
+ * OBJECT_GET_CLASS(MyDeviceClass, obj, TYPE_MY_DEVICE)
+ * #define MY_DEVICE_CLASS(klass) \
+ * OBJECT_CLASS_CHECK(MyDeviceClass, klass, TYPE_MY_DEVICE)
+ * #define MY_DEVICE(obj) \
+ * OBJECT_CHECK(MyDevice, obj, TYPE_MY_DEVICE)
+ * </programlisting>
+ * </example>
+ *
+ * # Class Initialization #
+ *
+ * Before an object is initialized, the class for the object must be
+ * initialized. There is only one class object for all instance objects
+ * that is created lazily.
+ *
+ * Classes are initialized by first initializing any parent classes (if
+ * necessary). After the parent class object has initialized, it will be
+ * copied into the current class object and any additional storage in the
+ * class object is zero filled.
+ *
+ * The effect of this is that classes automatically inherit any virtual
+ * function pointers that the parent class has already initialized. All
+ * other fields will be zero filled.
+ *
+ * Once all of the parent classes have been initialized, #TypeInfo::class_init
+ * is called to let the class being instantiated provide default initialize for
+ * its virtual functions. Here is how the above example might be modified
+ * to introduce an overridden virtual function:
+ *
+ * <example>
+ * <title>Overriding a virtual function</title>
+ * <programlisting>
+ * #include "qdev.h"
+ *
+ * void my_device_class_init(ObjectClass *klass, void *class_data)
+ * {
+ * DeviceClass *dc = DEVICE_CLASS(klass);
+ * dc->reset = my_device_reset;
+ * }
+ *
+ * static TypeInfo my_device_info = {
+ * .name = TYPE_MY_DEVICE,
+ * .parent = TYPE_DEVICE,
+ * .instance_size = sizeof(MyDevice),
+ * .class_init = my_device_class_init,
+ * };
+ * </programlisting>
+ * </example>
+ *
+ * Introducing new virtual functions requires a class to define its own
+ * struct and to add a .class_size member to the TypeInfo. Each function
+ * will also have a wrapper to call it easily:
+ *
+ * <example>
+ * <title>Defining an abstract class</title>
+ * <programlisting>
+ * #include "qdev.h"
+ *
+ * typedef struct MyDeviceClass
+ * {
+ * DeviceClass parent;
+ *
+ * void (*frobnicate) (MyDevice *obj);
+ * } MyDeviceClass;
+ *
+ * static TypeInfo my_device_info = {
+ * .name = TYPE_MY_DEVICE,
+ * .parent = TYPE_DEVICE,
+ * .instance_size = sizeof(MyDevice),
+ * .abstract = true, // or set a default in my_device_class_init
+ * .class_size = sizeof(MyDeviceClass),
+ * };
+ *
+ * void my_device_frobnicate(MyDevice *obj)
+ * {
+ * MyDeviceClass *klass = MY_DEVICE_GET_CLASS(obj);
+ *
+ * klass->frobnicate(obj);
+ * }
+ * </programlisting>
+ * </example>
+ *
+ * # Interfaces #
+ *
+ * Interfaces allow a limited form of multiple inheritance. Instances are
+ * similar to normal types except for the fact that are only defined by
+ * their classes and never carry any state. You can dynamically cast an object
+ * to one of its #Interface types and vice versa.
+ */
+
+
+/**
+ * ObjectPropertyAccessor:
+ * @obj: the object that owns the property
+ * @v: the visitor that contains the property data
+ * @opaque: the object property opaque
+ * @name: the name of the property
+ * @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,
+ struct Visitor *v,
+ void *opaque,
+ const char *name,
+ struct Error **errp);
+
+/**
+ * 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 struct ObjectProperty
+{
+ gchar *name;
+ gchar *type;
+ ObjectPropertyAccessor *get;
+ ObjectPropertyAccessor *set;
+ ObjectPropertyRelease *release;
+ void *opaque;
+
+ QTAILQ_ENTRY(ObjectProperty) node;
+} ObjectProperty;
+
+/**
+ * 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);
+
+/**
+ * ObjectFree:
+ * @obj: the object being freed
+ *
+ * Called when an object's last reference is removed.
+ */
+typedef void (ObjectFree)(void *obj);
+
+/**
+ * ObjectClass:
+ *
+ * The base for all classes. The only thing that #ObjectClass contains is an
+ * integer type handle.
+ */
+struct ObjectClass
+{
+ /*< private >*/
+ Type type;
+ GSList *interfaces;
+
+ ObjectUnparent *unparent;
+};
+
+/**
+ * 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.
+ *
+ * #Object also contains a list of #Interfaces that this object
+ * implements.
+ */
+struct Object
+{
+ /*< private >*/
+ ObjectClass *class;
+ ObjectFree *free;
+ QTAILQ_HEAD(, ObjectProperty) properties;
+ uint32_t ref;
+ Object *parent;
+};
+
+/**
+ * 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_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_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 descendents.
+ * @class_finalize: This function is called during class destruction and is
+ * meant to release and dynamic parameters allocated by @class_init.
+ * @class_data: Data to pass to the @class_init, @class_base_init and
+ * @class_finalize functions. 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;
+ void (*instance_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_finalize)(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)))
+
+/**
+ * OBJECT_CLASS_CHECK:
+ * @class: The C type to use for the return value.
+ * @obj: A derivative of @type to cast.
+ * @name: the QOM typename of @class.
+ *
+ * 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, obj, name) \
+ ((class *)object_class_dynamic_cast_assert(OBJECT_CLASS(obj), (name)))
+
+/**
+ * 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)
+
+/**
+ * InterfaceInfo:
+ * @type: The name of the interface.
+ *
+ * The information associated with an interface.
+ */
+struct InterfaceInfo {
+ const char *type;
+};
+
+/**
+ * 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;
+};
+
+#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)))
+
+/**
+ * object_new:
+ * @typename: The name of the type of the object to instantiate.
+ *
+ * This function will initialize a new object using heap allocated memory. This
+ * function should be paired with object_delete() to free the resources
+ * associated with the object.
+ *
+ * Returns: The newly allocated and instantiated object.
+ */
+Object *object_new(const char *typename);
+
+/**
+ * object_new_with_type:
+ * @type: The type of the object to instantiate.
+ *
+ * This function will initialize a new object using heap allocated memory. This
+ * function should be paired with object_delete() to free the resources
+ * associated with the object.
+ *
+ * Returns: The newly allocated and instantiated object.
+ */
+Object *object_new_with_type(Type type);
+
+/**
+ * object_delete:
+ * @obj: The object to free.
+ *
+ * Finalize an object and then free the memory associated with it. This should
+ * be paired with object_new() to free the resources associated with an object.
+ */
+void object_delete(Object *obj);
+
+/**
+ * object_initialize_with_type:
+ * @obj: A pointer to the memory to be used for the object.
+ * @type: The type of the object to instantiate.
+ *
+ * This function will initialize an object. The memory for the object should
+ * have already been allocated.
+ */
+void object_initialize_with_type(void *data, Type type);
+
+/**
+ * object_initialize:
+ * @obj: A pointer to the memory to be used 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.
+ */
+void object_initialize(void *obj, const char *typename);
+
+/**
+ * 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:
+ *
+ * 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.
+ */
+Object *object_dynamic_cast_assert(Object *obj, const char *typename);
+
+/**
+ * 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(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: 0 on failure, the new #Type on success.
+ */
+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: 0 on failure, the new #Type on success.
+ */
+Type type_register(const TypeInfo *info);
+
+/**
+ * object_class_dynamic_cast_assert:
+ * @klass: The #ObjectClass to attempt to cast.
+ * @typename: The QOM typename of the class to cast to.
+ *
+ * Returns: This function always returns @klass and asserts on failure.
+ */
+ObjectClass *object_class_dynamic_cast_assert(ObjectClass *klass,
+ const char *typename);
+
+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_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);
+
+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_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.
+ */
+void object_ref(Object *obj);
+
+/**
+ * qdef_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(Object *obj);
+
+/**
+ * object_property_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: returns an error if this function fails
+ */
+void object_property_add(Object *obj, const char *name, const char *type,
+ ObjectPropertyAccessor *get,
+ ObjectPropertyAccessor *set,
+ ObjectPropertyRelease *release,
+ void *opaque, struct Error **errp);
+
+void object_property_del(Object *obj, const char *name, struct Error **errp);
+
+/**
+ * object_property_find:
+ * @obj: the object
+ * @name: the name of the property
+ * @errp: returns an error if this function fails
+ *
+ * Look up a property for an object and return its #ObjectProperty if found.
+ */
+ObjectProperty *object_property_find(Object *obj, const char *name,
+ struct Error **errp);
+
+void object_unparent(Object *obj);
+
+/**
+ * object_property_get:
+ * @obj: the object
+ * @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.
+ * @name: the name of the property
+ * @errp: returns an error if this function fails
+ *
+ * Reads a property from a object.
+ */
+void object_property_get(Object *obj, struct Visitor *v, const char *name,
+ struct Error **errp);
+
+/**
+ * object_property_set_str:
+ * @value: the value to be written to the property
+ * @name: the name of the property
+ * @errp: returns an error if this function fails
+ *
+ * Writes a string value to a property.
+ */
+void object_property_set_str(Object *obj, const char *value,
+ const char *name, struct 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,
+ struct Error **errp);
+
+/**
+ * object_property_set_link:
+ * @value: the value to be written to the property
+ * @name: the name of the property
+ * @errp: returns an error if this function fails
+ *
+ * Writes an object's canonical path to a property.
+ */
+void object_property_set_link(Object *obj, Object *value,
+ const char *name, struct 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,
+ struct Error **errp);
+
+/**
+ * object_property_set_bool:
+ * @value: the value to be written to the property
+ * @name: the name of the property
+ * @errp: returns an error if this function fails
+ *
+ * Writes a bool value to a property.
+ */
+void object_property_set_bool(Object *obj, bool value,
+ const char *name, struct 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 NULL if
+ * an error occurs (including when the property value is not a bool).
+ */
+bool object_property_get_bool(Object *obj, const char *name,
+ struct Error **errp);
+
+/**
+ * object_property_set_int:
+ * @value: the value to be written to the property
+ * @name: the name of the property
+ * @errp: returns an error if this function fails
+ *
+ * Writes an integer value to a property.
+ */
+void object_property_set_int(Object *obj, int64_t value,
+ const char *name, struct 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 NULL if
+ * an error occurs (including when the property value is not an integer).
+ */
+int64_t object_property_get_int(Object *obj, const char *name,
+ struct Error **errp);
+
+/**
+ * object_property_set:
+ * @obj: the object
+ * @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.
+ * @name: the name of the property
+ * @errp: returns an error if this function fails
+ *
+ * Writes a property to a object.
+ */
+void object_property_set(Object *obj, struct Visitor *v, const char *name,
+ struct Error **errp);
+
+/**
+ * object_property_parse:
+ * @obj: the object
+ * @string: the string that will be used to parse the property value.
+ * @name: the name of the property
+ * @errp: returns an error if this function fails
+ *
+ * Parses a string and writes the result into a property of an object.
+ */
+void object_property_parse(Object *obj, const char *string,
+ const char *name, struct Error **errp);
+
+/**
+ * object_property_print:
+ * @obj: the object
+ * @name: the name of the property
+ * @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,
+ struct 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,
+ struct Error **errp);
+
+/**
+ * object_get_root:
+ *
+ * Returns: the root object of the composition tree
+ */
+Object *object_get_root(void);
+
+/**
+ * object_get_canonical_path:
+ *
+ * Returns: The canonical path for a object. This is the path within the
+ * composition tree starting from the root.
+ */
+gchar *object_get_canonical_path(Object *obj);
+
+/**
+ * object_resolve_path:
+ * @path: the path to resolve
+ * @ambiguous: returns true if the path resolution failed because of an
+ * ambiguous match
+ *
+ * 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: returns true if the path resolution failed because of an
+ * ambiguous match
+ *
+ * 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_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, gchar *part);
+
+/**
+ * object_property_add_child:
+ * @obj: the object to add a property to
+ * @name: the name of the property
+ * @child: the child object
+ * @errp: if an error occurs, a pointer to an area to store the area
+ *
+ * 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().
+ */
+void object_property_add_child(Object *obj, const char *name,
+ Object *child, struct 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
+ * @child: a pointer to where the link object reference is stored
+ * @errp: if an error occurs, a pointer to an area to store the area
+ *
+ * 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.
+ */
+void object_property_add_link(Object *obj, const char *name,
+ const char *type, Object **child,
+ struct Error **errp);
+
+/**
+ * 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
+ * @errp: if an error occurs, a pointer to an area to store the error
+ *
+ * Add a string property using getters/setters. This function will add a
+ * property of type 'string'.
+ */
+void object_property_add_str(Object *obj, const char *name,
+ char *(*get)(Object *, struct Error **),
+ void (*set)(Object *, const char *, struct Error **),
+ struct Error **errp);
+
+/**
+ * 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
+ * @errp: if an error occurs, a pointer to an area to store the error
+ *
+ * Add a bool property using getters/setters. This function will add a
+ * property of type 'bool'.
+ */
+void object_property_add_bool(Object *obj, const char *name,
+ bool (*get)(Object *, struct Error **),
+ void (*set)(Object *, bool, struct Error **),
+ struct Error **errp);
+
+/**
+ * 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.
+ *
+ * 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);
+
+/**
+ * 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);
+
+
+#endif
diff --git a/include/qom/qom-qobject.h b/include/qom/qom-qobject.h
new file mode 100644
index 0000000000..77cd717e3f
--- /dev/null
+++ b/include/qom/qom-qobject.h
@@ -0,0 +1,42 @@
+/*
+ * QEMU Object Model - QObject wrappers
+ *
+ * Copyright (C) 2012 Red Hat, Inc.
+ *
+ * Author: Paolo Bonzini <pbonzini@redhat.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_QOM_QOBJECT_H
+#define QEMU_QOM_QOBJECT_H
+
+#include "qom/object.h"
+
+/*
+ * object_property_get_qobject:
+ * @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 QObject, or NULL if
+ * an error occurs.
+ */
+struct QObject *object_property_get_qobject(Object *obj, const char *name,
+ struct Error **errp);
+
+/**
+ * object_property_set_qobject:
+ * @obj: the object
+ * @ret: The value that will be written to the property.
+ * @name: the name of the property
+ * @errp: returns an error if this function fails
+ *
+ * Writes a property to a object.
+ */
+void object_property_set_qobject(Object *obj, struct QObject *qobj,
+ const char *name, struct Error **errp);
+
+#endif