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qemu/qom/object.c
Markus Armbruster 7a309cc95b qom: Change object_get_canonical_path_component() not to malloc 
object_get_canonical_path_component() returns a malloced copy of a
property name on success, null on failure.

19 of its 25 callers immediately free the returned copy.

Change object_get_canonical_path_component() to return the property
name directly.  Since modifying the name would be wrong, adjust the
return type to const char *.

Drop the free from the 19 callers become simpler, add the g_strdup()
to the other six.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20200714160202.3121879-4-armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Li Qiang <liq3ea@gmail.com>
2020-07-21 16:23:43 +02:00

2765 lines
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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.
*/
#include "qemu/osdep.h"
#include "hw/qdev-core.h"
#include "qapi/error.h"
#include "qom/object.h"
#include "qom/object_interfaces.h"
#include "qemu/cutils.h"
#include "qapi/visitor.h"
#include "qapi/string-input-visitor.h"
#include "qapi/string-output-visitor.h"
#include "qapi/qobject-input-visitor.h"
#include "qapi/qapi-builtin-visit.h"
#include "qapi/qmp/qerror.h"
#include "qapi/qmp/qjson.h"
#include "trace.h"
/* TODO: replace QObject with a simpler visitor to avoid a dependency
* of the QOM core on QObject? */
#include "qom/qom-qobject.h"
#include "qapi/qmp/qbool.h"
#include "qapi/qmp/qnum.h"
#include "qapi/qmp/qstring.h"
#include "qemu/error-report.h"
#define MAX_INTERFACES 32
typedef struct InterfaceImpl InterfaceImpl;
typedef struct TypeImpl TypeImpl;
struct InterfaceImpl
{
const char *typename;
};
struct TypeImpl
{
const char *name;
size_t class_size;
size_t instance_size;
void (*class_init)(ObjectClass *klass, void *data);
void (*class_base_init)(ObjectClass *klass, void *data);
void *class_data;
void (*instance_init)(Object *obj);
void (*instance_post_init)(Object *obj);
void (*instance_finalize)(Object *obj);
bool abstract;
const char *parent;
TypeImpl *parent_type;
ObjectClass *class;
int num_interfaces;
InterfaceImpl interfaces[MAX_INTERFACES];
};
static Type type_interface;
static GHashTable *type_table_get(void)
{
static GHashTable *type_table;
if (type_table == NULL) {
type_table = g_hash_table_new(g_str_hash, g_str_equal);
}
return type_table;
}
static bool enumerating_types;
static void type_table_add(TypeImpl *ti)
{
assert(!enumerating_types);
g_hash_table_insert(type_table_get(), (void *)ti->name, ti);
}
static TypeImpl *type_table_lookup(const char *name)
{
return g_hash_table_lookup(type_table_get(), name);
}
static TypeImpl *type_new(const TypeInfo *info)
{
TypeImpl *ti = g_malloc0(sizeof(*ti));
int i;
g_assert(info->name != NULL);
if (type_table_lookup(info->name) != NULL) {
fprintf(stderr, "Registering `%s' which already exists\n", info->name);
abort();
}
ti->name = g_strdup(info->name);
ti->parent = g_strdup(info->parent);
ti->class_size = info->class_size;
ti->instance_size = info->instance_size;
ti->class_init = info->class_init;
ti->class_base_init = info->class_base_init;
ti->class_data = info->class_data;
ti->instance_init = info->instance_init;
ti->instance_post_init = info->instance_post_init;
ti->instance_finalize = info->instance_finalize;
ti->abstract = info->abstract;
for (i = 0; info->interfaces && info->interfaces[i].type; i++) {
ti->interfaces[i].typename = g_strdup(info->interfaces[i].type);
}
ti->num_interfaces = i;
return ti;
}
static TypeImpl *type_register_internal(const TypeInfo *info)
{
TypeImpl *ti;
ti = type_new(info);
type_table_add(ti);
return ti;
}
TypeImpl *type_register(const TypeInfo *info)
{
assert(info->parent);
return type_register_internal(info);
}
TypeImpl *type_register_static(const TypeInfo *info)
{
return type_register(info);
}
void type_register_static_array(const TypeInfo *infos, int nr_infos)
{
int i;
for (i = 0; i < nr_infos; i++) {
type_register_static(&infos[i]);
}
}
static TypeImpl *type_get_by_name(const char *name)
{
if (name == NULL) {
return NULL;
}
return type_table_lookup(name);
}
static TypeImpl *type_get_parent(TypeImpl *type)
{
if (!type->parent_type && type->parent) {
type->parent_type = type_get_by_name(type->parent);
if (!type->parent_type) {
fprintf(stderr, "Type '%s' is missing its parent '%s'\n",
type->name, type->parent);
abort();
}
}
return type->parent_type;
}
static bool type_has_parent(TypeImpl *type)
{
return (type->parent != NULL);
}
static size_t type_class_get_size(TypeImpl *ti)
{
if (ti->class_size) {
return ti->class_size;
}
if (type_has_parent(ti)) {
return type_class_get_size(type_get_parent(ti));
}
return sizeof(ObjectClass);
}
static size_t type_object_get_size(TypeImpl *ti)
{
if (ti->instance_size) {
return ti->instance_size;
}
if (type_has_parent(ti)) {
return type_object_get_size(type_get_parent(ti));
}
return 0;
}
size_t object_type_get_instance_size(const char *typename)
{
TypeImpl *type = type_get_by_name(typename);
g_assert(type != NULL);
return type_object_get_size(type);
}
static bool type_is_ancestor(TypeImpl *type, TypeImpl *target_type)
{
assert(target_type);
/* Check if target_type is a direct ancestor of type */
while (type) {
if (type == target_type) {
return true;
}
type = type_get_parent(type);
}
return false;
}
static void type_initialize(TypeImpl *ti);
static void type_initialize_interface(TypeImpl *ti, TypeImpl *interface_type,
TypeImpl *parent_type)
{
InterfaceClass *new_iface;
TypeInfo info = { };
TypeImpl *iface_impl;
info.parent = parent_type->name;
info.name = g_strdup_printf("%s::%s", ti->name, interface_type->name);
info.abstract = true;
iface_impl = type_new(&info);
iface_impl->parent_type = parent_type;
type_initialize(iface_impl);
g_free((char *)info.name);
new_iface = (InterfaceClass *)iface_impl->class;
new_iface->concrete_class = ti->class;
new_iface->interface_type = interface_type;
ti->class->interfaces = g_slist_append(ti->class->interfaces, new_iface);
}
static void object_property_free(gpointer data)
{
ObjectProperty *prop = data;
if (prop->defval) {
qobject_unref(prop->defval);
prop->defval = NULL;
}
g_free(prop->name);
g_free(prop->type);
g_free(prop->description);
g_free(prop);
}
static void type_initialize(TypeImpl *ti)
{
TypeImpl *parent;
if (ti->class) {
return;
}
ti->class_size = type_class_get_size(ti);
ti->instance_size = type_object_get_size(ti);
/* Any type with zero instance_size is implicitly abstract.
* This means interface types are all abstract.
*/
if (ti->instance_size == 0) {
ti->abstract = true;
}
if (type_is_ancestor(ti, type_interface)) {
assert(ti->instance_size == 0);
assert(ti->abstract);
assert(!ti->instance_init);
assert(!ti->instance_post_init);
assert(!ti->instance_finalize);
assert(!ti->num_interfaces);
}
ti->class = g_malloc0(ti->class_size);
parent = type_get_parent(ti);
if (parent) {
type_initialize(parent);
GSList *e;
int i;
g_assert(parent->class_size <= ti->class_size);
g_assert(parent->instance_size <= ti->instance_size);
memcpy(ti->class, parent->class, parent->class_size);
ti->class->interfaces = NULL;
for (e = parent->class->interfaces; e; e = e->next) {
InterfaceClass *iface = e->data;
ObjectClass *klass = OBJECT_CLASS(iface);
type_initialize_interface(ti, iface->interface_type, klass->type);
}
for (i = 0; i < ti->num_interfaces; i++) {
TypeImpl *t = type_get_by_name(ti->interfaces[i].typename);
if (!t) {
error_report("missing interface '%s' for object '%s'",
ti->interfaces[i].typename, parent->name);
abort();
}
for (e = ti->class->interfaces; e; e = e->next) {
TypeImpl *target_type = OBJECT_CLASS(e->data)->type;
if (type_is_ancestor(target_type, t)) {
break;
}
}
if (e) {
continue;
}
type_initialize_interface(ti, t, t);
}
}
ti->class->properties = g_hash_table_new_full(g_str_hash, g_str_equal, NULL,
object_property_free);
ti->class->type = ti;
while (parent) {
if (parent->class_base_init) {
parent->class_base_init(ti->class, ti->class_data);
}
parent = type_get_parent(parent);
}
if (ti->class_init) {
ti->class_init(ti->class, ti->class_data);
}
}
static void object_init_with_type(Object *obj, TypeImpl *ti)
{
if (type_has_parent(ti)) {
object_init_with_type(obj, type_get_parent(ti));
}
if (ti->instance_init) {
ti->instance_init(obj);
}
}
static void object_post_init_with_type(Object *obj, TypeImpl *ti)
{
if (ti->instance_post_init) {
ti->instance_post_init(obj);
}
if (type_has_parent(ti)) {
object_post_init_with_type(obj, type_get_parent(ti));
}
}
bool object_apply_global_props(Object *obj, const GPtrArray *props,
Error **errp)
{
int i;
if (!props) {
return true;
}
for (i = 0; i < props->len; i++) {
GlobalProperty *p = g_ptr_array_index(props, i);
Error *err = NULL;
if (object_dynamic_cast(obj, p->driver) == NULL) {
continue;
}
if (p->optional && !object_property_find(obj, p->property, NULL)) {
continue;
}
p->used = true;
if (!object_property_parse(obj, p->property, p->value, &err)) {
error_prepend(&err, "can't apply global %s.%s=%s: ",
p->driver, p->property, p->value);
/*
* If errp != NULL, propagate error and return.
* If errp == NULL, report a warning, but keep going
* with the remaining globals.
*/
if (errp) {
error_propagate(errp, err);
return false;
} else {
warn_report_err(err);
}
}
}
return true;
}
/*
* Global property defaults
* Slot 0: accelerator's global property defaults
* Slot 1: machine's global property defaults
* Slot 2: global properties from legacy command line option
* Each is a GPtrArray of of GlobalProperty.
* Applied in order, later entries override earlier ones.
*/
static GPtrArray *object_compat_props[3];
/*
* Retrieve @GPtrArray for global property defined with options
* other than "-global". These are generally used for syntactic
* sugar and legacy command line options.
*/
void object_register_sugar_prop(const char *driver, const char *prop, const char *value)
{
GlobalProperty *g;
if (!object_compat_props[2]) {
object_compat_props[2] = g_ptr_array_new();
}
g = g_new0(GlobalProperty, 1);
g->driver = g_strdup(driver);
g->property = g_strdup(prop);
g->value = g_strdup(value);
g_ptr_array_add(object_compat_props[2], g);
}
/*
* Set machine's global property defaults to @compat_props.
* May be called at most once.
*/
void object_set_machine_compat_props(GPtrArray *compat_props)
{
assert(!object_compat_props[1]);
object_compat_props[1] = compat_props;
}
/*
* Set accelerator's global property defaults to @compat_props.
* May be called at most once.
*/
void object_set_accelerator_compat_props(GPtrArray *compat_props)
{
assert(!object_compat_props[0]);
object_compat_props[0] = compat_props;
}
void object_apply_compat_props(Object *obj)
{
int i;
for (i = 0; i < ARRAY_SIZE(object_compat_props); i++) {
object_apply_global_props(obj, object_compat_props[i],
i == 2 ? &error_fatal : &error_abort);
}
}
static void object_class_property_init_all(Object *obj)
{
ObjectPropertyIterator iter;
ObjectProperty *prop;
object_class_property_iter_init(&iter, object_get_class(obj));
while ((prop = object_property_iter_next(&iter))) {
if (prop->init) {
prop->init(obj, prop);
}
}
}
static void object_initialize_with_type(Object *obj, size_t size, TypeImpl *type)
{
type_initialize(type);
g_assert(type->instance_size >= sizeof(Object));
g_assert(type->abstract == false);
g_assert(size >= type->instance_size);
memset(obj, 0, type->instance_size);
obj->class = type->class;
object_ref(obj);
object_class_property_init_all(obj);
obj->properties = g_hash_table_new_full(g_str_hash, g_str_equal,
NULL, object_property_free);
object_init_with_type(obj, type);
object_post_init_with_type(obj, type);
}
void object_initialize(void *data, size_t size, const char *typename)
{
TypeImpl *type = type_get_by_name(typename);
if (!type) {
error_report("missing object type '%s'", typename);
abort();
}
object_initialize_with_type(data, size, type);
}
bool object_initialize_child_with_props(Object *parentobj,
const char *propname,
void *childobj, size_t size,
const char *type,
Error **errp, ...)
{
va_list vargs;
bool ok;
va_start(vargs, errp);
ok = object_initialize_child_with_propsv(parentobj, propname,
childobj, size, type, errp,
vargs);
va_end(vargs);
return ok;
}
bool object_initialize_child_with_propsv(Object *parentobj,
const char *propname,
void *childobj, size_t size,
const char *type,
Error **errp, va_list vargs)
{
bool ok = false;
Object *obj;
UserCreatable *uc;
object_initialize(childobj, size, type);
obj = OBJECT(childobj);
if (!object_set_propv(obj, errp, vargs)) {
goto out;
}
object_property_add_child(parentobj, propname, obj);
uc = (UserCreatable *)object_dynamic_cast(obj, TYPE_USER_CREATABLE);
if (uc) {
if (!user_creatable_complete(uc, errp)) {
object_unparent(obj);
goto out;
}
}
ok = true;
out:
/*
* We want @obj's reference to be 1 on success, 0 on failure.
* On success, it's 2: one taken by object_initialize(), and one
* by object_property_add_child().
* On failure in object_initialize() or earlier, it's 1.
* On failure afterwards, it's also 1: object_unparent() releases
* the reference taken by object_property_add_child().
*/
object_unref(obj);
return ok;
}
void object_initialize_child_internal(Object *parent,
const char *propname,
void *child, size_t size,
const char *type)
{
object_initialize_child_with_props(parent, propname, child, size, type,
&error_abort, NULL);
}
static inline bool object_property_is_child(ObjectProperty *prop)
{
return strstart(prop->type, "child<", NULL);
}
static void object_property_del_all(Object *obj)
{
g_autoptr(GHashTable) done = g_hash_table_new(NULL, NULL);
ObjectProperty *prop;
ObjectPropertyIterator iter;
bool released;
do {
released = false;
object_property_iter_init(&iter, obj);
while ((prop = object_property_iter_next(&iter)) != NULL) {
if (g_hash_table_add(done, prop)) {
if (prop->release) {
prop->release(obj, prop->name, prop->opaque);
released = true;
break;
}
}
}
} while (released);
g_hash_table_unref(obj->properties);
}
static void object_property_del_child(Object *obj, Object *child)
{
ObjectProperty *prop;
GHashTableIter iter;
gpointer key, value;
g_hash_table_iter_init(&iter, obj->properties);
while (g_hash_table_iter_next(&iter, &key, &value)) {
prop = value;
if (object_property_is_child(prop) && prop->opaque == child) {
if (prop->release) {
prop->release(obj, prop->name, prop->opaque);
prop->release = NULL;
}
break;
}
}
g_hash_table_iter_init(&iter, obj->properties);
while (g_hash_table_iter_next(&iter, &key, &value)) {
prop = value;
if (object_property_is_child(prop) && prop->opaque == child) {
g_hash_table_iter_remove(&iter);
break;
}
}
}
void object_unparent(Object *obj)
{
if (obj->parent) {
object_property_del_child(obj->parent, obj);
}
}
static void object_deinit(Object *obj, TypeImpl *type)
{
if (type->instance_finalize) {
type->instance_finalize(obj);
}
if (type_has_parent(type)) {
object_deinit(obj, type_get_parent(type));
}
}
static void object_finalize(void *data)
{
Object *obj = data;
TypeImpl *ti = obj->class->type;
object_property_del_all(obj);
object_deinit(obj, ti);
g_assert(obj->ref == 0);
if (obj->free) {
obj->free(obj);
}
}
static Object *object_new_with_type(Type type)
{
Object *obj;
g_assert(type != NULL);
type_initialize(type);
obj = g_malloc(type->instance_size);
object_initialize_with_type(obj, type->instance_size, type);
obj->free = g_free;
return obj;
}
Object *object_new_with_class(ObjectClass *klass)
{
return object_new_with_type(klass->type);
}
Object *object_new(const char *typename)
{
TypeImpl *ti = type_get_by_name(typename);
return object_new_with_type(ti);
}
Object *object_new_with_props(const char *typename,
Object *parent,
const char *id,
Error **errp,
...)
{
va_list vargs;
Object *obj;
va_start(vargs, errp);
obj = object_new_with_propv(typename, parent, id, errp, vargs);
va_end(vargs);
return obj;
}
Object *object_new_with_propv(const char *typename,
Object *parent,
const char *id,
Error **errp,
va_list vargs)
{
Object *obj;
ObjectClass *klass;
UserCreatable *uc;
klass = object_class_by_name(typename);
if (!klass) {
error_setg(errp, "invalid object type: %s", typename);
return NULL;
}
if (object_class_is_abstract(klass)) {
error_setg(errp, "object type '%s' is abstract", typename);
return NULL;
}
obj = object_new_with_type(klass->type);
if (!object_set_propv(obj, errp, vargs)) {
goto error;
}
if (id != NULL) {
object_property_add_child(parent, id, obj);
}
uc = (UserCreatable *)object_dynamic_cast(obj, TYPE_USER_CREATABLE);
if (uc) {
if (!user_creatable_complete(uc, errp)) {
if (id != NULL) {
object_unparent(obj);
}
goto error;
}
}
object_unref(obj);
return obj;
error:
object_unref(obj);
return NULL;
}
bool object_set_props(Object *obj,
Error **errp,
...)
{
va_list vargs;
bool ret;
va_start(vargs, errp);
ret = object_set_propv(obj, errp, vargs);
va_end(vargs);
return ret;
}
bool object_set_propv(Object *obj,
Error **errp,
va_list vargs)
{
const char *propname;
propname = va_arg(vargs, char *);
while (propname != NULL) {
const char *value = va_arg(vargs, char *);
g_assert(value != NULL);
if (!object_property_parse(obj, propname, value, errp)) {
return false;
}
propname = va_arg(vargs, char *);
}
return true;
}
Object *object_dynamic_cast(Object *obj, const char *typename)
{
if (obj && object_class_dynamic_cast(object_get_class(obj), typename)) {
return obj;
}
return NULL;
}
Object *object_dynamic_cast_assert(Object *obj, const char *typename,
const char *file, int line, const char *func)
{
trace_object_dynamic_cast_assert(obj ? obj->class->type->name : "(null)",
typename, file, line, func);
#ifdef CONFIG_QOM_CAST_DEBUG
int i;
Object *inst;
for (i = 0; obj && i < OBJECT_CLASS_CAST_CACHE; i++) {
if (atomic_read(&obj->class->object_cast_cache[i]) == typename) {
goto out;
}
}
inst = object_dynamic_cast(obj, typename);
if (!inst && obj) {
fprintf(stderr, "%s:%d:%s: Object %p is not an instance of type %s\n",
file, line, func, obj, typename);
abort();
}
assert(obj == inst);
if (obj && obj == inst) {
for (i = 1; i < OBJECT_CLASS_CAST_CACHE; i++) {
atomic_set(&obj->class->object_cast_cache[i - 1],
atomic_read(&obj->class->object_cast_cache[i]));
}
atomic_set(&obj->class->object_cast_cache[i - 1], typename);
}
out:
#endif
return obj;
}
ObjectClass *object_class_dynamic_cast(ObjectClass *class,
const char *typename)
{
ObjectClass *ret = NULL;
TypeImpl *target_type;
TypeImpl *type;
if (!class) {
return NULL;
}
/* A simple fast path that can trigger a lot for leaf classes. */
type = class->type;
if (type->name == typename) {
return class;
}
target_type = type_get_by_name(typename);
if (!target_type) {
/* target class type unknown, so fail the cast */
return NULL;
}
if (type->class->interfaces &&
type_is_ancestor(target_type, type_interface)) {
int found = 0;
GSList *i;
for (i = class->interfaces; i; i = i->next) {
ObjectClass *target_class = i->data;
if (type_is_ancestor(target_class->type, target_type)) {
ret = target_class;
found++;
}
}
/* The match was ambiguous, don't allow a cast */
if (found > 1) {
ret = NULL;
}
} else if (type_is_ancestor(type, target_type)) {
ret = class;
}
return ret;
}
ObjectClass *object_class_dynamic_cast_assert(ObjectClass *class,
const char *typename,
const char *file, int line,
const char *func)
{
ObjectClass *ret;
trace_object_class_dynamic_cast_assert(class ? class->type->name : "(null)",
typename, file, line, func);
#ifdef CONFIG_QOM_CAST_DEBUG
int i;
for (i = 0; class && i < OBJECT_CLASS_CAST_CACHE; i++) {
if (atomic_read(&class->class_cast_cache[i]) == typename) {
ret = class;
goto out;
}
}
#else
if (!class || !class->interfaces) {
return class;
}
#endif
ret = object_class_dynamic_cast(class, typename);
if (!ret && class) {
fprintf(stderr, "%s:%d:%s: Object %p is not an instance of type %s\n",
file, line, func, class, typename);
abort();
}
#ifdef CONFIG_QOM_CAST_DEBUG
if (class && ret == class) {
for (i = 1; i < OBJECT_CLASS_CAST_CACHE; i++) {
atomic_set(&class->class_cast_cache[i - 1],
atomic_read(&class->class_cast_cache[i]));
}
atomic_set(&class->class_cast_cache[i - 1], typename);
}
out:
#endif
return ret;
}
const char *object_get_typename(const Object *obj)
{
return obj->class->type->name;
}
ObjectClass *object_get_class(Object *obj)
{
return obj->class;
}
bool object_class_is_abstract(ObjectClass *klass)
{
return klass->type->abstract;
}
const char *object_class_get_name(ObjectClass *klass)
{
return klass->type->name;
}
ObjectClass *object_class_by_name(const char *typename)
{
TypeImpl *type = type_get_by_name(typename);
if (!type) {
return NULL;
}
type_initialize(type);
return type->class;
}
ObjectClass *module_object_class_by_name(const char *typename)
{
ObjectClass *oc;
oc = object_class_by_name(typename);
#ifdef CONFIG_MODULES
if (!oc) {
module_load_qom_one(typename);
oc = object_class_by_name(typename);
}
#endif
return oc;
}
ObjectClass *object_class_get_parent(ObjectClass *class)
{
TypeImpl *type = type_get_parent(class->type);
if (!type) {
return NULL;
}
type_initialize(type);
return type->class;
}
typedef struct OCFData
{
void (*fn)(ObjectClass *klass, void *opaque);
const char *implements_type;
bool include_abstract;
void *opaque;
} OCFData;
static void object_class_foreach_tramp(gpointer key, gpointer value,
gpointer opaque)
{
OCFData *data = opaque;
TypeImpl *type = value;
ObjectClass *k;
type_initialize(type);
k = type->class;
if (!data->include_abstract && type->abstract) {
return;
}
if (data->implements_type &&
!object_class_dynamic_cast(k, data->implements_type)) {
return;
}
data->fn(k, data->opaque);
}
void object_class_foreach(void (*fn)(ObjectClass *klass, void *opaque),
const char *implements_type, bool include_abstract,
void *opaque)
{
OCFData data = { fn, implements_type, include_abstract, opaque };
enumerating_types = true;
g_hash_table_foreach(type_table_get(), object_class_foreach_tramp, &data);
enumerating_types = false;
}
static int do_object_child_foreach(Object *obj,
int (*fn)(Object *child, void *opaque),
void *opaque, bool recurse)
{
GHashTableIter iter;
ObjectProperty *prop;
int ret = 0;
g_hash_table_iter_init(&iter, obj->properties);
while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) {
if (object_property_is_child(prop)) {
Object *child = prop->opaque;
ret = fn(child, opaque);
if (ret != 0) {
break;
}
if (recurse) {
ret = do_object_child_foreach(child, fn, opaque, true);
if (ret != 0) {
break;
}
}
}
}
return ret;
}
int object_child_foreach(Object *obj, int (*fn)(Object *child, void *opaque),
void *opaque)
{
return do_object_child_foreach(obj, fn, opaque, false);
}
int object_child_foreach_recursive(Object *obj,
int (*fn)(Object *child, void *opaque),
void *opaque)
{
return do_object_child_foreach(obj, fn, opaque, true);
}
static void object_class_get_list_tramp(ObjectClass *klass, void *opaque)
{
GSList **list = opaque;
*list = g_slist_prepend(*list, klass);
}
GSList *object_class_get_list(const char *implements_type,
bool include_abstract)
{
GSList *list = NULL;
object_class_foreach(object_class_get_list_tramp,
implements_type, include_abstract, &list);
return list;
}
static gint object_class_cmp(gconstpointer a, gconstpointer b)
{
return strcasecmp(object_class_get_name((ObjectClass *)a),
object_class_get_name((ObjectClass *)b));
}
GSList *object_class_get_list_sorted(const char *implements_type,
bool include_abstract)
{
return g_slist_sort(object_class_get_list(implements_type, include_abstract),
object_class_cmp);
}
Object *object_ref(Object *obj)
{
if (!obj) {
return NULL;
}
atomic_inc(&obj->ref);
return obj;
}
void object_unref(Object *obj)
{
if (!obj) {
return;
}
g_assert(obj->ref > 0);
/* parent always holds a reference to its children */
if (atomic_fetch_dec(&obj->ref) == 1) {
object_finalize(obj);
}
}
ObjectProperty *
object_property_try_add(Object *obj, const char *name, const char *type,
ObjectPropertyAccessor *get,
ObjectPropertyAccessor *set,
ObjectPropertyRelease *release,
void *opaque, Error **errp)
{
ObjectProperty *prop;
size_t name_len = strlen(name);
if (name_len >= 3 && !memcmp(name + name_len - 3, "[*]", 4)) {
int i;
ObjectProperty *ret;
char *name_no_array = g_strdup(name);
name_no_array[name_len - 3] = '\0';
for (i = 0; ; ++i) {
char *full_name = g_strdup_printf("%s[%d]", name_no_array, i);
ret = object_property_try_add(obj, full_name, type, get, set,
release, opaque, NULL);
g_free(full_name);
if (ret) {
break;
}
}
g_free(name_no_array);
return ret;
}
if (object_property_find(obj, name, NULL) != NULL) {
error_setg(errp, "attempt to add duplicate property '%s' to object (type '%s')",
name, object_get_typename(obj));
return NULL;
}
prop = g_malloc0(sizeof(*prop));
prop->name = g_strdup(name);
prop->type = g_strdup(type);
prop->get = get;
prop->set = set;
prop->release = release;
prop->opaque = opaque;
g_hash_table_insert(obj->properties, prop->name, prop);
return prop;
}
ObjectProperty *
object_property_add(Object *obj, const char *name, const char *type,
ObjectPropertyAccessor *get,
ObjectPropertyAccessor *set,
ObjectPropertyRelease *release,
void *opaque)
{
return object_property_try_add(obj, name, type, get, set, release,
opaque, &error_abort);
}
ObjectProperty *
object_class_property_add(ObjectClass *klass,
const char *name,
const char *type,
ObjectPropertyAccessor *get,
ObjectPropertyAccessor *set,
ObjectPropertyRelease *release,
void *opaque)
{
ObjectProperty *prop;
assert(!object_class_property_find(klass, name, NULL));
prop = g_malloc0(sizeof(*prop));
prop->name = g_strdup(name);
prop->type = g_strdup(type);
prop->get = get;
prop->set = set;
prop->release = release;
prop->opaque = opaque;
g_hash_table_insert(klass->properties, prop->name, prop);
return prop;
}
ObjectProperty *object_property_find(Object *obj, const char *name,
Error **errp)
{
ObjectProperty *prop;
ObjectClass *klass = object_get_class(obj);
prop = object_class_property_find(klass, name, NULL);
if (prop) {
return prop;
}
prop = g_hash_table_lookup(obj->properties, name);
if (prop) {
return prop;
}
error_setg(errp, "Property '.%s' not found", name);
return NULL;
}
void object_property_iter_init(ObjectPropertyIterator *iter,
Object *obj)
{
g_hash_table_iter_init(&iter->iter, obj->properties);
iter->nextclass = object_get_class(obj);
}
ObjectProperty *object_property_iter_next(ObjectPropertyIterator *iter)
{
gpointer key, val;
while (!g_hash_table_iter_next(&iter->iter, &key, &val)) {
if (!iter->nextclass) {
return NULL;
}
g_hash_table_iter_init(&iter->iter, iter->nextclass->properties);
iter->nextclass = object_class_get_parent(iter->nextclass);
}
return val;
}
void object_class_property_iter_init(ObjectPropertyIterator *iter,
ObjectClass *klass)
{
g_hash_table_iter_init(&iter->iter, klass->properties);
iter->nextclass = object_class_get_parent(klass);
}
ObjectProperty *object_class_property_find(ObjectClass *klass, const char *name,
Error **errp)
{
ObjectProperty *prop;
ObjectClass *parent_klass;
parent_klass = object_class_get_parent(klass);
if (parent_klass) {
prop = object_class_property_find(parent_klass, name, NULL);
if (prop) {
return prop;
}
}
prop = g_hash_table_lookup(klass->properties, name);
if (!prop) {
error_setg(errp, "Property '.%s' not found", name);
}
return prop;
}
void object_property_del(Object *obj, const char *name)
{
ObjectProperty *prop = g_hash_table_lookup(obj->properties, name);
if (prop->release) {
prop->release(obj, name, prop->opaque);
}
g_hash_table_remove(obj->properties, name);
}
bool object_property_get(Object *obj, const char *name, Visitor *v,
Error **errp)
{
Error *err = NULL;
ObjectProperty *prop = object_property_find(obj, name, errp);
if (prop == NULL) {
return false;
}
if (!prop->get) {
error_setg(errp, QERR_PERMISSION_DENIED);
return false;
}
prop->get(obj, v, name, prop->opaque, &err);
error_propagate(errp, err);
return !err;
}
bool object_property_set(Object *obj, const char *name, Visitor *v,
Error **errp)
{
Error *err = NULL;
ObjectProperty *prop = object_property_find(obj, name, errp);
if (prop == NULL) {
return false;
}
if (!prop->set) {
error_setg(errp, QERR_PERMISSION_DENIED);
return false;
}
prop->set(obj, v, name, prop->opaque, &err);
error_propagate(errp, err);
return !err;
}
bool object_property_set_str(Object *obj, const char *name,
const char *value, Error **errp)
{
QString *qstr = qstring_from_str(value);
bool ok = object_property_set_qobject(obj, name, QOBJECT(qstr), errp);
qobject_unref(qstr);
return ok;
}
char *object_property_get_str(Object *obj, const char *name,
Error **errp)
{
QObject *ret = object_property_get_qobject(obj, name, errp);
char *retval;
if (!ret) {
return NULL;
}
retval = g_strdup(qobject_get_try_str(ret));
if (!retval) {
error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "string");
}
qobject_unref(ret);
return retval;
}
bool object_property_set_link(Object *obj, const char *name,
Object *value, Error **errp)
{
g_autofree char *path = NULL;
if (value) {
path = object_get_canonical_path(value);
}
return object_property_set_str(obj, name, path ?: "", errp);
}
Object *object_property_get_link(Object *obj, const char *name,
Error **errp)
{
char *str = object_property_get_str(obj, name, errp);
Object *target = NULL;
if (str && *str) {
target = object_resolve_path(str, NULL);
if (!target) {
error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
"Device '%s' not found", str);
}
}
g_free(str);
return target;
}
bool object_property_set_bool(Object *obj, const char *name,
bool value, Error **errp)
{
QBool *qbool = qbool_from_bool(value);
bool ok = object_property_set_qobject(obj, name, QOBJECT(qbool), errp);
qobject_unref(qbool);
return ok;
}
bool object_property_get_bool(Object *obj, const char *name,
Error **errp)
{
QObject *ret = object_property_get_qobject(obj, name, errp);
QBool *qbool;
bool retval;
if (!ret) {
return false;
}
qbool = qobject_to(QBool, ret);
if (!qbool) {
error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "boolean");
retval = false;
} else {
retval = qbool_get_bool(qbool);
}
qobject_unref(ret);
return retval;
}
bool object_property_set_int(Object *obj, const char *name,
int64_t value, Error **errp)
{
QNum *qnum = qnum_from_int(value);
bool ok = object_property_set_qobject(obj, name, QOBJECT(qnum), errp);
qobject_unref(qnum);
return ok;
}
int64_t object_property_get_int(Object *obj, const char *name,
Error **errp)
{
QObject *ret = object_property_get_qobject(obj, name, errp);
QNum *qnum;
int64_t retval;
if (!ret) {
return -1;
}
qnum = qobject_to(QNum, ret);
if (!qnum || !qnum_get_try_int(qnum, &retval)) {
error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "int");
retval = -1;
}
qobject_unref(ret);
return retval;
}
static void object_property_init_defval(Object *obj, ObjectProperty *prop)
{
Visitor *v = qobject_input_visitor_new(prop->defval);
assert(prop->set != NULL);
prop->set(obj, v, prop->name, prop->opaque, &error_abort);
visit_free(v);
}
static void object_property_set_default(ObjectProperty *prop, QObject *defval)
{
assert(!prop->defval);
assert(!prop->init);
prop->defval = defval;
prop->init = object_property_init_defval;
}
void object_property_set_default_bool(ObjectProperty *prop, bool value)
{
object_property_set_default(prop, QOBJECT(qbool_from_bool(value)));
}
void object_property_set_default_str(ObjectProperty *prop, const char *value)
{
object_property_set_default(prop, QOBJECT(qstring_from_str(value)));
}
void object_property_set_default_int(ObjectProperty *prop, int64_t value)
{
object_property_set_default(prop, QOBJECT(qnum_from_int(value)));
}
void object_property_set_default_uint(ObjectProperty *prop, uint64_t value)
{
object_property_set_default(prop, QOBJECT(qnum_from_uint(value)));
}
bool object_property_set_uint(Object *obj, const char *name,
uint64_t value, Error **errp)
{
QNum *qnum = qnum_from_uint(value);
bool ok = object_property_set_qobject(obj, name, QOBJECT(qnum), errp);
qobject_unref(qnum);
return ok;
}
uint64_t object_property_get_uint(Object *obj, const char *name,
Error **errp)
{
QObject *ret = object_property_get_qobject(obj, name, errp);
QNum *qnum;
uint64_t retval;
if (!ret) {
return 0;
}
qnum = qobject_to(QNum, ret);
if (!qnum || !qnum_get_try_uint(qnum, &retval)) {
error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "uint");
retval = 0;
}
qobject_unref(ret);
return retval;
}
typedef struct EnumProperty {
const QEnumLookup *lookup;
int (*get)(Object *, Error **);
void (*set)(Object *, int, Error **);
} EnumProperty;
int object_property_get_enum(Object *obj, const char *name,
const char *typename, Error **errp)
{
char *str;
int ret;
ObjectProperty *prop = object_property_find(obj, name, errp);
EnumProperty *enumprop;
if (prop == NULL) {
return 0;
}
if (!g_str_equal(prop->type, typename)) {
error_setg(errp, "Property %s on %s is not '%s' enum type",
name, object_class_get_name(
object_get_class(obj)), typename);
return 0;
}
enumprop = prop->opaque;
str = object_property_get_str(obj, name, errp);
if (!str) {
return 0;
}
ret = qapi_enum_parse(enumprop->lookup, str, -1, errp);
g_free(str);
return ret;
}
bool object_property_parse(Object *obj, const char *name,
const char *string, Error **errp)
{
Visitor *v = string_input_visitor_new(string);
bool ok = object_property_set(obj, name, v, errp);
visit_free(v);
return ok;
}
char *object_property_print(Object *obj, const char *name, bool human,
Error **errp)
{
Visitor *v;
char *string = NULL;
v = string_output_visitor_new(human, &string);
if (!object_property_get(obj, name, v, errp)) {
goto out;
}
visit_complete(v, &string);
out:
visit_free(v);
return string;
}
const char *object_property_get_type(Object *obj, const char *name, Error **errp)
{
ObjectProperty *prop = object_property_find(obj, name, errp);
if (prop == NULL) {
return NULL;
}
return prop->type;
}
Object *object_get_root(void)
{
static Object *root;
if (!root) {
root = object_new("container");
}
return root;
}
Object *object_get_objects_root(void)
{
return container_get(object_get_root(), "/objects");
}
Object *object_get_internal_root(void)
{
static Object *internal_root;
if (!internal_root) {
internal_root = object_new("container");
}
return internal_root;
}
static void object_get_child_property(Object *obj, Visitor *v,
const char *name, void *opaque,
Error **errp)
{
Object *child = opaque;
char *path;
path = object_get_canonical_path(child);
visit_type_str(v, name, &path, errp);
g_free(path);
}
static Object *object_resolve_child_property(Object *parent, void *opaque,
const char *part)
{
return opaque;
}
static void object_finalize_child_property(Object *obj, const char *name,
void *opaque)
{
Object *child = opaque;
if (child->class->unparent) {
(child->class->unparent)(child);
}
child->parent = NULL;
object_unref(child);
}
ObjectProperty *
object_property_try_add_child(Object *obj, const char *name,
Object *child, Error **errp)
{
g_autofree char *type = NULL;
ObjectProperty *op;
assert(!child->parent);
type = g_strdup_printf("child<%s>", object_get_typename(child));
op = object_property_try_add(obj, name, type, object_get_child_property,
NULL, object_finalize_child_property,
child, errp);
if (!op) {
return NULL;
}
op->resolve = object_resolve_child_property;
object_ref(child);
child->parent = obj;
return op;
}
ObjectProperty *
object_property_add_child(Object *obj, const char *name,
Object *child)
{
return object_property_try_add_child(obj, name, child, &error_abort);
}
void object_property_allow_set_link(const Object *obj, const char *name,
Object *val, Error **errp)
{
/* Allow the link to be set, always */
}
typedef struct {
union {
Object **targetp;
Object *target; /* if OBJ_PROP_LINK_DIRECT, when holding the pointer */
ptrdiff_t offset; /* if OBJ_PROP_LINK_CLASS */
};
void (*check)(const Object *, const char *, Object *, Error **);
ObjectPropertyLinkFlags flags;
} LinkProperty;
static Object **
object_link_get_targetp(Object *obj, LinkProperty *lprop)
{
if (lprop->flags & OBJ_PROP_LINK_DIRECT) {
return &lprop->target;
} else if (lprop->flags & OBJ_PROP_LINK_CLASS) {
return (void *)obj + lprop->offset;
} else {
return lprop->targetp;
}
}
static void object_get_link_property(Object *obj, Visitor *v,
const char *name, void *opaque,
Error **errp)
{
LinkProperty *lprop = opaque;
Object **targetp = object_link_get_targetp(obj, lprop);
char *path;
if (*targetp) {
path = object_get_canonical_path(*targetp);
visit_type_str(v, name, &path, errp);
g_free(path);
} else {
path = (char *)"";
visit_type_str(v, name, &path, errp);
}
}
/*
* object_resolve_link:
*
* Lookup an object and ensure its type matches the link property type. This
* is similar to object_resolve_path() except type verification against the
* link property is performed.
*
* Returns: The matched object or NULL on path lookup failures.
*/
static Object *object_resolve_link(Object *obj, const char *name,
const char *path, Error **errp)
{
const char *type;
char *target_type;
bool ambiguous = false;
Object *target;
/* Go from link<FOO> to FOO. */
type = object_property_get_type(obj, name, NULL);
target_type = g_strndup(&type[5], strlen(type) - 6);
target = object_resolve_path_type(path, target_type, &ambiguous);
if (ambiguous) {
error_setg(errp, "Path '%s' does not uniquely identify an object",
path);
} else if (!target) {
target = object_resolve_path(path, &ambiguous);
if (target || ambiguous) {
error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, target_type);
} else {
error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
"Device '%s' not found", path);
}
target = NULL;
}
g_free(target_type);
return target;
}
static void object_set_link_property(Object *obj, Visitor *v,
const char *name, void *opaque,
Error **errp)
{
Error *local_err = NULL;
LinkProperty *prop = opaque;
Object **targetp = object_link_get_targetp(obj, prop);
Object *old_target = *targetp;
Object *new_target;
char *path = NULL;
if (!visit_type_str(v, name, &path, errp)) {
return;
}
if (*path) {
new_target = object_resolve_link(obj, name, path, errp);
if (!new_target) {
g_free(path);
return;
}
} else {
new_target = NULL;
}
g_free(path);
prop->check(obj, name, new_target, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
*targetp = new_target;
if (prop->flags & OBJ_PROP_LINK_STRONG) {
object_ref(new_target);
object_unref(old_target);
}
}
static Object *object_resolve_link_property(Object *parent, void *opaque,
const char *part)
{
LinkProperty *lprop = opaque;
return *object_link_get_targetp(parent, lprop);
}
static void object_release_link_property(Object *obj, const char *name,
void *opaque)
{
LinkProperty *prop = opaque;
Object **targetp = object_link_get_targetp(obj, prop);
if ((prop->flags & OBJ_PROP_LINK_STRONG) && *targetp) {
object_unref(*targetp);
}
if (!(prop->flags & OBJ_PROP_LINK_CLASS)) {
g_free(prop);
}
}
static ObjectProperty *
object_add_link_prop(Object *obj, const char *name,
const char *type, void *ptr,
void (*check)(const Object *, const char *,
Object *, Error **),
ObjectPropertyLinkFlags flags)
{
LinkProperty *prop = g_malloc(sizeof(*prop));
g_autofree char *full_type = NULL;
ObjectProperty *op;
if (flags & OBJ_PROP_LINK_DIRECT) {
prop->target = ptr;
} else {
prop->targetp = ptr;
}
prop->check = check;
prop->flags = flags;
full_type = g_strdup_printf("link<%s>", type);
op = object_property_add(obj, name, full_type,
object_get_link_property,
check ? object_set_link_property : NULL,
object_release_link_property,
prop);
op->resolve = object_resolve_link_property;
return op;
}
ObjectProperty *
object_property_add_link(Object *obj, const char *name,
const char *type, Object **targetp,
void (*check)(const Object *, const char *,
Object *, Error **),
ObjectPropertyLinkFlags flags)
{
return object_add_link_prop(obj, name, type, targetp, check, 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)
{
LinkProperty *prop = g_new0(LinkProperty, 1);
char *full_type;
ObjectProperty *op;
prop->offset = offset;
prop->check = check;
prop->flags = flags | OBJ_PROP_LINK_CLASS;
full_type = g_strdup_printf("link<%s>", type);
op = object_class_property_add(oc, name, full_type,
object_get_link_property,
check ? object_set_link_property : NULL,
object_release_link_property,
prop);
op->resolve = object_resolve_link_property;
g_free(full_type);
return op;
}
ObjectProperty *
object_property_add_const_link(Object *obj, const char *name,
Object *target)
{
return object_add_link_prop(obj, name,
object_get_typename(target), target,
NULL, OBJ_PROP_LINK_DIRECT);
}
const char *object_get_canonical_path_component(const Object *obj)
{
ObjectProperty *prop = NULL;
GHashTableIter iter;
if (obj->parent == NULL) {
return NULL;
}
g_hash_table_iter_init(&iter, obj->parent->properties);
while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) {
if (!object_property_is_child(prop)) {
continue;
}
if (prop->opaque == obj) {
return prop->name;
}
}
/* obj had a parent but was not a child, should never happen */
g_assert_not_reached();
return NULL;
}
char *object_get_canonical_path(const Object *obj)
{
Object *root = object_get_root();
char *newpath, *path = NULL;
if (obj == root) {
return g_strdup("/");
}
do {
const char *component = object_get_canonical_path_component(obj);
if (!component) {
/* A canonical path must be complete, so discard what was
* collected so far.
*/
g_free(path);
return NULL;
}
newpath = g_strdup_printf("/%s%s", component, path ? path : "");
g_free(path);
path = newpath;
obj = obj->parent;
} while (obj != root);
return path;
}
Object *object_resolve_path_component(Object *parent, const char *part)
{
ObjectProperty *prop = object_property_find(parent, part, NULL);
if (prop == NULL) {
return NULL;
}
if (prop->resolve) {
return prop->resolve(parent, prop->opaque, part);
} else {
return NULL;
}
}
static Object *object_resolve_abs_path(Object *parent,
char **parts,
const char *typename)
{
Object *child;
if (*parts == NULL) {
return object_dynamic_cast(parent, typename);
}
if (strcmp(*parts, "") == 0) {
return object_resolve_abs_path(parent, parts + 1, typename);
}
child = object_resolve_path_component(parent, *parts);
if (!child) {
return NULL;
}
return object_resolve_abs_path(child, parts + 1, typename);
}
static Object *object_resolve_partial_path(Object *parent,
char **parts,
const char *typename,
bool *ambiguous)
{
Object *obj;
GHashTableIter iter;
ObjectProperty *prop;
obj = object_resolve_abs_path(parent, parts, typename);
g_hash_table_iter_init(&iter, parent->properties);
while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) {
Object *found;
if (!object_property_is_child(prop)) {
continue;
}
found = object_resolve_partial_path(prop->opaque, parts,
typename, ambiguous);
if (found) {
if (obj) {
*ambiguous = true;
return NULL;
}
obj = found;
}
if (*ambiguous) {
return NULL;
}
}
return obj;
}
Object *object_resolve_path_type(const char *path, const char *typename,
bool *ambiguousp)
{
Object *obj;
char **parts;
parts = g_strsplit(path, "/", 0);
assert(parts);
if (parts[0] == NULL || strcmp(parts[0], "") != 0) {
bool ambiguous = false;
obj = object_resolve_partial_path(object_get_root(), parts,
typename, &ambiguous);
if (ambiguousp) {
*ambiguousp = ambiguous;
}
} else {
obj = object_resolve_abs_path(object_get_root(), parts + 1, typename);
}
g_strfreev(parts);
return obj;
}
Object *object_resolve_path(const char *path, bool *ambiguous)
{
return object_resolve_path_type(path, TYPE_OBJECT, ambiguous);
}
typedef struct StringProperty
{
char *(*get)(Object *, Error **);
void (*set)(Object *, const char *, Error **);
} StringProperty;
static void property_get_str(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
StringProperty *prop = opaque;
char *value;
Error *err = NULL;
value = prop->get(obj, &err);
if (err) {
error_propagate(errp, err);
return;
}
visit_type_str(v, name, &value, errp);
g_free(value);
}
static void property_set_str(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
StringProperty *prop = opaque;
char *value;
if (!visit_type_str(v, name, &value, errp)) {
return;
}
prop->set(obj, value, errp);
g_free(value);
}
static void property_release_str(Object *obj, const char *name,
void *opaque)
{
StringProperty *prop = opaque;
g_free(prop);
}
ObjectProperty *
object_property_add_str(Object *obj, const char *name,
char *(*get)(Object *, Error **),
void (*set)(Object *, const char *, Error **))
{
StringProperty *prop = g_malloc0(sizeof(*prop));
prop->get = get;
prop->set = set;
return object_property_add(obj, name, "string",
get ? property_get_str : NULL,
set ? property_set_str : NULL,
property_release_str,
prop);
}
ObjectProperty *
object_class_property_add_str(ObjectClass *klass, const char *name,
char *(*get)(Object *, Error **),
void (*set)(Object *, const char *,
Error **))
{
StringProperty *prop = g_malloc0(sizeof(*prop));
prop->get = get;
prop->set = set;
return object_class_property_add(klass, name, "string",
get ? property_get_str : NULL,
set ? property_set_str : NULL,
NULL,
prop);
}
typedef struct BoolProperty
{
bool (*get)(Object *, Error **);
void (*set)(Object *, bool, Error **);
} BoolProperty;
static void property_get_bool(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
BoolProperty *prop = opaque;
bool value;
Error *err = NULL;
value = prop->get(obj, &err);
if (err) {
error_propagate(errp, err);
return;
}
visit_type_bool(v, name, &value, errp);
}
static void property_set_bool(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
BoolProperty *prop = opaque;
bool value;
if (!visit_type_bool(v, name, &value, errp)) {
return;
}
prop->set(obj, value, errp);
}
static void property_release_bool(Object *obj, const char *name,
void *opaque)
{
BoolProperty *prop = opaque;
g_free(prop);
}
ObjectProperty *
object_property_add_bool(Object *obj, const char *name,
bool (*get)(Object *, Error **),
void (*set)(Object *, bool, Error **))
{
BoolProperty *prop = g_malloc0(sizeof(*prop));
prop->get = get;
prop->set = set;
return object_property_add(obj, name, "bool",
get ? property_get_bool : NULL,
set ? property_set_bool : NULL,
property_release_bool,
prop);
}
ObjectProperty *
object_class_property_add_bool(ObjectClass *klass, const char *name,
bool (*get)(Object *, Error **),
void (*set)(Object *, bool, Error **))
{
BoolProperty *prop = g_malloc0(sizeof(*prop));
prop->get = get;
prop->set = set;
return object_class_property_add(klass, name, "bool",
get ? property_get_bool : NULL,
set ? property_set_bool : NULL,
NULL,
prop);
}
static void property_get_enum(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
EnumProperty *prop = opaque;
int value;
Error *err = NULL;
value = prop->get(obj, &err);
if (err) {
error_propagate(errp, err);
return;
}
visit_type_enum(v, name, &value, prop->lookup, errp);
}
static void property_set_enum(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
EnumProperty *prop = opaque;
int value;
if (!visit_type_enum(v, name, &value, prop->lookup, errp)) {
return;
}
prop->set(obj, value, errp);
}
static void property_release_enum(Object *obj, const char *name,
void *opaque)
{
EnumProperty *prop = opaque;
g_free(prop);
}
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 **))
{
EnumProperty *prop = g_malloc(sizeof(*prop));
prop->lookup = lookup;
prop->get = get;
prop->set = set;
return object_property_add(obj, name, typename,
get ? property_get_enum : NULL,
set ? property_set_enum : NULL,
property_release_enum,
prop);
}
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 **))
{
EnumProperty *prop = g_malloc(sizeof(*prop));
prop->lookup = lookup;
prop->get = get;
prop->set = set;
return object_class_property_add(klass, name, typename,
get ? property_get_enum : NULL,
set ? property_set_enum : NULL,
NULL,
prop);
}
typedef struct TMProperty {
void (*get)(Object *, struct tm *, Error **);
} TMProperty;
static void property_get_tm(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
TMProperty *prop = opaque;
Error *err = NULL;
struct tm value;
prop->get(obj, &value, &err);
if (err) {
error_propagate(errp, err);
return;
}
if (!visit_start_struct(v, name, NULL, 0, errp)) {
return;
}
if (!visit_type_int32(v, "tm_year", &value.tm_year, errp)) {
goto out_end;
}
if (!visit_type_int32(v, "tm_mon", &value.tm_mon, errp)) {
goto out_end;
}
if (!visit_type_int32(v, "tm_mday", &value.tm_mday, errp)) {
goto out_end;
}
if (!visit_type_int32(v, "tm_hour", &value.tm_hour, errp)) {
goto out_end;
}
if (!visit_type_int32(v, "tm_min", &value.tm_min, errp)) {
goto out_end;
}
if (!visit_type_int32(v, "tm_sec", &value.tm_sec, errp)) {
goto out_end;
}
visit_check_struct(v, errp);
out_end:
visit_end_struct(v, NULL);
}
static void property_release_tm(Object *obj, const char *name,
void *opaque)
{
TMProperty *prop = opaque;
g_free(prop);
}
ObjectProperty *
object_property_add_tm(Object *obj, const char *name,
void (*get)(Object *, struct tm *, Error **))
{
TMProperty *prop = g_malloc0(sizeof(*prop));
prop->get = get;
return object_property_add(obj, name, "struct tm",
get ? property_get_tm : NULL, NULL,
property_release_tm,
prop);
}
ObjectProperty *
object_class_property_add_tm(ObjectClass *klass, const char *name,
void (*get)(Object *, struct tm *, Error **))
{
TMProperty *prop = g_malloc0(sizeof(*prop));
prop->get = get;
return object_class_property_add(klass, name, "struct tm",
get ? property_get_tm : NULL,
NULL, NULL, prop);
}
static char *object_get_type(Object *obj, Error **errp)
{
return g_strdup(object_get_typename(obj));
}
static void property_get_uint8_ptr(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
uint8_t value = *(uint8_t *)opaque;
visit_type_uint8(v, name, &value, errp);
}
static void property_set_uint8_ptr(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
uint8_t *field = opaque;
uint8_t value;
if (!visit_type_uint8(v, name, &value, errp)) {
return;
}
*field = value;
}
static void property_get_uint16_ptr(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
uint16_t value = *(uint16_t *)opaque;
visit_type_uint16(v, name, &value, errp);
}
static void property_set_uint16_ptr(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
uint16_t *field = opaque;
uint16_t value;
if (!visit_type_uint16(v, name, &value, errp)) {
return;
}
*field = value;
}
static void property_get_uint32_ptr(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
uint32_t value = *(uint32_t *)opaque;
visit_type_uint32(v, name, &value, errp);
}
static void property_set_uint32_ptr(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
uint32_t *field = opaque;
uint32_t value;
if (!visit_type_uint32(v, name, &value, errp)) {
return;
}
*field = value;
}
static void property_get_uint64_ptr(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
uint64_t value = *(uint64_t *)opaque;
visit_type_uint64(v, name, &value, errp);
}
static void property_set_uint64_ptr(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
uint64_t *field = opaque;
uint64_t value;
if (!visit_type_uint64(v, name, &value, errp)) {
return;
}
*field = value;
}
ObjectProperty *
object_property_add_uint8_ptr(Object *obj, const char *name,
const uint8_t *v,
ObjectPropertyFlags flags)
{
ObjectPropertyAccessor *getter = NULL;
ObjectPropertyAccessor *setter = NULL;
if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
getter = property_get_uint8_ptr;
}
if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
setter = property_set_uint8_ptr;
}
return object_property_add(obj, name, "uint8",
getter, setter, NULL, (void *)v);
}
ObjectProperty *
object_class_property_add_uint8_ptr(ObjectClass *klass, const char *name,
const uint8_t *v,
ObjectPropertyFlags flags)
{
ObjectPropertyAccessor *getter = NULL;
ObjectPropertyAccessor *setter = NULL;
if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
getter = property_get_uint8_ptr;
}
if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
setter = property_set_uint8_ptr;
}
return object_class_property_add(klass, name, "uint8",
getter, setter, NULL, (void *)v);
}
ObjectProperty *
object_property_add_uint16_ptr(Object *obj, const char *name,
const uint16_t *v,
ObjectPropertyFlags flags)
{
ObjectPropertyAccessor *getter = NULL;
ObjectPropertyAccessor *setter = NULL;
if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
getter = property_get_uint16_ptr;
}
if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
setter = property_set_uint16_ptr;
}
return object_property_add(obj, name, "uint16",
getter, setter, NULL, (void *)v);
}
ObjectProperty *
object_class_property_add_uint16_ptr(ObjectClass *klass, const char *name,
const uint16_t *v,
ObjectPropertyFlags flags)
{
ObjectPropertyAccessor *getter = NULL;
ObjectPropertyAccessor *setter = NULL;
if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
getter = property_get_uint16_ptr;
}
if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
setter = property_set_uint16_ptr;
}
return object_class_property_add(klass, name, "uint16",
getter, setter, NULL, (void *)v);
}
ObjectProperty *
object_property_add_uint32_ptr(Object *obj, const char *name,
const uint32_t *v,
ObjectPropertyFlags flags)
{
ObjectPropertyAccessor *getter = NULL;
ObjectPropertyAccessor *setter = NULL;
if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
getter = property_get_uint32_ptr;
}
if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
setter = property_set_uint32_ptr;
}
return object_property_add(obj, name, "uint32",
getter, setter, NULL, (void *)v);
}
ObjectProperty *
object_class_property_add_uint32_ptr(ObjectClass *klass, const char *name,
const uint32_t *v,
ObjectPropertyFlags flags)
{
ObjectPropertyAccessor *getter = NULL;
ObjectPropertyAccessor *setter = NULL;
if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
getter = property_get_uint32_ptr;
}
if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
setter = property_set_uint32_ptr;
}
return object_class_property_add(klass, name, "uint32",
getter, setter, NULL, (void *)v);
}
ObjectProperty *
object_property_add_uint64_ptr(Object *obj, const char *name,
const uint64_t *v,
ObjectPropertyFlags flags)
{
ObjectPropertyAccessor *getter = NULL;
ObjectPropertyAccessor *setter = NULL;
if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
getter = property_get_uint64_ptr;
}
if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
setter = property_set_uint64_ptr;
}
return object_property_add(obj, name, "uint64",
getter, setter, NULL, (void *)v);
}
ObjectProperty *
object_class_property_add_uint64_ptr(ObjectClass *klass, const char *name,
const uint64_t *v,
ObjectPropertyFlags flags)
{
ObjectPropertyAccessor *getter = NULL;
ObjectPropertyAccessor *setter = NULL;
if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
getter = property_get_uint64_ptr;
}
if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
setter = property_set_uint64_ptr;
}
return object_class_property_add(klass, name, "uint64",
getter, setter, NULL, (void *)v);
}
typedef struct {
Object *target_obj;
char *target_name;
} AliasProperty;
static void property_get_alias(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
AliasProperty *prop = opaque;
object_property_get(prop->target_obj, prop->target_name, v, errp);
}
static void property_set_alias(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
AliasProperty *prop = opaque;
object_property_set(prop->target_obj, prop->target_name, v, errp);
}
static Object *property_resolve_alias(Object *obj, void *opaque,
const char *part)
{
AliasProperty *prop = opaque;
return object_resolve_path_component(prop->target_obj, prop->target_name);
}
static void property_release_alias(Object *obj, const char *name, void *opaque)
{
AliasProperty *prop = opaque;
g_free(prop->target_name);
g_free(prop);
}
ObjectProperty *
object_property_add_alias(Object *obj, const char *name,
Object *target_obj, const char *target_name)
{
AliasProperty *prop;
ObjectProperty *op;
ObjectProperty *target_prop;
g_autofree char *prop_type = NULL;
target_prop = object_property_find(target_obj, target_name,
&error_abort);
if (object_property_is_child(target_prop)) {
prop_type = g_strdup_printf("link%s",
target_prop->type + strlen("child"));
} else {
prop_type = g_strdup(target_prop->type);
}
prop = g_malloc(sizeof(*prop));
prop->target_obj = target_obj;
prop->target_name = g_strdup(target_name);
op = object_property_add(obj, name, prop_type,
property_get_alias,
property_set_alias,
property_release_alias,
prop);
op->resolve = property_resolve_alias;
if (target_prop->defval) {
op->defval = qobject_ref(target_prop->defval);
}
object_property_set_description(obj, op->name,
target_prop->description);
return op;
}
void object_property_set_description(Object *obj, const char *name,
const char *description)
{
ObjectProperty *op;
op = object_property_find(obj, name, &error_abort);
g_free(op->description);
op->description = g_strdup(description);
}
void object_class_property_set_description(ObjectClass *klass,
const char *name,
const char *description)
{
ObjectProperty *op;
op = g_hash_table_lookup(klass->properties, name);
g_free(op->description);
op->description = g_strdup(description);
}
static void object_class_init(ObjectClass *klass, void *data)
{
object_class_property_add_str(klass, "type", object_get_type,
NULL);
}
static void register_types(void)
{
static TypeInfo interface_info = {
.name = TYPE_INTERFACE,
.class_size = sizeof(InterfaceClass),
.abstract = true,
};
static TypeInfo object_info = {
.name = TYPE_OBJECT,
.instance_size = sizeof(Object),
.class_init = object_class_init,
.abstract = true,
};
type_interface = type_register_internal(&interface_info);
type_register_internal(&object_info);
}
type_init(register_types)
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