qom/object.c

   1 /*
   2  * QEMU Object Model
   3  *
   4  * Copyright IBM, Corp. 2011
   5  *
   6  * Authors:
   7  *  Anthony Liguori   <aliguori@us.ibm.com>
   8  *
   9  * This work is licensed under the terms of the GNU GPL, version 2 or later.
  10  * See the COPYING file in the top-level directory.
  11  */
  12
  13 #include "qom/object.h"
  14 #include "qemu-common.h"
  15 #include "qapi/visitor.h"
  16 #include "qapi-visit.h"
  17 #include "qapi/string-input-visitor.h"
  18 #include "qapi/string-output-visitor.h"
  19 #include "qapi/qmp/qerror.h"
  20 #include "trace.h"
  21
  22 /* TODO: replace QObject with a simpler visitor to avoid a dependency
  23  * of the QOM core on QObject?  */
  24 #include "qom/qom-qobject.h"
  25 #include "qapi/qmp/qobject.h"
  26 #include "qapi/qmp/qbool.h"
  27 #include "qapi/qmp/qint.h"
  28 #include "qapi/qmp/qstring.h"
  29
  30 #define MAX_INTERFACES 32
  31
  32 typedef struct InterfaceImpl InterfaceImpl;
  33 typedef struct TypeImpl TypeImpl;
  34
  35 struct InterfaceImpl
  36 {
  37     const char *typename;
  38 };
  39
  40 struct TypeImpl
  41 {
  42     const char *name;
  43
  44     size_t class_size;
  45
  46     size_t instance_size;
  47
  48     void (*class_init)(ObjectClass *klass, void *data);
  49     void (*class_base_init)(ObjectClass *klass, void *data);
  50     void (*class_finalize)(ObjectClass *klass, void *data);
  51
  52     void *class_data;
  53
  54     void (*instance_init)(Object *obj);
  55     void (*instance_post_init)(Object *obj);
  56     void (*instance_finalize)(Object *obj);
  57
  58     bool abstract;
  59
  60     const char *parent;
  61     TypeImpl *parent_type;
  62
  63     ObjectClass *class;
  64
  65     int num_interfaces;
  66     InterfaceImpl interfaces[MAX_INTERFACES];
  67 };
  68
  69 static Type type_interface;
  70
  71 static GHashTable *type_table_get(void)
  72 {
  73     static GHashTable *type_table;
  74
  75     if (type_table == NULL) {
  76         type_table = g_hash_table_new(g_str_hash, g_str_equal);
  77     }
  78
  79     return type_table;
  80 }
  81
  82 static bool enumerating_types;
  83
  84 static void type_table_add(TypeImpl *ti)
  85 {
  86     assert(!enumerating_types);
  87     g_hash_table_insert(type_table_get(), (void *)ti->name, ti);
  88 }
  89
  90 static TypeImpl *type_table_lookup(const char *name)
  91 {
  92     return g_hash_table_lookup(type_table_get(), name);
  93 }
  94
  95 static TypeImpl *type_new(const TypeInfo *info)
  96 {
  97     TypeImpl *ti = g_malloc0(sizeof(*ti));
  98     int i;
  99
 100     g_assert(info->name != NULL);
 101
 102     if (type_table_lookup(info->name) != NULL) {
 103         fprintf(stderr, "Registering `%s' which already exists\n", info->name);
 104         abort();
 105     }
 106
 107     ti->name = g_strdup(info->name);
 108     ti->parent = g_strdup(info->parent);
 109
 110     ti->class_size = info->class_size;
 111     ti->instance_size = info->instance_size;
 112
 113     ti->class_init = info->class_init;
 114     ti->class_base_init = info->class_base_init;
 115     ti->class_finalize = info->class_finalize;
 116     ti->class_data = info->class_data;
 117
 118     ti->instance_init = info->instance_init;
 119     ti->instance_post_init = info->instance_post_init;
 120     ti->instance_finalize = info->instance_finalize;
 121
 122     ti->abstract = info->abstract;
 123
 124     for (i = 0; info->interfaces && info->interfaces[i].type; i++) {
 125         ti->interfaces[i].typename = g_strdup(info->interfaces[i].type);
 126     }
 127     ti->num_interfaces = i;
 128
 129     return ti;
 130 }
 131
 132 static TypeImpl *type_register_internal(const TypeInfo *info)
 133 {
 134     TypeImpl *ti;
 135     ti = type_new(info);
 136
 137     type_table_add(ti);
 138     return ti;
 139 }
 140
 141 TypeImpl *type_register(const TypeInfo *info)
 142 {
 143     assert(info->parent);
 144     return type_register_internal(info);
 145 }
 146
 147 TypeImpl *type_register_static(const TypeInfo *info)
 148 {
 149     return type_register(info);
 150 }
 151
 152 static TypeImpl *type_get_by_name(const char *name)
 153 {
 154     if (name == NULL) {
 155         return NULL;
 156     }
 157
 158     return type_table_lookup(name);
 159 }
 160
 161 static TypeImpl *type_get_parent(TypeImpl *type)
 162 {
 163     if (!type->parent_type && type->parent) {
 164         type->parent_type = type_get_by_name(type->parent);
 165         g_assert(type->parent_type != NULL);
 166     }
 167
 168     return type->parent_type;
 169 }
 170
 171 static bool type_has_parent(TypeImpl *type)
 172 {
 173     return (type->parent != NULL);
 174 }
 175
 176 static size_t type_class_get_size(TypeImpl *ti)
 177 {
 178     if (ti->class_size) {
 179         return ti->class_size;
 180     }
 181
 182     if (type_has_parent(ti)) {
 183         return type_class_get_size(type_get_parent(ti));
 184     }
 185
 186     return sizeof(ObjectClass);
 187 }
 188
 189 static size_t type_object_get_size(TypeImpl *ti)
 190 {
 191     if (ti->instance_size) {
 192         return ti->instance_size;
 193     }
 194
 195     if (type_has_parent(ti)) {
 196         return type_object_get_size(type_get_parent(ti));
 197     }
 198
 199     return 0;
 200 }
 201
 202 static bool type_is_ancestor(TypeImpl *type, TypeImpl *target_type)
 203 {
 204     assert(target_type);
 205
 206     /* Check if typename is a direct ancestor of type */
 207     while (type) {
 208         if (type == target_type) {
 209             return true;
 210         }
 211
 212         type = type_get_parent(type);
 213     }
 214
 215     return false;
 216 }
 217
 218 static void type_initialize(TypeImpl *ti);
 219
 220 static void type_initialize_interface(TypeImpl *ti, TypeImpl *interface_type,
 221                                       TypeImpl *parent_type)
 222 {
 223     InterfaceClass *new_iface;
 224     TypeInfo info = { };
 225     TypeImpl *iface_impl;
 226
 227     info.parent = parent_type->name;
 228     info.name = g_strdup_printf("%s::%s", ti->name, interface_type->name);
 229     info.abstract = true;
 230
 231     iface_impl = type_new(&info);
 232     iface_impl->parent_type = parent_type;
 233     type_initialize(iface_impl);
 234     g_free((char *)info.name);
 235
 236     new_iface = (InterfaceClass *)iface_impl->class;
 237     new_iface->concrete_class = ti->class;
 238     new_iface->interface_type = interface_type;
 239
 240     ti->class->interfaces = g_slist_append(ti->class->interfaces,
 241                                            iface_impl->class);
 242 }
 243
 244 static void type_initialize(TypeImpl *ti)
 245 {
 246     TypeImpl *parent;
 247
 248     if (ti->class) {
 249         return;
 250     }
 251
 252     ti->class_size = type_class_get_size(ti);
 253     ti->instance_size = type_object_get_size(ti);
 254
 255     ti->class = g_malloc0(ti->class_size);
 256
 257     parent = type_get_parent(ti);
 258     if (parent) {
 259         type_initialize(parent);
 260         GSList *e;
 261         int i;
 262
 263         g_assert(parent->class_size <= ti->class_size);
 264         memcpy(ti->class, parent->class, parent->class_size);
 265         ti->class->interfaces = NULL;
 266
 267         for (e = parent->class->interfaces; e; e = e->next) {
 268             InterfaceClass *iface = e->data;
 269             ObjectClass *klass = OBJECT_CLASS(iface);
 270
 271             type_initialize_interface(ti, iface->interface_type, klass->type);
 272         }
 273
 274         for (i = 0; i < ti->num_interfaces; i++) {
 275             TypeImpl *t = type_get_by_name(ti->interfaces[i].typename);
 276             for (e = ti->class->interfaces; e; e = e->next) {
 277                 TypeImpl *target_type = OBJECT_CLASS(e->data)->type;
 278
 279                 if (type_is_ancestor(target_type, t)) {
 280                     break;
 281                 }
 282             }
 283
 284             if (e) {
 285                 continue;
 286             }
 287
 288             type_initialize_interface(ti, t, t);
 289         }
 290     }
 291
 292     ti->class->type = ti;
 293
 294     while (parent) {
 295         if (parent->class_base_init) {
 296             parent->class_base_init(ti->class, ti->class_data);
 297         }
 298         parent = type_get_parent(parent);
 299     }
 300
 301     if (ti->class_init) {
 302         ti->class_init(ti->class, ti->class_data);
 303     }
 304 }
 305
 306 static void object_init_with_type(Object *obj, TypeImpl *ti)
 307 {
 308     if (type_has_parent(ti)) {
 309         object_init_with_type(obj, type_get_parent(ti));
 310     }
 311
 312     if (ti->instance_init) {
 313         ti->instance_init(obj);
 314     }
 315 }
 316
 317 static void object_post_init_with_type(Object *obj, TypeImpl *ti)
 318 {
 319     if (ti->instance_post_init) {
 320         ti->instance_post_init(obj);
 321     }
 322
 323     if (type_has_parent(ti)) {
 324         object_post_init_with_type(obj, type_get_parent(ti));
 325     }
 326 }
 327
 328 void object_initialize_with_type(void *data, size_t size, TypeImpl *type)
 329 {
 330     Object *obj = data;
 331
 332     g_assert(type != NULL);
 333     type_initialize(type);
 334
 335     g_assert(type->instance_size >= sizeof(Object));
 336     g_assert(type->abstract == false);
 337     g_assert(size >= type->instance_size);
 338
 339     memset(obj, 0, type->instance_size);
 340     obj->class = type->class;
 341     object_ref(obj);
 342     QTAILQ_INIT(&obj->properties);
 343     object_init_with_type(obj, type);
 344     object_post_init_with_type(obj, type);
 345 }
 346
 347 void object_initialize(void *data, size_t size, const char *typename)
 348 {
 349     TypeImpl *type = type_get_by_name(typename);
 350
 351     object_initialize_with_type(data, size, type);
 352 }
 353
 354 static inline bool object_property_is_child(ObjectProperty *prop)
 355 {
 356     return strstart(prop->type, "child<", NULL);
 357 }
 358
 359 static void object_property_del_all(Object *obj)
 360 {
 361     while (!QTAILQ_EMPTY(&obj->properties)) {
 362         ObjectProperty *prop = QTAILQ_FIRST(&obj->properties);
 363
 364         QTAILQ_REMOVE(&obj->properties, prop, node);
 365
 366         if (prop->release) {
 367             prop->release(obj, prop->name, prop->opaque);
 368         }
 369
 370         g_free(prop->name);
 371         g_free(prop->type);
 372         g_free(prop);
 373     }
 374 }
 375
 376 static void object_property_del_child(Object *obj, Object *child, Error **errp)
 377 {
 378     ObjectProperty *prop;
 379
 380     QTAILQ_FOREACH(prop, &obj->properties, node) {
 381         if (object_property_is_child(prop) && prop->opaque == child) {
 382             object_property_del(obj, prop->name, errp);
 383             break;
 384         }
 385     }
 386 }
 387
 388 void object_unparent(Object *obj)
 389 {
 390     if (obj->parent) {
 391         object_property_del_child(obj->parent, obj, NULL);
 392     }
 393 }
 394
 395 static void object_deinit(Object *obj, TypeImpl *type)
 396 {
 397     if (type->instance_finalize) {
 398         type->instance_finalize(obj);
 399     }
 400
 401     if (type_has_parent(type)) {
 402         object_deinit(obj, type_get_parent(type));
 403     }
 404 }
 405
 406 static void object_finalize(void *data)
 407 {
 408     Object *obj = data;
 409     TypeImpl *ti = obj->class->type;
 410
 411     object_property_del_all(obj);
 412     object_deinit(obj, ti);
 413
 414     g_assert(obj->ref == 0);
 415     if (obj->free) {
 416         obj->free(obj);
 417     }
 418 }
 419
 420 Object *object_new_with_type(Type type)
 421 {
 422     Object *obj;
 423
 424     g_assert(type != NULL);
 425     type_initialize(type);
 426
 427     obj = g_malloc(type->instance_size);
 428     object_initialize_with_type(obj, type->instance_size, type);
 429     obj->free = g_free;
 430
 431     return obj;
 432 }
 433
 434 Object *object_new(const char *typename)
 435 {
 436     TypeImpl *ti = type_get_by_name(typename);
 437
 438     return object_new_with_type(ti);
 439 }
 440
 441 Object *object_dynamic_cast(Object *obj, const char *typename)
 442 {
 443     if (obj && object_class_dynamic_cast(object_get_class(obj), typename)) {
 444         return obj;
 445     }
 446
 447     return NULL;
 448 }
 449
 450 Object *object_dynamic_cast_assert(Object *obj, const char *typename,
 451                                    const char *file, int line, const char *func)
 452 {
 453     trace_object_dynamic_cast_assert(obj ? obj->class->type->name : "(null)",
 454                                      typename, file, line, func);
 455
 456 #ifdef CONFIG_QOM_CAST_DEBUG
 457     int i;
 458     Object *inst;
 459
 460     for (i = 0; obj && i < OBJECT_CLASS_CAST_CACHE; i++) {
 461         if (obj->class->object_cast_cache[i] == typename) {
 462             goto out;
 463         }
 464     }
 465
 466     inst = object_dynamic_cast(obj, typename);
 467
 468     if (!inst && obj) {
 469         fprintf(stderr, "%s:%d:%s: Object %p is not an instance of type %s\n",
 470                 file, line, func, obj, typename);
 471         abort();
 472     }
 473
 474     assert(obj == inst);
 475
 476     if (obj && obj == inst) {
 477         for (i = 1; i < OBJECT_CLASS_CAST_CACHE; i++) {
 478             obj->class->object_cast_cache[i - 1] =
 479                     obj->class->object_cast_cache[i];
 480         }
 481         obj->class->object_cast_cache[i - 1] = typename;
 482     }
 483
 484 out:
 485 #endif
 486     return obj;
 487 }
 488
 489 ObjectClass *object_class_dynamic_cast(ObjectClass *class,
 490                                        const char *typename)
 491 {
 492     ObjectClass *ret = NULL;
 493     TypeImpl *target_type;
 494     TypeImpl *type;
 495
 496     if (!class) {
 497         return NULL;
 498     }
 499
 500     /* A simple fast path that can trigger a lot for leaf classes.  */
 501     type = class->type;
 502     if (type->name == typename) {
 503         return class;
 504     }
 505
 506     target_type = type_get_by_name(typename);
 507     if (!target_type) {
 508         /* target class type unknown, so fail the cast */
 509         return NULL;
 510     }
 511
 512     if (type->class->interfaces &&
 513             type_is_ancestor(target_type, type_interface)) {
 514         int found = 0;
 515         GSList *i;
 516
 517         for (i = class->interfaces; i; i = i->next) {
 518             ObjectClass *target_class = i->data;
 519
 520             if (type_is_ancestor(target_class->type, target_type)) {
 521                 ret = target_class;
 522                 found++;
 523             }
 524          }
 525
 526         /* The match was ambiguous, don't allow a cast */
 527         if (found > 1) {
 528             ret = NULL;
 529         }
 530     } else if (type_is_ancestor(type, target_type)) {
 531         ret = class;
 532     }
 533
 534     return ret;
 535 }
 536
 537 ObjectClass *object_class_dynamic_cast_assert(ObjectClass *class,
 538                                               const char *typename,
 539                                               const char *file, int line,
 540                                               const char *func)
 541 {
 542     ObjectClass *ret;
 543
 544     trace_object_class_dynamic_cast_assert(class ? class->type->name : "(null)",
 545                                            typename, file, line, func);
 546
 547 #ifdef CONFIG_QOM_CAST_DEBUG
 548     int i;
 549
 550     for (i = 0; class && i < OBJECT_CLASS_CAST_CACHE; i++) {
 551         if (class->class_cast_cache[i] == typename) {
 552             ret = class;
 553             goto out;
 554         }
 555     }
 556 #else
 557     if (!class || !class->interfaces) {
 558         return class;
 559     }
 560 #endif
 561
 562     ret = object_class_dynamic_cast(class, typename);
 563     if (!ret && class) {
 564         fprintf(stderr, "%s:%d:%s: Object %p is not an instance of type %s\n",
 565                 file, line, func, class, typename);
 566         abort();
 567     }
 568
 569 #ifdef CONFIG_QOM_CAST_DEBUG
 570     if (class && ret == class) {
 571         for (i = 1; i < OBJECT_CLASS_CAST_CACHE; i++) {
 572             class->class_cast_cache[i - 1] = class->class_cast_cache[i];
 573         }
 574         class->class_cast_cache[i - 1] = typename;
 575     }
 576 out:
 577 #endif
 578     return ret;
 579 }
 580
 581 const char *object_get_typename(Object *obj)
 582 {
 583     return obj->class->type->name;
 584 }
 585
 586 ObjectClass *object_get_class(Object *obj)
 587 {
 588     return obj->class;
 589 }
 590
 591 bool object_class_is_abstract(ObjectClass *klass)
 592 {
 593     return klass->type->abstract;
 594 }
 595
 596 const char *object_class_get_name(ObjectClass *klass)
 597 {
 598     return klass->type->name;
 599 }
 600
 601 ObjectClass *object_class_by_name(const char *typename)
 602 {
 603     TypeImpl *type = type_get_by_name(typename);
 604
 605     if (!type) {
 606         return NULL;
 607     }
 608
 609     type_initialize(type);
 610
 611     return type->class;
 612 }
 613
 614 ObjectClass *object_class_get_parent(ObjectClass *class)
 615 {
 616     TypeImpl *type = type_get_parent(class->type);
 617
 618     if (!type) {
 619         return NULL;
 620     }
 621
 622     type_initialize(type);
 623
 624     return type->class;
 625 }
 626
 627 typedef struct OCFData
 628 {
 629     void (*fn)(ObjectClass *klass, void *opaque);
 630     const char *implements_type;
 631     bool include_abstract;
 632     void *opaque;
 633 } OCFData;
 634
 635 static void object_class_foreach_tramp(gpointer key, gpointer value,
 636                                        gpointer opaque)
 637 {
 638     OCFData *data = opaque;
 639     TypeImpl *type = value;
 640     ObjectClass *k;
 641
 642     type_initialize(type);
 643     k = type->class;
 644
 645     if (!data->include_abstract && type->abstract) {
 646         return;
 647     }
 648
 649     if (data->implements_type &&
 650         !object_class_dynamic_cast(k, data->implements_type)) {
 651         return;
 652     }
 653
 654     data->fn(k, data->opaque);
 655 }
 656
 657 void object_class_foreach(void (*fn)(ObjectClass *klass, void *opaque),
 658                           const char *implements_type, bool include_abstract,
 659                           void *opaque)
 660 {
 661     OCFData data = { fn, implements_type, include_abstract, opaque };
 662
 663     enumerating_types = true;
 664     g_hash_table_foreach(type_table_get(), object_class_foreach_tramp, &data);
 665     enumerating_types = false;
 666 }
 667
 668 int object_child_foreach(Object *obj, int (*fn)(Object *child, void *opaque),
 669                          void *opaque)
 670 {
 671     ObjectProperty *prop;
 672     int ret = 0;
 673
 674     QTAILQ_FOREACH(prop, &obj->properties, node) {
 675         if (object_property_is_child(prop)) {
 676             ret = fn(prop->opaque, opaque);
 677             if (ret != 0) {
 678                 break;
 679             }
 680         }
 681     }
 682     return ret;
 683 }
 684
 685 static void object_class_get_list_tramp(ObjectClass *klass, void *opaque)
 686 {
 687     GSList **list = opaque;
 688
 689     *list = g_slist_prepend(*list, klass);
 690 }
 691
 692 GSList *object_class_get_list(const char *implements_type,
 693                               bool include_abstract)
 694 {
 695     GSList *list = NULL;
 696
 697     object_class_foreach(object_class_get_list_tramp,
 698                          implements_type, include_abstract, &list);
 699     return list;
 700 }
 701
 702 void object_ref(Object *obj)
 703 {
 704     if (!obj) {
 705         return;
 706     }
 707      atomic_inc(&obj->ref);
 708 }
 709
 710 void object_unref(Object *obj)
 711 {
 712     if (!obj) {
 713         return;
 714     }
 715     g_assert(obj->ref > 0);
 716
 717     /* parent always holds a reference to its children */
 718     if (atomic_fetch_dec(&obj->ref) == 1) {
 719         object_finalize(obj);
 720     }
 721 }
 722
 723 ObjectProperty *
 724 object_property_add(Object *obj, const char *name, const char *type,
 725                     ObjectPropertyAccessor *get,
 726                     ObjectPropertyAccessor *set,
 727                     ObjectPropertyRelease *release,
 728                     void *opaque, Error **errp)
 729 {
 730     ObjectProperty *prop;
 731
 732     QTAILQ_FOREACH(prop, &obj->properties, node) {
 733         if (strcmp(prop->name, name) == 0) {
 734             error_setg(errp, "attempt to add duplicate property '%s'"
 735                        " to object (type '%s')", name,
 736                        object_get_typename(obj));
 737             return NULL;
 738         }
 739     }
 740
 741     prop = g_malloc0(sizeof(*prop));
 742
 743     prop->name = g_strdup(name);
 744     prop->type = g_strdup(type);
 745
 746     prop->get = get;
 747     prop->set = set;
 748     prop->release = release;
 749     prop->opaque = opaque;
 750
 751     QTAILQ_INSERT_TAIL(&obj->properties, prop, node);
 752     return prop;
 753 }
 754
 755 ObjectProperty *object_property_find(Object *obj, const char *name,
 756                                      Error **errp)
 757 {
 758     ObjectProperty *prop;
 759
 760     QTAILQ_FOREACH(prop, &obj->properties, node) {
 761         if (strcmp(prop->name, name) == 0) {
 762             return prop;
 763         }
 764     }
 765
 766     error_setg(errp, "Property '.%s' not found", name);
 767     return NULL;
 768 }
 769
 770 void object_property_del(Object *obj, const char *name, Error **errp)
 771 {
 772     ObjectProperty *prop = object_property_find(obj, name, errp);
 773     if (prop == NULL) {
 774         return;
 775     }
 776
 777     if (prop->release) {
 778         prop->release(obj, name, prop->opaque);
 779     }
 780
 781     QTAILQ_REMOVE(&obj->properties, prop, node);
 782
 783     g_free(prop->name);
 784     g_free(prop->type);
 785     g_free(prop);
 786 }
 787
 788 void object_property_get(Object *obj, Visitor *v, const char *name,
 789                          Error **errp)
 790 {
 791     ObjectProperty *prop = object_property_find(obj, name, errp);
 792     if (prop == NULL) {
 793         return;
 794     }
 795
 796     if (!prop->get) {
 797         error_set(errp, QERR_PERMISSION_DENIED);
 798     } else {
 799         prop->get(obj, v, prop->opaque, name, errp);
 800     }
 801 }
 802
 803 void object_property_set(Object *obj, Visitor *v, const char *name,
 804                          Error **errp)
 805 {
 806     ObjectProperty *prop = object_property_find(obj, name, errp);
 807     if (prop == NULL) {
 808         return;
 809     }
 810
 811     if (!prop->set) {
 812         error_set(errp, QERR_PERMISSION_DENIED);
 813     } else {
 814         prop->set(obj, v, prop->opaque, name, errp);
 815     }
 816 }
 817
 818 void object_property_set_str(Object *obj, const char *value,
 819                              const char *name, Error **errp)
 820 {
 821     QString *qstr = qstring_from_str(value);
 822     object_property_set_qobject(obj, QOBJECT(qstr), name, errp);
 823
 824     QDECREF(qstr);
 825 }
 826
 827 char *object_property_get_str(Object *obj, const char *name,
 828                               Error **errp)
 829 {
 830     QObject *ret = object_property_get_qobject(obj, name, errp);
 831     QString *qstring;
 832     char *retval;
 833
 834     if (!ret) {
 835         return NULL;
 836     }
 837     qstring = qobject_to_qstring(ret);
 838     if (!qstring) {
 839         error_set(errp, QERR_INVALID_PARAMETER_TYPE, name, "string");
 840         retval = NULL;
 841     } else {
 842         retval = g_strdup(qstring_get_str(qstring));
 843     }
 844
 845     QDECREF(qstring);
 846     return retval;
 847 }
 848
 849 void object_property_set_link(Object *obj, Object *value,
 850                               const char *name, Error **errp)
 851 {
 852     gchar *path = object_get_canonical_path(value);
 853     object_property_set_str(obj, path, name, errp);
 854     g_free(path);
 855 }
 856
 857 Object *object_property_get_link(Object *obj, const char *name,
 858                                  Error **errp)
 859 {
 860     char *str = object_property_get_str(obj, name, errp);
 861     Object *target = NULL;
 862
 863     if (str && *str) {
 864         target = object_resolve_path(str, NULL);
 865         if (!target) {
 866             error_set(errp, QERR_DEVICE_NOT_FOUND, str);
 867         }
 868     }
 869
 870     g_free(str);
 871     return target;
 872 }
 873
 874 void object_property_set_bool(Object *obj, bool value,
 875                               const char *name, Error **errp)
 876 {
 877     QBool *qbool = qbool_from_int(value);
 878     object_property_set_qobject(obj, QOBJECT(qbool), name, errp);
 879
 880     QDECREF(qbool);
 881 }
 882
 883 bool object_property_get_bool(Object *obj, const char *name,
 884                               Error **errp)
 885 {
 886     QObject *ret = object_property_get_qobject(obj, name, errp);
 887     QBool *qbool;
 888     bool retval;
 889
 890     if (!ret) {
 891         return false;
 892     }
 893     qbool = qobject_to_qbool(ret);
 894     if (!qbool) {
 895         error_set(errp, QERR_INVALID_PARAMETER_TYPE, name, "boolean");
 896         retval = false;
 897     } else {
 898         retval = qbool_get_int(qbool);
 899     }
 900
 901     QDECREF(qbool);
 902     return retval;
 903 }
 904
 905 void object_property_set_int(Object *obj, int64_t value,
 906                              const char *name, Error **errp)
 907 {
 908     QInt *qint = qint_from_int(value);
 909     object_property_set_qobject(obj, QOBJECT(qint), name, errp);
 910
 911     QDECREF(qint);
 912 }
 913
 914 int64_t object_property_get_int(Object *obj, const char *name,
 915                                 Error **errp)
 916 {
 917     QObject *ret = object_property_get_qobject(obj, name, errp);
 918     QInt *qint;
 919     int64_t retval;
 920
 921     if (!ret) {
 922         return -1;
 923     }
 924     qint = qobject_to_qint(ret);
 925     if (!qint) {
 926         error_set(errp, QERR_INVALID_PARAMETER_TYPE, name, "int");
 927         retval = -1;
 928     } else {
 929         retval = qint_get_int(qint);
 930     }
 931
 932     QDECREF(qint);
 933     return retval;
 934 }
 935
 936 int object_property_get_enum(Object *obj, const char *name,
 937                              const char *strings[], Error **errp)
 938 {
 939     StringOutputVisitor *sov;
 940     StringInputVisitor *siv;
 941     int ret;
 942
 943     sov = string_output_visitor_new(false);
 944     object_property_get(obj, string_output_get_visitor(sov), name, errp);
 945     siv = string_input_visitor_new(string_output_get_string(sov));
 946     string_output_visitor_cleanup(sov);
 947     visit_type_enum(string_input_get_visitor(siv),
 948                     &ret, strings, NULL, name, errp);
 949     string_input_visitor_cleanup(siv);
 950
 951     return ret;
 952 }
 953
 954 void object_property_get_uint16List(Object *obj, const char *name,
 955                                     uint16List **list, Error **errp)
 956 {
 957     StringOutputVisitor *ov;
 958     StringInputVisitor *iv;
 959
 960     ov = string_output_visitor_new(false);
 961     object_property_get(obj, string_output_get_visitor(ov),
 962                         name, errp);
 963     iv = string_input_visitor_new(string_output_get_string(ov));
 964     visit_type_uint16List(string_input_get_visitor(iv),
 965                           list, NULL, errp);
 966     string_output_visitor_cleanup(ov);
 967     string_input_visitor_cleanup(iv);
 968 }
 969
 970 void object_property_parse(Object *obj, const char *string,
 971                            const char *name, Error **errp)
 972 {
 973     StringInputVisitor *mi;
 974     mi = string_input_visitor_new(string);
 975     object_property_set(obj, string_input_get_visitor(mi), name, errp);
 976
 977     string_input_visitor_cleanup(mi);
 978 }
 979
 980 char *object_property_print(Object *obj, const char *name, bool human,
 981                             Error **errp)
 982 {
 983     StringOutputVisitor *mo;
 984     char *string;
 985
 986     mo = string_output_visitor_new(human);
 987     object_property_get(obj, string_output_get_visitor(mo), name, errp);
 988     string = string_output_get_string(mo);
 989     string_output_visitor_cleanup(mo);
 990     return string;
 991 }
 992
 993 const char *object_property_get_type(Object *obj, const char *name, Error **errp)
 994 {
 995     ObjectProperty *prop = object_property_find(obj, name, errp);
 996     if (prop == NULL) {
 997         return NULL;
 998     }
 999
1000     return prop->type;
1001 }
1002
1003 Object *object_get_root(void)
1004 {
1005     static Object *root;
1006
1007     if (!root) {
1008         root = object_new("container");
1009     }
1010
1011     return root;
1012 }
1013
1014 static void object_get_child_property(Object *obj, Visitor *v, void *opaque,
1015                                       const char *name, Error **errp)
1016 {
1017     Object *child = opaque;
1018     gchar *path;
1019
1020     path = object_get_canonical_path(child);
1021     visit_type_str(v, &path, name, errp);
1022     g_free(path);
1023 }
1024
1025 static Object *object_resolve_child_property(Object *parent, void *opaque, const gchar *part)
1026 {
1027     return opaque;
1028 }
1029
1030 static void object_finalize_child_property(Object *obj, const char *name,
1031                                            void *opaque)
1032 {
1033     Object *child = opaque;
1034
1035     if (child->class->unparent) {
1036         (child->class->unparent)(child);
1037     }
1038     child->parent = NULL;
1039     object_unref(child);
1040 }
1041
1042 void object_property_add_child(Object *obj, const char *name,
1043                                Object *child, Error **errp)
1044 {
1045     Error *local_err = NULL;
1046     gchar *type;
1047     ObjectProperty *op;
1048
1049     type = g_strdup_printf("child<%s>", object_get_typename(OBJECT(child)));
1050
1051     op = object_property_add(obj, name, type, object_get_child_property, NULL,
1052                              object_finalize_child_property, child, &local_err);
1053     if (local_err) {
1054         error_propagate(errp, local_err);
1055         goto out;
1056     }
1057
1058     op->resolve = object_resolve_child_property;
1059     object_ref(child);
1060     g_assert(child->parent == NULL);
1061     child->parent = obj;
1062
1063 out:
1064     g_free(type);
1065 }
1066
1067 void object_property_allow_set_link(Object *obj, const char *name,
1068                                     Object *val, Error **errp)
1069 {
1070     /* Allow the link to be set, always */
1071 }
1072
1073 typedef struct {
1074     Object **child;
1075     void (*check)(Object *, const char *, Object *, Error **);
1076     ObjectPropertyLinkFlags flags;
1077 } LinkProperty;
1078
1079 static void object_get_link_property(Object *obj, Visitor *v, void *opaque,
1080                                      const char *name, Error **errp)
1081 {
1082     LinkProperty *lprop = opaque;
1083     Object **child = lprop->child;
1084     gchar *path;
1085
1086     if (*child) {
1087         path = object_get_canonical_path(*child);
1088         visit_type_str(v, &path, name, errp);
1089         g_free(path);
1090     } else {
1091         path = (gchar *)"";
1092         visit_type_str(v, &path, name, errp);
1093     }
1094 }
1095
1096 /*
1097  * object_resolve_link:
1098  *
1099  * Lookup an object and ensure its type matches the link property type.  This
1100  * is similar to object_resolve_path() except type verification against the
1101  * link property is performed.
1102  *
1103  * Returns: The matched object or NULL on path lookup failures.
1104  */
1105 static Object *object_resolve_link(Object *obj, const char *name,
1106                                    const char *path, Error **errp)
1107 {
1108     const char *type;
1109     gchar *target_type;
1110     bool ambiguous = false;
1111     Object *target;
1112
1113     /* Go from link<FOO> to FOO.  */
1114     type = object_property_get_type(obj, name, NULL);
1115     target_type = g_strndup(&type[5], strlen(type) - 6);
1116     target = object_resolve_path_type(path, target_type, &ambiguous);
1117
1118     if (ambiguous) {
1119         error_set(errp, ERROR_CLASS_GENERIC_ERROR,
1120                   "Path '%s' does not uniquely identify an object", path);
1121     } else if (!target) {
1122         target = object_resolve_path(path, &ambiguous);
1123         if (target || ambiguous) {
1124             error_set(errp, QERR_INVALID_PARAMETER_TYPE, name, target_type);
1125         } else {
1126             error_set(errp, QERR_DEVICE_NOT_FOUND, path);
1127         }
1128         target = NULL;
1129     }
1130     g_free(target_type);
1131
1132     return target;
1133 }
1134
1135 static void object_set_link_property(Object *obj, Visitor *v, void *opaque,
1136                                      const char *name, Error **errp)
1137 {
1138     Error *local_err = NULL;
1139     LinkProperty *prop = opaque;
1140     Object **child = prop->child;
1141     Object *old_target = *child;
1142     Object *new_target = NULL;
1143     char *path = NULL;
1144
1145     visit_type_str(v, &path, name, &local_err);
1146
1147     if (!local_err && strcmp(path, "") != 0) {
1148         new_target = object_resolve_link(obj, name, path, &local_err);
1149     }
1150
1151     g_free(path);
1152     if (local_err) {
1153         error_propagate(errp, local_err);
1154         return;
1155     }
1156
1157     prop->check(obj, name, new_target, &local_err);
1158     if (local_err) {
1159         error_propagate(errp, local_err);
1160         return;
1161     }
1162
1163     object_ref(new_target);
1164     *child = new_target;
1165     object_unref(old_target);
1166 }
1167
1168 static Object *object_resolve_link_property(Object *parent, void *opaque, const gchar *part)
1169 {
1170     LinkProperty *lprop = opaque;
1171
1172     return *lprop->child;
1173 }
1174
1175 static void object_release_link_property(Object *obj, const char *name,
1176                                          void *opaque)
1177 {
1178     LinkProperty *prop = opaque;
1179
1180     if ((prop->flags & OBJ_PROP_LINK_UNREF_ON_RELEASE) && *prop->child) {
1181         object_unref(*prop->child);
1182     }
1183     g_free(prop);
1184 }
1185
1186 void object_property_add_link(Object *obj, const char *name,
1187                               const char *type, Object **child,
1188                               void (*check)(Object *, const char *,
1189                                             Object *, Error **),
1190                               ObjectPropertyLinkFlags flags,
1191                               Error **errp)
1192 {
1193     Error *local_err = NULL;
1194     LinkProperty *prop = g_malloc(sizeof(*prop));
1195     gchar *full_type;
1196     ObjectProperty *op;
1197
1198     prop->child = child;
1199     prop->check = check;
1200     prop->flags = flags;
1201
1202     full_type = g_strdup_printf("link<%s>", type);
1203
1204     op = object_property_add(obj, name, full_type,
1205                              object_get_link_property,
1206                              check ? object_set_link_property : NULL,
1207                              object_release_link_property,
1208                              prop,
1209                              &local_err);
1210     if (local_err) {
1211         error_propagate(errp, local_err);
1212         g_free(prop);
1213         goto out;
1214     }
1215
1216     op->resolve = object_resolve_link_property;
1217
1218 out:
1219     g_free(full_type);
1220 }
1221
1222 gchar *object_get_canonical_path_component(Object *obj)
1223 {
1224     ObjectProperty *prop = NULL;
1225
1226     g_assert(obj);
1227     g_assert(obj->parent != NULL);
1228
1229     QTAILQ_FOREACH(prop, &obj->parent->properties, node) {
1230         if (!object_property_is_child(prop)) {
1231             continue;
1232         }
1233
1234         if (prop->opaque == obj) {
1235             return g_strdup(prop->name);
1236         }
1237     }
1238
1239     /* obj had a parent but was not a child, should never happen */
1240     g_assert_not_reached();
1241     return NULL;
1242 }
1243
1244 gchar *object_get_canonical_path(Object *obj)
1245 {
1246     Object *root = object_get_root();
1247     char *newpath, *path = NULL;
1248
1249     while (obj != root) {
1250         char *component = object_get_canonical_path_component(obj);
1251
1252         if (path) {
1253             newpath = g_strdup_printf("%s/%s", component, path);
1254             g_free(component);
1255             g_free(path);
1256             path = newpath;
1257         } else {
1258             path = component;
1259         }
1260
1261         obj = obj->parent;
1262     }
1263
1264     newpath = g_strdup_printf("/%s", path ? path : "");
1265     g_free(path);
1266
1267     return newpath;
1268 }
1269
1270 Object *object_resolve_path_component(Object *parent, const gchar *part)
1271 {
1272     ObjectProperty *prop = object_property_find(parent, part, NULL);
1273     if (prop == NULL) {
1274         return NULL;
1275     }
1276
1277     if (prop->resolve) {
1278         return prop->resolve(parent, prop->opaque, part);
1279     } else {
1280         return NULL;
1281     }
1282 }
1283
1284 static Object *object_resolve_abs_path(Object *parent,
1285                                           gchar **parts,
1286                                           const char *typename,
1287                                           int index)
1288 {
1289     Object *child;
1290
1291     if (parts[index] == NULL) {
1292         return object_dynamic_cast(parent, typename);
1293     }
1294
1295     if (strcmp(parts[index], "") == 0) {
1296         return object_resolve_abs_path(parent, parts, typename, index + 1);
1297     }
1298
1299     child = object_resolve_path_component(parent, parts[index]);
1300     if (!child) {
1301         return NULL;
1302     }
1303
1304     return object_resolve_abs_path(child, parts, typename, index + 1);
1305 }
1306
1307 static Object *object_resolve_partial_path(Object *parent,
1308                                               gchar **parts,
1309                                               const char *typename,
1310                                               bool *ambiguous)
1311 {
1312     Object *obj;
1313     ObjectProperty *prop;
1314
1315     obj = object_resolve_abs_path(parent, parts, typename, 0);
1316
1317     QTAILQ_FOREACH(prop, &parent->properties, node) {
1318         Object *found;
1319
1320         if (!object_property_is_child(prop)) {
1321             continue;
1322         }
1323
1324         found = object_resolve_partial_path(prop->opaque, parts,
1325                                             typename, ambiguous);
1326         if (found) {
1327             if (obj) {
1328                 if (ambiguous) {
1329                     *ambiguous = true;
1330                 }
1331                 return NULL;
1332             }
1333             obj = found;
1334         }
1335
1336         if (ambiguous && *ambiguous) {
1337             return NULL;
1338         }
1339     }
1340
1341     return obj;
1342 }
1343
1344 Object *object_resolve_path_type(const char *path, const char *typename,
1345                                  bool *ambiguous)
1346 {
1347     Object *obj;
1348     gchar **parts;
1349
1350     parts = g_strsplit(path, "/", 0);
1351     assert(parts);
1352
1353     if (parts[0] == NULL || strcmp(parts[0], "") != 0) {
1354         if (ambiguous) {
1355             *ambiguous = false;
1356         }
1357         obj = object_resolve_partial_path(object_get_root(), parts,
1358                                           typename, ambiguous);
1359     } else {
1360         obj = object_resolve_abs_path(object_get_root(), parts, typename, 1);
1361     }
1362
1363     g_strfreev(parts);
1364
1365     return obj;
1366 }
1367
1368 Object *object_resolve_path(const char *path, bool *ambiguous)
1369 {
1370     return object_resolve_path_type(path, TYPE_OBJECT, ambiguous);
1371 }
1372
1373 typedef struct StringProperty
1374 {
1375     char *(*get)(Object *, Error **);
1376     void (*set)(Object *, const char *, Error **);
1377 } StringProperty;
1378
1379 static void property_get_str(Object *obj, Visitor *v, void *opaque,
1380                              const char *name, Error **errp)
1381 {
1382     StringProperty *prop = opaque;
1383     char *value;
1384
1385     value = prop->get(obj, errp);
1386     if (value) {
1387         visit_type_str(v, &value, name, errp);
1388         g_free(value);
1389     }
1390 }
1391
1392 static void property_set_str(Object *obj, Visitor *v, void *opaque,
1393                              const char *name, Error **errp)
1394 {
1395     StringProperty *prop = opaque;
1396     char *value;
1397     Error *local_err = NULL;
1398
1399     visit_type_str(v, &value, name, &local_err);
1400     if (local_err) {
1401         error_propagate(errp, local_err);
1402         return;
1403     }
1404
1405     prop->set(obj, value, errp);
1406     g_free(value);
1407 }
1408
1409 static void property_release_str(Object *obj, const char *name,
1410                                  void *opaque)
1411 {
1412     StringProperty *prop = opaque;
1413     g_free(prop);
1414 }
1415
1416 void object_property_add_str(Object *obj, const char *name,
1417                            char *(*get)(Object *, Error **),
1418                            void (*set)(Object *, const char *, Error **),
1419                            Error **errp)
1420 {
1421     Error *local_err = NULL;
1422     StringProperty *prop = g_malloc0(sizeof(*prop));
1423
1424     prop->get = get;
1425     prop->set = set;
1426
1427     object_property_add(obj, name, "string",
1428                         get ? property_get_str : NULL,
1429                         set ? property_set_str : NULL,
1430                         property_release_str,
1431                         prop, &local_err);
1432     if (local_err) {
1433         error_propagate(errp, local_err);
1434         g_free(prop);
1435     }
1436 }
1437
1438 typedef struct BoolProperty
1439 {
1440     bool (*get)(Object *, Error **);
1441     void (*set)(Object *, bool, Error **);
1442 } BoolProperty;
1443
1444 static void property_get_bool(Object *obj, Visitor *v, void *opaque,
1445                               const char *name, Error **errp)
1446 {
1447     BoolProperty *prop = opaque;
1448     bool value;
1449
1450     value = prop->get(obj, errp);
1451     visit_type_bool(v, &value, name, errp);
1452 }
1453
1454 static void property_set_bool(Object *obj, Visitor *v, void *opaque,
1455                               const char *name, Error **errp)
1456 {
1457     BoolProperty *prop = opaque;
1458     bool value;
1459     Error *local_err = NULL;
1460
1461     visit_type_bool(v, &value, name, &local_err);
1462     if (local_err) {
1463         error_propagate(errp, local_err);
1464         return;
1465     }
1466
1467     prop->set(obj, value, errp);
1468 }
1469
1470 static void property_release_bool(Object *obj, const char *name,
1471                                   void *opaque)
1472 {
1473     BoolProperty *prop = opaque;
1474     g_free(prop);
1475 }
1476
1477 void object_property_add_bool(Object *obj, const char *name,
1478                               bool (*get)(Object *, Error **),
1479                               void (*set)(Object *, bool, Error **),
1480                               Error **errp)
1481 {
1482     Error *local_err = NULL;
1483     BoolProperty *prop = g_malloc0(sizeof(*prop));
1484
1485     prop->get = get;
1486     prop->set = set;
1487
1488     object_property_add(obj, name, "bool",
1489                         get ? property_get_bool : NULL,
1490                         set ? property_set_bool : NULL,
1491                         property_release_bool,
1492                         prop, &local_err);
1493     if (local_err) {
1494         error_propagate(errp, local_err);
1495         g_free(prop);
1496     }
1497 }
1498
1499 static char *qdev_get_type(Object *obj, Error **errp)
1500 {
1501     return g_strdup(object_get_typename(obj));
1502 }
1503
1504 static void property_get_uint8_ptr(Object *obj, Visitor *v,
1505                                    void *opaque, const char *name,
1506                                    Error **errp)
1507 {
1508     uint8_t value = *(uint8_t *)opaque;
1509     visit_type_uint8(v, &value, name, errp);
1510 }
1511
1512 static void property_get_uint16_ptr(Object *obj, Visitor *v,
1513                                    void *opaque, const char *name,
1514                                    Error **errp)
1515 {
1516     uint16_t value = *(uint16_t *)opaque;
1517     visit_type_uint16(v, &value, name, errp);
1518 }
1519
1520 static void property_get_uint32_ptr(Object *obj, Visitor *v,
1521                                    void *opaque, const char *name,
1522                                    Error **errp)
1523 {
1524     uint32_t value = *(uint32_t *)opaque;
1525     visit_type_uint32(v, &value, name, errp);
1526 }
1527
1528 static void property_get_uint64_ptr(Object *obj, Visitor *v,
1529                                    void *opaque, const char *name,
1530                                    Error **errp)
1531 {
1532     uint64_t value = *(uint64_t *)opaque;
1533     visit_type_uint64(v, &value, name, errp);
1534 }
1535
1536 void object_property_add_uint8_ptr(Object *obj, const char *name,
1537                                    const uint8_t *v, Error **errp)
1538 {
1539     object_property_add(obj, name, "uint8", property_get_uint8_ptr,
1540                         NULL, NULL, (void *)v, errp);
1541 }
1542
1543 void object_property_add_uint16_ptr(Object *obj, const char *name,
1544                                     const uint16_t *v, Error **errp)
1545 {
1546     object_property_add(obj, name, "uint16", property_get_uint16_ptr,
1547                         NULL, NULL, (void *)v, errp);
1548 }
1549
1550 void object_property_add_uint32_ptr(Object *obj, const char *name,
1551                                     const uint32_t *v, Error **errp)
1552 {
1553     object_property_add(obj, name, "uint32", property_get_uint32_ptr,
1554                         NULL, NULL, (void *)v, errp);
1555 }
1556
1557 void object_property_add_uint64_ptr(Object *obj, const char *name,
1558                                     const uint64_t *v, Error **errp)
1559 {
1560     object_property_add(obj, name, "uint64", property_get_uint64_ptr,
1561                         NULL, NULL, (void *)v, errp);
1562 }
1563
1564 typedef struct {
1565     Object *target_obj;
1566     const char *target_name;
1567 } AliasProperty;
1568
1569 static void property_get_alias(Object *obj, struct Visitor *v, void *opaque,
1570                                const char *name, Error **errp)
1571 {
1572     AliasProperty *prop = opaque;
1573
1574     object_property_get(prop->target_obj, v, prop->target_name, errp);
1575 }
1576
1577 static void property_set_alias(Object *obj, struct Visitor *v, void *opaque,
1578                                const char *name, Error **errp)
1579 {
1580     AliasProperty *prop = opaque;
1581
1582     object_property_set(prop->target_obj, v, prop->target_name, errp);
1583 }
1584
1585 static Object *property_resolve_alias(Object *obj, void *opaque,
1586                                       const gchar *part)
1587 {
1588     AliasProperty *prop = opaque;
1589
1590     return object_resolve_path_component(prop->target_obj, prop->target_name);
1591 }
1592
1593 static void property_release_alias(Object *obj, const char *name, void *opaque)
1594 {
1595     AliasProperty *prop = opaque;
1596
1597     g_free(prop);
1598 }
1599
1600 void object_property_add_alias(Object *obj, const char *name,
1601                                Object *target_obj, const char *target_name,
1602                                Error **errp)
1603 {
1604     AliasProperty *prop;
1605     ObjectProperty *op;
1606     ObjectProperty *target_prop;
1607     gchar *prop_type;
1608
1609     target_prop = object_property_find(target_obj, target_name, errp);
1610     if (!target_prop) {
1611         return;
1612     }
1613
1614     if (object_property_is_child(target_prop)) {
1615         prop_type = g_strdup_printf("link%s",
1616                                     target_prop->type + strlen("child"));
1617     } else {
1618         prop_type = g_strdup(target_prop->type);
1619     }
1620
1621     prop = g_malloc(sizeof(*prop));
1622     prop->target_obj = target_obj;
1623     prop->target_name = target_name;
1624
1625     op = object_property_add(obj, name, prop_type,
1626                              property_get_alias,
1627                              property_set_alias,
1628                              property_release_alias,
1629                              prop, errp);
1630     op->resolve = property_resolve_alias;
1631
1632     g_free(prop_type);
1633 }
1634
1635 static void object_instance_init(Object *obj)
1636 {
1637     object_property_add_str(obj, "type", qdev_get_type, NULL, NULL);
1638 }
1639
1640 static void register_types(void)
1641 {
1642     static TypeInfo interface_info = {
1643         .name = TYPE_INTERFACE,
1644         .class_size = sizeof(InterfaceClass),
1645         .abstract = true,
1646     };
1647
1648     static TypeInfo object_info = {
1649         .name = TYPE_OBJECT,
1650         .instance_size = sizeof(Object),
1651         .instance_init = object_instance_init,
1652         .abstract = true,
1653     };
1654
1655     type_interface = type_register_internal(&interface_info);
1656     type_register_internal(&object_info);
1657 }
1658
1659 type_init(register_types)