Anthony Liguori | 2f28d2f | 2011-12-03 17:10:08 -0600 | [diff] [blame] | 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 "qemu/object.h" |
| 14 | #include "qemu-common.h" |
Anthony Liguori | 57c9faf | 2012-01-30 08:55:55 -0600 | [diff] [blame] | 15 | #include "qapi/qapi-visit-core.h" |
Paolo Bonzini | b2cd7de | 2012-02-09 09:52:59 +0100 | [diff] [blame] | 16 | #include "qapi/string-input-visitor.h" |
| 17 | #include "qapi/string-output-visitor.h" |
Anthony Liguori | 2f28d2f | 2011-12-03 17:10:08 -0600 | [diff] [blame] | 18 | |
Paolo Bonzini | 7b7b7d1 | 2012-02-01 17:16:22 +0100 | [diff] [blame] | 19 | /* TODO: replace QObject with a simpler visitor to avoid a dependency |
| 20 | * of the QOM core on QObject? */ |
| 21 | #include "qemu/qom-qobject.h" |
| 22 | #include "qobject.h" |
| 23 | #include "qbool.h" |
| 24 | #include "qint.h" |
| 25 | #include "qstring.h" |
| 26 | |
Anthony Liguori | 2f28d2f | 2011-12-03 17:10:08 -0600 | [diff] [blame] | 27 | #define MAX_INTERFACES 32 |
| 28 | |
| 29 | typedef struct InterfaceImpl InterfaceImpl; |
| 30 | typedef struct TypeImpl TypeImpl; |
| 31 | |
| 32 | struct InterfaceImpl |
| 33 | { |
| 34 | const char *parent; |
| 35 | void (*interface_initfn)(ObjectClass *class, void *data); |
| 36 | TypeImpl *type; |
| 37 | }; |
| 38 | |
| 39 | struct TypeImpl |
| 40 | { |
| 41 | const char *name; |
| 42 | |
| 43 | size_t class_size; |
| 44 | |
| 45 | size_t instance_size; |
| 46 | |
| 47 | void (*class_init)(ObjectClass *klass, void *data); |
| 48 | void (*class_finalize)(ObjectClass *klass, void *data); |
| 49 | |
| 50 | void *class_data; |
| 51 | |
| 52 | void (*instance_init)(Object *obj); |
| 53 | void (*instance_finalize)(Object *obj); |
| 54 | |
| 55 | bool abstract; |
| 56 | |
| 57 | const char *parent; |
| 58 | TypeImpl *parent_type; |
| 59 | |
| 60 | ObjectClass *class; |
| 61 | |
| 62 | int num_interfaces; |
| 63 | InterfaceImpl interfaces[MAX_INTERFACES]; |
| 64 | }; |
| 65 | |
| 66 | typedef struct Interface |
| 67 | { |
| 68 | Object parent; |
| 69 | Object *obj; |
| 70 | } Interface; |
| 71 | |
| 72 | #define INTERFACE(obj) OBJECT_CHECK(Interface, obj, TYPE_INTERFACE) |
| 73 | |
Paolo Bonzini | 9970bd8 | 2012-02-03 11:51:39 +0100 | [diff] [blame] | 74 | static Type type_interface; |
| 75 | |
Anthony Liguori | 2f28d2f | 2011-12-03 17:10:08 -0600 | [diff] [blame] | 76 | static GHashTable *type_table_get(void) |
| 77 | { |
| 78 | static GHashTable *type_table; |
| 79 | |
| 80 | if (type_table == NULL) { |
| 81 | type_table = g_hash_table_new(g_str_hash, g_str_equal); |
| 82 | } |
| 83 | |
| 84 | return type_table; |
| 85 | } |
| 86 | |
| 87 | static void type_table_add(TypeImpl *ti) |
| 88 | { |
| 89 | g_hash_table_insert(type_table_get(), (void *)ti->name, ti); |
| 90 | } |
| 91 | |
| 92 | static TypeImpl *type_table_lookup(const char *name) |
| 93 | { |
| 94 | return g_hash_table_lookup(type_table_get(), name); |
| 95 | } |
| 96 | |
| 97 | TypeImpl *type_register(const TypeInfo *info) |
| 98 | { |
| 99 | TypeImpl *ti = g_malloc0(sizeof(*ti)); |
| 100 | |
| 101 | g_assert(info->name != NULL); |
| 102 | |
Anthony Liguori | 7309335 | 2012-01-25 13:37:36 -0600 | [diff] [blame] | 103 | if (type_table_lookup(info->name) != NULL) { |
| 104 | fprintf(stderr, "Registering `%s' which already exists\n", info->name); |
| 105 | abort(); |
| 106 | } |
| 107 | |
Anthony Liguori | 2f28d2f | 2011-12-03 17:10:08 -0600 | [diff] [blame] | 108 | ti->name = g_strdup(info->name); |
| 109 | ti->parent = g_strdup(info->parent); |
| 110 | |
| 111 | ti->class_size = info->class_size; |
| 112 | ti->instance_size = info->instance_size; |
| 113 | |
| 114 | ti->class_init = info->class_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_finalize = info->instance_finalize; |
| 120 | |
| 121 | ti->abstract = info->abstract; |
| 122 | |
| 123 | if (info->interfaces) { |
| 124 | int i; |
| 125 | |
| 126 | for (i = 0; info->interfaces[i].type; i++) { |
| 127 | ti->interfaces[i].parent = info->interfaces[i].type; |
| 128 | ti->interfaces[i].interface_initfn = info->interfaces[i].interface_initfn; |
| 129 | ti->num_interfaces++; |
| 130 | } |
| 131 | } |
| 132 | |
| 133 | type_table_add(ti); |
| 134 | |
| 135 | return ti; |
| 136 | } |
| 137 | |
| 138 | TypeImpl *type_register_static(const TypeInfo *info) |
| 139 | { |
| 140 | return type_register(info); |
| 141 | } |
| 142 | |
| 143 | static TypeImpl *type_get_by_name(const char *name) |
| 144 | { |
| 145 | if (name == NULL) { |
| 146 | return NULL; |
| 147 | } |
| 148 | |
| 149 | return type_table_lookup(name); |
| 150 | } |
| 151 | |
| 152 | static TypeImpl *type_get_parent(TypeImpl *type) |
| 153 | { |
| 154 | if (!type->parent_type && type->parent) { |
| 155 | type->parent_type = type_get_by_name(type->parent); |
| 156 | g_assert(type->parent_type != NULL); |
| 157 | } |
| 158 | |
| 159 | return type->parent_type; |
| 160 | } |
| 161 | |
| 162 | static bool type_has_parent(TypeImpl *type) |
| 163 | { |
| 164 | return (type->parent != NULL); |
| 165 | } |
| 166 | |
| 167 | static size_t type_class_get_size(TypeImpl *ti) |
| 168 | { |
| 169 | if (ti->class_size) { |
| 170 | return ti->class_size; |
| 171 | } |
| 172 | |
| 173 | if (type_has_parent(ti)) { |
| 174 | return type_class_get_size(type_get_parent(ti)); |
| 175 | } |
| 176 | |
| 177 | return sizeof(ObjectClass); |
| 178 | } |
| 179 | |
Igor Mitsyanko | aca59af | 2012-02-28 15:57:10 +0400 | [diff] [blame^] | 180 | static size_t type_object_get_size(TypeImpl *ti) |
| 181 | { |
| 182 | if (ti->instance_size) { |
| 183 | return ti->instance_size; |
| 184 | } |
| 185 | |
| 186 | if (type_has_parent(ti)) { |
| 187 | return type_object_get_size(type_get_parent(ti)); |
| 188 | } |
| 189 | |
| 190 | return 0; |
| 191 | } |
| 192 | |
Anthony Liguori | 2f28d2f | 2011-12-03 17:10:08 -0600 | [diff] [blame] | 193 | static void type_class_interface_init(TypeImpl *ti, InterfaceImpl *iface) |
| 194 | { |
| 195 | TypeInfo info = { |
| 196 | .instance_size = sizeof(Interface), |
| 197 | .parent = iface->parent, |
| 198 | .class_size = sizeof(InterfaceClass), |
| 199 | .class_init = iface->interface_initfn, |
| 200 | .abstract = true, |
| 201 | }; |
| 202 | char *name = g_strdup_printf("<%s::%s>", ti->name, iface->parent); |
| 203 | |
| 204 | info.name = name; |
| 205 | iface->type = type_register(&info); |
| 206 | g_free(name); |
| 207 | } |
| 208 | |
| 209 | static void type_class_init(TypeImpl *ti) |
| 210 | { |
| 211 | size_t class_size = sizeof(ObjectClass); |
| 212 | int i; |
| 213 | |
| 214 | if (ti->class) { |
| 215 | return; |
| 216 | } |
| 217 | |
| 218 | ti->class_size = type_class_get_size(ti); |
Igor Mitsyanko | aca59af | 2012-02-28 15:57:10 +0400 | [diff] [blame^] | 219 | ti->instance_size = type_object_get_size(ti); |
Anthony Liguori | 2f28d2f | 2011-12-03 17:10:08 -0600 | [diff] [blame] | 220 | |
| 221 | ti->class = g_malloc0(ti->class_size); |
| 222 | ti->class->type = ti; |
| 223 | |
| 224 | if (type_has_parent(ti)) { |
| 225 | TypeImpl *parent = type_get_parent(ti); |
| 226 | |
| 227 | type_class_init(parent); |
| 228 | |
| 229 | class_size = parent->class_size; |
| 230 | g_assert(parent->class_size <= ti->class_size); |
| 231 | |
| 232 | memcpy((void *)ti->class + sizeof(ObjectClass), |
| 233 | (void *)parent->class + sizeof(ObjectClass), |
| 234 | parent->class_size - sizeof(ObjectClass)); |
| 235 | } |
| 236 | |
| 237 | memset((void *)ti->class + class_size, 0, ti->class_size - class_size); |
| 238 | |
| 239 | for (i = 0; i < ti->num_interfaces; i++) { |
| 240 | type_class_interface_init(ti, &ti->interfaces[i]); |
| 241 | } |
| 242 | |
| 243 | if (ti->class_init) { |
| 244 | ti->class_init(ti->class, ti->class_data); |
| 245 | } |
| 246 | } |
| 247 | |
| 248 | static void object_interface_init(Object *obj, InterfaceImpl *iface) |
| 249 | { |
| 250 | TypeImpl *ti = iface->type; |
| 251 | Interface *iface_obj; |
| 252 | |
| 253 | iface_obj = INTERFACE(object_new(ti->name)); |
| 254 | iface_obj->obj = obj; |
| 255 | |
| 256 | obj->interfaces = g_slist_prepend(obj->interfaces, iface_obj); |
| 257 | } |
| 258 | |
| 259 | static void object_init_with_type(Object *obj, TypeImpl *ti) |
| 260 | { |
| 261 | int i; |
| 262 | |
| 263 | if (type_has_parent(ti)) { |
| 264 | object_init_with_type(obj, type_get_parent(ti)); |
| 265 | } |
| 266 | |
| 267 | for (i = 0; i < ti->num_interfaces; i++) { |
| 268 | object_interface_init(obj, &ti->interfaces[i]); |
| 269 | } |
| 270 | |
| 271 | if (ti->instance_init) { |
| 272 | ti->instance_init(obj); |
| 273 | } |
| 274 | } |
| 275 | |
| 276 | void object_initialize_with_type(void *data, TypeImpl *type) |
| 277 | { |
| 278 | Object *obj = data; |
| 279 | |
| 280 | g_assert(type != NULL); |
Anthony Liguori | 2f28d2f | 2011-12-03 17:10:08 -0600 | [diff] [blame] | 281 | type_class_init(type); |
Igor Mitsyanko | aca59af | 2012-02-28 15:57:10 +0400 | [diff] [blame^] | 282 | |
| 283 | g_assert(type->instance_size >= sizeof(Object)); |
Anthony Liguori | 2f28d2f | 2011-12-03 17:10:08 -0600 | [diff] [blame] | 284 | g_assert(type->abstract == false); |
| 285 | |
| 286 | memset(obj, 0, type->instance_size); |
| 287 | obj->class = type->class; |
Anthony Liguori | 57c9faf | 2012-01-30 08:55:55 -0600 | [diff] [blame] | 288 | QTAILQ_INIT(&obj->properties); |
Anthony Liguori | 2f28d2f | 2011-12-03 17:10:08 -0600 | [diff] [blame] | 289 | object_init_with_type(obj, type); |
| 290 | } |
| 291 | |
| 292 | void object_initialize(void *data, const char *typename) |
| 293 | { |
| 294 | TypeImpl *type = type_get_by_name(typename); |
| 295 | |
| 296 | object_initialize_with_type(data, type); |
| 297 | } |
| 298 | |
Anthony Liguori | 57c9faf | 2012-01-30 08:55:55 -0600 | [diff] [blame] | 299 | static void object_property_del_all(Object *obj) |
| 300 | { |
| 301 | while (!QTAILQ_EMPTY(&obj->properties)) { |
| 302 | ObjectProperty *prop = QTAILQ_FIRST(&obj->properties); |
| 303 | |
| 304 | QTAILQ_REMOVE(&obj->properties, prop, node); |
| 305 | |
| 306 | if (prop->release) { |
| 307 | prop->release(obj, prop->name, prop->opaque); |
| 308 | } |
| 309 | |
| 310 | g_free(prop->name); |
| 311 | g_free(prop->type); |
| 312 | g_free(prop); |
| 313 | } |
| 314 | } |
| 315 | |
| 316 | static void object_property_del_child(Object *obj, Object *child, Error **errp) |
| 317 | { |
| 318 | ObjectProperty *prop; |
| 319 | |
| 320 | QTAILQ_FOREACH(prop, &obj->properties, node) { |
Paolo Bonzini | 6c1fdcf | 2012-02-28 09:54:15 +0100 | [diff] [blame] | 321 | if (strstart(prop->type, "child<", NULL) && prop->opaque == child) { |
Anthony Liguori | 57c9faf | 2012-01-30 08:55:55 -0600 | [diff] [blame] | 322 | object_property_del(obj, prop->name, errp); |
Paolo Bonzini | 6c1fdcf | 2012-02-28 09:54:15 +0100 | [diff] [blame] | 323 | break; |
Anthony Liguori | 57c9faf | 2012-01-30 08:55:55 -0600 | [diff] [blame] | 324 | } |
| 325 | } |
| 326 | } |
| 327 | |
| 328 | void object_unparent(Object *obj) |
| 329 | { |
| 330 | if (obj->parent) { |
| 331 | object_property_del_child(obj->parent, obj, NULL); |
| 332 | } |
| 333 | } |
| 334 | |
Anthony Liguori | 2f28d2f | 2011-12-03 17:10:08 -0600 | [diff] [blame] | 335 | static void object_deinit(Object *obj, TypeImpl *type) |
| 336 | { |
| 337 | if (type->instance_finalize) { |
| 338 | type->instance_finalize(obj); |
| 339 | } |
| 340 | |
| 341 | while (obj->interfaces) { |
| 342 | Interface *iface_obj = obj->interfaces->data; |
| 343 | obj->interfaces = g_slist_delete_link(obj->interfaces, obj->interfaces); |
| 344 | object_delete(OBJECT(iface_obj)); |
| 345 | } |
| 346 | |
| 347 | if (type_has_parent(type)) { |
| 348 | object_deinit(obj, type_get_parent(type)); |
| 349 | } |
Anthony Liguori | 57c9faf | 2012-01-30 08:55:55 -0600 | [diff] [blame] | 350 | |
| 351 | object_unparent(obj); |
Anthony Liguori | 2f28d2f | 2011-12-03 17:10:08 -0600 | [diff] [blame] | 352 | } |
| 353 | |
| 354 | void object_finalize(void *data) |
| 355 | { |
| 356 | Object *obj = data; |
| 357 | TypeImpl *ti = obj->class->type; |
| 358 | |
| 359 | object_deinit(obj, ti); |
Anthony Liguori | 57c9faf | 2012-01-30 08:55:55 -0600 | [diff] [blame] | 360 | object_property_del_all(obj); |
Anthony Liguori | db85b57 | 2011-12-23 08:47:39 -0600 | [diff] [blame] | 361 | |
| 362 | g_assert(obj->ref == 0); |
Anthony Liguori | 2f28d2f | 2011-12-03 17:10:08 -0600 | [diff] [blame] | 363 | } |
| 364 | |
| 365 | Object *object_new_with_type(Type type) |
| 366 | { |
| 367 | Object *obj; |
| 368 | |
| 369 | g_assert(type != NULL); |
Igor Mitsyanko | aca59af | 2012-02-28 15:57:10 +0400 | [diff] [blame^] | 370 | type_class_init(type); |
Anthony Liguori | 2f28d2f | 2011-12-03 17:10:08 -0600 | [diff] [blame] | 371 | |
| 372 | obj = g_malloc(type->instance_size); |
| 373 | object_initialize_with_type(obj, type); |
Anthony Liguori | db85b57 | 2011-12-23 08:47:39 -0600 | [diff] [blame] | 374 | object_ref(obj); |
Anthony Liguori | 2f28d2f | 2011-12-03 17:10:08 -0600 | [diff] [blame] | 375 | |
| 376 | return obj; |
| 377 | } |
| 378 | |
| 379 | Object *object_new(const char *typename) |
| 380 | { |
| 381 | TypeImpl *ti = type_get_by_name(typename); |
| 382 | |
| 383 | return object_new_with_type(ti); |
| 384 | } |
| 385 | |
| 386 | void object_delete(Object *obj) |
| 387 | { |
Anthony Liguori | db85b57 | 2011-12-23 08:47:39 -0600 | [diff] [blame] | 388 | object_unref(obj); |
| 389 | g_assert(obj->ref == 0); |
Anthony Liguori | 2f28d2f | 2011-12-03 17:10:08 -0600 | [diff] [blame] | 390 | g_free(obj); |
| 391 | } |
| 392 | |
Paolo Bonzini | acc4af3 | 2012-02-03 11:57:23 +0100 | [diff] [blame] | 393 | static bool type_is_ancestor(TypeImpl *type, TypeImpl *target_type) |
Anthony Liguori | 2f28d2f | 2011-12-03 17:10:08 -0600 | [diff] [blame] | 394 | { |
Paolo Bonzini | acc4af3 | 2012-02-03 11:57:23 +0100 | [diff] [blame] | 395 | assert(target_type); |
Anthony Liguori | 2f28d2f | 2011-12-03 17:10:08 -0600 | [diff] [blame] | 396 | |
| 397 | /* Check if typename is a direct ancestor of type */ |
| 398 | while (type) { |
| 399 | if (type == target_type) { |
| 400 | return true; |
| 401 | } |
| 402 | |
| 403 | type = type_get_parent(type); |
| 404 | } |
| 405 | |
Anthony Liguori | 2f28d2f | 2011-12-03 17:10:08 -0600 | [diff] [blame] | 406 | return false; |
| 407 | } |
| 408 | |
Paolo Bonzini | 9970bd8 | 2012-02-03 11:51:39 +0100 | [diff] [blame] | 409 | static bool object_is_type(Object *obj, TypeImpl *target_type) |
Paolo Bonzini | acc4af3 | 2012-02-03 11:57:23 +0100 | [diff] [blame] | 410 | { |
Paolo Bonzini | 9970bd8 | 2012-02-03 11:51:39 +0100 | [diff] [blame] | 411 | return !target_type || type_is_ancestor(obj->class->type, target_type); |
Paolo Bonzini | acc4af3 | 2012-02-03 11:57:23 +0100 | [diff] [blame] | 412 | } |
| 413 | |
Anthony Liguori | 2f28d2f | 2011-12-03 17:10:08 -0600 | [diff] [blame] | 414 | Object *object_dynamic_cast(Object *obj, const char *typename) |
| 415 | { |
Paolo Bonzini | 9970bd8 | 2012-02-03 11:51:39 +0100 | [diff] [blame] | 416 | TypeImpl *target_type = type_get_by_name(typename); |
Anthony Liguori | 2f28d2f | 2011-12-03 17:10:08 -0600 | [diff] [blame] | 417 | GSList *i; |
| 418 | |
Paolo Bonzini | acc4af3 | 2012-02-03 11:57:23 +0100 | [diff] [blame] | 419 | /* Check if typename is a direct ancestor. Special-case TYPE_OBJECT, |
| 420 | * we want to go back from interfaces to the parent. |
| 421 | */ |
Paolo Bonzini | 9970bd8 | 2012-02-03 11:51:39 +0100 | [diff] [blame] | 422 | if (target_type && object_is_type(obj, target_type)) { |
Paolo Bonzini | acc4af3 | 2012-02-03 11:57:23 +0100 | [diff] [blame] | 423 | return obj; |
| 424 | } |
| 425 | |
| 426 | /* Check if obj is an interface and its containing object is a direct |
| 427 | * ancestor of typename. In principle we could do this test at the very |
| 428 | * beginning of object_dynamic_cast, avoiding a second call to |
| 429 | * object_is_type. However, casting between interfaces is relatively |
Paolo Bonzini | 9970bd8 | 2012-02-03 11:51:39 +0100 | [diff] [blame] | 430 | * rare, and object_is_type(obj, type_interface) would fail almost always. |
Paolo Bonzini | acc4af3 | 2012-02-03 11:57:23 +0100 | [diff] [blame] | 431 | * |
| 432 | * Perhaps we could add a magic value to the object header for increased |
| 433 | * (run-time) type safety and to speed up tests like this one. If we ever |
| 434 | * do that we can revisit the order here. |
| 435 | */ |
Paolo Bonzini | 9970bd8 | 2012-02-03 11:51:39 +0100 | [diff] [blame] | 436 | if (object_is_type(obj, type_interface)) { |
Paolo Bonzini | acc4af3 | 2012-02-03 11:57:23 +0100 | [diff] [blame] | 437 | assert(!obj->interfaces); |
| 438 | obj = INTERFACE(obj)->obj; |
Paolo Bonzini | 9970bd8 | 2012-02-03 11:51:39 +0100 | [diff] [blame] | 439 | if (object_is_type(obj, target_type)) { |
Paolo Bonzini | acc4af3 | 2012-02-03 11:57:23 +0100 | [diff] [blame] | 440 | return obj; |
| 441 | } |
| 442 | } |
| 443 | |
Paolo Bonzini | 9970bd8 | 2012-02-03 11:51:39 +0100 | [diff] [blame] | 444 | if (!target_type) { |
Anthony Liguori | 2f28d2f | 2011-12-03 17:10:08 -0600 | [diff] [blame] | 445 | return obj; |
| 446 | } |
| 447 | |
| 448 | /* Check if obj has an interface of typename */ |
| 449 | for (i = obj->interfaces; i; i = i->next) { |
| 450 | Interface *iface = i->data; |
| 451 | |
Paolo Bonzini | 9970bd8 | 2012-02-03 11:51:39 +0100 | [diff] [blame] | 452 | if (object_is_type(OBJECT(iface), target_type)) { |
Anthony Liguori | 2f28d2f | 2011-12-03 17:10:08 -0600 | [diff] [blame] | 453 | return OBJECT(iface); |
| 454 | } |
| 455 | } |
| 456 | |
Anthony Liguori | 2f28d2f | 2011-12-03 17:10:08 -0600 | [diff] [blame] | 457 | return NULL; |
| 458 | } |
| 459 | |
| 460 | |
Andreas Färber | 83f7d43 | 2012-02-09 15:20:55 +0100 | [diff] [blame] | 461 | static void register_types(void) |
Anthony Liguori | 2f28d2f | 2011-12-03 17:10:08 -0600 | [diff] [blame] | 462 | { |
| 463 | static TypeInfo interface_info = { |
| 464 | .name = TYPE_INTERFACE, |
| 465 | .instance_size = sizeof(Interface), |
| 466 | .abstract = true, |
| 467 | }; |
| 468 | |
Paolo Bonzini | 9970bd8 | 2012-02-03 11:51:39 +0100 | [diff] [blame] | 469 | type_interface = type_register_static(&interface_info); |
Anthony Liguori | 2f28d2f | 2011-12-03 17:10:08 -0600 | [diff] [blame] | 470 | } |
| 471 | |
Andreas Färber | 83f7d43 | 2012-02-09 15:20:55 +0100 | [diff] [blame] | 472 | type_init(register_types) |
Anthony Liguori | 2f28d2f | 2011-12-03 17:10:08 -0600 | [diff] [blame] | 473 | |
| 474 | Object *object_dynamic_cast_assert(Object *obj, const char *typename) |
| 475 | { |
| 476 | Object *inst; |
| 477 | |
| 478 | inst = object_dynamic_cast(obj, typename); |
| 479 | |
| 480 | if (!inst) { |
| 481 | fprintf(stderr, "Object %p is not an instance of type %s\n", |
| 482 | obj, typename); |
| 483 | abort(); |
| 484 | } |
| 485 | |
| 486 | return inst; |
| 487 | } |
| 488 | |
| 489 | ObjectClass *object_class_dynamic_cast(ObjectClass *class, |
| 490 | const char *typename) |
| 491 | { |
| 492 | TypeImpl *target_type = type_get_by_name(typename); |
| 493 | TypeImpl *type = class->type; |
| 494 | |
| 495 | while (type) { |
| 496 | if (type == target_type) { |
| 497 | return class; |
| 498 | } |
| 499 | |
| 500 | type = type_get_parent(type); |
| 501 | } |
| 502 | |
| 503 | return NULL; |
| 504 | } |
| 505 | |
| 506 | ObjectClass *object_class_dynamic_cast_assert(ObjectClass *class, |
| 507 | const char *typename) |
| 508 | { |
| 509 | ObjectClass *ret = object_class_dynamic_cast(class, typename); |
| 510 | |
| 511 | if (!ret) { |
| 512 | fprintf(stderr, "Object %p is not an instance of type %s\n", |
| 513 | class, typename); |
| 514 | abort(); |
| 515 | } |
| 516 | |
| 517 | return ret; |
| 518 | } |
| 519 | |
| 520 | const char *object_get_typename(Object *obj) |
| 521 | { |
| 522 | return obj->class->type->name; |
| 523 | } |
| 524 | |
| 525 | ObjectClass *object_get_class(Object *obj) |
| 526 | { |
| 527 | return obj->class; |
| 528 | } |
| 529 | |
| 530 | const char *object_class_get_name(ObjectClass *klass) |
| 531 | { |
| 532 | return klass->type->name; |
| 533 | } |
| 534 | |
| 535 | ObjectClass *object_class_by_name(const char *typename) |
| 536 | { |
| 537 | TypeImpl *type = type_get_by_name(typename); |
| 538 | |
| 539 | if (!type) { |
| 540 | return NULL; |
| 541 | } |
| 542 | |
| 543 | type_class_init(type); |
| 544 | |
| 545 | return type->class; |
| 546 | } |
| 547 | |
| 548 | typedef struct OCFData |
| 549 | { |
| 550 | void (*fn)(ObjectClass *klass, void *opaque); |
Anthony Liguori | 93c511a | 2011-12-22 14:11:53 -0600 | [diff] [blame] | 551 | const char *implements_type; |
| 552 | bool include_abstract; |
Anthony Liguori | 2f28d2f | 2011-12-03 17:10:08 -0600 | [diff] [blame] | 553 | void *opaque; |
| 554 | } OCFData; |
| 555 | |
| 556 | static void object_class_foreach_tramp(gpointer key, gpointer value, |
| 557 | gpointer opaque) |
| 558 | { |
| 559 | OCFData *data = opaque; |
| 560 | TypeImpl *type = value; |
Anthony Liguori | 93c511a | 2011-12-22 14:11:53 -0600 | [diff] [blame] | 561 | ObjectClass *k; |
Anthony Liguori | 2f28d2f | 2011-12-03 17:10:08 -0600 | [diff] [blame] | 562 | |
| 563 | type_class_init(type); |
Anthony Liguori | 93c511a | 2011-12-22 14:11:53 -0600 | [diff] [blame] | 564 | k = type->class; |
Anthony Liguori | 2f28d2f | 2011-12-03 17:10:08 -0600 | [diff] [blame] | 565 | |
Anthony Liguori | 93c511a | 2011-12-22 14:11:53 -0600 | [diff] [blame] | 566 | if (!data->include_abstract && type->abstract) { |
| 567 | return; |
| 568 | } |
| 569 | |
| 570 | if (data->implements_type && |
| 571 | !object_class_dynamic_cast(k, data->implements_type)) { |
| 572 | return; |
| 573 | } |
| 574 | |
| 575 | data->fn(k, data->opaque); |
Anthony Liguori | 2f28d2f | 2011-12-03 17:10:08 -0600 | [diff] [blame] | 576 | } |
| 577 | |
| 578 | void object_class_foreach(void (*fn)(ObjectClass *klass, void *opaque), |
Anthony Liguori | 93c511a | 2011-12-22 14:11:53 -0600 | [diff] [blame] | 579 | const char *implements_type, bool include_abstract, |
Anthony Liguori | 2f28d2f | 2011-12-03 17:10:08 -0600 | [diff] [blame] | 580 | void *opaque) |
| 581 | { |
Anthony Liguori | 93c511a | 2011-12-22 14:11:53 -0600 | [diff] [blame] | 582 | OCFData data = { fn, implements_type, include_abstract, opaque }; |
Anthony Liguori | 2f28d2f | 2011-12-03 17:10:08 -0600 | [diff] [blame] | 583 | |
| 584 | g_hash_table_foreach(type_table_get(), object_class_foreach_tramp, &data); |
| 585 | } |
Anthony Liguori | 57c9faf | 2012-01-30 08:55:55 -0600 | [diff] [blame] | 586 | |
| 587 | void object_ref(Object *obj) |
| 588 | { |
| 589 | obj->ref++; |
| 590 | } |
| 591 | |
| 592 | void object_unref(Object *obj) |
| 593 | { |
| 594 | g_assert(obj->ref > 0); |
| 595 | obj->ref--; |
| 596 | |
| 597 | /* parent always holds a reference to its children */ |
| 598 | if (obj->ref == 0) { |
| 599 | object_finalize(obj); |
| 600 | } |
| 601 | } |
| 602 | |
| 603 | void object_property_add(Object *obj, const char *name, const char *type, |
| 604 | ObjectPropertyAccessor *get, |
| 605 | ObjectPropertyAccessor *set, |
| 606 | ObjectPropertyRelease *release, |
| 607 | void *opaque, Error **errp) |
| 608 | { |
| 609 | ObjectProperty *prop = g_malloc0(sizeof(*prop)); |
| 610 | |
| 611 | prop->name = g_strdup(name); |
| 612 | prop->type = g_strdup(type); |
| 613 | |
| 614 | prop->get = get; |
| 615 | prop->set = set; |
| 616 | prop->release = release; |
| 617 | prop->opaque = opaque; |
| 618 | |
| 619 | QTAILQ_INSERT_TAIL(&obj->properties, prop, node); |
| 620 | } |
| 621 | |
| 622 | static ObjectProperty *object_property_find(Object *obj, const char *name) |
| 623 | { |
| 624 | ObjectProperty *prop; |
| 625 | |
| 626 | QTAILQ_FOREACH(prop, &obj->properties, node) { |
| 627 | if (strcmp(prop->name, name) == 0) { |
| 628 | return prop; |
| 629 | } |
| 630 | } |
| 631 | |
| 632 | return NULL; |
| 633 | } |
| 634 | |
| 635 | void object_property_del(Object *obj, const char *name, Error **errp) |
| 636 | { |
| 637 | ObjectProperty *prop = object_property_find(obj, name); |
| 638 | |
| 639 | QTAILQ_REMOVE(&obj->properties, prop, node); |
| 640 | |
| 641 | prop->release(obj, prop->name, prop->opaque); |
| 642 | |
| 643 | g_free(prop->name); |
| 644 | g_free(prop->type); |
| 645 | g_free(prop); |
| 646 | } |
| 647 | |
| 648 | void object_property_get(Object *obj, Visitor *v, const char *name, |
| 649 | Error **errp) |
| 650 | { |
| 651 | ObjectProperty *prop = object_property_find(obj, name); |
| 652 | |
| 653 | if (prop == NULL) { |
| 654 | error_set(errp, QERR_PROPERTY_NOT_FOUND, "", name); |
| 655 | return; |
| 656 | } |
| 657 | |
| 658 | if (!prop->get) { |
| 659 | error_set(errp, QERR_PERMISSION_DENIED); |
| 660 | } else { |
| 661 | prop->get(obj, v, prop->opaque, name, errp); |
| 662 | } |
| 663 | } |
| 664 | |
| 665 | void object_property_set(Object *obj, Visitor *v, const char *name, |
| 666 | Error **errp) |
| 667 | { |
| 668 | ObjectProperty *prop = object_property_find(obj, name); |
| 669 | |
| 670 | if (prop == NULL) { |
| 671 | error_set(errp, QERR_PROPERTY_NOT_FOUND, "", name); |
| 672 | return; |
| 673 | } |
| 674 | |
| 675 | if (!prop->set) { |
| 676 | error_set(errp, QERR_PERMISSION_DENIED); |
| 677 | } else { |
| 678 | prop->set(obj, v, prop->opaque, name, errp); |
| 679 | } |
| 680 | } |
| 681 | |
Paolo Bonzini | 7b7b7d1 | 2012-02-01 17:16:22 +0100 | [diff] [blame] | 682 | void object_property_set_str(Object *obj, const char *value, |
| 683 | const char *name, Error **errp) |
| 684 | { |
| 685 | QString *qstr = qstring_from_str(value); |
| 686 | object_property_set_qobject(obj, QOBJECT(qstr), name, errp); |
| 687 | |
| 688 | QDECREF(qstr); |
| 689 | } |
| 690 | |
| 691 | char *object_property_get_str(Object *obj, const char *name, |
| 692 | Error **errp) |
| 693 | { |
| 694 | QObject *ret = object_property_get_qobject(obj, name, errp); |
| 695 | QString *qstring; |
| 696 | char *retval; |
| 697 | |
| 698 | if (!ret) { |
| 699 | return NULL; |
| 700 | } |
| 701 | qstring = qobject_to_qstring(ret); |
| 702 | if (!qstring) { |
| 703 | error_set(errp, QERR_INVALID_PARAMETER_TYPE, name, "string"); |
| 704 | retval = NULL; |
| 705 | } else { |
| 706 | retval = g_strdup(qstring_get_str(qstring)); |
| 707 | } |
| 708 | |
| 709 | QDECREF(qstring); |
| 710 | return retval; |
| 711 | } |
| 712 | |
Paolo Bonzini | 1d9c5a1 | 2012-02-02 10:51:57 +0100 | [diff] [blame] | 713 | void object_property_set_link(Object *obj, Object *value, |
| 714 | const char *name, Error **errp) |
| 715 | { |
| 716 | object_property_set_str(obj, object_get_canonical_path(value), |
| 717 | name, errp); |
| 718 | } |
| 719 | |
| 720 | Object *object_property_get_link(Object *obj, const char *name, |
| 721 | Error **errp) |
| 722 | { |
| 723 | char *str = object_property_get_str(obj, name, errp); |
| 724 | Object *target = NULL; |
| 725 | |
| 726 | if (str && *str) { |
| 727 | target = object_resolve_path(str, NULL); |
| 728 | if (!target) { |
| 729 | error_set(errp, QERR_DEVICE_NOT_FOUND, str); |
| 730 | } |
| 731 | } |
| 732 | |
| 733 | g_free(str); |
| 734 | return target; |
| 735 | } |
| 736 | |
Paolo Bonzini | 7b7b7d1 | 2012-02-01 17:16:22 +0100 | [diff] [blame] | 737 | void object_property_set_bool(Object *obj, bool value, |
| 738 | const char *name, Error **errp) |
| 739 | { |
| 740 | QBool *qbool = qbool_from_int(value); |
| 741 | object_property_set_qobject(obj, QOBJECT(qbool), name, errp); |
| 742 | |
| 743 | QDECREF(qbool); |
| 744 | } |
| 745 | |
| 746 | bool object_property_get_bool(Object *obj, const char *name, |
| 747 | Error **errp) |
| 748 | { |
| 749 | QObject *ret = object_property_get_qobject(obj, name, errp); |
| 750 | QBool *qbool; |
| 751 | bool retval; |
| 752 | |
| 753 | if (!ret) { |
| 754 | return false; |
| 755 | } |
| 756 | qbool = qobject_to_qbool(ret); |
| 757 | if (!qbool) { |
| 758 | error_set(errp, QERR_INVALID_PARAMETER_TYPE, name, "boolean"); |
| 759 | retval = false; |
| 760 | } else { |
| 761 | retval = qbool_get_int(qbool); |
| 762 | } |
| 763 | |
| 764 | QDECREF(qbool); |
| 765 | return retval; |
| 766 | } |
| 767 | |
| 768 | void object_property_set_int(Object *obj, int64_t value, |
| 769 | const char *name, Error **errp) |
| 770 | { |
| 771 | QInt *qint = qint_from_int(value); |
| 772 | object_property_set_qobject(obj, QOBJECT(qint), name, errp); |
| 773 | |
| 774 | QDECREF(qint); |
| 775 | } |
| 776 | |
| 777 | int64_t object_property_get_int(Object *obj, const char *name, |
| 778 | Error **errp) |
| 779 | { |
| 780 | QObject *ret = object_property_get_qobject(obj, name, errp); |
| 781 | QInt *qint; |
| 782 | int64_t retval; |
| 783 | |
| 784 | if (!ret) { |
| 785 | return -1; |
| 786 | } |
| 787 | qint = qobject_to_qint(ret); |
| 788 | if (!qint) { |
| 789 | error_set(errp, QERR_INVALID_PARAMETER_TYPE, name, "int"); |
| 790 | retval = -1; |
| 791 | } else { |
| 792 | retval = qint_get_int(qint); |
| 793 | } |
| 794 | |
| 795 | QDECREF(qint); |
| 796 | return retval; |
| 797 | } |
| 798 | |
Paolo Bonzini | b2cd7de | 2012-02-09 09:52:59 +0100 | [diff] [blame] | 799 | void object_property_parse(Object *obj, const char *string, |
| 800 | const char *name, Error **errp) |
| 801 | { |
| 802 | StringInputVisitor *mi; |
| 803 | mi = string_input_visitor_new(string); |
| 804 | object_property_set(obj, string_input_get_visitor(mi), name, errp); |
| 805 | |
| 806 | string_input_visitor_cleanup(mi); |
| 807 | } |
| 808 | |
| 809 | char *object_property_print(Object *obj, const char *name, |
| 810 | Error **errp) |
| 811 | { |
| 812 | StringOutputVisitor *mo; |
| 813 | char *string; |
| 814 | |
| 815 | mo = string_output_visitor_new(); |
| 816 | object_property_get(obj, string_output_get_visitor(mo), name, NULL); |
| 817 | string = string_output_get_string(mo); |
| 818 | string_output_visitor_cleanup(mo); |
| 819 | return string; |
| 820 | } |
| 821 | |
Anthony Liguori | 57c9faf | 2012-01-30 08:55:55 -0600 | [diff] [blame] | 822 | const char *object_property_get_type(Object *obj, const char *name, Error **errp) |
| 823 | { |
| 824 | ObjectProperty *prop = object_property_find(obj, name); |
| 825 | |
| 826 | if (prop == NULL) { |
| 827 | error_set(errp, QERR_PROPERTY_NOT_FOUND, "", name); |
| 828 | return NULL; |
| 829 | } |
| 830 | |
| 831 | return prop->type; |
| 832 | } |
| 833 | |
| 834 | Object *object_get_root(void) |
| 835 | { |
Anthony Liguori | 8b45d44 | 2011-12-23 09:08:05 -0600 | [diff] [blame] | 836 | static Object *root; |
Anthony Liguori | 57c9faf | 2012-01-30 08:55:55 -0600 | [diff] [blame] | 837 | |
Anthony Liguori | 8b45d44 | 2011-12-23 09:08:05 -0600 | [diff] [blame] | 838 | if (!root) { |
| 839 | root = object_new("container"); |
Anthony Liguori | 57c9faf | 2012-01-30 08:55:55 -0600 | [diff] [blame] | 840 | } |
| 841 | |
Anthony Liguori | 8b45d44 | 2011-12-23 09:08:05 -0600 | [diff] [blame] | 842 | return root; |
Anthony Liguori | 57c9faf | 2012-01-30 08:55:55 -0600 | [diff] [blame] | 843 | } |
| 844 | |
| 845 | static void object_get_child_property(Object *obj, Visitor *v, void *opaque, |
| 846 | const char *name, Error **errp) |
| 847 | { |
| 848 | Object *child = opaque; |
| 849 | gchar *path; |
| 850 | |
| 851 | path = object_get_canonical_path(child); |
| 852 | visit_type_str(v, &path, name, errp); |
| 853 | g_free(path); |
| 854 | } |
| 855 | |
Anthony Liguori | db85b57 | 2011-12-23 08:47:39 -0600 | [diff] [blame] | 856 | static void object_finalize_child_property(Object *obj, const char *name, |
| 857 | void *opaque) |
| 858 | { |
| 859 | Object *child = opaque; |
| 860 | |
| 861 | object_unref(child); |
| 862 | } |
| 863 | |
Anthony Liguori | 57c9faf | 2012-01-30 08:55:55 -0600 | [diff] [blame] | 864 | void object_property_add_child(Object *obj, const char *name, |
| 865 | Object *child, Error **errp) |
| 866 | { |
| 867 | gchar *type; |
| 868 | |
Paolo Bonzini | a1e7efd | 2012-02-03 15:59:53 +0100 | [diff] [blame] | 869 | /* Registering an interface object in the composition tree will mightily |
| 870 | * confuse object_get_canonical_path (which, on the other hand, knows how |
| 871 | * to get the canonical path of an interface object). |
| 872 | */ |
| 873 | assert(!object_is_type(obj, type_interface)); |
| 874 | |
Anthony Liguori | 57c9faf | 2012-01-30 08:55:55 -0600 | [diff] [blame] | 875 | type = g_strdup_printf("child<%s>", object_get_typename(OBJECT(child))); |
| 876 | |
| 877 | object_property_add(obj, name, type, object_get_child_property, |
Anthony Liguori | db85b57 | 2011-12-23 08:47:39 -0600 | [diff] [blame] | 878 | NULL, object_finalize_child_property, child, errp); |
Anthony Liguori | 57c9faf | 2012-01-30 08:55:55 -0600 | [diff] [blame] | 879 | |
| 880 | object_ref(child); |
| 881 | g_assert(child->parent == NULL); |
| 882 | child->parent = obj; |
| 883 | |
| 884 | g_free(type); |
| 885 | } |
| 886 | |
| 887 | static void object_get_link_property(Object *obj, Visitor *v, void *opaque, |
| 888 | const char *name, Error **errp) |
| 889 | { |
| 890 | Object **child = opaque; |
| 891 | gchar *path; |
| 892 | |
| 893 | if (*child) { |
| 894 | path = object_get_canonical_path(*child); |
| 895 | visit_type_str(v, &path, name, errp); |
| 896 | g_free(path); |
| 897 | } else { |
| 898 | path = (gchar *)""; |
| 899 | visit_type_str(v, &path, name, errp); |
| 900 | } |
| 901 | } |
| 902 | |
| 903 | static void object_set_link_property(Object *obj, Visitor *v, void *opaque, |
| 904 | const char *name, Error **errp) |
| 905 | { |
| 906 | Object **child = opaque; |
Alexander Barabash | f0cdc96 | 2012-02-22 19:22:26 +0200 | [diff] [blame] | 907 | Object *old_target; |
Anthony Liguori | 57c9faf | 2012-01-30 08:55:55 -0600 | [diff] [blame] | 908 | bool ambiguous = false; |
| 909 | const char *type; |
| 910 | char *path; |
Paolo Bonzini | 11e35bf | 2012-02-02 12:37:53 +0100 | [diff] [blame] | 911 | gchar *target_type; |
Anthony Liguori | 57c9faf | 2012-01-30 08:55:55 -0600 | [diff] [blame] | 912 | |
| 913 | type = object_property_get_type(obj, name, NULL); |
| 914 | |
| 915 | visit_type_str(v, &path, name, errp); |
| 916 | |
Alexander Barabash | f0cdc96 | 2012-02-22 19:22:26 +0200 | [diff] [blame] | 917 | old_target = *child; |
| 918 | *child = NULL; |
Anthony Liguori | 57c9faf | 2012-01-30 08:55:55 -0600 | [diff] [blame] | 919 | |
| 920 | if (strcmp(path, "") != 0) { |
| 921 | Object *target; |
| 922 | |
Paolo Bonzini | 11e35bf | 2012-02-02 12:37:53 +0100 | [diff] [blame] | 923 | /* Go from link<FOO> to FOO. */ |
| 924 | target_type = g_strndup(&type[5], strlen(type) - 6); |
| 925 | target = object_resolve_path_type(path, target_type, &ambiguous); |
Anthony Liguori | 57c9faf | 2012-01-30 08:55:55 -0600 | [diff] [blame] | 926 | |
Paolo Bonzini | 11e35bf | 2012-02-02 12:37:53 +0100 | [diff] [blame] | 927 | if (ambiguous) { |
| 928 | error_set(errp, QERR_AMBIGUOUS_PATH, path); |
| 929 | } else if (target) { |
| 930 | object_ref(target); |
| 931 | *child = target; |
Anthony Liguori | 57c9faf | 2012-01-30 08:55:55 -0600 | [diff] [blame] | 932 | } else { |
Paolo Bonzini | 11e35bf | 2012-02-02 12:37:53 +0100 | [diff] [blame] | 933 | target = object_resolve_path(path, &ambiguous); |
| 934 | if (target || ambiguous) { |
| 935 | error_set(errp, QERR_INVALID_PARAMETER_TYPE, name, target_type); |
| 936 | } else { |
| 937 | error_set(errp, QERR_DEVICE_NOT_FOUND, path); |
| 938 | } |
Anthony Liguori | 57c9faf | 2012-01-30 08:55:55 -0600 | [diff] [blame] | 939 | } |
Paolo Bonzini | 11e35bf | 2012-02-02 12:37:53 +0100 | [diff] [blame] | 940 | g_free(target_type); |
Anthony Liguori | 57c9faf | 2012-01-30 08:55:55 -0600 | [diff] [blame] | 941 | } |
| 942 | |
| 943 | g_free(path); |
Alexander Barabash | f0cdc96 | 2012-02-22 19:22:26 +0200 | [diff] [blame] | 944 | |
| 945 | if (old_target != NULL) { |
| 946 | object_unref(old_target); |
| 947 | } |
Anthony Liguori | 57c9faf | 2012-01-30 08:55:55 -0600 | [diff] [blame] | 948 | } |
| 949 | |
| 950 | void object_property_add_link(Object *obj, const char *name, |
| 951 | const char *type, Object **child, |
| 952 | Error **errp) |
| 953 | { |
| 954 | gchar *full_type; |
| 955 | |
| 956 | full_type = g_strdup_printf("link<%s>", type); |
| 957 | |
| 958 | object_property_add(obj, name, full_type, |
| 959 | object_get_link_property, |
| 960 | object_set_link_property, |
| 961 | NULL, child, errp); |
| 962 | |
| 963 | g_free(full_type); |
| 964 | } |
| 965 | |
| 966 | gchar *object_get_canonical_path(Object *obj) |
| 967 | { |
| 968 | Object *root = object_get_root(); |
| 969 | char *newpath = NULL, *path = NULL; |
| 970 | |
Paolo Bonzini | a1e7efd | 2012-02-03 15:59:53 +0100 | [diff] [blame] | 971 | if (object_is_type(obj, type_interface)) { |
| 972 | obj = INTERFACE(obj)->obj; |
| 973 | } |
| 974 | |
Anthony Liguori | 57c9faf | 2012-01-30 08:55:55 -0600 | [diff] [blame] | 975 | while (obj != root) { |
| 976 | ObjectProperty *prop = NULL; |
| 977 | |
| 978 | g_assert(obj->parent != NULL); |
| 979 | |
| 980 | QTAILQ_FOREACH(prop, &obj->parent->properties, node) { |
| 981 | if (!strstart(prop->type, "child<", NULL)) { |
| 982 | continue; |
| 983 | } |
| 984 | |
| 985 | if (prop->opaque == obj) { |
| 986 | if (path) { |
| 987 | newpath = g_strdup_printf("%s/%s", prop->name, path); |
| 988 | g_free(path); |
| 989 | path = newpath; |
| 990 | } else { |
| 991 | path = g_strdup(prop->name); |
| 992 | } |
| 993 | break; |
| 994 | } |
| 995 | } |
| 996 | |
| 997 | g_assert(prop != NULL); |
| 998 | |
| 999 | obj = obj->parent; |
| 1000 | } |
| 1001 | |
| 1002 | newpath = g_strdup_printf("/%s", path); |
| 1003 | g_free(path); |
| 1004 | |
| 1005 | return newpath; |
| 1006 | } |
| 1007 | |
| 1008 | static Object *object_resolve_abs_path(Object *parent, |
| 1009 | gchar **parts, |
Paolo Bonzini | 02fe2db | 2012-02-03 11:21:01 +0100 | [diff] [blame] | 1010 | const char *typename, |
Anthony Liguori | 57c9faf | 2012-01-30 08:55:55 -0600 | [diff] [blame] | 1011 | int index) |
| 1012 | { |
| 1013 | ObjectProperty *prop; |
| 1014 | Object *child; |
| 1015 | |
| 1016 | if (parts[index] == NULL) { |
Paolo Bonzini | 02fe2db | 2012-02-03 11:21:01 +0100 | [diff] [blame] | 1017 | return object_dynamic_cast(parent, typename); |
Anthony Liguori | 57c9faf | 2012-01-30 08:55:55 -0600 | [diff] [blame] | 1018 | } |
| 1019 | |
| 1020 | if (strcmp(parts[index], "") == 0) { |
Paolo Bonzini | 02fe2db | 2012-02-03 11:21:01 +0100 | [diff] [blame] | 1021 | return object_resolve_abs_path(parent, parts, typename, index + 1); |
Anthony Liguori | 57c9faf | 2012-01-30 08:55:55 -0600 | [diff] [blame] | 1022 | } |
| 1023 | |
| 1024 | prop = object_property_find(parent, parts[index]); |
| 1025 | if (prop == NULL) { |
| 1026 | return NULL; |
| 1027 | } |
| 1028 | |
| 1029 | child = NULL; |
| 1030 | if (strstart(prop->type, "link<", NULL)) { |
| 1031 | Object **pchild = prop->opaque; |
| 1032 | if (*pchild) { |
| 1033 | child = *pchild; |
| 1034 | } |
| 1035 | } else if (strstart(prop->type, "child<", NULL)) { |
| 1036 | child = prop->opaque; |
| 1037 | } |
| 1038 | |
| 1039 | if (!child) { |
| 1040 | return NULL; |
| 1041 | } |
| 1042 | |
Paolo Bonzini | 02fe2db | 2012-02-03 11:21:01 +0100 | [diff] [blame] | 1043 | return object_resolve_abs_path(child, parts, typename, index + 1); |
Anthony Liguori | 57c9faf | 2012-01-30 08:55:55 -0600 | [diff] [blame] | 1044 | } |
| 1045 | |
| 1046 | static Object *object_resolve_partial_path(Object *parent, |
| 1047 | gchar **parts, |
Paolo Bonzini | 02fe2db | 2012-02-03 11:21:01 +0100 | [diff] [blame] | 1048 | const char *typename, |
Anthony Liguori | 57c9faf | 2012-01-30 08:55:55 -0600 | [diff] [blame] | 1049 | bool *ambiguous) |
| 1050 | { |
| 1051 | Object *obj; |
| 1052 | ObjectProperty *prop; |
| 1053 | |
Paolo Bonzini | 02fe2db | 2012-02-03 11:21:01 +0100 | [diff] [blame] | 1054 | obj = object_resolve_abs_path(parent, parts, typename, 0); |
Anthony Liguori | 57c9faf | 2012-01-30 08:55:55 -0600 | [diff] [blame] | 1055 | |
| 1056 | QTAILQ_FOREACH(prop, &parent->properties, node) { |
| 1057 | Object *found; |
| 1058 | |
| 1059 | if (!strstart(prop->type, "child<", NULL)) { |
| 1060 | continue; |
| 1061 | } |
| 1062 | |
Paolo Bonzini | 02fe2db | 2012-02-03 11:21:01 +0100 | [diff] [blame] | 1063 | found = object_resolve_partial_path(prop->opaque, parts, |
| 1064 | typename, ambiguous); |
Anthony Liguori | 57c9faf | 2012-01-30 08:55:55 -0600 | [diff] [blame] | 1065 | if (found) { |
| 1066 | if (obj) { |
| 1067 | if (ambiguous) { |
| 1068 | *ambiguous = true; |
| 1069 | } |
| 1070 | return NULL; |
| 1071 | } |
| 1072 | obj = found; |
| 1073 | } |
| 1074 | |
| 1075 | if (ambiguous && *ambiguous) { |
| 1076 | return NULL; |
| 1077 | } |
| 1078 | } |
| 1079 | |
| 1080 | return obj; |
| 1081 | } |
| 1082 | |
Paolo Bonzini | 02fe2db | 2012-02-03 11:21:01 +0100 | [diff] [blame] | 1083 | Object *object_resolve_path_type(const char *path, const char *typename, |
| 1084 | bool *ambiguous) |
Anthony Liguori | 57c9faf | 2012-01-30 08:55:55 -0600 | [diff] [blame] | 1085 | { |
| 1086 | bool partial_path = true; |
| 1087 | Object *obj; |
| 1088 | gchar **parts; |
| 1089 | |
| 1090 | parts = g_strsplit(path, "/", 0); |
| 1091 | if (parts == NULL || parts[0] == NULL) { |
| 1092 | g_strfreev(parts); |
| 1093 | return object_get_root(); |
| 1094 | } |
| 1095 | |
| 1096 | if (strcmp(parts[0], "") == 0) { |
| 1097 | partial_path = false; |
| 1098 | } |
| 1099 | |
| 1100 | if (partial_path) { |
| 1101 | if (ambiguous) { |
| 1102 | *ambiguous = false; |
| 1103 | } |
Paolo Bonzini | 02fe2db | 2012-02-03 11:21:01 +0100 | [diff] [blame] | 1104 | obj = object_resolve_partial_path(object_get_root(), parts, |
| 1105 | typename, ambiguous); |
Anthony Liguori | 57c9faf | 2012-01-30 08:55:55 -0600 | [diff] [blame] | 1106 | } else { |
Paolo Bonzini | 02fe2db | 2012-02-03 11:21:01 +0100 | [diff] [blame] | 1107 | obj = object_resolve_abs_path(object_get_root(), parts, typename, 1); |
Anthony Liguori | 57c9faf | 2012-01-30 08:55:55 -0600 | [diff] [blame] | 1108 | } |
| 1109 | |
| 1110 | g_strfreev(parts); |
| 1111 | |
| 1112 | return obj; |
| 1113 | } |
| 1114 | |
Paolo Bonzini | 02fe2db | 2012-02-03 11:21:01 +0100 | [diff] [blame] | 1115 | Object *object_resolve_path(const char *path, bool *ambiguous) |
| 1116 | { |
| 1117 | return object_resolve_path_type(path, TYPE_OBJECT, ambiguous); |
| 1118 | } |
| 1119 | |
Anthony Liguori | 57c9faf | 2012-01-30 08:55:55 -0600 | [diff] [blame] | 1120 | typedef struct StringProperty |
| 1121 | { |
| 1122 | char *(*get)(Object *, Error **); |
| 1123 | void (*set)(Object *, const char *, Error **); |
| 1124 | } StringProperty; |
| 1125 | |
Paolo Bonzini | 7b7b7d1 | 2012-02-01 17:16:22 +0100 | [diff] [blame] | 1126 | static void property_get_str(Object *obj, Visitor *v, void *opaque, |
| 1127 | const char *name, Error **errp) |
Anthony Liguori | 57c9faf | 2012-01-30 08:55:55 -0600 | [diff] [blame] | 1128 | { |
| 1129 | StringProperty *prop = opaque; |
| 1130 | char *value; |
| 1131 | |
| 1132 | value = prop->get(obj, errp); |
| 1133 | if (value) { |
| 1134 | visit_type_str(v, &value, name, errp); |
| 1135 | g_free(value); |
| 1136 | } |
| 1137 | } |
| 1138 | |
Paolo Bonzini | 7b7b7d1 | 2012-02-01 17:16:22 +0100 | [diff] [blame] | 1139 | static void property_set_str(Object *obj, Visitor *v, void *opaque, |
| 1140 | const char *name, Error **errp) |
Anthony Liguori | 57c9faf | 2012-01-30 08:55:55 -0600 | [diff] [blame] | 1141 | { |
| 1142 | StringProperty *prop = opaque; |
| 1143 | char *value; |
| 1144 | Error *local_err = NULL; |
| 1145 | |
| 1146 | visit_type_str(v, &value, name, &local_err); |
| 1147 | if (local_err) { |
| 1148 | error_propagate(errp, local_err); |
| 1149 | return; |
| 1150 | } |
| 1151 | |
| 1152 | prop->set(obj, value, errp); |
| 1153 | g_free(value); |
| 1154 | } |
| 1155 | |
Paolo Bonzini | 7b7b7d1 | 2012-02-01 17:16:22 +0100 | [diff] [blame] | 1156 | static void property_release_str(Object *obj, const char *name, |
| 1157 | void *opaque) |
Anthony Liguori | 57c9faf | 2012-01-30 08:55:55 -0600 | [diff] [blame] | 1158 | { |
| 1159 | StringProperty *prop = opaque; |
| 1160 | g_free(prop); |
| 1161 | } |
| 1162 | |
| 1163 | void object_property_add_str(Object *obj, const char *name, |
| 1164 | char *(*get)(Object *, Error **), |
| 1165 | void (*set)(Object *, const char *, Error **), |
| 1166 | Error **errp) |
| 1167 | { |
| 1168 | StringProperty *prop = g_malloc0(sizeof(*prop)); |
| 1169 | |
| 1170 | prop->get = get; |
| 1171 | prop->set = set; |
| 1172 | |
| 1173 | object_property_add(obj, name, "string", |
Paolo Bonzini | 7b7b7d1 | 2012-02-01 17:16:22 +0100 | [diff] [blame] | 1174 | get ? property_get_str : NULL, |
| 1175 | set ? property_set_str : NULL, |
| 1176 | property_release_str, |
Anthony Liguori | 57c9faf | 2012-01-30 08:55:55 -0600 | [diff] [blame] | 1177 | prop, errp); |
| 1178 | } |