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2f28d2ff AL |
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" | |
57c9fafe | 15 | #include "qapi/qapi-visit-core.h" |
b2cd7dee PB |
16 | #include "qapi/string-input-visitor.h" |
17 | #include "qapi/string-output-visitor.h" | |
2f28d2ff | 18 | |
7b7b7d18 PB |
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 | ||
2f28d2ff AL |
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 | ||
9970bd88 PB |
74 | static Type type_interface; |
75 | ||
2f28d2ff AL |
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 | ||
73093354 AL |
103 | if (type_table_lookup(info->name) != NULL) { |
104 | fprintf(stderr, "Registering `%s' which already exists\n", info->name); | |
105 | abort(); | |
106 | } | |
107 | ||
2f28d2ff AL |
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 | ||
180 | static void type_class_interface_init(TypeImpl *ti, InterfaceImpl *iface) | |
181 | { | |
182 | TypeInfo info = { | |
183 | .instance_size = sizeof(Interface), | |
184 | .parent = iface->parent, | |
185 | .class_size = sizeof(InterfaceClass), | |
186 | .class_init = iface->interface_initfn, | |
187 | .abstract = true, | |
188 | }; | |
189 | char *name = g_strdup_printf("<%s::%s>", ti->name, iface->parent); | |
190 | ||
191 | info.name = name; | |
192 | iface->type = type_register(&info); | |
193 | g_free(name); | |
194 | } | |
195 | ||
196 | static void type_class_init(TypeImpl *ti) | |
197 | { | |
198 | size_t class_size = sizeof(ObjectClass); | |
199 | int i; | |
200 | ||
201 | if (ti->class) { | |
202 | return; | |
203 | } | |
204 | ||
205 | ti->class_size = type_class_get_size(ti); | |
206 | ||
207 | ti->class = g_malloc0(ti->class_size); | |
208 | ti->class->type = ti; | |
209 | ||
210 | if (type_has_parent(ti)) { | |
211 | TypeImpl *parent = type_get_parent(ti); | |
212 | ||
213 | type_class_init(parent); | |
214 | ||
215 | class_size = parent->class_size; | |
216 | g_assert(parent->class_size <= ti->class_size); | |
217 | ||
218 | memcpy((void *)ti->class + sizeof(ObjectClass), | |
219 | (void *)parent->class + sizeof(ObjectClass), | |
220 | parent->class_size - sizeof(ObjectClass)); | |
221 | } | |
222 | ||
223 | memset((void *)ti->class + class_size, 0, ti->class_size - class_size); | |
224 | ||
225 | for (i = 0; i < ti->num_interfaces; i++) { | |
226 | type_class_interface_init(ti, &ti->interfaces[i]); | |
227 | } | |
228 | ||
229 | if (ti->class_init) { | |
230 | ti->class_init(ti->class, ti->class_data); | |
231 | } | |
232 | } | |
233 | ||
234 | static void object_interface_init(Object *obj, InterfaceImpl *iface) | |
235 | { | |
236 | TypeImpl *ti = iface->type; | |
237 | Interface *iface_obj; | |
238 | ||
239 | iface_obj = INTERFACE(object_new(ti->name)); | |
240 | iface_obj->obj = obj; | |
241 | ||
242 | obj->interfaces = g_slist_prepend(obj->interfaces, iface_obj); | |
243 | } | |
244 | ||
245 | static void object_init_with_type(Object *obj, TypeImpl *ti) | |
246 | { | |
247 | int i; | |
248 | ||
249 | if (type_has_parent(ti)) { | |
250 | object_init_with_type(obj, type_get_parent(ti)); | |
251 | } | |
252 | ||
253 | for (i = 0; i < ti->num_interfaces; i++) { | |
254 | object_interface_init(obj, &ti->interfaces[i]); | |
255 | } | |
256 | ||
257 | if (ti->instance_init) { | |
258 | ti->instance_init(obj); | |
259 | } | |
260 | } | |
261 | ||
262 | void object_initialize_with_type(void *data, TypeImpl *type) | |
263 | { | |
264 | Object *obj = data; | |
265 | ||
266 | g_assert(type != NULL); | |
258b2c42 | 267 | g_assert(type->instance_size >= sizeof(Object)); |
2f28d2ff AL |
268 | |
269 | type_class_init(type); | |
270 | g_assert(type->abstract == false); | |
271 | ||
272 | memset(obj, 0, type->instance_size); | |
273 | obj->class = type->class; | |
57c9fafe | 274 | QTAILQ_INIT(&obj->properties); |
2f28d2ff AL |
275 | object_init_with_type(obj, type); |
276 | } | |
277 | ||
278 | void object_initialize(void *data, const char *typename) | |
279 | { | |
280 | TypeImpl *type = type_get_by_name(typename); | |
281 | ||
282 | object_initialize_with_type(data, type); | |
283 | } | |
284 | ||
57c9fafe AL |
285 | static void object_property_del_all(Object *obj) |
286 | { | |
287 | while (!QTAILQ_EMPTY(&obj->properties)) { | |
288 | ObjectProperty *prop = QTAILQ_FIRST(&obj->properties); | |
289 | ||
290 | QTAILQ_REMOVE(&obj->properties, prop, node); | |
291 | ||
292 | if (prop->release) { | |
293 | prop->release(obj, prop->name, prop->opaque); | |
294 | } | |
295 | ||
296 | g_free(prop->name); | |
297 | g_free(prop->type); | |
298 | g_free(prop); | |
299 | } | |
300 | } | |
301 | ||
302 | static void object_property_del_child(Object *obj, Object *child, Error **errp) | |
303 | { | |
304 | ObjectProperty *prop; | |
305 | ||
306 | QTAILQ_FOREACH(prop, &obj->properties, node) { | |
6c1fdcf9 | 307 | if (strstart(prop->type, "child<", NULL) && prop->opaque == child) { |
57c9fafe | 308 | object_property_del(obj, prop->name, errp); |
6c1fdcf9 | 309 | break; |
57c9fafe AL |
310 | } |
311 | } | |
312 | } | |
313 | ||
314 | void object_unparent(Object *obj) | |
315 | { | |
316 | if (obj->parent) { | |
317 | object_property_del_child(obj->parent, obj, NULL); | |
318 | } | |
319 | } | |
320 | ||
2f28d2ff AL |
321 | static void object_deinit(Object *obj, TypeImpl *type) |
322 | { | |
323 | if (type->instance_finalize) { | |
324 | type->instance_finalize(obj); | |
325 | } | |
326 | ||
327 | while (obj->interfaces) { | |
328 | Interface *iface_obj = obj->interfaces->data; | |
329 | obj->interfaces = g_slist_delete_link(obj->interfaces, obj->interfaces); | |
330 | object_delete(OBJECT(iface_obj)); | |
331 | } | |
332 | ||
333 | if (type_has_parent(type)) { | |
334 | object_deinit(obj, type_get_parent(type)); | |
335 | } | |
57c9fafe AL |
336 | |
337 | object_unparent(obj); | |
2f28d2ff AL |
338 | } |
339 | ||
340 | void object_finalize(void *data) | |
341 | { | |
342 | Object *obj = data; | |
343 | TypeImpl *ti = obj->class->type; | |
344 | ||
345 | object_deinit(obj, ti); | |
57c9fafe | 346 | object_property_del_all(obj); |
db85b575 AL |
347 | |
348 | g_assert(obj->ref == 0); | |
2f28d2ff AL |
349 | } |
350 | ||
351 | Object *object_new_with_type(Type type) | |
352 | { | |
353 | Object *obj; | |
354 | ||
355 | g_assert(type != NULL); | |
356 | ||
357 | obj = g_malloc(type->instance_size); | |
358 | object_initialize_with_type(obj, type); | |
db85b575 | 359 | object_ref(obj); |
2f28d2ff AL |
360 | |
361 | return obj; | |
362 | } | |
363 | ||
364 | Object *object_new(const char *typename) | |
365 | { | |
366 | TypeImpl *ti = type_get_by_name(typename); | |
367 | ||
368 | return object_new_with_type(ti); | |
369 | } | |
370 | ||
371 | void object_delete(Object *obj) | |
372 | { | |
db85b575 AL |
373 | object_unref(obj); |
374 | g_assert(obj->ref == 0); | |
2f28d2ff AL |
375 | g_free(obj); |
376 | } | |
377 | ||
acc4af3f | 378 | static bool type_is_ancestor(TypeImpl *type, TypeImpl *target_type) |
2f28d2ff | 379 | { |
acc4af3f | 380 | assert(target_type); |
2f28d2ff AL |
381 | |
382 | /* Check if typename is a direct ancestor of type */ | |
383 | while (type) { | |
384 | if (type == target_type) { | |
385 | return true; | |
386 | } | |
387 | ||
388 | type = type_get_parent(type); | |
389 | } | |
390 | ||
acc4af3f PB |
391 | return false; |
392 | } | |
2f28d2ff | 393 | |
9970bd88 | 394 | static bool object_is_type(Object *obj, TypeImpl *target_type) |
acc4af3f | 395 | { |
9970bd88 | 396 | return !target_type || type_is_ancestor(obj->class->type, target_type); |
2f28d2ff AL |
397 | } |
398 | ||
399 | Object *object_dynamic_cast(Object *obj, const char *typename) | |
400 | { | |
9970bd88 | 401 | TypeImpl *target_type = type_get_by_name(typename); |
2f28d2ff AL |
402 | GSList *i; |
403 | ||
acc4af3f PB |
404 | /* Check if typename is a direct ancestor. Special-case TYPE_OBJECT, |
405 | * we want to go back from interfaces to the parent. | |
406 | */ | |
9970bd88 | 407 | if (target_type && object_is_type(obj, target_type)) { |
acc4af3f PB |
408 | return obj; |
409 | } | |
410 | ||
411 | /* Check if obj is an interface and its containing object is a direct | |
412 | * ancestor of typename. In principle we could do this test at the very | |
413 | * beginning of object_dynamic_cast, avoiding a second call to | |
414 | * object_is_type. However, casting between interfaces is relatively | |
9970bd88 | 415 | * rare, and object_is_type(obj, type_interface) would fail almost always. |
acc4af3f PB |
416 | * |
417 | * Perhaps we could add a magic value to the object header for increased | |
418 | * (run-time) type safety and to speed up tests like this one. If we ever | |
419 | * do that we can revisit the order here. | |
420 | */ | |
9970bd88 | 421 | if (object_is_type(obj, type_interface)) { |
acc4af3f PB |
422 | assert(!obj->interfaces); |
423 | obj = INTERFACE(obj)->obj; | |
9970bd88 | 424 | if (object_is_type(obj, target_type)) { |
acc4af3f PB |
425 | return obj; |
426 | } | |
427 | } | |
428 | ||
9970bd88 | 429 | if (!target_type) { |
2f28d2ff AL |
430 | return obj; |
431 | } | |
432 | ||
433 | /* Check if obj has an interface of typename */ | |
434 | for (i = obj->interfaces; i; i = i->next) { | |
435 | Interface *iface = i->data; | |
436 | ||
9970bd88 | 437 | if (object_is_type(OBJECT(iface), target_type)) { |
2f28d2ff AL |
438 | return OBJECT(iface); |
439 | } | |
440 | } | |
441 | ||
2f28d2ff AL |
442 | return NULL; |
443 | } | |
444 | ||
445 | ||
83f7d43a | 446 | static void register_types(void) |
2f28d2ff AL |
447 | { |
448 | static TypeInfo interface_info = { | |
449 | .name = TYPE_INTERFACE, | |
450 | .instance_size = sizeof(Interface), | |
451 | .abstract = true, | |
452 | }; | |
453 | ||
9970bd88 | 454 | type_interface = type_register_static(&interface_info); |
2f28d2ff AL |
455 | } |
456 | ||
83f7d43a | 457 | type_init(register_types) |
2f28d2ff AL |
458 | |
459 | Object *object_dynamic_cast_assert(Object *obj, const char *typename) | |
460 | { | |
461 | Object *inst; | |
462 | ||
463 | inst = object_dynamic_cast(obj, typename); | |
464 | ||
465 | if (!inst) { | |
466 | fprintf(stderr, "Object %p is not an instance of type %s\n", | |
467 | obj, typename); | |
468 | abort(); | |
469 | } | |
470 | ||
471 | return inst; | |
472 | } | |
473 | ||
474 | ObjectClass *object_class_dynamic_cast(ObjectClass *class, | |
475 | const char *typename) | |
476 | { | |
477 | TypeImpl *target_type = type_get_by_name(typename); | |
478 | TypeImpl *type = class->type; | |
479 | ||
480 | while (type) { | |
481 | if (type == target_type) { | |
482 | return class; | |
483 | } | |
484 | ||
485 | type = type_get_parent(type); | |
486 | } | |
487 | ||
488 | return NULL; | |
489 | } | |
490 | ||
491 | ObjectClass *object_class_dynamic_cast_assert(ObjectClass *class, | |
492 | const char *typename) | |
493 | { | |
494 | ObjectClass *ret = object_class_dynamic_cast(class, typename); | |
495 | ||
496 | if (!ret) { | |
497 | fprintf(stderr, "Object %p is not an instance of type %s\n", | |
498 | class, typename); | |
499 | abort(); | |
500 | } | |
501 | ||
502 | return ret; | |
503 | } | |
504 | ||
505 | const char *object_get_typename(Object *obj) | |
506 | { | |
507 | return obj->class->type->name; | |
508 | } | |
509 | ||
510 | ObjectClass *object_get_class(Object *obj) | |
511 | { | |
512 | return obj->class; | |
513 | } | |
514 | ||
515 | const char *object_class_get_name(ObjectClass *klass) | |
516 | { | |
517 | return klass->type->name; | |
518 | } | |
519 | ||
520 | ObjectClass *object_class_by_name(const char *typename) | |
521 | { | |
522 | TypeImpl *type = type_get_by_name(typename); | |
523 | ||
524 | if (!type) { | |
525 | return NULL; | |
526 | } | |
527 | ||
528 | type_class_init(type); | |
529 | ||
530 | return type->class; | |
531 | } | |
532 | ||
533 | typedef struct OCFData | |
534 | { | |
535 | void (*fn)(ObjectClass *klass, void *opaque); | |
93c511a1 AL |
536 | const char *implements_type; |
537 | bool include_abstract; | |
2f28d2ff AL |
538 | void *opaque; |
539 | } OCFData; | |
540 | ||
541 | static void object_class_foreach_tramp(gpointer key, gpointer value, | |
542 | gpointer opaque) | |
543 | { | |
544 | OCFData *data = opaque; | |
545 | TypeImpl *type = value; | |
93c511a1 | 546 | ObjectClass *k; |
2f28d2ff AL |
547 | |
548 | type_class_init(type); | |
93c511a1 | 549 | k = type->class; |
2f28d2ff | 550 | |
93c511a1 AL |
551 | if (!data->include_abstract && type->abstract) { |
552 | return; | |
553 | } | |
554 | ||
555 | if (data->implements_type && | |
556 | !object_class_dynamic_cast(k, data->implements_type)) { | |
557 | return; | |
558 | } | |
559 | ||
560 | data->fn(k, data->opaque); | |
2f28d2ff AL |
561 | } |
562 | ||
563 | void object_class_foreach(void (*fn)(ObjectClass *klass, void *opaque), | |
93c511a1 | 564 | const char *implements_type, bool include_abstract, |
2f28d2ff AL |
565 | void *opaque) |
566 | { | |
93c511a1 | 567 | OCFData data = { fn, implements_type, include_abstract, opaque }; |
2f28d2ff AL |
568 | |
569 | g_hash_table_foreach(type_table_get(), object_class_foreach_tramp, &data); | |
570 | } | |
57c9fafe AL |
571 | |
572 | void object_ref(Object *obj) | |
573 | { | |
574 | obj->ref++; | |
575 | } | |
576 | ||
577 | void object_unref(Object *obj) | |
578 | { | |
579 | g_assert(obj->ref > 0); | |
580 | obj->ref--; | |
581 | ||
582 | /* parent always holds a reference to its children */ | |
583 | if (obj->ref == 0) { | |
584 | object_finalize(obj); | |
585 | } | |
586 | } | |
587 | ||
588 | void object_property_add(Object *obj, const char *name, const char *type, | |
589 | ObjectPropertyAccessor *get, | |
590 | ObjectPropertyAccessor *set, | |
591 | ObjectPropertyRelease *release, | |
592 | void *opaque, Error **errp) | |
593 | { | |
594 | ObjectProperty *prop = g_malloc0(sizeof(*prop)); | |
595 | ||
596 | prop->name = g_strdup(name); | |
597 | prop->type = g_strdup(type); | |
598 | ||
599 | prop->get = get; | |
600 | prop->set = set; | |
601 | prop->release = release; | |
602 | prop->opaque = opaque; | |
603 | ||
604 | QTAILQ_INSERT_TAIL(&obj->properties, prop, node); | |
605 | } | |
606 | ||
607 | static ObjectProperty *object_property_find(Object *obj, const char *name) | |
608 | { | |
609 | ObjectProperty *prop; | |
610 | ||
611 | QTAILQ_FOREACH(prop, &obj->properties, node) { | |
612 | if (strcmp(prop->name, name) == 0) { | |
613 | return prop; | |
614 | } | |
615 | } | |
616 | ||
617 | return NULL; | |
618 | } | |
619 | ||
620 | void object_property_del(Object *obj, const char *name, Error **errp) | |
621 | { | |
622 | ObjectProperty *prop = object_property_find(obj, name); | |
623 | ||
624 | QTAILQ_REMOVE(&obj->properties, prop, node); | |
625 | ||
626 | prop->release(obj, prop->name, prop->opaque); | |
627 | ||
628 | g_free(prop->name); | |
629 | g_free(prop->type); | |
630 | g_free(prop); | |
631 | } | |
632 | ||
633 | void object_property_get(Object *obj, Visitor *v, const char *name, | |
634 | Error **errp) | |
635 | { | |
636 | ObjectProperty *prop = object_property_find(obj, name); | |
637 | ||
638 | if (prop == NULL) { | |
639 | error_set(errp, QERR_PROPERTY_NOT_FOUND, "", name); | |
640 | return; | |
641 | } | |
642 | ||
643 | if (!prop->get) { | |
644 | error_set(errp, QERR_PERMISSION_DENIED); | |
645 | } else { | |
646 | prop->get(obj, v, prop->opaque, name, errp); | |
647 | } | |
648 | } | |
649 | ||
650 | void object_property_set(Object *obj, Visitor *v, const char *name, | |
651 | Error **errp) | |
652 | { | |
653 | ObjectProperty *prop = object_property_find(obj, name); | |
654 | ||
655 | if (prop == NULL) { | |
656 | error_set(errp, QERR_PROPERTY_NOT_FOUND, "", name); | |
657 | return; | |
658 | } | |
659 | ||
660 | if (!prop->set) { | |
661 | error_set(errp, QERR_PERMISSION_DENIED); | |
662 | } else { | |
663 | prop->set(obj, v, prop->opaque, name, errp); | |
664 | } | |
665 | } | |
666 | ||
7b7b7d18 PB |
667 | void object_property_set_str(Object *obj, const char *value, |
668 | const char *name, Error **errp) | |
669 | { | |
670 | QString *qstr = qstring_from_str(value); | |
671 | object_property_set_qobject(obj, QOBJECT(qstr), name, errp); | |
672 | ||
673 | QDECREF(qstr); | |
674 | } | |
675 | ||
676 | char *object_property_get_str(Object *obj, const char *name, | |
677 | Error **errp) | |
678 | { | |
679 | QObject *ret = object_property_get_qobject(obj, name, errp); | |
680 | QString *qstring; | |
681 | char *retval; | |
682 | ||
683 | if (!ret) { | |
684 | return NULL; | |
685 | } | |
686 | qstring = qobject_to_qstring(ret); | |
687 | if (!qstring) { | |
688 | error_set(errp, QERR_INVALID_PARAMETER_TYPE, name, "string"); | |
689 | retval = NULL; | |
690 | } else { | |
691 | retval = g_strdup(qstring_get_str(qstring)); | |
692 | } | |
693 | ||
694 | QDECREF(qstring); | |
695 | return retval; | |
696 | } | |
697 | ||
1d9c5a12 PB |
698 | void object_property_set_link(Object *obj, Object *value, |
699 | const char *name, Error **errp) | |
700 | { | |
701 | object_property_set_str(obj, object_get_canonical_path(value), | |
702 | name, errp); | |
703 | } | |
704 | ||
705 | Object *object_property_get_link(Object *obj, const char *name, | |
706 | Error **errp) | |
707 | { | |
708 | char *str = object_property_get_str(obj, name, errp); | |
709 | Object *target = NULL; | |
710 | ||
711 | if (str && *str) { | |
712 | target = object_resolve_path(str, NULL); | |
713 | if (!target) { | |
714 | error_set(errp, QERR_DEVICE_NOT_FOUND, str); | |
715 | } | |
716 | } | |
717 | ||
718 | g_free(str); | |
719 | return target; | |
720 | } | |
721 | ||
7b7b7d18 PB |
722 | void object_property_set_bool(Object *obj, bool value, |
723 | const char *name, Error **errp) | |
724 | { | |
725 | QBool *qbool = qbool_from_int(value); | |
726 | object_property_set_qobject(obj, QOBJECT(qbool), name, errp); | |
727 | ||
728 | QDECREF(qbool); | |
729 | } | |
730 | ||
731 | bool object_property_get_bool(Object *obj, const char *name, | |
732 | Error **errp) | |
733 | { | |
734 | QObject *ret = object_property_get_qobject(obj, name, errp); | |
735 | QBool *qbool; | |
736 | bool retval; | |
737 | ||
738 | if (!ret) { | |
739 | return false; | |
740 | } | |
741 | qbool = qobject_to_qbool(ret); | |
742 | if (!qbool) { | |
743 | error_set(errp, QERR_INVALID_PARAMETER_TYPE, name, "boolean"); | |
744 | retval = false; | |
745 | } else { | |
746 | retval = qbool_get_int(qbool); | |
747 | } | |
748 | ||
749 | QDECREF(qbool); | |
750 | return retval; | |
751 | } | |
752 | ||
753 | void object_property_set_int(Object *obj, int64_t value, | |
754 | const char *name, Error **errp) | |
755 | { | |
756 | QInt *qint = qint_from_int(value); | |
757 | object_property_set_qobject(obj, QOBJECT(qint), name, errp); | |
758 | ||
759 | QDECREF(qint); | |
760 | } | |
761 | ||
762 | int64_t object_property_get_int(Object *obj, const char *name, | |
763 | Error **errp) | |
764 | { | |
765 | QObject *ret = object_property_get_qobject(obj, name, errp); | |
766 | QInt *qint; | |
767 | int64_t retval; | |
768 | ||
769 | if (!ret) { | |
770 | return -1; | |
771 | } | |
772 | qint = qobject_to_qint(ret); | |
773 | if (!qint) { | |
774 | error_set(errp, QERR_INVALID_PARAMETER_TYPE, name, "int"); | |
775 | retval = -1; | |
776 | } else { | |
777 | retval = qint_get_int(qint); | |
778 | } | |
779 | ||
780 | QDECREF(qint); | |
781 | return retval; | |
b2cd7dee PB |
782 | } |
783 | ||
784 | void object_property_parse(Object *obj, const char *string, | |
785 | const char *name, Error **errp) | |
786 | { | |
787 | StringInputVisitor *mi; | |
788 | mi = string_input_visitor_new(string); | |
789 | object_property_set(obj, string_input_get_visitor(mi), name, errp); | |
790 | ||
791 | string_input_visitor_cleanup(mi); | |
792 | } | |
793 | ||
794 | char *object_property_print(Object *obj, const char *name, | |
795 | Error **errp) | |
796 | { | |
797 | StringOutputVisitor *mo; | |
798 | char *string; | |
799 | ||
800 | mo = string_output_visitor_new(); | |
801 | object_property_get(obj, string_output_get_visitor(mo), name, NULL); | |
802 | string = string_output_get_string(mo); | |
803 | string_output_visitor_cleanup(mo); | |
804 | return string; | |
7b7b7d18 PB |
805 | } |
806 | ||
57c9fafe AL |
807 | const char *object_property_get_type(Object *obj, const char *name, Error **errp) |
808 | { | |
809 | ObjectProperty *prop = object_property_find(obj, name); | |
810 | ||
811 | if (prop == NULL) { | |
812 | error_set(errp, QERR_PROPERTY_NOT_FOUND, "", name); | |
813 | return NULL; | |
814 | } | |
815 | ||
816 | return prop->type; | |
817 | } | |
818 | ||
819 | Object *object_get_root(void) | |
820 | { | |
8b45d447 | 821 | static Object *root; |
57c9fafe | 822 | |
8b45d447 AL |
823 | if (!root) { |
824 | root = object_new("container"); | |
57c9fafe AL |
825 | } |
826 | ||
8b45d447 | 827 | return root; |
57c9fafe AL |
828 | } |
829 | ||
830 | static void object_get_child_property(Object *obj, Visitor *v, void *opaque, | |
831 | const char *name, Error **errp) | |
832 | { | |
833 | Object *child = opaque; | |
834 | gchar *path; | |
835 | ||
836 | path = object_get_canonical_path(child); | |
837 | visit_type_str(v, &path, name, errp); | |
838 | g_free(path); | |
839 | } | |
840 | ||
db85b575 AL |
841 | static void object_finalize_child_property(Object *obj, const char *name, |
842 | void *opaque) | |
843 | { | |
844 | Object *child = opaque; | |
845 | ||
846 | object_unref(child); | |
847 | } | |
848 | ||
57c9fafe AL |
849 | void object_property_add_child(Object *obj, const char *name, |
850 | Object *child, Error **errp) | |
851 | { | |
852 | gchar *type; | |
853 | ||
a1e7efdc PB |
854 | /* Registering an interface object in the composition tree will mightily |
855 | * confuse object_get_canonical_path (which, on the other hand, knows how | |
856 | * to get the canonical path of an interface object). | |
857 | */ | |
858 | assert(!object_is_type(obj, type_interface)); | |
859 | ||
57c9fafe AL |
860 | type = g_strdup_printf("child<%s>", object_get_typename(OBJECT(child))); |
861 | ||
862 | object_property_add(obj, name, type, object_get_child_property, | |
db85b575 | 863 | NULL, object_finalize_child_property, child, errp); |
57c9fafe AL |
864 | |
865 | object_ref(child); | |
866 | g_assert(child->parent == NULL); | |
867 | child->parent = obj; | |
868 | ||
869 | g_free(type); | |
870 | } | |
871 | ||
872 | static void object_get_link_property(Object *obj, Visitor *v, void *opaque, | |
873 | const char *name, Error **errp) | |
874 | { | |
875 | Object **child = opaque; | |
876 | gchar *path; | |
877 | ||
878 | if (*child) { | |
879 | path = object_get_canonical_path(*child); | |
880 | visit_type_str(v, &path, name, errp); | |
881 | g_free(path); | |
882 | } else { | |
883 | path = (gchar *)""; | |
884 | visit_type_str(v, &path, name, errp); | |
885 | } | |
886 | } | |
887 | ||
888 | static void object_set_link_property(Object *obj, Visitor *v, void *opaque, | |
889 | const char *name, Error **errp) | |
890 | { | |
891 | Object **child = opaque; | |
f0cdc966 | 892 | Object *old_target; |
57c9fafe AL |
893 | bool ambiguous = false; |
894 | const char *type; | |
895 | char *path; | |
11e35bfd | 896 | gchar *target_type; |
57c9fafe AL |
897 | |
898 | type = object_property_get_type(obj, name, NULL); | |
899 | ||
900 | visit_type_str(v, &path, name, errp); | |
901 | ||
f0cdc966 AB |
902 | old_target = *child; |
903 | *child = NULL; | |
57c9fafe AL |
904 | |
905 | if (strcmp(path, "") != 0) { | |
906 | Object *target; | |
907 | ||
11e35bfd PB |
908 | /* Go from link<FOO> to FOO. */ |
909 | target_type = g_strndup(&type[5], strlen(type) - 6); | |
910 | target = object_resolve_path_type(path, target_type, &ambiguous); | |
57c9fafe | 911 | |
11e35bfd PB |
912 | if (ambiguous) { |
913 | error_set(errp, QERR_AMBIGUOUS_PATH, path); | |
914 | } else if (target) { | |
915 | object_ref(target); | |
916 | *child = target; | |
57c9fafe | 917 | } else { |
11e35bfd PB |
918 | target = object_resolve_path(path, &ambiguous); |
919 | if (target || ambiguous) { | |
920 | error_set(errp, QERR_INVALID_PARAMETER_TYPE, name, target_type); | |
921 | } else { | |
922 | error_set(errp, QERR_DEVICE_NOT_FOUND, path); | |
923 | } | |
57c9fafe | 924 | } |
11e35bfd | 925 | g_free(target_type); |
57c9fafe AL |
926 | } |
927 | ||
928 | g_free(path); | |
f0cdc966 AB |
929 | |
930 | if (old_target != NULL) { | |
931 | object_unref(old_target); | |
932 | } | |
57c9fafe AL |
933 | } |
934 | ||
935 | void object_property_add_link(Object *obj, const char *name, | |
936 | const char *type, Object **child, | |
937 | Error **errp) | |
938 | { | |
939 | gchar *full_type; | |
940 | ||
941 | full_type = g_strdup_printf("link<%s>", type); | |
942 | ||
943 | object_property_add(obj, name, full_type, | |
944 | object_get_link_property, | |
945 | object_set_link_property, | |
946 | NULL, child, errp); | |
947 | ||
948 | g_free(full_type); | |
949 | } | |
950 | ||
951 | gchar *object_get_canonical_path(Object *obj) | |
952 | { | |
953 | Object *root = object_get_root(); | |
954 | char *newpath = NULL, *path = NULL; | |
955 | ||
a1e7efdc PB |
956 | if (object_is_type(obj, type_interface)) { |
957 | obj = INTERFACE(obj)->obj; | |
958 | } | |
959 | ||
57c9fafe AL |
960 | while (obj != root) { |
961 | ObjectProperty *prop = NULL; | |
962 | ||
963 | g_assert(obj->parent != NULL); | |
964 | ||
965 | QTAILQ_FOREACH(prop, &obj->parent->properties, node) { | |
966 | if (!strstart(prop->type, "child<", NULL)) { | |
967 | continue; | |
968 | } | |
969 | ||
970 | if (prop->opaque == obj) { | |
971 | if (path) { | |
972 | newpath = g_strdup_printf("%s/%s", prop->name, path); | |
973 | g_free(path); | |
974 | path = newpath; | |
975 | } else { | |
976 | path = g_strdup(prop->name); | |
977 | } | |
978 | break; | |
979 | } | |
980 | } | |
981 | ||
982 | g_assert(prop != NULL); | |
983 | ||
984 | obj = obj->parent; | |
985 | } | |
986 | ||
987 | newpath = g_strdup_printf("/%s", path); | |
988 | g_free(path); | |
989 | ||
990 | return newpath; | |
991 | } | |
992 | ||
993 | static Object *object_resolve_abs_path(Object *parent, | |
994 | gchar **parts, | |
02fe2db6 | 995 | const char *typename, |
57c9fafe AL |
996 | int index) |
997 | { | |
998 | ObjectProperty *prop; | |
999 | Object *child; | |
1000 | ||
1001 | if (parts[index] == NULL) { | |
02fe2db6 | 1002 | return object_dynamic_cast(parent, typename); |
57c9fafe AL |
1003 | } |
1004 | ||
1005 | if (strcmp(parts[index], "") == 0) { | |
02fe2db6 | 1006 | return object_resolve_abs_path(parent, parts, typename, index + 1); |
57c9fafe AL |
1007 | } |
1008 | ||
1009 | prop = object_property_find(parent, parts[index]); | |
1010 | if (prop == NULL) { | |
1011 | return NULL; | |
1012 | } | |
1013 | ||
1014 | child = NULL; | |
1015 | if (strstart(prop->type, "link<", NULL)) { | |
1016 | Object **pchild = prop->opaque; | |
1017 | if (*pchild) { | |
1018 | child = *pchild; | |
1019 | } | |
1020 | } else if (strstart(prop->type, "child<", NULL)) { | |
1021 | child = prop->opaque; | |
1022 | } | |
1023 | ||
1024 | if (!child) { | |
1025 | return NULL; | |
1026 | } | |
1027 | ||
02fe2db6 | 1028 | return object_resolve_abs_path(child, parts, typename, index + 1); |
57c9fafe AL |
1029 | } |
1030 | ||
1031 | static Object *object_resolve_partial_path(Object *parent, | |
1032 | gchar **parts, | |
02fe2db6 | 1033 | const char *typename, |
57c9fafe AL |
1034 | bool *ambiguous) |
1035 | { | |
1036 | Object *obj; | |
1037 | ObjectProperty *prop; | |
1038 | ||
02fe2db6 | 1039 | obj = object_resolve_abs_path(parent, parts, typename, 0); |
57c9fafe AL |
1040 | |
1041 | QTAILQ_FOREACH(prop, &parent->properties, node) { | |
1042 | Object *found; | |
1043 | ||
1044 | if (!strstart(prop->type, "child<", NULL)) { | |
1045 | continue; | |
1046 | } | |
1047 | ||
02fe2db6 PB |
1048 | found = object_resolve_partial_path(prop->opaque, parts, |
1049 | typename, ambiguous); | |
57c9fafe AL |
1050 | if (found) { |
1051 | if (obj) { | |
1052 | if (ambiguous) { | |
1053 | *ambiguous = true; | |
1054 | } | |
1055 | return NULL; | |
1056 | } | |
1057 | obj = found; | |
1058 | } | |
1059 | ||
1060 | if (ambiguous && *ambiguous) { | |
1061 | return NULL; | |
1062 | } | |
1063 | } | |
1064 | ||
1065 | return obj; | |
1066 | } | |
1067 | ||
02fe2db6 PB |
1068 | Object *object_resolve_path_type(const char *path, const char *typename, |
1069 | bool *ambiguous) | |
57c9fafe AL |
1070 | { |
1071 | bool partial_path = true; | |
1072 | Object *obj; | |
1073 | gchar **parts; | |
1074 | ||
1075 | parts = g_strsplit(path, "/", 0); | |
1076 | if (parts == NULL || parts[0] == NULL) { | |
1077 | g_strfreev(parts); | |
1078 | return object_get_root(); | |
1079 | } | |
1080 | ||
1081 | if (strcmp(parts[0], "") == 0) { | |
1082 | partial_path = false; | |
1083 | } | |
1084 | ||
1085 | if (partial_path) { | |
1086 | if (ambiguous) { | |
1087 | *ambiguous = false; | |
1088 | } | |
02fe2db6 PB |
1089 | obj = object_resolve_partial_path(object_get_root(), parts, |
1090 | typename, ambiguous); | |
57c9fafe | 1091 | } else { |
02fe2db6 | 1092 | obj = object_resolve_abs_path(object_get_root(), parts, typename, 1); |
57c9fafe AL |
1093 | } |
1094 | ||
1095 | g_strfreev(parts); | |
1096 | ||
1097 | return obj; | |
1098 | } | |
1099 | ||
02fe2db6 PB |
1100 | Object *object_resolve_path(const char *path, bool *ambiguous) |
1101 | { | |
1102 | return object_resolve_path_type(path, TYPE_OBJECT, ambiguous); | |
1103 | } | |
1104 | ||
57c9fafe AL |
1105 | typedef struct StringProperty |
1106 | { | |
1107 | char *(*get)(Object *, Error **); | |
1108 | void (*set)(Object *, const char *, Error **); | |
1109 | } StringProperty; | |
1110 | ||
7b7b7d18 PB |
1111 | static void property_get_str(Object *obj, Visitor *v, void *opaque, |
1112 | const char *name, Error **errp) | |
57c9fafe AL |
1113 | { |
1114 | StringProperty *prop = opaque; | |
1115 | char *value; | |
1116 | ||
1117 | value = prop->get(obj, errp); | |
1118 | if (value) { | |
1119 | visit_type_str(v, &value, name, errp); | |
1120 | g_free(value); | |
1121 | } | |
1122 | } | |
1123 | ||
7b7b7d18 PB |
1124 | static void property_set_str(Object *obj, Visitor *v, void *opaque, |
1125 | const char *name, Error **errp) | |
57c9fafe AL |
1126 | { |
1127 | StringProperty *prop = opaque; | |
1128 | char *value; | |
1129 | Error *local_err = NULL; | |
1130 | ||
1131 | visit_type_str(v, &value, name, &local_err); | |
1132 | if (local_err) { | |
1133 | error_propagate(errp, local_err); | |
1134 | return; | |
1135 | } | |
1136 | ||
1137 | prop->set(obj, value, errp); | |
1138 | g_free(value); | |
1139 | } | |
1140 | ||
7b7b7d18 PB |
1141 | static void property_release_str(Object *obj, const char *name, |
1142 | void *opaque) | |
57c9fafe AL |
1143 | { |
1144 | StringProperty *prop = opaque; | |
1145 | g_free(prop); | |
1146 | } | |
1147 | ||
1148 | void object_property_add_str(Object *obj, const char *name, | |
1149 | char *(*get)(Object *, Error **), | |
1150 | void (*set)(Object *, const char *, Error **), | |
1151 | Error **errp) | |
1152 | { | |
1153 | StringProperty *prop = g_malloc0(sizeof(*prop)); | |
1154 | ||
1155 | prop->get = get; | |
1156 | prop->set = set; | |
1157 | ||
1158 | object_property_add(obj, name, "string", | |
7b7b7d18 PB |
1159 | get ? property_get_str : NULL, |
1160 | set ? property_set_str : NULL, | |
1161 | property_release_str, | |
57c9fafe AL |
1162 | prop, errp); |
1163 | } |