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Commit | Line | Data |
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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 | ||
aca59af6 IM |
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 | ||
2f28d2ff AL |
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 | ||
ac451033 | 209 | static void type_initialize(TypeImpl *ti) |
2f28d2ff AL |
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); | |
aca59af6 | 219 | ti->instance_size = type_object_get_size(ti); |
2f28d2ff AL |
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 | ||
ac451033 | 227 | type_initialize(parent); |
2f28d2ff AL |
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); | |
ac451033 | 281 | type_initialize(type); |
aca59af6 IM |
282 | |
283 | g_assert(type->instance_size >= sizeof(Object)); | |
2f28d2ff AL |
284 | g_assert(type->abstract == false); |
285 | ||
286 | memset(obj, 0, type->instance_size); | |
287 | obj->class = type->class; | |
57c9fafe | 288 | QTAILQ_INIT(&obj->properties); |
2f28d2ff AL |
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 | ||
5d9d3f47 AF |
299 | static inline bool object_property_is_child(ObjectProperty *prop) |
300 | { | |
301 | return strstart(prop->type, "child<", NULL); | |
302 | } | |
303 | ||
304 | static inline bool object_property_is_link(ObjectProperty *prop) | |
305 | { | |
306 | return strstart(prop->type, "link<", NULL); | |
307 | } | |
308 | ||
57c9fafe AL |
309 | static void object_property_del_all(Object *obj) |
310 | { | |
311 | while (!QTAILQ_EMPTY(&obj->properties)) { | |
312 | ObjectProperty *prop = QTAILQ_FIRST(&obj->properties); | |
313 | ||
314 | QTAILQ_REMOVE(&obj->properties, prop, node); | |
315 | ||
316 | if (prop->release) { | |
317 | prop->release(obj, prop->name, prop->opaque); | |
318 | } | |
319 | ||
320 | g_free(prop->name); | |
321 | g_free(prop->type); | |
322 | g_free(prop); | |
323 | } | |
324 | } | |
325 | ||
326 | static void object_property_del_child(Object *obj, Object *child, Error **errp) | |
327 | { | |
328 | ObjectProperty *prop; | |
329 | ||
330 | QTAILQ_FOREACH(prop, &obj->properties, node) { | |
5d9d3f47 | 331 | if (object_property_is_child(prop) && prop->opaque == child) { |
57c9fafe | 332 | object_property_del(obj, prop->name, errp); |
6c1fdcf9 | 333 | break; |
57c9fafe AL |
334 | } |
335 | } | |
336 | } | |
337 | ||
338 | void object_unparent(Object *obj) | |
339 | { | |
340 | if (obj->parent) { | |
341 | object_property_del_child(obj->parent, obj, NULL); | |
342 | } | |
343 | } | |
344 | ||
2f28d2ff AL |
345 | static void object_deinit(Object *obj, TypeImpl *type) |
346 | { | |
347 | if (type->instance_finalize) { | |
348 | type->instance_finalize(obj); | |
349 | } | |
350 | ||
351 | while (obj->interfaces) { | |
352 | Interface *iface_obj = obj->interfaces->data; | |
353 | obj->interfaces = g_slist_delete_link(obj->interfaces, obj->interfaces); | |
354 | object_delete(OBJECT(iface_obj)); | |
355 | } | |
356 | ||
357 | if (type_has_parent(type)) { | |
358 | object_deinit(obj, type_get_parent(type)); | |
359 | } | |
57c9fafe AL |
360 | |
361 | object_unparent(obj); | |
2f28d2ff AL |
362 | } |
363 | ||
364 | void object_finalize(void *data) | |
365 | { | |
366 | Object *obj = data; | |
367 | TypeImpl *ti = obj->class->type; | |
368 | ||
369 | object_deinit(obj, ti); | |
57c9fafe | 370 | object_property_del_all(obj); |
db85b575 AL |
371 | |
372 | g_assert(obj->ref == 0); | |
2f28d2ff AL |
373 | } |
374 | ||
375 | Object *object_new_with_type(Type type) | |
376 | { | |
377 | Object *obj; | |
378 | ||
379 | g_assert(type != NULL); | |
ac451033 | 380 | type_initialize(type); |
2f28d2ff AL |
381 | |
382 | obj = g_malloc(type->instance_size); | |
383 | object_initialize_with_type(obj, type); | |
db85b575 | 384 | object_ref(obj); |
2f28d2ff AL |
385 | |
386 | return obj; | |
387 | } | |
388 | ||
389 | Object *object_new(const char *typename) | |
390 | { | |
391 | TypeImpl *ti = type_get_by_name(typename); | |
392 | ||
393 | return object_new_with_type(ti); | |
394 | } | |
395 | ||
396 | void object_delete(Object *obj) | |
397 | { | |
db85b575 AL |
398 | object_unref(obj); |
399 | g_assert(obj->ref == 0); | |
2f28d2ff AL |
400 | g_free(obj); |
401 | } | |
402 | ||
acc4af3f | 403 | static bool type_is_ancestor(TypeImpl *type, TypeImpl *target_type) |
2f28d2ff | 404 | { |
acc4af3f | 405 | assert(target_type); |
2f28d2ff AL |
406 | |
407 | /* Check if typename is a direct ancestor of type */ | |
408 | while (type) { | |
409 | if (type == target_type) { | |
410 | return true; | |
411 | } | |
412 | ||
413 | type = type_get_parent(type); | |
414 | } | |
415 | ||
acc4af3f PB |
416 | return false; |
417 | } | |
2f28d2ff | 418 | |
9970bd88 | 419 | static bool object_is_type(Object *obj, TypeImpl *target_type) |
acc4af3f | 420 | { |
9970bd88 | 421 | return !target_type || type_is_ancestor(obj->class->type, target_type); |
2f28d2ff AL |
422 | } |
423 | ||
424 | Object *object_dynamic_cast(Object *obj, const char *typename) | |
425 | { | |
9970bd88 | 426 | TypeImpl *target_type = type_get_by_name(typename); |
2f28d2ff AL |
427 | GSList *i; |
428 | ||
acc4af3f PB |
429 | /* Check if typename is a direct ancestor. Special-case TYPE_OBJECT, |
430 | * we want to go back from interfaces to the parent. | |
431 | */ | |
9970bd88 | 432 | if (target_type && object_is_type(obj, target_type)) { |
acc4af3f PB |
433 | return obj; |
434 | } | |
435 | ||
436 | /* Check if obj is an interface and its containing object is a direct | |
437 | * ancestor of typename. In principle we could do this test at the very | |
438 | * beginning of object_dynamic_cast, avoiding a second call to | |
439 | * object_is_type. However, casting between interfaces is relatively | |
9970bd88 | 440 | * rare, and object_is_type(obj, type_interface) would fail almost always. |
acc4af3f PB |
441 | * |
442 | * Perhaps we could add a magic value to the object header for increased | |
443 | * (run-time) type safety and to speed up tests like this one. If we ever | |
444 | * do that we can revisit the order here. | |
445 | */ | |
9970bd88 | 446 | if (object_is_type(obj, type_interface)) { |
acc4af3f PB |
447 | assert(!obj->interfaces); |
448 | obj = INTERFACE(obj)->obj; | |
9970bd88 | 449 | if (object_is_type(obj, target_type)) { |
acc4af3f PB |
450 | return obj; |
451 | } | |
452 | } | |
453 | ||
9970bd88 | 454 | if (!target_type) { |
2f28d2ff AL |
455 | return obj; |
456 | } | |
457 | ||
458 | /* Check if obj has an interface of typename */ | |
459 | for (i = obj->interfaces; i; i = i->next) { | |
460 | Interface *iface = i->data; | |
461 | ||
9970bd88 | 462 | if (object_is_type(OBJECT(iface), target_type)) { |
2f28d2ff AL |
463 | return OBJECT(iface); |
464 | } | |
465 | } | |
466 | ||
2f28d2ff AL |
467 | return NULL; |
468 | } | |
469 | ||
470 | ||
83f7d43a | 471 | static void register_types(void) |
2f28d2ff AL |
472 | { |
473 | static TypeInfo interface_info = { | |
474 | .name = TYPE_INTERFACE, | |
475 | .instance_size = sizeof(Interface), | |
476 | .abstract = true, | |
477 | }; | |
478 | ||
9970bd88 | 479 | type_interface = type_register_static(&interface_info); |
2f28d2ff AL |
480 | } |
481 | ||
83f7d43a | 482 | type_init(register_types) |
2f28d2ff AL |
483 | |
484 | Object *object_dynamic_cast_assert(Object *obj, const char *typename) | |
485 | { | |
486 | Object *inst; | |
487 | ||
488 | inst = object_dynamic_cast(obj, typename); | |
489 | ||
490 | if (!inst) { | |
491 | fprintf(stderr, "Object %p is not an instance of type %s\n", | |
492 | obj, typename); | |
493 | abort(); | |
494 | } | |
495 | ||
496 | return inst; | |
497 | } | |
498 | ||
499 | ObjectClass *object_class_dynamic_cast(ObjectClass *class, | |
500 | const char *typename) | |
501 | { | |
502 | TypeImpl *target_type = type_get_by_name(typename); | |
503 | TypeImpl *type = class->type; | |
504 | ||
505 | while (type) { | |
506 | if (type == target_type) { | |
507 | return class; | |
508 | } | |
509 | ||
510 | type = type_get_parent(type); | |
511 | } | |
512 | ||
513 | return NULL; | |
514 | } | |
515 | ||
516 | ObjectClass *object_class_dynamic_cast_assert(ObjectClass *class, | |
517 | const char *typename) | |
518 | { | |
519 | ObjectClass *ret = object_class_dynamic_cast(class, typename); | |
520 | ||
521 | if (!ret) { | |
522 | fprintf(stderr, "Object %p is not an instance of type %s\n", | |
523 | class, typename); | |
524 | abort(); | |
525 | } | |
526 | ||
527 | return ret; | |
528 | } | |
529 | ||
530 | const char *object_get_typename(Object *obj) | |
531 | { | |
532 | return obj->class->type->name; | |
533 | } | |
534 | ||
535 | ObjectClass *object_get_class(Object *obj) | |
536 | { | |
537 | return obj->class; | |
538 | } | |
539 | ||
540 | const char *object_class_get_name(ObjectClass *klass) | |
541 | { | |
542 | return klass->type->name; | |
543 | } | |
544 | ||
545 | ObjectClass *object_class_by_name(const char *typename) | |
546 | { | |
547 | TypeImpl *type = type_get_by_name(typename); | |
548 | ||
549 | if (!type) { | |
550 | return NULL; | |
551 | } | |
552 | ||
ac451033 | 553 | type_initialize(type); |
2f28d2ff AL |
554 | |
555 | return type->class; | |
556 | } | |
557 | ||
e7cce67f PB |
558 | ObjectClass *object_class_get_parent(ObjectClass *class) |
559 | { | |
560 | TypeImpl *type = type_get_parent(class->type); | |
561 | ||
562 | if (!type) { | |
563 | return NULL; | |
564 | } | |
565 | ||
566 | type_initialize(type); | |
567 | ||
568 | return type->class; | |
569 | } | |
570 | ||
2f28d2ff AL |
571 | typedef struct OCFData |
572 | { | |
573 | void (*fn)(ObjectClass *klass, void *opaque); | |
93c511a1 AL |
574 | const char *implements_type; |
575 | bool include_abstract; | |
2f28d2ff AL |
576 | void *opaque; |
577 | } OCFData; | |
578 | ||
579 | static void object_class_foreach_tramp(gpointer key, gpointer value, | |
580 | gpointer opaque) | |
581 | { | |
582 | OCFData *data = opaque; | |
583 | TypeImpl *type = value; | |
93c511a1 | 584 | ObjectClass *k; |
2f28d2ff | 585 | |
ac451033 | 586 | type_initialize(type); |
93c511a1 | 587 | k = type->class; |
2f28d2ff | 588 | |
93c511a1 AL |
589 | if (!data->include_abstract && type->abstract) { |
590 | return; | |
591 | } | |
592 | ||
593 | if (data->implements_type && | |
594 | !object_class_dynamic_cast(k, data->implements_type)) { | |
595 | return; | |
596 | } | |
597 | ||
598 | data->fn(k, data->opaque); | |
2f28d2ff AL |
599 | } |
600 | ||
601 | void object_class_foreach(void (*fn)(ObjectClass *klass, void *opaque), | |
93c511a1 | 602 | const char *implements_type, bool include_abstract, |
2f28d2ff AL |
603 | void *opaque) |
604 | { | |
93c511a1 | 605 | OCFData data = { fn, implements_type, include_abstract, opaque }; |
2f28d2ff AL |
606 | |
607 | g_hash_table_foreach(type_table_get(), object_class_foreach_tramp, &data); | |
608 | } | |
57c9fafe | 609 | |
418ba9e5 AF |
610 | static void object_class_get_list_tramp(ObjectClass *klass, void *opaque) |
611 | { | |
612 | GSList **list = opaque; | |
613 | ||
614 | *list = g_slist_prepend(*list, klass); | |
615 | } | |
616 | ||
617 | GSList *object_class_get_list(const char *implements_type, | |
618 | bool include_abstract) | |
619 | { | |
620 | GSList *list = NULL; | |
621 | ||
622 | object_class_foreach(object_class_get_list_tramp, | |
623 | implements_type, include_abstract, &list); | |
624 | return list; | |
625 | } | |
626 | ||
57c9fafe AL |
627 | void object_ref(Object *obj) |
628 | { | |
629 | obj->ref++; | |
630 | } | |
631 | ||
632 | void object_unref(Object *obj) | |
633 | { | |
634 | g_assert(obj->ref > 0); | |
635 | obj->ref--; | |
636 | ||
637 | /* parent always holds a reference to its children */ | |
638 | if (obj->ref == 0) { | |
639 | object_finalize(obj); | |
640 | } | |
641 | } | |
642 | ||
643 | void object_property_add(Object *obj, const char *name, const char *type, | |
644 | ObjectPropertyAccessor *get, | |
645 | ObjectPropertyAccessor *set, | |
646 | ObjectPropertyRelease *release, | |
647 | void *opaque, Error **errp) | |
648 | { | |
649 | ObjectProperty *prop = g_malloc0(sizeof(*prop)); | |
650 | ||
651 | prop->name = g_strdup(name); | |
652 | prop->type = g_strdup(type); | |
653 | ||
654 | prop->get = get; | |
655 | prop->set = set; | |
656 | prop->release = release; | |
657 | prop->opaque = opaque; | |
658 | ||
659 | QTAILQ_INSERT_TAIL(&obj->properties, prop, node); | |
660 | } | |
661 | ||
662 | static ObjectProperty *object_property_find(Object *obj, const char *name) | |
663 | { | |
664 | ObjectProperty *prop; | |
665 | ||
666 | QTAILQ_FOREACH(prop, &obj->properties, node) { | |
667 | if (strcmp(prop->name, name) == 0) { | |
668 | return prop; | |
669 | } | |
670 | } | |
671 | ||
672 | return NULL; | |
673 | } | |
674 | ||
675 | void object_property_del(Object *obj, const char *name, Error **errp) | |
676 | { | |
677 | ObjectProperty *prop = object_property_find(obj, name); | |
678 | ||
679 | QTAILQ_REMOVE(&obj->properties, prop, node); | |
680 | ||
681 | prop->release(obj, prop->name, prop->opaque); | |
682 | ||
683 | g_free(prop->name); | |
684 | g_free(prop->type); | |
685 | g_free(prop); | |
686 | } | |
687 | ||
688 | void object_property_get(Object *obj, Visitor *v, const char *name, | |
689 | Error **errp) | |
690 | { | |
691 | ObjectProperty *prop = object_property_find(obj, name); | |
692 | ||
693 | if (prop == NULL) { | |
694 | error_set(errp, QERR_PROPERTY_NOT_FOUND, "", name); | |
695 | return; | |
696 | } | |
697 | ||
698 | if (!prop->get) { | |
699 | error_set(errp, QERR_PERMISSION_DENIED); | |
700 | } else { | |
701 | prop->get(obj, v, prop->opaque, name, errp); | |
702 | } | |
703 | } | |
704 | ||
705 | void object_property_set(Object *obj, Visitor *v, const char *name, | |
706 | Error **errp) | |
707 | { | |
708 | ObjectProperty *prop = object_property_find(obj, name); | |
709 | ||
710 | if (prop == NULL) { | |
711 | error_set(errp, QERR_PROPERTY_NOT_FOUND, "", name); | |
712 | return; | |
713 | } | |
714 | ||
715 | if (!prop->set) { | |
716 | error_set(errp, QERR_PERMISSION_DENIED); | |
717 | } else { | |
718 | prop->set(obj, v, prop->opaque, name, errp); | |
719 | } | |
720 | } | |
721 | ||
7b7b7d18 PB |
722 | void object_property_set_str(Object *obj, const char *value, |
723 | const char *name, Error **errp) | |
724 | { | |
725 | QString *qstr = qstring_from_str(value); | |
726 | object_property_set_qobject(obj, QOBJECT(qstr), name, errp); | |
727 | ||
728 | QDECREF(qstr); | |
729 | } | |
730 | ||
731 | char *object_property_get_str(Object *obj, const char *name, | |
732 | Error **errp) | |
733 | { | |
734 | QObject *ret = object_property_get_qobject(obj, name, errp); | |
735 | QString *qstring; | |
736 | char *retval; | |
737 | ||
738 | if (!ret) { | |
739 | return NULL; | |
740 | } | |
741 | qstring = qobject_to_qstring(ret); | |
742 | if (!qstring) { | |
743 | error_set(errp, QERR_INVALID_PARAMETER_TYPE, name, "string"); | |
744 | retval = NULL; | |
745 | } else { | |
746 | retval = g_strdup(qstring_get_str(qstring)); | |
747 | } | |
748 | ||
749 | QDECREF(qstring); | |
750 | return retval; | |
751 | } | |
752 | ||
1d9c5a12 PB |
753 | void object_property_set_link(Object *obj, Object *value, |
754 | const char *name, Error **errp) | |
755 | { | |
756 | object_property_set_str(obj, object_get_canonical_path(value), | |
757 | name, errp); | |
758 | } | |
759 | ||
760 | Object *object_property_get_link(Object *obj, const char *name, | |
761 | Error **errp) | |
762 | { | |
763 | char *str = object_property_get_str(obj, name, errp); | |
764 | Object *target = NULL; | |
765 | ||
766 | if (str && *str) { | |
767 | target = object_resolve_path(str, NULL); | |
768 | if (!target) { | |
769 | error_set(errp, QERR_DEVICE_NOT_FOUND, str); | |
770 | } | |
771 | } | |
772 | ||
773 | g_free(str); | |
774 | return target; | |
775 | } | |
776 | ||
7b7b7d18 PB |
777 | void object_property_set_bool(Object *obj, bool value, |
778 | const char *name, Error **errp) | |
779 | { | |
780 | QBool *qbool = qbool_from_int(value); | |
781 | object_property_set_qobject(obj, QOBJECT(qbool), name, errp); | |
782 | ||
783 | QDECREF(qbool); | |
784 | } | |
785 | ||
786 | bool object_property_get_bool(Object *obj, const char *name, | |
787 | Error **errp) | |
788 | { | |
789 | QObject *ret = object_property_get_qobject(obj, name, errp); | |
790 | QBool *qbool; | |
791 | bool retval; | |
792 | ||
793 | if (!ret) { | |
794 | return false; | |
795 | } | |
796 | qbool = qobject_to_qbool(ret); | |
797 | if (!qbool) { | |
798 | error_set(errp, QERR_INVALID_PARAMETER_TYPE, name, "boolean"); | |
799 | retval = false; | |
800 | } else { | |
801 | retval = qbool_get_int(qbool); | |
802 | } | |
803 | ||
804 | QDECREF(qbool); | |
805 | return retval; | |
806 | } | |
807 | ||
808 | void object_property_set_int(Object *obj, int64_t value, | |
809 | const char *name, Error **errp) | |
810 | { | |
811 | QInt *qint = qint_from_int(value); | |
812 | object_property_set_qobject(obj, QOBJECT(qint), name, errp); | |
813 | ||
814 | QDECREF(qint); | |
815 | } | |
816 | ||
817 | int64_t object_property_get_int(Object *obj, const char *name, | |
818 | Error **errp) | |
819 | { | |
820 | QObject *ret = object_property_get_qobject(obj, name, errp); | |
821 | QInt *qint; | |
822 | int64_t retval; | |
823 | ||
824 | if (!ret) { | |
825 | return -1; | |
826 | } | |
827 | qint = qobject_to_qint(ret); | |
828 | if (!qint) { | |
829 | error_set(errp, QERR_INVALID_PARAMETER_TYPE, name, "int"); | |
830 | retval = -1; | |
831 | } else { | |
832 | retval = qint_get_int(qint); | |
833 | } | |
834 | ||
835 | QDECREF(qint); | |
836 | return retval; | |
b2cd7dee PB |
837 | } |
838 | ||
839 | void object_property_parse(Object *obj, const char *string, | |
840 | const char *name, Error **errp) | |
841 | { | |
842 | StringInputVisitor *mi; | |
843 | mi = string_input_visitor_new(string); | |
844 | object_property_set(obj, string_input_get_visitor(mi), name, errp); | |
845 | ||
846 | string_input_visitor_cleanup(mi); | |
847 | } | |
848 | ||
849 | char *object_property_print(Object *obj, const char *name, | |
850 | Error **errp) | |
851 | { | |
852 | StringOutputVisitor *mo; | |
853 | char *string; | |
854 | ||
855 | mo = string_output_visitor_new(); | |
8185bfc1 | 856 | object_property_get(obj, string_output_get_visitor(mo), name, errp); |
b2cd7dee PB |
857 | string = string_output_get_string(mo); |
858 | string_output_visitor_cleanup(mo); | |
859 | return string; | |
7b7b7d18 PB |
860 | } |
861 | ||
57c9fafe AL |
862 | const char *object_property_get_type(Object *obj, const char *name, Error **errp) |
863 | { | |
864 | ObjectProperty *prop = object_property_find(obj, name); | |
865 | ||
866 | if (prop == NULL) { | |
867 | error_set(errp, QERR_PROPERTY_NOT_FOUND, "", name); | |
868 | return NULL; | |
869 | } | |
870 | ||
871 | return prop->type; | |
872 | } | |
873 | ||
874 | Object *object_get_root(void) | |
875 | { | |
8b45d447 | 876 | static Object *root; |
57c9fafe | 877 | |
8b45d447 AL |
878 | if (!root) { |
879 | root = object_new("container"); | |
57c9fafe AL |
880 | } |
881 | ||
8b45d447 | 882 | return root; |
57c9fafe AL |
883 | } |
884 | ||
885 | static void object_get_child_property(Object *obj, Visitor *v, void *opaque, | |
886 | const char *name, Error **errp) | |
887 | { | |
888 | Object *child = opaque; | |
889 | gchar *path; | |
890 | ||
891 | path = object_get_canonical_path(child); | |
892 | visit_type_str(v, &path, name, errp); | |
893 | g_free(path); | |
894 | } | |
895 | ||
db85b575 AL |
896 | static void object_finalize_child_property(Object *obj, const char *name, |
897 | void *opaque) | |
898 | { | |
899 | Object *child = opaque; | |
900 | ||
901 | object_unref(child); | |
902 | } | |
903 | ||
57c9fafe AL |
904 | void object_property_add_child(Object *obj, const char *name, |
905 | Object *child, Error **errp) | |
906 | { | |
907 | gchar *type; | |
908 | ||
a1e7efdc PB |
909 | /* Registering an interface object in the composition tree will mightily |
910 | * confuse object_get_canonical_path (which, on the other hand, knows how | |
911 | * to get the canonical path of an interface object). | |
912 | */ | |
913 | assert(!object_is_type(obj, type_interface)); | |
914 | ||
57c9fafe AL |
915 | type = g_strdup_printf("child<%s>", object_get_typename(OBJECT(child))); |
916 | ||
917 | object_property_add(obj, name, type, object_get_child_property, | |
db85b575 | 918 | NULL, object_finalize_child_property, child, errp); |
57c9fafe AL |
919 | |
920 | object_ref(child); | |
921 | g_assert(child->parent == NULL); | |
922 | child->parent = obj; | |
923 | ||
924 | g_free(type); | |
925 | } | |
926 | ||
927 | static void object_get_link_property(Object *obj, Visitor *v, void *opaque, | |
928 | const char *name, Error **errp) | |
929 | { | |
930 | Object **child = opaque; | |
931 | gchar *path; | |
932 | ||
933 | if (*child) { | |
934 | path = object_get_canonical_path(*child); | |
935 | visit_type_str(v, &path, name, errp); | |
936 | g_free(path); | |
937 | } else { | |
938 | path = (gchar *)""; | |
939 | visit_type_str(v, &path, name, errp); | |
940 | } | |
941 | } | |
942 | ||
943 | static void object_set_link_property(Object *obj, Visitor *v, void *opaque, | |
944 | const char *name, Error **errp) | |
945 | { | |
946 | Object **child = opaque; | |
f0cdc966 | 947 | Object *old_target; |
57c9fafe AL |
948 | bool ambiguous = false; |
949 | const char *type; | |
950 | char *path; | |
11e35bfd | 951 | gchar *target_type; |
57c9fafe AL |
952 | |
953 | type = object_property_get_type(obj, name, NULL); | |
954 | ||
955 | visit_type_str(v, &path, name, errp); | |
956 | ||
f0cdc966 AB |
957 | old_target = *child; |
958 | *child = NULL; | |
57c9fafe AL |
959 | |
960 | if (strcmp(path, "") != 0) { | |
961 | Object *target; | |
962 | ||
11e35bfd PB |
963 | /* Go from link<FOO> to FOO. */ |
964 | target_type = g_strndup(&type[5], strlen(type) - 6); | |
965 | target = object_resolve_path_type(path, target_type, &ambiguous); | |
57c9fafe | 966 | |
11e35bfd PB |
967 | if (ambiguous) { |
968 | error_set(errp, QERR_AMBIGUOUS_PATH, path); | |
969 | } else if (target) { | |
970 | object_ref(target); | |
971 | *child = target; | |
57c9fafe | 972 | } else { |
11e35bfd PB |
973 | target = object_resolve_path(path, &ambiguous); |
974 | if (target || ambiguous) { | |
975 | error_set(errp, QERR_INVALID_PARAMETER_TYPE, name, target_type); | |
976 | } else { | |
977 | error_set(errp, QERR_DEVICE_NOT_FOUND, path); | |
978 | } | |
57c9fafe | 979 | } |
11e35bfd | 980 | g_free(target_type); |
57c9fafe AL |
981 | } |
982 | ||
983 | g_free(path); | |
f0cdc966 AB |
984 | |
985 | if (old_target != NULL) { | |
986 | object_unref(old_target); | |
987 | } | |
57c9fafe AL |
988 | } |
989 | ||
990 | void object_property_add_link(Object *obj, const char *name, | |
991 | const char *type, Object **child, | |
992 | Error **errp) | |
993 | { | |
994 | gchar *full_type; | |
995 | ||
996 | full_type = g_strdup_printf("link<%s>", type); | |
997 | ||
998 | object_property_add(obj, name, full_type, | |
999 | object_get_link_property, | |
1000 | object_set_link_property, | |
1001 | NULL, child, errp); | |
1002 | ||
1003 | g_free(full_type); | |
1004 | } | |
1005 | ||
1006 | gchar *object_get_canonical_path(Object *obj) | |
1007 | { | |
1008 | Object *root = object_get_root(); | |
1009 | char *newpath = NULL, *path = NULL; | |
1010 | ||
a1e7efdc PB |
1011 | if (object_is_type(obj, type_interface)) { |
1012 | obj = INTERFACE(obj)->obj; | |
1013 | } | |
1014 | ||
57c9fafe AL |
1015 | while (obj != root) { |
1016 | ObjectProperty *prop = NULL; | |
1017 | ||
1018 | g_assert(obj->parent != NULL); | |
1019 | ||
1020 | QTAILQ_FOREACH(prop, &obj->parent->properties, node) { | |
5d9d3f47 | 1021 | if (!object_property_is_child(prop)) { |
57c9fafe AL |
1022 | continue; |
1023 | } | |
1024 | ||
1025 | if (prop->opaque == obj) { | |
1026 | if (path) { | |
1027 | newpath = g_strdup_printf("%s/%s", prop->name, path); | |
1028 | g_free(path); | |
1029 | path = newpath; | |
1030 | } else { | |
1031 | path = g_strdup(prop->name); | |
1032 | } | |
1033 | break; | |
1034 | } | |
1035 | } | |
1036 | ||
1037 | g_assert(prop != NULL); | |
1038 | ||
1039 | obj = obj->parent; | |
1040 | } | |
1041 | ||
1042 | newpath = g_strdup_printf("/%s", path); | |
1043 | g_free(path); | |
1044 | ||
1045 | return newpath; | |
1046 | } | |
1047 | ||
a612b2a6 PB |
1048 | Object *object_resolve_path_component(Object *parent, gchar *part) |
1049 | { | |
1050 | ObjectProperty *prop = object_property_find(parent, part); | |
1051 | if (prop == NULL) { | |
1052 | return NULL; | |
1053 | } | |
1054 | ||
5d9d3f47 | 1055 | if (object_property_is_link(prop)) { |
a612b2a6 | 1056 | return *(Object **)prop->opaque; |
5d9d3f47 | 1057 | } else if (object_property_is_child(prop)) { |
a612b2a6 PB |
1058 | return prop->opaque; |
1059 | } else { | |
1060 | return NULL; | |
1061 | } | |
1062 | } | |
1063 | ||
57c9fafe AL |
1064 | static Object *object_resolve_abs_path(Object *parent, |
1065 | gchar **parts, | |
02fe2db6 | 1066 | const char *typename, |
57c9fafe AL |
1067 | int index) |
1068 | { | |
57c9fafe AL |
1069 | Object *child; |
1070 | ||
1071 | if (parts[index] == NULL) { | |
02fe2db6 | 1072 | return object_dynamic_cast(parent, typename); |
57c9fafe AL |
1073 | } |
1074 | ||
1075 | if (strcmp(parts[index], "") == 0) { | |
02fe2db6 | 1076 | return object_resolve_abs_path(parent, parts, typename, index + 1); |
57c9fafe AL |
1077 | } |
1078 | ||
a612b2a6 | 1079 | child = object_resolve_path_component(parent, parts[index]); |
57c9fafe AL |
1080 | if (!child) { |
1081 | return NULL; | |
1082 | } | |
1083 | ||
02fe2db6 | 1084 | return object_resolve_abs_path(child, parts, typename, index + 1); |
57c9fafe AL |
1085 | } |
1086 | ||
1087 | static Object *object_resolve_partial_path(Object *parent, | |
1088 | gchar **parts, | |
02fe2db6 | 1089 | const char *typename, |
57c9fafe AL |
1090 | bool *ambiguous) |
1091 | { | |
1092 | Object *obj; | |
1093 | ObjectProperty *prop; | |
1094 | ||
02fe2db6 | 1095 | obj = object_resolve_abs_path(parent, parts, typename, 0); |
57c9fafe AL |
1096 | |
1097 | QTAILQ_FOREACH(prop, &parent->properties, node) { | |
1098 | Object *found; | |
1099 | ||
5d9d3f47 | 1100 | if (!object_property_is_child(prop)) { |
57c9fafe AL |
1101 | continue; |
1102 | } | |
1103 | ||
02fe2db6 PB |
1104 | found = object_resolve_partial_path(prop->opaque, parts, |
1105 | typename, ambiguous); | |
57c9fafe AL |
1106 | if (found) { |
1107 | if (obj) { | |
1108 | if (ambiguous) { | |
1109 | *ambiguous = true; | |
1110 | } | |
1111 | return NULL; | |
1112 | } | |
1113 | obj = found; | |
1114 | } | |
1115 | ||
1116 | if (ambiguous && *ambiguous) { | |
1117 | return NULL; | |
1118 | } | |
1119 | } | |
1120 | ||
1121 | return obj; | |
1122 | } | |
1123 | ||
02fe2db6 PB |
1124 | Object *object_resolve_path_type(const char *path, const char *typename, |
1125 | bool *ambiguous) | |
57c9fafe AL |
1126 | { |
1127 | bool partial_path = true; | |
1128 | Object *obj; | |
1129 | gchar **parts; | |
1130 | ||
1131 | parts = g_strsplit(path, "/", 0); | |
1132 | if (parts == NULL || parts[0] == NULL) { | |
1133 | g_strfreev(parts); | |
1134 | return object_get_root(); | |
1135 | } | |
1136 | ||
1137 | if (strcmp(parts[0], "") == 0) { | |
1138 | partial_path = false; | |
1139 | } | |
1140 | ||
1141 | if (partial_path) { | |
1142 | if (ambiguous) { | |
1143 | *ambiguous = false; | |
1144 | } | |
02fe2db6 PB |
1145 | obj = object_resolve_partial_path(object_get_root(), parts, |
1146 | typename, ambiguous); | |
57c9fafe | 1147 | } else { |
02fe2db6 | 1148 | obj = object_resolve_abs_path(object_get_root(), parts, typename, 1); |
57c9fafe AL |
1149 | } |
1150 | ||
1151 | g_strfreev(parts); | |
1152 | ||
1153 | return obj; | |
1154 | } | |
1155 | ||
02fe2db6 PB |
1156 | Object *object_resolve_path(const char *path, bool *ambiguous) |
1157 | { | |
1158 | return object_resolve_path_type(path, TYPE_OBJECT, ambiguous); | |
1159 | } | |
1160 | ||
57c9fafe AL |
1161 | typedef struct StringProperty |
1162 | { | |
1163 | char *(*get)(Object *, Error **); | |
1164 | void (*set)(Object *, const char *, Error **); | |
1165 | } StringProperty; | |
1166 | ||
7b7b7d18 PB |
1167 | static void property_get_str(Object *obj, Visitor *v, void *opaque, |
1168 | const char *name, Error **errp) | |
57c9fafe AL |
1169 | { |
1170 | StringProperty *prop = opaque; | |
1171 | char *value; | |
1172 | ||
1173 | value = prop->get(obj, errp); | |
1174 | if (value) { | |
1175 | visit_type_str(v, &value, name, errp); | |
1176 | g_free(value); | |
1177 | } | |
1178 | } | |
1179 | ||
7b7b7d18 PB |
1180 | static void property_set_str(Object *obj, Visitor *v, void *opaque, |
1181 | const char *name, Error **errp) | |
57c9fafe AL |
1182 | { |
1183 | StringProperty *prop = opaque; | |
1184 | char *value; | |
1185 | Error *local_err = NULL; | |
1186 | ||
1187 | visit_type_str(v, &value, name, &local_err); | |
1188 | if (local_err) { | |
1189 | error_propagate(errp, local_err); | |
1190 | return; | |
1191 | } | |
1192 | ||
1193 | prop->set(obj, value, errp); | |
1194 | g_free(value); | |
1195 | } | |
1196 | ||
7b7b7d18 PB |
1197 | static void property_release_str(Object *obj, const char *name, |
1198 | void *opaque) | |
57c9fafe AL |
1199 | { |
1200 | StringProperty *prop = opaque; | |
1201 | g_free(prop); | |
1202 | } | |
1203 | ||
1204 | void object_property_add_str(Object *obj, const char *name, | |
1205 | char *(*get)(Object *, Error **), | |
1206 | void (*set)(Object *, const char *, Error **), | |
1207 | Error **errp) | |
1208 | { | |
1209 | StringProperty *prop = g_malloc0(sizeof(*prop)); | |
1210 | ||
1211 | prop->get = get; | |
1212 | prop->set = set; | |
1213 | ||
1214 | object_property_add(obj, name, "string", | |
7b7b7d18 PB |
1215 | get ? property_get_str : NULL, |
1216 | set ? property_set_str : NULL, | |
1217 | property_release_str, | |
57c9fafe AL |
1218 | prop, errp); |
1219 | } |