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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); | |
3b50e311 | 48 | void (*class_base_init)(ObjectClass *klass, void *data); |
2f28d2ff AL |
49 | void (*class_finalize)(ObjectClass *klass, void *data); |
50 | ||
51 | void *class_data; | |
52 | ||
53 | void (*instance_init)(Object *obj); | |
54 | void (*instance_finalize)(Object *obj); | |
55 | ||
56 | bool abstract; | |
57 | ||
58 | const char *parent; | |
59 | TypeImpl *parent_type; | |
60 | ||
61 | ObjectClass *class; | |
62 | ||
63 | int num_interfaces; | |
64 | InterfaceImpl interfaces[MAX_INTERFACES]; | |
65 | }; | |
66 | ||
67 | typedef struct Interface | |
68 | { | |
69 | Object parent; | |
70 | Object *obj; | |
71 | } Interface; | |
72 | ||
73 | #define INTERFACE(obj) OBJECT_CHECK(Interface, obj, TYPE_INTERFACE) | |
74 | ||
9970bd88 PB |
75 | static Type type_interface; |
76 | ||
2f28d2ff AL |
77 | static GHashTable *type_table_get(void) |
78 | { | |
79 | static GHashTable *type_table; | |
80 | ||
81 | if (type_table == NULL) { | |
82 | type_table = g_hash_table_new(g_str_hash, g_str_equal); | |
83 | } | |
84 | ||
85 | return type_table; | |
86 | } | |
87 | ||
88 | static void type_table_add(TypeImpl *ti) | |
89 | { | |
90 | g_hash_table_insert(type_table_get(), (void *)ti->name, ti); | |
91 | } | |
92 | ||
93 | static TypeImpl *type_table_lookup(const char *name) | |
94 | { | |
95 | return g_hash_table_lookup(type_table_get(), name); | |
96 | } | |
97 | ||
98 | TypeImpl *type_register(const TypeInfo *info) | |
99 | { | |
100 | TypeImpl *ti = g_malloc0(sizeof(*ti)); | |
101 | ||
102 | g_assert(info->name != NULL); | |
103 | ||
73093354 AL |
104 | if (type_table_lookup(info->name) != NULL) { |
105 | fprintf(stderr, "Registering `%s' which already exists\n", info->name); | |
106 | abort(); | |
107 | } | |
108 | ||
2f28d2ff AL |
109 | ti->name = g_strdup(info->name); |
110 | ti->parent = g_strdup(info->parent); | |
111 | ||
112 | ti->class_size = info->class_size; | |
113 | ti->instance_size = info->instance_size; | |
114 | ||
115 | ti->class_init = info->class_init; | |
3b50e311 | 116 | ti->class_base_init = info->class_base_init; |
2f28d2ff AL |
117 | ti->class_finalize = info->class_finalize; |
118 | ti->class_data = info->class_data; | |
119 | ||
120 | ti->instance_init = info->instance_init; | |
121 | ti->instance_finalize = info->instance_finalize; | |
122 | ||
123 | ti->abstract = info->abstract; | |
124 | ||
125 | if (info->interfaces) { | |
126 | int i; | |
127 | ||
128 | for (i = 0; info->interfaces[i].type; i++) { | |
129 | ti->interfaces[i].parent = info->interfaces[i].type; | |
130 | ti->interfaces[i].interface_initfn = info->interfaces[i].interface_initfn; | |
131 | ti->num_interfaces++; | |
132 | } | |
133 | } | |
134 | ||
135 | type_table_add(ti); | |
136 | ||
137 | return ti; | |
138 | } | |
139 | ||
140 | TypeImpl *type_register_static(const TypeInfo *info) | |
141 | { | |
142 | return type_register(info); | |
143 | } | |
144 | ||
145 | static TypeImpl *type_get_by_name(const char *name) | |
146 | { | |
147 | if (name == NULL) { | |
148 | return NULL; | |
149 | } | |
150 | ||
151 | return type_table_lookup(name); | |
152 | } | |
153 | ||
154 | static TypeImpl *type_get_parent(TypeImpl *type) | |
155 | { | |
156 | if (!type->parent_type && type->parent) { | |
157 | type->parent_type = type_get_by_name(type->parent); | |
158 | g_assert(type->parent_type != NULL); | |
159 | } | |
160 | ||
161 | return type->parent_type; | |
162 | } | |
163 | ||
164 | static bool type_has_parent(TypeImpl *type) | |
165 | { | |
166 | return (type->parent != NULL); | |
167 | } | |
168 | ||
169 | static size_t type_class_get_size(TypeImpl *ti) | |
170 | { | |
171 | if (ti->class_size) { | |
172 | return ti->class_size; | |
173 | } | |
174 | ||
175 | if (type_has_parent(ti)) { | |
176 | return type_class_get_size(type_get_parent(ti)); | |
177 | } | |
178 | ||
179 | return sizeof(ObjectClass); | |
180 | } | |
181 | ||
aca59af6 IM |
182 | static size_t type_object_get_size(TypeImpl *ti) |
183 | { | |
184 | if (ti->instance_size) { | |
185 | return ti->instance_size; | |
186 | } | |
187 | ||
188 | if (type_has_parent(ti)) { | |
189 | return type_object_get_size(type_get_parent(ti)); | |
190 | } | |
191 | ||
192 | return 0; | |
193 | } | |
194 | ||
2f28d2ff AL |
195 | static void type_class_interface_init(TypeImpl *ti, InterfaceImpl *iface) |
196 | { | |
197 | TypeInfo info = { | |
198 | .instance_size = sizeof(Interface), | |
199 | .parent = iface->parent, | |
200 | .class_size = sizeof(InterfaceClass), | |
201 | .class_init = iface->interface_initfn, | |
202 | .abstract = true, | |
203 | }; | |
204 | char *name = g_strdup_printf("<%s::%s>", ti->name, iface->parent); | |
205 | ||
206 | info.name = name; | |
207 | iface->type = type_register(&info); | |
208 | g_free(name); | |
209 | } | |
210 | ||
ac451033 | 211 | static void type_initialize(TypeImpl *ti) |
2f28d2ff | 212 | { |
745549c8 | 213 | TypeImpl *parent; |
2f28d2ff AL |
214 | int i; |
215 | ||
216 | if (ti->class) { | |
217 | return; | |
218 | } | |
219 | ||
220 | ti->class_size = type_class_get_size(ti); | |
aca59af6 | 221 | ti->instance_size = type_object_get_size(ti); |
2f28d2ff AL |
222 | |
223 | ti->class = g_malloc0(ti->class_size); | |
2f28d2ff | 224 | |
745549c8 PB |
225 | parent = type_get_parent(ti); |
226 | if (parent) { | |
ac451033 | 227 | type_initialize(parent); |
2f28d2ff | 228 | |
2f28d2ff | 229 | g_assert(parent->class_size <= ti->class_size); |
745549c8 PB |
230 | memcpy(ti->class, parent->class, parent->class_size); |
231 | } | |
2f28d2ff | 232 | |
745549c8 | 233 | ti->class->type = ti; |
3b50e311 | 234 | |
745549c8 PB |
235 | while (parent) { |
236 | if (parent->class_base_init) { | |
237 | parent->class_base_init(ti->class, ti->class_data); | |
3b50e311 | 238 | } |
745549c8 | 239 | parent = type_get_parent(parent); |
2f28d2ff AL |
240 | } |
241 | ||
2f28d2ff AL |
242 | for (i = 0; i < ti->num_interfaces; i++) { |
243 | type_class_interface_init(ti, &ti->interfaces[i]); | |
244 | } | |
245 | ||
246 | if (ti->class_init) { | |
247 | ti->class_init(ti->class, ti->class_data); | |
248 | } | |
249 | } | |
250 | ||
251 | static void object_interface_init(Object *obj, InterfaceImpl *iface) | |
252 | { | |
253 | TypeImpl *ti = iface->type; | |
254 | Interface *iface_obj; | |
255 | ||
256 | iface_obj = INTERFACE(object_new(ti->name)); | |
257 | iface_obj->obj = obj; | |
258 | ||
259 | obj->interfaces = g_slist_prepend(obj->interfaces, iface_obj); | |
260 | } | |
261 | ||
262 | static void object_init_with_type(Object *obj, TypeImpl *ti) | |
263 | { | |
264 | int i; | |
265 | ||
266 | if (type_has_parent(ti)) { | |
267 | object_init_with_type(obj, type_get_parent(ti)); | |
268 | } | |
269 | ||
270 | for (i = 0; i < ti->num_interfaces; i++) { | |
271 | object_interface_init(obj, &ti->interfaces[i]); | |
272 | } | |
273 | ||
274 | if (ti->instance_init) { | |
275 | ti->instance_init(obj); | |
276 | } | |
277 | } | |
278 | ||
279 | void object_initialize_with_type(void *data, TypeImpl *type) | |
280 | { | |
281 | Object *obj = data; | |
282 | ||
283 | g_assert(type != NULL); | |
ac451033 | 284 | type_initialize(type); |
aca59af6 IM |
285 | |
286 | g_assert(type->instance_size >= sizeof(Object)); | |
2f28d2ff AL |
287 | g_assert(type->abstract == false); |
288 | ||
289 | memset(obj, 0, type->instance_size); | |
290 | obj->class = type->class; | |
57c9fafe | 291 | QTAILQ_INIT(&obj->properties); |
2f28d2ff AL |
292 | object_init_with_type(obj, type); |
293 | } | |
294 | ||
295 | void object_initialize(void *data, const char *typename) | |
296 | { | |
297 | TypeImpl *type = type_get_by_name(typename); | |
298 | ||
299 | object_initialize_with_type(data, type); | |
300 | } | |
301 | ||
5d9d3f47 AF |
302 | static inline bool object_property_is_child(ObjectProperty *prop) |
303 | { | |
304 | return strstart(prop->type, "child<", NULL); | |
305 | } | |
306 | ||
307 | static inline bool object_property_is_link(ObjectProperty *prop) | |
308 | { | |
309 | return strstart(prop->type, "link<", NULL); | |
310 | } | |
311 | ||
57c9fafe AL |
312 | static void object_property_del_all(Object *obj) |
313 | { | |
314 | while (!QTAILQ_EMPTY(&obj->properties)) { | |
315 | ObjectProperty *prop = QTAILQ_FIRST(&obj->properties); | |
316 | ||
317 | QTAILQ_REMOVE(&obj->properties, prop, node); | |
318 | ||
319 | if (prop->release) { | |
320 | prop->release(obj, prop->name, prop->opaque); | |
321 | } | |
322 | ||
323 | g_free(prop->name); | |
324 | g_free(prop->type); | |
325 | g_free(prop); | |
326 | } | |
327 | } | |
328 | ||
329 | static void object_property_del_child(Object *obj, Object *child, Error **errp) | |
330 | { | |
331 | ObjectProperty *prop; | |
332 | ||
333 | QTAILQ_FOREACH(prop, &obj->properties, node) { | |
5d9d3f47 | 334 | if (object_property_is_child(prop) && prop->opaque == child) { |
57c9fafe | 335 | object_property_del(obj, prop->name, errp); |
6c1fdcf9 | 336 | break; |
57c9fafe AL |
337 | } |
338 | } | |
339 | } | |
340 | ||
341 | void object_unparent(Object *obj) | |
342 | { | |
343 | if (obj->parent) { | |
344 | object_property_del_child(obj->parent, obj, NULL); | |
345 | } | |
346 | } | |
347 | ||
2f28d2ff AL |
348 | static void object_deinit(Object *obj, TypeImpl *type) |
349 | { | |
350 | if (type->instance_finalize) { | |
351 | type->instance_finalize(obj); | |
352 | } | |
353 | ||
354 | while (obj->interfaces) { | |
355 | Interface *iface_obj = obj->interfaces->data; | |
356 | obj->interfaces = g_slist_delete_link(obj->interfaces, obj->interfaces); | |
357 | object_delete(OBJECT(iface_obj)); | |
358 | } | |
359 | ||
360 | if (type_has_parent(type)) { | |
361 | object_deinit(obj, type_get_parent(type)); | |
362 | } | |
57c9fafe AL |
363 | |
364 | object_unparent(obj); | |
2f28d2ff AL |
365 | } |
366 | ||
367 | void object_finalize(void *data) | |
368 | { | |
369 | Object *obj = data; | |
370 | TypeImpl *ti = obj->class->type; | |
371 | ||
372 | object_deinit(obj, ti); | |
57c9fafe | 373 | object_property_del_all(obj); |
db85b575 AL |
374 | |
375 | g_assert(obj->ref == 0); | |
2f28d2ff AL |
376 | } |
377 | ||
378 | Object *object_new_with_type(Type type) | |
379 | { | |
380 | Object *obj; | |
381 | ||
382 | g_assert(type != NULL); | |
ac451033 | 383 | type_initialize(type); |
2f28d2ff AL |
384 | |
385 | obj = g_malloc(type->instance_size); | |
386 | object_initialize_with_type(obj, type); | |
db85b575 | 387 | object_ref(obj); |
2f28d2ff AL |
388 | |
389 | return obj; | |
390 | } | |
391 | ||
392 | Object *object_new(const char *typename) | |
393 | { | |
394 | TypeImpl *ti = type_get_by_name(typename); | |
395 | ||
396 | return object_new_with_type(ti); | |
397 | } | |
398 | ||
399 | void object_delete(Object *obj) | |
400 | { | |
db85b575 AL |
401 | object_unref(obj); |
402 | g_assert(obj->ref == 0); | |
2f28d2ff AL |
403 | g_free(obj); |
404 | } | |
405 | ||
acc4af3f | 406 | static bool type_is_ancestor(TypeImpl *type, TypeImpl *target_type) |
2f28d2ff | 407 | { |
acc4af3f | 408 | assert(target_type); |
2f28d2ff AL |
409 | |
410 | /* Check if typename is a direct ancestor of type */ | |
411 | while (type) { | |
412 | if (type == target_type) { | |
413 | return true; | |
414 | } | |
415 | ||
416 | type = type_get_parent(type); | |
417 | } | |
418 | ||
acc4af3f PB |
419 | return false; |
420 | } | |
2f28d2ff | 421 | |
9970bd88 | 422 | static bool object_is_type(Object *obj, TypeImpl *target_type) |
acc4af3f | 423 | { |
9970bd88 | 424 | return !target_type || type_is_ancestor(obj->class->type, target_type); |
2f28d2ff AL |
425 | } |
426 | ||
427 | Object *object_dynamic_cast(Object *obj, const char *typename) | |
428 | { | |
9970bd88 | 429 | TypeImpl *target_type = type_get_by_name(typename); |
2f28d2ff AL |
430 | GSList *i; |
431 | ||
acc4af3f PB |
432 | /* Check if typename is a direct ancestor. Special-case TYPE_OBJECT, |
433 | * we want to go back from interfaces to the parent. | |
434 | */ | |
9970bd88 | 435 | if (target_type && object_is_type(obj, target_type)) { |
acc4af3f PB |
436 | return obj; |
437 | } | |
438 | ||
439 | /* Check if obj is an interface and its containing object is a direct | |
440 | * ancestor of typename. In principle we could do this test at the very | |
441 | * beginning of object_dynamic_cast, avoiding a second call to | |
442 | * object_is_type. However, casting between interfaces is relatively | |
9970bd88 | 443 | * rare, and object_is_type(obj, type_interface) would fail almost always. |
acc4af3f PB |
444 | * |
445 | * Perhaps we could add a magic value to the object header for increased | |
446 | * (run-time) type safety and to speed up tests like this one. If we ever | |
447 | * do that we can revisit the order here. | |
448 | */ | |
9970bd88 | 449 | if (object_is_type(obj, type_interface)) { |
acc4af3f PB |
450 | assert(!obj->interfaces); |
451 | obj = INTERFACE(obj)->obj; | |
9970bd88 | 452 | if (object_is_type(obj, target_type)) { |
acc4af3f PB |
453 | return obj; |
454 | } | |
455 | } | |
456 | ||
9970bd88 | 457 | if (!target_type) { |
2f28d2ff AL |
458 | return obj; |
459 | } | |
460 | ||
461 | /* Check if obj has an interface of typename */ | |
462 | for (i = obj->interfaces; i; i = i->next) { | |
463 | Interface *iface = i->data; | |
464 | ||
9970bd88 | 465 | if (object_is_type(OBJECT(iface), target_type)) { |
2f28d2ff AL |
466 | return OBJECT(iface); |
467 | } | |
468 | } | |
469 | ||
2f28d2ff AL |
470 | return NULL; |
471 | } | |
472 | ||
473 | ||
2f28d2ff AL |
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 | ||
ac451033 | 543 | type_initialize(type); |
2f28d2ff AL |
544 | |
545 | return type->class; | |
546 | } | |
547 | ||
e7cce67f PB |
548 | ObjectClass *object_class_get_parent(ObjectClass *class) |
549 | { | |
550 | TypeImpl *type = type_get_parent(class->type); | |
551 | ||
552 | if (!type) { | |
553 | return NULL; | |
554 | } | |
555 | ||
556 | type_initialize(type); | |
557 | ||
558 | return type->class; | |
559 | } | |
560 | ||
2f28d2ff AL |
561 | typedef struct OCFData |
562 | { | |
563 | void (*fn)(ObjectClass *klass, void *opaque); | |
93c511a1 AL |
564 | const char *implements_type; |
565 | bool include_abstract; | |
2f28d2ff AL |
566 | void *opaque; |
567 | } OCFData; | |
568 | ||
569 | static void object_class_foreach_tramp(gpointer key, gpointer value, | |
570 | gpointer opaque) | |
571 | { | |
572 | OCFData *data = opaque; | |
573 | TypeImpl *type = value; | |
93c511a1 | 574 | ObjectClass *k; |
2f28d2ff | 575 | |
ac451033 | 576 | type_initialize(type); |
93c511a1 | 577 | k = type->class; |
2f28d2ff | 578 | |
93c511a1 AL |
579 | if (!data->include_abstract && type->abstract) { |
580 | return; | |
581 | } | |
582 | ||
583 | if (data->implements_type && | |
584 | !object_class_dynamic_cast(k, data->implements_type)) { | |
585 | return; | |
586 | } | |
587 | ||
588 | data->fn(k, data->opaque); | |
2f28d2ff AL |
589 | } |
590 | ||
591 | void object_class_foreach(void (*fn)(ObjectClass *klass, void *opaque), | |
93c511a1 | 592 | const char *implements_type, bool include_abstract, |
2f28d2ff AL |
593 | void *opaque) |
594 | { | |
93c511a1 | 595 | OCFData data = { fn, implements_type, include_abstract, opaque }; |
2f28d2ff AL |
596 | |
597 | g_hash_table_foreach(type_table_get(), object_class_foreach_tramp, &data); | |
598 | } | |
57c9fafe | 599 | |
32efc535 PB |
600 | int object_child_foreach(Object *obj, int (*fn)(Object *child, void *opaque), |
601 | void *opaque) | |
602 | { | |
603 | ObjectProperty *prop; | |
604 | int ret = 0; | |
605 | ||
606 | QTAILQ_FOREACH(prop, &obj->properties, node) { | |
607 | if (object_property_is_child(prop)) { | |
608 | ret = fn(prop->opaque, opaque); | |
609 | if (ret != 0) { | |
610 | break; | |
611 | } | |
612 | } | |
613 | } | |
614 | return ret; | |
615 | } | |
616 | ||
418ba9e5 AF |
617 | static void object_class_get_list_tramp(ObjectClass *klass, void *opaque) |
618 | { | |
619 | GSList **list = opaque; | |
620 | ||
621 | *list = g_slist_prepend(*list, klass); | |
622 | } | |
623 | ||
624 | GSList *object_class_get_list(const char *implements_type, | |
625 | bool include_abstract) | |
626 | { | |
627 | GSList *list = NULL; | |
628 | ||
629 | object_class_foreach(object_class_get_list_tramp, | |
630 | implements_type, include_abstract, &list); | |
631 | return list; | |
632 | } | |
633 | ||
57c9fafe AL |
634 | void object_ref(Object *obj) |
635 | { | |
636 | obj->ref++; | |
637 | } | |
638 | ||
639 | void object_unref(Object *obj) | |
640 | { | |
641 | g_assert(obj->ref > 0); | |
642 | obj->ref--; | |
643 | ||
644 | /* parent always holds a reference to its children */ | |
645 | if (obj->ref == 0) { | |
646 | object_finalize(obj); | |
647 | } | |
648 | } | |
649 | ||
650 | void object_property_add(Object *obj, const char *name, const char *type, | |
651 | ObjectPropertyAccessor *get, | |
652 | ObjectPropertyAccessor *set, | |
653 | ObjectPropertyRelease *release, | |
654 | void *opaque, Error **errp) | |
655 | { | |
656 | ObjectProperty *prop = g_malloc0(sizeof(*prop)); | |
657 | ||
658 | prop->name = g_strdup(name); | |
659 | prop->type = g_strdup(type); | |
660 | ||
661 | prop->get = get; | |
662 | prop->set = set; | |
663 | prop->release = release; | |
664 | prop->opaque = opaque; | |
665 | ||
666 | QTAILQ_INSERT_TAIL(&obj->properties, prop, node); | |
667 | } | |
668 | ||
669 | static ObjectProperty *object_property_find(Object *obj, const char *name) | |
670 | { | |
671 | ObjectProperty *prop; | |
672 | ||
673 | QTAILQ_FOREACH(prop, &obj->properties, node) { | |
674 | if (strcmp(prop->name, name) == 0) { | |
675 | return prop; | |
676 | } | |
677 | } | |
678 | ||
679 | return NULL; | |
680 | } | |
681 | ||
682 | void object_property_del(Object *obj, const char *name, Error **errp) | |
683 | { | |
684 | ObjectProperty *prop = object_property_find(obj, name); | |
685 | ||
686 | QTAILQ_REMOVE(&obj->properties, prop, node); | |
687 | ||
688 | prop->release(obj, prop->name, prop->opaque); | |
689 | ||
690 | g_free(prop->name); | |
691 | g_free(prop->type); | |
692 | g_free(prop); | |
693 | } | |
694 | ||
695 | void object_property_get(Object *obj, Visitor *v, const char *name, | |
696 | Error **errp) | |
697 | { | |
698 | ObjectProperty *prop = object_property_find(obj, name); | |
699 | ||
700 | if (prop == NULL) { | |
701 | error_set(errp, QERR_PROPERTY_NOT_FOUND, "", name); | |
702 | return; | |
703 | } | |
704 | ||
705 | if (!prop->get) { | |
706 | error_set(errp, QERR_PERMISSION_DENIED); | |
707 | } else { | |
708 | prop->get(obj, v, prop->opaque, name, errp); | |
709 | } | |
710 | } | |
711 | ||
712 | void object_property_set(Object *obj, Visitor *v, const char *name, | |
713 | Error **errp) | |
714 | { | |
715 | ObjectProperty *prop = object_property_find(obj, name); | |
716 | ||
717 | if (prop == NULL) { | |
718 | error_set(errp, QERR_PROPERTY_NOT_FOUND, "", name); | |
719 | return; | |
720 | } | |
721 | ||
722 | if (!prop->set) { | |
723 | error_set(errp, QERR_PERMISSION_DENIED); | |
724 | } else { | |
725 | prop->set(obj, v, prop->opaque, name, errp); | |
726 | } | |
727 | } | |
728 | ||
7b7b7d18 PB |
729 | void object_property_set_str(Object *obj, const char *value, |
730 | const char *name, Error **errp) | |
731 | { | |
732 | QString *qstr = qstring_from_str(value); | |
733 | object_property_set_qobject(obj, QOBJECT(qstr), name, errp); | |
734 | ||
735 | QDECREF(qstr); | |
736 | } | |
737 | ||
738 | char *object_property_get_str(Object *obj, const char *name, | |
739 | Error **errp) | |
740 | { | |
741 | QObject *ret = object_property_get_qobject(obj, name, errp); | |
742 | QString *qstring; | |
743 | char *retval; | |
744 | ||
745 | if (!ret) { | |
746 | return NULL; | |
747 | } | |
748 | qstring = qobject_to_qstring(ret); | |
749 | if (!qstring) { | |
750 | error_set(errp, QERR_INVALID_PARAMETER_TYPE, name, "string"); | |
751 | retval = NULL; | |
752 | } else { | |
753 | retval = g_strdup(qstring_get_str(qstring)); | |
754 | } | |
755 | ||
756 | QDECREF(qstring); | |
757 | return retval; | |
758 | } | |
759 | ||
1d9c5a12 PB |
760 | void object_property_set_link(Object *obj, Object *value, |
761 | const char *name, Error **errp) | |
762 | { | |
763 | object_property_set_str(obj, object_get_canonical_path(value), | |
764 | name, errp); | |
765 | } | |
766 | ||
767 | Object *object_property_get_link(Object *obj, const char *name, | |
768 | Error **errp) | |
769 | { | |
770 | char *str = object_property_get_str(obj, name, errp); | |
771 | Object *target = NULL; | |
772 | ||
773 | if (str && *str) { | |
774 | target = object_resolve_path(str, NULL); | |
775 | if (!target) { | |
776 | error_set(errp, QERR_DEVICE_NOT_FOUND, str); | |
777 | } | |
778 | } | |
779 | ||
780 | g_free(str); | |
781 | return target; | |
782 | } | |
783 | ||
7b7b7d18 PB |
784 | void object_property_set_bool(Object *obj, bool value, |
785 | const char *name, Error **errp) | |
786 | { | |
787 | QBool *qbool = qbool_from_int(value); | |
788 | object_property_set_qobject(obj, QOBJECT(qbool), name, errp); | |
789 | ||
790 | QDECREF(qbool); | |
791 | } | |
792 | ||
793 | bool object_property_get_bool(Object *obj, const char *name, | |
794 | Error **errp) | |
795 | { | |
796 | QObject *ret = object_property_get_qobject(obj, name, errp); | |
797 | QBool *qbool; | |
798 | bool retval; | |
799 | ||
800 | if (!ret) { | |
801 | return false; | |
802 | } | |
803 | qbool = qobject_to_qbool(ret); | |
804 | if (!qbool) { | |
805 | error_set(errp, QERR_INVALID_PARAMETER_TYPE, name, "boolean"); | |
806 | retval = false; | |
807 | } else { | |
808 | retval = qbool_get_int(qbool); | |
809 | } | |
810 | ||
811 | QDECREF(qbool); | |
812 | return retval; | |
813 | } | |
814 | ||
815 | void object_property_set_int(Object *obj, int64_t value, | |
816 | const char *name, Error **errp) | |
817 | { | |
818 | QInt *qint = qint_from_int(value); | |
819 | object_property_set_qobject(obj, QOBJECT(qint), name, errp); | |
820 | ||
821 | QDECREF(qint); | |
822 | } | |
823 | ||
824 | int64_t object_property_get_int(Object *obj, const char *name, | |
825 | Error **errp) | |
826 | { | |
827 | QObject *ret = object_property_get_qobject(obj, name, errp); | |
828 | QInt *qint; | |
829 | int64_t retval; | |
830 | ||
831 | if (!ret) { | |
832 | return -1; | |
833 | } | |
834 | qint = qobject_to_qint(ret); | |
835 | if (!qint) { | |
836 | error_set(errp, QERR_INVALID_PARAMETER_TYPE, name, "int"); | |
837 | retval = -1; | |
838 | } else { | |
839 | retval = qint_get_int(qint); | |
840 | } | |
841 | ||
842 | QDECREF(qint); | |
843 | return retval; | |
b2cd7dee PB |
844 | } |
845 | ||
846 | void object_property_parse(Object *obj, const char *string, | |
847 | const char *name, Error **errp) | |
848 | { | |
849 | StringInputVisitor *mi; | |
850 | mi = string_input_visitor_new(string); | |
851 | object_property_set(obj, string_input_get_visitor(mi), name, errp); | |
852 | ||
853 | string_input_visitor_cleanup(mi); | |
854 | } | |
855 | ||
856 | char *object_property_print(Object *obj, const char *name, | |
857 | Error **errp) | |
858 | { | |
859 | StringOutputVisitor *mo; | |
860 | char *string; | |
861 | ||
862 | mo = string_output_visitor_new(); | |
8185bfc1 | 863 | object_property_get(obj, string_output_get_visitor(mo), name, errp); |
b2cd7dee PB |
864 | string = string_output_get_string(mo); |
865 | string_output_visitor_cleanup(mo); | |
866 | return string; | |
7b7b7d18 PB |
867 | } |
868 | ||
57c9fafe AL |
869 | const char *object_property_get_type(Object *obj, const char *name, Error **errp) |
870 | { | |
871 | ObjectProperty *prop = object_property_find(obj, name); | |
872 | ||
873 | if (prop == NULL) { | |
874 | error_set(errp, QERR_PROPERTY_NOT_FOUND, "", name); | |
875 | return NULL; | |
876 | } | |
877 | ||
878 | return prop->type; | |
879 | } | |
880 | ||
881 | Object *object_get_root(void) | |
882 | { | |
8b45d447 | 883 | static Object *root; |
57c9fafe | 884 | |
8b45d447 AL |
885 | if (!root) { |
886 | root = object_new("container"); | |
57c9fafe AL |
887 | } |
888 | ||
8b45d447 | 889 | return root; |
57c9fafe AL |
890 | } |
891 | ||
892 | static void object_get_child_property(Object *obj, Visitor *v, void *opaque, | |
893 | const char *name, Error **errp) | |
894 | { | |
895 | Object *child = opaque; | |
896 | gchar *path; | |
897 | ||
898 | path = object_get_canonical_path(child); | |
899 | visit_type_str(v, &path, name, errp); | |
900 | g_free(path); | |
901 | } | |
902 | ||
db85b575 AL |
903 | static void object_finalize_child_property(Object *obj, const char *name, |
904 | void *opaque) | |
905 | { | |
906 | Object *child = opaque; | |
907 | ||
908 | object_unref(child); | |
909 | } | |
910 | ||
57c9fafe AL |
911 | void object_property_add_child(Object *obj, const char *name, |
912 | Object *child, Error **errp) | |
913 | { | |
914 | gchar *type; | |
915 | ||
a1e7efdc PB |
916 | /* Registering an interface object in the composition tree will mightily |
917 | * confuse object_get_canonical_path (which, on the other hand, knows how | |
918 | * to get the canonical path of an interface object). | |
919 | */ | |
920 | assert(!object_is_type(obj, type_interface)); | |
921 | ||
57c9fafe AL |
922 | type = g_strdup_printf("child<%s>", object_get_typename(OBJECT(child))); |
923 | ||
924 | object_property_add(obj, name, type, object_get_child_property, | |
db85b575 | 925 | NULL, object_finalize_child_property, child, errp); |
57c9fafe AL |
926 | |
927 | object_ref(child); | |
928 | g_assert(child->parent == NULL); | |
929 | child->parent = obj; | |
930 | ||
931 | g_free(type); | |
932 | } | |
933 | ||
934 | static void object_get_link_property(Object *obj, Visitor *v, void *opaque, | |
935 | const char *name, Error **errp) | |
936 | { | |
937 | Object **child = opaque; | |
938 | gchar *path; | |
939 | ||
940 | if (*child) { | |
941 | path = object_get_canonical_path(*child); | |
942 | visit_type_str(v, &path, name, errp); | |
943 | g_free(path); | |
944 | } else { | |
945 | path = (gchar *)""; | |
946 | visit_type_str(v, &path, name, errp); | |
947 | } | |
948 | } | |
949 | ||
950 | static void object_set_link_property(Object *obj, Visitor *v, void *opaque, | |
951 | const char *name, Error **errp) | |
952 | { | |
953 | Object **child = opaque; | |
f0cdc966 | 954 | Object *old_target; |
57c9fafe AL |
955 | bool ambiguous = false; |
956 | const char *type; | |
957 | char *path; | |
11e35bfd | 958 | gchar *target_type; |
57c9fafe AL |
959 | |
960 | type = object_property_get_type(obj, name, NULL); | |
961 | ||
962 | visit_type_str(v, &path, name, errp); | |
963 | ||
f0cdc966 AB |
964 | old_target = *child; |
965 | *child = NULL; | |
57c9fafe AL |
966 | |
967 | if (strcmp(path, "") != 0) { | |
968 | Object *target; | |
969 | ||
11e35bfd PB |
970 | /* Go from link<FOO> to FOO. */ |
971 | target_type = g_strndup(&type[5], strlen(type) - 6); | |
972 | target = object_resolve_path_type(path, target_type, &ambiguous); | |
57c9fafe | 973 | |
11e35bfd PB |
974 | if (ambiguous) { |
975 | error_set(errp, QERR_AMBIGUOUS_PATH, path); | |
976 | } else if (target) { | |
977 | object_ref(target); | |
978 | *child = target; | |
57c9fafe | 979 | } else { |
11e35bfd PB |
980 | target = object_resolve_path(path, &ambiguous); |
981 | if (target || ambiguous) { | |
982 | error_set(errp, QERR_INVALID_PARAMETER_TYPE, name, target_type); | |
983 | } else { | |
984 | error_set(errp, QERR_DEVICE_NOT_FOUND, path); | |
985 | } | |
57c9fafe | 986 | } |
11e35bfd | 987 | g_free(target_type); |
57c9fafe AL |
988 | } |
989 | ||
990 | g_free(path); | |
f0cdc966 AB |
991 | |
992 | if (old_target != NULL) { | |
993 | object_unref(old_target); | |
994 | } | |
57c9fafe AL |
995 | } |
996 | ||
997 | void object_property_add_link(Object *obj, const char *name, | |
998 | const char *type, Object **child, | |
999 | Error **errp) | |
1000 | { | |
1001 | gchar *full_type; | |
1002 | ||
1003 | full_type = g_strdup_printf("link<%s>", type); | |
1004 | ||
1005 | object_property_add(obj, name, full_type, | |
1006 | object_get_link_property, | |
1007 | object_set_link_property, | |
1008 | NULL, child, errp); | |
1009 | ||
1010 | g_free(full_type); | |
1011 | } | |
1012 | ||
1013 | gchar *object_get_canonical_path(Object *obj) | |
1014 | { | |
1015 | Object *root = object_get_root(); | |
1016 | char *newpath = NULL, *path = NULL; | |
1017 | ||
a1e7efdc PB |
1018 | if (object_is_type(obj, type_interface)) { |
1019 | obj = INTERFACE(obj)->obj; | |
1020 | } | |
1021 | ||
57c9fafe AL |
1022 | while (obj != root) { |
1023 | ObjectProperty *prop = NULL; | |
1024 | ||
1025 | g_assert(obj->parent != NULL); | |
1026 | ||
1027 | QTAILQ_FOREACH(prop, &obj->parent->properties, node) { | |
5d9d3f47 | 1028 | if (!object_property_is_child(prop)) { |
57c9fafe AL |
1029 | continue; |
1030 | } | |
1031 | ||
1032 | if (prop->opaque == obj) { | |
1033 | if (path) { | |
1034 | newpath = g_strdup_printf("%s/%s", prop->name, path); | |
1035 | g_free(path); | |
1036 | path = newpath; | |
1037 | } else { | |
1038 | path = g_strdup(prop->name); | |
1039 | } | |
1040 | break; | |
1041 | } | |
1042 | } | |
1043 | ||
1044 | g_assert(prop != NULL); | |
1045 | ||
1046 | obj = obj->parent; | |
1047 | } | |
1048 | ||
1049 | newpath = g_strdup_printf("/%s", path); | |
1050 | g_free(path); | |
1051 | ||
1052 | return newpath; | |
1053 | } | |
1054 | ||
a612b2a6 PB |
1055 | Object *object_resolve_path_component(Object *parent, gchar *part) |
1056 | { | |
1057 | ObjectProperty *prop = object_property_find(parent, part); | |
1058 | if (prop == NULL) { | |
1059 | return NULL; | |
1060 | } | |
1061 | ||
5d9d3f47 | 1062 | if (object_property_is_link(prop)) { |
a612b2a6 | 1063 | return *(Object **)prop->opaque; |
5d9d3f47 | 1064 | } else if (object_property_is_child(prop)) { |
a612b2a6 PB |
1065 | return prop->opaque; |
1066 | } else { | |
1067 | return NULL; | |
1068 | } | |
1069 | } | |
1070 | ||
57c9fafe AL |
1071 | static Object *object_resolve_abs_path(Object *parent, |
1072 | gchar **parts, | |
02fe2db6 | 1073 | const char *typename, |
57c9fafe AL |
1074 | int index) |
1075 | { | |
57c9fafe AL |
1076 | Object *child; |
1077 | ||
1078 | if (parts[index] == NULL) { | |
02fe2db6 | 1079 | return object_dynamic_cast(parent, typename); |
57c9fafe AL |
1080 | } |
1081 | ||
1082 | if (strcmp(parts[index], "") == 0) { | |
02fe2db6 | 1083 | return object_resolve_abs_path(parent, parts, typename, index + 1); |
57c9fafe AL |
1084 | } |
1085 | ||
a612b2a6 | 1086 | child = object_resolve_path_component(parent, parts[index]); |
57c9fafe AL |
1087 | if (!child) { |
1088 | return NULL; | |
1089 | } | |
1090 | ||
02fe2db6 | 1091 | return object_resolve_abs_path(child, parts, typename, index + 1); |
57c9fafe AL |
1092 | } |
1093 | ||
1094 | static Object *object_resolve_partial_path(Object *parent, | |
1095 | gchar **parts, | |
02fe2db6 | 1096 | const char *typename, |
57c9fafe AL |
1097 | bool *ambiguous) |
1098 | { | |
1099 | Object *obj; | |
1100 | ObjectProperty *prop; | |
1101 | ||
02fe2db6 | 1102 | obj = object_resolve_abs_path(parent, parts, typename, 0); |
57c9fafe AL |
1103 | |
1104 | QTAILQ_FOREACH(prop, &parent->properties, node) { | |
1105 | Object *found; | |
1106 | ||
5d9d3f47 | 1107 | if (!object_property_is_child(prop)) { |
57c9fafe AL |
1108 | continue; |
1109 | } | |
1110 | ||
02fe2db6 PB |
1111 | found = object_resolve_partial_path(prop->opaque, parts, |
1112 | typename, ambiguous); | |
57c9fafe AL |
1113 | if (found) { |
1114 | if (obj) { | |
1115 | if (ambiguous) { | |
1116 | *ambiguous = true; | |
1117 | } | |
1118 | return NULL; | |
1119 | } | |
1120 | obj = found; | |
1121 | } | |
1122 | ||
1123 | if (ambiguous && *ambiguous) { | |
1124 | return NULL; | |
1125 | } | |
1126 | } | |
1127 | ||
1128 | return obj; | |
1129 | } | |
1130 | ||
02fe2db6 PB |
1131 | Object *object_resolve_path_type(const char *path, const char *typename, |
1132 | bool *ambiguous) | |
57c9fafe AL |
1133 | { |
1134 | bool partial_path = true; | |
1135 | Object *obj; | |
1136 | gchar **parts; | |
1137 | ||
1138 | parts = g_strsplit(path, "/", 0); | |
1139 | if (parts == NULL || parts[0] == NULL) { | |
1140 | g_strfreev(parts); | |
1141 | return object_get_root(); | |
1142 | } | |
1143 | ||
1144 | if (strcmp(parts[0], "") == 0) { | |
1145 | partial_path = false; | |
1146 | } | |
1147 | ||
1148 | if (partial_path) { | |
1149 | if (ambiguous) { | |
1150 | *ambiguous = false; | |
1151 | } | |
02fe2db6 PB |
1152 | obj = object_resolve_partial_path(object_get_root(), parts, |
1153 | typename, ambiguous); | |
57c9fafe | 1154 | } else { |
02fe2db6 | 1155 | obj = object_resolve_abs_path(object_get_root(), parts, typename, 1); |
57c9fafe AL |
1156 | } |
1157 | ||
1158 | g_strfreev(parts); | |
1159 | ||
1160 | return obj; | |
1161 | } | |
1162 | ||
02fe2db6 PB |
1163 | Object *object_resolve_path(const char *path, bool *ambiguous) |
1164 | { | |
1165 | return object_resolve_path_type(path, TYPE_OBJECT, ambiguous); | |
1166 | } | |
1167 | ||
57c9fafe AL |
1168 | typedef struct StringProperty |
1169 | { | |
1170 | char *(*get)(Object *, Error **); | |
1171 | void (*set)(Object *, const char *, Error **); | |
1172 | } StringProperty; | |
1173 | ||
7b7b7d18 PB |
1174 | static void property_get_str(Object *obj, Visitor *v, void *opaque, |
1175 | const char *name, Error **errp) | |
57c9fafe AL |
1176 | { |
1177 | StringProperty *prop = opaque; | |
1178 | char *value; | |
1179 | ||
1180 | value = prop->get(obj, errp); | |
1181 | if (value) { | |
1182 | visit_type_str(v, &value, name, errp); | |
1183 | g_free(value); | |
1184 | } | |
1185 | } | |
1186 | ||
7b7b7d18 PB |
1187 | static void property_set_str(Object *obj, Visitor *v, void *opaque, |
1188 | const char *name, Error **errp) | |
57c9fafe AL |
1189 | { |
1190 | StringProperty *prop = opaque; | |
1191 | char *value; | |
1192 | Error *local_err = NULL; | |
1193 | ||
1194 | visit_type_str(v, &value, name, &local_err); | |
1195 | if (local_err) { | |
1196 | error_propagate(errp, local_err); | |
1197 | return; | |
1198 | } | |
1199 | ||
1200 | prop->set(obj, value, errp); | |
1201 | g_free(value); | |
1202 | } | |
1203 | ||
7b7b7d18 PB |
1204 | static void property_release_str(Object *obj, const char *name, |
1205 | void *opaque) | |
57c9fafe AL |
1206 | { |
1207 | StringProperty *prop = opaque; | |
1208 | g_free(prop); | |
1209 | } | |
1210 | ||
1211 | void object_property_add_str(Object *obj, const char *name, | |
1212 | char *(*get)(Object *, Error **), | |
1213 | void (*set)(Object *, const char *, Error **), | |
1214 | Error **errp) | |
1215 | { | |
1216 | StringProperty *prop = g_malloc0(sizeof(*prop)); | |
1217 | ||
1218 | prop->get = get; | |
1219 | prop->set = set; | |
1220 | ||
1221 | object_property_add(obj, name, "string", | |
7b7b7d18 PB |
1222 | get ? property_get_str : NULL, |
1223 | set ? property_set_str : NULL, | |
1224 | property_release_str, | |
57c9fafe AL |
1225 | prop, errp); |
1226 | } | |
745549c8 PB |
1227 | |
1228 | static void register_types(void) | |
1229 | { | |
1230 | static TypeInfo interface_info = { | |
1231 | .name = TYPE_INTERFACE, | |
1232 | .instance_size = sizeof(Interface), | |
1233 | .abstract = true, | |
1234 | }; | |
1235 | ||
1236 | static TypeInfo object_info = { | |
1237 | .name = TYPE_OBJECT, | |
1238 | .instance_size = sizeof(Object), | |
1239 | .abstract = true, | |
1240 | }; | |
1241 | ||
1242 | type_interface = type_register_static(&interface_info); | |
1243 | type_register_static(&object_info); | |
1244 | } | |
1245 | ||
1246 | type_init(register_types) |