root / qom / object.c @ e998fa8d
History | View | Annotate | Download (30 kB)
1 |
/*
|
---|---|
2 |
* QEMU Object Model
|
3 |
*
|
4 |
* Copyright IBM, Corp. 2011
|
5 |
*
|
6 |
* Authors:
|
7 |
* Anthony Liguori <aliguori@us.ibm.com>
|
8 |
*
|
9 |
* This work is licensed under the terms of the GNU GPL, version 2 or later.
|
10 |
* See the COPYING file in the top-level directory.
|
11 |
*/
|
12 |
|
13 |
#include "qom/object.h" |
14 |
#include "qemu-common.h" |
15 |
#include "qapi/visitor.h" |
16 |
#include "qapi/string-input-visitor.h" |
17 |
#include "qapi/string-output-visitor.h" |
18 |
#include "qapi/qmp/qerror.h" |
19 |
|
20 |
/* TODO: replace QObject with a simpler visitor to avoid a dependency
|
21 |
* of the QOM core on QObject? */
|
22 |
#include "qom/qom-qobject.h" |
23 |
#include "qapi/qmp/qobject.h" |
24 |
#include "qapi/qmp/qbool.h" |
25 |
#include "qapi/qmp/qint.h" |
26 |
#include "qapi/qmp/qstring.h" |
27 |
|
28 |
#define MAX_INTERFACES 32 |
29 |
|
30 |
typedef struct InterfaceImpl InterfaceImpl; |
31 |
typedef struct TypeImpl TypeImpl; |
32 |
|
33 |
struct InterfaceImpl
|
34 |
{ |
35 |
const char *typename; |
36 |
}; |
37 |
|
38 |
struct TypeImpl
|
39 |
{ |
40 |
const char *name; |
41 |
|
42 |
size_t class_size; |
43 |
|
44 |
size_t instance_size; |
45 |
|
46 |
void (*class_init)(ObjectClass *klass, void *data); |
47 |
void (*class_base_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 |
static Type type_interface;
|
67 |
|
68 |
static GHashTable *type_table_get(void) |
69 |
{ |
70 |
static GHashTable *type_table;
|
71 |
|
72 |
if (type_table == NULL) { |
73 |
type_table = g_hash_table_new(g_str_hash, g_str_equal); |
74 |
} |
75 |
|
76 |
return type_table;
|
77 |
} |
78 |
|
79 |
static void type_table_add(TypeImpl *ti) |
80 |
{ |
81 |
g_hash_table_insert(type_table_get(), (void *)ti->name, ti);
|
82 |
} |
83 |
|
84 |
static TypeImpl *type_table_lookup(const char *name) |
85 |
{ |
86 |
return g_hash_table_lookup(type_table_get(), name);
|
87 |
} |
88 |
|
89 |
static TypeImpl *type_register_internal(const TypeInfo *info) |
90 |
{ |
91 |
TypeImpl *ti = g_malloc0(sizeof(*ti));
|
92 |
int i;
|
93 |
|
94 |
g_assert(info->name != NULL);
|
95 |
|
96 |
if (type_table_lookup(info->name) != NULL) { |
97 |
fprintf(stderr, "Registering `%s' which already exists\n", info->name);
|
98 |
abort(); |
99 |
} |
100 |
|
101 |
ti->name = g_strdup(info->name); |
102 |
ti->parent = g_strdup(info->parent); |
103 |
|
104 |
ti->class_size = info->class_size; |
105 |
ti->instance_size = info->instance_size; |
106 |
|
107 |
ti->class_init = info->class_init; |
108 |
ti->class_base_init = info->class_base_init; |
109 |
ti->class_finalize = info->class_finalize; |
110 |
ti->class_data = info->class_data; |
111 |
|
112 |
ti->instance_init = info->instance_init; |
113 |
ti->instance_finalize = info->instance_finalize; |
114 |
|
115 |
ti->abstract = info->abstract; |
116 |
|
117 |
for (i = 0; info->interfaces && info->interfaces[i].type; i++) { |
118 |
ti->interfaces[i].typename = g_strdup(info->interfaces[i].type); |
119 |
} |
120 |
ti->num_interfaces = i; |
121 |
|
122 |
type_table_add(ti); |
123 |
|
124 |
return ti;
|
125 |
} |
126 |
|
127 |
TypeImpl *type_register(const TypeInfo *info)
|
128 |
{ |
129 |
assert(info->parent); |
130 |
return type_register_internal(info);
|
131 |
} |
132 |
|
133 |
TypeImpl *type_register_static(const TypeInfo *info)
|
134 |
{ |
135 |
return type_register(info);
|
136 |
} |
137 |
|
138 |
static TypeImpl *type_get_by_name(const char *name) |
139 |
{ |
140 |
if (name == NULL) { |
141 |
return NULL; |
142 |
} |
143 |
|
144 |
return type_table_lookup(name);
|
145 |
} |
146 |
|
147 |
static TypeImpl *type_get_parent(TypeImpl *type)
|
148 |
{ |
149 |
if (!type->parent_type && type->parent) {
|
150 |
type->parent_type = type_get_by_name(type->parent); |
151 |
g_assert(type->parent_type != NULL);
|
152 |
} |
153 |
|
154 |
return type->parent_type;
|
155 |
} |
156 |
|
157 |
static bool type_has_parent(TypeImpl *type) |
158 |
{ |
159 |
return (type->parent != NULL); |
160 |
} |
161 |
|
162 |
static size_t type_class_get_size(TypeImpl *ti)
|
163 |
{ |
164 |
if (ti->class_size) {
|
165 |
return ti->class_size;
|
166 |
} |
167 |
|
168 |
if (type_has_parent(ti)) {
|
169 |
return type_class_get_size(type_get_parent(ti));
|
170 |
} |
171 |
|
172 |
return sizeof(ObjectClass); |
173 |
} |
174 |
|
175 |
static size_t type_object_get_size(TypeImpl *ti)
|
176 |
{ |
177 |
if (ti->instance_size) {
|
178 |
return ti->instance_size;
|
179 |
} |
180 |
|
181 |
if (type_has_parent(ti)) {
|
182 |
return type_object_get_size(type_get_parent(ti));
|
183 |
} |
184 |
|
185 |
return 0; |
186 |
} |
187 |
|
188 |
static bool type_is_ancestor(TypeImpl *type, TypeImpl *target_type) |
189 |
{ |
190 |
assert(target_type); |
191 |
|
192 |
/* Check if typename is a direct ancestor of type */
|
193 |
while (type) {
|
194 |
if (type == target_type) {
|
195 |
return true; |
196 |
} |
197 |
|
198 |
type = type_get_parent(type); |
199 |
} |
200 |
|
201 |
return false; |
202 |
} |
203 |
|
204 |
static void type_initialize(TypeImpl *ti); |
205 |
|
206 |
static void type_initialize_interface(TypeImpl *ti, const char *parent) |
207 |
{ |
208 |
InterfaceClass *new_iface; |
209 |
TypeInfo info = { }; |
210 |
TypeImpl *iface_impl; |
211 |
|
212 |
info.parent = parent; |
213 |
info.name = g_strdup_printf("%s::%s", ti->name, info.parent);
|
214 |
info.abstract = true;
|
215 |
|
216 |
iface_impl = type_register(&info); |
217 |
type_initialize(iface_impl); |
218 |
g_free((char *)info.name);
|
219 |
|
220 |
new_iface = (InterfaceClass *)iface_impl->class; |
221 |
new_iface->concrete_class = ti->class; |
222 |
|
223 |
ti->class->interfaces = g_slist_append(ti->class->interfaces, |
224 |
iface_impl->class); |
225 |
} |
226 |
|
227 |
static void type_initialize(TypeImpl *ti) |
228 |
{ |
229 |
TypeImpl *parent; |
230 |
|
231 |
if (ti->class) {
|
232 |
return;
|
233 |
} |
234 |
|
235 |
ti->class_size = type_class_get_size(ti); |
236 |
ti->instance_size = type_object_get_size(ti); |
237 |
|
238 |
ti->class = g_malloc0(ti->class_size); |
239 |
|
240 |
parent = type_get_parent(ti); |
241 |
if (parent) {
|
242 |
type_initialize(parent); |
243 |
GSList *e; |
244 |
int i;
|
245 |
|
246 |
g_assert(parent->class_size <= ti->class_size); |
247 |
memcpy(ti->class, parent->class, parent->class_size); |
248 |
ti->class->interfaces = NULL;
|
249 |
|
250 |
for (e = parent->class->interfaces; e; e = e->next) {
|
251 |
ObjectClass *iface = e->data; |
252 |
type_initialize_interface(ti, object_class_get_name(iface)); |
253 |
} |
254 |
|
255 |
for (i = 0; i < ti->num_interfaces; i++) { |
256 |
TypeImpl *t = type_get_by_name(ti->interfaces[i].typename); |
257 |
for (e = ti->class->interfaces; e; e = e->next) {
|
258 |
TypeImpl *target_type = OBJECT_CLASS(e->data)->type; |
259 |
|
260 |
if (type_is_ancestor(target_type, t)) {
|
261 |
break;
|
262 |
} |
263 |
} |
264 |
|
265 |
if (e) {
|
266 |
continue;
|
267 |
} |
268 |
|
269 |
type_initialize_interface(ti, ti->interfaces[i].typename); |
270 |
} |
271 |
} |
272 |
|
273 |
ti->class->type = ti; |
274 |
|
275 |
while (parent) {
|
276 |
if (parent->class_base_init) {
|
277 |
parent->class_base_init(ti->class, ti->class_data); |
278 |
} |
279 |
parent = type_get_parent(parent); |
280 |
} |
281 |
|
282 |
if (ti->class_init) {
|
283 |
ti->class_init(ti->class, ti->class_data); |
284 |
} |
285 |
|
286 |
|
287 |
} |
288 |
|
289 |
static void object_init_with_type(Object *obj, TypeImpl *ti) |
290 |
{ |
291 |
if (type_has_parent(ti)) {
|
292 |
object_init_with_type(obj, type_get_parent(ti)); |
293 |
} |
294 |
|
295 |
if (ti->instance_init) {
|
296 |
ti->instance_init(obj); |
297 |
} |
298 |
} |
299 |
|
300 |
void object_initialize_with_type(void *data, TypeImpl *type) |
301 |
{ |
302 |
Object *obj = data; |
303 |
|
304 |
g_assert(type != NULL);
|
305 |
type_initialize(type); |
306 |
|
307 |
g_assert(type->instance_size >= sizeof(Object));
|
308 |
g_assert(type->abstract == false);
|
309 |
|
310 |
memset(obj, 0, type->instance_size);
|
311 |
obj->class = type->class; |
312 |
object_ref(obj); |
313 |
QTAILQ_INIT(&obj->properties); |
314 |
object_init_with_type(obj, type); |
315 |
} |
316 |
|
317 |
void object_initialize(void *data, const char *typename) |
318 |
{ |
319 |
TypeImpl *type = type_get_by_name(typename); |
320 |
|
321 |
object_initialize_with_type(data, type); |
322 |
} |
323 |
|
324 |
static inline bool object_property_is_child(ObjectProperty *prop) |
325 |
{ |
326 |
return strstart(prop->type, "child<", NULL); |
327 |
} |
328 |
|
329 |
static inline bool object_property_is_link(ObjectProperty *prop) |
330 |
{ |
331 |
return strstart(prop->type, "link<", NULL); |
332 |
} |
333 |
|
334 |
static void object_property_del_all(Object *obj) |
335 |
{ |
336 |
while (!QTAILQ_EMPTY(&obj->properties)) {
|
337 |
ObjectProperty *prop = QTAILQ_FIRST(&obj->properties); |
338 |
|
339 |
QTAILQ_REMOVE(&obj->properties, prop, node); |
340 |
|
341 |
if (prop->release) {
|
342 |
prop->release(obj, prop->name, prop->opaque); |
343 |
} |
344 |
|
345 |
g_free(prop->name); |
346 |
g_free(prop->type); |
347 |
g_free(prop); |
348 |
} |
349 |
} |
350 |
|
351 |
static void object_property_del_child(Object *obj, Object *child, Error **errp) |
352 |
{ |
353 |
ObjectProperty *prop; |
354 |
|
355 |
QTAILQ_FOREACH(prop, &obj->properties, node) { |
356 |
if (object_property_is_child(prop) && prop->opaque == child) {
|
357 |
object_property_del(obj, prop->name, errp); |
358 |
break;
|
359 |
} |
360 |
} |
361 |
} |
362 |
|
363 |
void object_unparent(Object *obj)
|
364 |
{ |
365 |
object_ref(obj); |
366 |
if (obj->class->unparent) {
|
367 |
(obj->class->unparent)(obj); |
368 |
} |
369 |
if (obj->parent) {
|
370 |
object_property_del_child(obj->parent, obj, NULL);
|
371 |
} |
372 |
object_unref(obj); |
373 |
} |
374 |
|
375 |
static void object_deinit(Object *obj, TypeImpl *type) |
376 |
{ |
377 |
if (type->instance_finalize) {
|
378 |
type->instance_finalize(obj); |
379 |
} |
380 |
|
381 |
if (type_has_parent(type)) {
|
382 |
object_deinit(obj, type_get_parent(type)); |
383 |
} |
384 |
} |
385 |
|
386 |
static void object_finalize(void *data) |
387 |
{ |
388 |
Object *obj = data; |
389 |
TypeImpl *ti = obj->class->type; |
390 |
|
391 |
object_deinit(obj, ti); |
392 |
object_property_del_all(obj); |
393 |
|
394 |
g_assert(obj->ref == 0);
|
395 |
if (obj->free) {
|
396 |
obj->free(obj); |
397 |
} |
398 |
} |
399 |
|
400 |
Object *object_new_with_type(Type type) |
401 |
{ |
402 |
Object *obj; |
403 |
|
404 |
g_assert(type != NULL);
|
405 |
type_initialize(type); |
406 |
|
407 |
obj = g_malloc(type->instance_size); |
408 |
object_initialize_with_type(obj, type); |
409 |
obj->free = g_free; |
410 |
|
411 |
return obj;
|
412 |
} |
413 |
|
414 |
Object *object_new(const char *typename) |
415 |
{ |
416 |
TypeImpl *ti = type_get_by_name(typename); |
417 |
|
418 |
return object_new_with_type(ti);
|
419 |
} |
420 |
|
421 |
Object *object_dynamic_cast(Object *obj, const char *typename) |
422 |
{ |
423 |
if (obj && object_class_dynamic_cast(object_get_class(obj), typename)) {
|
424 |
return obj;
|
425 |
} |
426 |
|
427 |
return NULL; |
428 |
} |
429 |
|
430 |
Object *object_dynamic_cast_assert(Object *obj, const char *typename) |
431 |
{ |
432 |
Object *inst; |
433 |
|
434 |
inst = object_dynamic_cast(obj, typename); |
435 |
|
436 |
if (!inst && obj) {
|
437 |
fprintf(stderr, "Object %p is not an instance of type %s\n",
|
438 |
obj, typename); |
439 |
abort(); |
440 |
} |
441 |
|
442 |
return inst;
|
443 |
} |
444 |
|
445 |
ObjectClass *object_class_dynamic_cast(ObjectClass *class, |
446 |
const char *typename) |
447 |
{ |
448 |
TypeImpl *target_type = type_get_by_name(typename); |
449 |
TypeImpl *type = class->type; |
450 |
ObjectClass *ret = NULL;
|
451 |
|
452 |
if (type->class->interfaces &&
|
453 |
type_is_ancestor(target_type, type_interface)) { |
454 |
int found = 0; |
455 |
GSList *i; |
456 |
|
457 |
for (i = class->interfaces; i; i = i->next) {
|
458 |
ObjectClass *target_class = i->data; |
459 |
|
460 |
if (type_is_ancestor(target_class->type, target_type)) {
|
461 |
ret = target_class; |
462 |
found++; |
463 |
} |
464 |
} |
465 |
|
466 |
/* The match was ambiguous, don't allow a cast */
|
467 |
if (found > 1) { |
468 |
ret = NULL;
|
469 |
} |
470 |
} else if (type_is_ancestor(type, target_type)) { |
471 |
ret = class; |
472 |
} |
473 |
|
474 |
return ret;
|
475 |
} |
476 |
|
477 |
ObjectClass *object_class_dynamic_cast_assert(ObjectClass *class, |
478 |
const char *typename) |
479 |
{ |
480 |
ObjectClass *ret = object_class_dynamic_cast(class, typename); |
481 |
|
482 |
if (!ret) {
|
483 |
fprintf(stderr, "Object %p is not an instance of type %s\n",
|
484 |
class, typename); |
485 |
abort(); |
486 |
} |
487 |
|
488 |
return ret;
|
489 |
} |
490 |
|
491 |
const char *object_get_typename(Object *obj) |
492 |
{ |
493 |
return obj->class->type->name;
|
494 |
} |
495 |
|
496 |
ObjectClass *object_get_class(Object *obj) |
497 |
{ |
498 |
return obj->class;
|
499 |
} |
500 |
|
501 |
bool object_class_is_abstract(ObjectClass *klass)
|
502 |
{ |
503 |
return klass->type->abstract;
|
504 |
} |
505 |
|
506 |
const char *object_class_get_name(ObjectClass *klass) |
507 |
{ |
508 |
return klass->type->name;
|
509 |
} |
510 |
|
511 |
ObjectClass *object_class_by_name(const char *typename) |
512 |
{ |
513 |
TypeImpl *type = type_get_by_name(typename); |
514 |
|
515 |
if (!type) {
|
516 |
return NULL; |
517 |
} |
518 |
|
519 |
type_initialize(type); |
520 |
|
521 |
return type->class;
|
522 |
} |
523 |
|
524 |
ObjectClass *object_class_get_parent(ObjectClass *class) |
525 |
{ |
526 |
TypeImpl *type = type_get_parent(class->type); |
527 |
|
528 |
if (!type) {
|
529 |
return NULL; |
530 |
} |
531 |
|
532 |
type_initialize(type); |
533 |
|
534 |
return type->class;
|
535 |
} |
536 |
|
537 |
typedef struct OCFData |
538 |
{ |
539 |
void (*fn)(ObjectClass *klass, void *opaque); |
540 |
const char *implements_type; |
541 |
bool include_abstract;
|
542 |
void *opaque;
|
543 |
} OCFData; |
544 |
|
545 |
static void object_class_foreach_tramp(gpointer key, gpointer value, |
546 |
gpointer opaque) |
547 |
{ |
548 |
OCFData *data = opaque; |
549 |
TypeImpl *type = value; |
550 |
ObjectClass *k; |
551 |
|
552 |
type_initialize(type); |
553 |
k = type->class; |
554 |
|
555 |
if (!data->include_abstract && type->abstract) {
|
556 |
return;
|
557 |
} |
558 |
|
559 |
if (data->implements_type &&
|
560 |
!object_class_dynamic_cast(k, data->implements_type)) { |
561 |
return;
|
562 |
} |
563 |
|
564 |
data->fn(k, data->opaque); |
565 |
} |
566 |
|
567 |
void object_class_foreach(void (*fn)(ObjectClass *klass, void *opaque), |
568 |
const char *implements_type, bool include_abstract, |
569 |
void *opaque)
|
570 |
{ |
571 |
OCFData data = { fn, implements_type, include_abstract, opaque }; |
572 |
|
573 |
g_hash_table_foreach(type_table_get(), object_class_foreach_tramp, &data); |
574 |
} |
575 |
|
576 |
int object_child_foreach(Object *obj, int (*fn)(Object *child, void *opaque), |
577 |
void *opaque)
|
578 |
{ |
579 |
ObjectProperty *prop; |
580 |
int ret = 0; |
581 |
|
582 |
QTAILQ_FOREACH(prop, &obj->properties, node) { |
583 |
if (object_property_is_child(prop)) {
|
584 |
ret = fn(prop->opaque, opaque); |
585 |
if (ret != 0) { |
586 |
break;
|
587 |
} |
588 |
} |
589 |
} |
590 |
return ret;
|
591 |
} |
592 |
|
593 |
static void object_class_get_list_tramp(ObjectClass *klass, void *opaque) |
594 |
{ |
595 |
GSList **list = opaque; |
596 |
|
597 |
*list = g_slist_prepend(*list, klass); |
598 |
} |
599 |
|
600 |
GSList *object_class_get_list(const char *implements_type, |
601 |
bool include_abstract)
|
602 |
{ |
603 |
GSList *list = NULL;
|
604 |
|
605 |
object_class_foreach(object_class_get_list_tramp, |
606 |
implements_type, include_abstract, &list); |
607 |
return list;
|
608 |
} |
609 |
|
610 |
void object_ref(Object *obj)
|
611 |
{ |
612 |
obj->ref++; |
613 |
} |
614 |
|
615 |
void object_unref(Object *obj)
|
616 |
{ |
617 |
g_assert(obj->ref > 0);
|
618 |
obj->ref--; |
619 |
|
620 |
/* parent always holds a reference to its children */
|
621 |
if (obj->ref == 0) { |
622 |
object_finalize(obj); |
623 |
} |
624 |
} |
625 |
|
626 |
void object_property_add(Object *obj, const char *name, const char *type, |
627 |
ObjectPropertyAccessor *get, |
628 |
ObjectPropertyAccessor *set, |
629 |
ObjectPropertyRelease *release, |
630 |
void *opaque, Error **errp)
|
631 |
{ |
632 |
ObjectProperty *prop = g_malloc0(sizeof(*prop));
|
633 |
|
634 |
prop->name = g_strdup(name); |
635 |
prop->type = g_strdup(type); |
636 |
|
637 |
prop->get = get; |
638 |
prop->set = set; |
639 |
prop->release = release; |
640 |
prop->opaque = opaque; |
641 |
|
642 |
QTAILQ_INSERT_TAIL(&obj->properties, prop, node); |
643 |
} |
644 |
|
645 |
ObjectProperty *object_property_find(Object *obj, const char *name, |
646 |
Error **errp) |
647 |
{ |
648 |
ObjectProperty *prop; |
649 |
|
650 |
QTAILQ_FOREACH(prop, &obj->properties, node) { |
651 |
if (strcmp(prop->name, name) == 0) { |
652 |
return prop;
|
653 |
} |
654 |
} |
655 |
|
656 |
error_set(errp, QERR_PROPERTY_NOT_FOUND, "", name);
|
657 |
return NULL; |
658 |
} |
659 |
|
660 |
void object_property_del(Object *obj, const char *name, Error **errp) |
661 |
{ |
662 |
ObjectProperty *prop = object_property_find(obj, name, errp); |
663 |
if (prop == NULL) { |
664 |
return;
|
665 |
} |
666 |
|
667 |
if (prop->release) {
|
668 |
prop->release(obj, name, prop->opaque); |
669 |
} |
670 |
|
671 |
QTAILQ_REMOVE(&obj->properties, prop, node); |
672 |
|
673 |
g_free(prop->name); |
674 |
g_free(prop->type); |
675 |
g_free(prop); |
676 |
} |
677 |
|
678 |
void object_property_get(Object *obj, Visitor *v, const char *name, |
679 |
Error **errp) |
680 |
{ |
681 |
ObjectProperty *prop = object_property_find(obj, name, errp); |
682 |
if (prop == NULL) { |
683 |
return;
|
684 |
} |
685 |
|
686 |
if (!prop->get) {
|
687 |
error_set(errp, QERR_PERMISSION_DENIED); |
688 |
} else {
|
689 |
prop->get(obj, v, prop->opaque, name, errp); |
690 |
} |
691 |
} |
692 |
|
693 |
void object_property_set(Object *obj, Visitor *v, const char *name, |
694 |
Error **errp) |
695 |
{ |
696 |
ObjectProperty *prop = object_property_find(obj, name, errp); |
697 |
if (prop == NULL) { |
698 |
return;
|
699 |
} |
700 |
|
701 |
if (!prop->set) {
|
702 |
error_set(errp, QERR_PERMISSION_DENIED); |
703 |
} else {
|
704 |
prop->set(obj, v, prop->opaque, name, errp); |
705 |
} |
706 |
} |
707 |
|
708 |
void object_property_set_str(Object *obj, const char *value, |
709 |
const char *name, Error **errp) |
710 |
{ |
711 |
QString *qstr = qstring_from_str(value); |
712 |
object_property_set_qobject(obj, QOBJECT(qstr), name, errp); |
713 |
|
714 |
QDECREF(qstr); |
715 |
} |
716 |
|
717 |
char *object_property_get_str(Object *obj, const char *name, |
718 |
Error **errp) |
719 |
{ |
720 |
QObject *ret = object_property_get_qobject(obj, name, errp); |
721 |
QString *qstring; |
722 |
char *retval;
|
723 |
|
724 |
if (!ret) {
|
725 |
return NULL; |
726 |
} |
727 |
qstring = qobject_to_qstring(ret); |
728 |
if (!qstring) {
|
729 |
error_set(errp, QERR_INVALID_PARAMETER_TYPE, name, "string");
|
730 |
retval = NULL;
|
731 |
} else {
|
732 |
retval = g_strdup(qstring_get_str(qstring)); |
733 |
} |
734 |
|
735 |
QDECREF(qstring); |
736 |
return retval;
|
737 |
} |
738 |
|
739 |
void object_property_set_link(Object *obj, Object *value,
|
740 |
const char *name, Error **errp) |
741 |
{ |
742 |
object_property_set_str(obj, object_get_canonical_path(value), |
743 |
name, errp); |
744 |
} |
745 |
|
746 |
Object *object_property_get_link(Object *obj, const char *name, |
747 |
Error **errp) |
748 |
{ |
749 |
char *str = object_property_get_str(obj, name, errp);
|
750 |
Object *target = NULL;
|
751 |
|
752 |
if (str && *str) {
|
753 |
target = object_resolve_path(str, NULL);
|
754 |
if (!target) {
|
755 |
error_set(errp, QERR_DEVICE_NOT_FOUND, str); |
756 |
} |
757 |
} |
758 |
|
759 |
g_free(str); |
760 |
return target;
|
761 |
} |
762 |
|
763 |
void object_property_set_bool(Object *obj, bool value, |
764 |
const char *name, Error **errp) |
765 |
{ |
766 |
QBool *qbool = qbool_from_int(value); |
767 |
object_property_set_qobject(obj, QOBJECT(qbool), name, errp); |
768 |
|
769 |
QDECREF(qbool); |
770 |
} |
771 |
|
772 |
bool object_property_get_bool(Object *obj, const char *name, |
773 |
Error **errp) |
774 |
{ |
775 |
QObject *ret = object_property_get_qobject(obj, name, errp); |
776 |
QBool *qbool; |
777 |
bool retval;
|
778 |
|
779 |
if (!ret) {
|
780 |
return false; |
781 |
} |
782 |
qbool = qobject_to_qbool(ret); |
783 |
if (!qbool) {
|
784 |
error_set(errp, QERR_INVALID_PARAMETER_TYPE, name, "boolean");
|
785 |
retval = false;
|
786 |
} else {
|
787 |
retval = qbool_get_int(qbool); |
788 |
} |
789 |
|
790 |
QDECREF(qbool); |
791 |
return retval;
|
792 |
} |
793 |
|
794 |
void object_property_set_int(Object *obj, int64_t value,
|
795 |
const char *name, Error **errp) |
796 |
{ |
797 |
QInt *qint = qint_from_int(value); |
798 |
object_property_set_qobject(obj, QOBJECT(qint), name, errp); |
799 |
|
800 |
QDECREF(qint); |
801 |
} |
802 |
|
803 |
int64_t object_property_get_int(Object *obj, const char *name, |
804 |
Error **errp) |
805 |
{ |
806 |
QObject *ret = object_property_get_qobject(obj, name, errp); |
807 |
QInt *qint; |
808 |
int64_t retval; |
809 |
|
810 |
if (!ret) {
|
811 |
return -1; |
812 |
} |
813 |
qint = qobject_to_qint(ret); |
814 |
if (!qint) {
|
815 |
error_set(errp, QERR_INVALID_PARAMETER_TYPE, name, "int");
|
816 |
retval = -1;
|
817 |
} else {
|
818 |
retval = qint_get_int(qint); |
819 |
} |
820 |
|
821 |
QDECREF(qint); |
822 |
return retval;
|
823 |
} |
824 |
|
825 |
void object_property_parse(Object *obj, const char *string, |
826 |
const char *name, Error **errp) |
827 |
{ |
828 |
StringInputVisitor *mi; |
829 |
mi = string_input_visitor_new(string); |
830 |
object_property_set(obj, string_input_get_visitor(mi), name, errp); |
831 |
|
832 |
string_input_visitor_cleanup(mi); |
833 |
} |
834 |
|
835 |
char *object_property_print(Object *obj, const char *name, |
836 |
Error **errp) |
837 |
{ |
838 |
StringOutputVisitor *mo; |
839 |
char *string;
|
840 |
|
841 |
mo = string_output_visitor_new(); |
842 |
object_property_get(obj, string_output_get_visitor(mo), name, errp); |
843 |
string = string_output_get_string(mo); |
844 |
string_output_visitor_cleanup(mo); |
845 |
return string;
|
846 |
} |
847 |
|
848 |
const char *object_property_get_type(Object *obj, const char *name, Error **errp) |
849 |
{ |
850 |
ObjectProperty *prop = object_property_find(obj, name, errp); |
851 |
if (prop == NULL) { |
852 |
return NULL; |
853 |
} |
854 |
|
855 |
return prop->type;
|
856 |
} |
857 |
|
858 |
Object *object_get_root(void)
|
859 |
{ |
860 |
static Object *root;
|
861 |
|
862 |
if (!root) {
|
863 |
root = object_new("container");
|
864 |
} |
865 |
|
866 |
return root;
|
867 |
} |
868 |
|
869 |
static void object_get_child_property(Object *obj, Visitor *v, void *opaque, |
870 |
const char *name, Error **errp) |
871 |
{ |
872 |
Object *child = opaque; |
873 |
gchar *path; |
874 |
|
875 |
path = object_get_canonical_path(child); |
876 |
visit_type_str(v, &path, name, errp); |
877 |
g_free(path); |
878 |
} |
879 |
|
880 |
static void object_finalize_child_property(Object *obj, const char *name, |
881 |
void *opaque)
|
882 |
{ |
883 |
Object *child = opaque; |
884 |
|
885 |
object_unref(child); |
886 |
} |
887 |
|
888 |
void object_property_add_child(Object *obj, const char *name, |
889 |
Object *child, Error **errp) |
890 |
{ |
891 |
gchar *type; |
892 |
|
893 |
type = g_strdup_printf("child<%s>", object_get_typename(OBJECT(child)));
|
894 |
|
895 |
object_property_add(obj, name, type, object_get_child_property, |
896 |
NULL, object_finalize_child_property, child, errp);
|
897 |
|
898 |
object_ref(child); |
899 |
g_assert(child->parent == NULL);
|
900 |
child->parent = obj; |
901 |
|
902 |
g_free(type); |
903 |
} |
904 |
|
905 |
static void object_get_link_property(Object *obj, Visitor *v, void *opaque, |
906 |
const char *name, Error **errp) |
907 |
{ |
908 |
Object **child = opaque; |
909 |
gchar *path; |
910 |
|
911 |
if (*child) {
|
912 |
path = object_get_canonical_path(*child); |
913 |
visit_type_str(v, &path, name, errp); |
914 |
g_free(path); |
915 |
} else {
|
916 |
path = (gchar *)"";
|
917 |
visit_type_str(v, &path, name, errp); |
918 |
} |
919 |
} |
920 |
|
921 |
static void object_set_link_property(Object *obj, Visitor *v, void *opaque, |
922 |
const char *name, Error **errp) |
923 |
{ |
924 |
Object **child = opaque; |
925 |
Object *old_target; |
926 |
bool ambiguous = false; |
927 |
const char *type; |
928 |
char *path;
|
929 |
gchar *target_type; |
930 |
|
931 |
type = object_property_get_type(obj, name, NULL);
|
932 |
|
933 |
visit_type_str(v, &path, name, errp); |
934 |
|
935 |
old_target = *child; |
936 |
*child = NULL;
|
937 |
|
938 |
if (strcmp(path, "") != 0) { |
939 |
Object *target; |
940 |
|
941 |
/* Go from link<FOO> to FOO. */
|
942 |
target_type = g_strndup(&type[5], strlen(type) - 6); |
943 |
target = object_resolve_path_type(path, target_type, &ambiguous); |
944 |
|
945 |
if (ambiguous) {
|
946 |
error_set(errp, QERR_AMBIGUOUS_PATH, path); |
947 |
} else if (target) { |
948 |
object_ref(target); |
949 |
*child = target; |
950 |
} else {
|
951 |
target = object_resolve_path(path, &ambiguous); |
952 |
if (target || ambiguous) {
|
953 |
error_set(errp, QERR_INVALID_PARAMETER_TYPE, name, target_type); |
954 |
} else {
|
955 |
error_set(errp, QERR_DEVICE_NOT_FOUND, path); |
956 |
} |
957 |
} |
958 |
g_free(target_type); |
959 |
} |
960 |
|
961 |
g_free(path); |
962 |
|
963 |
if (old_target != NULL) { |
964 |
object_unref(old_target); |
965 |
} |
966 |
} |
967 |
|
968 |
void object_property_add_link(Object *obj, const char *name, |
969 |
const char *type, Object **child, |
970 |
Error **errp) |
971 |
{ |
972 |
gchar *full_type; |
973 |
|
974 |
full_type = g_strdup_printf("link<%s>", type);
|
975 |
|
976 |
object_property_add(obj, name, full_type, |
977 |
object_get_link_property, |
978 |
object_set_link_property, |
979 |
NULL, child, errp);
|
980 |
|
981 |
g_free(full_type); |
982 |
} |
983 |
|
984 |
gchar *object_get_canonical_path(Object *obj) |
985 |
{ |
986 |
Object *root = object_get_root(); |
987 |
char *newpath = NULL, *path = NULL; |
988 |
|
989 |
while (obj != root) {
|
990 |
ObjectProperty *prop = NULL;
|
991 |
|
992 |
g_assert(obj->parent != NULL);
|
993 |
|
994 |
QTAILQ_FOREACH(prop, &obj->parent->properties, node) { |
995 |
if (!object_property_is_child(prop)) {
|
996 |
continue;
|
997 |
} |
998 |
|
999 |
if (prop->opaque == obj) {
|
1000 |
if (path) {
|
1001 |
newpath = g_strdup_printf("%s/%s", prop->name, path);
|
1002 |
g_free(path); |
1003 |
path = newpath; |
1004 |
} else {
|
1005 |
path = g_strdup(prop->name); |
1006 |
} |
1007 |
break;
|
1008 |
} |
1009 |
} |
1010 |
|
1011 |
g_assert(prop != NULL);
|
1012 |
|
1013 |
obj = obj->parent; |
1014 |
} |
1015 |
|
1016 |
newpath = g_strdup_printf("/%s", path);
|
1017 |
g_free(path); |
1018 |
|
1019 |
return newpath;
|
1020 |
} |
1021 |
|
1022 |
Object *object_resolve_path_component(Object *parent, const gchar *part)
|
1023 |
{ |
1024 |
ObjectProperty *prop = object_property_find(parent, part, NULL);
|
1025 |
if (prop == NULL) { |
1026 |
return NULL; |
1027 |
} |
1028 |
|
1029 |
if (object_property_is_link(prop)) {
|
1030 |
return *(Object **)prop->opaque;
|
1031 |
} else if (object_property_is_child(prop)) { |
1032 |
return prop->opaque;
|
1033 |
} else {
|
1034 |
return NULL; |
1035 |
} |
1036 |
} |
1037 |
|
1038 |
static Object *object_resolve_abs_path(Object *parent,
|
1039 |
gchar **parts, |
1040 |
const char *typename, |
1041 |
int index)
|
1042 |
{ |
1043 |
Object *child; |
1044 |
|
1045 |
if (parts[index] == NULL) { |
1046 |
return object_dynamic_cast(parent, typename);
|
1047 |
} |
1048 |
|
1049 |
if (strcmp(parts[index], "") == 0) { |
1050 |
return object_resolve_abs_path(parent, parts, typename, index + 1); |
1051 |
} |
1052 |
|
1053 |
child = object_resolve_path_component(parent, parts[index]); |
1054 |
if (!child) {
|
1055 |
return NULL; |
1056 |
} |
1057 |
|
1058 |
return object_resolve_abs_path(child, parts, typename, index + 1); |
1059 |
} |
1060 |
|
1061 |
static Object *object_resolve_partial_path(Object *parent,
|
1062 |
gchar **parts, |
1063 |
const char *typename, |
1064 |
bool *ambiguous)
|
1065 |
{ |
1066 |
Object *obj; |
1067 |
ObjectProperty *prop; |
1068 |
|
1069 |
obj = object_resolve_abs_path(parent, parts, typename, 0);
|
1070 |
|
1071 |
QTAILQ_FOREACH(prop, &parent->properties, node) { |
1072 |
Object *found; |
1073 |
|
1074 |
if (!object_property_is_child(prop)) {
|
1075 |
continue;
|
1076 |
} |
1077 |
|
1078 |
found = object_resolve_partial_path(prop->opaque, parts, |
1079 |
typename, ambiguous); |
1080 |
if (found) {
|
1081 |
if (obj) {
|
1082 |
if (ambiguous) {
|
1083 |
*ambiguous = true;
|
1084 |
} |
1085 |
return NULL; |
1086 |
} |
1087 |
obj = found; |
1088 |
} |
1089 |
|
1090 |
if (ambiguous && *ambiguous) {
|
1091 |
return NULL; |
1092 |
} |
1093 |
} |
1094 |
|
1095 |
return obj;
|
1096 |
} |
1097 |
|
1098 |
Object *object_resolve_path_type(const char *path, const char *typename, |
1099 |
bool *ambiguous)
|
1100 |
{ |
1101 |
bool partial_path = true; |
1102 |
Object *obj; |
1103 |
gchar **parts; |
1104 |
|
1105 |
parts = g_strsplit(path, "/", 0); |
1106 |
if (parts == NULL || parts[0] == NULL) { |
1107 |
g_strfreev(parts); |
1108 |
return object_get_root();
|
1109 |
} |
1110 |
|
1111 |
if (strcmp(parts[0], "") == 0) { |
1112 |
partial_path = false;
|
1113 |
} |
1114 |
|
1115 |
if (partial_path) {
|
1116 |
if (ambiguous) {
|
1117 |
*ambiguous = false;
|
1118 |
} |
1119 |
obj = object_resolve_partial_path(object_get_root(), parts, |
1120 |
typename, ambiguous); |
1121 |
} else {
|
1122 |
obj = object_resolve_abs_path(object_get_root(), parts, typename, 1);
|
1123 |
} |
1124 |
|
1125 |
g_strfreev(parts); |
1126 |
|
1127 |
return obj;
|
1128 |
} |
1129 |
|
1130 |
Object *object_resolve_path(const char *path, bool *ambiguous) |
1131 |
{ |
1132 |
return object_resolve_path_type(path, TYPE_OBJECT, ambiguous);
|
1133 |
} |
1134 |
|
1135 |
typedef struct StringProperty |
1136 |
{ |
1137 |
char *(*get)(Object *, Error **);
|
1138 |
void (*set)(Object *, const char *, Error **); |
1139 |
} StringProperty; |
1140 |
|
1141 |
static void property_get_str(Object *obj, Visitor *v, void *opaque, |
1142 |
const char *name, Error **errp) |
1143 |
{ |
1144 |
StringProperty *prop = opaque; |
1145 |
char *value;
|
1146 |
|
1147 |
value = prop->get(obj, errp); |
1148 |
if (value) {
|
1149 |
visit_type_str(v, &value, name, errp); |
1150 |
g_free(value); |
1151 |
} |
1152 |
} |
1153 |
|
1154 |
static void property_set_str(Object *obj, Visitor *v, void *opaque, |
1155 |
const char *name, Error **errp) |
1156 |
{ |
1157 |
StringProperty *prop = opaque; |
1158 |
char *value;
|
1159 |
Error *local_err = NULL;
|
1160 |
|
1161 |
visit_type_str(v, &value, name, &local_err); |
1162 |
if (local_err) {
|
1163 |
error_propagate(errp, local_err); |
1164 |
return;
|
1165 |
} |
1166 |
|
1167 |
prop->set(obj, value, errp); |
1168 |
g_free(value); |
1169 |
} |
1170 |
|
1171 |
static void property_release_str(Object *obj, const char *name, |
1172 |
void *opaque)
|
1173 |
{ |
1174 |
StringProperty *prop = opaque; |
1175 |
g_free(prop); |
1176 |
} |
1177 |
|
1178 |
void object_property_add_str(Object *obj, const char *name, |
1179 |
char *(*get)(Object *, Error **),
|
1180 |
void (*set)(Object *, const char *, Error **), |
1181 |
Error **errp) |
1182 |
{ |
1183 |
StringProperty *prop = g_malloc0(sizeof(*prop));
|
1184 |
|
1185 |
prop->get = get; |
1186 |
prop->set = set; |
1187 |
|
1188 |
object_property_add(obj, name, "string",
|
1189 |
get ? property_get_str : NULL,
|
1190 |
set ? property_set_str : NULL,
|
1191 |
property_release_str, |
1192 |
prop, errp); |
1193 |
} |
1194 |
|
1195 |
typedef struct BoolProperty |
1196 |
{ |
1197 |
bool (*get)(Object *, Error **);
|
1198 |
void (*set)(Object *, bool, Error **); |
1199 |
} BoolProperty; |
1200 |
|
1201 |
static void property_get_bool(Object *obj, Visitor *v, void *opaque, |
1202 |
const char *name, Error **errp) |
1203 |
{ |
1204 |
BoolProperty *prop = opaque; |
1205 |
bool value;
|
1206 |
|
1207 |
value = prop->get(obj, errp); |
1208 |
visit_type_bool(v, &value, name, errp); |
1209 |
} |
1210 |
|
1211 |
static void property_set_bool(Object *obj, Visitor *v, void *opaque, |
1212 |
const char *name, Error **errp) |
1213 |
{ |
1214 |
BoolProperty *prop = opaque; |
1215 |
bool value;
|
1216 |
Error *local_err = NULL;
|
1217 |
|
1218 |
visit_type_bool(v, &value, name, &local_err); |
1219 |
if (local_err) {
|
1220 |
error_propagate(errp, local_err); |
1221 |
return;
|
1222 |
} |
1223 |
|
1224 |
prop->set(obj, value, errp); |
1225 |
} |
1226 |
|
1227 |
static void property_release_bool(Object *obj, const char *name, |
1228 |
void *opaque)
|
1229 |
{ |
1230 |
BoolProperty *prop = opaque; |
1231 |
g_free(prop); |
1232 |
} |
1233 |
|
1234 |
void object_property_add_bool(Object *obj, const char *name, |
1235 |
bool (*get)(Object *, Error **),
|
1236 |
void (*set)(Object *, bool, Error **), |
1237 |
Error **errp) |
1238 |
{ |
1239 |
BoolProperty *prop = g_malloc0(sizeof(*prop));
|
1240 |
|
1241 |
prop->get = get; |
1242 |
prop->set = set; |
1243 |
|
1244 |
object_property_add(obj, name, "bool",
|
1245 |
get ? property_get_bool : NULL,
|
1246 |
set ? property_set_bool : NULL,
|
1247 |
property_release_bool, |
1248 |
prop, errp); |
1249 |
} |
1250 |
|
1251 |
static char *qdev_get_type(Object *obj, Error **errp) |
1252 |
{ |
1253 |
return g_strdup(object_get_typename(obj));
|
1254 |
} |
1255 |
|
1256 |
static void object_instance_init(Object *obj) |
1257 |
{ |
1258 |
object_property_add_str(obj, "type", qdev_get_type, NULL, NULL); |
1259 |
} |
1260 |
|
1261 |
static void register_types(void) |
1262 |
{ |
1263 |
static TypeInfo interface_info = {
|
1264 |
.name = TYPE_INTERFACE, |
1265 |
.class_size = sizeof(InterfaceClass),
|
1266 |
.abstract = true,
|
1267 |
}; |
1268 |
|
1269 |
static TypeInfo object_info = {
|
1270 |
.name = TYPE_OBJECT, |
1271 |
.instance_size = sizeof(Object),
|
1272 |
.instance_init = object_instance_init, |
1273 |
.abstract = true,
|
1274 |
}; |
1275 |
|
1276 |
type_interface = type_register_internal(&interface_info); |
1277 |
type_register_internal(&object_info); |
1278 |
} |
1279 |
|
1280 |
type_init(register_types) |