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15#include "qemu/osdep.h"
16#include "qapi/dealloc-visitor.h"
17#include "qemu/queue.h"
18#include "qemu-common.h"
19#include "qapi/qmp/types.h"
20#include "qapi/visitor-impl.h"
21
22typedef struct StackEntry
23{
24 void *value;
25 bool is_list_head;
26 QTAILQ_ENTRY(StackEntry) node;
27} StackEntry;
28
29struct QapiDeallocVisitor
30{
31 Visitor visitor;
32 QTAILQ_HEAD(, StackEntry) stack;
33};
34
35static QapiDeallocVisitor *to_qov(Visitor *v)
36{
37 return container_of(v, QapiDeallocVisitor, visitor);
38}
39
40static void qapi_dealloc_push(QapiDeallocVisitor *qov, void *value)
41{
42 StackEntry *e = g_malloc0(sizeof(*e));
43
44 e->value = value;
45
46
47 if (value == NULL) {
48 e->is_list_head = true;
49 }
50 QTAILQ_INSERT_HEAD(&qov->stack, e, node);
51}
52
53static void *qapi_dealloc_pop(QapiDeallocVisitor *qov)
54{
55 StackEntry *e = QTAILQ_FIRST(&qov->stack);
56 QObject *value;
57 QTAILQ_REMOVE(&qov->stack, e, node);
58 value = e->value;
59 g_free(e);
60 return value;
61}
62
63static void qapi_dealloc_start_struct(Visitor *v, const char *name, void **obj,
64 size_t unused, Error **errp)
65{
66 QapiDeallocVisitor *qov = to_qov(v);
67 qapi_dealloc_push(qov, obj);
68}
69
70static void qapi_dealloc_end_struct(Visitor *v, Error **errp)
71{
72 QapiDeallocVisitor *qov = to_qov(v);
73 void **obj = qapi_dealloc_pop(qov);
74 if (obj) {
75 g_free(*obj);
76 }
77}
78
79static void qapi_dealloc_start_alternate(Visitor *v, const char *name,
80 GenericAlternate **obj, size_t size,
81 bool promote_int, Error **errp)
82{
83 QapiDeallocVisitor *qov = to_qov(v);
84 qapi_dealloc_push(qov, obj);
85}
86
87static void qapi_dealloc_end_alternate(Visitor *v)
88{
89 QapiDeallocVisitor *qov = to_qov(v);
90 void **obj = qapi_dealloc_pop(qov);
91 if (obj) {
92 g_free(*obj);
93 }
94}
95
96static void qapi_dealloc_start_list(Visitor *v, const char *name, Error **errp)
97{
98 QapiDeallocVisitor *qov = to_qov(v);
99 qapi_dealloc_push(qov, NULL);
100}
101
102static GenericList *qapi_dealloc_next_list(Visitor *v, GenericList **listp,
103 size_t size)
104{
105 GenericList *list = *listp;
106 QapiDeallocVisitor *qov = to_qov(v);
107 StackEntry *e = QTAILQ_FIRST(&qov->stack);
108
109 if (e && e->is_list_head) {
110 e->is_list_head = false;
111 return list;
112 }
113
114 if (list) {
115 list = list->next;
116 g_free(*listp);
117 return list;
118 }
119
120 return NULL;
121}
122
123static void qapi_dealloc_end_list(Visitor *v)
124{
125 QapiDeallocVisitor *qov = to_qov(v);
126 void *obj = qapi_dealloc_pop(qov);
127 assert(obj == NULL);
128}
129
130static void qapi_dealloc_type_str(Visitor *v, const char *name, char **obj,
131 Error **errp)
132{
133 if (obj) {
134 g_free(*obj);
135 }
136}
137
138static void qapi_dealloc_type_int64(Visitor *v, const char *name, int64_t *obj,
139 Error **errp)
140{
141}
142
143static void qapi_dealloc_type_uint64(Visitor *v, const char *name,
144 uint64_t *obj, Error **errp)
145{
146}
147
148static void qapi_dealloc_type_bool(Visitor *v, const char *name, bool *obj,
149 Error **errp)
150{
151}
152
153static void qapi_dealloc_type_number(Visitor *v, const char *name, double *obj,
154 Error **errp)
155{
156}
157
158static void qapi_dealloc_type_anything(Visitor *v, const char *name,
159 QObject **obj, Error **errp)
160{
161 if (obj) {
162 qobject_decref(*obj);
163 }
164}
165
166static void qapi_dealloc_type_enum(Visitor *v, const char *name, int *obj,
167 const char * const strings[], Error **errp)
168{
169}
170
171Visitor *qapi_dealloc_get_visitor(QapiDeallocVisitor *v)
172{
173 return &v->visitor;
174}
175
176void qapi_dealloc_visitor_cleanup(QapiDeallocVisitor *v)
177{
178 g_free(v);
179}
180
181QapiDeallocVisitor *qapi_dealloc_visitor_new(void)
182{
183 QapiDeallocVisitor *v;
184
185 v = g_malloc0(sizeof(*v));
186
187 v->visitor.start_struct = qapi_dealloc_start_struct;
188 v->visitor.end_struct = qapi_dealloc_end_struct;
189 v->visitor.start_alternate = qapi_dealloc_start_alternate;
190 v->visitor.end_alternate = qapi_dealloc_end_alternate;
191 v->visitor.start_list = qapi_dealloc_start_list;
192 v->visitor.next_list = qapi_dealloc_next_list;
193 v->visitor.end_list = qapi_dealloc_end_list;
194 v->visitor.type_enum = qapi_dealloc_type_enum;
195 v->visitor.type_int64 = qapi_dealloc_type_int64;
196 v->visitor.type_uint64 = qapi_dealloc_type_uint64;
197 v->visitor.type_bool = qapi_dealloc_type_bool;
198 v->visitor.type_str = qapi_dealloc_type_str;
199 v->visitor.type_number = qapi_dealloc_type_number;
200 v->visitor.type_any = qapi_dealloc_type_anything;
201
202 QTAILQ_INIT(&v->stack);
203
204 return v;
205}
206