KVM: Update headers (except HIOR mess)
[qemu.git] / qapi / qapi-dealloc-visitor.c
1 /*
2 * Dealloc Visitor
3 *
4 * Copyright IBM, Corp. 2011
5 *
6 * Authors:
7 * Michael Roth <mdroth@linux.vnet.ibm.com>
8 *
9 * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
10 * See the COPYING.LIB file in the top-level directory.
11 *
12 */
13
14 #include "qapi-dealloc-visitor.h"
15 #include "qemu-queue.h"
16 #include "qemu-common.h"
17 #include "qemu-objects.h"
18
19 typedef struct StackEntry
20 {
21 void *value;
22 bool is_list_head;
23 QTAILQ_ENTRY(StackEntry) node;
24 } StackEntry;
25
26 struct QapiDeallocVisitor
27 {
28 Visitor visitor;
29 QTAILQ_HEAD(, StackEntry) stack;
30 bool is_list_head;
31 };
32
33 static QapiDeallocVisitor *to_qov(Visitor *v)
34 {
35 return container_of(v, QapiDeallocVisitor, visitor);
36 }
37
38 static void qapi_dealloc_push(QapiDeallocVisitor *qov, void *value)
39 {
40 StackEntry *e = g_malloc0(sizeof(*e));
41
42 e->value = value;
43
44 /* see if we're just pushing a list head tracker */
45 if (value == NULL) {
46 e->is_list_head = true;
47 }
48 QTAILQ_INSERT_HEAD(&qov->stack, e, node);
49 }
50
51 static void *qapi_dealloc_pop(QapiDeallocVisitor *qov)
52 {
53 StackEntry *e = QTAILQ_FIRST(&qov->stack);
54 QObject *value;
55 QTAILQ_REMOVE(&qov->stack, e, node);
56 value = e->value;
57 g_free(e);
58 return value;
59 }
60
61 static void qapi_dealloc_start_struct(Visitor *v, void **obj, const char *kind,
62 const char *name, size_t unused,
63 Error **errp)
64 {
65 QapiDeallocVisitor *qov = to_qov(v);
66 qapi_dealloc_push(qov, obj);
67 }
68
69 static void qapi_dealloc_end_struct(Visitor *v, Error **errp)
70 {
71 QapiDeallocVisitor *qov = to_qov(v);
72 void **obj = qapi_dealloc_pop(qov);
73 if (obj) {
74 g_free(*obj);
75 }
76 }
77
78 static void qapi_dealloc_start_list(Visitor *v, const char *name, Error **errp)
79 {
80 QapiDeallocVisitor *qov = to_qov(v);
81 qapi_dealloc_push(qov, NULL);
82 }
83
84 static GenericList *qapi_dealloc_next_list(Visitor *v, GenericList **listp,
85 Error **errp)
86 {
87 GenericList *list = *listp;
88 QapiDeallocVisitor *qov = to_qov(v);
89 StackEntry *e = QTAILQ_FIRST(&qov->stack);
90
91 if (e && e->is_list_head) {
92 e->is_list_head = false;
93 return list;
94 }
95
96 if (list) {
97 list = list->next;
98 g_free(*listp);
99 return list;
100 }
101
102 return NULL;
103 }
104
105 static void qapi_dealloc_end_list(Visitor *v, Error **errp)
106 {
107 QapiDeallocVisitor *qov = to_qov(v);
108 void *obj = qapi_dealloc_pop(qov);
109 assert(obj == NULL); /* should've been list head tracker with no payload */
110 }
111
112 static void qapi_dealloc_type_str(Visitor *v, char **obj, const char *name,
113 Error **errp)
114 {
115 if (obj) {
116 g_free(*obj);
117 }
118 }
119
120 static void qapi_dealloc_type_int(Visitor *v, int64_t *obj, const char *name,
121 Error **errp)
122 {
123 }
124
125 static void qapi_dealloc_type_bool(Visitor *v, bool *obj, const char *name,
126 Error **errp)
127 {
128 }
129
130 static void qapi_dealloc_type_number(Visitor *v, double *obj, const char *name,
131 Error **errp)
132 {
133 }
134
135 static void qapi_dealloc_type_enum(Visitor *v, int *obj, const char *strings[],
136 const char *kind, const char *name,
137 Error **errp)
138 {
139 }
140
141 Visitor *qapi_dealloc_get_visitor(QapiDeallocVisitor *v)
142 {
143 return &v->visitor;
144 }
145
146 void qapi_dealloc_visitor_cleanup(QapiDeallocVisitor *v)
147 {
148 g_free(v);
149 }
150
151 QapiDeallocVisitor *qapi_dealloc_visitor_new(void)
152 {
153 QapiDeallocVisitor *v;
154
155 v = g_malloc0(sizeof(*v));
156
157 v->visitor.start_struct = qapi_dealloc_start_struct;
158 v->visitor.end_struct = qapi_dealloc_end_struct;
159 v->visitor.start_list = qapi_dealloc_start_list;
160 v->visitor.next_list = qapi_dealloc_next_list;
161 v->visitor.end_list = qapi_dealloc_end_list;
162 v->visitor.type_enum = qapi_dealloc_type_enum;
163 v->visitor.type_int = qapi_dealloc_type_int;
164 v->visitor.type_bool = qapi_dealloc_type_bool;
165 v->visitor.type_str = qapi_dealloc_type_str;
166 v->visitor.type_number = qapi_dealloc_type_number;
167
168 QTAILQ_INIT(&v->stack);
169
170 return v;
171 }