root / qapi / qapi-dealloc-visitor.c @ 1de7afc9
History | View | Annotate | Download (4.3 kB)
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 "qapi/qmp/types.h" |
18 |
#include "qapi/visitor-impl.h" |
19 |
|
20 |
typedef struct StackEntry |
21 |
{ |
22 |
void *value;
|
23 |
bool is_list_head;
|
24 |
QTAILQ_ENTRY(StackEntry) node; |
25 |
} StackEntry; |
26 |
|
27 |
struct QapiDeallocVisitor
|
28 |
{ |
29 |
Visitor visitor; |
30 |
QTAILQ_HEAD(, StackEntry) stack; |
31 |
bool is_list_head;
|
32 |
}; |
33 |
|
34 |
static QapiDeallocVisitor *to_qov(Visitor *v)
|
35 |
{ |
36 |
return container_of(v, QapiDeallocVisitor, visitor);
|
37 |
} |
38 |
|
39 |
static void qapi_dealloc_push(QapiDeallocVisitor *qov, void *value) |
40 |
{ |
41 |
StackEntry *e = g_malloc0(sizeof(*e));
|
42 |
|
43 |
e->value = value; |
44 |
|
45 |
/* see if we're just pushing a list head tracker */
|
46 |
if (value == NULL) { |
47 |
e->is_list_head = true;
|
48 |
} |
49 |
QTAILQ_INSERT_HEAD(&qov->stack, e, node); |
50 |
} |
51 |
|
52 |
static void *qapi_dealloc_pop(QapiDeallocVisitor *qov) |
53 |
{ |
54 |
StackEntry *e = QTAILQ_FIRST(&qov->stack); |
55 |
QObject *value; |
56 |
QTAILQ_REMOVE(&qov->stack, e, node); |
57 |
value = e->value; |
58 |
g_free(e); |
59 |
return value;
|
60 |
} |
61 |
|
62 |
static void qapi_dealloc_start_struct(Visitor *v, void **obj, const char *kind, |
63 |
const char *name, size_t unused, |
64 |
Error **errp) |
65 |
{ |
66 |
QapiDeallocVisitor *qov = to_qov(v); |
67 |
qapi_dealloc_push(qov, obj); |
68 |
} |
69 |
|
70 |
static 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 |
|
79 |
static void qapi_dealloc_start_list(Visitor *v, const char *name, Error **errp) |
80 |
{ |
81 |
QapiDeallocVisitor *qov = to_qov(v); |
82 |
qapi_dealloc_push(qov, NULL);
|
83 |
} |
84 |
|
85 |
static GenericList *qapi_dealloc_next_list(Visitor *v, GenericList **listp,
|
86 |
Error **errp) |
87 |
{ |
88 |
GenericList *list = *listp; |
89 |
QapiDeallocVisitor *qov = to_qov(v); |
90 |
StackEntry *e = QTAILQ_FIRST(&qov->stack); |
91 |
|
92 |
if (e && e->is_list_head) {
|
93 |
e->is_list_head = false;
|
94 |
return list;
|
95 |
} |
96 |
|
97 |
if (list) {
|
98 |
list = list->next; |
99 |
g_free(*listp); |
100 |
return list;
|
101 |
} |
102 |
|
103 |
return NULL; |
104 |
} |
105 |
|
106 |
static void qapi_dealloc_end_list(Visitor *v, Error **errp) |
107 |
{ |
108 |
QapiDeallocVisitor *qov = to_qov(v); |
109 |
void *obj = qapi_dealloc_pop(qov);
|
110 |
assert(obj == NULL); /* should've been list head tracker with no payload */ |
111 |
} |
112 |
|
113 |
static void qapi_dealloc_type_str(Visitor *v, char **obj, const char *name, |
114 |
Error **errp) |
115 |
{ |
116 |
if (obj) {
|
117 |
g_free(*obj); |
118 |
} |
119 |
} |
120 |
|
121 |
static void qapi_dealloc_type_int(Visitor *v, int64_t *obj, const char *name, |
122 |
Error **errp) |
123 |
{ |
124 |
} |
125 |
|
126 |
static void qapi_dealloc_type_bool(Visitor *v, bool *obj, const char *name, |
127 |
Error **errp) |
128 |
{ |
129 |
} |
130 |
|
131 |
static void qapi_dealloc_type_number(Visitor *v, double *obj, const char *name, |
132 |
Error **errp) |
133 |
{ |
134 |
} |
135 |
|
136 |
static void qapi_dealloc_type_size(Visitor *v, uint64_t *obj, const char *name, |
137 |
Error **errp) |
138 |
{ |
139 |
} |
140 |
|
141 |
static void qapi_dealloc_type_enum(Visitor *v, int *obj, const char *strings[], |
142 |
const char *kind, const char *name, |
143 |
Error **errp) |
144 |
{ |
145 |
} |
146 |
|
147 |
Visitor *qapi_dealloc_get_visitor(QapiDeallocVisitor *v) |
148 |
{ |
149 |
return &v->visitor;
|
150 |
} |
151 |
|
152 |
void qapi_dealloc_visitor_cleanup(QapiDeallocVisitor *v)
|
153 |
{ |
154 |
g_free(v); |
155 |
} |
156 |
|
157 |
QapiDeallocVisitor *qapi_dealloc_visitor_new(void)
|
158 |
{ |
159 |
QapiDeallocVisitor *v; |
160 |
|
161 |
v = g_malloc0(sizeof(*v));
|
162 |
|
163 |
v->visitor.start_struct = qapi_dealloc_start_struct; |
164 |
v->visitor.end_struct = qapi_dealloc_end_struct; |
165 |
v->visitor.start_list = qapi_dealloc_start_list; |
166 |
v->visitor.next_list = qapi_dealloc_next_list; |
167 |
v->visitor.end_list = qapi_dealloc_end_list; |
168 |
v->visitor.type_enum = qapi_dealloc_type_enum; |
169 |
v->visitor.type_int = qapi_dealloc_type_int; |
170 |
v->visitor.type_bool = qapi_dealloc_type_bool; |
171 |
v->visitor.type_str = qapi_dealloc_type_str; |
172 |
v->visitor.type_number = qapi_dealloc_type_number; |
173 |
v->visitor.type_size = qapi_dealloc_type_size; |
174 |
|
175 |
QTAILQ_INIT(&v->stack); |
176 |
|
177 |
return v;
|
178 |
} |