virtio-balloon: add 'available' counter
[qemu/cris-port.git] / qapi / qapi-dealloc-visitor.c
blob69221794ec34f4b603d62bbe6eef334e01bad3c9
1 /*
2 * Dealloc Visitor
4 * Copyright (C) 2012-2016 Red Hat, Inc.
5 * Copyright IBM, Corp. 2011
7 * Authors:
8 * Michael Roth <mdroth@linux.vnet.ibm.com>
10 * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
11 * See the COPYING.LIB file in the top-level directory.
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"
22 typedef struct StackEntry
24 void *value;
25 bool is_list_head;
26 QTAILQ_ENTRY(StackEntry) node;
27 } StackEntry;
29 struct QapiDeallocVisitor
31 Visitor visitor;
32 QTAILQ_HEAD(, StackEntry) stack;
35 static QapiDeallocVisitor *to_qov(Visitor *v)
37 return container_of(v, QapiDeallocVisitor, visitor);
40 static void qapi_dealloc_push(QapiDeallocVisitor *qov, void *value)
42 StackEntry *e = g_malloc0(sizeof(*e));
44 e->value = value;
46 /* see if we're just pushing a list head tracker */
47 if (value == NULL) {
48 e->is_list_head = true;
50 QTAILQ_INSERT_HEAD(&qov->stack, e, node);
53 static void *qapi_dealloc_pop(QapiDeallocVisitor *qov)
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;
63 static void qapi_dealloc_start_struct(Visitor *v, const char *name, void **obj,
64 size_t unused, Error **errp)
66 QapiDeallocVisitor *qov = to_qov(v);
67 qapi_dealloc_push(qov, obj);
70 static void qapi_dealloc_end_struct(Visitor *v, Error **errp)
72 QapiDeallocVisitor *qov = to_qov(v);
73 void **obj = qapi_dealloc_pop(qov);
74 if (obj) {
75 g_free(*obj);
79 static void qapi_dealloc_start_alternate(Visitor *v, const char *name,
80 GenericAlternate **obj, size_t size,
81 bool promote_int, Error **errp)
83 QapiDeallocVisitor *qov = to_qov(v);
84 qapi_dealloc_push(qov, obj);
87 static void qapi_dealloc_end_alternate(Visitor *v)
89 QapiDeallocVisitor *qov = to_qov(v);
90 void **obj = qapi_dealloc_pop(qov);
91 if (obj) {
92 g_free(*obj);
96 static void qapi_dealloc_start_list(Visitor *v, const char *name, Error **errp)
98 QapiDeallocVisitor *qov = to_qov(v);
99 qapi_dealloc_push(qov, NULL);
102 static GenericList *qapi_dealloc_next_list(Visitor *v, GenericList **listp,
103 size_t size)
105 GenericList *list = *listp;
106 QapiDeallocVisitor *qov = to_qov(v);
107 StackEntry *e = QTAILQ_FIRST(&qov->stack);
109 if (e && e->is_list_head) {
110 e->is_list_head = false;
111 return list;
114 if (list) {
115 list = list->next;
116 g_free(*listp);
117 return list;
120 return NULL;
123 static void qapi_dealloc_end_list(Visitor *v)
125 QapiDeallocVisitor *qov = to_qov(v);
126 void *obj = qapi_dealloc_pop(qov);
127 assert(obj == NULL); /* should've been list head tracker with no payload */
130 static void qapi_dealloc_type_str(Visitor *v, const char *name, char **obj,
131 Error **errp)
133 if (obj) {
134 g_free(*obj);
138 static void qapi_dealloc_type_int64(Visitor *v, const char *name, int64_t *obj,
139 Error **errp)
143 static void qapi_dealloc_type_uint64(Visitor *v, const char *name,
144 uint64_t *obj, Error **errp)
148 static void qapi_dealloc_type_bool(Visitor *v, const char *name, bool *obj,
149 Error **errp)
153 static void qapi_dealloc_type_number(Visitor *v, const char *name, double *obj,
154 Error **errp)
158 static void qapi_dealloc_type_anything(Visitor *v, const char *name,
159 QObject **obj, Error **errp)
161 if (obj) {
162 qobject_decref(*obj);
166 static void qapi_dealloc_type_enum(Visitor *v, const char *name, int *obj,
167 const char * const strings[], Error **errp)
171 Visitor *qapi_dealloc_get_visitor(QapiDeallocVisitor *v)
173 return &v->visitor;
176 void qapi_dealloc_visitor_cleanup(QapiDeallocVisitor *v)
178 g_free(v);
181 QapiDeallocVisitor *qapi_dealloc_visitor_new(void)
183 QapiDeallocVisitor *v;
185 v = g_malloc0(sizeof(*v));
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;
202 QTAILQ_INIT(&v->stack);
204 return v;