root / qapi / qapi-dealloc-visitor.c @ 80465e80
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/*
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* Dealloc Visitor
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*
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* Copyright IBM, Corp. 2011
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*
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* Authors:
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* Michael Roth <mdroth@linux.vnet.ibm.com>
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*
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* This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
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* See the COPYING.LIB file in the top-level directory.
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*
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*/
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#include "qapi-dealloc-visitor.h" |
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#include "qemu-queue.h" |
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#include "qemu-common.h" |
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#include "qemu-objects.h" |
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typedef struct StackEntry |
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{ |
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void *value;
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bool is_list_head;
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QTAILQ_ENTRY(StackEntry) node; |
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} StackEntry; |
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struct QapiDeallocVisitor
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{ |
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Visitor visitor; |
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QTAILQ_HEAD(, StackEntry) stack; |
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bool is_list_head;
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}; |
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static QapiDeallocVisitor *to_qov(Visitor *v)
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{ |
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return container_of(v, QapiDeallocVisitor, visitor);
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} |
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static void qapi_dealloc_push(QapiDeallocVisitor *qov, void *value) |
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{ |
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StackEntry *e = g_malloc0(sizeof(*e));
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e->value = value; |
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/* see if we're just pushing a list head tracker */
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if (value == NULL) { |
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e->is_list_head = true;
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} |
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QTAILQ_INSERT_HEAD(&qov->stack, e, node); |
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} |
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static void *qapi_dealloc_pop(QapiDeallocVisitor *qov) |
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{ |
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StackEntry *e = QTAILQ_FIRST(&qov->stack); |
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QObject *value; |
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QTAILQ_REMOVE(&qov->stack, e, node); |
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value = e->value; |
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g_free(e); |
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return value;
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} |
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static void qapi_dealloc_start_struct(Visitor *v, void **obj, const char *kind, |
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const char *name, size_t unused, |
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Error **errp) |
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{ |
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QapiDeallocVisitor *qov = to_qov(v); |
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qapi_dealloc_push(qov, obj); |
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} |
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static void qapi_dealloc_end_struct(Visitor *v, Error **errp) |
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{ |
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QapiDeallocVisitor *qov = to_qov(v); |
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void **obj = qapi_dealloc_pop(qov);
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if (obj) {
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g_free(*obj); |
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} |
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} |
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static void qapi_dealloc_start_list(Visitor *v, const char *name, Error **errp) |
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{ |
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QapiDeallocVisitor *qov = to_qov(v); |
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qapi_dealloc_push(qov, NULL);
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} |
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static GenericList *qapi_dealloc_next_list(Visitor *v, GenericList **listp,
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Error **errp) |
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{ |
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GenericList *list = *listp; |
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QapiDeallocVisitor *qov = to_qov(v); |
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StackEntry *e = QTAILQ_FIRST(&qov->stack); |
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if (e && e->is_list_head) {
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e->is_list_head = false;
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return list;
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} |
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if (list) {
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list = list->next; |
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g_free(*listp); |
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return list;
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} |
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return NULL; |
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} |
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static void qapi_dealloc_end_list(Visitor *v, Error **errp) |
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{ |
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QapiDeallocVisitor *qov = to_qov(v); |
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void *obj = qapi_dealloc_pop(qov);
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assert(obj == NULL); /* should've been list head tracker with no payload */ |
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} |
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static void qapi_dealloc_type_str(Visitor *v, char **obj, const char *name, |
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Error **errp) |
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{ |
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if (obj) {
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g_free(*obj); |
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} |
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} |
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static void qapi_dealloc_type_int(Visitor *v, int64_t *obj, const char *name, |
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Error **errp) |
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{ |
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} |
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static void qapi_dealloc_type_bool(Visitor *v, bool *obj, const char *name, |
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Error **errp) |
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{ |
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} |
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static void qapi_dealloc_type_number(Visitor *v, double *obj, const char *name, |
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Error **errp) |
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{ |
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} |
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static void qapi_dealloc_type_enum(Visitor *v, int *obj, const char *strings[], |
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const char *kind, const char *name, |
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Error **errp) |
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{ |
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} |
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Visitor *qapi_dealloc_get_visitor(QapiDeallocVisitor *v) |
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{ |
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return &v->visitor;
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} |
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void qapi_dealloc_visitor_cleanup(QapiDeallocVisitor *v)
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{ |
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g_free(v); |
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} |
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QapiDeallocVisitor *qapi_dealloc_visitor_new(void)
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{ |
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QapiDeallocVisitor *v; |
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v = g_malloc0(sizeof(*v));
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v->visitor.start_struct = qapi_dealloc_start_struct; |
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v->visitor.end_struct = qapi_dealloc_end_struct; |
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v->visitor.start_list = qapi_dealloc_start_list; |
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v->visitor.next_list = qapi_dealloc_next_list; |
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v->visitor.end_list = qapi_dealloc_end_list; |
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v->visitor.type_enum = qapi_dealloc_type_enum; |
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v->visitor.type_int = qapi_dealloc_type_int; |
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v->visitor.type_bool = qapi_dealloc_type_bool; |
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v->visitor.type_str = qapi_dealloc_type_str; |
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v->visitor.type_number = qapi_dealloc_type_number; |
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QTAILQ_INIT(&v->stack); |
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return v;
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} |