LXR qemu/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
  19typedef struct StackEntry
  20{
  21    void *value;
  22    QTAILQ_ENTRY(StackEntry) node;
  23} StackEntry;
  24
  25struct QapiDeallocVisitor
  26{
  27    Visitor visitor;
  28    QTAILQ_HEAD(, StackEntry) stack;
  29};
  30
  31static QapiDeallocVisitor *to_qov(Visitor *v)
  32{
  33    return container_of(v, QapiDeallocVisitor, visitor);
  34}
  35
  36static void qapi_dealloc_push(QapiDeallocVisitor *qov, void *value)
  37{
  38    StackEntry *e = qemu_mallocz(sizeof(*e));
  39
  40    e->value = value;
  41    QTAILQ_INSERT_HEAD(&qov->stack, e, node);
  42}
  43
  44static void *qapi_dealloc_pop(QapiDeallocVisitor *qov)
  45{
  46    StackEntry *e = QTAILQ_FIRST(&qov->stack);
  47    QObject *value;
  48    QTAILQ_REMOVE(&qov->stack, e, node);
  49    value = e->value;
  50    qemu_free(e);
  51    return value;
  52}
  53
  54static void qapi_dealloc_start_struct(Visitor *v, void **obj, const char *kind,
  55                                      const char *name, size_t unused,
  56                                      Error **errp)
  57{
  58    QapiDeallocVisitor *qov = to_qov(v);
  59    qapi_dealloc_push(qov, obj);
  60}
  61
  62static void qapi_dealloc_end_struct(Visitor *v, Error **errp)
  63{
  64    QapiDeallocVisitor *qov = to_qov(v);
  65    void **obj = qapi_dealloc_pop(qov);
  66    if (obj) {
  67        qemu_free(*obj);
  68    }
  69}
  70
  71static void qapi_dealloc_start_list(Visitor *v, const char *name, Error **errp)
  72{
  73}
  74
  75static GenericList *qapi_dealloc_next_list(Visitor *v, GenericList **list,
  76                                           Error **errp)
  77{
  78    GenericList *retval = *list;
  79    qemu_free(retval->value);
  80    *list = retval->next;
  81    return retval;
  82}
  83
  84static void qapi_dealloc_end_list(Visitor *v, Error **errp)
  85{
  86}
  87
  88static void qapi_dealloc_type_str(Visitor *v, char **obj, const char *name,
  89                                  Error **errp)
  90{
  91    if (obj) {
  92        qemu_free(*obj);
  93    }
  94}
  95
  96static void qapi_dealloc_type_int(Visitor *v, int64_t *obj, const char *name,
  97                                  Error **errp)
  98{
  99}
 100
 101static void qapi_dealloc_type_bool(Visitor *v, bool *obj, const char *name,
 102                                   Error **errp)
 103{
 104}
 105
 106static void qapi_dealloc_type_number(Visitor *v, double *obj, const char *name,
 107                                     Error **errp)
 108{
 109}
 110
 111static void qapi_dealloc_type_enum(Visitor *v, int *obj, const char *strings[],
 112                                   const char *kind, const char *name,
 113                                   Error **errp)
 114{
 115}
 116
 117Visitor *qapi_dealloc_get_visitor(QapiDeallocVisitor *v)
 118{
 119    return &v->visitor;
 120}
 121
 122void qapi_dealloc_visitor_cleanup(QapiDeallocVisitor *v)
 123{
 124    qemu_free(v);
 125}
 126
 127QapiDeallocVisitor *qapi_dealloc_visitor_new(void)
 128{
 129    QapiDeallocVisitor *v;
 130
 131    v = qemu_mallocz(sizeof(*v));
 132
 133    v->visitor.start_struct = qapi_dealloc_start_struct;
 134    v->visitor.end_struct = qapi_dealloc_end_struct;
 135    v->visitor.start_list = qapi_dealloc_start_list;
 136    v->visitor.next_list = qapi_dealloc_next_list;
 137    v->visitor.end_list = qapi_dealloc_end_list;
 138    v->visitor.type_enum = qapi_dealloc_type_enum;
 139    v->visitor.type_int = qapi_dealloc_type_int;
 140    v->visitor.type_bool = qapi_dealloc_type_bool;
 141    v->visitor.type_str = qapi_dealloc_type_str;
 142    v->visitor.type_number = qapi_dealloc_type_number;
 143
 144    QTAILQ_INIT(&v->stack);
 145
 146    return v;
 147}
 148