qint.c

   1 /*
   2  * QInt data type.
   3  *
   4  * Copyright (C) 2009 Red Hat Inc.
   5  *
   6  * Authors:
   7  *  Luiz Capitulino <lcapitulino@redhat.com>
   8  *
   9  * This work is licensed under the terms of the GNU GPL, version 2.  See
  10  * the COPYING file in the top-level directory.
  11  */
  12 #include "qint.h"
  13 #include "qobject.h"
  14 #include "qemu-common.h"
  15
  16 static void qint_destroy_obj(QObject *obj);
  17
  18 static const QType qint_type = {
  19     .code = QTYPE_QINT,
  20     .destroy = qint_destroy_obj,
  21 };
  22
  23 /**
  24  * qint_from_int(): Create a new QInt from an int64_t
  25  *
  26  * Return strong reference.
  27  */
  28 QInt *qint_from_int(int64_t value)
  29 {
  30     QInt *qi;
  31
  32     qi = qemu_malloc(sizeof(*qi));
  33     qi->value = value;
  34     QOBJECT_INIT(qi, &qint_type);
  35
  36     return qi;
  37 }
  38
  39 /**
  40  * qint_get_int(): Get the stored integer
  41  */
  42 int64_t qint_get_int(const QInt *qi)
  43 {
  44     return qi->value;
  45 }
  46
  47 /**
  48  * qobject_to_qint(): Convert a QObject into a QInt
  49  */
  50 QInt *qobject_to_qint(const QObject *obj)
  51 {
  52     if (qobject_type(obj) != QTYPE_QINT)
  53         return NULL;
  54
  55     return container_of(obj, QInt, base);
  56 }
  57
  58 /**
  59  * qint_destroy_obj(): Free all memory allocated by a
  60  * QInt object
  61  */
  62 static void qint_destroy_obj(QObject *obj)
  63 {
  64     assert(obj != NULL);
  65     qemu_free(qobject_to_qint(obj));
  66 }