qint.c

   1 /*
   2  * QInt Module
   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 LGPL, version 2.1 or later.
  10  * See the COPYING.LIB file in the top-level directory.
  11  */
  12
  13 #include "qint.h"
  14 #include "qobject.h"
  15 #include "qemu-common.h"
  16
  17 static void qint_destroy_obj(QObject *obj);
  18
  19 static const QType qint_type = {
  20     .code = QTYPE_QINT,
  21     .destroy = qint_destroy_obj,
  22 };
  23
  24 /**
  25  * qint_from_int(): Create a new QInt from an int64_t
  26  *
  27  * Return strong reference.
  28  */
  29 QInt *qint_from_int(int64_t value)
  30 {
  31     QInt *qi;
  32
  33     qi = qemu_malloc(sizeof(*qi));
  34     qi->value = value;
  35     QOBJECT_INIT(qi, &qint_type);
  36
  37     return qi;
  38 }
  39
  40 /**
  41  * qint_get_int(): Get the stored integer
  42  */
  43 int64_t qint_get_int(const QInt *qi)
  44 {
  45     return qi->value;
  46 }
  47
  48 /**
  49  * qobject_to_qint(): Convert a QObject into a QInt
  50  */
  51 QInt *qobject_to_qint(const QObject *obj)
  52 {
  53     if (qobject_type(obj) != QTYPE_QINT)
  54         return NULL;
  55
  56     return container_of(obj, QInt, base);
  57 }
  58
  59 /**
  60  * qint_destroy_obj(): Free all memory allocated by a
  61  * QInt object
  62  */
  63 static void qint_destroy_obj(QObject *obj)
  64 {
  65     assert(obj != NULL);
  66     qemu_free(qobject_to_qint(obj));
  67 }