unicorn/qemu/qobject/qbool.c
Markus Armbruster 41ca5bddb8
qbool: Make conversion from QObject * accept null
qobject_to_qbool() crashes on null, which is a trap for the unwary.
Return null instead, and simplify a few callers.

Backports commit 14b6160099f0caf5dc9d62e637b007bc5d719a96 from qemu
2018-02-17 15:24:11 -05:00

69 lines
1.2 KiB
C

/*
* QBool Module
*
* Copyright IBM, Corp. 2009
*
* Authors:
* Anthony Liguori <aliguori@us.ibm.com>
*
* This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
* See the COPYING.LIB file in the top-level directory.
*
*/
#include "qapi/qmp/qbool.h"
#include "qapi/qmp/qobject.h"
#include "qemu-common.h"
static void qbool_destroy_obj(QObject *obj);
static const QType qbool_type = {
QTYPE_QBOOL,
qbool_destroy_obj,
};
/**
* qbool_from_bool(): Create a new QBool from a bool
*
* Return strong reference.
*/
QBool *qbool_from_bool(bool value)
{
QBool *qb;
qb = g_malloc(sizeof(*qb));
qb->value = value;
QOBJECT_INIT(qb, &qbool_type);
return qb;
}
/**
* qbool_get_bool(): Get the stored bool
*/
bool qbool_get_bool(const QBool *qb)
{
return qb->value;
}
/**
* qobject_to_qbool(): Convert a QObject into a QBool
*/
QBool *qobject_to_qbool(const QObject *obj)
{
if (!obj || qobject_type(obj) != QTYPE_QBOOL) {
return NULL;
}
return container_of(obj, QBool, base);
}
/**
* qbool_destroy_obj(): Free all memory allocated by a
* QBool object
*/
static void qbool_destroy_obj(QObject *obj)
{
assert(obj != NULL);
g_free(qobject_to_qbool(obj));
}