1/*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2005-2008 Poul-Henning Kamp
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#define ALLOC_OBJ(to, type_magic)					\
30	do {								\
31		(to) = calloc(1, sizeof *(to));				\
32		if ((to) != NULL)					\
33			(to)->magic = (type_magic);			\
34	} while (0)
35
36#define FREE_OBJ(to)							\
37	do {								\
38		(to)->magic = (0);					\
39		free(to);						\
40	} while (0)
41
42#define VALID_OBJ(ptr, type_magic)					\
43	((ptr) != NULL && (ptr)->magic == (type_magic))
44
45#define CHECK_OBJ(ptr, type_magic)					\
46	do {								\
47		assert((ptr)->magic == type_magic);			\
48	} while (0)
49
50#define CHECK_OBJ_NOTNULL(ptr, type_magic)				\
51	do {								\
52		assert((ptr) != NULL);					\
53		assert((ptr)->magic == type_magic);			\
54	} while (0)
55
56#define CHECK_OBJ_ORNULL(ptr, type_magic)				\
57	do {								\
58		if ((ptr) != NULL)					\
59			assert((ptr)->magic == type_magic);		\
60	} while (0)
61
62#define CAST_OBJ(to, from, type_magic)					\
63	do {								\
64		(to) = (from);						\
65		if ((to) != NULL)					\
66			CHECK_OBJ((to), (type_magic));			\
67	} while (0)
68
69#define CAST_OBJ_NOTNULL(to, from, type_magic)				\
70	do {								\
71		(to) = (from);						\
72		assert((to) != NULL);					\
73		CHECK_OBJ((to), (type_magic));				\
74	} while (0)
75