miniobj.h revision 306910 
1/*-
2 * Copyright (c) 2005-2008 Poul-Henning Kamp
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: stable/10/usr.sbin/fifolog/lib/miniobj.h 306910 2016-10-09 19:58:27Z pfg $
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