75 lines
2.4 KiB
C
75 lines
2.4 KiB
C
/*-
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* Copyright (c) 2005-2008 Poul-Henning Kamp
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#define ALLOC_OBJ(to, type_magic) \
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do { \
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(to) = calloc(sizeof *(to), 1); \
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if ((to) != NULL) \
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(to)->magic = (type_magic); \
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} while (0)
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#define FREE_OBJ(to) \
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do { \
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(to)->magic = (0); \
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free(to); \
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} while (0)
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#define VALID_OBJ(ptr, type_magic) \
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((ptr) != NULL && (ptr)->magic == (type_magic))
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#define CHECK_OBJ(ptr, type_magic) \
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do { \
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assert((ptr)->magic == type_magic); \
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} while (0)
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#define CHECK_OBJ_NOTNULL(ptr, type_magic) \
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do { \
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assert((ptr) != NULL); \
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assert((ptr)->magic == type_magic); \
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} while (0)
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#define CHECK_OBJ_ORNULL(ptr, type_magic) \
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do { \
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if ((ptr) != NULL) \
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assert((ptr)->magic == type_magic); \
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} while (0)
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#define CAST_OBJ(to, from, type_magic) \
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do { \
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(to) = (from); \
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if ((to) != NULL) \
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CHECK_OBJ((to), (type_magic)); \
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} while (0)
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#define CAST_OBJ_NOTNULL(to, from, type_magic) \
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do { \
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(to) = (from); \
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assert((to) != NULL); \
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CHECK_OBJ((to), (type_magic)); \
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} while (0)
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