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 * $FreeBSD$ 29 */ 30 31 #define ALLOC_OBJ(to, type_magic) \ 32 do { \ 33 (to) = calloc(1, sizeof *(to)); \ 34 if ((to) != NULL) \ 35 (to)->magic = (type_magic); \ 36 } while (0) 37 38 #define FREE_OBJ(to) \ 39 do { \ 40 (to)->magic = (0); \ 41 free(to); \ 42 } while (0) 43 44 #define VALID_OBJ(ptr, type_magic) \ 45 ((ptr) != NULL && (ptr)->magic == (type_magic)) 46 47 #define CHECK_OBJ(ptr, type_magic) \ 48 do { \ 49 assert((ptr)->magic == type_magic); \ 50 } while (0) 51 52 #define CHECK_OBJ_NOTNULL(ptr, type_magic) \ 53 do { \ 54 assert((ptr) != NULL); \ 55 assert((ptr)->magic == type_magic); \ 56 } while (0) 57 58 #define CHECK_OBJ_ORNULL(ptr, type_magic) \ 59 do { \ 60 if ((ptr) != NULL) \ 61 assert((ptr)->magic == type_magic); \ 62 } while (0) 63 64 #define CAST_OBJ(to, from, type_magic) \ 65 do { \ 66 (to) = (from); \ 67 if ((to) != NULL) \ 68 CHECK_OBJ((to), (type_magic)); \ 69 } while (0) 70 71 #define CAST_OBJ_NOTNULL(to, from, type_magic) \ 72 do { \ 73 (to) = (from); \ 74 assert((to) != NULL); \ 75 CHECK_OBJ((to), (type_magic)); \ 76 } while (0) 77