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 * $FreeBSD$ 27 */ 28 29 #define ALLOC_OBJ(to, type_magic) \ 30 do { \ 31 (to) = calloc(sizeof *(to), 1); \ 32 assert((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 CHECK_OBJ(ptr, type_magic) \ 43 do { \ 44 assert((ptr)->magic == type_magic); \ 45 } while (0) 46 47 #define CHECK_OBJ_NOTNULL(ptr, type_magic) \ 48 do { \ 49 assert((ptr) != NULL); \ 50 assert((ptr)->magic == type_magic); \ 51 } while (0) 52 53 #define CAST_OBJ(to, from, type_magic) \ 54 do { \ 55 (to) = (from); \ 56 if ((to) != NULL) \ 57 CHECK_OBJ((to), (type_magic)); \ 58 } while (0) 59 60 #define CAST_OBJ_NOTNULL(to, from, type_magic) \ 61 do { \ 62 (to) = (from); \ 63 assert((to) != NULL); \ 64 CHECK_OBJ((to), (type_magic)); \ 65 } while (0) 66 67