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 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