1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #ifndef _LIBSPL_SYS_SYSMACROS_H 28 #define _LIBSPL_SYS_SYSMACROS_H 29 30 #include_next <sys/sysmacros.h> 31 32 /* common macros */ 33 #ifndef MIN 34 #define MIN(a, b) ((a) < (b) ? (a) : (b)) 35 #endif 36 #ifndef MAX 37 #define MAX(a, b) ((a) < (b) ? (b) : (a)) 38 #endif 39 #ifndef ABS 40 #define ABS(a) ((a) < 0 ? -(a) : (a)) 41 #endif 42 #ifndef ARRAY_SIZE 43 #define ARRAY_SIZE(a) (sizeof (a) / sizeof (a[0])) 44 #endif 45 #ifndef DIV_ROUND_UP 46 #define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d)) 47 #endif 48 49 #define makedevice(maj, min) makedev(maj, min) 50 #define _sysconf(a) sysconf(a) 51 52 /* 53 * Compatibility macros/typedefs needed for Solaris -> Linux port 54 */ 55 #define P2ALIGN(x, align) ((x) & -(align)) 56 #define P2CROSS(x, y, align) (((x) ^ (y)) > (align) - 1) 57 #define P2ROUNDUP(x, align) ((((x) - 1) | ((align) - 1)) + 1) 58 #define P2BOUNDARY(off, len, align) \ 59 (((off) ^ ((off) + (len) - 1)) > (align) - 1) 60 #define P2PHASE(x, align) ((x) & ((align) - 1)) 61 #define P2NPHASE(x, align) (-(x) & ((align) - 1)) 62 #define P2NPHASE_TYPED(x, align, type) \ 63 (-(type)(x) & ((type)(align) - 1)) 64 #define ISP2(x) (((x) & ((x) - 1)) == 0) 65 #define IS_P2ALIGNED(v, a) ((((uintptr_t)(v)) & ((uintptr_t)(a) - 1)) == 0) 66 67 /* 68 * Typed version of the P2* macros. These macros should be used to ensure 69 * that the result is correctly calculated based on the data type of (x), 70 * which is passed in as the last argument, regardless of the data 71 * type of the alignment. For example, if (x) is of type uint64_t, 72 * and we want to round it up to a page boundary using "PAGESIZE" as 73 * the alignment, we can do either 74 * P2ROUNDUP(x, (uint64_t)PAGESIZE) 75 * or 76 * P2ROUNDUP_TYPED(x, PAGESIZE, uint64_t) 77 */ 78 #define P2ALIGN_TYPED(x, align, type) \ 79 ((type)(x) & -(type)(align)) 80 #define P2PHASE_TYPED(x, align, type) \ 81 ((type)(x) & ((type)(align) - 1)) 82 #define P2NPHASE_TYPED(x, align, type) \ 83 (-(type)(x) & ((type)(align) - 1)) 84 #define P2ROUNDUP_TYPED(x, align, type) \ 85 ((((type)(x) - 1) | ((type)(align) - 1)) + 1) 86 #define P2END_TYPED(x, align, type) \ 87 (-(~(type)(x) & -(type)(align))) 88 #define P2PHASEUP_TYPED(x, align, phase, type) \ 89 ((type)(phase) - (((type)(phase) - (type)(x)) & -(type)(align))) 90 #define P2CROSS_TYPED(x, y, align, type) \ 91 (((type)(x) ^ (type)(y)) > (type)(align) - 1) 92 #define P2SAMEHIGHBIT_TYPED(x, y, type) \ 93 (((type)(x) ^ (type)(y)) < ((type)(x) & (type)(y))) 94 95 96 /* avoid any possibility of clashing with <stddef.h> version */ 97 #if defined(_KERNEL) && !defined(_KMEMUSER) && !defined(offsetof) 98 #define offsetof(s, m) ((size_t)(&(((s *)0)->m))) 99 #endif 100 101 #endif /* _LIBSPL_SYS_SYSMACROS_H */ 102