| /* |
| * CDDL HEADER START |
| * |
| * The contents of this file are subject to the terms of the |
| * Common Development and Distribution License, Version 1.0 only |
| * (the "License"). You may not use this file except in compliance |
| * with the License. |
| * |
| * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE |
| * or http://www.opensolaris.org/os/licensing. |
| * See the License for the specific language governing permissions |
| * and limitations under the License. |
| * |
| * When distributing Covered Code, include this CDDL HEADER in each |
| * file and include the License file at usr/src/OPENSOLARIS.LICENSE. |
| * If applicable, add the following below this CDDL HEADER, with the |
| * fields enclosed by brackets "[]" replaced with your own identifying |
| * information: Portions Copyright [yyyy] [name of copyright owner] |
| * |
| * CDDL HEADER END |
| */ |
| /* |
| * Copyright 2007 Sun Microsystems, Inc. All rights reserved. |
| * Use is subject to license terms. |
| */ |
| |
| #ifndef _LIBSPL_SYS_SYSMACROS_H |
| #define _LIBSPL_SYS_SYSMACROS_H |
| |
| #include_next <sys/sysmacros.h> |
| |
| /* common macros */ |
| #ifndef MIN |
| #define MIN(a, b) ((a) < (b) ? (a) : (b)) |
| #endif |
| #ifndef MAX |
| #define MAX(a, b) ((a) < (b) ? (b) : (a)) |
| #endif |
| #ifndef ABS |
| #define ABS(a) ((a) < 0 ? -(a) : (a)) |
| #endif |
| #ifndef ARRAY_SIZE |
| #define ARRAY_SIZE(a) (sizeof (a) / sizeof (a[0])) |
| #endif |
| #ifndef DIV_ROUND_UP |
| #define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d)) |
| #endif |
| |
| #define makedevice(maj, min) makedev(maj, min) |
| #define _sysconf(a) sysconf(a) |
| |
| /* |
| * Compatibility macros/typedefs needed for Solaris -> Linux port |
| */ |
| #define P2ALIGN(x, align) ((x) & -(align)) |
| #define P2CROSS(x, y, align) (((x) ^ (y)) > (align) - 1) |
| #define P2ROUNDUP(x, align) ((((x) - 1) | ((align) - 1)) + 1) |
| #define P2BOUNDARY(off, len, align) \ |
| (((off) ^ ((off) + (len) - 1)) > (align) - 1) |
| #define P2PHASE(x, align) ((x) & ((align) - 1)) |
| #define P2NPHASE(x, align) (-(x) & ((align) - 1)) |
| #define P2NPHASE_TYPED(x, align, type) \ |
| (-(type)(x) & ((type)(align) - 1)) |
| #define ISP2(x) (((x) & ((x) - 1)) == 0) |
| #define IS_P2ALIGNED(v, a) ((((uintptr_t)(v)) & ((uintptr_t)(a) - 1)) == 0) |
| |
| /* |
| * Typed version of the P2* macros. These macros should be used to ensure |
| * that the result is correctly calculated based on the data type of (x), |
| * which is passed in as the last argument, regardless of the data |
| * type of the alignment. For example, if (x) is of type uint64_t, |
| * and we want to round it up to a page boundary using "PAGESIZE" as |
| * the alignment, we can do either |
| * P2ROUNDUP(x, (uint64_t)PAGESIZE) |
| * or |
| * P2ROUNDUP_TYPED(x, PAGESIZE, uint64_t) |
| */ |
| #define P2ALIGN_TYPED(x, align, type) \ |
| ((type)(x) & -(type)(align)) |
| #define P2PHASE_TYPED(x, align, type) \ |
| ((type)(x) & ((type)(align) - 1)) |
| #define P2NPHASE_TYPED(x, align, type) \ |
| (-(type)(x) & ((type)(align) - 1)) |
| #define P2ROUNDUP_TYPED(x, align, type) \ |
| ((((type)(x) - 1) | ((type)(align) - 1)) + 1) |
| #define P2END_TYPED(x, align, type) \ |
| (-(~(type)(x) & -(type)(align))) |
| #define P2PHASEUP_TYPED(x, align, phase, type) \ |
| ((type)(phase) - (((type)(phase) - (type)(x)) & -(type)(align))) |
| #define P2CROSS_TYPED(x, y, align, type) \ |
| (((type)(x) ^ (type)(y)) > (type)(align) - 1) |
| #define P2SAMEHIGHBIT_TYPED(x, y, type) \ |
| (((type)(x) ^ (type)(y)) < ((type)(x) & (type)(y))) |
| |
| |
| /* avoid any possibility of clashing with <stddef.h> version */ |
| #if defined(_KERNEL) && !defined(_KMEMUSER) && !defined(offsetof) |
| #define offsetof(s, m) ((size_t)(&(((s *)0)->m))) |
| #endif |
| |
| #define _NOTE(x) |
| |
| #endif /* _LIBSPL_SYS_SYSMACROS_H */ |