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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 | ||
43 | #define makedevice(maj,min) makedev(maj,min) | |
44 | #define _sysconf(a) sysconf(a) | |
45 | #define __NORETURN __attribute__ ((noreturn)) | |
46 | ||
47 | /* | |
48 | * Compatibility macros/typedefs needed for Solaris -> Linux port | |
49 | */ | |
50 | #define P2ALIGN(x, align) ((x) & -(align)) | |
51 | #define P2CROSS(x, y, align) (((x) ^ (y)) > (align) - 1) | |
52 | #define P2ROUNDUP(x, align) (-(-(x) & -(align))) | |
53 | #define P2ROUNDUP_TYPED(x, align, type) \ | |
54 | (-(-(type)(x) & -(type)(align))) | |
55 | #define P2BOUNDARY(off, len, align) \ | |
56 | (((off) ^ ((off) + (len) - 1)) > (align) - 1) | |
57 | #define P2PHASE(x, align) ((x) & ((align) - 1)) | |
58 | #define P2NPHASE(x, align) (-(x) & ((align) - 1)) | |
59 | #define P2NPHASE_TYPED(x, align, type) \ | |
60 | (-(type)(x) & ((type)(align) - 1)) | |
61 | #define ISP2(x) (((x) & ((x) - 1)) == 0) | |
62 | #define IS_P2ALIGNED(v, a) ((((uintptr_t)(v)) & ((uintptr_t)(a) - 1)) == 0) | |
63 | ||
64 | /* | |
65 | * Typed version of the P2* macros. These macros should be used to ensure | |
66 | * that the result is correctly calculated based on the data type of (x), | |
67 | * which is passed in as the last argument, regardless of the data | |
68 | * type of the alignment. For example, if (x) is of type uint64_t, | |
69 | * and we want to round it up to a page boundary using "PAGESIZE" as | |
70 | * the alignment, we can do either | |
71 | * P2ROUNDUP(x, (uint64_t)PAGESIZE) | |
72 | * or | |
73 | * P2ROUNDUP_TYPED(x, PAGESIZE, uint64_t) | |
74 | */ | |
75 | #define P2ALIGN_TYPED(x, align, type) \ | |
76 | ((type)(x) & -(type)(align)) | |
77 | #define P2PHASE_TYPED(x, align, type) \ | |
78 | ((type)(x) & ((type)(align) - 1)) | |
79 | #define P2NPHASE_TYPED(x, align, type) \ | |
80 | (-(type)(x) & ((type)(align) - 1)) | |
81 | #define P2ROUNDUP_TYPED(x, align, type) \ | |
82 | (-(-(type)(x) & -(type)(align))) | |
83 | #define P2END_TYPED(x, align, type) \ | |
84 | (-(~(type)(x) & -(type)(align))) | |
85 | #define P2PHASEUP_TYPED(x, align, phase, type) \ | |
86 | ((type)(phase) - (((type)(phase) - (type)(x)) & -(type)(align))) | |
87 | #define P2CROSS_TYPED(x, y, align, type) \ | |
88 | (((type)(x) ^ (type)(y)) > (type)(align) - 1) | |
89 | #define P2SAMEHIGHBIT_TYPED(x, y, type) \ | |
90 | (((type)(x) ^ (type)(y)) < ((type)(x) & (type)(y))) | |
91 | ||
92 | ||
93 | /* avoid any possibility of clashing with <stddef.h> version */ | |
94 | #if defined(_KERNEL) && !defined(_KMEMUSER) && !defined(offsetof) | |
95 | #define offsetof(s, m) ((size_t)(&(((s *)0)->m))) | |
96 | #endif | |
97 | ||
98 | #endif /* _LIBSPL_SYS_SYSMACROS_H */ |