57 lines
1.6 KiB
C
57 lines
1.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Definitions of common constant and generic macros of libcryptsetup
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*
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* Copyright (C) 2009-2024 Red Hat, Inc. All rights reserved.
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* Copyright (C) 2009-2024 Milan Broz
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*/
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#ifndef _LIBCRYPTSETUP_MACROS_H
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#define _LIBCRYPTSETUP_MACROS_H
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/* to silent gcc -Wcast-qual for const cast */
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#define CONST_CAST(x) (x)(uintptr_t)
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/* to silent clang -Wcast-align when working with byte arrays */
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#define VOIDP_CAST(x) (x)(void*)
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#define UNUSED(x) (void)(x)
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#ifndef ARRAY_SIZE
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# define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
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#endif
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#define BITFIELD_SIZE(BF_PTR) (sizeof(*(BF_PTR)) * 8)
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#define MOVE_REF(x, y) \
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do { \
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__typeof__(x) *_px = &(x), *_py = &(y); \
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*_px = *_py; \
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*_py = NULL; \
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} while (0)
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#define FREE_AND_NULL(x) do { free(x); x = NULL; } while (0)
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#define AT_LEAST(a, b) ({ __typeof__(a) __at_least = (a); (__at_least >= (b))?__at_least:(b); })
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#define SHIFT_4K 12
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#define SECTOR_SHIFT 9
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#define SECTOR_SIZE (1 << SECTOR_SHIFT)
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#define MAX_SECTOR_SIZE 4096 /* min page size among all platforms */
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#define ROUND_SECTOR(x) (((x) + SECTOR_SIZE - 1) / SECTOR_SIZE)
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#define MISALIGNED(a, b) ((a) & ((b) - 1))
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#define MISALIGNED_4K(a) MISALIGNED((a), 1 << SHIFT_4K)
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#define MISALIGNED_512(a) MISALIGNED((a), 1 << SECTOR_SHIFT)
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#define NOTPOW2(a) MISALIGNED((a), (a))
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#define DEFAULT_DISK_ALIGNMENT 1048576 /* 1MiB */
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#define DEFAULT_MEM_ALIGNMENT 4096
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#define DM_UUID_LEN 129
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#define DM_BY_ID_PREFIX "dm-uuid-"
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#define DM_BY_ID_PREFIX_LEN 8
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#define DM_UUID_PREFIX "CRYPT-"
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#define DM_UUID_PREFIX_LEN 6
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#endif /* _LIBCRYPTSETUP_MACROS_H */
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