mirror of
https://github.com/RT-Thread/rt-thread.git
synced 2026-06-21 13:52:50 +08:00
wusongjie
179157f4e1
We add the device name and id set api in DM, now driver could set name like sprintf without know how many devices it is. The misc.h and byteorder.h add some macros to developers that they always use in drivers. Signed-off-by: GuEe-GUI <GuEe-GUI@github.com>
87 lines
2.6 KiB
C
87 lines
2.6 KiB
C
/*
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* Copyright (c) 2006-2023, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2023-02-25 GuEe-GUI the first version
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*/
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#ifndef __MISC_H__
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#define __MISC_H__
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#include <rtdef.h>
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#ifdef ARCH_CPU_64BIT
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#define RT_BITS_PER_LONG 64
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#else
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#define RT_BITS_PER_LONG 32
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#endif
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#define RT_BITS_PER_LONG_LONG 64
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#define RT_DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
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#define RT_DIV_ROUND_CLOSEST(x, divisor) \
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({ \
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typeof(x) __x = x; \
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typeof(divisor) __d = divisor; \
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(((typeof(x))-1) > 0 || \
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((typeof(divisor))-1) > 0 || \
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(((__x) > 0) == ((__d) > 0))) ? \
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(((__x) + ((__d) / 2)) / (__d)) : \
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(((__x) - ((__d) / 2)) / (__d)); \
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})
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#define RT_BIT(n) (1UL << (n))
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#define RT_BIT_ULL(n) (1ULL << (n))
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#define RT_BIT_MASK(nr) (1UL << ((nr) % RT_BITS_PER_LONG))
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#define RT_BIT_WORD(nr) ((nr) / RT_BITS_PER_LONG)
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#define RT_BITS_PER_BYTE 8
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#define RT_BITS_PER_TYPE(type) (sizeof(type) * RT_BITS_PER_BYTE)
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#define RT_BITS_TO_BYTES(nr) RT_DIV_ROUND_UP(nr, RT_BITS_PER_TYPE(char))
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#define RT_BITS_TO_LONGS(nr) RT_DIV_ROUND_UP(nr, RT_BITS_PER_TYPE(long))
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#define RT_GENMASK(h, l) (((~0UL) << (l)) & (~0UL >> (RT_BITS_PER_LONG - 1 - (h))))
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#define RT_GENMASK_ULL(h, l) (((~0ULL) << (l)) & (~0ULL >> (RT_BITS_PER_LONG_LONG - 1 - (h))))
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#define RT_ARRAY_SIZE(arr) (sizeof(arr) / sizeof(arr[0]))
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#define rt_min(x, y) \
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({ \
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typeof(x) _x = (x); \
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typeof(y) _y = (y); \
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(void) (&_x == &_y); \
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_x < _y ? _x : _y; \
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})
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#define rt_max(x, y) \
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({ \
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typeof(x) _x = (x); \
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typeof(y) _y = (y); \
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(void) (&_x == &_y); \
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_x > _y ? _x : _y; \
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})
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#define rt_min_t(type, x, y) \
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({ \
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type _x = (x); \
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type _y = (y); \
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_x < _y ? _x: _y; \
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})
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#define rt_clamp(val, lo, hi) rt_min((typeof(val))rt_max(val, lo), hi)
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#define rt_do_div(n, base) \
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({ \
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rt_uint32_t _base = (base), _rem; \
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_rem = ((rt_uint64_t)(n)) % _base; \
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(n) = ((rt_uint64_t)(n)) / _base; \
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if (_rem > _base / 2) \
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++(n); \
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_rem; \
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})
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#endif /* __MISC_H__ */
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