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https://github.com/RGBCube/serenity
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69cabb3ead
Add them in `<Kernel/API/Device.h>` and use these to provides
`{makedev,major,minor}` in `<sys/sysmacros.h>`. It aims to be more in
line with other Unix implementations and avoid code duplication in user
land.
30 lines
593 B
C
30 lines
593 B
C
/*
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* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Platform.h>
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#include <sys/cdefs.h>
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#include <sys/types.h>
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__BEGIN_DECLS
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ALWAYS_INLINE dev_t serenity_dev_makedev(unsigned major, unsigned minor)
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{
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return (minor & 0xffu) | (major << 8u) | ((minor & ~0xffu) << 12u);
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}
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ALWAYS_INLINE unsigned int serenity_dev_major(dev_t dev)
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{
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return (dev & 0xfff00u) >> 8u;
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}
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ALWAYS_INLINE unsigned int serenity_dev_minor(dev_t dev)
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{
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return (dev & 0xffu) | ((dev >> 12u) & 0xfff00u);
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}
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__END_DECLS
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