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https://github.com/RGBCube/serenity
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8fe74c7d57
The Kernel/API directory in general shouldn't include userspace code, but structure definitions that both are shared between the Kernel and userspace. LibC is the most appropriate place for these methods as they're already included in the sys/sysmacros.h file to create a set of convenient macros for these methods.
30 lines
614 B
C
30 lines
614 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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static 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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static 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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static 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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