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47 lines
1.2 KiB
C
47 lines
1.2 KiB
C
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/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2024 The FreeBSD Foundation
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*
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* This software was developed by Björn Zeeb under sponsorship from
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* the FreeBSD Foundation.
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*/
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#ifndef _LINUXKPI_LINUX_CLEANUP_H
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#define _LINUXKPI_LINUX_CLEANUP_H
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#define __cleanup(_f) __attribute__((__cleanup__(_f)))
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/*
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* Note: "_T" are special as they are exposed into common code for
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* statements. Extra care should be taken when changing the code.
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*/
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#define DEFINE_GUARD(_n, _dt, _lock, _unlock) \
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\
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typedef _dt guard_ ## _n ## _t; \
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\
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static inline _dt \
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guard_ ## _n ## _create( _dt _T) \
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{ \
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_dt c; \
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\
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c = ({ _lock; _T; }); \
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return (c); \
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} \
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\
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static inline void \
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guard_ ## _n ## _destroy(_dt *t) \
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{ \
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_dt _T; \
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\
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_T = *t; \
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if (_T) { _unlock; }; \
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}
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/* We need to keep these calls unique. */
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#define guard(_n) \
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guard_ ## _n ## _t guard_ ## _n ## _ ## __COUNTER__ \
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__cleanup(guard_ ## _n ## _destroy) = guard_ ## _n ## _create
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#endif /* _LINUXKPI_LINUX_CLEANUP_H */
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