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44855d773b
Peek what systemd does and do something similar. Instead of hardcoding 8, add a ptr abstraction for the aligned attribute. Signed-off-by: Lucas De Marchi <lucas.de.marchi@gmail.com> Link: https://github.com/kmod-project/kmod/pull/274
82 lines
2.6 KiB
C
82 lines
2.6 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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/*
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* Copyright (C) 2011-2013 ProFUSION embedded systems
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*/
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#pragma once
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#include <stddef.h>
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#if defined(HAVE_STATIC_ASSERT)
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#define assert_cc(expr) _Static_assert((expr), #expr)
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#else
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#define assert_cc(expr) \
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do { \
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(void)sizeof(char[1 - 2 * !(expr)]); \
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} while (0)
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#endif
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#define check_types_match(expr1, expr2) ((typeof(expr1) *)0 != (typeof(expr2) *)0)
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#define container_of(member_ptr, containing_type, member) \
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((containing_type *)((char *)(member_ptr) - offsetof(containing_type, member)) - \
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check_types_match(*(member_ptr), ((containing_type *)0)->member))
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/* Two gcc extensions.
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* &a[0] degrades to a pointer: a different type from an array */
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#define _array_size_chk(arr) \
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({ \
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assert_cc(!__builtin_types_compatible_p(typeof(arr), typeof(&(arr)[0]))); \
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0; \
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})
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#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + _array_size_chk(arr))
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#define XSTRINGIFY(x) #x
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#define STRINGIFY(x) XSTRINGIFY(x)
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#define XCONCATENATE(x, y) x##y
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#define CONCATENATE(x, y) XCONCATENATE(x, y)
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#define UNIQ(x) CONCATENATE(x, __COUNTER__)
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#define UNIQ_T(x, uniq) CONCATENATE(__unique_prefix_, CONCATENATE(x, uniq))
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/* Attributes */
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#define _must_check_ __attribute__((warn_unused_result))
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#define _printf_format_(a, b) __attribute__((format(printf, a, b)))
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#define _always_inline_ __inline__ __attribute__((always_inline))
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#define _sentinel_ __attribute__((sentinel))
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#define _used_ __attribute((used))
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#define _retain_ __attribute((retain))
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#define _section_(a) __attribute((section(a)))
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#define _aligned_(a) __attribute((aligned(a)))
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#define _alignedptr_ _aligned_(sizeof(void *))
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#if defined(__clang_analyzer__)
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#define _clang_suppress_ __attribute__((suppress))
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#define _clang_suppress_alloc_ __attribute__((suppress))
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#else
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#define _clang_suppress_
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#define _clang_suppress_alloc_
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#endif
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#define _nonnull_(...) __attribute__((nonnull(__VA_ARGS__)))
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#define _nonnull_all_ __attribute__((nonnull))
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#define _cleanup_(x) _clang_suppress_alloc_ __attribute__((cleanup(x)))
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static inline void freep(void *p)
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{
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free(*(void **)p);
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}
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#define _cleanup_free_ _cleanup_(freep)
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/* Define C11 noreturn without <stdnoreturn.h> and even on older gcc
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* compiler versions */
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#ifndef noreturn
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#if defined(HAVE_NORETURN)
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#define noreturn _Noreturn
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#else
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#define noreturn __attribute__((noreturn))
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#endif
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#endif
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