1bff0fadad
Similar to the one used in the Linux kernel. * macros.h (cast_ptr, containerof): New macros. * list.h: New file. * Makefile.am (strace_SOURCES): Add it.
63 lines
1.4 KiB
C
63 lines
1.4 KiB
C
/*
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* Copyright (c) 2001-2018 The strace developers.
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* All rights reserved.
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*
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* SPDX-License-Identifier: LGPL-2.1-or-later
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*/
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#ifndef STRACE_MACROS_H
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# define STRACE_MACROS_H
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# include <stdbool.h>
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# include <sys/types.h>
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# include "gcc_compat.h"
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# define ARRAY_SIZE(a_) (sizeof(a_) / sizeof((a_)[0]) + MUST_BE_ARRAY(a_))
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# define ARRSZ_PAIR(a_) a_, ARRAY_SIZE(a_)
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# define STRINGIFY(...) #__VA_ARGS__
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# define STRINGIFY_VAL(...) STRINGIFY(__VA_ARGS__)
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# ifndef MAX
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# define MAX(a, b) (((a) > (b)) ? (a) : (b))
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# endif
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# ifndef MIN
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# define MIN(a, b) (((a) < (b)) ? (a) : (b))
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# endif
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# define CLAMP(val, min, max) MIN(MAX(min, val), max)
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# ifndef ROUNDUP
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# define ROUNDUP(val_, div_) ((((val_) + (div_) - 1) / (div_)) * (div_))
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# endif
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# ifndef offsetofend
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# define offsetofend(type_, member_) \
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(offsetof(type_, member_) + sizeof(((type_ *)0)->member_))
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# endif
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#ifndef cast_ptr
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# define cast_ptr(type, var) ((type) (uintptr_t) (const volatile void *) (var))
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#endif
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#ifndef containerof
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# define containerof(x, s, m) \
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cast_ptr(s *, (const volatile char *) (x) - offsetof(s, m))
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#endif
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static inline bool
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is_filled(const char *ptr, char fill, size_t size)
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{
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while (size--)
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if (*ptr++ != fill)
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return false;
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return true;
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}
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# define IS_ARRAY_ZERO(arr_) \
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is_filled((const char *) (arr_), 0, sizeof(arr_) + MUST_BE_ARRAY(arr_))
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#endif /* !STRACE_MACROS_H */
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