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8efede20ef
Both GCC and clang already supports C11's _Static_assert, so use it instead of defining our own macro.
61 lines
2.0 KiB
C
61 lines
2.0 KiB
C
/*
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* libkmod - interface to kernel module operations
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*
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* Copyright (C) 2011-2013 ProFUSION embedded systems
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#pragma once
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#include <stddef.h>
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#define assert_cc(expr) \
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_Static_assert((expr), #expr)
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#if HAVE_TYPEOF
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#define check_types_match(expr1, expr2) \
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((typeof(expr1) *)0 != (typeof(expr2) *)0)
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#else
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/* Without typeof, we can only test the sizes. */
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#define check_types_match(expr1, expr2) \
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assert_cc(sizeof(expr1) == sizeof(expr2))
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#endif /* HAVE_TYPEOF */
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#define container_of(member_ptr, containing_type, member) \
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((containing_type *) \
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((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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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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/* Temporaries for importing index handling */
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#define NOFAIL(x) (x)
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#define fatal(x...) do { } while (0)
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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 _unused_ __attribute__((unused))
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#define _always_inline_ __inline__ __attribute__((always_inline))
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