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LibC: Allow multiple includes of <assert.h>
ISO C requires in section 7.2: The assert macro is redefined according to the current state of NDEBUG each time that <assert.h> is included. Also add tests for `assert` multiple inclusion accordingly.
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3 changed files with 36 additions and 7 deletions
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@ -4,16 +4,25 @@
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#ifndef _ASSERT_H
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# define _ASSERT_H
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# define __stringify_helper(x) # x
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# define __stringify(x) __stringify_helper(x)
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# ifndef __cplusplus
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# define static_assert _Static_assert
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# endif
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#endif
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#include <sys/cdefs.h>
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#undef assert
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__BEGIN_DECLS
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#ifndef NDEBUG
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__attribute__((noreturn)) void __assertion_failed(const char* msg);
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# define __stringify_helper(x) # x
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# define __stringify(x) __stringify_helper(x)
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# define assert(expr) \
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(__builtin_expect(!(expr), 0) \
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? __assertion_failed(#expr "\n" __FILE__ ":" __stringify(__LINE__)) \
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@ -23,8 +32,4 @@ __attribute__((noreturn)) void __assertion_failed(const char* msg);
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# define assert(expr) ((void)(0))
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#endif
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#ifndef __cplusplus
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# define static_assert _Static_assert
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#endif
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__END_DECLS
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