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712f81feea
The kernel has had a version of this since
c79cee7136 ("kernel: provide panicky version of __unreachable"), and
userland can benefit from the same. __unreachable is largely
inadequate because it's *not* an assertion of any sort, so we're not
really alerted to a problem that we could've anticipated.
Reviewed by: emaste, imp, jhb, olce
Differential Revision: https://reviews.freebsd.org/D48077
84 lines
3.1 KiB
C
84 lines
3.1 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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/*
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* Unlike other ANSI header files, <assert.h> may usefully be included
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* multiple times, with and without NDEBUG defined.
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*/
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#undef assert
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#undef _assert
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#undef __assert_unreachable
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#ifdef NDEBUG
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#define assert(e) ((void)0)
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#define _assert(e) ((void)0)
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#if __BSD_VISIBLE
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#define __assert_unreachable() __unreachable()
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#endif /* __BSD_VISIBLE */
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#else
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#define _assert(e) assert(e)
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#define assert(e) ((e) ? (void)0 : __assert(__func__, __FILE__, \
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__LINE__, #e))
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#if __BSD_VISIBLE
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#define __assert_unreachable() assert(0 && "unreachable segment reached")
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#endif /* __BSD_VISIBLE */
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#endif /* NDEBUG */
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#ifndef _ASSERT_H_
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#define _ASSERT_H_
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/*
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* Static assertions. In principle we could define static_assert for
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* C++ older than C++11, but this breaks if _Static_assert is
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* implemented as a macro.
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*
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* C++ template parameters may contain commas, even if not enclosed in
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* parentheses, causing the _Static_assert macro to be invoked with more
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* than two parameters.
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*/
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#if __ISO_C_VISIBLE >= 2011 && !defined(__cplusplus)
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#define static_assert _Static_assert
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#endif
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__BEGIN_DECLS
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void __assert(const char *, const char *, int, const char *) __dead2;
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__END_DECLS
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#endif /* !_ASSERT_H_ */
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