1/*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1992, 1993
5 * The Regents of the University of California. All rights reserved.
6 * (c) UNIX System Laboratories, Inc.
7 * All or some portions of this file are derived from material licensed
8 * to the University of California by American Telephone and Telegraph
9 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
10 * the permission of UNIX System Laboratories, Inc.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37#include <sys/cdefs.h>
38
39/*
40 * Unlike other ANSI header files, <assert.h> may usefully be included
41 * multiple times, with and without NDEBUG defined.
42 */
43
44#undef assert
45#undef _assert
46#undef __assert_unreachable
47
48#ifdef NDEBUG
49#define assert(e) ((void)0)
50#define _assert(e) ((void)0)
51#if __BSD_VISIBLE
52#define __assert_unreachable() __unreachable()
53#endif /* __BSD_VISIBLE */
54#else
55#define _assert(e) assert(e)
56
57#define assert(e) ((e) ? (void)0 : __assert(__func__, __FILE__, \
58 __LINE__, #e))
59#if __BSD_VISIBLE
60#define __assert_unreachable() assert(0 && "unreachable segment reached")
61#endif /* __BSD_VISIBLE */
62#endif /* NDEBUG */
63
64#ifndef _ASSERT_H_
65#define _ASSERT_H_
66
67/*
68 * Static assertions. In principle we could define static_assert for
69 * C++ older than C++11, but this breaks if _Static_assert is
70 * implemented as a macro.
71 *
72 * C++ template parameters may contain commas, even if not enclosed in
73 * parentheses, causing the _Static_assert macro to be invoked with more
74 * than two parameters.
75 */
76#if __ISO_C_VISIBLE >= 2011 && !defined(__cplusplus)
77#define static_assert _Static_assert
78#endif
79
80__BEGIN_DECLS
81void __assert(const char *, const char *, int, const char *) __dead2;
82__END_DECLS
83
84#endif /* !_ASSERT_H_ */