1*b668e7f7Sriastradh /* $NetBSD: build_bug.h,v 1.4 2021/12/19 11:14:34 riastradh Exp $ */ 20006b9c8Sriastradh 30006b9c8Sriastradh /*- 40006b9c8Sriastradh * Copyright (c) 2020 The NetBSD Foundation, Inc. 50006b9c8Sriastradh * All rights reserved. 60006b9c8Sriastradh * 70006b9c8Sriastradh * Redistribution and use in source and binary forms, with or without 80006b9c8Sriastradh * modification, are permitted provided that the following conditions 90006b9c8Sriastradh * are met: 100006b9c8Sriastradh * 1. Redistributions of source code must retain the above copyright 110006b9c8Sriastradh * notice, this list of conditions and the following disclaimer. 120006b9c8Sriastradh * 2. Redistributions in binary form must reproduce the above copyright 130006b9c8Sriastradh * notice, this list of conditions and the following disclaimer in the 140006b9c8Sriastradh * documentation and/or other materials provided with the distribution. 150006b9c8Sriastradh * 160006b9c8Sriastradh * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 170006b9c8Sriastradh * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 180006b9c8Sriastradh * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 190006b9c8Sriastradh * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 200006b9c8Sriastradh * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 210006b9c8Sriastradh * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 220006b9c8Sriastradh * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 230006b9c8Sriastradh * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 240006b9c8Sriastradh * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 250006b9c8Sriastradh * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 260006b9c8Sriastradh * POSSIBILITY OF SUCH DAMAGE. 270006b9c8Sriastradh */ 280006b9c8Sriastradh 290006b9c8Sriastradh #ifndef _LINUX_BUILD_BUG_H_ 300006b9c8Sriastradh #define _LINUX_BUILD_BUG_H_ 310006b9c8Sriastradh 320006b9c8Sriastradh #include <lib/libkern/libkern.h> 330006b9c8Sriastradh 348a5e8a78Sriastradh /* Required to be false _or_ nonconstant. */ 358a5e8a78Sriastradh #define BUILD_BUG_ON(EXPR) \ 368a5e8a78Sriastradh CTASSERT(__builtin_choose_expr(__builtin_constant_p(EXPR), !(EXPR), 1)) 370006b9c8Sriastradh 388a5e8a78Sriastradh /* Required to be constant _and_ true. XXX Should take optional message. */ 398a5e8a78Sriastradh #define static_assert(EXPR) CTASSERT(EXPR) 400006b9c8Sriastradh 410006b9c8Sriastradh #define BUILD_BUG() do {} while (0) 428a5e8a78Sriastradh #define BUILD_BUG_ON_MSG(EXPR,MSG) BUILD_BUG_ON(EXPR) 430006b9c8Sriastradh #define BUILD_BUG_ON_INVALID(EXPR) ((void)sizeof((long)(EXPR))) 44*b668e7f7Sriastradh #define BUILD_BUG_ON_ZERO(EXPR) ((int)(0*sizeof(int[(EXPR) ? -1 : 1]))) 450006b9c8Sriastradh 460006b9c8Sriastradh #endif /* _LINUX_BUILD_BUG_H_ */ 47