1 /* 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1991, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Berkeley Software Design, Inc. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)cdefs.h 8.8 (Berkeley) 1/9/95 35 */ 36 37 #ifndef CDEFS_H 38 #define CDEFS_H 39 40 #define __predict_true(exp) __builtin_expect((exp) != 0, 1) 41 #define __predict_false(exp) __builtin_expect((exp) != 0, 0) 42 43 #if defined(__cplusplus) 44 #define __BEGIN_EXTERN_C extern "C" { 45 #define __END_EXTERN_C } 46 #ifndef __BEGIN_DECLS 47 #define __BEGIN_DECLS extern "C" { 48 #endif 49 #ifndef __END_DECLS 50 #define __END_DECLS } 51 #endif 52 #else 53 #define __BEGIN_EXTERN_C 54 #define __END_EXTERN_C 55 #ifndef __BEGIN_DECLS 56 #define __BEGIN_DECLS 57 #endif 58 #ifndef __END_DECLS 59 #define __END_DECLS 60 #endif 61 #endif 62 63 #if defined(__cplusplus) 64 #define __BEGIN_EXTERN_C extern "C" { 65 #define __END_EXTERN_C } 66 #else 67 #define __BEGIN_EXTERN_C 68 #define __END_EXTERN_C 69 #endif 70 71 #define __P(protos) protos /* full-blown ANSI C */ 72 #define __CONCAT(x,y) x ## y 73 #define __STRING(x) #x 74 75 #define __aligned(x) __attribute__((__aligned__(x))) 76 #define __section(x) __attribute__((__section__(x))) 77 78 #define __always_inline __attribute__((__always_inline__)) 79 #define __attribute_const__ __attribute__((__const__)) 80 #define __attribute_pure__ __attribute__((__pure__)) 81 #define __dead __attribute__((__noreturn__)) 82 #define __noreturn __attribute__((__noreturn__)) 83 #define __mallocfunc __attribute__((__malloc__)) 84 #define __packed __attribute__((__packed__)) 85 #define __returns_twice __attribute__((__returns_twice__)) 86 #define __unused __attribute__((__unused__)) 87 #define __used __attribute__((__used__)) 88 89 #define __printflike(x, y) __attribute__((__format__(printf, x, y))) 90 #define __scanflike(x, y) __attribute__((__format__(scanf, x, y))) 91 #define __strftimelike(x) __attribute__((__format__(strftime, x, 0))) 92 93 94 #if defined(__cplusplus) 95 #define __CAST(_k,_t,_v) (_k<_t>(_v)) 96 #else 97 #define __CAST(_k,_t,_v) ((_t) (_v)) 98 #endif 99 100 #define __ALIGN(value, alignment) (((value) + (alignment)-1) & ~((alignment)-1)) 101 102 #define __GLOBL(sym) __asm__(".globl " __STRING(sym)) 103 #define __WEAK(sym) __asm__(".weak " __STRING(sym)) 104 105 #endif