1*ff7af0d3SToomas Soome /* 2*ff7af0d3SToomas Soome * This file and its contents are supplied under the terms of the 3*ff7af0d3SToomas Soome * Common Development and Distribution License ("CDDL"), version 1.0. 4*ff7af0d3SToomas Soome * You may only use this file in accordance with the terms of version 5*ff7af0d3SToomas Soome * 1.0 of the CDDL. 6*ff7af0d3SToomas Soome * 7*ff7af0d3SToomas Soome * A full copy of the text of the CDDL should have accompanied this 8*ff7af0d3SToomas Soome * source. A copy of the CDDL is also available via the Internet at 9*ff7af0d3SToomas Soome * http://www.illumos.org/license/CDDL. 10*ff7af0d3SToomas Soome */ 11*ff7af0d3SToomas Soome 12*ff7af0d3SToomas Soome /* 13*ff7af0d3SToomas Soome * Copyright 2017 Toomas Soome <tsoome@me.com> 14*ff7af0d3SToomas Soome */ 15*ff7af0d3SToomas Soome 16*ff7af0d3SToomas Soome #ifndef _SYS_STDDEF_H 17*ff7af0d3SToomas Soome #define _SYS_STDDEF_H 18*ff7af0d3SToomas Soome 19*ff7af0d3SToomas Soome /* 20*ff7af0d3SToomas Soome * Commonly used macros and definitions. 21*ff7af0d3SToomas Soome */ 22*ff7af0d3SToomas Soome 23*ff7af0d3SToomas Soome #ifdef __cplusplus 24*ff7af0d3SToomas Soome extern "C" { 25*ff7af0d3SToomas Soome #endif 26*ff7af0d3SToomas Soome 27*ff7af0d3SToomas Soome #if !defined(offsetof) 28*ff7af0d3SToomas Soome #if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5) 29*ff7af0d3SToomas Soome #define offsetof(s, m) __builtin_offsetof(s, m) 30*ff7af0d3SToomas Soome #else 31*ff7af0d3SToomas Soome #if __cplusplus >= 199711L 32*ff7af0d3SToomas Soome #define offsetof(s, m) (std::size_t)(&(((s *)NULL)->m)) 33*ff7af0d3SToomas Soome #else 34*ff7af0d3SToomas Soome #define offsetof(s, m) ((size_t)(&(((s *)NULL)->m))) 35*ff7af0d3SToomas Soome #endif 36*ff7af0d3SToomas Soome #endif 37*ff7af0d3SToomas Soome #endif /* !offsetof */ 38*ff7af0d3SToomas Soome 39*ff7af0d3SToomas Soome #if !defined(container_of) 40*ff7af0d3SToomas Soome #define container_of(m, s, name) \ 41*ff7af0d3SToomas Soome (void *)((uintptr_t)(m) - (uintptr_t)offsetof(s, name)) 42*ff7af0d3SToomas Soome #endif /* !container_of */ 43*ff7af0d3SToomas Soome 44*ff7af0d3SToomas Soome #ifdef __cplusplus 45*ff7af0d3SToomas Soome } 46*ff7af0d3SToomas Soome #endif 47*ff7af0d3SToomas Soome 48*ff7af0d3SToomas Soome #endif /* _SYS_STDDEF_H */ 49