14870e0a7SRichard PALO /* 24870e0a7SRichard PALO * This file and its contents are supplied under the terms of the 34870e0a7SRichard PALO * Common Development and Distribution License ("CDDL"), version 1.0. 44870e0a7SRichard PALO * You may only use this file in accordance with the terms of version 54870e0a7SRichard PALO * 1.0 of the CDDL. 64870e0a7SRichard PALO * 74870e0a7SRichard PALO * A full copy of the text of the CDDL should have accompanied this 84870e0a7SRichard PALO * source. A copy of the CDDL is also available via the Internet at 94870e0a7SRichard PALO * http://www.illumos.org/license/CDDL. 104870e0a7SRichard PALO */ 114870e0a7SRichard PALO 124870e0a7SRichard PALO /* 134870e0a7SRichard PALO * Copyright 2014-2016 PALO, Richard. 144870e0a7SRichard PALO */ 154870e0a7SRichard PALO 164870e0a7SRichard PALO #ifndef _SYS_NULL_H 174870e0a7SRichard PALO #define _SYS_NULL_H 184870e0a7SRichard PALO 19a3848ed0SAurélien Larcher #include <sys/feature_tests.h> 20a3848ed0SAurélien Larcher 214870e0a7SRichard PALO #ifndef NULL 224870e0a7SRichard PALO 23*75f3d687SToomas Soome /* 24*75f3d687SToomas Soome * POSIX.1-2008 requires that the NULL macro be cast to type void *. 25*75f3d687SToomas Soome */ 26*75f3d687SToomas Soome 27*75f3d687SToomas Soome #if !defined(__cplusplus) 28*75f3d687SToomas Soome #define NULL ((void *)0) 29*75f3d687SToomas Soome #else 30*75f3d687SToomas Soome 31*75f3d687SToomas Soome /* 32*75f3d687SToomas Soome * ISO C++ requires that the NULL macro be a constant integral type evaluating 33*75f3d687SToomas Soome * to zero until C++11, and an integer or pointer literal with value zero from 34*75f3d687SToomas Soome * C++11 onwards. 35*75f3d687SToomas Soome */ 36*75f3d687SToomas Soome 37*75f3d687SToomas Soome #if __cplusplus >= 201103L 38*75f3d687SToomas Soome #define NULL nullptr 39*75f3d687SToomas Soome #else 40*75f3d687SToomas Soome #if defined(_LP64) 41*75f3d687SToomas Soome #define NULL 0L 42*75f3d687SToomas Soome #else 43*75f3d687SToomas Soome #define NULL 0 44*75f3d687SToomas Soome #endif /* _LP64 */ 45*75f3d687SToomas Soome #endif /* C++11 */ 46*75f3d687SToomas Soome #endif /* !__cplusplus */ 474870e0a7SRichard PALO 484870e0a7SRichard PALO #endif /* NULL */ 494870e0a7SRichard PALO 504870e0a7SRichard PALO #endif /* _SYS_NULL_H */ 51