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/*
* This file and its contents are supplied under the terms of the
* Common Development and Distribution License ("CDDL"), version 1.0.
* You may only use this file in accordance with the terms of version
* 1.0 of the CDDL.
*
* A full copy of the text of the CDDL should have accompanied this
* source. A copy of the CDDL is also available via the Internet at
* http://www.illumos.org/license/CDDL.
*/
/*
* Copyright 2017 Toomas Soome <tsoome@me.com>
*/
#ifndef _SYS_STDDEF_H
#define _SYS_STDDEF_H
/*
* Commonly used macros and definitions.
*/
#ifdef __cplusplus
extern "C" {
#endif
#if !defined(offsetof)
#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5)
#define offsetof(s, m) __builtin_offsetof(s, m)
#else
#if __cplusplus >= 199711L
#define offsetof(s, m) (std::size_t)(&(((s *)NULL)->m))
#else
#define offsetof(s, m) ((size_t)(&(((s *)NULL)->m)))
#endif
#endif
#endif /* !offsetof */
#if !defined(container_of)
/*
* We must not expose container_of() to userland, but we want it
* to be available for early boot and for the kernel.
*/
#if ((defined(_KERNEL) || defined(_FAKE_KERNEL)) && !defined(_KMEMUSER)) || \
(defined(_BOOT) && defined(_KMEMUSER))
#define container_of(m, s, name) \
(void *)((uintptr_t)(m) - (uintptr_t)offsetof(s, name))
#endif
#endif /* !container_of */
#ifdef __cplusplus
}
#endif
#endif /* _SYS_STDDEF_H */
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