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/**************************************************************************
*
* $Id: mbg_cof.h 1.1.1.3 2016/08/10 14:19:00 martin TEST $
*
* Copyright (c) Meinberg Funkuhren, Bad Pyrmont, Germany
*
* Description:
* Container macros (see Linux Kernel)
*
* -----------------------------------------------------------------------
* $Log: mbg_cof.h $
* Revision 1.1.1.3 2016/08/10 14:19:00 martin
* *** empty log message ***
* Revision 1.1.1.2 2016/08/10 14:15:14 martin
* *** empty log message ***
* Revision 1.1.1.1 2016/08/09 15:59:01 martin
* Preliminary compatibility changes.
* Revision 1.1 2015/09/09 10:42:27 martin
* Initial revision by philipp.
*
**************************************************************************/
#ifndef _MBG_COF_H
#define _MBG_COF_H
/* Other headers to be included */
#include <mbg_tgt.h>
#if !defined( MBG_TGT_KERNEL )
#include <stddef.h> // for offsetof()
#endif
#ifdef _MBG_COF
#define _ext
#define _DO_INIT
#else
#define _ext extern
#endif
/* Start of header body */
#ifdef __cplusplus
extern "C" {
#endif
#if defined( MBG_TGT_POSIX )
// A special construct supported by gcc/clang and and implemented
// e.g. in the Linux kernel, which is said to be very type-safe:
#define mbg_container_of( _ptr, _type, _member ) ({ \
const typeof( ((_type *)0)->_member ) *__mptr = (_ptr); \
(_type *)((char *)__mptr - offsetof(_type,_member));})
#else
// A different implementation in ANSI C, which supports type-checking anyway:
#define mbg_container_of( _ptr, _type, _member ) \
( (_type *)( (char *)(1 ? (_ptr) : &((_type *)0)->_member) - offsetof( _type, _member )))
#endif
/* function prototypes: */
/* ----- function prototypes begin ----- */
/* This section was generated automatically */
/* by MAKEHDR, do not remove the comments. */
/* (no header definitions found) */
/* ----- function prototypes end ----- */
#ifdef __cplusplus
}
#endif
/* End of header body */
#undef _ext
#undef _DO_INIT
#endif /* _MBG_COF_H */
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