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Replace custom field offset macro with the system __offsetof() macro.

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Reviewed by:	bde
This commit is contained in:
hsu 2003-07-09 22:23:10 +00:00
parent eb0aaa7a47
commit 97cc223e64
1 changed files with 3 additions and 14 deletions
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17
sys/sys/vnode.h
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@ -460,20 +460,9 @@ extern struct vnodeop_desc *vnodeop_descs[];
*/
extern struct mtx mntvnode_mtx;
/*
* This macro is very helpful in defining those offsets in the vdesc struct.
*
* This is stolen from X11R4. I ignored all the fancy stuff for
* Crays, so if you decide to port this to such a serious machine,
* you might want to consult Intrinsic.h's XtOffset{,Of,To}.
*/
#define VOPARG_OFFSET(p_type,field) \
((int) (((char *) (&(((p_type)NULL)->field))) - ((char *) NULL)))
#define VOPARG_OFFSETOF(s_type,field) \
VOPARG_OFFSET(s_type*,field)
#define VOPARG_OFFSETTO(S_TYPE,S_OFFSET,STRUCT_P) \
((S_TYPE)(((char*)(STRUCT_P))+(S_OFFSET)))
#define VOPARG_OFFSETOF(s_type, field) __offsetof(s_type, field)
#define VOPARG_OFFSETTO(s_type, s_offset, struct_p) \
((s_type)(((char*)(struct_p)) + (s_offset)))
/*
* This structure is used to configure the new vnodeops vector.