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Re: [PATCH]: Fix PR tree-optimization/21407
On Fri, May 13, 2005 at 10:35:00AM +0200, Kai Henningsen wrote:
> And so does the Linux kernel, though I don't have a snippet handy.
> Embedding structs and recovering the outer from the inner using offsetof
> is an important part of the basic design.
/*
* container_of - cast a member of a structure out to the containing structure
*
* @ptr: the pointer to the member.
* @type: the type of the container struct this is embedded in.
* @member: the name of the member within the struct.
*
*/
#define container_of(ptr, type, member) ({ \
const typeof( ((type *)0)->member ) *__mptr = (ptr); \
(type *)( (char *)__mptr - offsetof(type,member) );})
most prominently used in the linked list implementation