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move container_of to types.h

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The container_of macro is useful as a general solution.  It belongs
in types.h, rather than target.h where it was introduced.  Requires
the offsetof macro, which comes from <stddef.h> (moved as well).
This commit is contained in:
Zachary T Welch 2009-11-16 02:29:09 -08:00
parent cbc0578372
commit f0ce88b3af
2 changed files with 15 additions and 13 deletions
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15
src/helper/types.h
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@ -23,6 +23,7 @@
#ifndef TYPES_H
#define TYPES_H
#include <stddef.h>
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
@ -58,6 +59,20 @@ typedef bool _Bool;
#define stringify(s) __stringify(s)
#define __stringify(s) #s
/**
* Cast a member of a structure out to the containing structure.
* @param ptr The pointer to the member.
* @param type The type of the container struct this is embedded in.
* @param member The name of the member within the struct.
*
* This is a mechanism which is used throughout the Linux kernel.
*/
#define container_of(ptr, type, member) ({ \
const typeof( ((type *)0)->member ) *__mptr = (ptr); \
(type *)( (char *)__mptr - offsetof(type,member) );})
/* DANGER!!!! here be dragons!
*
* Leave these fn's as byte accesses because it is safe

13
src/target/target.h
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@ -26,7 +26,6 @@
#ifndef TARGET_H
#define TARGET_H
#include <stddef.h>
#include "types.h"
#include "jim.h"
@ -39,18 +38,6 @@ struct mem_param;
struct reg_param;
/**
* Cast a member of a structure out to the containing structure.
* @param ptr The pointer to the member.
* @param type The type of the container struct this is embedded in.
* @param member The name of the member within the struct.
*
* This is a mechanism which is used throughout the Linux kernel.
*/
#define container_of(ptr, type, member) ({ \
const typeof( ((type *)0)->member ) *__mptr = (ptr); \
(type *)( (char *)__mptr - offsetof(type,member) );})
/*
* TARGET_UNKNOWN = 0: we don't know anything about the target yet
* TARGET_RUNNING = 1: the target is executing user code