container_of宏说明
来源:互联网 发布:淘宝的极有家是正品吗 编辑:程序博客网 时间:2024/05/19 23:57
#include <linux/kernel.h>
/**
* 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) );})
#undef offsetof
#ifdef __compiler_offsetof
#define offsetof(TYPE,MEMBER) __compiler_offsetof(TYPE,MEMBER)
#else
#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
#endif
#endif /* __KERNEL__ */
const {member类型} * __mptr = ptr; // __mpt是指向member的指针
{type类型 *} (char *)__mptr - {member指针相对type指针的偏移量}
因此container_of(ptr,type,member)实现通过type中的member指针得到type指针的用处
- container_of宏说明
- container_of宏说明
- container_of()宏详细说明
- container_of 例子说明
- container_of()宏
- container_of()宏
- container_of()宏
- container_of()宏
- container_of()宏
- container_of()宏
- container_of()宏
- container_of()宏
- container_of()宏
- container_of()宏
- container_of()宏
- container_of()宏
- container_of宏
- container_of()宏
- LINUX 2440-GPIO操作
- 基础知识
- android AIDL 编程
- IS_ERR()说明
- 最好用的三维虚拟仿真制作软件VES2.6正式版
- container_of宏说明
- Globalization
- FASM 1.67 程序者手册
- ConcurrentHashMap
- 批量删除 desktop_.ini 文件
- 游标脚本性能问题解决与分析 (1) - Cursor Performance Analysis
- OgreImporter v0.50版发布
- 0810
- OGRE资源的四种状态