misc.h

来自「linux下开源图片codec」· C头文件 代码 · 共 10 行

/*
 * misc useful #defines ...
 */

#define container_of(ptr, type, member) ({			\
        const typeof( ((type *)0)->member ) *__mptr = (ptr);	\
        (type *)( (char *)__mptr - offsetof(type,member) );})

#define array_size(x) (sizeof(x)/sizeof(x[0]))