lib/ext2fs/compiler.h

   1 #ifndef _EXT2FS_COMPILER_H
   2 #define _EXT2FS_COMPILER_H
   3
   4 #include <stddef.h>
   5
   6 #ifdef __GNUC__
   7
   8 #define container_of(ptr, type, member) ({                              \
   9         __typeof__( ((type *)0)->member ) *__mptr = (ptr);      \
  10         (type *)( (char *)__mptr - offsetof(type,member) );})
  11 #else
  12 #define container_of(ptr, type, member)                         \
  13         ((type *)((char *)(ptr) - offsetof(type, member)))
  14 #endif
  15
  16
  17 #endif /* _EXT2FS_COMPILER_H */