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AOSP: tune2fs/resize2fs: make vendor_ramdisk_available.
[tools/e2fsprogs.git] / lib / ext2fs / compiler.h
1 #ifndef _EXT2FS_COMPILER_H
2 #define _EXT2FS_COMPILER_H
3
4 #ifndef __has_builtin
5 #define __has_builtin(x) 0
6 #endif
7
8 #undef offsetof
9 #if __has_builtin(__builtin_offsetof)
10 #define offsetof(TYPE, MEMBER) __builtin_offsetof(TYPE, MEMBER)
11 #elif defined(__compiler_offsetof)
12 #define offsetof(TYPE,MEMBER) __compiler_offsetof(TYPE,MEMBER)
13 #else
14 #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
15 #endif
16
17 #define container_of(ptr, type, member) ({                      \
18         const __typeof__( ((type *)0)->member ) *__mptr = (ptr);        \
19         (type *)( (char *)__mptr - offsetof(type,member) );})
20
21
22 #endif /* _EXT2FS_COMPILER_H */