On Jan 4, 2014, at 4:29 PM, Hitoshi Mitake wrote:
> Current nilfs_check_ondisk_sizes() checks sizes of important structs
> at run time. The checking should be done at build time. This patch
> adds a new macro, BUILD_BUG_ON(), for this purpose. It is similar to
> static_assert() of C++11. If an argument is true, the macro causes a
> bulid error.
>
> Below is an example of BUILD_BUG_ON(). When the checked conditions are
> true like below:
>
> /* intentional change for testing BUILD_BUG_ON() */
>
> static __attribute__((used)) void nilfs_check_ondisk_sizes(void)
> {
> BUILD_BUG_ON(sizeof(struct nilfs_inode) > NILFS_MIN_BLOCKSIZE);
So, why do we need to have function for the case of checking on compilation
phase?
I suppose that we need to have some run-time check anyway. Your approach
is correct for the current state of the code. But I feel a necessity in
run-time check
anyway. Maybe it looks like a paranoia. :) Maybe it needs to extend checking
in this place.
Thanks,
Vyacheslav Dubeyko.
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