[vlc-devel] [PATCH 0/5] A 2nd subtitle feature

[Rémi Denis-Courmont]

Le 2015-09-23 11:17, Aaron Wang a écrit :
> About the place of i_ord, I haven't modified it yet.
> Because I can't decide a good place. I don't really quite
> understant how it could be undefined behavior.

The specifications (e.g. ISO C11 and POSIX) say so. There are no needs 
to understand: it is an arbitrary convention set by the specifications 
and followed by the compilers.

Why the specifications says so and what could happen if you ignore them 
are long topics beyond the scope of the VLC code reviews. Some ideas are 
there:
https://software.intel.com/en-us/blogs/2013/01/06/benign-data-races-what-could-possibly-go-wrong
-- 
Rémi Denis-Courmont
http://www.remlab.net/