[Asterisk-Dev] ast_flags question

[Kevin P. Fleming]

Holger Schurig wrote:

> struct bitstruct {
>         int b : 1;
> };
> 
> struct bitstruct b;

<snip>

> That saves bytes and is very clear. It can be used whenever we transfer 
> the struct over the wire, because the memory layout is not defined from 
> compiler to compiler. But for program internal structs, this can be used 
> quite nicely.

This does not save any bytes; this struct will still require 32 bits 
(four bytes) for storage (see the "int" specified there?).

It's really a toss-up as to whether to do it this way or the current 
way; the generated object code is pretty much identical. If it had been 
my decision I would have implemented it the way you suggest, but it was 
put into CVS before we got a chance to discuss it.