[asterisk-dev] OT: Refecence counting (was invasive fixes to chan_iax2 in 1.4)

[Vasil Kolev]

В пт, 2007-08-17 в 16:20 -0400, Russell Bryant написа:

> Another reason that I chose to go with astobj2 was that I *know* this is not the
> end of problems of this type.  In fact, there is a nice set of crashes on the
> bug tracker which the fix will be converting the ast_channel struct over to a
> reference counted object model, which is going to be a big job.  Since we are
> likely going to have to do more conversions of object handling to this method, I
> figured it was worth bringing in astobj2 to 1.4 so that we can use it as needed,
> and not do all of this work using a model that we know will be deprecated in the
> near future.
> 
<rant>

This has been a pet peeve of mine, that a lot structures in asterisk
aren't reference-counted and are accessed from a lot of threads with
some extremely weird locking rules. A general reference-counting for
_everything_ that's used cross-thread would fix a lot of weird problems.

(yes, I know code talks, bullshit walks, but there are some pretty
serious reasons for me not to dive in that code, like lack of time...)

</rant>

The same problem might arise with the cdr structures, for example, I had
some pretty weird problems with some of our custom development and the
handling of the CDRs (that changed in weird ways) in 1.4...
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