[vlc-devel] Another HLS question: vlc_object_alive vs. Close

Chris Smowton cs448 at cam.ac.uk
Tue Jun 5 11:36:06 CEST 2012

>> 1. Can I always rely upon getting a Close call in the situations when
>> the existing code is using obj-alive to determine if we should die?
> Do not use object alive. It does not warrant anything other than ->b_die
> was set.
That's not what I meant. I meant, are all situations when I should die 
heralded by a Close call, or are there other asynchronous abort signals 
that I should be watching?
>> 2. Relatedly, can Close be legally invoked whilst we're inside another
>> module callback (Open or Control)?
> There is no answer here. A plugin can always call its own functions if
> said functions are adequately written. For instance, many plugins call
> Close() from Open() on their error paths.
That's not what I meant either. I meant, suppose I am currently waiting 
inside Read or something like that when the user hits stop. Will I get a 
Close call at that time, or will it only get called after Read returns 
(e.g. because the same thread is responsible for both calls, or there's 
a convention of interlocking module entry points, or...)

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