[Asterisk-Dev] ast_mutex_lock/unlock usage

[David C. Troy]

Mark et al,

I have been doing some enhancements to app_queue;  I have some idea of 
when it is appropriate/necessary to use ast_mutex_lock to lock a queue 
and/or queue_entry, but I am not getting a consistent feeling for when 
it's strictly necessary.

I am doing it whenever I think to myself 1) gee, it'd be really bad if 
the object that this pointer references goes away while I am doing this, 
2) this is all really fast stuff that isn't going to tie things up (i.e. 
playing sounds inside of a lock seems bad, but doing some quick math 
and setting a queue property seems good).

What other guidelines should I be using for this?

Thanks,
Dave

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