Re: [HACKERS] nonblocking lock?

> Is it possible to do a nonblocking lock? That is, 
> I want several clients to execute,
> 
>     begin
>     if table A is locked
>     then
>         go around doing stuff on other tables
>     else
>         lock A and do stuff on A
>     endif
> 
> the problem is, if I use normal lock, then 
> after one client has locked and is doing stuff on A
> the other one will block and thus it won't be able
> to go around doing stuff on other tables. Is it
> possible to do a nonblocking lock that will just
> fail if the table is locked already? 

Try with user locks. You can find the code in contrib/userlocks.

-- 
Massimo Dal Zotto

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