locks needed in shared lib cache?

martin.gee · 2015-09-22T11:04:53+00:00

Hello! On Fri, Sep 18, 2015 at 5:23 AM, SplitIce wrote: > Sorry, I meant body filter by lua. > Well, you can always find out the actual output filter...

locks needed in shared lib cache?

martin.gee

I've written a C shared lib (which I load via Lua FFI) that has its own internal cache for private state data. I do call the via lua the Share Lib for a function on each user request.

I'm curious if I need to use a mutex / lock for cache updates? Give the single threaded event module of NGINX I wasn't sure it its necessary.

I wanted to confirm with you guys before putting mutex code in place.

TIA,

Martin

agentzh

Hello!

On Tue, Sep 22, 2015 at 11:04 AM, Martin Gee wrote:
> I've written a C shared lib (which I load via Lua FFI) that has its own
> internal cache for private state data.  I do call the via lua the Share Lib
> for a function on each user request.
>
> I'm curious if I need to use a mutex / lock for cache updates?

No, it's not needed at all.

>  Give the
> single threaded event module of NGINX I wasn't sure it its necessary.
>

Yeah, that's the beauty of single threaded apps :)

Regards,
-agentzh