nginx memory management algorithm?

[naquad]

Hi.

I'm trying to figure out how does nginx manage its memory per request. From
what I understand it uses region-based memory management (implemented in
src/core/ngx_palloc.{h,c}).
But is there any documentation on details of its implementation and
algorithm itself?
I've tried to just read through sources, but I can't get figure algorithm
out of them :(
Could somebody please sched some light on this?

Thank you.
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