Cache algorithms: implementation or library available?

[Hugo Ferreira <hmf@inescporto.pt>]

Hello,

I would like to know if anyone has or knows of an Ocaml
library or open-source code implementation of some cache
algorithms (example: least recently used).

Basically I need to cache a function that maps a list
of ordered integers into a value (float, integer). I
would like something that allows setting a maximum size
of the map and automatically discards the data.

Any pointers are appreciated.

TIA,
Hugo F.