DomainPC: Domain Per Core

Offers Domain spawning functions which can ensure that each domain is set to run on its own physical core using CPU affinities from the ocaml-processor library. These functions are described in domainpc_sig.mli.

It also offers a replacement of the standard library's Domain module where these functions are available.

Note: when using the library one should not use Domain.spawn (from the standard library) as it would break the library's invariant guaranteeing that domains run on separate cores.