sig
val physical_ram : unit -> int64
val ram_limit_spec : Core.Std.Arg.t
val wrap_block_signals : (unit -> 'a) -> 'a
val ensure_at_exit : unit -> unit
val get_ppids : Core.Std.Pid.t -> Core.Std.Pid.t list option
val ounit_tests : unit -> OUnit.test
end