module Nfs: sig .. end
Nfs has analogs of functions in 
Core.Lock_file.Nfs; see there for documentation.
    In addition to adding 
Deferred's, 
blocking_create was renamed 
waiting_create to
    avoid the impression that it blocks async.
 
val create : ?message:string -> string -> bool Import.Deferred.t
val create_exn : ?message:string -> string -> unit Import.Deferred.t
val waiting_create : ?abort:unit Import.Deferred.t ->
       ?message:string -> string -> unit Import.Deferred.t
val unlock_exn : string -> unit Import.Deferred.t
val critical_section : ?message:string ->
       string ->
       abort:unit Import.Deferred.t ->
       f:(unit -> 'a Import.Deferred.t) -> 'a Import.Deferred.t
val get_hostname_and_pid : string -> (string * Core.Std.Pid.t) option Import.Deferred.t
val get_message : string -> string option Import.Deferred.t