module Checked_out_entry : sig ... endA spooled entry that is checked out, independent of any particular queue. No
other process using this interface will be able to interfere with a
Checked_out_entry.t (unlike an Entry.t, which may be stolen out from under
you).
val checkout : Entry.t ‑> Checked_out_entry.t Async.Deferred.Or_error.tCheck out an Entry.t. Use checkout if you expect to be the only user of an
Entry.t and it is an error if the Entry.t is grabbed by another process (or does
not exist). See with_entry for a higher-level interface.
val checkout' : Entry.t ‑> [ `Not_found | `Ok of Checked_out_entry.t ] Async.Deferred.Or_error.tCheck out an Entry.t. Use checkout' if you expect that another process might
race to grab an Entry.t. See with_entry' for a higher-level interface.
module Queue_reader : sig ... end