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(************************************************************************)
(* * The Coq Proof Assistant / The Coq Development Team *)
(* v * INRIA, CNRS and contributors - Copyright 1999-2018 *)
(* <O___,, * (see CREDITS file for the list of authors) *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(* * (see LICENSE file for the text of the license) *)
(************************************************************************)
type worker_id = string
type 'a cpanel = {
exit : unit -> unit; (* called by manager to exit instead of Thread.exit *)
cancelled : unit -> bool; (* manager checks for a request of termination *)
extra : 'a; (* extra stuff to pass to the manager *)
}
module type PoolModel = sig
(* this shall come from a Spawn.* model *)
type process
val spawn : int -> worker_id * process * CThread.thread_ic * out_channel
(* this defines the main loop of the manager *)
type extra
val manager :
extra cpanel -> worker_id * process * CThread.thread_ic * out_channel -> unit
end
module Make(Model : PoolModel) : sig
type pool
val create : Model.extra -> size:int -> pool
val is_empty : pool -> bool
val n_workers : pool -> int
(* cancel signal *)
val cancel : worker_id -> pool -> unit
val cancel_all : pool -> unit
(* camcel signal + true removal, the pool is empty afterward *)
val destroy : pool -> unit
(* The worker should call this function *)
val worker_handshake : CThread.thread_ic -> out_channel -> unit
end
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