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;;; Copyright (c) 2009, Volkan YAZICI <volkan.yazici@gmail.com>
;;; All rights reserved.
;;; Redistribution and use in source and binary forms, with or without
;;; modification, are permitted provided that the following conditions are met:
;;; - Redistributions of source code must retain the above copyright notice,
;;; this list of conditions and the following disclaimer.
;;; - Redistributions in binary form must reproduce the above copyright notice,
;;; this list of conditions and the following disclaimer in the documentation
;;; and/or other materials provided with the distribution.
;;; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
;;; AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
;;; IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
;;; ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
;;; LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
;;; CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
;;; SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
;;; INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
;;; CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
;;; ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
;;; POSSIBILITY OF SUCH DAMAGE.
(in-package :patron)
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
;;; Management Routines
;;;
(defun rotate-patron-state (patron target-state)
"Switches `STATE' slot of `PATRON' to specified `TARGET-STATE'."
(with-lock (state-lock-of patron)
(assert
(eql (state-of patron)
(ecase target-state
(:inactive :active)
(:active :inactive))))
(setf (state-of patron) target-state)))
(defun start-patron (patron)
"After switching `STATE' to `:ACTIVE', starts `WORKERS's and `KEEPER's in
order."
(prog1 patron
(rotate-patron-state patron :active)
(start-workers patron)
(start-keepers patron)))
(defun stop-patron (patron &key wait kill)
"After switching `STATE' to `:INACTIVE', stops `KEEPER's and `WORKER's in
order. For related effects of keyword arguments see documentation of
`STOP-KEEPERS' and `STOP-WORKERS' functions."
(prog1 patron
(rotate-patron-state patron :inactive)
(stop-keepers patron :wait wait)
(stop-workers patron :wait wait :kill kill)))
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