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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)
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
;;; Semaphore Abstraction Layer
;;;
(defun semaphore-wait (semaphore)
#+ccl (ccl:wait-on-semaphore semaphore)
#+sbcl (sb-thread:wait-on-semaphore semaphore)
#-(or ccl sbcl) (error "`SEMAPHORE-WAIT' is not supported!"))
(defun semaphore-timed-wait (semaphore duration)
#+ccl (ccl:timed-wait-on-semaphore semaphore duration)
#+sbcl (handler-case
(sb-ext:with-timeout duration
(sb-thread:wait-on-semaphore semaphore))
(sb-ext:timeout ()))
#-(or ccl sbcl) (error "`SEMAPHORE-TIMED-WAIT' is not supported!"))
(defun semaphore-signal (semaphore)
#+ccl (ccl:signal-semaphore semaphore)
#+sbcl (sb-thread:signal-semaphore semaphore)
#-(or ccl sbcl) (error "`SEMAPHORE-SIGNAL' is not supported!"))
(defun semaphore-make (&optional (count 0))
(prog1-let
(semaphore
#+ccl (ccl:make-semaphore)
#+sbcl (sb-thread:make-semaphore)
#-(or ccl sbcl) (error "`MAKE-SEMAPHORE' is not supported!"))
(loop repeat count do (semaphore-signal semaphore))))
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