;;; -*- Mode: LISP; Syntax: COMMON-LISP; Package: CL-USER; Base: 10 -*-
;;; $Header: /usr/local/cvsrep/hunchentoot/server.lisp,v 1.43 2008/04/09 08:17:48 edi Exp $

;;; Copyright (c) 2004-2008, Dr. Edmund Weitz.  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 AUTHOR 'AS IS' AND ANY EXPRESSED
;;; 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 AUTHOR 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,
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;;; 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 :hunchentoot)

;;; system specific implementation of the function that sets up
;;; connection timeouts

(defun set-timeouts (usocket read-timeout write-timeout)
  "Sets up timeouts on the given USOCKET object.  READ-TIMEOUT is the
read timeout period, WRITE-TIMEOUT is the write timeout, specified in
seconds.  The timeouts can either be implemented using the low-level
socket options SO_RCVTIMEO and SO_SNDTIMEO or some other,
implementation specific mechanism.  On platforms that do not support
separate read and write timeouts, both must be equal or an error will
be signaled.  READ-TIMEOUT and WRITE-TIMEOUT may be NIL, which means
that the corresponding socket timeout value will not be set."
  (declare (ignorable usocket read-timeout write-timeout))
  #+:sbcl
  ;; add other Lisps here if necessary
  (unless (eql read-timeout write-timeout)
    (error "Read and write timeouts for socket must be equal."))
  #+:clisp
  (when read-timeout
    (socket:socket-options (usocket:socket usocket) :SO-RCVTIMEO read-timeout))
  #+:clisp
  (when write-timeout
    (socket:socket-options (usocket:socket usocket) :SO-SNDTIMEO write-timeout))
  #+:openmcl
  (when read-timeout
    (setf (ccl:stream-input-timeout (usocket:socket usocket))
          read-timeout))
  #+:openmcl
  (when write-timeout
    (setf (ccl:stream-output-timeout (usocket:socket usocket))
          write-timeout))
  #+:sbcl
  (setf (sb-impl::fd-stream-timeout (usocket:socket-stream usocket))
        (coerce read-timeout 'single-float))
  #-(or :clisp :allegro :openmcl :sbcl :lispworks)
  (warn "Timeouts not implemented for ~A." (lisp-implementation-type)))