set-timeouts.lisp

   1 ;;; -*- Mode: LISP; Syntax: COMMON-LISP; Package: CL-USER; Base: 10 -*-
   2
   3 ;;; Copyright (c) 2004-2010, Dr. Edmund Weitz.  All rights reserved.
   4
   5 ;;; Redistribution and use in source and binary forms, with or without
   6 ;;; modification, are permitted provided that the following conditions
   7 ;;; are met:
   8
   9 ;;;   * Redistributions of source code must retain the above copyright
  10 ;;;     notice, this list of conditions and the following disclaimer.
  11
  12 ;;;   * Redistributions in binary form must reproduce the above
  13 ;;;     copyright notice, this list of conditions and the following
  14 ;;;     disclaimer in the documentation and/or other materials
  15 ;;;     provided with the distribution.
  16
  17 ;;; THIS SOFTWARE IS PROVIDED BY THE AUTHOR 'AS IS' AND ANY EXPRESSED
  18 ;;; OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  19 ;;; WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20 ;;; ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  21 ;;; DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22 ;;; DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
  23 ;;; GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  24 ;;; INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  25 ;;; WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  26 ;;; NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  27 ;;; SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28
  29 (in-package :hunchentoot)
  30
  31 (defun set-timeouts (usocket read-timeout write-timeout)
  32   "Sets up timeouts on the given USOCKET object.  READ-TIMEOUT is the
  33 read timeout period, WRITE-TIMEOUT is the write timeout, specified in
  34 \(fractional) seconds.  The timeouts can either be implemented using
  35 the low-level socket options SO_RCVTIMEO and SO_SNDTIMEO or some
  36 other, implementation specific mechanism.  On platforms that do not
  37 support separate read and write timeouts, both must be equal or an
  38 error will be signaled.  READ-TIMEOUT and WRITE-TIMEOUT may be NIL,
  39 which means that the corresponding socket timeout value will not be
  40 set."
  41   (declare (ignorable usocket read-timeout write-timeout))
  42   ;; add other Lisps here if necessary
  43   #+(or :sbcl :cmu)
  44   (unless (eql read-timeout write-timeout)
  45     (parameter-error "Read and write timeouts for socket must be equal."))
  46   #+:clisp
  47   (when read-timeout
  48     (socket:socket-options (usocket:socket usocket) :SO-RCVTIMEO read-timeout))
  49   #+:clisp
  50   (when write-timeout
  51     (socket:socket-options (usocket:socket usocket) :SO-SNDTIMEO write-timeout))
  52   #+:ecl
  53   (when read-timeout
  54     (print (list (usocket:socket usocket) read-timeout))
  55     (setf (sb-bsd-sockets:sockopt-receive-timeout (usocket:socket usocket))
  56           read-timeout))
  57   #+:ecl
  58   (when write-timeout
  59     (print (list (usocket:socket usocket) write-timeout))
  60     (setf (sb-bsd-sockets:sockopt-send-timeout (usocket:socket usocket))
  61           write-timeout))
  62   #+:openmcl
  63   (when read-timeout
  64     (setf (ccl:stream-input-timeout (usocket:socket usocket))
  65           read-timeout))
  66   #+:openmcl
  67   (when write-timeout
  68     (setf (ccl:stream-output-timeout (usocket:socket usocket))
  69           write-timeout))
  70   #+:sbcl
  71   (when read-timeout
  72     (setf (sb-impl::fd-stream-timeout (usocket:socket-stream usocket))
  73           (coerce read-timeout 'single-float)))
  74   #+:cmu
  75   (setf (lisp::fd-stream-timeout (usocket:socket-stream usocket))
  76         (coerce read-timeout 'integer))
  77   #-(or :clisp :allegro :openmcl :sbcl :lispworks :cmu :ecl)
  78   (not-implemented 'set-timeouts))
  79