contrib/sb-bsd-sockets/misc.lisp

   1 (in-package :sb-bsd-sockets)
   2
   3 ;;; Miscellaneous things, placed here until I can find a logically more
   4 ;;; coherent place to put them
   5
   6 ;;; I don't want to provide a complete interface to unix file
   7 ;;; operations, for example, but being about to set O_NONBLOCK on a
   8 ;;; socket is a necessary operation.
   9
  10 ;;; XXX bad (sizeof (int) ==4 ) assumptions
  11
  12 (defgeneric non-blocking-mode (socket)
  13   (:documentation "Is SOCKET in non-blocking mode?"))
  14
  15 #-win32
  16 (defmethod non-blocking-mode ((socket socket))
  17   (let ((fd (socket-file-descriptor socket)))
  18     (sb-alien:with-alien ((arg integer))
  19                          (> (logand
  20                              (sockint::fcntl fd sockint::f-getfl arg)
  21                              sockint::o-nonblock)
  22                             0))))
  23
  24 #+win32
  25 (defmethod non-blocking-mode ((socket socket)) 0)
  26
  27 (defgeneric (setf non-blocking-mode) (non-blocking-p socket)
  28   (:documentation "Put SOCKET in non-blocking mode - or not, according to NON-BLOCKING-P"))
  29
  30 #-win32
  31 (defmethod (setf non-blocking-mode) (non-blocking-p (socket socket))
  32   (declare (optimize (speed 3)))
  33   (let* ((fd (socket-file-descriptor socket))
  34          (arg1 (the (signed-byte 32) (sockint::fcntl fd sockint::f-getfl 0)))
  35          (arg2
  36           (if non-blocking-p
  37               (logior arg1 sockint::o-nonblock)
  38             (logand (lognot sockint::o-nonblock) arg1))))
  39     (when (= (the (signed-byte 32) -1)
  40              (the (signed-byte 32)
  41                (sockint::fcntl fd sockint::f-setfl arg2)))
  42       (socket-error "fcntl"))
  43     non-blocking-p))
  44
  45 #+win32
  46 (defmethod (setf non-blocking-mode) (non-blocking-p (socket socket)) 0)
  47 ;;  (sb-alien:with-alien ((mode (unsigned 32)))
  48 ;;    (if non-blocking-p (setf mode 1))
  49 ;;       (ioctlsocket socket FIONBIO mode)))
  50