contrib/bsd-sockets/misc.lisp

   1 (in-package :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 (defmethod non-blocking-mode ((socket socket))
  13   "Is SOCKET in non-blocking mode?"
  14   (let ((fd (socket-file-descriptor socket)))
  15     (sb-alien:with-alien ((arg integer))
  16                          (> (logand
  17                              (sockint::fcntl fd sockint::f-getfl arg)
  18                              sockint::o-nonblock)
  19                             0))))
  20
  21 (defmethod (setf non-blocking-mode) (non-blocking-p (socket socket))
  22   "Put SOCKET in non-blocking mode - or not, according to NON-BLOCKING-P"
  23   (declare (optimize (speed 3)))
  24   (let* ((fd (socket-file-descriptor socket))
  25          (arg1 (the (signed-byte 32) (sockint::fcntl fd sockint::f-getfl 0)))
  26          (arg2
  27           (if non-blocking-p
  28               (logior arg1 sockint::o-nonblock)
  29             (logand (lognot sockint::o-nonblock) arg1))))
  30     (when (= (the (signed-byte 32) -1)
  31              (the (signed-byte 32)
  32                (sockint::fcntl fd sockint::f-setfl arg2)))
  33       (socket-error "fcntl"))
  34     non-blocking-p))
  35
  36