src/code/misc-aliens.lisp

   1 ;;;; assorted alien definitions
   2
   3 ;;;; This software is part of the SBCL system. See the README file for
   4 ;;;; more information.
   5 ;;;;
   6 ;;;; This software is derived from the CMU CL system, which was
   7 ;;;; written at Carnegie Mellon University and released into the
   8 ;;;; public domain. The software is in the public domain and is
   9 ;;;; provided with absolutely no warranty. See the COPYING and CREDITS
  10 ;;;; files for more information.
  11
  12 (in-package "SB!IMPL")
  13
  14 (declaim (inline memmove))
  15 (define-alien-routine ("memmove" memmove) void
  16   (dest (* char))
  17   (src (* char))
  18   (n unsigned-int))
  19
  20 (define-alien-routine ("os_get_errno" get-errno) integer)
  21 (setf (fdocumentation 'get-errno 'function)
  22       "Return the value of the C library pseudo-variable named \"errno\".")
  23
  24 ;;; Decode errno into a string.
  25 (defun strerror (&optional (errno (get-errno)))
  26   (alien-funcall (extern-alien "strerror" (function c-string int)) errno))