| Allegro CL version 8.2 Unrevised from 8.1 to 8.2. 8.1 version |
Arguments: name &optional index-or-reuse convert-to-c-types
The name argument must be a symbol defined with defun-foreign-callable.
The index-or-reuse argument can be a
fixnum to select a specific table entry to replace, or the symbol
:reuse
to specify that if a function with the same
name is already registered, the function will be replaced at the same
index.
If convert-to-c-types is specified, then
an attempt will be made to convert the return value to a foreign
value, otherwise the return value is returned unchanged. It is
important to note that though the default is nil
, most often the desired effect is obtained by
setting this option to t
. The default of
nil
is retained for compatibility
reasons. This is described in a little more detail in the description
of defun-foreign-callable.
This function returns 5 values:
In versions using the :os-threads model of multiprocessing, the callback from foreign code to the foreign-callable function name may be made from a thread started outside Lisp. This is not supported in a version of Lisp using the non :os-threads model of multiprocessing. trying it will likely cause Lisp to fail. See Foreign functions and multiprocessing in foreign-functions.htm.
See ftype.htm for information on foreign types in Allegro CL and foreign-functions.htm for general information on foreign functions in Allegro CL.
Copyright (c) 1998-2016, Franz Inc. Oakland, CA., USA. All rights reserved.
This page was not revised from the 8.1 page.
Created 2010.1.21.
| Allegro CL version 8.2 Unrevised from 8.1 to 8.2. 8.1 version |