start-customs

Arguments: &optional name

Used in versions that use the :os-threads multiprocessing model only. The symbol naming this function does not exist in versions that use the non :os-threads model. Conditionalize with #+os-threads.

If non-lisp threads are going to use callback functions to invoke lisp code, then a "customs" process must be running to assign each such thread a lisp process, when the thread first tries to invoke lisp code. start-customs starts such a process. The name argument, if present, must be a valid name argument to make-process; if omitted it defaults to "Customs". Starting more than one customs process is inefficient, but not fatal. start-customs checks to see if a process with the specified name already exists; if so it does nothing. Otherwise start-customs creates a process that waits for non-lisp threads to appear and then calls make-immigrant-process to give them the lisp structure they need to run in the lisp world.

See multiprocessing.htm for general information on multiprocessing in Allegro CL.

Copyright (c) 1998-2002, Franz Inc. Oakland, CA., USA. All rights reserved.
Documentation for Allegro CL version 6.2. This page was not revised from the 6.1 page.
Created 2002.2.26.