| Allegro CL version 8.2 Unrevised from 8.1 to 8.2. 8.1 version |
The symbol sys:*current-thread*
names a
symbol-macro which when executed returns the current thread. Note,
despite being called a "variable", this symbol does not have a
value. Evaluating the symbol results in the current thread as a return
value, but applying boundp to
this symbol returns nil
and applying symbol-value to it results in an
error. (We call it a "variable" because we do not really have a
documentation category that fits it otherwise.)
sys:*current-thread*
is implemented as a symbol-macro because doing so is much more
efficient, getting the value in just several instructions without even
needing, on some platforms, a memory reference.
The distinction between thread and process is arcane, but the most important thing is this:
See also *current-process*
.
See multiprocessing.htm
for more information on multiprocessing.
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 |