Identifies forms which should not be preempted during execution, in non-SMP LispWorks only
without-preemption &rest body => result
The forms to be evaluated atomically.
The result of executing body.
Identifies forms which should not be preempted during execution.
without-preemption is not supported in SMP LispWorks, that is on Microsoft Windows, Mac OS X, Linux, FreeBSD and x86/x64 Solaris platforms.
LispWorks User Guide and Reference Manual - 13 Feb 2015