SWI-Prolog -- halt/0

Availability:built-in

[ISO]halt

Terminate Prolog execution. Open files are closed, and if the command line option -tty is not active the terminal status (see Unix stty(1)) is restored. Hooks may be registered both in Prolog and in foreign code. Prolog hooks are registered using at_halt/1. halt/0 is equivalent to halt(0).^{bugIn
the multithreaded version, halt/0
does not work when not called from the main thread. In the
current system a permission_error exception is raised.
Future versions may enable halt/0
from any thread.}