/usr/share/Yap/timeout.yap is in yap 6.2.2-6.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* *
* YAP Prolog *
* *
* Yap Prolog was developed at NCCUP - Universidade do Porto *
* *
* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
* *
**************************************************************************
* *
* File: timeout.yap *
* Last rev: 5/12/99 *
* mods: *
* comments: Goal within timeout *
* *
*************************************************************************/
:- module(timeout, [
time_out/3
]).
:- meta_predicate time_out(0,+,-).
:- use_module(library(hacks), [
virtual_alarm/3
]).
%
% not the nicest program I've ever seen.
%
time_out(Goal, Time, Result) :-
T is Time//1000,
UT is (Time mod 1000)*1000,
catch( ( Result0 = success,
setup_call_cleanup(
virtual_alarm(T.UT,throw(time_out),_),
Goal,
virtual_alarm(0,_,RT)),
( var(RT)
-> virtual_alarm(0,_,_),
(
true
;
virtual_alarm(T.UT,throw(time_out),_),
fail
)
; true
)
),
time_out,
Result0 = time_out ),
Result = Result0.
|