Example Count

Jan Burse, created Oct 19. 2018
* Prolog code for the port statistics without call-site information.
* The following data will be gathered:
* count(Fun, Arity, CallExitRedoFail).
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% count(Fun, Arity, CallExitRedoFail)
:- dynamic count/3.
% remove_count
retract(count(_, _, _)), fail.
% add_count(+CallExitRedoFail, +CallExitRedoFail, -CallExitRedoFail)
add_count(A-B-C-D, E-F-G-H, R-S-T-U) :-
R is A+E,
S is B+F,
T is C+G,
U is D+H.
% update_count(+Fun, +Arity, +CallExitRedoFail)
update_count(F, A, D) :-
retract(count(F, A, R)), !,
add_count(R, D, S),
assertz(count(F, A, S)).
update_count(F, A, D) :-
assertz(count(F, A, D)).
% get_delta(+Port, -CallExitRedoFail)
get_delta(call, 1-0-0-0).
get_delta(exit, 0-1-0-0).
get_delta(redo, 0-0-1-0).
get_delta(fail, 0-0-0-1).
% goal_tracing(+Port, +Frame)
:- multifile goal_tracing/2.
frame_property(Q, sys_call_goal(G)),
functor(G, F, A),
get_delta(P, D),
update_count(F, A, D).
% show
write('Pred\tCall\tExit\tRedo\tFail'), nl,
count(F, A, R-S-T-U),
% reset