Files
mercury/tests/hard_coded/io_globals_deadlock.m
Zoltan Somogyi 2bd7c5ee3e Rename X's aux modules as X_helper_N in hard_coded.
tests/hard_coded/*.m:
    Rename modules as mentioned above.

    In a few cases, where the main module's name itself had a suffix,
    such as "_mod_a" or "_main", remove that suffix. This entails
    renaming the .exp file as well. (In some cases, this meant that
    the name of a helper module was "taken over" by the main module
    of the test case.)

    Update all references to the moved modules.

    General updates to programming style, such as

    - replacing DCG notation with state var notation
    - replacing (C->T;E) with (if C then T else E)
    - moving pred/func declarations to just before their code
    - replacing io.write/io.nl sequences with io.write_line
    - replacing io.print/io.nl sequences with io.print_line
    - fixing too-long lines
    - fixing grammar errors in comments

tests/hard_coded/Mmakefile:
tests/hard_coded/Mercury.options:
    Update all references to the moved modules.

    Enable the constant_prop_int test case. The fact that it wasn't enabled
    before is probably an accident. (When constant_prop_int.m was created,
    the test case was added to a list in the Mmakefile, but that list
    was later removed due to never being referenced.)

tests/hard_coded/constant_prop_int.{m,exp}:
    Delete the calls to shift operations with negative shift amounts,
    since we have added a compile-time error for these since the test
    was originally created.
2023-06-16 08:33:22 +02:00

60 lines
1.7 KiB
Mathematica

%---------------------------------------------------------------------------%
% vim: ft=mercury ts=4 sw=4 et wm=0 tw=0
%---------------------------------------------------------------------------%
%
% Test that io.update_globals/3 does not cause a deadlock in .par grades
% if the update closure throws an exception. The initial version of
% io.update_globals/3 did *not* do this.
%
%---------------------------------------------------------------------------%
:- module io_globals_deadlock.
:- interface.
:- import_module io.
:- pred main(io::di, io::uo) is cc_multi.
:- implementation.
:- import_module exception.
:- import_module list.
:- import_module string.
:- import_module unit.
:- import_module univ.
main(!IO) :-
io.set_globals(univ(3), !IO),
try_io(update_pred_1, Result, !IO),
(
Result = succeeded(unit),
io.write_string("update_pred_1 succeeded.\n", !IO)
;
Result = exception(_),
io.write_string("update_pred_1 threw exception.\n", !IO)
),
% The following call to io.get_globals/3 will block if io.update_globals/3
% fails to reset the lock after throwing an exception.
io.get_globals(Globals, !IO),
det_univ_to_type(Globals, FinalValue),
io.format("Final value of Globals = %d\n", [i(FinalValue)], !IO).
:- pred update_pred_1(unit::out, io::di, io::uo) is det.
update_pred_1(unit, !IO) :-
io.update_globals(update_1, !IO).
:- pred update_1(univ::in, univ::out) is det.
update_1(!Univ) :-
( if univ_to_type(!.Univ, N) then
( if N = 3 then
throw("N = 3")
else
!:Univ = univ(561)
)
else
throw("cannot convert univ to integer")
).