Files
mercury/tests/trailing/test_trail_reset.m
Zoltan Somogyi fdd141bf77 Clean up the tests in the other test directories.
tests/invalid/*.{m,err_exp}:
tests/misc_tests/*.m:
tests/mmc_make/*.m:
tests/par_conj/*.m:
tests/purity/*.m:
tests/stm/*.m:
tests/string_format/*.m:
tests/structure_reuse/*.m:
tests/submodules/*.m:
tests/tabling/*.m:
tests/term/*.m:
tests/trailing/*.m:
tests/typeclasses/*.m:
tests/valid/*.m:
tests/warnings/*.{m,exp}:
    Make these tests use four-space indentation, and ensure that
    each module is imported on its own line. (I intend to use the latter
    to figure out which subdirectories' tests can be executed in parallel.)

    These changes usually move code to different lines. For the tests
    that check compiler error messages, expect the new line numbers.

browser/cterm.m:
browser/tree234_cc.m:
    Import only one module per line.

tests/hard_coded/boyer.m:
    Fix something I missed.
2015-02-16 12:32:18 +11:00

80 lines
1.4 KiB
Mathematica

% vim: ft=mercury ts=4 et
:- module test_trail_reset.
:- interface.
:- import_module io.
:- pred main(io::di, io::uo) is det.
:- implementation.
:- import_module int.
main(!IO) :-
( test(10, _) ->
io.write_string("Call to test/1 succeeded\n", !IO)
;
io.write_string("Call to test/1 failed\n", !IO)
),
reset_trail(!IO).
:- pred test(int::in, int::out) is semidet.
test(X, 3) :-
add_trail_entry(X),
add_trail_entry(X + 1).
:- pragma foreign_decl("C", "
#include \"mercury_trail.h\"
#include <stdio.h>
extern void
foo(void *, MR_untrail_reason);
").
:- pred add_trail_entry(int::in) is semidet.
:- pragma foreign_proc("C",
add_trail_entry(X::in),
[will_not_call_mercury, promise_pure, thread_safe],
"
MR_trail_function(foo, (void *) X);
SUCCESS_INDICATOR = MR_TRUE;
").
:- pred reset_trail(io::di, io::uo) is det.
:- pragma foreign_proc("C",
reset_trail(IO0::di, IO::uo),
[will_not_call_mercury, promise_pure, thread_safe],
"
MR_reset_trail();
IO = IO0;
").
:- pragma foreign_code("C", "
void
foo(void *value, MR_untrail_reason reason)
{
printf(\"calling function trail entry with %ld: \",
(long) value);
switch (reason) {
case MR_commit:
printf(\"commit\\n\");
break;
case MR_gc:
printf(\"gc\\n\");
break;
default:
printf(\"unexpected trail reason\");
}
}
").