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tests: Add test for G_ALIGNOF()

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To guarantee that its behaviour is always the same as the
G_STRUCT_OFFSET fallback.

Signed-off-by: Philip Withnall <withnall@endlessm.com>

https://gitlab.gnome.org/GNOME/glib/issues/1055
This commit is contained in:
Philip Withnall 2018-12-21 13:22:55 +00:00
parent b7d2eeed17
commit ab56f0459c
3 changed files with 55 additions and 0 deletions
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1
glib/tests/Makefile.am
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@ -70,6 +70,7 @@ test_programs = \
keyfile \
list \
logging \
macros \
mainloop \
mappedfile \
markup \

53
glib/tests/macros.c Normal file
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@ -0,0 +1,53 @@
/* GLib testing framework examples and tests
*
* Copyright © 2018 Endless Mobile, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General
* Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
*
* Author: Philip Withnall <withnall@endlessm.com>
*/
#include <glib.h>
/* Test G_ALIGNOF() gives the same results as the G_STRUCT_OFFSET fallback. This
* should be the minimal alignment for the given type.
*
* This is necessary because the implementation of G_ALIGNOF() varies depending
* on the compiler in use. We want all implementations to be consistent.
*
* In the case that the compiler uses the G_STRUCT_OFFSET fallback, this test
* is a no-op. */
static void
test_alignof_fallback (void)
{
#define check_alignof(type) \
g_assert_cmpint (G_ALIGNOF (type), ==, G_STRUCT_OFFSET (struct { char a; type b; }, b))
check_alignof (char);
check_alignof (int);
check_alignof (float);
check_alignof (double);
check_alignof (struct { char a; int b; });
}
int
main (int argc,
char *argv[])
{
g_test_init (&argc, &argv, NULL);
g_test_add_func ("/alignof/fallback", test_alignof_fallback);
return g_test_run ();
}

1
glib/tests/meson.build
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@ -38,6 +38,7 @@ glib_tests = {
'keyfile' : {},
'list' : {},
'logging' : {},
'macros' : {},
'mainloop' : {},
'mappedfile' : {},
'markup' : {},