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hbitmap: add next_zero function

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The function searches for next zero bit.
Also add interface for BdrvDirtyBitmap and unit test.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Message-id: 20171012135313.227864-2-vsementsov@virtuozzo.com
Signed-off-by: Jeff Cody <jcody@redhat.com>
This commit is contained in:
Vladimir Sementsov-Ogievskiy 2017-10-12 16:53:09 +03:00 • committed by Jeff Cody
parent 411ad78115
commit 56207df55e
5 changed files with 114 additions and 0 deletions
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61
tests/test-hbitmap.c
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@ -925,6 +925,61 @@ static void test_hbitmap_iter_and_reset(TestHBitmapData *data,
hbitmap_iter_next(&hbi);
}
static void test_hbitmap_next_zero_check(TestHBitmapData *data, int64_t start)
{
int64_t ret1 = hbitmap_next_zero(data->hb, start);
int64_t ret2 = start;
for ( ; ret2 < data->size && hbitmap_get(data->hb, ret2); ret2++) {
;
}
if (ret2 == data->size) {
ret2 = -1;
}
g_assert_cmpint(ret1, ==, ret2);
}
static void test_hbitmap_next_zero_do(TestHBitmapData *data, int granularity)
{
hbitmap_test_init(data, L3, granularity);
test_hbitmap_next_zero_check(data, 0);
test_hbitmap_next_zero_check(data, L3 - 1);
hbitmap_set(data->hb, L2, 1);
test_hbitmap_next_zero_check(data, 0);
test_hbitmap_next_zero_check(data, L2 - 1);
test_hbitmap_next_zero_check(data, L2);
test_hbitmap_next_zero_check(data, L2 + 1);
hbitmap_set(data->hb, L2 + 5, L1);
test_hbitmap_next_zero_check(data, 0);
test_hbitmap_next_zero_check(data, L2 + 1);
test_hbitmap_next_zero_check(data, L2 + 2);
test_hbitmap_next_zero_check(data, L2 + 5);
test_hbitmap_next_zero_check(data, L2 + L1 - 1);
test_hbitmap_next_zero_check(data, L2 + L1);
hbitmap_set(data->hb, L2 * 2, L3 - L2 * 2);
test_hbitmap_next_zero_check(data, L2 * 2 - L1);
test_hbitmap_next_zero_check(data, L2 * 2 - 2);
test_hbitmap_next_zero_check(data, L2 * 2 - 1);
test_hbitmap_next_zero_check(data, L2 * 2);
test_hbitmap_next_zero_check(data, L3 - 1);
hbitmap_set(data->hb, 0, L3);
test_hbitmap_next_zero_check(data, 0);
}
static void test_hbitmap_next_zero_0(TestHBitmapData *data, const void *unused)
{
test_hbitmap_next_zero_do(data, 0);
}
static void test_hbitmap_next_zero_4(TestHBitmapData *data, const void *unused)
{
test_hbitmap_next_zero_do(data, 4);
}
int main(int argc, char **argv)
{
g_test_init(&argc, &argv, NULL);
@ -985,6 +1040,12 @@ int main(int argc, char **argv)
hbitmap_test_add("/hbitmap/iter/iter_and_reset",
test_hbitmap_iter_and_reset);
hbitmap_test_add("/hbitmap/next_zero/next_zero_0",
test_hbitmap_next_zero_0);
hbitmap_test_add("/hbitmap/next_zero/next_zero_4",
test_hbitmap_next_zero_4);
g_test_run();
return 0;