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gdatalist: remove restriction of number of keys in g_datalist_id_remove_multiple()

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If too many keys are requested, they temporary buffer is allocated
on the heap. There is no problem in principle, to remove more than
16 keys.

Well, the problem is that GData tracks entries in a linear list, so
performance will degrade when it grows too much. That is a problem,
and users should be careful to not add unreasonably many keys. But it's
not the task of g_datalist_id_remove_multiple() to decide what is
reasonable.

This limitation was present from the beginning, in commit 0415bf9412
('Add g_datalist_id_remove_multiple'). It's no longer necessary since
commit eada6be364 ('gdataset: cleanup g_data_remove_internal()').
This commit is contained in:
Thomas Haller 2024-02-02 19:52:55 +01:00
parent 48a1d8c695
commit 759ebf3663
2 changed files with 5 additions and 4 deletions
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8
glib/gdataset.c
View File

@ -736,13 +736,17 @@ g_datalist_id_set_data_full (GData **datalist,
* g_datalist_id_remove_multiple: * g_datalist_id_remove_multiple:
* @datalist: a datalist * @datalist: a datalist
* @keys: (array length=n_keys): keys to remove * @keys: (array length=n_keys): keys to remove
* @n_keys: length of @keys, must be <= 16 * @n_keys: length of @keys.
* *
* Removes multiple keys from a datalist. * Removes multiple keys from a datalist.
* *
* This is more efficient than calling g_datalist_id_remove_data() * This is more efficient than calling g_datalist_id_remove_data()
* multiple times in a row. * multiple times in a row.
* *
* Before 2.80, @n_keys had to be not larger than 16. Now it can be larger, but
* note that GData does a linear search, so an excessive number of keys will
* perform badly.
*
* Since: 2.74 * Since: 2.74
*/ */
void void
@ -750,8 +754,6 @@ g_datalist_id_remove_multiple (GData **datalist,
GQuark *keys, GQuark *keys,
gsize n_keys) gsize n_keys)
{ {
g_return_if_fail (n_keys <= 16);
g_data_remove_internal (datalist, keys, n_keys); g_data_remove_internal (datalist, keys, n_keys);
} }

1
glib/tests/dataset.c
View File

@ -347,7 +347,6 @@ test_datalist_id_remove_multiple_resize (void)
break; break;
case 3: case 3:
/* Mode: remove a list of (random) quarks. */ /* Mode: remove a list of (random) quarks. */
n = n % 16;
for (i = 0; i < n; i++) for (i = 0; i < n; i++)
{ {
j = (j + PRIME) % N; j = (j + PRIME) % N;