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Merge branch 'wip/chergert/g_variant_ref_sink-perf' into 'main'

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glib/gvariant: skip bitlock for g_variant_ref_sink()

See merge request GNOME/glib!4302
This commit is contained in:
Philip Withnall 2024-09-25 13:21:56 +00:00
commit 5ac765689c
1 changed files with 12 additions and 7 deletions
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19
glib/gvariant-core.c
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@ -863,19 +863,24 @@ g_variant_ref (GVariant *value)
GVariant * GVariant *
g_variant_ref_sink (GVariant *value) g_variant_ref_sink (GVariant *value)
{ {
int old_state;
g_return_val_if_fail (value != NULL, NULL); g_return_val_if_fail (value != NULL, NULL);
g_return_val_if_fail (!g_atomic_ref_count_compare (&value->ref_count, 0), NULL); g_return_val_if_fail (!g_atomic_ref_count_compare (&value->ref_count, 0), NULL);
g_variant_lock (value);
TRACE(GLIB_VARIANT_REF_SINK(value, value->type_info, value->ref_count, value->state, value->state & STATE_FLOATING)); TRACE(GLIB_VARIANT_REF_SINK(value, value->type_info, value->ref_count, value->state, value->state & STATE_FLOATING));
if (~value->state & STATE_FLOATING) old_state = value->state;
g_variant_ref (value);
else
value->state &= ~STATE_FLOATING;
g_variant_unlock (value); while (old_state & STATE_FLOATING)
{
int new_state = old_state & ~STATE_FLOATING;
if (g_atomic_int_compare_and_exchange_full (&value->state, old_state, new_state, &old_state))
return value;
}
g_atomic_ref_count_inc (&value->ref_count);
return value; return value;
} }