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gtype: Speed up type checking for final types

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Store the final flag directly in the TypeNode,
so we can get it cheaply, and use it to speed
up g_type_instance_is_a for final types.
This commit is contained in:
Matthias Clasen 2022-06-06 17:26:38 -04:00 committed by Marco Trevisan (Treviño)
parent 6a0591f06c
commit a31b042dfc
1 changed files with 9 additions and 2 deletions
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11
gobject/gtype.c
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@ -233,7 +233,9 @@ struct _TypeNode
guint n_prerequisites : 9;
guint is_classed : 1;
guint is_instantiatable : 1;
guint is_final : 1;
guint mutatable_check_cache : 1; /* combines some common path checks */
GType *children; /* writable with lock */
TypeData *data;
GQuark qname;
@ -3909,6 +3911,8 @@ type_add_flags_W (TypeNode *node,
dflags = GPOINTER_TO_UINT (type_get_qdata_L (node, static_quark_type_flags));
dflags |= flags;
type_set_qdata_W (node, static_quark_type_flags, GUINT_TO_POINTER (dflags));
node->is_final = (flags & G_TYPE_FLAG_FINAL) != 0;
}
/**
@ -4134,9 +4138,12 @@ g_type_check_instance_is_a (GTypeInstance *type_instance,
if (!type_instance || !type_instance->g_class)
return FALSE;
node = lookup_type_node_I (type_instance->g_class->g_type);
iface = lookup_type_node_I (iface_type);
if (iface->is_final)
return type_instance->g_class->g_type == iface_type;
node = lookup_type_node_I (type_instance->g_class->g_type);
check = node && node->is_instantiatable && iface && type_node_conforms_to_U (node, iface, TRUE, FALSE);
return check;