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Merge branch 'final-type-check-2' into 'main'

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gtype: Speed up type checking for final types

See merge request GNOME/glib!2728
This commit is contained in:
Philip Withnall 2022-12-13 12:49:23 +00:00
commit 4ffb320e37
2 changed files with 92 additions and 9 deletions
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44
gobject/gtype.c
View File

@ -146,6 +146,13 @@
G_TYPE_FLAG_DERIVABLE | \
G_TYPE_FLAG_DEEP_DERIVABLE)
#define TYPE_FLAG_MASK (G_TYPE_FLAG_ABSTRACT | G_TYPE_FLAG_VALUE_ABSTRACT | G_TYPE_FLAG_FINAL | G_TYPE_FLAG_DEPRECATED)
/* List the flags that are directly accessible via the TypeNode struct flags */
#define NODE_FLAG_MASK ( \
G_TYPE_FLAG_CLASSED | \
G_TYPE_FLAG_INSTANTIATABLE | \
G_TYPE_FLAG_FINAL)
#define SIZEOF_FUNDAMENTAL_INFO ((gssize) MAX (MAX (sizeof (GTypeFundamentalInfo), \
sizeof (gpointer)), \
sizeof (glong)))
@ -233,7 +240,9 @@ 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;
@ -788,6 +797,13 @@ check_derivation_I (GType parent_type,
type_descriptive_name_I (parent_type));
return FALSE;
}
if (pnode->is_final)
{
g_critical ("cannot derive '%s' from final parent type '%s'",
type_name,
NODE_NAME (pnode));
return FALSE;
}
finfo = type_node_fundamental_info_I (pnode);
/* ensure flat derivability */
if (!(finfo->type_flags & G_TYPE_FLAG_DERIVABLE))
@ -806,13 +822,6 @@ check_derivation_I (GType parent_type,
NODE_NAME (pnode));
return FALSE;
}
if ((G_TYPE_FLAG_FINAL & GPOINTER_TO_UINT (type_get_qdata_L (pnode, static_quark_type_flags))) == G_TYPE_FLAG_FINAL)
{
g_critical ("cannot derive '%s' from final parent type '%s'",
type_name,
NODE_NAME (pnode));
return FALSE;
}
return TRUE;
}
@ -3909,6 +3918,8 @@ 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;
}
/**
@ -3990,6 +4001,20 @@ g_type_test_flags (GType type,
node = lookup_type_node_I (type);
if (node)
{
if ((flags & ~NODE_FLAG_MASK) == 0)
{
if (flags & G_TYPE_FLAG_CLASSED)
result |= node->is_classed;
if (flags & G_TYPE_FLAG_INSTANTIATABLE)
result |= node->is_instantiatable;
if (flags & G_TYPE_FLAG_FINAL)
result |= node->is_final;
return result;
}
guint fflags = flags & TYPE_FUNDAMENTAL_FLAG_MASK;
guint tflags = flags & TYPE_FLAG_MASK;
@ -4135,8 +4160,11 @@ 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;

55
gobject/tests/type-flags.c
View File

@ -61,6 +61,22 @@ test_type_flags_final (void)
{
GType final2_type;
g_assert_true (G_TYPE_IS_FINAL (TEST_TYPE_FINAL));
g_assert_true (g_type_test_flags (TEST_TYPE_FINAL, G_TYPE_FLAG_FINAL));
g_assert_true (G_TYPE_IS_CLASSED (TEST_TYPE_FINAL));
g_assert_true (g_type_test_flags (TEST_TYPE_FINAL, G_TYPE_FLAG_CLASSED));
g_assert_true (G_TYPE_IS_INSTANTIATABLE (TEST_TYPE_FINAL));
g_assert_true (g_type_test_flags (TEST_TYPE_FINAL, G_TYPE_FLAG_INSTANTIATABLE));
g_assert_true (g_type_test_flags (TEST_TYPE_FINAL,
G_TYPE_FLAG_FINAL |
G_TYPE_FLAG_CLASSED |
G_TYPE_FLAG_INSTANTIATABLE));
g_assert_false (g_type_test_flags (TEST_TYPE_FINAL,
G_TYPE_FLAG_FINAL |
G_TYPE_FLAG_CLASSED |
G_TYPE_FLAG_DEPRECATED |
G_TYPE_FLAG_INSTANTIATABLE));
/* This is the message we print out when registering the type */
g_test_expect_message ("GLib-GObject", G_LOG_LEVEL_CRITICAL,
"*cannot derive*");
@ -102,6 +118,22 @@ test_deprecated_init (TestDeprecated *self)
{
}
static void
test_type_flags_final_instance_check (void)
{
TestFinal *final;
final = g_object_new (TEST_TYPE_FINAL, NULL);
g_assert_true (g_type_check_instance_is_a ((GTypeInstance *) final,
TEST_TYPE_FINAL));
g_assert_false (g_type_check_instance_is_a ((GTypeInstance *) final,
TEST_TYPE_DEPRECATED));
g_assert_true (g_type_check_instance_is_a ((GTypeInstance *) final,
G_TYPE_OBJECT));
g_clear_object (&final);
}
static void
test_type_flags_deprecated (void)
{
@ -119,6 +151,21 @@ test_type_flags_deprecated (void)
g_assert_false (deprecated_type == G_TYPE_INVALID);
g_assert_true (G_TYPE_IS_DEPRECATED (deprecated_type));
g_assert_true (G_TYPE_IS_FINAL (deprecated_type));
g_assert_true (g_type_test_flags (deprecated_type, G_TYPE_FLAG_FINAL));
g_assert_true (g_type_test_flags (deprecated_type,
G_TYPE_FLAG_DEPRECATED |
G_TYPE_FLAG_CLASSED |
G_TYPE_FLAG_FINAL |
G_TYPE_FLAG_INSTANTIATABLE));
g_assert_false (g_type_test_flags (deprecated_type,
G_TYPE_FLAG_DEPRECATED |
G_TYPE_FLAG_CLASSED |
G_TYPE_FLAG_FINAL |
G_TYPE_FLAG_ABSTRACT |
G_TYPE_FLAG_INSTANTIATABLE));
/* Instantiating it should work, but emit a warning. */
deprecated_object = g_object_new (deprecated_type, NULL);
g_assert_nonnull (deprecated_object);
@ -131,6 +178,13 @@ test_type_flags_deprecated (void)
deprecated_object = g_object_new (deprecated_type, NULL);
g_assert_nonnull (deprecated_object);
g_assert_true (g_type_check_instance_is_a ((GTypeInstance *) deprecated_object,
TEST_TYPE_DEPRECATED));
g_assert_true (g_type_check_instance_is_a ((GTypeInstance *) deprecated_object,
G_TYPE_OBJECT));
g_assert_false (g_type_check_instance_is_a ((GTypeInstance *) deprecated_object,
TEST_TYPE_FINAL));
g_test_assert_expected_messages ();
g_object_unref (deprecated_object);
@ -144,6 +198,7 @@ main (int argc, char *argv[])
g_setenv ("G_ENABLE_DIAGNOSTIC", "1", TRUE);
g_test_add_func ("/type/flags/final", test_type_flags_final);
g_test_add_func ("/type/flags/final/instance-check", test_type_flags_final_instance_check);
g_test_add_func ("/type/flags/deprecated", test_type_flags_deprecated);
return g_test_run ();