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gtype: Add check for fundamental instance type

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When checking whether an instance is of a given fundamental type (such
as G_TYPE_OBJECT), we can avoid over 60%+ of the cost of checking types.

https://bugzilla.gnome.org/show_bug.cgi?id=730984
This commit is contained in:
Edward Hervey 2014-05-28 10:57:28 +02:00 committed by Ryan Lortie
parent 03a48e1ade
commit 6072e3650f
3 changed files with 27 additions and 0 deletions
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2
docs/reference/gobject/gobject-sections.txt
View File

@ -34,6 +34,7 @@ G_TYPE_CLASS_GET_PRIVATE
G_TYPE_CHECK_INSTANCE
G_TYPE_CHECK_INSTANCE_CAST
G_TYPE_CHECK_INSTANCE_TYPE
G_TYPE_CHECK_INSTANCE_FUNDAMENTAL_TYPE
G_TYPE_CHECK_CLASS_CAST
G_TYPE_CHECK_CLASS_TYPE
G_TYPE_CHECK_VALUE
@ -125,6 +126,7 @@ G_TYPE_FUNDAMENTAL_SHIFT
g_type_check_instance
g_type_check_instance_cast
g_type_check_instance_is_a
g_type_check_instance_is_fundamentally_a
g_type_check_class_cast
g_type_check_class_is_a
g_type_check_is_value_type

9
gobject/gtype.c
View File

@ -3974,6 +3974,15 @@ g_type_check_instance_is_a (GTypeInstance *type_instance,
return check;
}
gboolean
g_type_check_instance_is_fundamentally_a (GTypeInstance *type_instance,
GType fundamental_type)
{
if (!type_instance || !type_instance->g_class)
return FALSE;
return NODE_FUNDAMENTAL_TYPE(lookup_type_node_I (type_instance->g_class->g_type)) == fundamental_type;
}
gboolean
g_type_check_class_is_a (GTypeClass *type_class,
GType is_a_type)

16
gobject/gtype.h
View File

@ -489,6 +489,18 @@ struct _GTypeQuery
* Returns: %TRUE on success.
*/
#define G_TYPE_CHECK_INSTANCE_TYPE(instance, g_type) (_G_TYPE_CIT ((instance), (g_type)))
/**
* G_TYPE_CHECK_INSTANCE_FUNDAMENTAL_TYPE:
* @instance: Location of a #GTypeInstance structure.
* @g_type: The fundamental type to be checked
*
* Checks if @instance is an instance of the fundamental type identified by @g_type.
*
* This macro should only be used in type implementations.
*
* Returns: %TRUE on success.
*/
#define G_TYPE_CHECK_INSTANCE_FUNDAMENTAL_TYPE(instance, g_type) (_G_TYPE_CIFT ((instance), (g_type)))
/**
* G_TYPE_INSTANCE_GET_CLASS:
* @instance: Location of the #GTypeInstance structure.
@ -1895,6 +1907,9 @@ GTypeInstance* g_type_check_instance_cast (GTypeInstance *instance,
GLIB_AVAILABLE_IN_ALL
gboolean g_type_check_instance_is_a (GTypeInstance *instance,
GType iface_type) G_GNUC_PURE;
GLIB_AVAILABLE_IN_2_42
gboolean g_type_check_instance_is_fundamentally_a (GTypeInstance *instance,
GType fundamental_type) G_GNUC_PURE;
GLIB_AVAILABLE_IN_ALL
GTypeClass* g_type_check_class_cast (GTypeClass *g_class,
GType is_a_type);
@ -1934,6 +1949,7 @@ const gchar * g_type_name_from_class (GTypeClass *g_class);
#define _G_TYPE_CHV(vl) (g_type_check_value ((GValue*) vl))
#define _G_TYPE_IGC(ip, gt, ct) ((ct*) (((GTypeInstance*) ip)->g_class))
#define _G_TYPE_IGI(ip, gt, ct) ((ct*) g_type_interface_peek (((GTypeInstance*) ip)->g_class, gt))
#define _G_TYPE_CIFT(ip, ft) (g_type_check_instance_is_fundamentally_a ((GTypeInstance*) ip, ft))
#ifdef __GNUC__
# define _G_TYPE_CIT(ip, gt) (G_GNUC_EXTENSION ({ \
GTypeInstance *__inst = (GTypeInstance*) ip; GType __t = gt; gboolean __r; \