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ed272213f0
The cogl_is_* functions were showing up quite high on profiles due to
iterating through arrays of cogl handles.
This does away with all the handle arrays and implements a simple struct
inheritance scheme. All cogl objects now add a CoglHandleObject _parent;
member to their main structures. The base object includes 2 members a.t.m; a
ref_count, and a klass pointer. The klass in turn gives you a type and
virtual function for freeing objects of that type.
Each handle type has a _cogl_##handle_type##_get_type () function
automatically defined which returns a GQuark of the handle type, so now
implementing the cogl_is_* funcs is just a case of comparing with
obj->klass->type.
Another outcome of the re-work is that cogl_handle_{ref,unref} are also much
more efficient, and no longer need extending for each handle type added to
cogl. The cogl_##handle_type##_{ref,unref} functions are now deprecated and
are no longer used internally to Clutter or Cogl. Potentially we can remove
them completely before 1.0.
162 lines
6.0 KiB
C
162 lines
6.0 KiB
C
/*
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* Clutter COGL
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*
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* A basic GL/GLES Abstraction/Utility Layer
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*
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* Authored By Matthew Allum <mallum@openedhand.com>
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*
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* Copyright (C) 2008 OpenedHand
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __COGL_HANDLE_H
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#define __COGL_HANDLE_H
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typedef struct _CoglHandleClass
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{
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GQuark type;
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void *virt_free;
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} CoglHandleClass;
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/* All Cogl objects inherit from this base object by adding a member:
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*
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* CoglHandleObject _parent;
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*
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* at the top of its main structure. This structure is initialized
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* when you call _cogl_#type_name#_handle_new (new_object);
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*/
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typedef struct _CoglHandleObject
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{
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guint ref_count;
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CoglHandleClass *klass;
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} CoglHandleObject;
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/* Helper macro to encapsulate the common code for COGL reference
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counted handles */
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#if COGL_DEBUG
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#define _COGL_HANDLE_DEBUG_NEW(type_name, obj) \
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printf ("COGL " G_STRINGIFY (type_name) " NEW %p %i\n", \
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(obj), (obj)->ref_count)
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#define _COGL_HANDLE_DEBUG_REF(type_name, handle) \
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do { \
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CoglHandleObject *obj = (CoglHandleObject *)handle; \
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printf ("COGL %s REF %p %i\n", \
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g_quark_to_string ((obj)->klass->type), \
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(obj), (obj)->ref_count) \
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} while (0)
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#define _COGL_HANDLE_DEBUG_UNREF(type_name, handle) \
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do { \
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CoglHandleObject *obj = (CoglHandleObject *)handle; \
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printf ("COGL %s UNREF %p %i\n", \
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g_quark_to_string ((obj)->klass->type), \
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(obj), (obj)->ref_count - 1)
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} while (0)
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#define COGL_HANDLE_DEBUG_FREE(obj) \
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printf ("COGL %s FREE %p\n", \
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g_quark_to_string ((obj)->klass->type), (obj)) \
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#else /* COGL_DEBUG */
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#define _COGL_HANDLE_DEBUG_NEW(type_name, obj)
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#define _COGL_HANDLE_DEBUG_REF(type_name, obj)
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#define _COGL_HANDLE_DEBUG_UNREF(type_name, obj)
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#define COGL_HANDLE_DEBUG_FREE(obj)
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#endif /* COGL_DEBUG */
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#define COGL_HANDLE_DEFINE(TypeName, type_name) \
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\
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static CoglHandleClass _cogl_##type_name##_class; \
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\
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static GQuark \
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_cogl_##type_name##_get_type (void) \
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{ \
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static GQuark type = 0; \
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if (!type) \
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type = g_quark_from_static_string ("Cogl"#TypeName); \
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return type; \
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} \
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\
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static CoglHandle \
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_cogl_##type_name##_handle_new (Cogl##TypeName *new_obj) \
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{ \
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CoglHandleObject *obj = &new_obj->_parent; \
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obj->ref_count = 1; \
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\
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obj->klass = &_cogl_##type_name##_class; \
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if (!obj->klass->type) \
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{ \
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obj->klass->type = \
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_cogl_##type_name##_get_type (); \
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obj->klass->virt_free = _cogl_##type_name##_free; \
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} \
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\
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_COGL_HANDLE_DEBUG_NEW (TypeName, obj); \
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return (CoglHandle) new_obj; \
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} \
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\
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Cogl##TypeName * \
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_cogl_##type_name##_pointer_from_handle (CoglHandle handle) \
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{ \
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return (Cogl##TypeName *) handle; \
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} \
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\
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gboolean \
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cogl_is_##type_name (CoglHandle handle) \
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{ \
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CoglHandleObject *obj = (CoglHandleObject *)handle; \
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\
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return (obj->klass->type == \
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_cogl_##type_name##_get_type ()); \
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} \
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\
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CoglHandle G_GNUC_DEPRECATED \
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cogl_##type_name##_ref (CoglHandle handle) \
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{ \
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if (!cogl_is_##type_name (handle)) \
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return COGL_INVALID_HANDLE; \
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\
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_COGL_HANDLE_DEBUG_REF (TypeName, handle); \
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\
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cogl_handle_ref (handle); \
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\
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return handle; \
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} \
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\
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void G_GNUC_DEPRECATED \
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cogl_##type_name##_unref (CoglHandle handle) \
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{ \
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if (!cogl_is_##type_name (handle)) \
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{ \
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g_warning (G_STRINGIFY (cogl_##type_name##_unref) \
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": Ignoring unref of Cogl handle " \
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"due to type missmatch"); \
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return; \
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} \
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\
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_COGL_HANDLE_DEBUG_UNREF (TypeName, handle); \
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\
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cogl_handle_unref (handle); \
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}
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#endif /* __COGL_HANDLE_H */
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