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CoglObject: Adds cogl_object_{get,set}_user_data

Browse Source 
This provides a mechanism for associating private data with any
CoglObject. We expect Clutter will use this to associate weak materials
with normal materials.
This commit is contained in:
Robert Bragg 2010-05-27 22:24:56 +01:00
parent ef08c6369a
commit 5af3ead3a2
8 changed files with 552 additions and 213 deletions
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3
cogl/Makefile.am
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@ -80,6 +80,9 @@ cogl_sources_c = \
$(srcdir)/cogl-context.c \
$(srcdir)/cogl-internal.h \
$(srcdir)/cogl.c \
$(srcdir)/cogl-object-private.h \
$(srcdir)/cogl-object.h \
$(srcdir)/cogl-object.c \
$(srcdir)/cogl-util.h \
$(srcdir)/cogl-util.c \
$(srcdir)/cogl-bitmap-private.h \

2
cogl/cogl-handle.h
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@ -29,7 +29,7 @@
#ifndef __COGL_HANDLE_H
#define __COGL_HANDLE_H
#include "cogl-object.h"
#include "cogl-object-private.h"
#endif /* __COGL_HANDLE_H */

205
cogl/cogl-object-private.h Normal file
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@ -0,0 +1,205 @@
/*
* Cogl
*
* An object oriented GL/GLES Abstraction/Utility Layer
*
* Copyright (C) 2008,2009,2010 Intel Corporation.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
* Authors:
* Robert Bragg <robert@linux.intel.com>
*/
#ifndef __COGL_OBJECT_PRIVATE_H
#define __COGL_OBJECT_PRIVATE_H
#include "cogl-object.h"
/* For compatability until all components have been converted */
typedef struct _CoglObjectClass CoglHandleClass;
typedef struct _CoglObject CoglHandleObject;
typedef struct _CoglObjectClass
{
GQuark type;
void *virt_free;
} CoglObjectClass;
#define COGL_OBJECT_N_PRE_ALLOCATED_USER_DATA_ENTRIES 2
typedef struct
{
CoglUserDataKey *key;
void *user_data;
CoglUserDataDestroyCallback destroy;
} CoglUserDataEntry;
/* All Cogl objects inherit from this base object by adding a member:
*
* CoglObject _parent;
*
* at the top of its main structure. This structure is initialized
* when you call _cogl_#type_name#_object_new (new_object);
*/
struct _CoglObject
{
unsigned int ref_count;
CoglUserDataEntry user_data_entry[
COGL_OBJECT_N_PRE_ALLOCATED_USER_DATA_ENTRIES];
GArray *user_data_array;
int n_user_data_entries;
CoglObjectClass *klass;
};
/* Helper macro to encapsulate the common code for COGL reference
counted objects */
#ifdef COGL_OBJECT_DEBUG
#define _COGL_OBJECT_DEBUG_NEW(type_name, obj) \
COGL_NOTE (HANDLE, "COGL " G_STRINGIFY (type_name) " NEW %p %i", \
(obj), (obj)->ref_count)
#define _COGL_OBJECT_DEBUG_REF(type_name, object) G_STMT_START { \
CoglObject *__obj = (CoglObject *)object; \
COGL_NOTE (HANDLE, "COGL %s REF %p %i", \
g_quark_to_string ((__obj)->klass->type), \
(__obj), (__obj)->ref_count); } G_STMT_END
#define _COGL_OBJECT_DEBUG_UNREF(type_name, object) G_STMT_START { \
CoglObject *__obj = (CoglObject *)object; \
COGL_NOTE (HANDLE, "COGL %s UNREF %p %i", \
g_quark_to_string ((__obj)->klass->type), \
(__obj), (__obj)->ref_count - 1); } G_STMT_END
#define COGL_OBJECT_DEBUG_FREE(obj) \
COGL_NOTE (HANDLE, "COGL %s FREE %p", \
g_quark_to_string ((obj)->klass->type), (obj))
#else /* !COGL_OBJECT_DEBUG */
#define _COGL_OBJECT_DEBUG_NEW(type_name, obj)
#define _COGL_OBJECT_DEBUG_REF(type_name, obj)
#define _COGL_OBJECT_DEBUG_UNREF(type_name, obj)
#define COGL_OBJECT_DEBUG_FREE(obj)
#endif /* COGL_OBJECT_DEBUG */
/* For temporary compatability */
#define _COGL_HANDLE_DEBUG_NEW _COGL_OBJECT_DEBUG_NEW
#define _COGL_HANDLE_DEBUG_REF _COGL_OBJECT_DEBUG_REF
#define _COGL_HANDLE_DEBUG_UNREF _COGL_OBJECT_DEBUG_UNREF
#define COGL_HANDLE_DEBUG_FREE COGL_OBJECT_DEBUG_FREE
#define COGL_OBJECT_DEFINE(TypeName, type_name) \
\
static CoglObjectClass _cogl_##type_name##_class; \
\
GQuark \
_cogl_object_##type_name##_get_type (void) \
{ \
static GQuark type = 0; \
if (!type) \
type = g_quark_from_static_string ("Cogl"#TypeName); \
return type; \
} \
\
GQuark \
_cogl_handle_##type_name##_get_type (void) \
{ \
return _cogl_object_##type_name##_get_type (); \
} \
\
static Cogl##TypeName * \
_cogl_##type_name##_object_new (Cogl##TypeName *new_obj) \
{ \
CoglObject *obj = (CoglObject *)&new_obj->_parent; \
obj->ref_count = 1; \
obj->n_user_data_entries = 0; \
obj->user_data_array = NULL; \
\
obj->klass = &_cogl_##type_name##_class; \
if (!obj->klass->type) \
{ \
obj->klass->type = _cogl_object_##type_name##_get_type ();\
obj->klass->virt_free = _cogl_##type_name##_free; \
} \
\
_COGL_OBJECT_DEBUG_NEW (TypeName, obj); \
return new_obj; \
} \
\
Cogl##TypeName * \
_cogl_##type_name##_pointer_from_handle (CoglHandle handle) \
{ \
return handle; \
} \
\
gboolean \
cogl_is_##type_name (CoglHandle object) \
{ \
CoglObject *obj = object; \
\
if (object == NULL) \
return FALSE; \
\
return (obj->klass->type == \
_cogl_object_##type_name##_get_type ()); \
} \
\
void * G_GNUC_DEPRECATED \
cogl_##type_name##_ref (void *object) \
{ \
if (!cogl_is_##type_name (object)) \
return NULL; \
\
_COGL_OBJECT_DEBUG_REF (TypeName, object); \
\
cogl_handle_ref (object); \
\
return object; \
} \
\
void G_GNUC_DEPRECATED \
cogl_##type_name##_unref (void *object) \
{ \
if (!cogl_is_##type_name (object)) \
{ \
g_warning (G_STRINGIFY (cogl_##type_name##_unref) \
": Ignoring unref of Cogl handle " \
"due to type mismatch"); \
return; \
} \
\
_COGL_OBJECT_DEBUG_UNREF (TypeName, object); \
\
cogl_handle_unref (object); \
}
/* For temporary compatability */
#define COGL_HANDLE_DEFINE(TypeName, type_name) \
\
COGL_OBJECT_DEFINE (TypeName, type_name) \
\
static Cogl##TypeName * \
_cogl_##type_name##_handle_new (CoglHandle handle) \
{ \
return _cogl_##type_name##_object_new (handle); \
}
#endif /* __COGL_OBJECT_PRIVATE_H */

246
cogl/cogl-object.c Normal file
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@ -0,0 +1,246 @@
/*
* Cogl
*
* An object oriented GL/GLES Abstraction/Utility Layer
*
* Copyright (C) 2007,2008,2009,2010 Intel Corporation.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*
* Authors:
* Robert Bragg <robert@linux.intel.com>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <glib.h>
#include <string.h>
#include "cogl-types.h"
#include "cogl-object-private.h"
void *
cogl_object_ref (void *object)
{
CoglObject *obj = object;
g_return_val_if_fail (object != NULL, NULL);
obj->ref_count++;
return object;
}
CoglHandle
cogl_handle_ref (CoglHandle handle)
{
return cogl_object_ref (handle);
}
void
cogl_object_unref (void *object)
{
CoglObject *obj = object;
g_return_if_fail (object != NULL);
g_return_if_fail (obj->ref_count > 0);
if (--obj->ref_count < 1)
{
void (*free_func)(void *obj);
if (obj->n_user_data_entries)
{
int i;
int count = MIN (obj->n_user_data_entries,
COGL_OBJECT_N_PRE_ALLOCATED_USER_DATA_ENTRIES);
for (i = 0; i < count; i++)
{
CoglUserDataEntry *entry = &obj->user_data_entry[i];
if (entry->destroy)
entry->destroy (entry->user_data);
}
if (obj->user_data_array != NULL)
{
for (i = 0; i < obj->user_data_array->len; i++)
{
CoglUserDataEntry *entry =
&g_array_index (obj->user_data_array,
CoglUserDataEntry, i);
if (entry->destroy)
entry->destroy (entry->user_data);
}
}
g_array_free (obj->user_data_array, TRUE);
}
COGL_OBJECT_DEBUG_FREE (obj);
free_func = obj->klass->virt_free;
free_func (obj);
}
}
void
cogl_handle_unref (CoglHandle handle)
{
cogl_object_unref (handle);
}
GType
cogl_object_get_type (void)
{
static GType our_type = 0;
/* XXX: We are keeping the "CoglHandle" name for now incase it would
* break bindings to change to "CoglObject" */
if (G_UNLIKELY (our_type == 0))
our_type = g_boxed_type_register_static (g_intern_static_string ("CoglHandle"),
(GBoxedCopyFunc) cogl_object_ref,
(GBoxedFreeFunc) cogl_object_unref);
return our_type;
}
GType
cogl_handle_get_type (void)
{
return cogl_object_get_type ();
}
/* XXX: Unlike for cogl_object_get_user_data this code will return
* an empty entry if available and no entry for the given key can be
* found. */
static CoglUserDataEntry *
_cogl_object_find_entry (CoglObject *object, CoglUserDataKey *key)
{
CoglUserDataEntry *entry = NULL;
int count;
int i;
count = MIN (object->n_user_data_entries,
COGL_OBJECT_N_PRE_ALLOCATED_USER_DATA_ENTRIES);
for (i = 0; i < count; i++)
{
CoglUserDataEntry *current = &object->user_data_entry[i];
if (current->key == key)
return current;
if (current->user_data == NULL)
entry = current;
}
if (G_UNLIKELY (object->user_data_array != NULL))
{
for (i = 0; i < object->user_data_array->len; i++)
{
CoglUserDataEntry *current =
&g_array_index (object->user_data_array, CoglUserDataEntry, i);
if (current->key == key)
return current;
if (current->user_data == NULL)
entry = current;
}
}
return entry;
}
void
cogl_object_set_user_data (CoglObject *object,
CoglUserDataKey *key,
void *user_data,
CoglUserDataDestroyCallback destroy)
{
CoglUserDataEntry new_entry;
CoglUserDataEntry *entry;
if (user_data)
{
new_entry.key = key;
new_entry.user_data = user_data;
new_entry.destroy = destroy;
}
else
memset (&new_entry, 0, sizeof (new_entry));
entry = _cogl_object_find_entry (object, key);
if (entry)
{
if (G_LIKELY (entry->destroy))
entry->destroy (entry->user_data);
}
else
{
if (G_LIKELY (object->n_user_data_entries <
COGL_OBJECT_N_PRE_ALLOCATED_USER_DATA_ENTRIES))
entry = &object->user_data_entry[object->n_user_data_entries++];
else
{
if (G_UNLIKELY (object->user_data_array == NULL))
{
object->user_data_array =
g_array_new (FALSE, FALSE, sizeof (CoglUserDataEntry));
}
g_array_set_size (object->user_data_array,
object->user_data_array->len + 1);
entry =
&g_array_index (object->user_data_array, CoglUserDataEntry,
object->user_data_array->len - 1);
object->n_user_data_entries++;
}
}
*entry = new_entry;
}
void *
cogl_object_get_user_data (CoglObject *object, CoglUserDataKey *key)
{
int count;
int i;
count = MIN (object->n_user_data_entries,
COGL_OBJECT_N_PRE_ALLOCATED_USER_DATA_ENTRIES);
for (i = 0; i < count; i++)
{
CoglUserDataEntry *entry = &object->user_data_entry[i];
if (entry->key == key)
return entry->user_data;
}
if (object->user_data_array != NULL)
{
for (i = 0; i < object->user_data_array->len; i++)
{
CoglUserDataEntry *entry =
&g_array_index (object->user_data_array, CoglUserDataEntry, i);
if (entry->key == key)
return entry->user_data;
}
}
return NULL;
}

241
cogl/cogl-object.h
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@ -3,7 +3,7 @@
*
* An object oriented GL/GLES Abstraction/Utility Layer
*
* Copyright (C) 2008,2009 Intel Corporation.
* Copyright (C) 2009,2010 Intel Corporation.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
@ -16,7 +16,8 @@
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*
*
*/
@ -24,162 +25,100 @@
#ifndef __COGL_OBJECT_H
#define __COGL_OBJECT_H
/* For compatability until all components have been converted */
typedef struct _CoglObjectClass CoglHandleClass;
typedef struct _CoglObject CoglHandleObject;
typedef struct _CoglObject CoglObject;
typedef struct _CoglObjectClass
{
GQuark type;
void *virt_free;
} CoglObjectClass;
/* All Cogl objects inherit from this base object by adding a member:
/**
* CoglUserDataKey:
* @unused: ignored.
*
* CoglObject _parent;
* A #CoglUserDataKey is used to declare a key for attaching data to a
* #CoglObject using cogl_object_set_user_data. The typedef only exists as a
* formality to make code self documenting since only the unique address of a
* #CoglUserDataKey is used.
*
* at the top of its main structure. This structure is initialized
* when you call _cogl_#type_name#_object_new (new_object);
* Typically you would declare a static #CoglUserDataKey and set private data
* on an object something like this:
*
* |[
* static CoglUserDataKey path_private_key;
*
* static void
* destroy_path_private_cb (void *data)
* {
* g_free (data);
* }
*
* static void
* my_path_set_data (CoglPath *path, void *data)
* {
* cogl_object_set_user_data (COGL_OBJECT (path),
* &private_key,
* data,
* destroy_path_private_cb);
* }
* ]|
*
* Since: 1.4
*/
typedef struct _CoglObject
typedef struct
{
unsigned int ref_count;
CoglObjectClass *klass;
} CoglObject;
int unused;
} CoglUserDataKey;
/* Helper macro to encapsulate the common code for COGL reference
counted objects */
/**
* CoglUserDataDestroyCallback:
* @user_data: The data whos association with a #CoglObject has been
* destoyed.
*
* When associating private data with a #CoglObject a callback can be
* given which will be called either if the object is destroyed or if
* cogl_object_set_user_data() is called with NULL user_data for the
* same key.
*
* Since: 1.4
*/
typedef void (*CoglUserDataDestroyCallback) (void *user_data);
#ifdef COGL_OBJECT_DEBUG
#define _COGL_OBJECT_DEBUG_NEW(type_name, obj) \
COGL_NOTE (HANDLE, "COGL " G_STRINGIFY (type_name) " NEW %p %i", \
(obj), (obj)->ref_count)
#define _COGL_OBJECT_DEBUG_REF(type_name, object) G_STMT_START { \
CoglObject *__obj = (CoglObject *)object; \
COGL_NOTE (HANDLE, "COGL %s REF %p %i", \
g_quark_to_string ((__obj)->klass->type), \
(__obj), (__obj)->ref_count); } G_STMT_END
#define _COGL_OBJECT_DEBUG_UNREF(type_name, object) G_STMT_START { \
CoglObject *__obj = (CoglObject *)object; \
COGL_NOTE (HANDLE, "COGL %s UNREF %p %i", \
g_quark_to_string ((__obj)->klass->type), \
(__obj), (__obj)->ref_count - 1); } G_STMT_END
#define COGL_OBJECT_DEBUG_FREE(obj) \
COGL_NOTE (HANDLE, "COGL %s FREE %p", \
g_quark_to_string ((obj)->klass->type), (obj))
#else /* !COGL_OBJECT_DEBUG */
#define _COGL_OBJECT_DEBUG_NEW(type_name, obj)
#define _COGL_OBJECT_DEBUG_REF(type_name, obj)
#define _COGL_OBJECT_DEBUG_UNREF(type_name, obj)
#define COGL_OBJECT_DEBUG_FREE(obj)
#endif /* COGL_OBJECT_DEBUG */
/* For temporary compatability */
#define _COGL_HANDLE_DEBUG_NEW _COGL_OBJECT_DEBUG_NEW
#define _COGL_HANDLE_DEBUG_REF _COGL_OBJECT_DEBUG_REF
#define _COGL_HANDLE_DEBUG_UNREF _COGL_OBJECT_DEBUG_UNREF
#define COGL_HANDLE_DEBUG_FREE COGL_OBJECT_DEBUG_FREE
#define COGL_OBJECT_DEFINE(TypeName, type_name) \
\
static CoglObjectClass _cogl_##type_name##_class; \
\
GQuark \
_cogl_object_##type_name##_get_type (void) \
{ \
static GQuark type = 0; \
if (!type) \
type = g_quark_from_static_string ("Cogl"#TypeName); \
return type; \
} \
\
GQuark \
_cogl_handle_##type_name##_get_type (void) \
{ \
return _cogl_object_##type_name##_get_type (); \
} \
\
static Cogl##TypeName * \
_cogl_##type_name##_object_new (Cogl##TypeName *new_obj) \
{ \
CoglObject *obj = (CoglObject *)&new_obj->_parent;\
obj->ref_count = 1; \
\
obj->klass = &_cogl_##type_name##_class; \
if (!obj->klass->type) \
{ \
obj->klass->type = _cogl_object_##type_name##_get_type ();\
obj->klass->virt_free = _cogl_##type_name##_free; \
} \
\
_COGL_OBJECT_DEBUG_NEW (TypeName, obj); \
return new_obj; \
} \
\
Cogl##TypeName * \
_cogl_##type_name##_pointer_from_handle (CoglHandle handle) \
{ \
return handle; \
} \
\
gboolean \
cogl_is_##type_name (CoglHandle object) \
{ \
CoglObject *obj = object; \
\
if (object == NULL) \
return FALSE; \
\
return (obj->klass->type == \
_cogl_object_##type_name##_get_type ()); \
} \
\
void * G_GNUC_DEPRECATED \
cogl_##type_name##_ref (void *object) \
{ \
if (!cogl_is_##type_name (object)) \
return NULL; \
\
_COGL_OBJECT_DEBUG_REF (TypeName, object); \
\
cogl_handle_ref (object); \
\
return object; \
} \
\
void G_GNUC_DEPRECATED \
cogl_##type_name##_unref (void *object) \
{ \
if (!cogl_is_##type_name (object)) \
{ \
g_warning (G_STRINGIFY (cogl_##type_name##_unref) \
": Ignoring unref of Cogl handle " \
"due to type mismatch"); \
return; \
} \
\
_COGL_OBJECT_DEBUG_UNREF (TypeName, object); \
\
cogl_handle_unref (object); \
}
/* For temporary compatability */
#define COGL_HANDLE_DEFINE(TypeName, type_name) \
\
COGL_OBJECT_DEFINE (TypeName, type_name) \
\
static Cogl##TypeName * \
_cogl_##type_name##_handle_new (CoglHandle handle) \
{ \
return _cogl_##type_name##_object_new (handle); \
}
/**
* cogl_object_set_user_data:
* @object: The object to associate private data with
* @key: The address of a #CoglUserDataKey which provides a unique value
* with which to index the private data.
* @user_data: The data to associate with the given object, or NULL to
* remove a previous association.
* @destroy: A #CoglUserDataDestroyCallback to call if the object is
* destroyed or if the association is removed by later setting
* NULL data for the same key.
*
* Associates some private @user_data with a given #CoglObject. To
* later remove the association call cogl_object_set_user_data() with
* the same @key but NULL for the @user_data.
*
* Since: 1.4
*/
void
cogl_object_set_user_data (CoglObject *object,
CoglUserDataKey *key,
void *user_data,
CoglUserDataDestroyCallback destroy);
/**
* cogl_object_get_user_data:
* @object: The object with associated private data to query
* @key: The address of a #CoglUserDataKey which provides a unique value
* with which to index the private data.
*
* Finds the user data previously associated with @object using
* the given @key. If no user data has been associated with @object
* for the given @key this function returns NULL.
*
* Returns: The user data previously associated with @object using
* the given @key; or NULL if no associated data is found.
*
* Since: 1.4
*/
void *
cogl_object_get_user_data (CoglObject *object,
CoglUserDataKey *key);
#endif /* __COGL_OBJECT_H */

61
cogl/cogl-util.c
View File

@ -61,67 +61,6 @@ cogl_util_next_p2 (int a)
/* gtypes */
void *
cogl_object_ref (void *object)
{
CoglObject *obj = object;
g_return_val_if_fail (object != NULL, NULL);
obj->ref_count++;
return object;
}
CoglHandle
cogl_handle_ref (CoglHandle handle)
{
return cogl_object_ref (handle);
}
void
cogl_object_unref (void *object)
{
CoglObject *obj = object;
g_return_if_fail (object != NULL);
g_return_if_fail (obj->ref_count > 0);
if (--obj->ref_count < 1)
{
void (*free_func)(void *obj);
COGL_OBJECT_DEBUG_FREE (obj);
free_func = obj->klass->virt_free;
free_func (obj);
}
}
void
cogl_handle_unref (CoglHandle handle)
{
cogl_object_unref (handle);
}
GType
cogl_object_get_type (void)
{
static GType our_type = 0;
/* XXX: We are keeping the "CoglHandle" name for now incase it would
* break bindings to change to "CoglObject" */
if (G_UNLIKELY (our_type == 0))
our_type = g_boxed_type_register_static (g_intern_static_string ("CoglHandle"),
(GBoxedCopyFunc) cogl_object_ref,
(GBoxedFreeFunc) cogl_object_unref);
return our_type;
}
GType
cogl_handle_get_type (void)
{
return cogl_object_get_type ();
}
/*
* CoglFixed
*/

1
cogl/cogl.h
View File

@ -31,6 +31,7 @@
#include <cogl/cogl-defines.h>
#include <cogl/cogl-object.h>
#include <cogl/cogl-bitmap.h>
#include <cogl/cogl-color.h>
#include <cogl/cogl-debug.h>

6
doc/reference/cogl/cogl-sections.txt
View File

@ -1,6 +1,12 @@
<SECTION>
<FILE>cogl</FILE>
<TITLE>General API</TITLE>
CoglObject
cogl_object_ref
cogl_object_unref
CoglUserDataKey
cogl_object_get_user_data
cogl_object_set_user_data
COGL_INVALID_HANDLE
CoglHandle
cogl_handle_ref