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mutter-performance-source/clutter/clutter-id-pool.c
Matthew Allum 74c8271db6 2008-03-09 Matthew Allum <mallum@openedhand.com>
* clutter/clutter-id-pool.c: (clutter_id_pool_free):
        Use g_slice_free not g_free.
        * clutter/clutter-main.c: (_clutter_do_pick):
        Dont 'over read' the framebuffer when picking (#839, Neil Roberts)
2008-03-09 19:07:17 +00:00

123 lines
3.1 KiB
C

/*
* Clutter.
*
* An OpenGL based 'interactive canvas' library.
*
* Authored By Matthew Allum <mallum@openedhand.com>
*
* Copyright (C) 2006-2008 OpenedHand
*
* 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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
* ClutterIDPool: pool of reusable integer ids associated with pointers.
*
* Author: Øyvind Kolås <pippin@o-hand-com>
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "clutter-debug.h"
#include "clutter-id-pool.h"
struct _ClutterIDPool
{
GArray *array; /* Array of pointers */
GSList *free_ids; /* A stack of freed ids */
};
ClutterIDPool *
clutter_id_pool_new (guint initial_size)
{
ClutterIDPool *self;
self = g_slice_new (ClutterIDPool);
self->array = g_array_sized_new (FALSE, FALSE,
sizeof (gpointer), initial_size);
self->free_ids = NULL;
return self;
}
void
clutter_id_pool_free (ClutterIDPool *id_pool)
{
g_return_if_fail (id_pool != NULL);
g_array_free (id_pool->array, TRUE);
g_slist_free (id_pool->free_ids);
g_slice_free (ClutterIDPool, id_pool);
}
guint32
clutter_id_pool_add (ClutterIDPool *id_pool,
gpointer ptr)
{
gpointer *array;
guint32 id;
g_return_val_if_fail (id_pool != NULL, 0);
if (id_pool->free_ids) /* There are items on our freelist, reuse one */
{
array = (void*) id_pool->array->data;
id = GPOINTER_TO_UINT (id_pool->free_ids->data);
id_pool->free_ids = g_slist_remove (id_pool->free_ids,
id_pool->free_ids->data);
array[id] = ptr;
return id;
}
/* Allocate new id */
id = id_pool->array->len;
g_array_append_val (id_pool->array, ptr);
return id;
}
void
clutter_id_pool_remove (ClutterIDPool *id_pool,
guint32 id)
{
gpointer *array;
g_return_if_fail (id_pool != NULL);
array = (void*) id_pool->array->data;
array[id] = (void*)0xdecafbad; /* set pointer to a recognizably voided
value */
id_pool->free_ids = g_slist_prepend (id_pool->free_ids,
GUINT_TO_POINTER (id));
}
gpointer
clutter_id_pool_lookup (ClutterIDPool *id_pool,
guint32 id)
{
gpointer *array;
g_return_val_if_fail (id_pool != NULL, NULL);
g_return_val_if_fail (id_pool->array != NULL, NULL);
g_return_val_if_fail (id < id_pool->array->len, NULL);
array = (void*) id_pool->array->data;
return array[id];
}