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/* EINA - EFL data type library
* Copyright (C) 2007-2008 Jorge Luis Zapata Muga
*
* 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 2.1 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/>.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <stdlib.h>
#include "eina_config.h"
#include "eina_private.h"
/* undefs EINA_ARG_NONULL() so NULL checks are not compiled out! */
#include "eina_safety_checks.h"
#include "eina_lalloc.h"
/*============================================================================*
* Local *
*============================================================================*/
/**
* @cond LOCAL
*/
struct _Eina_Lalloc
{
void *data;
int num_allocated;
int num_elements;
int acc;
Eina_Lalloc_Alloc alloc_cb;
Eina_Lalloc_Free free_cb;
};
/**
* @endcond
*/
/*============================================================================*
* Global *
*============================================================================*/
/*============================================================================*
* API *
*============================================================================*/
/**
* @addtogroup Eina_Lalloc_Group Lazy allocator
*
* @{
*/
EINA_API Eina_Lalloc *eina_lalloc_new(void *data,
Eina_Lalloc_Alloc alloc_cb,
Eina_Lalloc_Free free_cb,
int num_init)
{
Eina_Lalloc *a;
EINA_SAFETY_ON_NULL_RETURN_VAL(alloc_cb, NULL);
EINA_SAFETY_ON_NULL_RETURN_VAL(free_cb, NULL);
a = calloc(1, sizeof(Eina_Lalloc));
a->data = data;
a->alloc_cb = alloc_cb;
a->free_cb = free_cb;
if (num_init > 0)
{
a->num_allocated = num_init;
a->alloc_cb(a->data, a->num_allocated);
}
return a;
}
EINA_API void eina_lalloc_free(Eina_Lalloc *a)
{
EINA_SAFETY_ON_NULL_RETURN(a);
EINA_SAFETY_ON_NULL_RETURN(a->free_cb);
a->free_cb(a->data);
free(a);
}
EINA_API Eina_Bool eina_lalloc_element_add(Eina_Lalloc *a)
{
EINA_SAFETY_ON_NULL_RETURN_VAL(a, EINA_FALSE);
EINA_SAFETY_ON_NULL_RETURN_VAL(a->alloc_cb, EINA_FALSE);
if (a->num_elements == a->num_allocated)
{
if (a->alloc_cb(a->data, (1 << a->acc)) == EINA_TRUE)
{
a->num_allocated = (1 << a->acc);
a->acc++;
}
else
return EINA_FALSE;
}
a->num_elements++;
return EINA_TRUE;
}
EINA_API Eina_Bool eina_lalloc_elements_add(Eina_Lalloc *a, int num)
{
int tmp;
EINA_SAFETY_ON_NULL_RETURN_VAL(a, EINA_FALSE);
EINA_SAFETY_ON_NULL_RETURN_VAL(a->alloc_cb, EINA_FALSE);
tmp = a->num_elements + num;
if (tmp > a->num_allocated)
{
int allocated;
int acc;
allocated = a->num_allocated;
acc = a->acc;
while (tmp > allocated)
{
allocated = (1 << acc);
acc++;
}
if (a->alloc_cb(a->data, allocated) == EINA_TRUE)
{
a->num_allocated = allocated;
a->acc = acc;
}
else
return EINA_FALSE;
}
a->num_elements += num;
return EINA_TRUE;
}
/**
* @}
*/
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