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/* EINA - EFL data type library
 * Copyright (C) 2008 Cedric BAIL
 *
 * 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 <string.h>
#include <ememoa_mempool_fixed.h>

#include "eina_inlist.h"
#include "eina_error.h"
#include "eina_module.h"
#include "eina_mempool.h"

#include "eina_private.h"

typedef struct _Eina_Ememoa_Fixed_Mempool Eina_Ememoa_Fixed_Mempool;
struct _Eina_Ememoa_Fixed_Mempool
{
   struct ememoa_mempool_desc_s *desc;
   int pool;
};

static void *
eina_ememoa_fixed_malloc(void *data, EINA_UNUSED unsigned int size)
{
   Eina_Ememoa_Fixed_Mempool *efm = data;

   return ememoa_mempool_fixed_pop_object(efm->pool);
}

static void
eina_ememoa_fixed_free(void *data, void *ptr)
{
   Eina_Ememoa_Fixed_Mempool *efm = data;

   ememoa_mempool_fixed_push_object(efm->pool, ptr);
}

static void *
eina_ememoa_fixed_realloc(EINA_UNUSED void *data,
                          EINA_UNUSED void *element,
                          EINA_UNUSED unsigned int size)
{
   return NULL;
}

static void
eina_ememoa_fixed_gc(void *data)
{
   Eina_Ememoa_Fixed_Mempool *efm = data;

   ememoa_mempool_fixed_garbage_collect(efm->pool);
}

static void
eina_ememoa_fixed_statistics(void *data)
{
   Eina_Ememoa_Fixed_Mempool *efm = data;

   ememoa_mempool_fixed_display_statistic(efm->pool);
   (void)efm;
}

static void *
eina_ememoa_fixed_init(const char *context,
                       EINA_UNUSED const char *option,
                       va_list args)
{
   struct ememoa_mempool_desc_s *desc = NULL;
   Eina_Ememoa_Fixed_Mempool *efm = NULL;
   Eina_Bool thread_protect;
   int context_length;
   int item_size;
   int pool_size;

   if (context)
     {
        context_length = strlen(context) + 1;

        desc = calloc(1, sizeof (struct ememoa_mempool_desc_s) + context_length);
        if (!desc)
           goto on_error;

        desc->name = (char *)(desc + 1);
        memcpy((char *)desc->name, context, context_length);
     }

   item_size = va_arg(args, int);
   pool_size = va_arg(args, int);
   thread_protect = va_arg(args, int);

   efm = malloc(sizeof (Eina_Ememoa_Fixed_Mempool));
   if (!efm)
      goto on_error;

   efm->desc = desc;
   efm->pool = ememoa_mempool_fixed_init(
         item_size,
         pool_size,
         thread_protect ?
         EMEMOA_THREAD_PROTECTION : 0,
         efm->desc);
   if (efm->pool < 0)
      goto on_error;

   return efm;

on_error:
   if (desc)
      free(desc);

   if (efm)
      free(efm);

   return NULL;
}

static void
eina_ememoa_fixed_shutdown(void *data)
{
   Eina_Ememoa_Fixed_Mempool *efm = data;

   if (efm->desc)
      free(efm->desc);

      ememoa_mempool_fixed_clean(efm->pool);
   free(efm);
}

static Eina_Mempool_Backend _eina_ememoa_mp_backend = {
   .name = "ememoa_fixed",
   .init = &eina_ememoa_fixed_init,
   .shutdown = &eina_ememoa_fixed_shutdown,
   .realloc = &eina_ememoa_fixed_realloc,
   .alloc = &eina_ememoa_fixed_malloc,
   .free = &eina_ememoa_fixed_free,
   .garbage_collect = &eina_ememoa_fixed_gc,
   .statistics = &eina_ememoa_fixed_statistics,
   .repack = NULL
};

Eina_Bool ememoa_fixed_init(void)
{
   return eina_mempool_register(&_eina_ememoa_mp_backend);
}

void ememoa_fixed_shutdown(void)
{
   eina_mempool_unregister(&_eina_ememoa_mp_backend);
}


#ifndef EINA_STATIC_BUILD_EMEMOA_FIXED

EINA_MODULE_INIT(ememoa_fixed_init);
EINA_MODULE_SHUTDOWN(ememoa_fixed_shutdown);

#endif /* ! EINA_STATIC_BUILD_EMEMOA_FIXED */