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/*

 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without modification,

 * are permitted provided that the following conditions are met:

 *

 * 1. Redistributions of source code must retain the above copyright notice,

 *    this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright notice,

 *    this list of conditions and the following disclaimer in the documentation

 *    and/or other materials provided with the distribution.

 * 3. The name of the author may not be used to endorse or promote products

 *    derived from this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED

 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF

 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT

 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT

 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING

 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY

 * OF SUCH DAMAGE.

 *

 * This file is part of the lwIP TCP/IP stack.

 *

 * Author: Adam Dunkels <adam@sics.se>

 *

 */

#ifndef __LWIP_MEM_H__

#define __LWIP_MEM_H__

#include "lwip/opt.h"

#ifdef __cplusplus

extern "C" {

#endif

#if MEM_LIBC_MALLOC

#include <stddef.h> /* for size_t */

typedef size_t mem_size_t;

/* aliases for C library malloc() */

#define mem_init()

/* in case C library malloc() needs extra protection,

 * allow these defines to be overridden.

 */

#ifndef mem_free

#define mem_free(x) free(x)

#endif

#ifndef mem_malloc

#define mem_malloc(x) malloc(x)

#endif

#ifndef mem_calloc

#define mem_calloc(x, y) calloc(x, y)

#endif

#ifndef mem_realloc

#define mem_realloc(x, size) (x)

#endif

#else /* MEM_LIBC_MALLOC */

/* MEM_SIZE would have to be aligned, but using 64000 here instead of

 * 65535 leaves some room for alignment...

 */

#if MEM_SIZE > 64000l

typedef u32_t mem_size_t;

#else

typedef u16_t mem_size_t;

#endif /* MEM_SIZE > 64000 */

#if MEM_USE_POOLS

/** mem_init is not used when using pools instead of a heap */

#define mem_init()

/** mem_realloc is not used when using pools instead of a heap:

    we can't free part of a pool element and don't want to copy the rest */

#define mem_realloc(mem, size) (mem)

#else /* MEM_USE_POOLS */

/* lwIP alternative malloc */

void  mem_init(void);

void *mem_realloc(void *mem, mem_size_t size);

#endif /* MEM_USE_POOLS */

void *mem_malloc(mem_size_t size);

void *mem_calloc(mem_size_t count, mem_size_t size);

void  mem_free(void *mem);

#endif /* MEM_LIBC_MALLOC */

#ifndef LWIP_MEM_ALIGN_SIZE

#define LWIP_MEM_ALIGN_SIZE(size) (((size) + MEM_ALIGNMENT - 1) & ~(MEM_ALIGNMENT-1))

#endif

#ifndef LWIP_MEM_ALIGN

#define LWIP_MEM_ALIGN(addr) ((void *)(((mem_ptr_t)(addr) + MEM_ALIGNMENT - 1) & ~(mem_ptr_t)(MEM_ALIGNMENT-1)))

#endif

#ifdef __cplusplus

}

#endif

#endif /* __LWIP_MEM_H__ */