/* * 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 __cplusplusextern "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 > 64000ltypedef u32_t mem_size_t;#elsetypedef 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__ */