text: /*
   * 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 free
  #endif
  #ifndef mem_malloc
  #define mem_malloc malloc
  #endif
  #ifndef mem_calloc
  #define mem_calloc calloc
  #endif
  #ifndef mem_realloc
  static void* mem_realloc(void* mem, mem_size_t size)
  {
  	LWIP_UNUSED_ARG(size);
  	return mem;
  }
  #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__ */
  