FreeRTOS/Common/ethernet/lwIP_130/src/include/lwip/mem.h

   1 /*
   2  * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without modification,
   6  * are permitted provided that the following conditions are met:
   7  *
   8  * 1. Redistributions of source code must retain the above copyright notice,
   9  *    this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright notice,
  11  *    this list of conditions and the following disclaimer in the documentation
  12  *    and/or other materials provided with the distribution.
  13  * 3. The name of the author may not be used to endorse or promote products
  14  *    derived from this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
  17  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  18  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
  19  * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  20  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
  21  * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  22  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  23  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  24  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
  25  * OF SUCH DAMAGE.
  26  *
  27  * This file is part of the lwIP TCP/IP stack.
  28  *
  29  * Author: Adam Dunkels <adam@sics.se>
  30  *
  31  */
  32 #ifndef __LWIP_MEM_H__
  33 #define __LWIP_MEM_H__
  34
  35 #include "lwip/opt.h"
  36
  37 #ifdef __cplusplus
  38 extern "C" {
  39 #endif
  40
  41 #if MEM_LIBC_MALLOC
  42
  43 #include <stddef.h> /* for size_t */
  44
  45 typedef size_t mem_size_t;
  46
  47 /* aliases for C library malloc() */
  48 #define mem_init()
  49 /* in case C library malloc() needs extra protection,
  50  * allow these defines to be overridden.
  51  */
  52 #ifndef mem_free
  53 #define mem_free(x) free(x)
  54 #endif
  55 #ifndef mem_malloc
  56 #define mem_malloc(x) malloc(x)
  57 #endif
  58 #ifndef mem_calloc
  59 #define mem_calloc(x, y) calloc(x, y)
  60 #endif
  61 #ifndef mem_realloc
  62 #define mem_realloc(x, size) (x)
  63 #endif
  64 #else /* MEM_LIBC_MALLOC */
  65
  66 /* MEM_SIZE would have to be aligned, but using 64000 here instead of
  67  * 65535 leaves some room for alignment...
  68  */
  69 #if MEM_SIZE > 64000l
  70 typedef u32_t mem_size_t;
  71 #else
  72 typedef u16_t mem_size_t;
  73 #endif /* MEM_SIZE > 64000 */
  74
  75 #if MEM_USE_POOLS
  76 /** mem_init is not used when using pools instead of a heap */
  77 #define mem_init()
  78 /** mem_realloc is not used when using pools instead of a heap:
  79     we can't free part of a pool element and don't want to copy the rest */
  80 #define mem_realloc(mem, size) (mem)
  81 #else /* MEM_USE_POOLS */
  82 /* lwIP alternative malloc */
  83 void  mem_init(void);
  84 void *mem_realloc(void *mem, mem_size_t size);
  85 #endif /* MEM_USE_POOLS */
  86 void *mem_malloc(mem_size_t size);
  87 void *mem_calloc(mem_size_t count, mem_size_t size);
  88 void  mem_free(void *mem);
  89 #endif /* MEM_LIBC_MALLOC */
  90
  91 #ifndef LWIP_MEM_ALIGN_SIZE
  92 #define LWIP_MEM_ALIGN_SIZE(size) (((size) + MEM_ALIGNMENT - 1) & ~(MEM_ALIGNMENT-1))
  93 #endif
  94
  95 #ifndef LWIP_MEM_ALIGN
  96 #define LWIP_MEM_ALIGN(addr) ((void *)(((mem_ptr_t)(addr) + MEM_ALIGNMENT - 1) & ~(mem_ptr_t)(MEM_ALIGNMENT-1)))
  97 #endif
  98
  99 #ifdef __cplusplus
 100 }
 101 #endif
 102
 103 #endif /* __LWIP_MEM_H__ */