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