1 | /**
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2 | * @file
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3 | * lwIP internal memory implementations (do not use in application code)
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4 | */
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5 |
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6 | /*
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7 | * Copyright (c) 2018 Swedish Institute of Computer Science.
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8 | * All rights reserved.
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9 | *
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10 | * Redistribution and use in source and binary forms, with or without modification,
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11 | * are permitted provided that the following conditions are met:
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12 | *
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13 | * 1. Redistributions of source code must retain the above copyright notice,
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14 | * this list of conditions and the following disclaimer.
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15 | * 2. Redistributions in binary form must reproduce the above copyright notice,
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16 | * this list of conditions and the following disclaimer in the documentation
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17 | * and/or other materials provided with the distribution.
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18 | * 3. The name of the author may not be used to endorse or promote products
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19 | * derived from this software without specific prior written permission.
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20 | *
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21 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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22 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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23 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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24 | * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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25 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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26 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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27 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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28 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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29 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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30 | * OF SUCH DAMAGE.
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31 | *
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32 | * This file is part of the lwIP TCP/IP stack.
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33 | *
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34 | * Author: Simon Goldschmidt <goldsimon@gmx.de>
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35 | *
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36 | */
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37 |
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38 | #ifndef LWIP_HDR_MEM_PRIV_H
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39 | #define LWIP_HDR_MEM_PRIV_H
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40 |
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41 | #include "lwip/opt.h"
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42 |
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43 | #ifdef __cplusplus
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44 | extern "C" {
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45 | #endif
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46 |
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47 | #include "lwip/mem.h"
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48 |
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49 | #if MEM_OVERFLOW_CHECK || MEMP_OVERFLOW_CHECK
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50 | /* if MEM_OVERFLOW_CHECK or MEMP_OVERFLOW_CHECK is turned on, we reserve some
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51 | * bytes at the beginning and at the end of each element, initialize them as
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52 | * 0xcd and check them later.
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53 | * If MEM(P)_OVERFLOW_CHECK is >= 2, on every call to mem(p)_malloc or mem(p)_free,
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54 | * every single element in each pool/heap is checked!
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55 | * This is VERY SLOW but also very helpful.
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56 | * MEM_SANITY_REGION_BEFORE and MEM_SANITY_REGION_AFTER can be overridden in
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57 | * lwipopts.h to change the amount reserved for checking. */
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58 | #ifndef MEM_SANITY_REGION_BEFORE
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59 | #define MEM_SANITY_REGION_BEFORE 16
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60 | #endif /* MEM_SANITY_REGION_BEFORE*/
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61 | #if MEM_SANITY_REGION_BEFORE > 0
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62 | #define MEM_SANITY_REGION_BEFORE_ALIGNED LWIP_MEM_ALIGN_SIZE(MEM_SANITY_REGION_BEFORE)
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63 | #else
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64 | #define MEM_SANITY_REGION_BEFORE_ALIGNED 0
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65 | #endif /* MEM_SANITY_REGION_BEFORE*/
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66 | #ifndef MEM_SANITY_REGION_AFTER
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67 | #define MEM_SANITY_REGION_AFTER 16
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68 | #endif /* MEM_SANITY_REGION_AFTER*/
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69 | #if MEM_SANITY_REGION_AFTER > 0
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70 | #define MEM_SANITY_REGION_AFTER_ALIGNED LWIP_MEM_ALIGN_SIZE(MEM_SANITY_REGION_AFTER)
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71 | #else
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72 | #define MEM_SANITY_REGION_AFTER_ALIGNED 0
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73 | #endif /* MEM_SANITY_REGION_AFTER*/
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74 |
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75 | void mem_overflow_init_raw(void *p, size_t size);
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76 | void mem_overflow_check_raw(void *p, size_t size, const char *descr1, const char *descr2);
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77 |
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78 | #endif /* MEM_OVERFLOW_CHECK || MEMP_OVERFLOW_CHECK */
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79 |
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80 | #ifdef __cplusplus
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81 | }
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82 | #endif
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83 |
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84 | #endif /* LWIP_HDR_MEMP_PRIV_H */
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