2 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
5 * Redistribution and use in source and binary forms, with or without modification,
6 * are permitted provided that the following conditions are met:
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
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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.
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,
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21 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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27 * This file is part of the lwIP TCP/IP stack.
29 * Author: Adam Dunkels <adam@sics.se>
32 #ifndef __LWIP_MEM_H__
33 #define __LWIP_MEM_H__
36 #include "lwip/arch.h"
42 /* MEM_SIZE would have to be aligned, but using 64000 here instead of
43 * 65535 leaves some room for alignment...
46 typedef u32_t mem_size_t;
47 #define MEM_SIZE_F U32_F
49 typedef u16_t mem_size_t;
50 #define MEM_SIZE_F U16_F
51 #endif /* MEM_SIZE > 64000 */
54 /* aliases for C library malloc() */
56 /* in case C library malloc() needs extra protection,
57 * allow these defines to be overridden.
60 #define mem_free(x) free(x)
63 #define mem_malloc(x) malloc(x)
66 #define mem_calloc(x, y) calloc(x, y)
69 #define mem_realloc(x, size) realloc(x,size)
71 #else /* MEM_LIBC_MALLOC */
73 /** The pool implementation of the heap currently uses 4 pools */
74 #define MEM_POOL_COUNT 4
75 /** mem_init is not used when using pools instead of a heap */
77 /** mem_realloc is not used when using pools instead of a heap:
78 we can't free part of a pool element and don't want to copy the rest */
79 #define mem_realloc(mem, size) (mem)
80 #else /* MEM_USE_POOLS */
81 /* lwIP alternative malloc */
83 void *mem_realloc(void *mem, mem_size_t size);
84 #endif /* MEM_USE_POOLS */
85 void *mem_malloc(mem_size_t size);
86 void *mem_calloc(size_t count, size_t size);
87 void mem_free(void *mem);
88 #endif /* MEM_LIBC_MALLOC */
90 #ifndef LWIP_MEM_ALIGN_SIZE
91 #define LWIP_MEM_ALIGN_SIZE(size) (((size) + MEM_ALIGNMENT - 1) & ~(MEM_ALIGNMENT-1))
94 #ifndef LWIP_MEM_ALIGN
95 #define LWIP_MEM_ALIGN(addr) ((void *)(((mem_ptr_t)(addr) + MEM_ALIGNMENT - 1) & ~(mem_ptr_t)(MEM_ALIGNMENT-1)))
102 #endif /* __LWIP_MEM_H__ */