Donatien Garnier / lwip_ppp_ethernet

LwIP with PPP & Ethernet integration

Dependents:   NetworkingCoreLib

This is the mbed port of the LwIP stack: http://savannah.nongnu.org/projects/lwip/

It includes contributed content from NXP's port for LPCxxxx devices: http://www.lpcware.com/content/project/lightweight-ip-lwip-networking-stack

Licence

LwIP is licenced under the BSD licence: 

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.

src/include/lwip/mem.h@0:8e01dca41002, 2012-05-24 (annotated)

Committer:
donatien
Date:
Thu May 24 15:53:48 2012 +0000
Revision:
0:8e01dca41002
Merge with Emilio's LwIp

Who changed what in which revision?

UserRevisionLine numberNew contents of line
donatien 0:8e01dca41002 1 /*
donatien 0:8e01dca41002 2 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
donatien 0:8e01dca41002 3 * All rights reserved.
donatien 0:8e01dca41002 4 *
donatien 0:8e01dca41002 5 * Redistribution and use in source and binary forms, with or without modification,
donatien 0:8e01dca41002 6 * are permitted provided that the following conditions are met:
donatien 0:8e01dca41002 7 *
donatien 0:8e01dca41002 8 * 1. Redistributions of source code must retain the above copyright notice,
donatien 0:8e01dca41002 9 * this list of conditions and the following disclaimer.
donatien 0:8e01dca41002 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
donatien 0:8e01dca41002 11 * this list of conditions and the following disclaimer in the documentation
donatien 0:8e01dca41002 12 * and/or other materials provided with the distribution.
donatien 0:8e01dca41002 13 * 3. The name of the author may not be used to endorse or promote products
donatien 0:8e01dca41002 14 * derived from this software without specific prior written permission.
donatien 0:8e01dca41002 15 *
donatien 0:8e01dca41002 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
donatien 0:8e01dca41002 17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
donatien 0:8e01dca41002 18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
donatien 0:8e01dca41002 19 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
donatien 0:8e01dca41002 20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
donatien 0:8e01dca41002 21 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
donatien 0:8e01dca41002 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
donatien 0:8e01dca41002 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
donatien 0:8e01dca41002 24 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
donatien 0:8e01dca41002 25 * OF SUCH DAMAGE.
donatien 0:8e01dca41002 26 *
donatien 0:8e01dca41002 27 * This file is part of the lwIP TCP/IP stack.
donatien 0:8e01dca41002 28 *
donatien 0:8e01dca41002 29 * Author: Adam Dunkels <adam@sics.se>
donatien 0:8e01dca41002 30 *
donatien 0:8e01dca41002 31 */
donatien 0:8e01dca41002 32 #ifndef __LWIP_MEM_H__
donatien 0:8e01dca41002 33 #define __LWIP_MEM_H__
donatien 0:8e01dca41002 34
donatien 0:8e01dca41002 35 #include "lwip/opt.h"
donatien 0:8e01dca41002 36
donatien 0:8e01dca41002 37 #ifdef __cplusplus
donatien 0:8e01dca41002 38 extern "C" {
donatien 0:8e01dca41002 39 #endif
donatien 0:8e01dca41002 40
donatien 0:8e01dca41002 41 #if MEM_LIBC_MALLOC
donatien 0:8e01dca41002 42
donatien 0:8e01dca41002 43 #include <stddef.h> /* for size_t */
donatien 0:8e01dca41002 44
donatien 0:8e01dca41002 45 typedef size_t mem_size_t;
donatien 0:8e01dca41002 46
donatien 0:8e01dca41002 47 /* aliases for C library malloc() */
donatien 0:8e01dca41002 48 #define mem_init()
donatien 0:8e01dca41002 49 /* in case C library malloc() needs extra protection,
donatien 0:8e01dca41002 50 * allow these defines to be overridden.
donatien 0:8e01dca41002 51 */
donatien 0:8e01dca41002 52 #ifndef mem_free
donatien 0:8e01dca41002 53 #define mem_free free
donatien 0:8e01dca41002 54 #endif
donatien 0:8e01dca41002 55 #ifndef mem_malloc
donatien 0:8e01dca41002 56 #define mem_malloc malloc
donatien 0:8e01dca41002 57 #endif
donatien 0:8e01dca41002 58 #ifndef mem_calloc
donatien 0:8e01dca41002 59 #define mem_calloc calloc
donatien 0:8e01dca41002 60 #endif
donatien 0:8e01dca41002 61 /* Since there is no C library allocation function to shrink memory without
donatien 0:8e01dca41002 62 moving it, define this to nothing. */
donatien 0:8e01dca41002 63 #ifndef mem_trim
donatien 0:8e01dca41002 64 #define mem_trim(mem, size) (mem)
donatien 0:8e01dca41002 65 #endif
donatien 0:8e01dca41002 66 #else /* MEM_LIBC_MALLOC */
donatien 0:8e01dca41002 67
donatien 0:8e01dca41002 68 /* MEM_SIZE would have to be aligned, but using 64000 here instead of
donatien 0:8e01dca41002 69 * 65535 leaves some room for alignment...
donatien 0:8e01dca41002 70 */
donatien 0:8e01dca41002 71 #if MEM_SIZE > 64000L
donatien 0:8e01dca41002 72 typedef u32_t mem_size_t;
donatien 0:8e01dca41002 73 #define MEM_SIZE_F U32_F
donatien 0:8e01dca41002 74 #else
donatien 0:8e01dca41002 75 typedef u16_t mem_size_t;
donatien 0:8e01dca41002 76 #define MEM_SIZE_F U16_F
donatien 0:8e01dca41002 77 #endif /* MEM_SIZE > 64000 */
donatien 0:8e01dca41002 78
donatien 0:8e01dca41002 79 #if MEM_USE_POOLS
donatien 0:8e01dca41002 80 /** mem_init is not used when using pools instead of a heap */
donatien 0:8e01dca41002 81 #define mem_init()
donatien 0:8e01dca41002 82 /** mem_trim is not used when using pools instead of a heap:
donatien 0:8e01dca41002 83 we can't free part of a pool element and don't want to copy the rest */
donatien 0:8e01dca41002 84 #define mem_trim(mem, size) (mem)
donatien 0:8e01dca41002 85 #else /* MEM_USE_POOLS */
donatien 0:8e01dca41002 86 /* lwIP alternative malloc */
donatien 0:8e01dca41002 87 void mem_init(void);
donatien 0:8e01dca41002 88 void *mem_trim(void *mem, mem_size_t size);
donatien 0:8e01dca41002 89 #endif /* MEM_USE_POOLS */
donatien 0:8e01dca41002 90 void *mem_malloc(mem_size_t size);
donatien 0:8e01dca41002 91 void *mem_calloc(mem_size_t count, mem_size_t size);
donatien 0:8e01dca41002 92 void mem_free(void *mem);
donatien 0:8e01dca41002 93 #endif /* MEM_LIBC_MALLOC */
donatien 0:8e01dca41002 94
donatien 0:8e01dca41002 95 /** Calculate memory size for an aligned buffer - returns the next highest
donatien 0:8e01dca41002 96 * multiple of MEM_ALIGNMENT (e.g. LWIP_MEM_ALIGN_SIZE(3) and
donatien 0:8e01dca41002 97 * LWIP_MEM_ALIGN_SIZE(4) will both yield 4 for MEM_ALIGNMENT == 4).
donatien 0:8e01dca41002 98 */
donatien 0:8e01dca41002 99 #ifndef LWIP_MEM_ALIGN_SIZE
donatien 0:8e01dca41002 100 #define LWIP_MEM_ALIGN_SIZE(size) (((size) + MEM_ALIGNMENT - 1) & ~(MEM_ALIGNMENT-1))
donatien 0:8e01dca41002 101 #endif
donatien 0:8e01dca41002 102
donatien 0:8e01dca41002 103 /** Calculate safe memory size for an aligned buffer when using an unaligned
donatien 0:8e01dca41002 104 * type as storage. This includes a safety-margin on (MEM_ALIGNMENT - 1) at the
donatien 0:8e01dca41002 105 * start (e.g. if buffer is u8_t[] and actual data will be u32_t*)
donatien 0:8e01dca41002 106 */
donatien 0:8e01dca41002 107 #ifndef LWIP_MEM_ALIGN_BUFFER
donatien 0:8e01dca41002 108 #define LWIP_MEM_ALIGN_BUFFER(size) (((size) + MEM_ALIGNMENT - 1))
donatien 0:8e01dca41002 109 #endif
donatien 0:8e01dca41002 110
donatien 0:8e01dca41002 111 /** Align a memory pointer to the alignment defined by MEM_ALIGNMENT
donatien 0:8e01dca41002 112 * so that ADDR % MEM_ALIGNMENT == 0
donatien 0:8e01dca41002 113 */
donatien 0:8e01dca41002 114 #ifndef LWIP_MEM_ALIGN
donatien 0:8e01dca41002 115 #define LWIP_MEM_ALIGN(addr) ((void *)(((mem_ptr_t)(addr) + MEM_ALIGNMENT - 1) & ~(mem_ptr_t)(MEM_ALIGNMENT-1)))
donatien 0:8e01dca41002 116 #endif
donatien 0:8e01dca41002 117
donatien 0:8e01dca41002 118 #ifdef __cplusplus
donatien 0:8e01dca41002 119 }
donatien 0:8e01dca41002 120 #endif
donatien 0:8e01dca41002 121
donatien 0:8e01dca41002 122 #endif /* __LWIP_MEM_H__ */