mbed official / lwip

Official mbed lwIP library (version 1.4.0)

Dependents:   LwIPNetworking NetServicesMin EthernetInterface EthernetInterface_RSF ... more

Legacy Networking Libraries

This is an mbed 2 networking library. For mbed OS 5, lwip has been integrated with built-in networking interfaces. The networking libraries have been revised to better support additional network stacks and thread safety here.

This library is based on the code of lwIP v1.4.0

Copyright (c) 2001, 2002 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.

include/lwip/mem.h@20:08f08bfc3f3d, 2016-03-14 (annotated)

Committer:
mbed_official
Date:
Mon Mar 14 16:15:36 2016 +0000
Revision:
20:08f08bfc3f3d
Parent:
16:092c37b63ee8 
Synchronized with git revision fec574a5ed6db26aca1b13992ff271bf527d4a0d



Full URL: https://github.com/mbedmicro/mbed/commit/fec574a5ed6db26aca1b13992ff271bf527d4a0d/



Increased allocated netbufs to handle DTLS handshakes

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 0:51ac1d130fd4 1 /*
mbed_official 0:51ac1d130fd4 2 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
mbed_official 0:51ac1d130fd4 3 * All rights reserved.
mbed_official 0:51ac1d130fd4 4 *
mbed_official 0:51ac1d130fd4 5 * Redistribution and use in source and binary forms, with or without modification,
mbed_official 0:51ac1d130fd4 6 * are permitted provided that the following conditions are met:
mbed_official 0:51ac1d130fd4 7 *
mbed_official 0:51ac1d130fd4 8 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 0:51ac1d130fd4 9 * this list of conditions and the following disclaimer.
mbed_official 0:51ac1d130fd4 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 0:51ac1d130fd4 11 * this list of conditions and the following disclaimer in the documentation
mbed_official 0:51ac1d130fd4 12 * and/or other materials provided with the distribution.
mbed_official 0:51ac1d130fd4 13 * 3. The name of the author may not be used to endorse or promote products
mbed_official 0:51ac1d130fd4 14 * derived from this software without specific prior written permission.
mbed_official 0:51ac1d130fd4 15 *
mbed_official 0:51ac1d130fd4 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
mbed_official 0:51ac1d130fd4 17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
mbed_official 0:51ac1d130fd4 18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
mbed_official 0:51ac1d130fd4 19 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
mbed_official 0:51ac1d130fd4 20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
mbed_official 0:51ac1d130fd4 21 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
mbed_official 0:51ac1d130fd4 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
mbed_official 0:51ac1d130fd4 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
mbed_official 0:51ac1d130fd4 24 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
mbed_official 0:51ac1d130fd4 25 * OF SUCH DAMAGE.
mbed_official 0:51ac1d130fd4 26 *
mbed_official 0:51ac1d130fd4 27 * This file is part of the lwIP TCP/IP stack.
mbed_official 0:51ac1d130fd4 28 *
mbed_official 0:51ac1d130fd4 29 * Author: Adam Dunkels <adam@sics.se>
mbed_official 0:51ac1d130fd4 30 *
mbed_official 0:51ac1d130fd4 31 */
mbed_official 0:51ac1d130fd4 32 #ifndef __LWIP_MEM_H__
mbed_official 0:51ac1d130fd4 33 #define __LWIP_MEM_H__
mbed_official 0:51ac1d130fd4 34
mbed_official 0:51ac1d130fd4 35 #include "lwip/opt.h"
mbed_official 0:51ac1d130fd4 36
mbed_official 0:51ac1d130fd4 37 #ifdef __cplusplus
mbed_official 0:51ac1d130fd4 38 extern "C" {
mbed_official 0:51ac1d130fd4 39 #endif
mbed_official 0:51ac1d130fd4 40
mbed_official 0:51ac1d130fd4 41 #if MEM_LIBC_MALLOC
mbed_official 0:51ac1d130fd4 42
mbed_official 0:51ac1d130fd4 43 #include <stddef.h> /* for size_t */
mbed_official 0:51ac1d130fd4 44
mbed_official 0:51ac1d130fd4 45 typedef size_t mem_size_t;
mbed_official 0:51ac1d130fd4 46
mbed_official 0:51ac1d130fd4 47 /* aliases for C library malloc() */
mbed_official 0:51ac1d130fd4 48 #define mem_init()
mbed_official 0:51ac1d130fd4 49 /* in case C library malloc() needs extra protection,
mbed_official 0:51ac1d130fd4 50 * allow these defines to be overridden.
mbed_official 0:51ac1d130fd4 51 */
mbed_official 0:51ac1d130fd4 52 #ifndef mem_free
mbed_official 0:51ac1d130fd4 53 #define mem_free free
mbed_official 0:51ac1d130fd4 54 #endif
mbed_official 0:51ac1d130fd4 55 #ifndef mem_malloc
mbed_official 0:51ac1d130fd4 56 #define mem_malloc malloc
mbed_official 0:51ac1d130fd4 57 #endif
mbed_official 0:51ac1d130fd4 58 #ifndef mem_calloc
mbed_official 0:51ac1d130fd4 59 #define mem_calloc calloc
mbed_official 0:51ac1d130fd4 60 #endif
mbed_official 0:51ac1d130fd4 61 /* Since there is no C library allocation function to shrink memory without
mbed_official 0:51ac1d130fd4 62 moving it, define this to nothing. */
mbed_official 0:51ac1d130fd4 63 #ifndef mem_trim
mbed_official 0:51ac1d130fd4 64 #define mem_trim(mem, size) (mem)
mbed_official 0:51ac1d130fd4 65 #endif
mbed_official 0:51ac1d130fd4 66 #else /* MEM_LIBC_MALLOC */
mbed_official 0:51ac1d130fd4 67
mbed_official 0:51ac1d130fd4 68 /* MEM_SIZE would have to be aligned, but using 64000 here instead of
mbed_official 0:51ac1d130fd4 69 * 65535 leaves some room for alignment...
mbed_official 0:51ac1d130fd4 70 */
mbed_official 0:51ac1d130fd4 71 #if MEM_SIZE > 64000L
mbed_official 0:51ac1d130fd4 72 typedef u32_t mem_size_t;
mbed_official 0:51ac1d130fd4 73 #define MEM_SIZE_F U32_F
mbed_official 0:51ac1d130fd4 74 #else
mbed_official 0:51ac1d130fd4 75 typedef u16_t mem_size_t;
mbed_official 0:51ac1d130fd4 76 #define MEM_SIZE_F U16_F
mbed_official 0:51ac1d130fd4 77 #endif /* MEM_SIZE > 64000 */
mbed_official 0:51ac1d130fd4 78
mbed_official 0:51ac1d130fd4 79 #if MEM_USE_POOLS
mbed_official 0:51ac1d130fd4 80 /** mem_init is not used when using pools instead of a heap */
mbed_official 0:51ac1d130fd4 81 #define mem_init()
mbed_official 0:51ac1d130fd4 82 /** mem_trim is not used when using pools instead of a heap:
mbed_official 0:51ac1d130fd4 83 we can't free part of a pool element and don't want to copy the rest */
mbed_official 0:51ac1d130fd4 84 #define mem_trim(mem, size) (mem)
mbed_official 0:51ac1d130fd4 85 #else /* MEM_USE_POOLS */
mbed_official 0:51ac1d130fd4 86 /* lwIP alternative malloc */
mbed_official 0:51ac1d130fd4 87 void mem_init(void);
mbed_official 0:51ac1d130fd4 88 void *mem_trim(void *mem, mem_size_t size);
mbed_official 0:51ac1d130fd4 89 #endif /* MEM_USE_POOLS */
mbed_official 0:51ac1d130fd4 90 void *mem_malloc(mem_size_t size);
mbed_official 0:51ac1d130fd4 91 void *mem_calloc(mem_size_t count, mem_size_t size);
mbed_official 0:51ac1d130fd4 92 void mem_free(void *mem);
mbed_official 0:51ac1d130fd4 93 #endif /* MEM_LIBC_MALLOC */
mbed_official 0:51ac1d130fd4 94
mbed_official 0:51ac1d130fd4 95 /** Calculate memory size for an aligned buffer - returns the next highest
mbed_official 0:51ac1d130fd4 96 * multiple of MEM_ALIGNMENT (e.g. LWIP_MEM_ALIGN_SIZE(3) and
mbed_official 0:51ac1d130fd4 97 * LWIP_MEM_ALIGN_SIZE(4) will both yield 4 for MEM_ALIGNMENT == 4).
mbed_official 0:51ac1d130fd4 98 */
mbed_official 0:51ac1d130fd4 99 #ifndef LWIP_MEM_ALIGN_SIZE
mbed_official 0:51ac1d130fd4 100 #define LWIP_MEM_ALIGN_SIZE(size) (((size) + MEM_ALIGNMENT - 1) & ~(MEM_ALIGNMENT-1))
mbed_official 0:51ac1d130fd4 101 #endif
mbed_official 0:51ac1d130fd4 102
mbed_official 0:51ac1d130fd4 103 /** Calculate safe memory size for an aligned buffer when using an unaligned
mbed_official 0:51ac1d130fd4 104 * type as storage. This includes a safety-margin on (MEM_ALIGNMENT - 1) at the
mbed_official 0:51ac1d130fd4 105 * start (e.g. if buffer is u8_t[] and actual data will be u32_t*)
mbed_official 0:51ac1d130fd4 106 */
mbed_official 0:51ac1d130fd4 107 #ifndef LWIP_MEM_ALIGN_BUFFER
mbed_official 0:51ac1d130fd4 108 #define LWIP_MEM_ALIGN_BUFFER(size) (((size) + MEM_ALIGNMENT - 1))
mbed_official 0:51ac1d130fd4 109 #endif
mbed_official 0:51ac1d130fd4 110
mbed_official 0:51ac1d130fd4 111 /** Align a memory pointer to the alignment defined by MEM_ALIGNMENT
mbed_official 0:51ac1d130fd4 112 * so that ADDR % MEM_ALIGNMENT == 0
mbed_official 0:51ac1d130fd4 113 */
mbed_official 0:51ac1d130fd4 114 #ifndef LWIP_MEM_ALIGN
mbed_official 0:51ac1d130fd4 115 #define LWIP_MEM_ALIGN(addr) ((void *)(((mem_ptr_t)(addr) + MEM_ALIGNMENT - 1) & ~(mem_ptr_t)(MEM_ALIGNMENT-1)))
mbed_official 0:51ac1d130fd4 116 #endif
mbed_official 0:51ac1d130fd4 117
mbed_official 16:092c37b63ee8 118
mbed_official 0:51ac1d130fd4 119 #ifdef __cplusplus
mbed_official 0:51ac1d130fd4 120 }
mbed_official 0:51ac1d130fd4 121 #endif
mbed_official 0:51ac1d130fd4 122
mbed_official 0:51ac1d130fd4 123 #endif /* __LWIP_MEM_H__ */