source: UsbWattMeter/trunk/lwip-1.4.1/src/include/lwip/mem.h@ 164

Last change on this file since 164 was 164, checked in by coas-nagasima, 6 years ago

TOPPERS/ECNLサンプルアプリ「USB充電器電力計」を追加

  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
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File size: 4.1 KB
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1/*
2 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without modification,
6 * are permitted provided that the following conditions are met:
7 *
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
12 * and/or other materials provided with the distribution.
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.
15 *
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,
20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
21 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
24 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
25 * OF SUCH DAMAGE.
26 *
27 * This file is part of the lwIP TCP/IP stack.
28 *
29 * Author: Adam Dunkels <adam@sics.se>
30 *
31 */
32#ifndef __LWIP_MEM_H__
33#define __LWIP_MEM_H__
34
35#include "lwip/opt.h"
36
37#ifdef __cplusplus
38extern "C" {
39#endif
40
41#if MEM_LIBC_MALLOC
42
43#include <stddef.h> /* for size_t */
44
45typedef size_t mem_size_t;
46#define MEM_SIZE_F SZT_F
47
48/* aliases for C library malloc() */
49#define mem_init()
50/* in case C library malloc() needs extra protection,
51 * allow these defines to be overridden.
52 */
53#ifndef mem_free
54#define mem_free free
55#endif
56#ifndef mem_malloc
57#define mem_malloc malloc
58#endif
59#ifndef mem_calloc
60#define mem_calloc calloc
61#endif
62/* Since there is no C library allocation function to shrink memory without
63 moving it, define this to nothing. */
64#ifndef mem_trim
65#define mem_trim(mem, size) (mem)
66#endif
67#else /* MEM_LIBC_MALLOC */
68
69/* MEM_SIZE would have to be aligned, but using 64000 here instead of
70 * 65535 leaves some room for alignment...
71 */
72#if MEM_SIZE > 64000L
73typedef u32_t mem_size_t;
74#define MEM_SIZE_F U32_F
75#else
76typedef u16_t mem_size_t;
77#define MEM_SIZE_F U16_F
78#endif /* MEM_SIZE > 64000 */
79
80#if MEM_USE_POOLS
81/** mem_init is not used when using pools instead of a heap */
82#define mem_init()
83/** mem_trim is not used when using pools instead of a heap:
84 we can't free part of a pool element and don't want to copy the rest */
85#define mem_trim(mem, size) (mem)
86#else /* MEM_USE_POOLS */
87/* lwIP alternative malloc */
88void mem_init(void);
89void *mem_trim(void *mem, mem_size_t size);
90#endif /* MEM_USE_POOLS */
91void *mem_malloc(mem_size_t size);
92void *mem_calloc(mem_size_t count, mem_size_t size);
93void mem_free(void *mem);
94#endif /* MEM_LIBC_MALLOC */
95
96/** Calculate memory size for an aligned buffer - returns the next highest
97 * multiple of MEM_ALIGNMENT (e.g. LWIP_MEM_ALIGN_SIZE(3) and
98 * LWIP_MEM_ALIGN_SIZE(4) will both yield 4 for MEM_ALIGNMENT == 4).
99 */
100#ifndef LWIP_MEM_ALIGN_SIZE
101#define LWIP_MEM_ALIGN_SIZE(size) (((size) + MEM_ALIGNMENT - 1) & ~(MEM_ALIGNMENT-1))
102#endif
103
104/** Calculate safe memory size for an aligned buffer when using an unaligned
105 * type as storage. This includes a safety-margin on (MEM_ALIGNMENT - 1) at the
106 * start (e.g. if buffer is u8_t[] and actual data will be u32_t*)
107 */
108#ifndef LWIP_MEM_ALIGN_BUFFER
109#define LWIP_MEM_ALIGN_BUFFER(size) (((size) + MEM_ALIGNMENT - 1))
110#endif
111
112/** Align a memory pointer to the alignment defined by MEM_ALIGNMENT
113 * so that ADDR % MEM_ALIGNMENT == 0
114 */
115#ifndef LWIP_MEM_ALIGN
116#define LWIP_MEM_ALIGN(addr) ((void *)(((mem_ptr_t)(addr) + MEM_ALIGNMENT - 1) & ~(mem_ptr_t)(MEM_ALIGNMENT-1)))
117#endif
118
119#ifdef __cplusplus
120}
121#endif
122
123#endif /* __LWIP_MEM_H__ */
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