My fork of the HTTPServer (working)
Core/lwIP/core/memp.c@1:284f2df30cf9, 2012-11-20 (annotated)
- Committer:
- screamer
- Date:
- Tue Nov 20 12:18:53 2012 +0000
- Revision:
- 1:284f2df30cf9
- Parent:
- 0:7a64fbb4069d
local changes
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
screamer | 0:7a64fbb4069d | 1 | /** |
screamer | 0:7a64fbb4069d | 2 | * @file |
screamer | 0:7a64fbb4069d | 3 | * Dynamic pool memory manager |
screamer | 0:7a64fbb4069d | 4 | * |
screamer | 0:7a64fbb4069d | 5 | * lwIP has dedicated pools for many structures (netconn, protocol control blocks, |
screamer | 0:7a64fbb4069d | 6 | * packet buffers, ...). All these pools are managed here. |
screamer | 0:7a64fbb4069d | 7 | */ |
screamer | 0:7a64fbb4069d | 8 | |
screamer | 0:7a64fbb4069d | 9 | /* |
screamer | 0:7a64fbb4069d | 10 | * Copyright (c) 2001-2004 Swedish Institute of Computer Science. |
screamer | 0:7a64fbb4069d | 11 | * All rights reserved. |
screamer | 0:7a64fbb4069d | 12 | * |
screamer | 0:7a64fbb4069d | 13 | * Redistribution and use in source and binary forms, with or without modification, |
screamer | 0:7a64fbb4069d | 14 | * are permitted provided that the following conditions are met: |
screamer | 0:7a64fbb4069d | 15 | * |
screamer | 0:7a64fbb4069d | 16 | * 1. Redistributions of source code must retain the above copyright notice, |
screamer | 0:7a64fbb4069d | 17 | * this list of conditions and the following disclaimer. |
screamer | 0:7a64fbb4069d | 18 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
screamer | 0:7a64fbb4069d | 19 | * this list of conditions and the following disclaimer in the documentation |
screamer | 0:7a64fbb4069d | 20 | * and/or other materials provided with the distribution. |
screamer | 0:7a64fbb4069d | 21 | * 3. The name of the author may not be used to endorse or promote products |
screamer | 0:7a64fbb4069d | 22 | * derived from this software without specific prior written permission. |
screamer | 0:7a64fbb4069d | 23 | * |
screamer | 0:7a64fbb4069d | 24 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
screamer | 0:7a64fbb4069d | 25 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
screamer | 0:7a64fbb4069d | 26 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT |
screamer | 0:7a64fbb4069d | 27 | * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
screamer | 0:7a64fbb4069d | 28 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT |
screamer | 0:7a64fbb4069d | 29 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
screamer | 0:7a64fbb4069d | 30 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
screamer | 0:7a64fbb4069d | 31 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
screamer | 0:7a64fbb4069d | 32 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY |
screamer | 0:7a64fbb4069d | 33 | * OF SUCH DAMAGE. |
screamer | 0:7a64fbb4069d | 34 | * |
screamer | 0:7a64fbb4069d | 35 | * This file is part of the lwIP TCP/IP stack. |
screamer | 0:7a64fbb4069d | 36 | * |
screamer | 0:7a64fbb4069d | 37 | * Author: Adam Dunkels <adam@sics.se> |
screamer | 0:7a64fbb4069d | 38 | * |
screamer | 0:7a64fbb4069d | 39 | */ |
screamer | 0:7a64fbb4069d | 40 | |
screamer | 0:7a64fbb4069d | 41 | #include "lwip/opt.h" |
screamer | 0:7a64fbb4069d | 42 | |
screamer | 0:7a64fbb4069d | 43 | #include "lwip/memp.h" |
screamer | 0:7a64fbb4069d | 44 | #include "lwip/pbuf.h" |
screamer | 0:7a64fbb4069d | 45 | #include "lwip/udp.h" |
screamer | 0:7a64fbb4069d | 46 | #include "lwip/raw.h" |
screamer | 0:7a64fbb4069d | 47 | #include "lwip/tcp.h" |
screamer | 0:7a64fbb4069d | 48 | #include "lwip/igmp.h" |
screamer | 0:7a64fbb4069d | 49 | #include "lwip/api.h" |
screamer | 0:7a64fbb4069d | 50 | #include "lwip/api_msg.h" |
screamer | 0:7a64fbb4069d | 51 | #include "lwip/tcpip.h" |
screamer | 0:7a64fbb4069d | 52 | #include "lwip/sys.h" |
screamer | 0:7a64fbb4069d | 53 | #include "lwip/stats.h" |
screamer | 0:7a64fbb4069d | 54 | #include "netif/etharp.h" |
screamer | 0:7a64fbb4069d | 55 | #include "lwip/ip_frag.h" |
screamer | 0:7a64fbb4069d | 56 | |
screamer | 0:7a64fbb4069d | 57 | #include <string.h> |
screamer | 0:7a64fbb4069d | 58 | |
screamer | 0:7a64fbb4069d | 59 | #if !MEMP_MEM_MALLOC /* don't build if not configured for use in lwipopts.h */ |
screamer | 0:7a64fbb4069d | 60 | |
screamer | 0:7a64fbb4069d | 61 | struct memp { |
screamer | 0:7a64fbb4069d | 62 | struct memp *next; |
screamer | 0:7a64fbb4069d | 63 | #if MEMP_OVERFLOW_CHECK |
screamer | 0:7a64fbb4069d | 64 | const char *file; |
screamer | 0:7a64fbb4069d | 65 | int line; |
screamer | 0:7a64fbb4069d | 66 | #endif /* MEMP_OVERFLOW_CHECK */ |
screamer | 0:7a64fbb4069d | 67 | }; |
screamer | 0:7a64fbb4069d | 68 | |
screamer | 0:7a64fbb4069d | 69 | #if MEMP_OVERFLOW_CHECK |
screamer | 0:7a64fbb4069d | 70 | /* if MEMP_OVERFLOW_CHECK is turned on, we reserve some bytes at the beginning |
screamer | 0:7a64fbb4069d | 71 | * and at the end of each element, initialize them as 0xcd and check |
screamer | 0:7a64fbb4069d | 72 | * them later. */ |
screamer | 0:7a64fbb4069d | 73 | /* If MEMP_OVERFLOW_CHECK is >= 2, on every call to memp_malloc or memp_free, |
screamer | 0:7a64fbb4069d | 74 | * every single element in each pool is checked! |
screamer | 0:7a64fbb4069d | 75 | * This is VERY SLOW but also very helpful. */ |
screamer | 0:7a64fbb4069d | 76 | /* MEMP_SANITY_REGION_BEFORE and MEMP_SANITY_REGION_AFTER can be overridden in |
screamer | 0:7a64fbb4069d | 77 | * lwipopts.h to change the amount reserved for checking. */ |
screamer | 0:7a64fbb4069d | 78 | #ifndef MEMP_SANITY_REGION_BEFORE |
screamer | 0:7a64fbb4069d | 79 | #define MEMP_SANITY_REGION_BEFORE 16 |
screamer | 0:7a64fbb4069d | 80 | #endif /* MEMP_SANITY_REGION_BEFORE*/ |
screamer | 0:7a64fbb4069d | 81 | #if MEMP_SANITY_REGION_BEFORE > 0 |
screamer | 0:7a64fbb4069d | 82 | #define MEMP_SANITY_REGION_BEFORE_ALIGNED LWIP_MEM_ALIGN_SIZE(MEMP_SANITY_REGION_BEFORE) |
screamer | 0:7a64fbb4069d | 83 | #else |
screamer | 0:7a64fbb4069d | 84 | #define MEMP_SANITY_REGION_BEFORE_ALIGNED 0 |
screamer | 0:7a64fbb4069d | 85 | #endif /* MEMP_SANITY_REGION_BEFORE*/ |
screamer | 0:7a64fbb4069d | 86 | #ifndef MEMP_SANITY_REGION_AFTER |
screamer | 0:7a64fbb4069d | 87 | #define MEMP_SANITY_REGION_AFTER 16 |
screamer | 0:7a64fbb4069d | 88 | #endif /* MEMP_SANITY_REGION_AFTER*/ |
screamer | 0:7a64fbb4069d | 89 | #if MEMP_SANITY_REGION_AFTER > 0 |
screamer | 0:7a64fbb4069d | 90 | #define MEMP_SANITY_REGION_AFTER_ALIGNED LWIP_MEM_ALIGN_SIZE(MEMP_SANITY_REGION_AFTER) |
screamer | 0:7a64fbb4069d | 91 | #else |
screamer | 0:7a64fbb4069d | 92 | #define MEMP_SANITY_REGION_AFTER_ALIGNED 0 |
screamer | 0:7a64fbb4069d | 93 | #endif /* MEMP_SANITY_REGION_AFTER*/ |
screamer | 0:7a64fbb4069d | 94 | |
screamer | 0:7a64fbb4069d | 95 | /* MEMP_SIZE: save space for struct memp and for sanity check */ |
screamer | 0:7a64fbb4069d | 96 | #define MEMP_SIZE (LWIP_MEM_ALIGN_SIZE(sizeof(struct memp)) + MEMP_SANITY_REGION_BEFORE_ALIGNED) |
screamer | 0:7a64fbb4069d | 97 | #define MEMP_ALIGN_SIZE(x) (LWIP_MEM_ALIGN_SIZE(x) + MEMP_SANITY_REGION_AFTER_ALIGNED) |
screamer | 0:7a64fbb4069d | 98 | |
screamer | 0:7a64fbb4069d | 99 | #else /* MEMP_OVERFLOW_CHECK */ |
screamer | 0:7a64fbb4069d | 100 | |
screamer | 0:7a64fbb4069d | 101 | /* No sanity checks |
screamer | 0:7a64fbb4069d | 102 | * We don't need to preserve the struct memp while not allocated, so we |
screamer | 0:7a64fbb4069d | 103 | * can save a little space and set MEMP_SIZE to 0. |
screamer | 0:7a64fbb4069d | 104 | */ |
screamer | 0:7a64fbb4069d | 105 | #define MEMP_SIZE 0 |
screamer | 0:7a64fbb4069d | 106 | #define MEMP_ALIGN_SIZE(x) (LWIP_MEM_ALIGN_SIZE(x)) |
screamer | 0:7a64fbb4069d | 107 | |
screamer | 0:7a64fbb4069d | 108 | #endif /* MEMP_OVERFLOW_CHECK */ |
screamer | 0:7a64fbb4069d | 109 | |
screamer | 0:7a64fbb4069d | 110 | /** This array holds the first free element of each pool. |
screamer | 0:7a64fbb4069d | 111 | * Elements form a linked list. */ |
screamer | 0:7a64fbb4069d | 112 | static struct memp *memp_tab[MEMP_MAX]; |
screamer | 0:7a64fbb4069d | 113 | |
screamer | 0:7a64fbb4069d | 114 | #else /* MEMP_MEM_MALLOC */ |
screamer | 0:7a64fbb4069d | 115 | |
screamer | 0:7a64fbb4069d | 116 | #define MEMP_ALIGN_SIZE(x) (LWIP_MEM_ALIGN_SIZE(x)) |
screamer | 0:7a64fbb4069d | 117 | |
screamer | 0:7a64fbb4069d | 118 | #endif /* MEMP_MEM_MALLOC */ |
screamer | 0:7a64fbb4069d | 119 | |
screamer | 0:7a64fbb4069d | 120 | /** This array holds the element sizes of each pool. */ |
screamer | 0:7a64fbb4069d | 121 | #if !MEM_USE_POOLS && !MEMP_MEM_MALLOC |
screamer | 0:7a64fbb4069d | 122 | static |
screamer | 0:7a64fbb4069d | 123 | #endif |
screamer | 0:7a64fbb4069d | 124 | const u16_t memp_sizes[MEMP_MAX] = { |
screamer | 0:7a64fbb4069d | 125 | #define LWIP_MEMPOOL(name,num,size,desc) LWIP_MEM_ALIGN_SIZE(size), |
screamer | 0:7a64fbb4069d | 126 | #include "lwip/memp_std.h" |
screamer | 0:7a64fbb4069d | 127 | }; |
screamer | 0:7a64fbb4069d | 128 | |
screamer | 0:7a64fbb4069d | 129 | #if !MEMP_MEM_MALLOC /* don't build if not configured for use in lwipopts.h */ |
screamer | 0:7a64fbb4069d | 130 | |
screamer | 0:7a64fbb4069d | 131 | /** This array holds the number of elements in each pool. */ |
screamer | 0:7a64fbb4069d | 132 | static const u16_t memp_num[MEMP_MAX] = { |
screamer | 0:7a64fbb4069d | 133 | #define LWIP_MEMPOOL(name,num,size,desc) (num), |
screamer | 0:7a64fbb4069d | 134 | #include "lwip/memp_std.h" |
screamer | 0:7a64fbb4069d | 135 | }; |
screamer | 0:7a64fbb4069d | 136 | |
screamer | 0:7a64fbb4069d | 137 | /** This array holds a textual description of each pool. */ |
screamer | 0:7a64fbb4069d | 138 | #ifdef LWIP_DEBUG |
screamer | 0:7a64fbb4069d | 139 | static const char *memp_desc[MEMP_MAX] = { |
screamer | 0:7a64fbb4069d | 140 | #define LWIP_MEMPOOL(name,num,size,desc) (desc), |
screamer | 0:7a64fbb4069d | 141 | #include "lwip/memp_std.h" |
screamer | 0:7a64fbb4069d | 142 | }; |
screamer | 0:7a64fbb4069d | 143 | #endif /* LWIP_DEBUG */ |
screamer | 0:7a64fbb4069d | 144 | |
screamer | 0:7a64fbb4069d | 145 | /** This is the actual memory used by the pools. */ |
screamer | 0:7a64fbb4069d | 146 | static u8_t memp_memory[MEM_ALIGNMENT - 1 |
screamer | 0:7a64fbb4069d | 147 | #define LWIP_MEMPOOL(name,num,size,desc) + ( (num) * (MEMP_SIZE + MEMP_ALIGN_SIZE(size) ) ) |
screamer | 0:7a64fbb4069d | 148 | #include "lwip/memp_std.h" |
screamer | 0:7a64fbb4069d | 149 | ]; |
screamer | 0:7a64fbb4069d | 150 | |
screamer | 0:7a64fbb4069d | 151 | #if MEMP_SANITY_CHECK |
screamer | 0:7a64fbb4069d | 152 | /** |
screamer | 0:7a64fbb4069d | 153 | * Check that memp-lists don't form a circle |
screamer | 0:7a64fbb4069d | 154 | */ |
screamer | 0:7a64fbb4069d | 155 | static int |
screamer | 0:7a64fbb4069d | 156 | memp_sanity(void) |
screamer | 0:7a64fbb4069d | 157 | { |
screamer | 0:7a64fbb4069d | 158 | s16_t i, c; |
screamer | 0:7a64fbb4069d | 159 | struct memp *m, *n; |
screamer | 0:7a64fbb4069d | 160 | |
screamer | 0:7a64fbb4069d | 161 | for (i = 0; i < MEMP_MAX; i++) { |
screamer | 0:7a64fbb4069d | 162 | for (m = memp_tab[i]; m != NULL; m = m->next) { |
screamer | 0:7a64fbb4069d | 163 | c = 1; |
screamer | 0:7a64fbb4069d | 164 | for (n = memp_tab[i]; n != NULL; n = n->next) { |
screamer | 0:7a64fbb4069d | 165 | if (n == m && --c < 0) { |
screamer | 0:7a64fbb4069d | 166 | return 0; |
screamer | 0:7a64fbb4069d | 167 | } |
screamer | 0:7a64fbb4069d | 168 | } |
screamer | 0:7a64fbb4069d | 169 | } |
screamer | 0:7a64fbb4069d | 170 | } |
screamer | 0:7a64fbb4069d | 171 | return 1; |
screamer | 0:7a64fbb4069d | 172 | } |
screamer | 0:7a64fbb4069d | 173 | #endif /* MEMP_SANITY_CHECK*/ |
screamer | 0:7a64fbb4069d | 174 | #if MEMP_OVERFLOW_CHECK |
screamer | 0:7a64fbb4069d | 175 | /** |
screamer | 0:7a64fbb4069d | 176 | * Check if a memp element was victim of an overflow |
screamer | 0:7a64fbb4069d | 177 | * (e.g. the restricted area after it has been altered) |
screamer | 0:7a64fbb4069d | 178 | * |
screamer | 0:7a64fbb4069d | 179 | * @param p the memp element to check |
screamer | 0:7a64fbb4069d | 180 | * @param memp_size the element size of the pool p comes from |
screamer | 0:7a64fbb4069d | 181 | */ |
screamer | 0:7a64fbb4069d | 182 | static void |
screamer | 0:7a64fbb4069d | 183 | memp_overflow_check_element(struct memp *p, u16_t memp_size) |
screamer | 0:7a64fbb4069d | 184 | { |
screamer | 0:7a64fbb4069d | 185 | u16_t k; |
screamer | 0:7a64fbb4069d | 186 | u8_t *m; |
screamer | 0:7a64fbb4069d | 187 | #if MEMP_SANITY_REGION_BEFORE_ALIGNED > 0 |
screamer | 0:7a64fbb4069d | 188 | m = (u8_t*)p + MEMP_SIZE - MEMP_SANITY_REGION_BEFORE_ALIGNED; |
screamer | 0:7a64fbb4069d | 189 | for (k = 0; k < MEMP_SANITY_REGION_BEFORE_ALIGNED; k++) { |
screamer | 0:7a64fbb4069d | 190 | if (m[k] != 0xcd) { |
screamer | 0:7a64fbb4069d | 191 | LWIP_ASSERT("detected memp underflow!", 0); |
screamer | 0:7a64fbb4069d | 192 | } |
screamer | 0:7a64fbb4069d | 193 | } |
screamer | 0:7a64fbb4069d | 194 | #endif |
screamer | 0:7a64fbb4069d | 195 | #if MEMP_SANITY_REGION_AFTER_ALIGNED > 0 |
screamer | 0:7a64fbb4069d | 196 | m = (u8_t*)p + MEMP_SIZE + memp_size; |
screamer | 0:7a64fbb4069d | 197 | for (k = 0; k < MEMP_SANITY_REGION_AFTER_ALIGNED; k++) { |
screamer | 0:7a64fbb4069d | 198 | if (m[k] != 0xcd) { |
screamer | 0:7a64fbb4069d | 199 | LWIP_ASSERT("detected memp overflow!", 0); |
screamer | 0:7a64fbb4069d | 200 | } |
screamer | 0:7a64fbb4069d | 201 | } |
screamer | 0:7a64fbb4069d | 202 | #endif |
screamer | 0:7a64fbb4069d | 203 | } |
screamer | 0:7a64fbb4069d | 204 | |
screamer | 0:7a64fbb4069d | 205 | /** |
screamer | 0:7a64fbb4069d | 206 | * Do an overflow check for all elements in every pool. |
screamer | 0:7a64fbb4069d | 207 | * |
screamer | 0:7a64fbb4069d | 208 | * @see memp_overflow_check_element for a description of the check |
screamer | 0:7a64fbb4069d | 209 | */ |
screamer | 0:7a64fbb4069d | 210 | static void |
screamer | 0:7a64fbb4069d | 211 | memp_overflow_check_all(void) |
screamer | 0:7a64fbb4069d | 212 | { |
screamer | 0:7a64fbb4069d | 213 | u16_t i, j; |
screamer | 0:7a64fbb4069d | 214 | struct memp *p; |
screamer | 0:7a64fbb4069d | 215 | |
screamer | 0:7a64fbb4069d | 216 | p = LWIP_MEM_ALIGN(memp_memory); |
screamer | 0:7a64fbb4069d | 217 | for (i = 0; i < MEMP_MAX; ++i) { |
screamer | 0:7a64fbb4069d | 218 | p = p; |
screamer | 0:7a64fbb4069d | 219 | for (j = 0; j < memp_num[i]; ++j) { |
screamer | 0:7a64fbb4069d | 220 | memp_overflow_check_element(p, memp_sizes[i]); |
screamer | 0:7a64fbb4069d | 221 | p = (struct memp*)((u8_t*)p + MEMP_SIZE + memp_sizes[i] + MEMP_SANITY_REGION_AFTER_ALIGNED); |
screamer | 0:7a64fbb4069d | 222 | } |
screamer | 0:7a64fbb4069d | 223 | } |
screamer | 0:7a64fbb4069d | 224 | } |
screamer | 0:7a64fbb4069d | 225 | |
screamer | 0:7a64fbb4069d | 226 | /** |
screamer | 0:7a64fbb4069d | 227 | * Initialize the restricted areas of all memp elements in every pool. |
screamer | 0:7a64fbb4069d | 228 | */ |
screamer | 0:7a64fbb4069d | 229 | static void |
screamer | 0:7a64fbb4069d | 230 | memp_overflow_init(void) |
screamer | 0:7a64fbb4069d | 231 | { |
screamer | 0:7a64fbb4069d | 232 | u16_t i, j; |
screamer | 0:7a64fbb4069d | 233 | struct memp *p; |
screamer | 0:7a64fbb4069d | 234 | u8_t *m; |
screamer | 0:7a64fbb4069d | 235 | |
screamer | 0:7a64fbb4069d | 236 | p = LWIP_MEM_ALIGN(memp_memory); |
screamer | 0:7a64fbb4069d | 237 | for (i = 0; i < MEMP_MAX; ++i) { |
screamer | 0:7a64fbb4069d | 238 | p = p; |
screamer | 0:7a64fbb4069d | 239 | for (j = 0; j < memp_num[i]; ++j) { |
screamer | 0:7a64fbb4069d | 240 | #if MEMP_SANITY_REGION_BEFORE_ALIGNED > 0 |
screamer | 0:7a64fbb4069d | 241 | m = (u8_t*)p + MEMP_SIZE - MEMP_SANITY_REGION_BEFORE_ALIGNED; |
screamer | 0:7a64fbb4069d | 242 | memset(m, 0xcd, MEMP_SANITY_REGION_BEFORE_ALIGNED); |
screamer | 0:7a64fbb4069d | 243 | #endif |
screamer | 0:7a64fbb4069d | 244 | #if MEMP_SANITY_REGION_AFTER_ALIGNED > 0 |
screamer | 0:7a64fbb4069d | 245 | m = (u8_t*)p + MEMP_SIZE + memp_sizes[i]; |
screamer | 0:7a64fbb4069d | 246 | memset(m, 0xcd, MEMP_SANITY_REGION_AFTER_ALIGNED); |
screamer | 0:7a64fbb4069d | 247 | #endif |
screamer | 0:7a64fbb4069d | 248 | p = (struct memp*)((u8_t*)p + MEMP_SIZE + memp_sizes[i] + MEMP_SANITY_REGION_AFTER_ALIGNED); |
screamer | 0:7a64fbb4069d | 249 | } |
screamer | 0:7a64fbb4069d | 250 | } |
screamer | 0:7a64fbb4069d | 251 | } |
screamer | 0:7a64fbb4069d | 252 | #endif /* MEMP_OVERFLOW_CHECK */ |
screamer | 0:7a64fbb4069d | 253 | |
screamer | 0:7a64fbb4069d | 254 | /** |
screamer | 0:7a64fbb4069d | 255 | * Initialize this module. |
screamer | 0:7a64fbb4069d | 256 | * |
screamer | 0:7a64fbb4069d | 257 | * Carves out memp_memory into linked lists for each pool-type. |
screamer | 0:7a64fbb4069d | 258 | */ |
screamer | 0:7a64fbb4069d | 259 | void |
screamer | 0:7a64fbb4069d | 260 | memp_init(void) |
screamer | 0:7a64fbb4069d | 261 | { |
screamer | 0:7a64fbb4069d | 262 | struct memp *memp; |
screamer | 0:7a64fbb4069d | 263 | u16_t i, j; |
screamer | 0:7a64fbb4069d | 264 | |
screamer | 0:7a64fbb4069d | 265 | for (i = 0; i < MEMP_MAX; ++i) { |
screamer | 0:7a64fbb4069d | 266 | MEMP_STATS_AVAIL(used, i, 0); |
screamer | 0:7a64fbb4069d | 267 | MEMP_STATS_AVAIL(max, i, 0); |
screamer | 0:7a64fbb4069d | 268 | MEMP_STATS_AVAIL(err, i, 0); |
screamer | 0:7a64fbb4069d | 269 | MEMP_STATS_AVAIL(avail, i, memp_num[i]); |
screamer | 0:7a64fbb4069d | 270 | } |
screamer | 0:7a64fbb4069d | 271 | |
screamer | 0:7a64fbb4069d | 272 | memp = (struct memp *)LWIP_MEM_ALIGN(memp_memory); |
screamer | 0:7a64fbb4069d | 273 | /* for every pool: */ |
screamer | 0:7a64fbb4069d | 274 | for (i = 0; i < MEMP_MAX; ++i) { |
screamer | 0:7a64fbb4069d | 275 | memp_tab[i] = NULL; |
screamer | 0:7a64fbb4069d | 276 | /* create a linked list of memp elements */ |
screamer | 0:7a64fbb4069d | 277 | for (j = 0; j < memp_num[i]; ++j) { |
screamer | 0:7a64fbb4069d | 278 | memp->next = memp_tab[i]; |
screamer | 0:7a64fbb4069d | 279 | memp_tab[i] = memp; |
screamer | 0:7a64fbb4069d | 280 | memp = (struct memp *)((u8_t *)memp + MEMP_SIZE + memp_sizes[i] |
screamer | 0:7a64fbb4069d | 281 | #if MEMP_OVERFLOW_CHECK |
screamer | 0:7a64fbb4069d | 282 | + MEMP_SANITY_REGION_AFTER_ALIGNED |
screamer | 0:7a64fbb4069d | 283 | #endif |
screamer | 0:7a64fbb4069d | 284 | ); |
screamer | 0:7a64fbb4069d | 285 | } |
screamer | 0:7a64fbb4069d | 286 | } |
screamer | 0:7a64fbb4069d | 287 | #if MEMP_OVERFLOW_CHECK |
screamer | 0:7a64fbb4069d | 288 | memp_overflow_init(); |
screamer | 0:7a64fbb4069d | 289 | /* check everything a first time to see if it worked */ |
screamer | 0:7a64fbb4069d | 290 | memp_overflow_check_all(); |
screamer | 0:7a64fbb4069d | 291 | #endif /* MEMP_OVERFLOW_CHECK */ |
screamer | 0:7a64fbb4069d | 292 | } |
screamer | 0:7a64fbb4069d | 293 | |
screamer | 0:7a64fbb4069d | 294 | /** |
screamer | 0:7a64fbb4069d | 295 | * Get an element from a specific pool. |
screamer | 0:7a64fbb4069d | 296 | * |
screamer | 0:7a64fbb4069d | 297 | * @param type the pool to get an element from |
screamer | 0:7a64fbb4069d | 298 | * |
screamer | 0:7a64fbb4069d | 299 | * the debug version has two more parameters: |
screamer | 0:7a64fbb4069d | 300 | * @param file file name calling this function |
screamer | 0:7a64fbb4069d | 301 | * @param line number of line where this function is called |
screamer | 0:7a64fbb4069d | 302 | * |
screamer | 0:7a64fbb4069d | 303 | * @return a pointer to the allocated memory or a NULL pointer on error |
screamer | 0:7a64fbb4069d | 304 | */ |
screamer | 0:7a64fbb4069d | 305 | void * |
screamer | 0:7a64fbb4069d | 306 | #if !MEMP_OVERFLOW_CHECK |
screamer | 0:7a64fbb4069d | 307 | memp_malloc(memp_t type) |
screamer | 0:7a64fbb4069d | 308 | #else |
screamer | 0:7a64fbb4069d | 309 | memp_malloc_fn(memp_t type, const char* file, const int line) |
screamer | 0:7a64fbb4069d | 310 | #endif |
screamer | 0:7a64fbb4069d | 311 | { |
screamer | 0:7a64fbb4069d | 312 | struct memp *memp; |
screamer | 0:7a64fbb4069d | 313 | SYS_ARCH_DECL_PROTECT(old_level); |
screamer | 0:7a64fbb4069d | 314 | |
screamer | 0:7a64fbb4069d | 315 | LWIP_ERROR("memp_malloc: type < MEMP_MAX", (type < MEMP_MAX), return NULL;); |
screamer | 0:7a64fbb4069d | 316 | |
screamer | 0:7a64fbb4069d | 317 | SYS_ARCH_PROTECT(old_level); |
screamer | 0:7a64fbb4069d | 318 | #if MEMP_OVERFLOW_CHECK >= 2 |
screamer | 0:7a64fbb4069d | 319 | memp_overflow_check_all(); |
screamer | 0:7a64fbb4069d | 320 | #endif /* MEMP_OVERFLOW_CHECK >= 2 */ |
screamer | 0:7a64fbb4069d | 321 | |
screamer | 0:7a64fbb4069d | 322 | memp = memp_tab[type]; |
screamer | 0:7a64fbb4069d | 323 | |
screamer | 0:7a64fbb4069d | 324 | if (memp != NULL) { |
screamer | 0:7a64fbb4069d | 325 | memp_tab[type] = memp->next; |
screamer | 0:7a64fbb4069d | 326 | #if MEMP_OVERFLOW_CHECK |
screamer | 0:7a64fbb4069d | 327 | memp->next = NULL; |
screamer | 0:7a64fbb4069d | 328 | memp->file = file; |
screamer | 0:7a64fbb4069d | 329 | memp->line = line; |
screamer | 0:7a64fbb4069d | 330 | #endif /* MEMP_OVERFLOW_CHECK */ |
screamer | 0:7a64fbb4069d | 331 | MEMP_STATS_INC_USED(used, type); |
screamer | 0:7a64fbb4069d | 332 | LWIP_ASSERT("memp_malloc: memp properly aligned", |
screamer | 0:7a64fbb4069d | 333 | ((mem_ptr_t)memp % MEM_ALIGNMENT) == 0); |
screamer | 0:7a64fbb4069d | 334 | memp = (struct memp*)((u8_t*)memp + MEMP_SIZE); |
screamer | 0:7a64fbb4069d | 335 | } else { |
screamer | 0:7a64fbb4069d | 336 | LWIP_DEBUGF(MEMP_DEBUG | 2, ("memp_malloc: out of memory in pool %s\n", memp_desc[type])); |
screamer | 0:7a64fbb4069d | 337 | MEMP_STATS_INC(err, type); |
screamer | 0:7a64fbb4069d | 338 | } |
screamer | 0:7a64fbb4069d | 339 | |
screamer | 0:7a64fbb4069d | 340 | SYS_ARCH_UNPROTECT(old_level); |
screamer | 0:7a64fbb4069d | 341 | |
screamer | 0:7a64fbb4069d | 342 | return memp; |
screamer | 0:7a64fbb4069d | 343 | } |
screamer | 0:7a64fbb4069d | 344 | |
screamer | 0:7a64fbb4069d | 345 | /** |
screamer | 0:7a64fbb4069d | 346 | * Put an element back into its pool. |
screamer | 0:7a64fbb4069d | 347 | * |
screamer | 0:7a64fbb4069d | 348 | * @param type the pool where to put mem |
screamer | 0:7a64fbb4069d | 349 | * @param mem the memp element to free |
screamer | 0:7a64fbb4069d | 350 | */ |
screamer | 0:7a64fbb4069d | 351 | void |
screamer | 0:7a64fbb4069d | 352 | memp_free(memp_t type, void *mem) |
screamer | 0:7a64fbb4069d | 353 | { |
screamer | 0:7a64fbb4069d | 354 | struct memp *memp; |
screamer | 0:7a64fbb4069d | 355 | SYS_ARCH_DECL_PROTECT(old_level); |
screamer | 0:7a64fbb4069d | 356 | |
screamer | 0:7a64fbb4069d | 357 | if (mem == NULL) { |
screamer | 0:7a64fbb4069d | 358 | return; |
screamer | 0:7a64fbb4069d | 359 | } |
screamer | 0:7a64fbb4069d | 360 | LWIP_ASSERT("memp_free: mem properly aligned", |
screamer | 0:7a64fbb4069d | 361 | ((mem_ptr_t)mem % MEM_ALIGNMENT) == 0); |
screamer | 0:7a64fbb4069d | 362 | |
screamer | 0:7a64fbb4069d | 363 | memp = (struct memp *)((u8_t*)mem - MEMP_SIZE); |
screamer | 0:7a64fbb4069d | 364 | |
screamer | 0:7a64fbb4069d | 365 | SYS_ARCH_PROTECT(old_level); |
screamer | 0:7a64fbb4069d | 366 | #if MEMP_OVERFLOW_CHECK |
screamer | 0:7a64fbb4069d | 367 | #if MEMP_OVERFLOW_CHECK >= 2 |
screamer | 0:7a64fbb4069d | 368 | memp_overflow_check_all(); |
screamer | 0:7a64fbb4069d | 369 | #else |
screamer | 0:7a64fbb4069d | 370 | memp_overflow_check_element(memp, memp_sizes[type]); |
screamer | 0:7a64fbb4069d | 371 | #endif /* MEMP_OVERFLOW_CHECK >= 2 */ |
screamer | 0:7a64fbb4069d | 372 | #endif /* MEMP_OVERFLOW_CHECK */ |
screamer | 0:7a64fbb4069d | 373 | |
screamer | 0:7a64fbb4069d | 374 | MEMP_STATS_DEC(used, type); |
screamer | 0:7a64fbb4069d | 375 | |
screamer | 0:7a64fbb4069d | 376 | memp->next = memp_tab[type]; |
screamer | 0:7a64fbb4069d | 377 | memp_tab[type] = memp; |
screamer | 0:7a64fbb4069d | 378 | |
screamer | 0:7a64fbb4069d | 379 | #if MEMP_SANITY_CHECK |
screamer | 0:7a64fbb4069d | 380 | LWIP_ASSERT("memp sanity", memp_sanity()); |
screamer | 0:7a64fbb4069d | 381 | #endif /* MEMP_SANITY_CHECK */ |
screamer | 0:7a64fbb4069d | 382 | |
screamer | 0:7a64fbb4069d | 383 | SYS_ARCH_UNPROTECT(old_level); |
screamer | 0:7a64fbb4069d | 384 | } |
screamer | 0:7a64fbb4069d | 385 | |
screamer | 0:7a64fbb4069d | 386 | #endif /* MEMP_MEM_MALLOC */ |