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core/memp.c@0:51ac1d130fd4, 2012-06-22 (annotated)

Committer:
mbed_official
Date:
Fri Jun 22 09:25:39 2012 +0000
Revision:
0:51ac1d130fd4
Child:
2:fcd6ac34b3f8
Initial import from lwip-1.4.0: http://download.savannah.gnu.org/releases/lwip/lwip-1.4.0.zip

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 0:51ac1d130fd4 1 /**
mbed_official 0:51ac1d130fd4 2 * @file
mbed_official 0:51ac1d130fd4 3 * Dynamic pool memory manager
mbed_official 0:51ac1d130fd4 4 *
mbed_official 0:51ac1d130fd4 5 * lwIP has dedicated pools for many structures (netconn, protocol control blocks,
mbed_official 0:51ac1d130fd4 6 * packet buffers, ...). All these pools are managed here.
mbed_official 0:51ac1d130fd4 7 */
mbed_official 0:51ac1d130fd4 8
mbed_official 0:51ac1d130fd4 9 /*
mbed_official 0:51ac1d130fd4 10 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
mbed_official 0:51ac1d130fd4 11 * All rights reserved.
mbed_official 0:51ac1d130fd4 12 *
mbed_official 0:51ac1d130fd4 13 * Redistribution and use in source and binary forms, with or without modification,
mbed_official 0:51ac1d130fd4 14 * are permitted provided that the following conditions are met:
mbed_official 0:51ac1d130fd4 15 *
mbed_official 0:51ac1d130fd4 16 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 0:51ac1d130fd4 17 * this list of conditions and the following disclaimer.
mbed_official 0:51ac1d130fd4 18 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 0:51ac1d130fd4 19 * this list of conditions and the following disclaimer in the documentation
mbed_official 0:51ac1d130fd4 20 * and/or other materials provided with the distribution.
mbed_official 0:51ac1d130fd4 21 * 3. The name of the author may not be used to endorse or promote products
mbed_official 0:51ac1d130fd4 22 * derived from this software without specific prior written permission.
mbed_official 0:51ac1d130fd4 23 *
mbed_official 0:51ac1d130fd4 24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
mbed_official 0:51ac1d130fd4 25 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
mbed_official 0:51ac1d130fd4 26 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
mbed_official 0:51ac1d130fd4 27 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
mbed_official 0:51ac1d130fd4 28 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
mbed_official 0:51ac1d130fd4 29 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
mbed_official 0:51ac1d130fd4 30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
mbed_official 0:51ac1d130fd4 31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
mbed_official 0:51ac1d130fd4 32 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
mbed_official 0:51ac1d130fd4 33 * OF SUCH DAMAGE.
mbed_official 0:51ac1d130fd4 34 *
mbed_official 0:51ac1d130fd4 35 * This file is part of the lwIP TCP/IP stack.
mbed_official 0:51ac1d130fd4 36 *
mbed_official 0:51ac1d130fd4 37 * Author: Adam Dunkels <adam@sics.se>
mbed_official 0:51ac1d130fd4 38 *
mbed_official 0:51ac1d130fd4 39 */
mbed_official 0:51ac1d130fd4 40
mbed_official 0:51ac1d130fd4 41 #include "lwip/opt.h"
mbed_official 0:51ac1d130fd4 42
mbed_official 0:51ac1d130fd4 43 #include "lwip/memp.h"
mbed_official 0:51ac1d130fd4 44 #include "lwip/pbuf.h"
mbed_official 0:51ac1d130fd4 45 #include "lwip/udp.h"
mbed_official 0:51ac1d130fd4 46 #include "lwip/raw.h"
mbed_official 0:51ac1d130fd4 47 #include "lwip/tcp_impl.h"
mbed_official 0:51ac1d130fd4 48 #include "lwip/igmp.h"
mbed_official 0:51ac1d130fd4 49 #include "lwip/api.h"
mbed_official 0:51ac1d130fd4 50 #include "lwip/api_msg.h"
mbed_official 0:51ac1d130fd4 51 #include "lwip/tcpip.h"
mbed_official 0:51ac1d130fd4 52 #include "lwip/sys.h"
mbed_official 0:51ac1d130fd4 53 #include "lwip/timers.h"
mbed_official 0:51ac1d130fd4 54 #include "lwip/stats.h"
mbed_official 0:51ac1d130fd4 55 #include "netif/etharp.h"
mbed_official 0:51ac1d130fd4 56 #include "lwip/ip_frag.h"
mbed_official 0:51ac1d130fd4 57 #include "lwip/snmp_structs.h"
mbed_official 0:51ac1d130fd4 58 #include "lwip/snmp_msg.h"
mbed_official 0:51ac1d130fd4 59 #include "lwip/dns.h"
mbed_official 0:51ac1d130fd4 60 #include "netif/ppp_oe.h"
mbed_official 0:51ac1d130fd4 61
mbed_official 0:51ac1d130fd4 62 #include <string.h>
mbed_official 0:51ac1d130fd4 63
mbed_official 0:51ac1d130fd4 64 #if !MEMP_MEM_MALLOC /* don't build if not configured for use in lwipopts.h */
mbed_official 0:51ac1d130fd4 65
mbed_official 0:51ac1d130fd4 66 struct memp {
mbed_official 0:51ac1d130fd4 67 struct memp *next;
mbed_official 0:51ac1d130fd4 68 #if MEMP_OVERFLOW_CHECK
mbed_official 0:51ac1d130fd4 69 const char *file;
mbed_official 0:51ac1d130fd4 70 int line;
mbed_official 0:51ac1d130fd4 71 #endif /* MEMP_OVERFLOW_CHECK */
mbed_official 0:51ac1d130fd4 72 };
mbed_official 0:51ac1d130fd4 73
mbed_official 0:51ac1d130fd4 74 #if MEMP_OVERFLOW_CHECK
mbed_official 0:51ac1d130fd4 75 /* if MEMP_OVERFLOW_CHECK is turned on, we reserve some bytes at the beginning
mbed_official 0:51ac1d130fd4 76 * and at the end of each element, initialize them as 0xcd and check
mbed_official 0:51ac1d130fd4 77 * them later. */
mbed_official 0:51ac1d130fd4 78 /* If MEMP_OVERFLOW_CHECK is >= 2, on every call to memp_malloc or memp_free,
mbed_official 0:51ac1d130fd4 79 * every single element in each pool is checked!
mbed_official 0:51ac1d130fd4 80 * This is VERY SLOW but also very helpful. */
mbed_official 0:51ac1d130fd4 81 /* MEMP_SANITY_REGION_BEFORE and MEMP_SANITY_REGION_AFTER can be overridden in
mbed_official 0:51ac1d130fd4 82 * lwipopts.h to change the amount reserved for checking. */
mbed_official 0:51ac1d130fd4 83 #ifndef MEMP_SANITY_REGION_BEFORE
mbed_official 0:51ac1d130fd4 84 #define MEMP_SANITY_REGION_BEFORE 16
mbed_official 0:51ac1d130fd4 85 #endif /* MEMP_SANITY_REGION_BEFORE*/
mbed_official 0:51ac1d130fd4 86 #if MEMP_SANITY_REGION_BEFORE > 0
mbed_official 0:51ac1d130fd4 87 #define MEMP_SANITY_REGION_BEFORE_ALIGNED LWIP_MEM_ALIGN_SIZE(MEMP_SANITY_REGION_BEFORE)
mbed_official 0:51ac1d130fd4 88 #else
mbed_official 0:51ac1d130fd4 89 #define MEMP_SANITY_REGION_BEFORE_ALIGNED 0
mbed_official 0:51ac1d130fd4 90 #endif /* MEMP_SANITY_REGION_BEFORE*/
mbed_official 0:51ac1d130fd4 91 #ifndef MEMP_SANITY_REGION_AFTER
mbed_official 0:51ac1d130fd4 92 #define MEMP_SANITY_REGION_AFTER 16
mbed_official 0:51ac1d130fd4 93 #endif /* MEMP_SANITY_REGION_AFTER*/
mbed_official 0:51ac1d130fd4 94 #if MEMP_SANITY_REGION_AFTER > 0
mbed_official 0:51ac1d130fd4 95 #define MEMP_SANITY_REGION_AFTER_ALIGNED LWIP_MEM_ALIGN_SIZE(MEMP_SANITY_REGION_AFTER)
mbed_official 0:51ac1d130fd4 96 #else
mbed_official 0:51ac1d130fd4 97 #define MEMP_SANITY_REGION_AFTER_ALIGNED 0
mbed_official 0:51ac1d130fd4 98 #endif /* MEMP_SANITY_REGION_AFTER*/
mbed_official 0:51ac1d130fd4 99
mbed_official 0:51ac1d130fd4 100 /* MEMP_SIZE: save space for struct memp and for sanity check */
mbed_official 0:51ac1d130fd4 101 #define MEMP_SIZE (LWIP_MEM_ALIGN_SIZE(sizeof(struct memp)) + MEMP_SANITY_REGION_BEFORE_ALIGNED)
mbed_official 0:51ac1d130fd4 102 #define MEMP_ALIGN_SIZE(x) (LWIP_MEM_ALIGN_SIZE(x) + MEMP_SANITY_REGION_AFTER_ALIGNED)
mbed_official 0:51ac1d130fd4 103
mbed_official 0:51ac1d130fd4 104 #else /* MEMP_OVERFLOW_CHECK */
mbed_official 0:51ac1d130fd4 105
mbed_official 0:51ac1d130fd4 106 /* No sanity checks
mbed_official 0:51ac1d130fd4 107 * We don't need to preserve the struct memp while not allocated, so we
mbed_official 0:51ac1d130fd4 108 * can save a little space and set MEMP_SIZE to 0.
mbed_official 0:51ac1d130fd4 109 */
mbed_official 0:51ac1d130fd4 110 #define MEMP_SIZE 0
mbed_official 0:51ac1d130fd4 111 #define MEMP_ALIGN_SIZE(x) (LWIP_MEM_ALIGN_SIZE(x))
mbed_official 0:51ac1d130fd4 112
mbed_official 0:51ac1d130fd4 113 #endif /* MEMP_OVERFLOW_CHECK */
mbed_official 0:51ac1d130fd4 114
mbed_official 0:51ac1d130fd4 115 /** This array holds the first free element of each pool.
mbed_official 0:51ac1d130fd4 116 * Elements form a linked list. */
mbed_official 0:51ac1d130fd4 117 static struct memp *memp_tab[MEMP_MAX];
mbed_official 0:51ac1d130fd4 118
mbed_official 0:51ac1d130fd4 119 #else /* MEMP_MEM_MALLOC */
mbed_official 0:51ac1d130fd4 120
mbed_official 0:51ac1d130fd4 121 #define MEMP_ALIGN_SIZE(x) (LWIP_MEM_ALIGN_SIZE(x))
mbed_official 0:51ac1d130fd4 122
mbed_official 0:51ac1d130fd4 123 #endif /* MEMP_MEM_MALLOC */
mbed_official 0:51ac1d130fd4 124
mbed_official 0:51ac1d130fd4 125 /** This array holds the element sizes of each pool. */
mbed_official 0:51ac1d130fd4 126 #if !MEM_USE_POOLS && !MEMP_MEM_MALLOC
mbed_official 0:51ac1d130fd4 127 static
mbed_official 0:51ac1d130fd4 128 #endif
mbed_official 0:51ac1d130fd4 129 const u16_t memp_sizes[MEMP_MAX] = {
mbed_official 0:51ac1d130fd4 130 #define LWIP_MEMPOOL(name,num,size,desc) LWIP_MEM_ALIGN_SIZE(size),
mbed_official 0:51ac1d130fd4 131 #include "lwip/memp_std.h"
mbed_official 0:51ac1d130fd4 132 };
mbed_official 0:51ac1d130fd4 133
mbed_official 0:51ac1d130fd4 134 #if !MEMP_MEM_MALLOC /* don't build if not configured for use in lwipopts.h */
mbed_official 0:51ac1d130fd4 135
mbed_official 0:51ac1d130fd4 136 /** This array holds the number of elements in each pool. */
mbed_official 0:51ac1d130fd4 137 static const u16_t memp_num[MEMP_MAX] = {
mbed_official 0:51ac1d130fd4 138 #define LWIP_MEMPOOL(name,num,size,desc) (num),
mbed_official 0:51ac1d130fd4 139 #include "lwip/memp_std.h"
mbed_official 0:51ac1d130fd4 140 };
mbed_official 0:51ac1d130fd4 141
mbed_official 0:51ac1d130fd4 142 /** This array holds a textual description of each pool. */
mbed_official 0:51ac1d130fd4 143 #ifdef LWIP_DEBUG
mbed_official 0:51ac1d130fd4 144 static const char *memp_desc[MEMP_MAX] = {
mbed_official 0:51ac1d130fd4 145 #define LWIP_MEMPOOL(name,num,size,desc) (desc),
mbed_official 0:51ac1d130fd4 146 #include "lwip/memp_std.h"
mbed_official 0:51ac1d130fd4 147 };
mbed_official 0:51ac1d130fd4 148 #endif /* LWIP_DEBUG */
mbed_official 0:51ac1d130fd4 149
mbed_official 0:51ac1d130fd4 150 #if MEMP_SEPARATE_POOLS
mbed_official 0:51ac1d130fd4 151
mbed_official 0:51ac1d130fd4 152 /** This creates each memory pool. These are named memp_memory_XXX_base (where
mbed_official 0:51ac1d130fd4 153 * XXX is the name of the pool defined in memp_std.h).
mbed_official 0:51ac1d130fd4 154 * To relocate a pool, declare it as extern in cc.h. Example for GCC:
mbed_official 0:51ac1d130fd4 155 * extern u8_t __attribute__((section(".onchip_mem"))) memp_memory_UDP_PCB_base[];
mbed_official 0:51ac1d130fd4 156 */
mbed_official 0:51ac1d130fd4 157 #define LWIP_MEMPOOL(name,num,size,desc) u8_t memp_memory_ ## name ## _base \
mbed_official 0:51ac1d130fd4 158 [((num) * (MEMP_SIZE + MEMP_ALIGN_SIZE(size)))];
mbed_official 0:51ac1d130fd4 159 #include "lwip/memp_std.h"
mbed_official 0:51ac1d130fd4 160
mbed_official 0:51ac1d130fd4 161 /** This array holds the base of each memory pool. */
mbed_official 0:51ac1d130fd4 162 static u8_t *const memp_bases[] = {
mbed_official 0:51ac1d130fd4 163 #define LWIP_MEMPOOL(name,num,size,desc) memp_memory_ ## name ## _base,
mbed_official 0:51ac1d130fd4 164 #include "lwip/memp_std.h"
mbed_official 0:51ac1d130fd4 165 };
mbed_official 0:51ac1d130fd4 166
mbed_official 0:51ac1d130fd4 167 #else /* MEMP_SEPARATE_POOLS */
mbed_official 0:51ac1d130fd4 168
mbed_official 0:51ac1d130fd4 169 /** This is the actual memory used by the pools (all pools in one big block). */
mbed_official 0:51ac1d130fd4 170 static u8_t memp_memory[MEM_ALIGNMENT - 1
mbed_official 0:51ac1d130fd4 171 #define LWIP_MEMPOOL(name,num,size,desc) + ( (num) * (MEMP_SIZE + MEMP_ALIGN_SIZE(size) ) )
mbed_official 0:51ac1d130fd4 172 #include "lwip/memp_std.h"
mbed_official 0:51ac1d130fd4 173 ];
mbed_official 0:51ac1d130fd4 174
mbed_official 0:51ac1d130fd4 175 #endif /* MEMP_SEPARATE_POOLS */
mbed_official 0:51ac1d130fd4 176
mbed_official 0:51ac1d130fd4 177 #if MEMP_SANITY_CHECK
mbed_official 0:51ac1d130fd4 178 /**
mbed_official 0:51ac1d130fd4 179 * Check that memp-lists don't form a circle
mbed_official 0:51ac1d130fd4 180 */
mbed_official 0:51ac1d130fd4 181 static int
mbed_official 0:51ac1d130fd4 182 memp_sanity(void)
mbed_official 0:51ac1d130fd4 183 {
mbed_official 0:51ac1d130fd4 184 s16_t i, c;
mbed_official 0:51ac1d130fd4 185 struct memp *m, *n;
mbed_official 0:51ac1d130fd4 186
mbed_official 0:51ac1d130fd4 187 for (i = 0; i < MEMP_MAX; i++) {
mbed_official 0:51ac1d130fd4 188 for (m = memp_tab[i]; m != NULL; m = m->next) {
mbed_official 0:51ac1d130fd4 189 c = 1;
mbed_official 0:51ac1d130fd4 190 for (n = memp_tab[i]; n != NULL; n = n->next) {
mbed_official 0:51ac1d130fd4 191 if (n == m && --c < 0) {
mbed_official 0:51ac1d130fd4 192 return 0;
mbed_official 0:51ac1d130fd4 193 }
mbed_official 0:51ac1d130fd4 194 }
mbed_official 0:51ac1d130fd4 195 }
mbed_official 0:51ac1d130fd4 196 }
mbed_official 0:51ac1d130fd4 197 return 1;
mbed_official 0:51ac1d130fd4 198 }
mbed_official 0:51ac1d130fd4 199 #endif /* MEMP_SANITY_CHECK*/
mbed_official 0:51ac1d130fd4 200 #if MEMP_OVERFLOW_CHECK
mbed_official 0:51ac1d130fd4 201 #if defined(LWIP_DEBUG) && MEMP_STATS
mbed_official 0:51ac1d130fd4 202 static const char * memp_overflow_names[] = {
mbed_official 0:51ac1d130fd4 203 #define LWIP_MEMPOOL(name,num,size,desc) "/"desc,
mbed_official 0:51ac1d130fd4 204 #include "lwip/memp_std.h"
mbed_official 0:51ac1d130fd4 205 };
mbed_official 0:51ac1d130fd4 206 #endif
mbed_official 0:51ac1d130fd4 207
mbed_official 0:51ac1d130fd4 208 /**
mbed_official 0:51ac1d130fd4 209 * Check if a memp element was victim of an overflow
mbed_official 0:51ac1d130fd4 210 * (e.g. the restricted area after it has been altered)
mbed_official 0:51ac1d130fd4 211 *
mbed_official 0:51ac1d130fd4 212 * @param p the memp element to check
mbed_official 0:51ac1d130fd4 213 * @param memp_type the pool p comes from
mbed_official 0:51ac1d130fd4 214 */
mbed_official 0:51ac1d130fd4 215 static void
mbed_official 0:51ac1d130fd4 216 memp_overflow_check_element_overflow(struct memp *p, u16_t memp_type)
mbed_official 0:51ac1d130fd4 217 {
mbed_official 0:51ac1d130fd4 218 u16_t k;
mbed_official 0:51ac1d130fd4 219 u8_t *m;
mbed_official 0:51ac1d130fd4 220 #if MEMP_SANITY_REGION_AFTER_ALIGNED > 0
mbed_official 0:51ac1d130fd4 221 m = (u8_t*)p + MEMP_SIZE + memp_sizes[memp_type];
mbed_official 0:51ac1d130fd4 222 for (k = 0; k < MEMP_SANITY_REGION_AFTER_ALIGNED; k++) {
mbed_official 0:51ac1d130fd4 223 if (m[k] != 0xcd) {
mbed_official 0:51ac1d130fd4 224 char errstr[128] = "detected memp overflow in pool ";
mbed_official 0:51ac1d130fd4 225 char digit[] = "0";
mbed_official 0:51ac1d130fd4 226 if(memp_type >= 10) {
mbed_official 0:51ac1d130fd4 227 digit[0] = '0' + (memp_type/10);
mbed_official 0:51ac1d130fd4 228 strcat(errstr, digit);
mbed_official 0:51ac1d130fd4 229 }
mbed_official 0:51ac1d130fd4 230 digit[0] = '0' + (memp_type%10);
mbed_official 0:51ac1d130fd4 231 strcat(errstr, digit);
mbed_official 0:51ac1d130fd4 232 #if defined(LWIP_DEBUG) && MEMP_STATS
mbed_official 0:51ac1d130fd4 233 strcat(errstr, memp_overflow_names[memp_type]);
mbed_official 0:51ac1d130fd4 234 #endif
mbed_official 0:51ac1d130fd4 235 LWIP_ASSERT(errstr, 0);
mbed_official 0:51ac1d130fd4 236 }
mbed_official 0:51ac1d130fd4 237 }
mbed_official 0:51ac1d130fd4 238 #endif
mbed_official 0:51ac1d130fd4 239 }
mbed_official 0:51ac1d130fd4 240
mbed_official 0:51ac1d130fd4 241 /**
mbed_official 0:51ac1d130fd4 242 * Check if a memp element was victim of an underflow
mbed_official 0:51ac1d130fd4 243 * (e.g. the restricted area before it has been altered)
mbed_official 0:51ac1d130fd4 244 *
mbed_official 0:51ac1d130fd4 245 * @param p the memp element to check
mbed_official 0:51ac1d130fd4 246 * @param memp_type the pool p comes from
mbed_official 0:51ac1d130fd4 247 */
mbed_official 0:51ac1d130fd4 248 static void
mbed_official 0:51ac1d130fd4 249 memp_overflow_check_element_underflow(struct memp *p, u16_t memp_type)
mbed_official 0:51ac1d130fd4 250 {
mbed_official 0:51ac1d130fd4 251 u16_t k;
mbed_official 0:51ac1d130fd4 252 u8_t *m;
mbed_official 0:51ac1d130fd4 253 #if MEMP_SANITY_REGION_BEFORE_ALIGNED > 0
mbed_official 0:51ac1d130fd4 254 m = (u8_t*)p + MEMP_SIZE - MEMP_SANITY_REGION_BEFORE_ALIGNED;
mbed_official 0:51ac1d130fd4 255 for (k = 0; k < MEMP_SANITY_REGION_BEFORE_ALIGNED; k++) {
mbed_official 0:51ac1d130fd4 256 if (m[k] != 0xcd) {
mbed_official 0:51ac1d130fd4 257 char errstr[128] = "detected memp underflow in pool ";
mbed_official 0:51ac1d130fd4 258 char digit[] = "0";
mbed_official 0:51ac1d130fd4 259 if(memp_type >= 10) {
mbed_official 0:51ac1d130fd4 260 digit[0] = '0' + (memp_type/10);
mbed_official 0:51ac1d130fd4 261 strcat(errstr, digit);
mbed_official 0:51ac1d130fd4 262 }
mbed_official 0:51ac1d130fd4 263 digit[0] = '0' + (memp_type%10);
mbed_official 0:51ac1d130fd4 264 strcat(errstr, digit);
mbed_official 0:51ac1d130fd4 265 #if defined(LWIP_DEBUG) && MEMP_STATS
mbed_official 0:51ac1d130fd4 266 strcat(errstr, memp_overflow_names[memp_type]);
mbed_official 0:51ac1d130fd4 267 #endif
mbed_official 0:51ac1d130fd4 268 LWIP_ASSERT(errstr, 0);
mbed_official 0:51ac1d130fd4 269 }
mbed_official 0:51ac1d130fd4 270 }
mbed_official 0:51ac1d130fd4 271 #endif
mbed_official 0:51ac1d130fd4 272 }
mbed_official 0:51ac1d130fd4 273
mbed_official 0:51ac1d130fd4 274 /**
mbed_official 0:51ac1d130fd4 275 * Do an overflow check for all elements in every pool.
mbed_official 0:51ac1d130fd4 276 *
mbed_official 0:51ac1d130fd4 277 * @see memp_overflow_check_element for a description of the check
mbed_official 0:51ac1d130fd4 278 */
mbed_official 0:51ac1d130fd4 279 static void
mbed_official 0:51ac1d130fd4 280 memp_overflow_check_all(void)
mbed_official 0:51ac1d130fd4 281 {
mbed_official 0:51ac1d130fd4 282 u16_t i, j;
mbed_official 0:51ac1d130fd4 283 struct memp *p;
mbed_official 0:51ac1d130fd4 284
mbed_official 0:51ac1d130fd4 285 p = (struct memp *)LWIP_MEM_ALIGN(memp_memory);
mbed_official 0:51ac1d130fd4 286 for (i = 0; i < MEMP_MAX; ++i) {
mbed_official 0:51ac1d130fd4 287 p = p;
mbed_official 0:51ac1d130fd4 288 for (j = 0; j < memp_num[i]; ++j) {
mbed_official 0:51ac1d130fd4 289 memp_overflow_check_element_overflow(p, i);
mbed_official 0:51ac1d130fd4 290 p = (struct memp*)((u8_t*)p + MEMP_SIZE + memp_sizes[i] + MEMP_SANITY_REGION_AFTER_ALIGNED);
mbed_official 0:51ac1d130fd4 291 }
mbed_official 0:51ac1d130fd4 292 }
mbed_official 0:51ac1d130fd4 293 p = (struct memp *)LWIP_MEM_ALIGN(memp_memory);
mbed_official 0:51ac1d130fd4 294 for (i = 0; i < MEMP_MAX; ++i) {
mbed_official 0:51ac1d130fd4 295 p = p;
mbed_official 0:51ac1d130fd4 296 for (j = 0; j < memp_num[i]; ++j) {
mbed_official 0:51ac1d130fd4 297 memp_overflow_check_element_underflow(p, i);
mbed_official 0:51ac1d130fd4 298 p = (struct memp*)((u8_t*)p + MEMP_SIZE + memp_sizes[i] + MEMP_SANITY_REGION_AFTER_ALIGNED);
mbed_official 0:51ac1d130fd4 299 }
mbed_official 0:51ac1d130fd4 300 }
mbed_official 0:51ac1d130fd4 301 }
mbed_official 0:51ac1d130fd4 302
mbed_official 0:51ac1d130fd4 303 /**
mbed_official 0:51ac1d130fd4 304 * Initialize the restricted areas of all memp elements in every pool.
mbed_official 0:51ac1d130fd4 305 */
mbed_official 0:51ac1d130fd4 306 static void
mbed_official 0:51ac1d130fd4 307 memp_overflow_init(void)
mbed_official 0:51ac1d130fd4 308 {
mbed_official 0:51ac1d130fd4 309 u16_t i, j;
mbed_official 0:51ac1d130fd4 310 struct memp *p;
mbed_official 0:51ac1d130fd4 311 u8_t *m;
mbed_official 0:51ac1d130fd4 312
mbed_official 0:51ac1d130fd4 313 p = (struct memp *)LWIP_MEM_ALIGN(memp_memory);
mbed_official 0:51ac1d130fd4 314 for (i = 0; i < MEMP_MAX; ++i) {
mbed_official 0:51ac1d130fd4 315 p = p;
mbed_official 0:51ac1d130fd4 316 for (j = 0; j < memp_num[i]; ++j) {
mbed_official 0:51ac1d130fd4 317 #if MEMP_SANITY_REGION_BEFORE_ALIGNED > 0
mbed_official 0:51ac1d130fd4 318 m = (u8_t*)p + MEMP_SIZE - MEMP_SANITY_REGION_BEFORE_ALIGNED;
mbed_official 0:51ac1d130fd4 319 memset(m, 0xcd, MEMP_SANITY_REGION_BEFORE_ALIGNED);
mbed_official 0:51ac1d130fd4 320 #endif
mbed_official 0:51ac1d130fd4 321 #if MEMP_SANITY_REGION_AFTER_ALIGNED > 0
mbed_official 0:51ac1d130fd4 322 m = (u8_t*)p + MEMP_SIZE + memp_sizes[i];
mbed_official 0:51ac1d130fd4 323 memset(m, 0xcd, MEMP_SANITY_REGION_AFTER_ALIGNED);
mbed_official 0:51ac1d130fd4 324 #endif
mbed_official 0:51ac1d130fd4 325 p = (struct memp*)((u8_t*)p + MEMP_SIZE + memp_sizes[i] + MEMP_SANITY_REGION_AFTER_ALIGNED);
mbed_official 0:51ac1d130fd4 326 }
mbed_official 0:51ac1d130fd4 327 }
mbed_official 0:51ac1d130fd4 328 }
mbed_official 0:51ac1d130fd4 329 #endif /* MEMP_OVERFLOW_CHECK */
mbed_official 0:51ac1d130fd4 330
mbed_official 0:51ac1d130fd4 331 /**
mbed_official 0:51ac1d130fd4 332 * Initialize this module.
mbed_official 0:51ac1d130fd4 333 *
mbed_official 0:51ac1d130fd4 334 * Carves out memp_memory into linked lists for each pool-type.
mbed_official 0:51ac1d130fd4 335 */
mbed_official 0:51ac1d130fd4 336 void
mbed_official 0:51ac1d130fd4 337 memp_init(void)
mbed_official 0:51ac1d130fd4 338 {
mbed_official 0:51ac1d130fd4 339 struct memp *memp;
mbed_official 0:51ac1d130fd4 340 u16_t i, j;
mbed_official 0:51ac1d130fd4 341
mbed_official 0:51ac1d130fd4 342 for (i = 0; i < MEMP_MAX; ++i) {
mbed_official 0:51ac1d130fd4 343 MEMP_STATS_AVAIL(used, i, 0);
mbed_official 0:51ac1d130fd4 344 MEMP_STATS_AVAIL(max, i, 0);
mbed_official 0:51ac1d130fd4 345 MEMP_STATS_AVAIL(err, i, 0);
mbed_official 0:51ac1d130fd4 346 MEMP_STATS_AVAIL(avail, i, memp_num[i]);
mbed_official 0:51ac1d130fd4 347 }
mbed_official 0:51ac1d130fd4 348
mbed_official 0:51ac1d130fd4 349 #if !MEMP_SEPARATE_POOLS
mbed_official 0:51ac1d130fd4 350 memp = (struct memp *)LWIP_MEM_ALIGN(memp_memory);
mbed_official 0:51ac1d130fd4 351 #endif /* !MEMP_SEPARATE_POOLS */
mbed_official 0:51ac1d130fd4 352 /* for every pool: */
mbed_official 0:51ac1d130fd4 353 for (i = 0; i < MEMP_MAX; ++i) {
mbed_official 0:51ac1d130fd4 354 memp_tab[i] = NULL;
mbed_official 0:51ac1d130fd4 355 #if MEMP_SEPARATE_POOLS
mbed_official 0:51ac1d130fd4 356 memp = (struct memp*)memp_bases[i];
mbed_official 0:51ac1d130fd4 357 #endif /* MEMP_SEPARATE_POOLS */
mbed_official 0:51ac1d130fd4 358 /* create a linked list of memp elements */
mbed_official 0:51ac1d130fd4 359 for (j = 0; j < memp_num[i]; ++j) {
mbed_official 0:51ac1d130fd4 360 memp->next = memp_tab[i];
mbed_official 0:51ac1d130fd4 361 memp_tab[i] = memp;
mbed_official 0:51ac1d130fd4 362 memp = (struct memp *)(void *)((u8_t *)memp + MEMP_SIZE + memp_sizes[i]
mbed_official 0:51ac1d130fd4 363 #if MEMP_OVERFLOW_CHECK
mbed_official 0:51ac1d130fd4 364 + MEMP_SANITY_REGION_AFTER_ALIGNED
mbed_official 0:51ac1d130fd4 365 #endif
mbed_official 0:51ac1d130fd4 366 );
mbed_official 0:51ac1d130fd4 367 }
mbed_official 0:51ac1d130fd4 368 }
mbed_official 0:51ac1d130fd4 369 #if MEMP_OVERFLOW_CHECK
mbed_official 0:51ac1d130fd4 370 memp_overflow_init();
mbed_official 0:51ac1d130fd4 371 /* check everything a first time to see if it worked */
mbed_official 0:51ac1d130fd4 372 memp_overflow_check_all();
mbed_official 0:51ac1d130fd4 373 #endif /* MEMP_OVERFLOW_CHECK */
mbed_official 0:51ac1d130fd4 374 }
mbed_official 0:51ac1d130fd4 375
mbed_official 0:51ac1d130fd4 376 /**
mbed_official 0:51ac1d130fd4 377 * Get an element from a specific pool.
mbed_official 0:51ac1d130fd4 378 *
mbed_official 0:51ac1d130fd4 379 * @param type the pool to get an element from
mbed_official 0:51ac1d130fd4 380 *
mbed_official 0:51ac1d130fd4 381 * the debug version has two more parameters:
mbed_official 0:51ac1d130fd4 382 * @param file file name calling this function
mbed_official 0:51ac1d130fd4 383 * @param line number of line where this function is called
mbed_official 0:51ac1d130fd4 384 *
mbed_official 0:51ac1d130fd4 385 * @return a pointer to the allocated memory or a NULL pointer on error
mbed_official 0:51ac1d130fd4 386 */
mbed_official 0:51ac1d130fd4 387 void *
mbed_official 0:51ac1d130fd4 388 #if !MEMP_OVERFLOW_CHECK
mbed_official 0:51ac1d130fd4 389 memp_malloc(memp_t type)
mbed_official 0:51ac1d130fd4 390 #else
mbed_official 0:51ac1d130fd4 391 memp_malloc_fn(memp_t type, const char* file, const int line)
mbed_official 0:51ac1d130fd4 392 #endif
mbed_official 0:51ac1d130fd4 393 {
mbed_official 0:51ac1d130fd4 394 struct memp *memp;
mbed_official 0:51ac1d130fd4 395 SYS_ARCH_DECL_PROTECT(old_level);
mbed_official 0:51ac1d130fd4 396
mbed_official 0:51ac1d130fd4 397 LWIP_ERROR("memp_malloc: type < MEMP_MAX", (type < MEMP_MAX), return NULL;);
mbed_official 0:51ac1d130fd4 398
mbed_official 0:51ac1d130fd4 399 SYS_ARCH_PROTECT(old_level);
mbed_official 0:51ac1d130fd4 400 #if MEMP_OVERFLOW_CHECK >= 2
mbed_official 0:51ac1d130fd4 401 memp_overflow_check_all();
mbed_official 0:51ac1d130fd4 402 #endif /* MEMP_OVERFLOW_CHECK >= 2 */
mbed_official 0:51ac1d130fd4 403
mbed_official 0:51ac1d130fd4 404 memp = memp_tab[type];
mbed_official 0:51ac1d130fd4 405
mbed_official 0:51ac1d130fd4 406 if (memp != NULL) {
mbed_official 0:51ac1d130fd4 407 memp_tab[type] = memp->next;
mbed_official 0:51ac1d130fd4 408 #if MEMP_OVERFLOW_CHECK
mbed_official 0:51ac1d130fd4 409 memp->next = NULL;
mbed_official 0:51ac1d130fd4 410 memp->file = file;
mbed_official 0:51ac1d130fd4 411 memp->line = line;
mbed_official 0:51ac1d130fd4 412 #endif /* MEMP_OVERFLOW_CHECK */
mbed_official 0:51ac1d130fd4 413 MEMP_STATS_INC_USED(used, type);
mbed_official 0:51ac1d130fd4 414 LWIP_ASSERT("memp_malloc: memp properly aligned",
mbed_official 0:51ac1d130fd4 415 ((mem_ptr_t)memp % MEM_ALIGNMENT) == 0);
mbed_official 0:51ac1d130fd4 416 memp = (struct memp*)(void *)((u8_t*)memp + MEMP_SIZE);
mbed_official 0:51ac1d130fd4 417 } else {
mbed_official 0:51ac1d130fd4 418 LWIP_DEBUGF(MEMP_DEBUG | LWIP_DBG_LEVEL_SERIOUS, ("memp_malloc: out of memory in pool %s\n", memp_desc[type]));
mbed_official 0:51ac1d130fd4 419 MEMP_STATS_INC(err, type);
mbed_official 0:51ac1d130fd4 420 }
mbed_official 0:51ac1d130fd4 421
mbed_official 0:51ac1d130fd4 422 SYS_ARCH_UNPROTECT(old_level);
mbed_official 0:51ac1d130fd4 423
mbed_official 0:51ac1d130fd4 424 return memp;
mbed_official 0:51ac1d130fd4 425 }
mbed_official 0:51ac1d130fd4 426
mbed_official 0:51ac1d130fd4 427 /**
mbed_official 0:51ac1d130fd4 428 * Put an element back into its pool.
mbed_official 0:51ac1d130fd4 429 *
mbed_official 0:51ac1d130fd4 430 * @param type the pool where to put mem
mbed_official 0:51ac1d130fd4 431 * @param mem the memp element to free
mbed_official 0:51ac1d130fd4 432 */
mbed_official 0:51ac1d130fd4 433 void
mbed_official 0:51ac1d130fd4 434 memp_free(memp_t type, void *mem)
mbed_official 0:51ac1d130fd4 435 {
mbed_official 0:51ac1d130fd4 436 struct memp *memp;
mbed_official 0:51ac1d130fd4 437 SYS_ARCH_DECL_PROTECT(old_level);
mbed_official 0:51ac1d130fd4 438
mbed_official 0:51ac1d130fd4 439 if (mem == NULL) {
mbed_official 0:51ac1d130fd4 440 return;
mbed_official 0:51ac1d130fd4 441 }
mbed_official 0:51ac1d130fd4 442 LWIP_ASSERT("memp_free: mem properly aligned",
mbed_official 0:51ac1d130fd4 443 ((mem_ptr_t)mem % MEM_ALIGNMENT) == 0);
mbed_official 0:51ac1d130fd4 444
mbed_official 0:51ac1d130fd4 445 memp = (struct memp *)(void *)((u8_t*)mem - MEMP_SIZE);
mbed_official 0:51ac1d130fd4 446
mbed_official 0:51ac1d130fd4 447 SYS_ARCH_PROTECT(old_level);
mbed_official 0:51ac1d130fd4 448 #if MEMP_OVERFLOW_CHECK
mbed_official 0:51ac1d130fd4 449 #if MEMP_OVERFLOW_CHECK >= 2
mbed_official 0:51ac1d130fd4 450 memp_overflow_check_all();
mbed_official 0:51ac1d130fd4 451 #else
mbed_official 0:51ac1d130fd4 452 memp_overflow_check_element_overflow(memp, type);
mbed_official 0:51ac1d130fd4 453 memp_overflow_check_element_underflow(memp, type);
mbed_official 0:51ac1d130fd4 454 #endif /* MEMP_OVERFLOW_CHECK >= 2 */
mbed_official 0:51ac1d130fd4 455 #endif /* MEMP_OVERFLOW_CHECK */
mbed_official 0:51ac1d130fd4 456
mbed_official 0:51ac1d130fd4 457 MEMP_STATS_DEC(used, type);
mbed_official 0:51ac1d130fd4 458
mbed_official 0:51ac1d130fd4 459 memp->next = memp_tab[type];
mbed_official 0:51ac1d130fd4 460 memp_tab[type] = memp;
mbed_official 0:51ac1d130fd4 461
mbed_official 0:51ac1d130fd4 462 #if MEMP_SANITY_CHECK
mbed_official 0:51ac1d130fd4 463 LWIP_ASSERT("memp sanity", memp_sanity());
mbed_official 0:51ac1d130fd4 464 #endif /* MEMP_SANITY_CHECK */
mbed_official 0:51ac1d130fd4 465
mbed_official 0:51ac1d130fd4 466 SYS_ARCH_UNPROTECT(old_level);
mbed_official 0:51ac1d130fd4 467 }
mbed_official 0:51ac1d130fd4 468
mbed_official 0:51ac1d130fd4 469 #endif /* MEMP_MEM_MALLOC */