Travis Geiselbrecht | 1d0df69 | 2008-09-01 02:26:09 -0700 | [diff] [blame^] | 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 | |
| 33 | #include "lwip/opt.h" |
| 34 | |
| 35 | #include "lwip/memp.h" |
| 36 | |
| 37 | #include "lwip/pbuf.h" |
| 38 | #include "lwip/udp.h" |
| 39 | #include "lwip/raw.h" |
| 40 | #include "lwip/tcp.h" |
| 41 | #include "lwip/api.h" |
| 42 | #include "lwip/api_msg.h" |
| 43 | #include "lwip/tcpip.h" |
| 44 | |
| 45 | #include "lwip/sys.h" |
| 46 | #include "lwip/stats.h" |
| 47 | |
| 48 | struct memp { |
| 49 | struct memp *next; |
| 50 | }; |
| 51 | |
| 52 | |
| 53 | |
| 54 | static struct memp *memp_tab[MEMP_MAX]; |
| 55 | |
| 56 | static const u16_t memp_sizes[MEMP_MAX] = { |
| 57 | sizeof(struct pbuf), |
| 58 | sizeof(struct raw_pcb), |
| 59 | sizeof(struct udp_pcb), |
| 60 | sizeof(struct tcp_pcb), |
| 61 | sizeof(struct tcp_pcb_listen), |
| 62 | sizeof(struct tcp_seg), |
| 63 | sizeof(struct netbuf), |
| 64 | sizeof(struct netconn), |
| 65 | sizeof(struct api_msg), |
| 66 | sizeof(struct tcpip_msg), |
| 67 | sizeof(struct sys_timeout) |
| 68 | }; |
| 69 | |
| 70 | static const u16_t memp_num[MEMP_MAX] = { |
| 71 | MEMP_NUM_PBUF, |
| 72 | MEMP_NUM_RAW_PCB, |
| 73 | MEMP_NUM_UDP_PCB, |
| 74 | MEMP_NUM_TCP_PCB, |
| 75 | MEMP_NUM_TCP_PCB_LISTEN, |
| 76 | MEMP_NUM_TCP_SEG, |
| 77 | MEMP_NUM_NETBUF, |
| 78 | MEMP_NUM_NETCONN, |
| 79 | MEMP_NUM_API_MSG, |
| 80 | MEMP_NUM_TCPIP_MSG, |
| 81 | MEMP_NUM_SYS_TIMEOUT |
| 82 | }; |
| 83 | |
| 84 | static u8_t memp_memory[(MEMP_NUM_PBUF * |
| 85 | MEM_ALIGN_SIZE(sizeof(struct pbuf) + |
| 86 | sizeof(struct memp)) + |
| 87 | MEMP_NUM_RAW_PCB * |
| 88 | MEM_ALIGN_SIZE(sizeof(struct raw_pcb) + |
| 89 | sizeof(struct memp)) + |
| 90 | MEMP_NUM_UDP_PCB * |
| 91 | MEM_ALIGN_SIZE(sizeof(struct udp_pcb) + |
| 92 | sizeof(struct memp)) + |
| 93 | MEMP_NUM_TCP_PCB * |
| 94 | MEM_ALIGN_SIZE(sizeof(struct tcp_pcb) + |
| 95 | sizeof(struct memp)) + |
| 96 | MEMP_NUM_TCP_PCB_LISTEN * |
| 97 | MEM_ALIGN_SIZE(sizeof(struct tcp_pcb_listen) + |
| 98 | sizeof(struct memp)) + |
| 99 | MEMP_NUM_TCP_SEG * |
| 100 | MEM_ALIGN_SIZE(sizeof(struct tcp_seg) + |
| 101 | sizeof(struct memp)) + |
| 102 | MEMP_NUM_NETBUF * |
| 103 | MEM_ALIGN_SIZE(sizeof(struct netbuf) + |
| 104 | sizeof(struct memp)) + |
| 105 | MEMP_NUM_NETCONN * |
| 106 | MEM_ALIGN_SIZE(sizeof(struct netconn) + |
| 107 | sizeof(struct memp)) + |
| 108 | MEMP_NUM_API_MSG * |
| 109 | MEM_ALIGN_SIZE(sizeof(struct api_msg) + |
| 110 | sizeof(struct memp)) + |
| 111 | MEMP_NUM_TCPIP_MSG * |
| 112 | MEM_ALIGN_SIZE(sizeof(struct tcpip_msg) + |
| 113 | sizeof(struct memp)) + |
| 114 | MEMP_NUM_SYS_TIMEOUT * |
| 115 | MEM_ALIGN_SIZE(sizeof(struct sys_timeout) + |
| 116 | sizeof(struct memp)))]; |
| 117 | |
| 118 | |
| 119 | #if !SYS_LIGHTWEIGHT_PROT |
| 120 | static sys_sem_t mutex; |
| 121 | #endif |
| 122 | |
| 123 | #if MEMP_SANITY_CHECK |
| 124 | static int |
| 125 | memp_sanity(void) |
| 126 | { |
| 127 | s16_t i, c; |
| 128 | struct memp *m, *n; |
| 129 | |
| 130 | for(i = 0; i < MEMP_MAX; i++) { |
| 131 | for(m = memp_tab[i]; m != NULL; m = m->next) { |
| 132 | c = 1; |
| 133 | for(n = memp_tab[i]; n != NULL; n = n->next) { |
| 134 | if (n == m) { |
| 135 | --c; |
| 136 | } |
| 137 | if (c < 0) return 0; /* LW was: abort(); */ |
| 138 | } |
| 139 | } |
| 140 | } |
| 141 | return 1; |
| 142 | } |
| 143 | #endif /* MEMP_SANITY_CHECK*/ |
| 144 | |
| 145 | void |
| 146 | memp_init(void) |
| 147 | { |
| 148 | struct memp *m, *memp; |
| 149 | u16_t i, j; |
| 150 | u16_t size; |
| 151 | |
| 152 | #if MEMP_STATS |
| 153 | for(i = 0; i < MEMP_MAX; ++i) { |
| 154 | lwip_stats.memp[i].used = lwip_stats.memp[i].max = |
| 155 | lwip_stats.memp[i].err = 0; |
| 156 | lwip_stats.memp[i].avail = memp_num[i]; |
| 157 | } |
| 158 | #endif /* MEMP_STATS */ |
| 159 | |
| 160 | memp = (struct memp *)&memp_memory[0]; |
| 161 | for(i = 0; i < MEMP_MAX; ++i) { |
| 162 | size = MEM_ALIGN_SIZE(memp_sizes[i] + sizeof(struct memp)); |
| 163 | if (memp_num[i] > 0) { |
| 164 | memp_tab[i] = memp; |
| 165 | m = memp; |
| 166 | |
| 167 | for(j = 0; j < memp_num[i]; ++j) { |
| 168 | m->next = (struct memp *)MEM_ALIGN((u8_t *)m + size); |
| 169 | memp = m; |
| 170 | m = m->next; |
| 171 | } |
| 172 | memp->next = NULL; |
| 173 | memp = m; |
| 174 | } else { |
| 175 | memp_tab[i] = NULL; |
| 176 | } |
| 177 | } |
| 178 | |
| 179 | #if !SYS_LIGHTWEIGHT_PROT |
| 180 | mutex = sys_sem_new(1); |
| 181 | #endif |
| 182 | |
| 183 | |
| 184 | } |
| 185 | |
| 186 | void * |
| 187 | memp_malloc(memp_t type) |
| 188 | { |
| 189 | struct memp *memp; |
| 190 | void *mem; |
| 191 | #if SYS_LIGHTWEIGHT_PROT |
| 192 | SYS_ARCH_DECL_PROTECT(old_level); |
| 193 | #endif |
| 194 | |
| 195 | LWIP_ASSERT("memp_malloc: type < MEMP_MAX", type < MEMP_MAX); |
| 196 | |
| 197 | #if SYS_LIGHTWEIGHT_PROT |
| 198 | SYS_ARCH_PROTECT(old_level); |
| 199 | #else /* SYS_LIGHTWEIGHT_PROT */ |
| 200 | sys_sem_wait(mutex); |
| 201 | #endif /* SYS_LIGHTWEIGHT_PROT */ |
| 202 | |
| 203 | memp = memp_tab[type]; |
| 204 | |
| 205 | if (memp != NULL) { |
| 206 | memp_tab[type] = memp->next; |
| 207 | memp->next = NULL; |
| 208 | #if MEMP_STATS |
| 209 | ++lwip_stats.memp[type].used; |
| 210 | if (lwip_stats.memp[type].used > lwip_stats.memp[type].max) { |
| 211 | lwip_stats.memp[type].max = lwip_stats.memp[type].used; |
| 212 | } |
| 213 | #endif /* MEMP_STATS */ |
| 214 | #if SYS_LIGHTWEIGHT_PROT |
| 215 | SYS_ARCH_UNPROTECT(old_level); |
| 216 | #else /* SYS_LIGHTWEIGHT_PROT */ |
| 217 | sys_sem_signal(mutex); |
| 218 | #endif /* SYS_LIGHTWEIGHT_PROT */ |
| 219 | LWIP_ASSERT("memp_malloc: memp properly aligned", |
| 220 | ((mem_ptr_t)MEM_ALIGN((u8_t *)memp + sizeof(struct memp)) % MEM_ALIGNMENT) == 0); |
| 221 | |
| 222 | mem = MEM_ALIGN((u8_t *)memp + sizeof(struct memp)); |
| 223 | return mem; |
| 224 | } else { |
| 225 | LWIP_DEBUGF(MEMP_DEBUG | 2, ("memp_malloc: out of memory in pool %"S16_F"\n", type)); |
| 226 | #if MEMP_STATS |
| 227 | ++lwip_stats.memp[type].err; |
| 228 | #endif /* MEMP_STATS */ |
| 229 | #if SYS_LIGHTWEIGHT_PROT |
| 230 | SYS_ARCH_UNPROTECT(old_level); |
| 231 | #else /* SYS_LIGHTWEIGHT_PROT */ |
| 232 | sys_sem_signal(mutex); |
| 233 | #endif /* SYS_LIGHTWEIGHT_PROT */ |
| 234 | return NULL; |
| 235 | } |
| 236 | } |
| 237 | |
| 238 | void |
| 239 | memp_free(memp_t type, void *mem) |
| 240 | { |
| 241 | struct memp *memp; |
| 242 | #if SYS_LIGHTWEIGHT_PROT |
| 243 | SYS_ARCH_DECL_PROTECT(old_level); |
| 244 | #endif /* SYS_LIGHTWEIGHT_PROT */ |
| 245 | |
| 246 | if (mem == NULL) { |
| 247 | return; |
| 248 | } |
| 249 | memp = (struct memp *)((u8_t *)mem - sizeof(struct memp)); |
| 250 | |
| 251 | #if SYS_LIGHTWEIGHT_PROT |
| 252 | SYS_ARCH_PROTECT(old_level); |
| 253 | #else /* SYS_LIGHTWEIGHT_PROT */ |
| 254 | sys_sem_wait(mutex); |
| 255 | #endif /* SYS_LIGHTWEIGHT_PROT */ |
| 256 | |
| 257 | #if MEMP_STATS |
| 258 | lwip_stats.memp[type].used--; |
| 259 | #endif /* MEMP_STATS */ |
| 260 | |
| 261 | memp->next = memp_tab[type]; |
| 262 | memp_tab[type] = memp; |
| 263 | |
| 264 | #if MEMP_SANITY_CHECK |
| 265 | LWIP_ASSERT("memp sanity", memp_sanity()); |
| 266 | #endif |
| 267 | |
| 268 | #if SYS_LIGHTWEIGHT_PROT |
| 269 | SYS_ARCH_UNPROTECT(old_level); |
| 270 | #else /* SYS_LIGHTWEIGHT_PROT */ |
| 271 | sys_sem_signal(mutex); |
| 272 | #endif /* SYS_LIGHTWEIGHT_PROT */ |
| 273 | } |
| 274 | |