2 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
5 * Redistribution and use in source and binary forms, with or without modification,
6 * are permitted provided that the following conditions are met:
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.
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,
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21 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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27 * This file is part of the lwIP TCP/IP stack.
29 * Author: Adam Dunkels <adam@sics.se>
35 #include "lwip/memp.h"
37 #include "lwip/pbuf.h"
42 #include "lwip/api_msg.h"
43 #include "lwip/tcpip.h"
46 #include "lwip/stats.h"
54 static struct memp *memp_tab[MEMP_MAX];
56 static const u16_t memp_sizes[MEMP_MAX] = {
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)
70 static const u16_t memp_num[MEMP_MAX] = {
75 MEMP_NUM_TCP_PCB_LISTEN,
84 static u8_t memp_memory[(MEMP_NUM_PBUF *
85 MEM_ALIGN_SIZE(sizeof(struct pbuf) +
86 sizeof(struct memp)) +
88 MEM_ALIGN_SIZE(sizeof(struct raw_pcb) +
89 sizeof(struct memp)) +
91 MEM_ALIGN_SIZE(sizeof(struct udp_pcb) +
92 sizeof(struct memp)) +
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)) +
100 MEM_ALIGN_SIZE(sizeof(struct tcp_seg) +
101 sizeof(struct memp)) +
103 MEM_ALIGN_SIZE(sizeof(struct netbuf) +
104 sizeof(struct memp)) +
106 MEM_ALIGN_SIZE(sizeof(struct netconn) +
107 sizeof(struct memp)) +
109 MEM_ALIGN_SIZE(sizeof(struct api_msg) +
110 sizeof(struct memp)) +
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)))];
119 #if !SYS_LIGHTWEIGHT_PROT
120 static sys_sem_t mutex;
123 #if MEMP_SANITY_CHECK
130 for(i = 0; i < MEMP_MAX; i++) {
131 for(m = memp_tab[i]; m != NULL; m = m->next) {
133 for(n = memp_tab[i]; n != NULL; n = n->next) {
137 if (c < 0) return 0; /* LW was: abort(); */
143 #endif /* MEMP_SANITY_CHECK*/
148 struct memp *m, *memp;
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];
158 #endif /* MEMP_STATS */
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) {
167 for(j = 0; j < memp_num[i]; ++j) {
168 m->next = (struct memp *)MEM_ALIGN((u8_t *)m + size);
179 #if !SYS_LIGHTWEIGHT_PROT
180 mutex = sys_sem_new(1);
187 memp_malloc(memp_t type)
191 #if SYS_LIGHTWEIGHT_PROT
192 SYS_ARCH_DECL_PROTECT(old_level);
195 LWIP_ASSERT("memp_malloc: type < MEMP_MAX", type < MEMP_MAX);
197 #if SYS_LIGHTWEIGHT_PROT
198 SYS_ARCH_PROTECT(old_level);
199 #else /* SYS_LIGHTWEIGHT_PROT */
201 #endif /* SYS_LIGHTWEIGHT_PROT */
203 memp = memp_tab[type];
206 memp_tab[type] = memp->next;
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;
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);
222 mem = MEM_ALIGN((u8_t *)memp + sizeof(struct memp));
225 LWIP_DEBUGF(MEMP_DEBUG | 2, ("memp_malloc: out of memory in pool %d\n", type));
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 */
239 memp_free(memp_t type, void *mem)
242 #if SYS_LIGHTWEIGHT_PROT
243 SYS_ARCH_DECL_PROTECT(old_level);
244 #endif /* SYS_LIGHTWEIGHT_PROT */
249 memp = (struct memp *)((u8_t *)mem - sizeof(struct memp));
251 #if SYS_LIGHTWEIGHT_PROT
252 SYS_ARCH_PROTECT(old_level);
253 #else /* SYS_LIGHTWEIGHT_PROT */
255 #endif /* SYS_LIGHTWEIGHT_PROT */
258 lwip_stats.memp[type].used--;
259 #endif /* MEMP_STATS */
261 memp->next = memp_tab[type];
262 memp_tab[type] = memp;
264 #if MEMP_SANITY_CHECK
265 LWIP_ASSERT("memp sanity", memp_sanity());
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 */