239 lines
6.6 KiB
C
239 lines
6.6 KiB
C
/*
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* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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* OF SUCH DAMAGE.
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*
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* This file is part of the lwIP TCP/IP stack.
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*
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* Author: Adam Dunkels <adam@sics.se>
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*
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*/
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#include "lwip/opt.h"
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#include "lwip/memp.h"
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#include "lwip/pbuf.h"
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#include "lwip/udp.h"
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#include "lwip/raw.h"
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#include "lwip/tcp.h"
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#include "lwip/api.h"
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#include "lwip/api_msg.h"
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#include "lwip/tcpip.h"
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#include "lwip/sys.h"
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#include "lwip/stats.h"
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struct memp {
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struct memp *next;
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};
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#define MEMP_SIZE MEM_ALIGN_SIZE(sizeof(struct memp))
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static struct memp *memp_tab[MEMP_MAX];
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static const u16_t memp_sizes[MEMP_MAX] = {
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MEM_ALIGN_SIZE(sizeof(struct pbuf)),
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MEM_ALIGN_SIZE(sizeof(struct raw_pcb)),
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MEM_ALIGN_SIZE(sizeof(struct udp_pcb)),
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MEM_ALIGN_SIZE(sizeof(struct tcp_pcb)),
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MEM_ALIGN_SIZE(sizeof(struct tcp_pcb_listen)),
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MEM_ALIGN_SIZE(sizeof(struct tcp_seg)),
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MEM_ALIGN_SIZE(sizeof(struct netbuf)),
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MEM_ALIGN_SIZE(sizeof(struct netconn)),
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MEM_ALIGN_SIZE(sizeof(struct api_msg)),
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MEM_ALIGN_SIZE(sizeof(struct tcpip_msg)),
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MEM_ALIGN_SIZE(sizeof(struct sys_timeo))
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};
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static const u16_t memp_num[MEMP_MAX] = {
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MEMP_NUM_PBUF,
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MEMP_NUM_RAW_PCB,
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MEMP_NUM_UDP_PCB,
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MEMP_NUM_TCP_PCB,
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MEMP_NUM_TCP_PCB_LISTEN,
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MEMP_NUM_TCP_SEG,
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MEMP_NUM_NETBUF,
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MEMP_NUM_NETCONN,
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MEMP_NUM_API_MSG,
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MEMP_NUM_TCPIP_MSG,
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MEMP_NUM_SYS_TIMEOUT
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};
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#define MEMP_TYPE_SIZE(qty, type) \
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((qty) * (MEMP_SIZE + MEM_ALIGN_SIZE(sizeof(type))))
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static u8_t memp_memory[MEM_ALIGNMENT - 1 +
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MEMP_TYPE_SIZE(MEMP_NUM_PBUF, struct pbuf) +
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MEMP_TYPE_SIZE(MEMP_NUM_RAW_PCB, struct raw_pcb) +
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MEMP_TYPE_SIZE(MEMP_NUM_UDP_PCB, struct udp_pcb) +
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MEMP_TYPE_SIZE(MEMP_NUM_TCP_PCB, struct tcp_pcb) +
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MEMP_TYPE_SIZE(MEMP_NUM_TCP_PCB_LISTEN, struct tcp_pcb_listen) +
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MEMP_TYPE_SIZE(MEMP_NUM_TCP_SEG, struct tcp_seg) +
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MEMP_TYPE_SIZE(MEMP_NUM_NETBUF, struct netbuf) +
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MEMP_TYPE_SIZE(MEMP_NUM_NETCONN, struct netconn) +
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MEMP_TYPE_SIZE(MEMP_NUM_API_MSG, struct api_msg) +
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MEMP_TYPE_SIZE(MEMP_NUM_TCPIP_MSG, struct tcpip_msg) +
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MEMP_TYPE_SIZE(MEMP_NUM_SYS_TIMEOUT, struct sys_timeo)];
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#if !SYS_LIGHTWEIGHT_PROT
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static sys_sem_t mutex;
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#endif
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#if MEMP_SANITY_CHECK
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static int
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memp_sanity(void)
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{
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s16_t i, c;
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struct memp *m, *n;
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for (i = 0; i < MEMP_MAX; i++) {
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for (m = memp_tab[i]; m != NULL; m = m->next) {
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c = 1;
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for (n = memp_tab[i]; n != NULL; n = n->next) {
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if (n == m && --c < 0) {
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return 0; /* LW was: abort(); */
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}
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}
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}
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}
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return 1;
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}
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#endif /* MEMP_SANITY_CHECK*/
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void
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memp_init(void)
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{
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struct memp *memp;
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u16_t i, j;
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#if MEMP_STATS
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for (i = 0; i < MEMP_MAX; ++i) {
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lwip_stats.memp[i].used = lwip_stats.memp[i].max =
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lwip_stats.memp[i].err = 0;
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lwip_stats.memp[i].avail = memp_num[i];
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}
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#endif /* MEMP_STATS */
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memp = MEM_ALIGN(memp_memory);
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for (i = 0; i < MEMP_MAX; ++i) {
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memp_tab[i] = NULL;
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for (j = 0; j < memp_num[i]; ++j) {
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memp->next = memp_tab[i];
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memp_tab[i] = memp;
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memp = (struct memp *)((u8_t *)memp + MEMP_SIZE + memp_sizes[i]);
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}
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}
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#if !SYS_LIGHTWEIGHT_PROT
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mutex = sys_sem_new(1);
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#endif
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}
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void *
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memp_malloc(memp_t type)
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{
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struct memp *memp;
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void *mem;
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#if SYS_LIGHTWEIGHT_PROT
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SYS_ARCH_DECL_PROTECT(old_level);
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#endif
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LWIP_ASSERT("memp_malloc: type < MEMP_MAX", type < MEMP_MAX);
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#if SYS_LIGHTWEIGHT_PROT
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SYS_ARCH_PROTECT(old_level);
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#else /* SYS_LIGHTWEIGHT_PROT */
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sys_sem_wait(mutex);
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#endif /* SYS_LIGHTWEIGHT_PROT */
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memp = memp_tab[type];
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if (memp != NULL) {
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memp_tab[type] = memp->next;
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memp->next = NULL;
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#if MEMP_STATS
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++lwip_stats.memp[type].used;
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if (lwip_stats.memp[type].used > lwip_stats.memp[type].max) {
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lwip_stats.memp[type].max = lwip_stats.memp[type].used;
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}
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#endif /* MEMP_STATS */
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mem = (u8_t *)memp + MEMP_SIZE;
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LWIP_ASSERT("memp_malloc: memp properly aligned",
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((mem_ptr_t)memp % MEM_ALIGNMENT) == 0);
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} else {
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LWIP_DEBUGF(MEMP_DEBUG | 2, ("memp_malloc: out of memory in pool %"S16_F"\n", type));
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#if MEMP_STATS
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++lwip_stats.memp[type].err;
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#endif /* MEMP_STATS */
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mem = NULL;
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}
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#if SYS_LIGHTWEIGHT_PROT
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SYS_ARCH_UNPROTECT(old_level);
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#else /* SYS_LIGHTWEIGHT_PROT */
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sys_sem_signal(mutex);
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#endif /* SYS_LIGHTWEIGHT_PROT */
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return mem;
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}
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void
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memp_free(memp_t type, void *mem)
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{
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struct memp *memp;
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#if SYS_LIGHTWEIGHT_PROT
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SYS_ARCH_DECL_PROTECT(old_level);
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#endif /* SYS_LIGHTWEIGHT_PROT */
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if (mem == NULL) {
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return;
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}
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memp = (struct memp *)((u8_t *)mem - MEMP_SIZE);
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#if SYS_LIGHTWEIGHT_PROT
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SYS_ARCH_PROTECT(old_level);
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#else /* SYS_LIGHTWEIGHT_PROT */
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sys_sem_wait(mutex);
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#endif /* SYS_LIGHTWEIGHT_PROT */
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#if MEMP_STATS
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lwip_stats.memp[type].used--;
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#endif /* MEMP_STATS */
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memp->next = memp_tab[type];
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memp_tab[type] = memp;
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#if MEMP_SANITY_CHECK
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LWIP_ASSERT("memp sanity", memp_sanity());
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#endif
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#if SYS_LIGHTWEIGHT_PROT
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SYS_ARCH_UNPROTECT(old_level);
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#else /* SYS_LIGHTWEIGHT_PROT */
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sys_sem_signal(mutex);
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#endif /* SYS_LIGHTWEIGHT_PROT */
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}
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