Subversion Repositories openrisc_2011-10-31

/*

 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without modification,

 * are permitted provided that the following conditions are met:

 *

 * 1. Redistributions of source code must retain the above copyright notice,

 *    this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright notice,

 *    this list of conditions and the following disclaimer in the documentation

 *    and/or other materials provided with the distribution.

 * 3. The name of the author may not be used to endorse or promote products

 *    derived from this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED

 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF

 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT

 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT

 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING

 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY

 * OF SUCH DAMAGE.

 *

 * This file is part of the lwIP TCP/IP stack.

 *

 * Author: Adam Dunkels <adam@sics.se>

 *

 */

#include "lwip/opt.h"

#include "lwip/memp.h"

#include "lwip/pbuf.h"

#include "lwip/udp.h"

#include "lwip/raw.h"

#include "lwip/tcp.h"

#include "lwip/api.h"

#include "lwip/api_msg.h"

#include "lwip/tcpip.h"

#include "lwip/sys.h"

#include "lwip/stats.h"

struct memp {

  struct memp *next;

};

#define MEMP_SIZE MEM_ALIGN_SIZE(sizeof(struct memp))

static struct memp *memp_tab[MEMP_MAX];

static const u16_t memp_sizes[MEMP_MAX] = {

  MEM_ALIGN_SIZE(sizeof(struct pbuf)),

  MEM_ALIGN_SIZE(sizeof(struct raw_pcb)),

  MEM_ALIGN_SIZE(sizeof(struct udp_pcb)),

  MEM_ALIGN_SIZE(sizeof(struct tcp_pcb)),

  MEM_ALIGN_SIZE(sizeof(struct tcp_pcb_listen)),

  MEM_ALIGN_SIZE(sizeof(struct tcp_seg)),

  MEM_ALIGN_SIZE(sizeof(struct netbuf)),

  MEM_ALIGN_SIZE(sizeof(struct netconn)),

  MEM_ALIGN_SIZE(sizeof(struct api_msg)),

  MEM_ALIGN_SIZE(sizeof(struct tcpip_msg)),

  MEM_ALIGN_SIZE(sizeof(struct sys_timeo))

};

static const u16_t memp_num[MEMP_MAX] = {

  MEMP_NUM_PBUF,

  MEMP_NUM_RAW_PCB,

  MEMP_NUM_UDP_PCB,

  MEMP_NUM_TCP_PCB,

  MEMP_NUM_TCP_PCB_LISTEN,

  MEMP_NUM_TCP_SEG,

  MEMP_NUM_NETBUF,

  MEMP_NUM_NETCONN,

  MEMP_NUM_API_MSG,

  MEMP_NUM_TCPIP_MSG,

  MEMP_NUM_SYS_TIMEOUT

};

#define MEMP_TYPE_SIZE(qty, type) \

  ((qty) * (MEMP_SIZE + MEM_ALIGN_SIZE(sizeof(type))))

static u8_t memp_memory[MEM_ALIGNMENT - 1 +

  MEMP_TYPE_SIZE(MEMP_NUM_PBUF, struct pbuf) +

  MEMP_TYPE_SIZE(MEMP_NUM_RAW_PCB, struct raw_pcb) +

  MEMP_TYPE_SIZE(MEMP_NUM_UDP_PCB, struct udp_pcb) +

  MEMP_TYPE_SIZE(MEMP_NUM_TCP_PCB, struct tcp_pcb) +

  MEMP_TYPE_SIZE(MEMP_NUM_TCP_PCB_LISTEN, struct tcp_pcb_listen) +

  MEMP_TYPE_SIZE(MEMP_NUM_TCP_SEG, struct tcp_seg) +

  MEMP_TYPE_SIZE(MEMP_NUM_NETBUF, struct netbuf) +

  MEMP_TYPE_SIZE(MEMP_NUM_NETCONN, struct netconn) +

  MEMP_TYPE_SIZE(MEMP_NUM_API_MSG, struct api_msg) +

  MEMP_TYPE_SIZE(MEMP_NUM_TCPIP_MSG, struct tcpip_msg) +

  MEMP_TYPE_SIZE(MEMP_NUM_SYS_TIMEOUT, struct sys_timeo)];

#if !SYS_LIGHTWEIGHT_PROT

static sys_sem_t mutex;

#endif

#if MEMP_SANITY_CHECK

static int

memp_sanity(void)

{

  s16_t i, c;

  struct memp *m, *n;

  for (i = 0; i < MEMP_MAX; i++) {

    for (m = memp_tab[i]; m != NULL; m = m->next) {

      c = 1;

      for (n = memp_tab[i]; n != NULL; n = n->next) {

        if (n == m && --c < 0) {

          return 0; /* LW was: abort(); */

        }

      }

    }

  }

  return 1;

}

#endif /* MEMP_SANITY_CHECK*/

void

memp_init(void)

{

  struct memp *memp;

  u16_t i, j;

#if MEMP_STATS

  for (i = 0; i < MEMP_MAX; ++i) {

    lwip_stats.memp[i].used = lwip_stats.memp[i].max =

      lwip_stats.memp[i].err = 0;

    lwip_stats.memp[i].avail = memp_num[i];

  }

#endif /* MEMP_STATS */

  memp = MEM_ALIGN(memp_memory);

  for (i = 0; i < MEMP_MAX; ++i) {

    memp_tab[i] = NULL;

    for (j = 0; j < memp_num[i]; ++j) {

      memp->next = memp_tab[i];

      memp_tab[i] = memp;

      memp = (struct memp *)((u8_t *)memp + MEMP_SIZE + memp_sizes[i]);

    }

  }

#if !SYS_LIGHTWEIGHT_PROT

  mutex = sys_sem_new(1);

#endif

}

void *

memp_malloc(memp_t type)

{

  struct memp *memp;

  void *mem;

#if SYS_LIGHTWEIGHT_PROT

  SYS_ARCH_DECL_PROTECT(old_level);

#endif

  LWIP_ASSERT("memp_malloc: type < MEMP_MAX", type < MEMP_MAX);

#if SYS_LIGHTWEIGHT_PROT

  SYS_ARCH_PROTECT(old_level);

#else /* SYS_LIGHTWEIGHT_PROT */  

  sys_sem_wait(mutex);

#endif /* SYS_LIGHTWEIGHT_PROT */  

  memp = memp_tab[type];

  if (memp != NULL) {

    memp_tab[type] = memp->next;

    memp->next = NULL;

#if MEMP_STATS

    ++lwip_stats.memp[type].used;

    if (lwip_stats.memp[type].used > lwip_stats.memp[type].max) {

      lwip_stats.memp[type].max = lwip_stats.memp[type].used;

    }

#endif /* MEMP_STATS */

    mem = (u8_t *)memp + MEMP_SIZE;

    LWIP_ASSERT("memp_malloc: memp properly aligned",

                ((mem_ptr_t)memp % MEM_ALIGNMENT) == 0);

  } else {

    LWIP_DEBUGF(MEMP_DEBUG | 2, ("memp_malloc: out of memory in pool %"S16_F"\n", type));

#if MEMP_STATS

    ++lwip_stats.memp[type].err;

#endif /* MEMP_STATS */

    mem = NULL;

  }

#if SYS_LIGHTWEIGHT_PROT

  SYS_ARCH_UNPROTECT(old_level);

#else /* SYS_LIGHTWEIGHT_PROT */

  sys_sem_signal(mutex);

#endif /* SYS_LIGHTWEIGHT_PROT */  

  return mem;

}

void

memp_free(memp_t type, void *mem)

{

  struct memp *memp;

#if SYS_LIGHTWEIGHT_PROT

  SYS_ARCH_DECL_PROTECT(old_level);

#endif /* SYS_LIGHTWEIGHT_PROT */  

  if (mem == NULL) {

    return;

  }

  memp = (struct memp *)((u8_t *)mem - MEMP_SIZE);

#if SYS_LIGHTWEIGHT_PROT

  SYS_ARCH_PROTECT(old_level);

#else /* SYS_LIGHTWEIGHT_PROT */  

  sys_sem_wait(mutex);

#endif /* SYS_LIGHTWEIGHT_PROT */  

#if MEMP_STATS

  lwip_stats.memp[type].used--;

#endif /* MEMP_STATS */

  memp->next = memp_tab[type];

  memp_tab[type] = memp;

#if MEMP_SANITY_CHECK

  LWIP_ASSERT("memp sanity", memp_sanity());

#endif  

#if SYS_LIGHTWEIGHT_PROT

  SYS_ARCH_UNPROTECT(old_level);

#else /* SYS_LIGHTWEIGHT_PROT */

  sys_sem_signal(mutex);

#endif /* SYS_LIGHTWEIGHT_PROT */  

}