[lwip-users] memp_malloc: out of memory in pool

[Ran Shalit]

Hello,

I am trying to port lwip to uc/os (I use lwip 1.4.1).
But I get on packet recieve, immediately at first try "out of memory
in pool " error as following:
"
pbuf_alloc(length=  96)
memp_malloc: out of memory in pool PBUF_POOL
pbuf_alloc: allocated pbuf 0"


I observed memp_malloc(memp_t) routine but not sure I undetsand how it
works, and why it fails.
What reason could be for memp = memp_tab[type]; returning null ?
Is memp_tab allocated static at compile time ? Does it mean some
configuration parameter is wrong (lwipopts.h) ?


memp_malloc(memp_t type)
{
  struct memp *memp;
  SYS_ARCH_DECL_PROTECT(old_level);

  LWIP_ERROR("memp_malloc: type < MEMP_MAX", (type < MEMP_MAX), return NULL;);

  SYS_ARCH_PROTECT(old_level);
#if MEMP_OVERFLOW_CHECK >= 2
  memp_overflow_check_all();
#endif /* MEMP_OVERFLOW_CHECK >= 2 */

  memp = memp_tab[type];

  if (memp != NULL) {
 ....
} else {
    LWIP_DEBUGF(MEMP_DEBUG | LWIP_DBG_LEVEL_SERIOUS, ("memp_malloc:
out of memory in pool %s\n", memp_desc[type]));
    MEMP_STATS_INC(err, type);
  }


Best Regards,
Ran