Re: [lwip-users] lwip and OS - memory management

[address@hidden]

I guess these checks should be omitted when using the heap instead of pools.

Simon


Martin Velek wrote:
> Hi,
>
> there is a sanity check in init.c
>
> #if (LWIP_UDP&&  (MEMP_NUM_UDP_PCB<=0))
>    #error "If you want to use UDP, you have to define
> MEMP_NUM_UDP_PCB>=1 in your lwipopts.h"
> #endif
> #if (LWIP_TCP&&  (MEMP_NUM_TCP_PCB<=0))
>    #error "If you want to use TCP, you have to define
> MEMP_NUM_TCP_PCB>=1 in your lwipopts.h"
> #endif
> /* There must be sufficient timeouts, taking into account requirements
> of the subsystems. */
> #if ((NO_SYS==0)&&  (MEMP_NUM_SYS_TIMEOUT<  (LWIP_TCP + IP_REASSEMBLY
> + LWIP_ARP + (2*LWIP_DHCP) + LWIP_AUTOIP + LWIP_IGMP + LWIP_DNS +
> PPP_SUPPORT)))
>    #error "MEMP_NUM_SYS_TIMEOUT is too low to accomodate all required timeouts"
> #endif
>
> etc.
>
> I will try to find if these values have effect.
>
> Martin
>
>
> On 1 March 2010 10:45, Kieran Mansley<address@hidden>  wrote:
>    
> > On Sun, 2010-02-28 at 13:16 +0100, Martin Velek wrote:
> >      
> > > Hello,
> > >
> > > I am running a lwip 1.3.2 with FreeRTOS. I am using own
> > > malloc/free/calloc/realloc memory management. What should I setup in
> > > the lwipopts.h if I would like use only malloc/free... functions for
> > > pbuf's, internal sturctures (arp tables?) and OS support?
> > >
> > > Currently I have:
> > >
> > > #define SYS_LIGHTWEIGHT_PROT            1
> > > #define NO_SYS                                             0
> > >
> > > #include<stdlib.h>  // there are undeclared referneces to free...
> > > #define MEM_LIBC_MALLOC                 1
> > > #define MEMP_MEM_MALLOC                 1
> > > #define MEM_USE_POOLS                   0
> > >
> > > Can I do not care about PBUF_POOL_SIZE,
> > >        
> > As you've set MEMP_MEM_MALLOC to 1 you will be using malloc instead of
> > memp_malloc, and so the PBUF_POOL_SIZE is irrelevant.
> >
> >      
> > > MEM_SIZE,
> > >        
> > This would normally specify the heap size used for mem_malloc, so you
> > don't need it. You might want to check that mem_init isn't called to
> > avoid wasting memory.
> >
> >      
> > > MEMP_NUM_PBUF,
> > > MEMP_NUM_NETBUF, etc?
> > >        
> > As you've defined MEMP_MEM_MALLOC to 1 the other MEMP_ values are all
> > unused I think.  You should probably still set them to zero rather than
> > undefined though.
> >
> > If you have problems with any of this let us know as the dependencies
> > are complex and it wouldn't surprise me if there was a mistake
> > somewhere.
> >
> > Kieran
> >
> >
> >
> > _______________________________________________
> > lwip-users mailing list
> > address@hidden
> > http://lists.nongnu.org/mailman/listinfo/lwip-users
> >
> >      
>
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