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

[Martin Velek]

Thanks. I will post a bug report.
These checks are in the file init.c without
#if !MEMP_MEM_MALLOC
sanity check...
#endif

Regards,
Martin

On 1 March 2010 20:15, address@hidden <address@hidden> wrote:
> 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
>>>
>>>
>>>
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>>>
>>>
>>
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