RE : RE : RE : RE : [lwip-users] managing storage problems.

[Frédéric BERNON]

>Don't get me wrong - I agree. I was just saying that whatever the solution is, 
>it cannot absolutely rely on requesting a mailbox of size X really giving you 
>a mailbox of size exactly X.

Sure, so, we are agree

>(By the way, you mean favor, not flavor which is quite a different word :-)).

Eh eh :) 
  
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-----Message d'origine-----
De : address@hidden [mailto:address@hidden De la part de Jonathan Larmour
Envoyé : mardi 30 octobre 2007 17:54
À : Mailing list for lwIP users
Objet : Re: RE : RE : RE : [lwip-users] managing storage problems.


Frédéric BERNON wrote:
>> Be warned that some OSes have fixed mailbox sizes. Any design would 
>> need to  allow for that. Embedded systems favour static objects with 
>> deterministic access. Dynamic sizing loses that. For example, eCos 
>> has both sorts so it _can_ be done, but the variable size mailbox 
>> implementation is bigger + slower + non-deterministic.
> 
> [snip]
> Have a netconn::mbox with
> the same size that netconn::recvmbox doesn't seem useful. I think that 
> adding a size parameter to sys_mbox_new is a good solution (like we 
> have add the stacksize to sys_thread_new). If your OS doesn't support 
> that, you don't have to use it. Since there is no lot of sys_mbox_new 
> calls (I count 8 in cvs head), and since these calls are not on 
> critical paths (send/recv calls), I stay in flavor to change it (after 
> 1.3.0).

Don't get me wrong - I agree. I was just saying that whatever the solution is, 
it cannot absolutely rely on requesting a mailbox of size X really giving you a 
mailbox of size exactly X.

(By the way, you mean favor, not flavor which is quite a different word :-)).

Jifl
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