Re: [lwip-users] LwIP 1.41 select does not return ?

[Noam Weissman]

Hi Arpit,

I am not sure I need to check.

I know that the code uses something called virtual file system for devices that do not have

a file system. Maybe you have a point there 😊... I will check that, thanks.

when I commented the call to select and left to code to block on accept it also did not return

when a connection was made.

In general a server code:

create socket,

set options,

bind,

listen,

accept

They do about the same but for some reason their code hangs ?.. so it should be something else

related to the porting or file system as you mentioned.

Thanks for everyone that made notes...

BR,

Noam.

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From: lwip-users <lwip-users-bounces+address@hidden> on behalf of Arpit Agarwal <address@hidden>
Sent: Wednesday, May 31, 2017 6:33 PM
To: Mailing list for lwIP users
Subject: Re: [lwip-users] LwIP 1.41 select does not return ?

 

Hi Noam,

Just to clarify another thing, is the environment where you are trying to use lwip_select also uses select for file descriptors ?
If yes then there is a possibility of malfunctioning as if I am not wrong lwip_select is not meant to be used with file descriptors as opposed normal BSD style select which is normally meant for both file and socket descriptors.

I used to face similar problems when porting lwip to an RTOS with POSIX compliance  / BSD-style API support.

If this is not the case, then probably I have no clue what might be causing this malfunctioning as I don't have the code and environment you are using.

-- 

Thanks & Regards,

ARPIT AGARWAL

Alumni, Department Of CSE

IIT Guwahati-781039 (INDIA)

M: (+91)-8792793063

E: address@hidden

    address@hidden

-----------------------------------------------------------------------------------------

“ The greater part of progress is the desire to progress. ” — Seneca

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From: lwip-users <lwip-users-bounces+address@hidden> on behalf of Noam Weissman <address@hidden>
Sent: Wednesday, May 31, 2017 8:44 PM
To: Mailing list for lwIP users
Subject: Re: [lwip-users] LwIP 1.41 select does not return ?

 

Thanks I will check that tomorrow :-)

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From: lwip-users <lwip-users-bounces+address@hidden> on behalf of goldsimon <address@hidden>
Sent: Wednesday, May 31, 2017 5:53 PM
To: Mailing list for lwIP users
Subject: Re: [lwip-users] LwIP 1.41 select does not return ?

 

Noam Weissman:
>Were is the semaphore released ?

In "event_callback()", if I remember correctly.

Simon

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