Re: [lwip-users] [lwip users] using threads in our application safely???

[Durgaprasad Chivukula]

  Hi Bertrik ,

 

    Can  you please , give me a small example of the code , which you mentioned in your earlier reply to me regarding making a blocking call to main_thread and where to place it in my code...??

 

Thanks

Durga

 

On 10/10/05, Durgaprasad Chivukula <address@hidden> wrote:

On 10/10/05, Bertrik Sikken < address@hidden> wrote:

>I'm no lwIP expert but here are my thoughts:

 

    Thanks for your reply..even I am new to lwip

>* Why are you starting main_thread as a separate thread?

>As far as I can see, there is no need to do so and you can just make a blocking call to >main_thread instead.

 

  I saw the example in the /unix/proj/unixsim/simhost.c example and exactly written my application.Can you please provide me with a piece of code , how can I make a blocking call to main_thread..and where should I add it in my code .??

 

>* It seems to me that you are trying to do a lot of complicated things all at once.

>Try to keep things as simple as possible, so start with something simple that works,

>then add some more functionality and check if it still works, etc.

 

     Yes you are right  , I included all the command line interface of the tftp client in my main_changed.c  , I will make it simple first , please provide me with the code for  blocking call to main_thread , as you already had a look on my code ..I guess .. that would be helpful to me

 

>* Aren't you missing a netif_set_up call somewhere?

>I would expect this just after the netif_add call.

 

    Yes you are right ... I added the netif_set_up function  after the netif_add call ..Thanks for your correction

 

  

 

Kind regards,

 

Bertrik Sikken
System Designer
Technolution B.V.
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---

From: lwip-users-bounces+bertrik.sikken=address@hidden [mailto:address@hidden ] On Behalf Of Durgaprasad Chivukula
Sent: maandag 10 oktober 2005 11:34
To: Mailing list for lwIP users
Cc: address@hidden
Subject: [lwip-users] [lwip users] using threads in our application safely???

 

 

Hi Friends ,

 

         I already posted lot of questions to this group regarding my tftp client implementation of lwip , but I did not get any replies .I also posted my source code implementation , but the same. I hope you can guide me with my probelm this time . As I said I am writing a tftp client application on lwip using the socket API ,tapif interface (using bridge configuration ) on Redhat linux 2.4.20-8 . I need to put and get files from/ to a remote server. But both   put and get are not working.While getting I am only getting first 512 bytes and then tapif_input function halts I am creating only 1 thread in my application and I guess this is making problems , How can I use thread mechanism safely in my application ??? I am herewith attaching my implementation to this email , please have a look and suggest me in this ...Help!!!!!!!

 

 

 Also one more thing is I profile my whole stack using gprof /Functioncheck (profiling tools on linux ) as a part of my work , these tools are giving erroneous(wrong) results  for example sys_arch_sem_wait is called 744 times , sys_sem_signal is called 699 times ...and so on.... do u guys really think that these functions are called this many number of times.... I run my application and then run the tool , so it is a dynamic execution profiler.....I guess there is a problem with my thread implementation....

 

Please find below attached source code of my tftp client....in a zip file ... the important parts of the code to look at are

 

1. main_changed.c   (main function , main_thread function , setpeer , get ,put

2. tftp_changed.c    (tftp_sendfile , tftp_recvfile)

3.tftpsubs_changed.c (which implements the buffer  mechanism )

 

 

Please help me!!!!!

 

 

Regards

Durga

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