[ECOS] bsd sockets question

[ECOS] bsd sockets question

[Will Wagner]

Hi All,

I have a bsd sockets question.

My application has two threads. One thread is waiting on receiving data 
on a socket using the select function, with a timeout of forever.

The other thread calls close on that socket.

I was hoping that upon calling close the select function would return 
with an error. Instead it continues to block. This thread works on linux 
and windows so I was hoping it was standard BSD sockets functionality.

Should this be working or does eCos not support this? If it doesn't 
support it does anyone have any ideas how to implement it, or even where 
to start?

Many thanks,

Will.
-- 
------------------------------------------------------------------------
Will Wagner                                     will_wagner@carallon.com
Senior Project Engineer                        Office Tel: 0207 371 2032
Carallon Ltd, Studio G20, Shepherds Building, Rockley Rd, London W14 0DA
------------------------------------------------------------------------


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[ECOS] Re: bsd sockets question

[Grant Edwards]

In gmane.os.ecos.general, you wrote:

> My application has two threads. One thread is waiting on
> receiving data on a socket using the select function, with a
> timeout of forever.
>
> The other thread calls close on that socket.
>
> I was hoping that upon calling close the select function would
> return with an error. Instead it continues to block. This
> thread works on linux and windows so I was hoping it was
> standard BSD sockets functionality.
>
> Should this be working or does eCos not support this? If it
> doesn't support it does anyone have any ideas how to implement
> it, or even where to start?

One possible work-around is to call select_with_abort() instead
of select().  Then when you want to shutdown, call close() and
then cyg_select_abort().

-- 
Grant Edwards                   grante             Yow!  Is this ANYWHERE,
                                  at               USA?
                               visi.com            

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Re: [ECOS] bsd sockets question

[Matt Jerdonek]

One solution is to have the thread that is closing the
socket invoke cyg_thread_release(..) on the thread
that is blocking on the select operation.

-- Matt

--- Will Wagner <will_wagner@carallon.com> wrote:

> Hi All,
> 
> I have a bsd sockets question.
> 
> My application has two threads. One thread is
> waiting on receiving data 
> on a socket using the select function, with a
> timeout of forever.
> 
> The other thread calls close on that socket.
> 
> I was hoping that upon calling close the select
> function would return 
> with an error. Instead it continues to block. This
> thread works on linux 
> and windows so I was hoping it was standard BSD
> sockets functionality.
> 
> Should this be working or does eCos not support
> this? If it doesn't 
> support it does anyone have any ideas how to
> implement it, or even where 
> to start?
> 
> Many thanks,
> 
> Will.
> -- 
>
------------------------------------------------------------------------
> Will Wagner                                    
> will_wagner@carallon.com
> Senior Project Engineer                       
> Office Tel: 0207 371 2032
> Carallon Ltd, Studio G20, Shepherds Building,
> Rockley Rd, London W14 0DA
>
------------------------------------------------------------------------
> 
> 
> -- 
> Before posting, please read the FAQ:
> http://ecos.sourceware.org/fom/ecos
> and search the list archive:
> http://ecos.sourceware.org/ml/ecos-discuss
> 
> 



	
		
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Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
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