[Bluez-users] Usage of fcntl for non blocking mode...

[Bluez-users] Usage of fcntl for non blocking mode...

[Tushar Paturde]

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Hi,
I'm getting some problem while using Bluez hci function calls. The pseudo
code is as under:

...
devId = hci_devid(addr);
sock = hci_open_dev(devId);
...
fcntl(sock, F_SETFL, O_NONBLOCK); /** whats the problem ??? */
...
hci_read_local_name(sock, size, name, 0)
....


If I comment call to fcntl()  , I get correct name of device by using
hci_read_local_name() function.
But if the call is made to fcntl(),  subsequent  calls of hci_* function
does not work properly. In fact hci_read_local_name()  returns  null name.
Any idea what is the problem with usage of  fcntl() this way ?

Regards,

Tushar Paturde

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Re: [Bluez-users] Usage of fcntl for non blocking mode...

[Marcel Holtmann]

Hi Tushar,

> I'm getting some problem while using Bluez hci function calls. The
> pseudo code is as under:
> 
> ...
> devId = hci_devid(addr);
> sock = hci_open_dev(devId);
> ...
> fcntl(sock, F_SETFL, O_NONBLOCK); /** whats the problem ??? */
> ...
> hci_read_local_name(sock, size, name, 0)
> ....
> 
> 
> If I comment call to fcntl()  , I get correct name of device by using
> hci_read_local_name() function. 
> But if the call is made to fcntl(),  subsequent  calls of hci_*
> function does not work properly. In fact hci_read_local_name()
> returns  null name.  
> Any idea what is the problem with usage of  fcntl() this way ?

I never tried to have a non-blocking HCI socket. And I have no idea why
you actually need it. It is better to use the D-Bus API anyway.

Regards

Marcel



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Re: [Bluez-users] Usage of fcntl for non blocking mode...

[Tushar Paturde]

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Actually this code is part of bluetooth implementation of jsr82 in phonme
project.
Does making non-blocking HCI socket helps in any way for function calls such
as  hci_send_cmd ?. Or is there any other advantage ?


Regards,
Tushar



On 4/2/07, Marcel Holtmann <marcel@holtmann.org> wrote:
>
> Hi Tushar,
>
> I never tried to have a non-blocking HCI socket. And I have no idea why
> you actually need it. It is better to use the D-Bus API anyway.
>
> Regards
>
> Marcel
>
>
>
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-- 
Tushar Paturde

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Re: [Bluez-users] Usage of fcntl for non blocking mode...

[Marcel Holtmann]

Hi Tushar,

> Actually this code is part of bluetooth implementation of jsr82 in
> phonme project.
> Does making non-blocking HCI socket helps in any way for function
> calls such as  hci_send_cmd ?. Or is there any other advantage ?

no. It makes no difference. The HCI socket has specific semantics
anyway.

Regards

Marcel



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