Hi keir
Thank you for advice.
I'd like to attempt to change xc_readconsolering() interface.
Please let me confirm the following for my understanding.
- Xen should return the index of the oldest character on the console
 ring when the index that the caller specified is older than
 the range of the console ring.
- I think that Xen would return index position of "last" byte
 returned, not first byte.
Best regards,
Katsuhito Minai
On 11 Jul 2006, at 03:42 pm, Keir Fraser said:
>
> On 11 Jul 2006, at 02:28, MINAI Katsuhito wrote:
>
>> However, I also think that the "clear" interface is unnecessary.
>> I think that better solution is one of the following idea:
>> - modification to have independent read pointer of the buffer
>> for each commands and daemons just like reading usual file.
>> But, this might be difficult for hypervisor.
>
> Yes, this would be good. The caller could pass a start index and a
> length. Xen then returns characters from that index, up to length bytes
> (if available). If the given index is too far behind Xen's producer
> index, Xen would provide bytes from index position (producer -
> ring_size). In either case Xen would return index position of first
> byte returned.
>
> -- Keir
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