Re: [Qemu-devel] sane char device writes?

[Paolo Bonzini]

On 28/11/2016 16:53, Michal Suchánek wrote:
>> > 
>> > My idea looks very much like Michal's.  I hadn't gone very much beyond
>> > the "you need a buffer" step, but anyway you don't need a timer---you
>> > can just record a chr_accept_input callback in gd_vc_handler.  It will
>> > be called when the front-end is ready to get more characters.
> 
> Where will the characters come from, though? 

>From ui/gtk.c's own buffer.

> This might solve the console ui hack since it has a pipe buffer it can
> peek and read in pieces but the gtk ui gets a whole paste buffer in an
> event callback and has to handle it whole before it returns from the
> gtk event callback. Unless it stores the data that does not fit into
> the serial fifo somewhere it has to drop it on the floor or block.

Yes, gtk needs to have a buffer of its own (probably it should
dynamically allocate it too, so that it can grow and shrink and the
limit on the size can be higher).

Paolo