[Qemu-devel] Re: [PATCH v4 3/5] char: unix/tcp: Add a non-blocking write handler

[Gerd Hoffmann]

On 05/04/10 09:17, Amit Shah wrote:
> Add a non-blocking write handler that can return with -EAGAIN to the
> caller and also callback when the socket becomes writable.
>
> Non-blocking writes are only enabled for sockets that are opened in
> non-blocking mode and only for callers that have registered a callback
> handler for resuming writes.

The logic will be pretty much the same for all filehandle-based backends 
on unix.  So maybe create some helper functions, so implementing 
$backend_chr_write_unblocked can be done with just three lines of code?

cheers,
  Gerd