On 02/06/2018 10:52, Stefan Hajnoczi wrote: > Signed-off-by: Stefan Hajnoczi <stefa...@redhat.com> > --- > include/qemu/main-loop.h | 14 ++++++++++++++ > 1 file changed, 14 insertions(+) > > diff --git a/include/qemu/main-loop.h b/include/qemu/main-loop.h > index 6b4b60bf6d..721aa2416a 100644 > --- a/include/qemu/main-loop.h > +++ b/include/qemu/main-loop.h > @@ -168,6 +168,20 @@ void qemu_del_wait_object(HANDLE handle, WaitObjectFunc > *func, void *opaque); > /* async I/O support */ > > typedef void IOReadHandler(void *opaque, const uint8_t *buf, int size); > + > +/** > + * IOCanReadHandler: Return the number of bytes that #IOReadHandler can > accept > + * > + * This function reports how many bytes #IOReadHandler is prepared to accept. > + * #IOReadHandler may be invoked with up to this number of bytes. If this > + * function returns 0 then #IOReadHandler is not invoked. > + * > + * This function is typically called from an event loop. If the number of > + * bytes changes outside the event loop (e.g. because a vcpu thread drained > the > + * buffer), then it is necessary to kick the event loop so that this function > + * is called again. aio_notify() or qemu_notify_event() can be used to kick > + * the event loop. > + */ > typedef int IOCanReadHandler(void *opaque); > > /** >
Queued, thanks. Paolo
