minui: events: refactor event acquisition
Events are now delivered through a callback mechanism during
a call to ev_dispatch(). This will allow us to extend the events
code to handle other devices/fds, not just input. One such example
is the ability to process uevents.
During initialization, we provide an input callback to ev_init
that gets called when a new event is encountered during dispatch.
ev_get has been removed and replaced with ev_get_input() helper
function that can be called from inside the callback to attempt
to get an input event.
The existing client of ev_get in recovery has been split up such
that the input thread just calls ev_wait(); ev_dispatch(); and
the input_callback handles individual events by using the
ev_get_input() helper.
Change-Id: I24d8e71bd1533876b4ab1ae751ba200fea43c049
Signed-off-by: Dima Zavin <dima@android.com>
diff --git a/minui/minui.h b/minui/minui.h
index 2284a33..5a4168c 100644
--- a/minui/minui.h
+++ b/minui/minui.h
@@ -45,9 +45,20 @@
// see http://www.mjmwired.net/kernel/Documentation/input/ for info.
struct input_event;
-int ev_init(void);
+typedef int (*ev_callback)(int fd, short revents, void *data);
+
+int ev_init(ev_callback input_cb, void *data);
void ev_exit(void);
-int ev_get(struct input_event *ev, unsigned dont_wait);
+
+/* timeout has the same semantics as for poll
+ * 0 : don't block
+ * < 0 : block forever
+ * > 0 : block for 'timeout' milliseconds
+ */
+int ev_wait(int timeout);
+
+int ev_get_input(int fd, short revents, struct input_event *ev);
+void ev_dispatch(void);
// Resources