r = enable_event(han, event, None)
self.assertGreaterEqual(r, 0, strerror(r))
r = enable_event(han, event, None)
self.assertGreaterEqual(r, 0, strerror(r))
#Context test
r = add_context(han, ctx, "sched_switch", "channel0")
self.assertGreaterEqual(r, 0, strerror(r))
#Context test
r = add_context(han, ctx, "sched_switch", "channel0")
self.assertGreaterEqual(r, 0, strerror(r))