def check_emergency_stop(check, poll_interval=0.1*q.s, exit_session=False):
"""
check_emergency_stop(check, poll_interval=0.1*q.s, exit_session=False)
If a callable *check* returns True abort is called. Then until it clears to False nothing is
done and then the process begins again. *poll_interval* is the interval at which *check* is
called. If *exit_session* is True the session exits when the emergency stop occurs.
"""
while True:
if check():
futures = abort()
LOG.error('Emergency stop')
wait(futures)
if exit_session:
os.abort()
while check():
# Wait until the flag clears
time.sleep(poll_interval.to(q.s).magnitude)
time.sleep(poll_interval.to(q.s).magnitude)
def test_abort_all(self):
devices = [self.device, MockDevice()]
wait(abort(devices))
for device in devices:
self.assertTrue(device.aborted)
