def wait_for_ioc_start(self, time_between_tries=2):
"""
Waits for the run-control IOC to start.
:param time_between_tries: time to wait before checking if run control has started
:return:
"""
print_and_log("Waiting for runcontrol IOC to start ...")
started = False
loop_count = 0
while not started and loop_count < MAX_LOOPS_TO_WAIT_FOR_START:
loop_count += 1
# See if the IOC has restarted
try:
if ioc_restart_pending(self._prefix + RC_IOC_PREFIX, self._channel_access):
raise Exception()
latest_ioc_start = self._channel_access.caget(self._prefix + RC_START_PV)
if latest_ioc_start is None or (self._rc_ioc_start_time != "" and
latest_ioc_start <= self._rc_ioc_start_time):
raise Exception()
self._rc_ioc_start_time = latest_ioc_start
started = True
print_and_log("... Runcontrol IOC started")
except Exception as err:
sleep(time_between_tries)
if not started:
print_and_log("Runcontrol appears not to have started", "MAJOR")
else:
# wait for other RC PVs to appear
sleep(time_between_tries * 3)
def ioc_restart_pending(self, prefix, ioc):
"""Tests to see if an IOC restart is pending
Args:
prefix (string): The prefix for the instrument
ioc (string): The name of the IOC
Returns:
bool: Whether a restart is pending
"""
return ioc_restart_pending(self.generate_prefix(prefix, ioc), ChannelAccess)