def ping_multilaunch(port, stop_event):
"""
A single manager to ping all launches during multiprocess launches
:param port: (int) Listening port number of the DataServer
:param stop_event: (Thread.Event) stop event
"""
ds = DataServer(address=('127.0.0.1', port), authkey=DS_PASSWORD)
ds.connect()
lp = ds.LaunchPad()
while not stop_event.is_set():
for pid, lid in ds.Running_IDs().items():
if lid:
try:
os.kill(pid, 0) # throws OSError if the process is dead
lp.ping_launch(lid)
except OSError:
pass # means this process is dead!
stop_event.wait(PING_TIME_SECS)
