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# Python modules
import time
# 3rd party modules
import posix_ipc
# Utils for this demo
import utils
def process_notification(mq):
message, priority = mq.receive()
print ("Ding! Message with priority %d received: %s" % (priority, message))
# Re-register for notifications
mq.request_notification( (process_notification, mq) )
# Create the message queue.
mq = posix_ipc.MessageQueue(utils.QUEUE_NAME, posix_ipc.O_CREX)
# Request notifications
mq.request_notification( (process_notification, mq) )
# Get user input and send it to the queue.
s = "42"
while s:
print ("\nEnter a message. A blank message will end the demo:")
s = utils.get_input()
if s:
mq.send(s)
print ("Destroying the message queue.")
mq.close()
# I could call simply mq.unlink() here but in order to demonstrate
# unlinking at the module level I'll do it that way.
posix_ipc.unlink_message_queue(utils.QUEUE_NAME)
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