semaphore.release()
utils.say("acquiring the semaphore...")
semaphore.acquire()
# Once the call to .acquire() completes, I own the shared resource and
# I'm free to read from the memory.
s = utils.read_from_memory(memory)
# What I read must be the md5 of what I wrote or something's gone wrong.
if PY_MAJOR_VERSION > 2:
what_i_wrote = what_i_wrote.encode()
try:
assert(s == hashlib.md5(what_i_wrote).hexdigest())
except AssertionError:
flex_utils.raise_error(AssertionError,
"Shared memory corruption after %d iterations." % i)
# MD5 the reply and write back to Mrs. Conclusion.
if PY_MAJOR_VERSION > 2:
s = s.encode()
what_i_wrote = hashlib.md5(s).hexdigest()
utils.write_to_memory(memory, what_i_wrote)
# Announce for one last time that the semaphore is free again so that
# Mrs. Conclusion can exit.
if not params["LIVE_DANGEROUSLY"]:
utils.say("Final release of the semaphore followed by a 5 second pause")
semaphore.release()
time.sleep(5)
# ...before beginning to wait until it is free again.
# If the message is what I wrote, put it back on the queue.
while s == what_i_sent:
# Nothing new; give Mrs. Conclusion another chance to respond.
mq.send(s)
s, _ = mq.receive()
s = s.decode()
utils.say("Received %s" % s)
# What I read must be the md5 of what I wrote or something's
# gone wrong.
if PY_MAJOR_VERSION > 2:
what_i_sent = what_i_sent.encode()
try:
assert (s == hashlib.md5(what_i_sent).hexdigest())
except AssertionError:
flex_utils.raise_error(AssertionError,
"Message corruption after %d iterations." % i)
# MD5 the reply and write back to Mrs. Conclusion.
s = hashlib.md5(s.encode()).hexdigest()
utils.say("Sending %s" % s)
mq.send(s)
what_i_sent = s
utils.say("")
utils.say("%d iterations complete" % (i + 1))
utils.say("Destroying the message queue.")
mq.remove()
while s == what_i_sent:
# Nothing new; give Mrs. Premise another chance to respond.
mq.send(s)
s, _ = mq.receive()
s = s.decode()
utils.say("Received %s" % s)
if what_i_sent:
if PY_MAJOR_VERSION > 2:
what_i_sent = what_i_sent.encode()
try:
assert(s == hashlib.md5(what_i_sent).hexdigest())
except:
flex_utils.raise_error(AssertionError,
"Message corruption after %d iterations." % i)
#else:
# When what_i_sent is blank, this is the first message which
# I always accept without question.
# MD5 the reply and write back to Mrs. Premise.
s = hashlib.md5(s.encode()).hexdigest()
utils.say("Sending %s" % s)
mq.send(s)
what_i_sent = s
utils.say("")
utils.say("%d iterations complete" % (i + 1))