def __init__(self, strg='CON', sync='SEMA', iters=10, turns=5):
"""
Named parameters:
strg: the strategy to use, defaults to console
sync: the synching mechanism, defaults to semaphores
iters: number of iterations to perform
turns: number of turns when synching mechanism is conditions
"""
if strg == 'CON':
self.strategy = ConsoleStrategy()
else:
raise Exception("Not yet implemented")
if sync == 'SEMA':
pingsema = Semaphore(1)
pongsema = Semaphore(0)
self.ping = PingPongThreadSema('ping', pingsema, pongsema, iters, self.strategy)
self.pong = PingPongThreadSema('pong', pongsema, pingsema, iters, self.strategy)
else:
rlock = RLock()
pingcond = Condition(rlock)
pongcond = Condition(rlock)
self.pong = PingPongThreadCond('pong', rlock, pongcond, pingcond, False, iters, turns, self.strategy)
self.ping = PingPongThreadCond('ping', rlock, pingcond, pongcond, True, iters, turns, self.strategy)
self.ping.set_other_thread_id(self.pong.__hash__())
self.pong.set_other_thread_id(self.ping.__hash__())
class PingPong(object):
"""
PingPong class.
Creates two threads to play ping pong.
"""
def __init__(self, strg='CON', sync='SEMA', iters=10, turns=5):
"""
Named parameters:
strg: the strategy to use, defaults to console
sync: the synching mechanism, defaults to semaphores
iters: number of iterations to perform
turns: number of turns when synching mechanism is conditions
"""
if strg == 'CON':
self.strategy = ConsoleStrategy()
else:
raise Exception("Not yet implemented")
if sync == 'SEMA':
pingsema = Semaphore(1)
pongsema = Semaphore(0)
self.ping = PingPongThreadSema('ping', pingsema, pongsema, iters, self.strategy)
self.pong = PingPongThreadSema('pong', pongsema, pingsema, iters, self.strategy)
else:
rlock = RLock()
pingcond = Condition(rlock)
pongcond = Condition(rlock)
self.pong = PingPongThreadCond('pong', rlock, pongcond, pingcond, False, iters, turns, self.strategy)
self.ping = PingPongThreadCond('ping', rlock, pingcond, pongcond, True, iters, turns, self.strategy)
self.ping.set_other_thread_id(self.pong.__hash__())
self.pong.set_other_thread_id(self.ping.__hash__())
def play(self):
"""
Play ping pong with threads.
"""
self.strategy.strg_prnt("Ready... Set... Go...")
self.strategy.begin()
self.ping.start()
self.pong.start()
self.strategy.await_done()
self.strategy.strg_prnt("Done!")
