class Philosopher(Thread):
def __init__(self, forks=None, store=None, name=None):
super(Philosopher, self).__init__()
if forks:
self.forks = forks
else:
self.forks = ["fork.1", "fork.2"]
if store:
self.store = store
else:
self.store = Store()
if name:
self.name = name
else:
self.name = id(self)
def getforks(self):
gotforks = False
while not gotforks:
try:
X = self.store.using(*self.forks)
if all([X[fork].value for fork in self.forks], None):
for fork in self.forks:
X[fork].value = self.name
X.commit()
gotforks = True
else:
time.sleep(random.random())
except ConcurrentUpdate:
time.sleep(random.random())
except BusyRetry:
time.sleep(random.random())
print("Got forks!", self.name, self.forks)
return X
def releaseforks(self, X):
print("releasing forks", self.name)
for fork in self.forks:
X[fork].value = None
X.commit()
def run(self):
while 1:
X = self.getforks()
time.sleep(0.2)
self.releaseforks(X)
time.sleep(0.3 + random.random())
class Philosopher(Thread):
def __init__ (self,forks = None, store=None,name=None):
super(Philosopher,self).__init__()
if forks:
self.forks = forks
else:
self.forks = ["fork.1", "fork.2"]
if store:
self.store = store
else:
self.store = Store()
if name:
self.name = name
else:
self.name = id(self)
def getforks(self):
gotforks = False
while not gotforks:
try:
X = self.store.using(*self.forks)
if all([ X[fork].value for fork in self.forks], None):
for fork in self.forks:
X[fork].value = self.name
X.commit()
gotforks = True
else:
time.sleep(random.random())
except ConcurrentUpdate:
time.sleep(random.random())
except BusyRetry:
time.sleep(random.random())
print ("Got forks!", self.name, self.forks)
return X
def releaseforks(self,X):
print ("releasing forks", self.name)
for fork in self.forks:
X[fork].value = None
X.commit()
def run(self):
while 1:
X = self.getforks()
time.sleep(0.2)
self.releaseforks(X)
time.sleep(0.3+random.random())
