class Shared:
def __init__(self, n):
self.N = n
self.counter = 0
self.fibonacci = [0, 1] + [0] * n
self.threads = [0] * (n + 1)
self.mutex = Mutex()
self.event = Event()
self.event.signal()
for j in range(n + 1):
self.threads[j] = Semaphore(0)
self.threads[0].signal(1)
def fnc_fibonacci_seq(self, pin):
self.threads[pin].wait()
self.fibonacci[pin + 2] = self.fibonacci[pin] + self.fibonacci[pin + 1]
self.threads[pin + 1].signal()
def fnc_fibonacci_event(self, pin):
while True:
self.event.wait()
self.mutex.lock()
if self.counter == pin:
break
self.mutex.unlock()
self.mutex.unlock()
self.mutex.lock()
self.counter += 1
self.mutex.unlock()
self.fibonacci[pin + 2] = self.fibonacci[pin] + self.fibonacci[pin + 1]
self.event.signal()
class Barrier:
def __init__(self, n):
self.n = n
self.count = 0
self.mutex = Mutex()
self.event = Event()
def wait(self):
self.mutex.lock()
self.count += 1
if self.count == self.n:
self.event.signal()
self.mutex.unlock()
self.event.wait()
class SimpleBarrier:
def __init__(self, number_of_threads):
self.number_of_threads = number_of_threads
self.mutex = Mutex()
self.event = Event()
self.counter = 0
def wait(self):
self.mutex.lock()
self.counter += 1
if self.counter == self.number_of_threads:
self.event.signal()
self.mutex.unlock()
self.event.wait()
class Barrier():
def __init__(self, n):
self.mutex = Mutex()
self.event = Event()
self.counter = n
self.n = n
def wait(self):
self.mutex.lock()
self.counter -= 1
if(self.counter == 0):
self.counter = self.n
self.event.signal()
self.mutex.unlock()
return
self.mutex.unlock()
self.event.wait()
class ReusableBarrier:
def __init__(self, numberOfThreads):
self.numberOfThreads = numberOfThreads
self.mutex = Mutex()
self.event = Event()
self.counter = 0
def wait(self):
self.mutex.lock()
if self.counter == 0:
self.event.clear()
self.counter += 1
if self.counter == self.numberOfThreads:
self.event.signal()
self.counter = 0
self.mutex.unlock()
self.event.wait()