evenodd threads semaphore
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import threading
class odd_thread(threading.Thread):
def __init__(self, thread_name, thread_ID):
threading.Thread.__init__(self)
self.thread_name = thread_name
self.thread_ID = thread_ID
def run(self):
global counter
while(counter < 20):
odd_sem.acquire()
print(f"odd: {counter}")
counter+=1;
even_sem.release()
class even_thread(threading.Thread):
def __init__(self, thread_name, thread_ID):
threading.Thread.__init__(self)
self.thread_name = thread_name
self.thread_ID = thread_ID
def run(self):
global counter
while(counter < 20):
even_sem.acquire()
print(f"even: {counter}")
counter+=1;
odd_sem.release()
print("Hello World!")
counter = 1
counter_mutex = threading.Lock()
odd_sem = threading.Semaphore(1)
even_sem = threading.Semaphore(0)
thread_odd = odd_thread("odd", 1)
thread_even = even_thread("even", 2)
thread_odd.start()
thread_even.start()
thread_odd.join()
thread_even.join()
print("Good bye world")
Python
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