多线程
#coding=utf8
import threading
import time
def test(p):
time.sleep(0.1)
print(p)
a = threading.Thread(target=test,args=[1])
b = threading.Thread(target=test,args=[1])
a.start()
b.start()
a.join()
b.join()
ts = []
for i in range(0,15):
th = threading.Thread(target=test,args=[i])
ts.append(th)
for i in ts:
i.start()
i.join()
mlock = threading.Lock()
num = 0
def change_num():
global num
mlock.acquire()
try:
num = num + 1
print("num = " + str(num))
finally:
# pass
mlock.release()
for x in range(1,10):
t = threading.Thread(target=change_num)
t.start()
t.join()
print("***********************")
线程同步
# coding=utf8
import threading
mylock = threading.RLock()
num = 0
class myThread(threading.Thread):
def __init__(self, name):
threading.Thread.__init__(self, name=name)
def run(self):
global num
while True:
mylock.acquire()
print '%s locked,Number : %d' % (threading.currentThread().name, num)
if num >= 4:
mylock.release()
print '%s released,Number:%d' % (threading.currentThread().name, num)
break
num += 1
print '%s released,Number:%d' % (threading.currentThread().name, num)
mylock.release()
if __name__ == '__main__':
thread1 = myThread('Thread_1')
thread2 = myThread('Thread_2')
thread1.start()
thread2.start()
