from threading import Thread
import timeg_num=0
g_flag = 1def test1():global g_numglobal g_flagif g_flag ==1:for i in range(1000000):g_num += 1 g_flag = 0print('----test1----g_num=%d'%g_num)def test2():global g_numglobal g_flagwhile True:if g_flag != 1:for i in range(1000000):g_num += 1breakprint('----test2----g_num=%d' % g_num)
p1 = Thread(target=test1)
p1.start()p2 = Thread(target=test2)
p2.start()

from threading import Thread,Lock
import timeg_num=0def test1():global g_numfor i in range(1000000):mutex.acquire()  # 上锁g_num += 1mutex.release() #解锁print('----test1----g_num=%d'%g_num)def test2():global g_numfor i in range(1000000):mutex.acquire()  # 上锁g_num += 1mutex.release()  # 解锁print('----test2----g_num=%d' % g_num)mutex = Lock()p1 = Thread(target=test1)
p1.start()p2 = Thread(target=test2)
p2.start()

import threading# 创建全局变量threadLocal
loacl_school = threading.local()def process_student():# 获取当前线程关联的studentstd = loacl_school.studentprint(std)def process_thrad(name):# 绑定threadlocal的studentloacl_school.student = nameprocess_student()t1 = threading.Thread(target=process_thrad,args=('laowang',),name='thread-a')
t2 = threading.Thread(target=process_thrad,args=('xiaowang',),name='thread-b')t1.start()
t2.start()t1.join()
t2.join()

from ctypes import *
from threading import Thread# 加载动态库
lib = cdll.LoadLibrary('./libdeadloop.so')#创建一个子线程，让其执行C语言编写的函数，此函数是一个死循环
t = Thread(target=lib.DeadLoop)
t.start()# 主线程页调用C语言写的那个死循环函数
lib.DeadLoop()while True:pass

{while(1){;}
}

import threadingmylock = threading.RLock()
num = 0class myThread(threading.Thread):def __init__(self,name):threading.Thread.__init__(self,name=name)def run(self):global numwhile True:mylock.acquire()print('%s locked,Number:%d'% (threading.current_thread().name,num))if num>=4:mylock.release()print('%s locked,Number:%d'% (threading.current_thread().name,num))breaknum+=1print('%s locked,Number:%d'% (threading.current_thread().name,num))mylock.release()if __name__ =='__main__':thread1 = myThread('Thread_1')thread2 = myThread('Thread_2')thread1.start()thread2.start()