#encoding=utf-8

 """

 python多线程，并非真正意义上的多线程

 全局锁：在指定时间里，有且只有一个线程在运行

  """

 import threading

 import time

 def test(p):

     time.sleep(0.1)

     print p

 # a = threading.Thread(target=test)

 # b = threading.Thread(target=test)

 # a.start()

 # b.start()

 #

 # a.join()

 # b.join()

 lst =[]

 for i in xrange(0, 15):

     th = threading.Thread(target=test, args=[i])

     lst.append(th)

 for i in lst:

     i.start()

 for i in lst:

     i.join()

 print "primary thread end!!!"

 #encoding=utf-8

 """

 1、python全局锁：GLT

   python多线程在任意时刻下只有一个线程在运行，它是线程安全的

 """

 import threading

 num = 0

 def t():

     global num

     num +=1

     print num

 for i in xrange(0, 10):

     d = threading.Thread(target=t)

     d.start()

 import time

 b_time = time.time()

 _a = threading.Thread(target=t)

 _b = threading.Thread(target=t)

 _a.start()

 _b.start()

 _a.join()

 _b.join()

 print time.time()-b_time

 """

 加锁：acquire()

 解锁：release()

 RLock()可重入锁

 """

 import threading

 mlock = threading.Lock()

 #mlock = threading.RLock()

 num_01 = 0

 def a():

     global num_01

     mlock.acquire()

     num_01 += 1

     mlock.release()

     print num_01

 for i in xrange(0, 10):

     d = threading.Thread(target=a)

     d.start()