python線程之condition

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cond = threading.Condition()

 

# 類似lock.acquire()

cond.acquire()

 

# 類似lock.release()

cond.release()

 

# 等待指定觸發，同時會釋放對鎖的擷取,直到被notify才重新佔有瑣。

cond.wait()

 

# 發送指定，觸發執行

cond.notify()

import threading,timecond = threading.Condition()#cond.acquire()#cond.release()#cond.wait()#cond.notify()def aa():    print (‘thread_aa get‘)    cond.acquire()    time.sleep(5)    print (‘thread_aa finished first job‘)    cond.wait()#釋放對鎖的控制，好讓別的進程acquire到               #同時阻塞在此，等待得到鎖的那個進程的先cond.notify後(cond.wait或cond.release)    print (‘thread_aa get again‘)    time.sleep(5)    print (‘thread_aa finished all work‘)    cond.notify()#告訴剛才釋放鎖的那個進程等通知吧,等我要麼wait要麼release    cond.release()#釋放鎖def bb():    cond.acquire()    print (‘thread_bb get‘)    cond.notify()#告訴剛才釋放鎖的那個進程等通知吧,等我要麼wait要麼release    print (‘依然是我bb在運行‘)    time.sleep(5)    print (‘thread_bb finished first job‘)    cond.wait()#釋放對鎖的控制，而後被阻塞的aa就可以執行了            #同時阻塞在此，等待得到鎖的aa的先cond.notify後(cond.wait或cond.release)    print (‘thread_aa get again‘)        print (‘thread_bb finished all works‘)    cond.release()    a=threading.Thread(target=aa)a.start()time.sleep(2)b=threading.Thread(target=bb)b.start()

 

python線程之condition