#并發(fā)運(yùn)行,效率高,但競(jìng)爭(zhēng)同一打印終端,帶來了打印錯(cuò)亂
from multiprocessing import Process
import time
def task(name):
  print("%s 1" % name)
  time.sleep(1)
  print("%s 2" % name)
  time.sleep(1)
  print("%s 3" % name)
if __name__ == '__main__':
  for i in range(3):
    p = Process(target=task, args=("子進(jìn)程%s" % i,))
    p.start()
'''
子進(jìn)程2 1
子進(jìn)程0 1
子進(jìn)程1 1
子進(jìn)程2 2
子進(jìn)程1 2
子進(jìn)程0 2
子進(jìn)程2 3
子進(jìn)程1 3
子進(jìn)程0 3
'''
          

            
from multiprocessing import Process, Lock
import time
def task(name, mutex):
  # 加鎖
  mutex.acquire()
  print("%s 1" % name)
  time.sleep(1)
  print("%s 2" % name)
  time.sleep(1)
  print("%s 3" % name)
  # 把鎖拆了
  mutex.release()
if __name__ == '__main__':
  # 建一個(gè)對(duì)象實(shí)例
  mutex = Lock()
  for i in range(3):
    # 把鎖傳給子進(jìn)程 讓所有子進(jìn)程用同一把鎖
    p = Process(target=task, args=("子進(jìn)程%s" % i, mutex))
    p.start()
'''
現(xiàn)在程序啟動(dòng) 所有進(jìn)程首先會(huì)去搶鎖 只有搶到鎖的才能運(yùn)行
等這個(gè)進(jìn)程運(yùn)行完了解鎖后 再到其他進(jìn)程繼續(xù)搶鎖
'''
'''
子進(jìn)程0 1
子進(jìn)程0 2
子進(jìn)程0 3
子進(jìn)程1 1
子進(jìn)程1 2
子進(jìn)程1 3
子進(jìn)程2 1
子進(jìn)程2 2
子進(jìn)程2 3
'''