1. �� 트 ¶

http://linuxgazette.net/107/pai.html

2. �� ¶

�� 하�� 하�� 하��

~cpp
import time
import thread

def myfunction(string,sleeptime,*args):
    while 1:
       
        print string
        time.sleep(sleeptime) #sleep for a specified amount of time.

if __name__=="__main__":

    thread.start_new_thread(myfunction,("Thread No:1",2))

    while 1:pass

2.1. Lock ¶

lock�� 하��? -> 하�� 하�� . �� 할�� 하�� 하�� .
- �� 황 �� : count �� 1�� 키�� 한 �� 키�� 키�� 2 �� 해��하�� 1�� 하�� ..

~cpp
import time
import thread

def myfunction(string,sleeptime,lock,*args):
    while 1:
	#entering critical section
        lock.acquire() 
        print string," Now Sleeping after Lock acquired for ",sleeptime
        time.sleep(sleeptime) 
        print string," Now releasing lock and then sleeping again"
        lock.release()
	#exiting critical section
        time.sleep(sleeptime) # why?

if __name__=="__main__":

    lock=thread.allocate_lock()
    thread.start_new_thread(myfunction,("Thread No:1",2,lock))
    thread.start_new_thread(myfunction,("Thread No:2",2,lock))

    while 1:pass

�� why ��,, �� sleep�� ?(�� 한�� 하�� ) -> Python �� threadsafe 하�� . Python�� 한 �� 하�� . �� 하�� 한��.
�� built-in 함�� 행할�� I/O�� 한 block waiting �� 하�� .(time.sleep(), file.read(), select.select()) �� 한��)
lock ��태�� acquire() 함�� 하�� interrupt 하�� 하�� . (키�� 트�� lock�� .)
�� starvation�� 킨��.

~cpp
hile 1:
	lock.acquire()
	.....
	#some operation
	.....
	lock.release()

----
Python

Python Thread Programming

Contents

1. �� 트 ¶

2. �� ¶

2.1. Lock ¶

Python Thread Programming

Contents

1. ������ ������트 ¶

2. ������ ¶

2.1. Lock ¶

1. �� 트 ¶

2. �� ¶