python:使用GIL,线程还可能出现死锁吗? (不是多重处理)
我试图产生死锁情况,但下面的代码并没有造成死锁。
import threading
# Two resources
resource1 = threading.Lock()
resource2 = threading.Lock()
def function1():
with resource1:
print("Thread 1 acquired resource 1")
# Simulate some computation
with resource2:
print("Thread 1 acquired resource 2")
# Do something with both resources
pass
def function2():
with resource2:
print("Thread 2 acquired resource 2")
# Simulate some computation
with resource1:
print("Thread 2 acquired resource 1")
# Do something with both resources
pass
# Create two threads
thread1 = threading.Thread(target=function1)
thread2 = threading.Thread(target=function2)
# Start the threads
thread1.start()
thread2.start()
# Wait for both threads to finish
thread1.join()
thread2.join()
print("Both threads finished execution")
你的代码可以死锁(它至少在一次运行中为我做到了),但这取决于另一个线程在另一个线程的两个
with resource
语句之间执行with resource
。如果这个特定的时间没有发生,它就不会锁定。显然,如果代码有任何机会出现死锁,那么它就是糟糕的代码,但要注意到它并不那么容易。
为了确保死锁,请尝试将
time.sleep(1)
放在每个函数中的两个 with resource
语句之间。