做网站 内容越多越好,广东哪里有网站建设,wordpress 短信认证,做美术鉴赏网站的心得Thread 1首先获取了资源A#xff0c;然后尝试获取资源B#xff0c;但此时资源B已经被Thread 2获取#xff0c;因此Thread 1会一直等待。而Thread 2也类似#xff0c;首先获取资源B#xff0c;然后尝试获取资源A#xff0c;但此时资源A已经被Thread 1获取#xff0c;因此…Thread 1首先获取了资源A然后尝试获取资源B但此时资源B已经被Thread 2获取因此Thread 1会一直等待。而Thread 2也类似首先获取资源B然后尝试获取资源A但此时资源A已经被Thread 1获取因此Thread 2也会一直等待。这样就形成了典型的死锁情况。
import threading
import time# 创建两个资源
resource_a threading.Lock()
resource_b threading.Lock()def thread1():with resource_a:print(Thread 1 acquired resource A)# 模拟一些操作time.sleep(1)print(Thread 1 is working...)# 尝试获取资源B但此时资源B被Thread 2持有导致Thread 1等待with resource_b:print(Thread 1 acquired resource B)# 模拟一些操作print(Thread 1 is working...)def thread2():with resource_b:print(Thread 2 acquired resource B)# 模拟一些操作time.sleep(1)print(Thread 2 is working...)# 尝试获取资源A但此时资源A被Thread 1持有导致Thread 2等待with resource_a:print(Thread 2 acquired resource A)# 模拟一些操作print(Thread 2 is working...)# 创建两个线程并启动
t1 threading.Thread(targetthread1)
t2 threading.Thread(targetthread2)
t1.start()
t2.start()
package mainimport (fmtsync
)func main() {var wg sync.WaitGroupch1 : make(chan bool)ch2 : make(chan bool)wg.Add(2)// Goroutine 1go func() {defer wg.Done()-ch1 // 等待 Goroutine 2 发送数据到 ch1fmt.Println(Goroutine 1 received data from Goroutine 2)// 尝试向 ch2 发送数据但 Goroutine 2 已经在等待 ch1ch2 - truefmt.Println(Goroutine 1 sent data to Goroutine 2)}()// Goroutine 2go func() {defer wg.Done()-ch2 // 等待 Goroutine 1 发送数据到 ch2fmt.Println(Goroutine 2 received data from Goroutine 1)// 尝试向 ch1 发送数据但 Goroutine 1 已经在等待 ch2ch1 - truefmt.Println(Goroutine 2 sent data to Goroutine 1)}()wg.Wait()
}
