给我一个能直观看出死锁了的c语言代码

以下是一个简单的 C 语言程序，演示了如何出现死锁：

#include <stdio.h>
#include <pthread.h>

pthread_mutex_t mutex1 = PTHREAD_MUTEX_INITIALIZER;
pthread_mutex_t mutex2 = PTHREAD_MUTEX_INITIALIZER;

void* func1(void* arg) {
    pthread_mutex_lock(&mutex1);
    printf("Thread 1 acquired mutex1\n");
    sleep(1);
    pthread_mutex_lock(&mutex2);
    printf("Thread 1 acquired mutex2\n");
    pthread_mutex_unlock(&mutex2);
    pthread_mutex_unlock(&mutex1);
    return NULL;
}

void* func2(void* arg) {
    pthread_mutex_lock(&mutex2);
    printf("Thread 2 acquired mutex2\n");
    sleep(1);
    pthread_mutex_lock(&mutex1);
    printf("Thread 2 acquired mutex1\n");
    pthread_mutex_unlock(&mutex1);
    pthread_mutex_unlock(&mutex2);
    return NULL;
}

int main() {
    pthread_t thread1, thread2;
    pthread_create(&thread1, NULL, func1, NULL);
    pthread_create(&thread2, NULL, func2, NULL);
    pthread_join(thread1, NULL);
    pthread_join(thread2, NULL);
    return 0;
}

该程序启动两个线程，每个线程都需要锁定两个互斥锁，但它们的锁定顺序相反。这样，当第一个线程锁定 mutex1 并等待 mutex2，而第二个线程锁定 mutex2 并等待 mutex1 时，它们就会陷入死锁状态。如果您在运行此程序时观察到它永远不会退出，请检查它是否陷入了死锁状态。