Revision of 死锁检测测试

1 file changed, 3 insertions

deadlock.c

			@@ -1,3 +1,6 @@
	1	+	// gcc -g ./s.c -o deadlock_demo -lpthread
	2	+	// sudo valgrind --tool=helgrind ./deadlock_demo
	3	+
1	4		#include <pthread.h>
2	5		#include <stdio.h>
3	6		#include <unistd.h>

1 file changed, 50 insertions

deadlock.c(file created)

		@@ -0,0 +1,50 @@
1	+	#include <pthread.h>
2	+	#include <stdio.h>
3	+	#include <unistd.h>
4	+
5	+	pthread_mutex_t lock_a = PTHREAD_MUTEX_INITIALIZER;
6	+	pthread_mutex_t lock_b = PTHREAD_MUTEX_INITIALIZER;
7	+
8	+	int shared_data = 0;
9	+
10	+	void* thread_func1(void* arg) {
11	+	pthread_mutex_lock(&lock_a);
12	+	printf("Thread 1 acquired lock A\n");
13	+	shared_data += 1; // 写入共享数据
14	+	sleep(1);
15	+	pthread_mutex_lock(&lock_b);
16	+	printf("Thread 1 acquired lock B\n");
17	+	shared_data += 1;
18	+
19	+	pthread_mutex_unlock(&lock_b);
20	+	pthread_mutex_unlock(&lock_a);
21	+	return NULL;
22	+	}
23	+
24	+	void* thread_func2(void* arg) {
25	+	pthread_mutex_lock(&lock_b);
26	+	printf("Thread 2 acquired lock B\n");
27	+	shared_data += 1;
28	+	sleep(1);
29	+	pthread_mutex_lock(&lock_a);
30	+	printf("Thread 2 acquired lock A\n");
31	+	shared_data += 1;
32	+
33	+	pthread_mutex_unlock(&lock_a);
34	+	pthread_mutex_unlock(&lock_b);
35	+	return NULL;
36	+	}
37	+
38	+
39	+	int main() {
40	+	pthread_t t1, t2;
41	+
42	+	pthread_create(&t1, NULL, thread_func1, NULL);
43	+	pthread_create(&t2, NULL, thread_func2, NULL);
44	+
45	+	pthread_join(t1, NULL);
46	+	pthread_join(t2, NULL);
47	+
48	+	printf("Done.\n");
49	+	return 0;
50	+	}

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