1 #include <iostream>
2 #include <stdlib.h>
3 #include <pthread.h>
4 using namespace std;
5
6 pthread_mutex_t myloack=PTHREAD_MUTEX_INITIALIZER;
7 pthread_cond_t mycond=PTHREAD_COND_INITIALIZER;
8 int n=0;
9 void *ThreadFunc(void *arg)
10 {
11 int num=(int )arg;
12 for (int i = 0; i < 10; ++i)
13 {
14 pthread_mutex_lock(&myloack);
15 while (n!=num)
16 pthread_cond_wait(&mycond,&myloack);
17
18 if (num==0)
19 cout<<"A";
20 else if(num==1)
21 cout<<"B";
22 else
23 cout<<"C"<<endl;
24 n=(n+1)%3;
25 pthread_mutex_unlock(&myloack);
26 pthread_cond_broadcast(&mycond);
27 }
28 return (void *)0;
29 }
30 int main(int argc, char const *argv[])
31 {
32 pthread_t id[3];
33 for (int i = 0; i < 3; ++i)
34 {
35 int err=pthread_create(&id[i],NULL,ThreadFunc,(void *)i);
36 if (err!=0)
37 {
38 cout<<"create err:"<<endl;
39 exit(-1);
40 }
41
42 }
43
44 for (int i = 0; i < 3; ++i)
45 {
46 int ret=pthread_join(id[i],NULL);
47 if (ret!=0)
48 {
49 cout<<"join err:"<<endl;
50 exit(-1);
51 }
52 }
53 return 0;
54 }
