C programming

8. Use mutex locks in pthreads to resolve the race condition in question 1. Following shows the code with "???"'s for you to fill in. un your modified code and see if you resolve the race con dition #include #include int sum; / this data is shared by the thread(s)/ void "runner(void *param);/threads call this function /* define the mutex variable */ int main(int arge, char . argv[]) if (argc != 2) { fprintf(stderr,"usage: a.out cinteger value>In): return -1; int N- atoi(argv1): if(N . n".atolargv[1])); return -1; pthread t tid[N]:/* the thread identifier pthread-attr_t attr/. set of thread attributes*/ int i; sum 0 /* create the mutex lock */ /" get the default attributes pthread attr init(&attr); /* create the thread */ for (i-0; kN; i+) pthread_create(&tid i.& attr,runner,(void *)i)