| 1 | #include <stdio.h> |
| 2 | #include <unistd.h> |
| 3 | #include <stdlib.h> |
| 4 | #include <pthread.h> |
| 5 | |
| 6 | void *thread_function(void *arg); /* Pointer to function executed by each thread */ |
| 7 | |
| 8 | int slow = 0; |
| 9 | |
| 10 | #define NUM 5 |
| 11 | |
| 12 | int main() { |
| 13 | int res; |
| 14 | pthread_t threads[NUM]; |
| 15 | void *thread_result; |
| 16 | int args[NUM]; |
| 17 | int i; |
| 18 | |
| 19 | for (i = 0; i < NUM; i++) |
| 20 | { |
| 21 | args[i] = i; |
| 22 | res = pthread_create(&threads[i], NULL, thread_function, (void *)&args[i]); |
| 23 | } |
| 24 | |
| 25 | for (i = 0; i < NUM; i++) |
| 26 | res = pthread_join(threads[i], &thread_result); |
| 27 | |
| 28 | printf ("Done\n"); |
| 29 | |
| 30 | if (slow) |
| 31 | sleep (4); |
| 32 | |
| 33 | exit(EXIT_SUCCESS); |
| 34 | } |
| 35 | |
| 36 | void *thread_function(void *arg) { |
| 37 | int my_number = *(int *)arg; |
| 38 | int rand_num; |
| 39 | |
| 40 | printf ("Print 1, thread %d\n", my_number); |
| 41 | sleep (1); |
| 42 | |
| 43 | if (slow) |
| 44 | { |
| 45 | printf ("Print 2, thread %d\n", my_number); |
| 46 | sleep (1); |
| 47 | printf ("Print 3, thread %d\n", my_number); |
| 48 | sleep (1); |
| 49 | printf ("Print 4, thread %d\n", my_number); |
| 50 | sleep (1); |
| 51 | printf ("Print 5, thread %d\n", my_number); |
| 52 | sleep (1); |
| 53 | } |
| 54 | |
| 55 | printf("Bye from %d\n", my_number); |
| 56 | pthread_exit(NULL); |
| 57 | } |
| 58 | |