#include <stdio.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdlib.h>
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#include <pthread.h>
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#include <pthread.h>
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void *thread_function(void *arg); /* Pointer to function executed by each thread */
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void *thread_function(void *arg); /* Pointer to function executed by each thread */
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int slow = 0;
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int slow = 0;
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#define NUM 5
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#define NUM 5
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int main() {
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int main() {
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int res;
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int res;
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pthread_t threads[NUM];
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pthread_t threads[NUM];
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void *thread_result;
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void *thread_result;
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int args[NUM];
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int args[NUM];
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int i;
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int i;
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for (i = 0; i < NUM; i++)
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for (i = 0; i < NUM; i++)
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{
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{
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args[i] = i;
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args[i] = i;
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res = pthread_create(&threads[i], NULL, thread_function, (void *)&args[i]);
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res = pthread_create(&threads[i], NULL, thread_function, (void *)&args[i]);
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}
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}
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for (i = 0; i < NUM; i++)
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for (i = 0; i < NUM; i++)
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res = pthread_join(threads[i], &thread_result);
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res = pthread_join(threads[i], &thread_result);
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printf ("Done\n");
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printf ("Done\n");
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if (slow)
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if (slow)
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sleep (4);
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sleep (4);
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exit(EXIT_SUCCESS);
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exit(EXIT_SUCCESS);
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}
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}
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void *thread_function(void *arg) {
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void *thread_function(void *arg) {
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int my_number = *(int *)arg;
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int my_number = *(int *)arg;
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int rand_num;
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int rand_num;
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printf ("Print 1, thread %d\n", my_number);
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printf ("Print 1, thread %d\n", my_number);
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sleep (1);
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sleep (1);
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if (slow)
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if (slow)
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{
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{
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printf ("Print 2, thread %d\n", my_number);
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printf ("Print 2, thread %d\n", my_number);
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sleep (1);
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sleep (1);
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printf ("Print 3, thread %d\n", my_number);
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printf ("Print 3, thread %d\n", my_number);
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sleep (1);
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sleep (1);
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printf ("Print 4, thread %d\n", my_number);
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printf ("Print 4, thread %d\n", my_number);
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sleep (1);
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sleep (1);
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printf ("Print 5, thread %d\n", my_number);
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printf ("Print 5, thread %d\n", my_number);
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sleep (1);
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sleep (1);
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}
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}
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printf("Bye from %d\n", my_number);
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printf("Bye from %d\n", my_number);
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pthread_exit(NULL);
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pthread_exit(NULL);
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}
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}
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