LinuxQuestions.org - About POSIX threads

I am learning about threads in POSIX. I can create a thread that runs a function. But my goal is to have a lot of threads that each has it's own ID-variable that it can use (this is the reason why I chosed threads, it was between threads and forks).

But now the problem is that each thread waits for the other to run. I tried to remove "pthread_join()" but then only one thread ran. Here is the code:

Code:

#include <stdio.h>

#include <stdlib.h>

#include <pthread.h>



void *t_func(void*);

pthread_mutex_t mutex1 = PTHREAD_MUTEX_INITIALIZER;



int main() {

        pthread_t th1, th2;

        int iret1, iret2;



        iret1 = pthread_create(&th1, NULL, t_func, (void*)100);

        iret2 = pthread_create(&th2, NULL, t_func, (void*)3);



        pthread_join(th1, NULL);

        pthread_join(th2, NULL);



        printf("done\n");



        exit(0);

}



void *t_func(void *tmp) {

        int n = (int)tmp;

        printf("#%d starting\n", n);

        printf("#%d ending\n", n);

}

I want the two threads to run at the same time, so the output would be:

Code:

#100 starting

#3 starting

#100 ending

#3 ending

done

As I said, now the threads run after each other (starting, ending the first, starting, ending the second). And when I removed "pthread_join" I got "starting, ending the first" and then the program stopped. The second thread didn't run.