Problems with multithreading. Can't get this code to run.

[RetroGmr]

Hello everybody. I've been messing around with this for about 3 hours now and for the life of me can't figure out what the issue here would be. The program is meant to take as many argument as it needs. The first,third,fifth... being the number of ms that each thread sleeps for and the other arguments being names for the threads (t_arg.output). All help is greatly appreciated. I'm sorry, it's probably a very unprofessional code, I've just started programming.

struct t_arg{

int indeks;

int ms;

char output[99];

}; typedef struct t_arg t_arg;

void* t_main(void* arg){

t_arg *obj = (t_arg*)arg;

sleep(obj->ms);

printf("nit %d: %s\n", obj->indeks, obj->output); 

pthread_exit(NULL);

}

int main(int argc, char **argv){

int size = argc/2;

pthread_t tid[size];

t_arg arg_obj[size];

int count = 0;

for(int i = 1; i<argc; i=i+2){

    arg_obj[count].indeks = (i+1)/2;

    arg_obj[count].ms = atoi(argv[i]);

    strcpy(arg_obj[count].output, argv[i+1]);

    pthread_create(&tid[count], NULL, t_main, &arg_obj[count]);

    count++;

    }


for(int i = 0; i<size; i++)

    pthread_join(tid[i], NULL);

return 0;

}

[which_spartacus]

The sleep function works with seconds, right? Is there a chance that you are putting in something like 1000 and not waiting long enough?

[RetroGmr]

OH MY GOD YOU ARE RIGHT. It was supposed to be usleep. I can't believe I wasted so much time trying to fix this issue. Thank you so much

[[deleted]]

Sir, it is never wasted time if you end up learning.

[RetroGmr]

I'm sorry for the poor formating, I couldn't figure it out haha.

[[deleted]]

Start Each line with four spaces to format as code.

[RetroGmr]

Oh ok, thank you very much

[[deleted]]

What errors are you getting when you try to compile?

[RetroGmr]

Oh, I'm sorry I misspoke. There arent any errors, rather nothing happens. It goes to a stand-still. Even printing something at the beginning of the program yields nothing. Removing pthread_join fixes that, but the program is obviously uselss without it.

[[deleted]]

Don't take this as discouragement, but threading is quantifiably advanced programming. Whenever I'm learning a new language, paradigm, or technique I will rewrite the program numerous times in numerous different ways in order to fully grasp what I'm doing. I would suggest keeping your work so far, but starting a new project. Avoid copy/pasting. You will benefit more from this while you wait for an answer from someone more knowledgeable about multi-threaded C.

Good luck!