void    update_var_all_work_done(t_multithread *multithread)
{
    int i;

    i = 0;
    while (i < multithread->max && multithread->tab[i].work_done)
        i++;
    if (i == multithread->max)
        multithread->all_work_done = 1;
}

void    signal_other_raycast_threads(int id, t_multithread *multithread)
{
    int i;

    i = -1;
    while (++i < multithread->max)
    {
        if (i != id)
        {
            printf("cond_signal to thread %i\n", i);
            pthread_mutex_lock(&multithread->tab[i].mutex);
            pthread_cond_signal(&multithread->tab[i].cond);
            pthread_mutex_unlock(&multithread->tab[i].mutex);
        }
    }
}

void    wait_or_signal(t_thread_env *e, t_multithread *multithread)
{
    int     id;

    id = e->id;
    if (multithread->all_work_done == 0)
    {
        printf("thread number %i is waiting for other threads\n", id);

        pthread_mutex_lock(&e->mutex);
        while (multithread->all_work_done == 0)
            pthread_cond_wait(&e->cond, &e->mutex);
        pthread_mutex_unlock(&e->mutex);

        printf("ENFIN ! thread number %id woke up from condwait\n", id);
    }
    else if (multithread->all_work_done)
    {
        printf("allworkdone sent by thread %i\n", id);
        copy_screenpixels(e->doom, multithread);
        signal_other_raycast_threads(id, multithread);
    }
}

void    *routine(void *arg)
{
    t_thread_env    *e;
    t_env           *doom;
    t_multithread   *multithread;

    e = (t_thread_env *)arg;
    doom = (t_env *)e->doom;
    multithread = (t_multithread *)e->multithread;

    while (!multithread->stop)
    {
        printf("new frame> thread_id = %i, e->work_done = %i\n", e->id, e->work_done);

        pthread_mutex_lock(&e->mutex);
        while (multithread->all_work_done || e->work_done)
            pthread_cond_wait(&e->cond, &e->mutex);
        pthread_mutex_unlock(&e->mutex);

        if (!e->work_done)
            do_raycast(doom, e);

        update_var_all_work_done(multithread);
        wait_or_signal(e, multithread);
    }
    return (0);
}