pthread_rwlock_t lock = PTHREAD_RWLOCK_INITIALIZER;

void *downtime(){
    sleep(1);
    pthread_rwlock_wrlock(&lock);
    root_balanced = balanceTree(root);
    freeSubtree(root);
    root = root_balanced;
    root_balanced=NULL;
    pthread_rwlock_unlock(&lock);

    sleep(1);
    pthread_rwlock_wrlock(&lock);
    root_balanced = balanceTree(root);
    freeSubtree(root);
    root = root_balanced;
    root_balanced=NULL;
    pthread_rwlock_unlock(&lock);

    sleep(1);
    pthread_rwlock_wrlock(&lock);
    root_balanced = balanceTree(root);
    freeSubtree(root);
    root = root_balanced;
    root_balanced=NULL;
    pthread_rwlock_unlock(&lock);

    return NULL;
}

void* ServeClient(char *client){
    FILE *fp;
    char str[80];
    char delim[] = " ";
    int n, number = 0;

    fp = fopen(client, "r");

    while (fgets(str, sizeof(str), fp) != NULL) {
        pthread_rwlock_wrlock(&lock);

        char *ptr = strtok(str, delim);
        printf("[%s]%s", client, ptr);

        ptr = strtok(NULL, delim);

        switch (str[0])
            {
                case 'i':
                    n = number = 0;
                    while (ptr[n] != '\r' && ptr[n] != '\n') {
                        number = number * 10 + (int)ptr[n] - 48;
                        n++;
                    }

                    printf(" %d\n", number);
                    root = insertNode(root, number);
                    break;

                case 'd':
                    n = number = 0;
                    while (ptr[n] != '\r' && ptr[n] != '\n') {
                        number = number * 10 + (int)ptr[n] - 48;
                        n++;
                    }

                    printf(" %d\n", number);
                    root = deleteNode(root, number);
                    break;

                case 'c':
                    printf(" = %d\n", countNodes(root));
                    break;

                case 's':
                    printf(" = %d\n", sumSubtree(root));
                    break;
            }


        pthread_rwlock_unlock(&lock);
    }

    fclose(fp);
    return NULL;
}