void update_score(Leaderboard *leaderboard, char *username, bool win)
{
Score *score;
if (contains_user(leaderboard, username)) {
score = get_score(leaderboard, username);
} else {
score = add_user(leaderboard, username);
}
score->games_played++;
score->games_won += win;
sort_leaderboard(leaderboard);
}
/* watch for users signing ON and OFF */
void *watchuser(void *args) {
struct userarg *userargs;
struct userelement *users;
pthread_mutex_t lock;
struct utmpx *up;
int contains;
time_t last_check;
struct userelement *tmp;
/* get the current time */
time(&last_check);
while(1) {
userargs = (struct userarg *)args;
users = (struct userelement *)userargs->users;
lock = (pthread_mutex_t)userargs->lock;
setutxent();
while(up = getutxent()) {
/* if we have a user process */
if(up->ut_type == USER_PROCESS) {
/* check if the user is a watched user */
pthread_mutex_lock(&lock);
contains = contains_user(users, up->ut_user);
pthread_mutex_unlock(&lock);
/* if the user is watched and has logged on since we last checked, print */
if(contains == 1 && (int)up->ut_tv.tv_sec > (int)last_check) {
printf("\n%s has logged on %s from %s\n", up->ut_user, up->ut_line, up->ut_host);
/* Mark the user as having logged in */
pthread_mutex_lock(&lock);
users = login(users, up->ut_user);
pthread_mutex_unlock(&lock);
}
if (contains == 1) {
/* If the user is in the loop they are logged on. Mark as checked regardless of when they logged on */
pthread_mutex_lock(&lock);
users = check(users, up->ut_user);
pthread_mutex_unlock(&lock);
}
}
}
/* Check for users that have logged off */
pthread_mutex_lock(&lock);
tmp = users;
while(tmp != NULL) {
/* If we didn't see the user logged in this time but they had logged on before consider the user logged off */
if(tmp->checked == 0 && tmp->logged_on) {
/* Mark the user as logged off, and print (in the logoff function) */
users = logoff(users, tmp->username);
}
tmp = tmp->next;
}
/* Uncheck all users for the next loop */
users = uncheckAll(users);
pthread_mutex_unlock(&lock);
/* update when we last checked */
time(&last_check);
sleep(10);
}
}