/* set_task: reads messages from the user interface, and
sets the clock, or exits the program */
void * set_thread(void *unused)
{
/* message array */
char message[SI_UI_MAX_MESSAGE_SIZE];
/* time read from user interface */
int hours, minutes, seconds;
/* set GUI size */
si_ui_set_size(400, 200);
while(1)
{
/* read a message */
si_ui_receive(message);
/* check if it is a set message */
if (strncmp(message, "set", 3) == 0)
{
time_from_set_message(message, &hours, &minutes, &seconds);
if (time_ok(hours, minutes, seconds))
{
clock_set_time(hours, minutes, seconds);
}
else
{
si_ui_show_error("Illegal value for hours, minutes or seconds");
}
}
else if (strncmp(message, "alarm", 5) == 0)
{
time_from_alarm_message(message, &hours, &minutes, &seconds);
if (time_ok(hours, minutes, seconds))
{
clock_set_alarm(hours, minutes, seconds);
}
else
{
si_ui_show_error("Illegal value for hours, minutes or seconds");
}
}
else if (strcmp(message, "reset") == 0)
{
clock_reset_alarm();
}
/* check if it is an exit message */
else if (strcmp(message, "exit") == 0)
{
exit(0);
}
/* not a legal message */
else
{
si_ui_show_error("unexpected message type");
}
}
}
// This is the final process called by main()
// It is responsible for:
// * Receiving and executing commands from the java GUI
// * Killing off all processes when exiting the application
void uicommand_process(void) {
int i;
int current_person_id = 0;
char message[SI_UI_MAX_MESSAGE_SIZE];
int pid;
while(1) {
// Read a message from the GUI
si_ui_receive(message);
if(!strcmp(message, "new")) {
// TODO:
// * Check that we don't create too many persons
// * fork and create a new person process (and
// record the new pid in person_pid[])
if (current_person_id + 1 < MAX_N_PERSONS) {
pid = fork();
current_person_id++;
if (!pid) {
person_process(current_person_id);
} else {
person_pid[current_person_id] = pid;
}
}
} else if (!strncmp(message, "test", 4)) {
switch ((int) (message[5] - '0')) {
case 0:
for (i=0; i<MAX_N_PERSONS; i++) {
if (current_person_id + 1 < MAX_N_PERSONS) {
pid = fork();
current_person_id++;
if (!pid) {
person_process(current_person_id);
} else {
person_pid[current_person_id] = pid;
}
}
}
}
} else if(!strcmp(message, "exit")) {
// The code below sends the SIGINT signal to
// all processes involved in this application
// except for the uicommand process itself
// (which is exited by calling exit())
kill(uidraw_pid, SIGINT);
kill(lift_pid, SIGINT);
kill(liftmove_pid, SIGINT);
kill(guard_pid, SIGINT);
for(i=0; i < MAX_N_PERSONS; i++) {
if(person_pid[i] > 0) {
kill(person_pid[i], SIGINT);
}
}
exit(0);
}
}
}
/*
There shall be one task, called user_task, which receives commands from the graphical user interface. This task shall create new person tasks. A new person task shall be created when the text string new is received. The task user_task shall also contain functionality for termination of the program. The program shall be terminated when the text string exit is received.
*/
void user_task(void)
{
/* set size of GUI window */
si_ui_set_size(670, 700);
int n_persons = 0;
/* message array */
char message[SI_UI_MAX_MESSAGE_SIZE];
while(1)
{
/* read a message */
si_ui_receive(message);
/* check if it is a set time message */
if (strncmp(message, "new", 3) == 0)
{
printf("blaba!!!!\n");
if (n_persons == MAX_N_PERSONS)
{
si_ui_show_error("Failure to comply: Overpopulation!");
} else {
int id = n_persons++;
si_task_create(passenger_task, &Passenger_Stack[id][STACK_SIZE-1], 17);
/* send id message to created task */
si_message_send((char *) &id, sizeof(int), id_to_task_id(id));
}
}
/* check if it is an exit message */
else if (strcmp(message, "exit") == 0)
{
exit(0);
}
/* not a legal message */
else
{
si_ui_show_error("unexpected message type");
}
}
}
/* exit_task: used for closing the program */
void exit_task(void)
{
/* message array */
char message[SI_UI_MAX_MESSAGE_SIZE];
while(1)
{
/* read a message */
si_ui_receive(message);
/* check if it is an exit message */
if (strcmp(message, "exit") == 0)
{
exit(0);
}
/* not a legal message */
else
{
si_ui_show_error("unexpected message type");
}
}
}
/*
There shall be one task, called user_task, which receives commands from the graphical user interface. This task shall create new person tasks. A new person task shall be created when the text string new is received. The task user_task shall also contain functionality for termination of the program. The program shall be terminated when the text string exit is received.
*/
void user_task(void)//TODO
{
/* set size of GUI window */
si_ui_set_size(670, 700);
int n_persons = 0;
/* message array */
char message[SI_UI_MAX_MESSAGE_SIZE];
while(1)
{
/* read a message */
si_ui_receive(message);
/* check if it is a set time message */
if (strncmp(message, "new", 3) == 0)
{
/*printf("Spawning...\n");*/
if (n_persons == MAX_N_PERSONS)
{
si_ui_show_error("Failure to comply: Overpopulation!");
} else {
int id = n_persons++;
create_passenger(id, 17);
}
}
/* check if it is an exit message */
else if (strcmp(message, "exit") == 0)
{
exit(0);
}
/* not a legal message */
else
{
si_ui_show_error("unexpected message type");
}
}
}
/* set_task: reads messages from the user interface... */
void set_task(void)
{
/* message array */
char message[SI_UI_MAX_MESSAGE_SIZE];
/* time read from user interface */
int hours = 0, minutes = 0, seconds = 0;
/* set GUI size */
si_ui_set_size(400, 200);
while(1)
{
/* read a message */
si_ui_receive(message);
/* check if it is a set message */
if (strncmp(message, "set:", 4) == 0)
{
time_from_set_message(message, &hours, &minutes, &seconds);
if (time_ok(hours, minutes, seconds))
{
set_time(hours, minutes, seconds);
}
else
{
si_ui_show_error("Illegal value for hours, minutes or seconds");
}
}
/* check if it is an alarm message */
else if (strncmp(message, "alarm:", 6) == 0)
{
time_from_alarm_message(message, &hours, &minutes, &seconds);
if (time_ok(hours, minutes, seconds))
{
set_alarm(hours, minutes, seconds);
display_alarm_time(hours,minutes,seconds);
}
else
{
si_ui_show_error("Illegal value for hours, minutes or seconds");
}
}
/* check if it is an reset message */
else if (strncmp(message, "reset", 5) == 0)
{
erase_alarm_time();
erase_alarm_text();
reset_alarm();
}
/* check if it is an exit message */
else if (strcmp(message, "exit") == 0)
{
exit(0);
}
/* not a legal message */
else
{
si_ui_show_error("unexpected message type");
}
}
}