/* alarm_task: raises the alarm */
void alarm_task(void)
{
/* local copy of Clock.alarm_enabled */
int alarm_enabled = 1;
while(1)
{
/* wait for alarm time */
si_sem_wait(&Clock.start_alarm);
/* update local copy of Clock.alarm_enabled */
si_sem_wait(&Clock.mutex);
alarm_enabled = Clock.alarm_enabled;
si_sem_signal(&Clock.mutex);
while(alarm_enabled)
{
/* trigger the alarm */
display_alarm_text();
/* wait one second */
si_wait_n_ms(10000);
/* update local copy of Clock.alarm_enabled */
si_sem_wait(&Clock.mutex);
alarm_enabled = Clock.alarm_enabled;
si_sem_signal(&Clock.mutex);
}
}
}
/* increment_time: increments the current time with
one second */
void increment_time(void)
{
/* reserve clock variables */
si_sem_wait(&Clock.mutex);
/* increment time */
Clock.time.seconds++;
if (Clock.time.seconds > 59)
{
Clock.time.seconds = 0;
Clock.time.minutes++;
if (Clock.time.minutes > 59)
{
Clock.time.minutes = 0;
Clock.time.hours++;
if (Clock.time.hours > 23)
{
Clock.time.hours = 0;
}
}
}
/* release clock variables */
si_sem_signal(&Clock.mutex);
}
/* increment_time: increments the current time with
one second */
void increment_time(void)
{
/* reserve clock variables */
si_sem_wait(&Mutex);
/* increment time */
Seconds++;
if (Seconds > 59)
{
Seconds = 0;
Minutes++;
if (Minutes > 59)
{
Minutes = 0;
Hours++;
if (Hours > 11)
{
Hours = 0;
}
}
}
/* release clock variables */
si_sem_signal(&Mutex);
}
/* get_number: gets the value of Number, together with the
value of Even_Number, which indicates if Number is even or odd */
void get_number(
int *number_value, int *even_number_value)
{
si_sem_wait(&Mutex);
*number_value = Number;
*even_number_value = Even_Number;
si_sem_signal(&Mutex);
}
void check_alarm_time(void)
{
si_sem_wait(&Clock.mutex);
if (Clock.time.seconds >= Clock.alarm_time.seconds && Clock.time.minutes >= Clock.alarm_time.minutes && Clock.time.hours >= Clock.alarm_time.hours && Clock.alarm_enabled == 1)
{
si_sem_signal(&Clock.start_alarm);
}
si_sem_signal(&Clock.mutex);
}
/* The shall be one task for each person. All person tasks shall be implemented by the same C function, called passenger_task. */
void passenger_task(void)
{
//printf("blaba\n");
int id;
int length;
int send_task_id;
int current;
int from;
int to;
/* receive id */
si_message_receive((char *) &id, &length, &send_task_id);
current = random_level();
while (1)
{
from = current;
to = random_level();
si_sem_wait(&mainlift->mutex);
enter_floor(mainlift,id, current);//spawna
si_sem_signal(&mainlift->mutex);
printf("Passenger %d starting journey from %d to %d.\n", id, from, to);
lift_travel(mainlift, id, from, to);//res
current = to;
printf("Passenger %d arrived at %d.\n", id, current);
si_sem_wait(&mainlift->mutex);
leave_floor(mainlift, id, current);//ta bort från våning
si_sem_signal(&mainlift->mutex);
si_wait_n_ms(TIME_TO_NEW_JOURNEY);
}
}
/* clock_set_time: set current time to hours, minutes and seconds */
void clock_set_time(int hours, int minutes, int seconds)
{
si_sem_wait(&Clock.mutex);
Clock.time.hours = hours;
Clock.time.minutes = minutes;
Clock.time.seconds = seconds;
si_sem_signal(&Clock.mutex);
}
/* clock_reset_alarm: */
void clock_reset_alarm(void)
{
si_sem_wait(&Clock.mutex);
Clock.alarm_enabled = 0;
erase_alarm_time();
erase_alarm_text();
si_sem_signal(&Clock.mutex);
}
/* get_time: read time from common clock variables */
void get_time(int *hours, int *minutes, int *seconds)
{
/* reserve clock variables */
si_sem_wait(&Clock.mutex);
/* read values */
*hours = Clock.time.hours;
*minutes = Clock.time.minutes;
*seconds = Clock.time.seconds;
/* release clock variables */
si_sem_signal(&Clock.mutex);
}
/* get_time: read time from common clock variables */
void get_time(int *hours, int *minutes, int *seconds)
{
/* reserve clock variables */
si_sem_wait(&Mutex);
/* read values */
*hours = Hours;
*minutes = Minutes;
*seconds = Seconds;
/* release clock variables */
si_sem_signal(&Mutex);
}
/* set_time: set time to hours, minutes and seconds */
void set_time(int hours, int minutes, int seconds)
{
/* reserve clock variables */
si_sem_wait(&Mutex);
/* assign values */
Hours = hours;
Minutes = minutes;
Seconds = seconds;
/* release clock variables */
si_sem_signal(&Mutex);
}
/* clock_set_alarm: set current time to hours, minutes and seconds */
void clock_set_alarm(int hours, int minutes, int seconds)
{
si_sem_wait(&Clock.mutex);
Clock.alarm_time.hours = hours;
Clock.alarm_time.minutes = minutes;
Clock.alarm_time.seconds = seconds;
Clock.alarm_enabled = 1;
display_alarm_time(hours, minutes, seconds);
si_sem_signal(&Clock.mutex);
}
/* set_number: sets Number and updates Even_Number */
void set_number(int new_number)
{
si_sem_wait(&Mutex);
Number = new_number;
if (Number % 2 == 0)
{
Even_Number = 1;
}
else
{
Even_Number = 0;
}
si_sem_signal(&Mutex);
}
/* decrement_number: decrements Number with dec_value,
and updates Even_Number */
void decrement_number(int dec_value)
{
si_sem_wait(&Mutex);
Number -= dec_value;
if (Number % 2 == 0)
{
Even_Number = 1;
}
else
{
Even_Number = 0;
}
si_sem_signal(&Mutex);
}
/* increment_number: increments Number by adding
inc_value to Number, and updates Even_Number */
void increment_number(int inc_value)
{
si_sem_wait(&Mutex);
/* fig_begin number_inc_value */
Number += inc_value;
long_calculation();
/* fig_end number_inc_value */
if (Number % 2 == 0)
{
Even_Number = 1;
}
else
{
Even_Number = 0;
}
si_sem_signal(&Mutex);
}
void stop_task(void)
{
si_sem_wait(&Task_Stop_Sem);
}
