void *clock_alarm_thread(void *unused)
{
int delay = 500*1000*1000; //1,5s in ns - cause overflow when actually using 1,5s
/* time for next update */
struct timespec ts;
while (1) {
sem_wait(&Clock.start_alarm);
while (clock_get_alarm_status() == 1) {
/* initialise time for next update */
clock_gettime(CLOCK_MONOTONIC, &ts);
display_alarm_text();
/* compute time for next update */
ts.tv_nsec += delay;
ts.tv_sec++; // cause overflow when actually using 1,5s
if(ts.tv_nsec >= 1000*1000*1000){
ts.tv_nsec -= 1000*1000*1000;
ts.tv_sec++;
}
/* wait until time for next update */
clock_nanosleep(CLOCK_MONOTONIC, TIMER_ABSTIME, &ts, NULL);
}
}
}
/* 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);
}
}
}
/* alarm_task: alarm task */
void alarm_task(void)
{
/* infinite loop */
while (1)
{
alarm_wait();
display_alarm_text();
increment_alarm();
/* wait one second */
si_wait_n_ms(1000);
}
}
/*alarm_task: handles the alarm*/
void *alarm_thread(void *unused)
{
/* local copies of the current time */
int hours, minutes, seconds;
while(1)
{
sem_wait(&Clock.start_alarm);
display_alarm_text();
usleep(1500000);
pthread_mutex_lock(&Clock.mutex);
int alarm_enabled = Clock.alarm_enabled;
pthread_mutex_unlock(&Clock.mutex);
if(alarm_enabled)
{
sem_post(&Clock.start_alarm);
}
}
}