/* system timer thread entry */
static void rt_thread_timer_entry(void *parameter)
{
while (1)
{
/* take software timer semaphore */
rt_sem_take(&timer_sem, RT_WAITING_FOREVER);
/* lock scheduler */
rt_enter_critical();
/* check software timer */
rt_soft_timer_check();
/* unlock scheduler */
rt_exit_critical();
}
}
/* system timer thread entry */
static void rt_thread_timer_entry(void *parameter)
{
rt_tick_t next_timeout;
while (1)
{
/* get the next timeout tick */
next_timeout = rt_timer_list_next_timeout(rt_soft_timer_list);
if (next_timeout == RT_TICK_MAX)
{
/* no software timer exist, suspend self. */
rt_thread_suspend(rt_thread_self());
rt_schedule();
}
else
{
rt_tick_t current_tick;
/* get current tick */
current_tick = rt_tick_get();
if ((next_timeout - current_tick) < RT_TICK_MAX/2)
{
/* get the delta timeout tick */
next_timeout = next_timeout - current_tick;
rt_thread_delay_hmsm(next_timeout);
}
}
/* lock scheduler */
rt_enter_critical();
/* check software timer */
rt_soft_timer_check();
/* unlock scheduler */
rt_exit_critical();
}
}