static void sleep_tick_adjust(uint32_t ms)
{
uint32_t diff;
diff = rt_tick_from_millisecond(ms);
rt_tick_set(rt_tick_get() + diff);
{
struct rt_thread *thread;
/* check time slice */
thread = rt_thread_self();
if (thread->remaining_tick <= diff)
{
/* change to initialized tick */
thread->remaining_tick = thread->init_tick;
/* yield */
rt_thread_yield();
}
else
{
thread->remaining_tick -= diff;
}
/* check timer */
rt_timer_check();
}
}
/// Pass control to next thread that is in state READY
osStatus osThreadYield(void)
{
rt_err_t result;
result = rt_thread_yield();
if (result == RT_EOK)
return osOK;
else
return osErrorOS;
}
/* 线程2入口 */
static void thread2_entry(void* parameter)
{
rt_uint32_t count = 0;
while (1) {
/* 打印线程2的输出 */
rt_kprintf("thread2: count = %d\n", count ++);
/* 执行yield后应该切换到thread1执行 */
rt_thread_yield();
}
}
/**
* This function will notify kernel there is one tick passed. Normally,
* this function is invoked by clock ISR.
*/
void rt_tick_increase(void)
{
struct rt_thread *thread;
/* increase the global tick */
++ rt_tick;
/* check time slice */
thread = rt_thread_self();
-- thread->remaining_tick;
if (thread->remaining_tick == 0)
{
/* change to initialized tick */
thread->remaining_tick = thread->init_tick;
/* yield */
rt_thread_yield();
}
/* check timer */
rt_timer_check();
}
int sched_yield(void)
{
rt_thread_yield();
return 0;
}