/*
************************************************************************************************************************
* Activate the specified timer
*
* Description: This function is called to activate the specified timer
*
* Arguments :timer_ptr is the address of this timer object
* -----
*
*
*
* Returns RAW_TIMER_STATE_INVALID: means timer is already active or timer is deleted..
* RAW_SUCCESS: means timer activate success
* Note(s) :RAW_STATE_UNKNOWN wrong task state, probally sysytem error.
*
*
************************************************************************************************************************
*/
RAW_U16 raw_timer_activate(RAW_TIMER *timer_ptr, RAW_VOID *expiration_input)
{
RAW_U16 position;
RAW_U16 mutex_ret;
#if (RAW_TIMER_FUNCTION_CHECK > 0)
if (timer_ptr == 0) {
return RAW_NULL_OBJECT;
}
if (raw_int_nesting) {
return RAW_NOT_CALLED_BY_ISR;
}
#endif
if (timer_ptr->object_type != RAW_TIMER_OBJ_TYPE) {
return RAW_ERROR_OBJECT_TYPE;
}
/*Timer state TIMER_ACTIVE TIMER_DELETED is not allowed to delete*/
if (timer_ptr->timer_state == TIMER_ACTIVE) {
return RAW_TIMER_STATE_INVALID;
}
if (timer_ptr->timer_state == TIMER_DELETED) {
return RAW_TIMER_STATE_INVALID;
}
timer_ptr->raw_timeout_param = expiration_input;
mutex_ret = raw_mutex_get(&timer_mutex, RAW_WAIT_FOREVER);
RAW_ASSERT(mutex_ret == RAW_SUCCESS);
timer_ptr->match = raw_timer_count + timer_ptr->init_count;
position = (RAW_U16)(timer_ptr->match & (TIMER_HEAD_NUMBERS - 1) );
/*Sort by remain time*/
timer_ptr->remain = timer_ptr->init_count;
/*Used by timer delete*/
timer_ptr->to_head = &timer_head[position];
timer_list_priority_insert(&timer_head[position], timer_ptr);
timer_ptr->timer_state = TIMER_ACTIVE;
raw_mutex_put(&timer_mutex);
return RAW_SUCCESS;
}
/*
************************************************************************************************************************
* Timer task
*
* Description: This function is called to start a timer task.
*
* Arguments :pa is the parameters to task.
* -----
*
*
*
* Returns
*
* Note(s) :This function is called by internal, users shoud not touch this function.
*
*
************************************************************************************************************************
*/
void timer_task(void *pa)
{
LIST *timer_head_ptr;
LIST *iter;
LIST *iter_temp;
RAW_TIMER *timer_ptr;
RAW_OS_ERROR mutex_ret;
RAW_U16 callback_ret;
/*reset the timer_sem count since it may not be 0 at this point, make it start here*/
raw_semaphore_set(&timer_sem, 0);
pa = pa;
while (1) {
/*timer task will be blocked after call this function*/
raw_semaphore_get(&timer_sem, RAW_WAIT_FOREVER);
mutex_ret = raw_mutex_get(&timer_mutex, RAW_WAIT_FOREVER);
RAW_ASSERT(mutex_ret == RAW_SUCCESS);
/*calculate which timer_head*/
raw_timer_count++;
timer_head_ptr = &timer_head;
iter = timer_head_ptr->next;
while (RAW_TRUE) {
/*if timer exits*/
if (iter != timer_head_ptr) {
/*Must use iter_temp because iter may be remove later.*/
iter_temp = iter->next;
timer_ptr = raw_list_entry(iter, RAW_TIMER, timer_list);
/*if timeout*/
if (raw_timer_count == timer_ptr->match) {
/*remove from timer list*/
timer_list_remove(timer_ptr);
/*if timer is reschedulable*/
if (timer_ptr->reschedule_ticks) {
/*Sort by remain time*/
timer_ptr->remain = timer_ptr->reschedule_ticks;
timer_ptr->match = raw_timer_count + timer_ptr->remain;
timer_ptr->to_head = &timer_head;
timer_list_priority_insert(&timer_head, timer_ptr);
}
else {
timer_ptr->timer_state = TIMER_DEACTIVE;
}
/*Any way both condition need to call registered timer function*/
/*the registered timer function should not touch any timer related API,otherwise system will be crashed*/
if (timer_ptr->raw_timeout_function) {
callback_ret = timer_ptr->raw_timeout_function(timer_ptr->raw_timeout_param);
if ((callback_ret == TIMER_CALLBACK_STOP) && (timer_ptr->timer_state != TIMER_DEACTIVE)) {
/*remove from timer list*/
timer_list_remove(timer_ptr);
timer_ptr->timer_state = TIMER_DEACTIVE;
}
}
iter = iter_temp;
}
else {
break;
}
}
/*exit because timer is not exit*/
else {
break;
}
}
raw_mutex_put(&timer_mutex);
}
}
