__LINK_C error_t sched_cancel_task(task_t task)
{
check_structs_are_valid();
error_t retVal;
start_atomic();
uint8_t id = get_task_id(task);
if(id == NO_TASK)
retVal = EINVAL;
else if(!is_scheduled(id))
retVal = EALREADY;
else
{
if (NG(m_info)[id].prev == NO_TASK)
NG(m_head)[NG(m_info)[id].priority] = NG(m_info)[id].next;
else
NG(m_info)[NG(m_info)[id].prev].next = NG(m_info)[id].next;
if (NG(m_info)[id].next == NO_TASK)
NG(m_tail)[NG(m_info)[id].priority] = NG(m_info)[id].prev;
else
NG(m_info)[NG(m_info)[id].next].prev = NG(m_info)[id].prev;
NG(m_info)[id].prev = NO_TASK;
NG(m_info)[id].next = NO_TASK;
NG(m_info)[id].priority = NOT_SCHEDULED;
check_structs_are_valid();
retVal = SUCCESS;
}
end_atomic();
return retVal;
}
__LINK_C bool sched_is_scheduled(task_t task)
{
//INT_Disable();
start_atomic();
uint8_t task_id = get_task_id(task);
bool retVal = false;
if(task_id != NO_TASK)
retVal = is_scheduled(task_id);
//INT_Enable();
end_atomic();
return retVal;
}
static i32 sched_timer_if_new(struct sw_timer *head)
{
i32 rv = 0;
struct hwt_info *hwt = head->hwt_obj;
if(true == is_scheduled(head))
goto sched_timer_if_new_exit;
/* If HW timer running, then update it othewise start it */
rv = hwt_is_running(hwt)?
hwt_update(hwt, &head->hwt_expires) :
hwt_start(hwt, &head->hwt_expires);
if(0 == rv)
set_scheduled(head, true);
sched_timer_if_new_exit:
return rv;
}
__LINK_C error_t sched_post_task_prio(task_t task, uint8_t priority)
{
error_t retVal;
start_atomic();
check_structs_are_valid();
uint8_t task_id = get_task_id(task);
if(task_id == NO_TASK)
retVal = EINVAL;
else if(priority > MIN_PRIORITY || priority < MAX_PRIORITY)
retVal = ESIZE;
else if (is_scheduled(task_id))
retVal = EALREADY;
else
{
if(NG(m_head)[priority] == NO_TASK)
{
NG(m_head)[priority] = task_id;
NG(m_tail)[priority] = task_id;
}
else
{
NG(m_info)[NG(m_tail)[priority]].next = task_id;
NG(m_info)[task_id].prev = NG(m_tail)[priority];
NG(m_tail)[priority] = task_id;
}
NG(m_info)[task_id].priority = priority;
//if our priority is higher than the currently known maximum priority
if((priority < NG(current_priority)))
NG(current_priority) = priority;
check_structs_are_valid();
retVal = SUCCESS;
}
end_atomic();
check_structs_are_valid();
return retVal;
}
