static void
drop_flexsc_syspage(int cpu, struct flexsc_syspage *syspage) {
struct list_head *list, *next, worker_list;
struct task_struct *waiter;
flexsc_assert(smp_processor_id() == cpu);
syspage->__stat = STAT_EXIT;
INIT_LIST_HEAD(&worker_list);
list = &(syspage->worker_list);
while ((next = list->next) != list) {
list_del(next);
list_add(next, &worker_list), syspage->worker ++;
}
waiter = syspage->waiter, syspage->waiter = NULL;
list = &worker_list;
while ((next = list->next) != list) {
list_del_init(next);
wakeup_task(link_to_task(next));
}
if (waiter != NULL) {
wakeup_task(waiter);
}
}
void signal_semaphore(semaphore_t *sem)
{
int32_t newval = (int32_t) increment_atomic((volatile uint32_t*)&sem->value);
if (newval <= 0) {
wakeup_task(&sem->taskwait);
}
}
void check_timers(void)
{
readyqueues_t* readyqueue = &readyqueues[CORE_ID];
spinlock_irqsave_lock(&readyqueue->lock);
// since IRQs are disabled, get_clock_tick() won't increase here
const uint64_t current_tick = get_clock_tick();
// wakeup tasks whose deadline has expired
task_t* task;
while ((task = readyqueue->timers.first) && (task->timeout <= current_tick))
{
// pops task from timer queue, so next iteration has new first element
wakeup_task(task->id);
}
#ifdef DYNAMIC_TICKS
task = readyqueue->timers.first;
if (task) {
update_timer(task);
}
#endif
spinlock_irqsave_unlock(&readyqueue->lock);
}
int post_event (int tid, int event)
{
struct tsk * p = (struct tsk *) find_task (tid);
if (!p)
return -1;
p->event |= event;
wakeup_task (p);
return 0;
}
int task_kill_self(struct task_struct *task)
{
struct task_struct *system_killer = pid_get_task(0);
if (!system_killer)
return -EINVAL;
/*
* when a task try to kill himself, need to
* wake up system_killer process to help doing
* this
*/
kernel_debug("Kill self\n");
set_task_state(task, PROCESS_STATE_IDLE);
wakeup_task(system_killer);
sched();
return 0;
}
