#include "idlethread.h"

#include "../arch/core.h"
#include "../arch/lapic.h"
#include "../debug/output.h"
#include "../interrupt/guard.h"
#include "../thread/scheduler.h"

void IdleThread::action() {
	while (true) {
		Core::Interrupt::disable();
		if (Guard::unsafeConstAccess()
				.scheduler.isEmpty()) {	 // XXX: not a fan ...
			// To save energy we can disable the timer on a core as soon as no
			// clock needs to be managed. This function is called from the idle
			// loop.
			bool can_sleep =
				!Guard::unsafeConstAccess().bellringer.bellPending();
			if (can_sleep) {
				LAPIC::Timer::setMasked(true);
			}
			Core::idle();
			// We woke up. Start ticking again
			LAPIC::Timer::setMasked(false);
		} else {
			Core::Interrupt::enable();
			Guarded g = Guard::enter();
			g.vault().scheduler.resume();
		}
	}
}