// vim: set noet ts=4 sw=4:

#include "dispatcher.h"
#include "../arch/tss.h"
#include "thread.h"

#include "../arch/core.h"
#include "../debug/output.h"  // IWYU pragma: keep

Dispatcher::Dispatcher() : life(nullptr) {}

Thread *Dispatcher::active() const { return life; }
extern four_lvl_paging_t paging_tree;

void Dispatcher::go(Thread *first) {
	assert(active() == nullptr);
	setActive(first);
	mytss.sp0 = first->StackPointer.isr;
	load_cr3((void*)&paging_tree.l4);
	first->go();
}

void Dispatcher::dispatch(Thread *next) {
	Thread *current = active();
	assert(current != nullptr);
	if (current != next) {
		setActive(next);
		mytss.sp0 = next->StackPointer.isr;
		load_cr3((void*)&paging_tree.l4);
		current->resume(next);
	}
}