bool swap_store (struct frame *frame)
{
//printf ("[Debug] swap_store ()! free_list : %s, slot_cnt : %d, max_slot_cnt : %d\n", list_empty (&free_list) ? "empty" : "something", slot_cnt, max_slot_cnt);
struct swap_slot *slot;
if (list_empty (&free_list))
{
if (slot_cnt >= max_slot_cnt)
return false;
slot = malloc (sizeof(struct swap_slot));
slot->sec_no_start = slot_cnt * SECTORS_PER_SLOT;
++slot_cnt;
}
else
{
slot = list_entry (list_pop_back (&free_list), struct swap_slot, elem);
}
//printf ("[Debug] kiki\n");
slot->suppage = frame->suppage;
slot->owner = frame->owner;
swap_write (slot->sec_no_start, frame->kpage, PGSIZE);
list_push_back (&slot_list, &slot->elem);
//printf ("[Debug] success of swap_store ()!\n");
return true;
}
void unloadAPage(){
int pp_id = rand() % allocated_pages_capacity;
page_virt pv = allocated_pages[pp_id];
page_phys pp = page_table[pv].pp;
swap_write(pv, pp);
page_table[pv].status = SWAPPED;
allocated_pages[pp_id] = INVALID;
pm_freePage(pp);
mmu_invalidatePage(pv);
allocated_pages_free = pp_id;
}