blob: 18818706e3597462b86504fea4c8b49614ca460c (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
|
#!/usr/bin/env python3
# UPEM / System programming / Project: Memory paging simulator
# Pacien TRAN-GIRARD, Adam NAILI
from mem import Memory
from pageexception import *
class FifoPaginator:
def __init__(self, mem):
self.mem = mem
self._main_cursor = 0
def _put_main(self, page):
overwritten = self.mem.main[self._main_cursor]
self.mem.main[self._main_cursor] = page
self._main_cursor = (self._main_cursor + 1) % len(self.mem.main)
return overwritten
def load(self, page):
if not self.mem.page_in_range(page): raise PageException
if page in self.mem.main: return
if page in self.mem.virt: self.mem.remove_virt(page)
overwritten = self._put_main(page)
if overwritten is not None: self.mem.put_virt(overwritten)
|