class Paging:
def __init__(self, memory, instructions_per_frame, hdd):
self._memory = memory
self._instructions_per_frame = instructions_per_frame
self._memory_size = self._memory.size()
self._frames = []
self.generate_frames()
self._frame_manager = FrameManager(self._frames, hdd)
self._page_creator = PageCreator()
def get_amount_of_frames(self):
return len(self._frames)
def generate_frames(self):
can_create = self._memory_size % self._instructions_per_frame == 0
if can_create:
index = 0
print("Creating frames...")
for split in xrange(0, self._memory_size, self._instructions_per_frame):
self._frames.append(Frame(index, split, split + self._instructions_per_frame - 1))
index += 1
def assign_to_memory(self, pcb):
if not pcb.get_info_holder().is_holding():
self._page_creator.create(pcb, self._instructions_per_frame)
policy_result = self._frame_manager.assign_page_to_frame(pcb)
return policy_result
def get_amount_of_free_frames(self):
return len(filter(lambda f: not f.is_in_use(), self._frames))
def set_memory_manager(self, memory_manager):
self._memory_manager = memory_manager
def get_info_holder(self, program):
return PageHolder(program)