class TablePCBTest(unittest.TestCase):
def setUp(self):
self.pcb1 = PCB(1, 1, 1, 8)
self.pcb2 = PCB(2, 4, 3, 9)
self.pcb3 = PCB(3, 7, 6, 13)
self.pcb4 = PCB(4, 9, 8, 17)
def test_when_delete_a_pcb_then_pcb_is_no_longer_in_the_table(self):
self.sut = TableOfPCB()
self.sut.addPCB(self.pcb1,"aPcb")
self.sut.delete(self.pcb1)
self.assertTrue(not self.sut.contains(self.pcb1))
def test_getPS_prints_the_correct_values(self):
self.sut = TableOfPCB()
self.sut.addPCB(self.pcb1,"aPcb")
self.sut.addPCB(self.pcb2,"anotherPcb")
self.sut.addPCB(self.pcb3,"andAnother")
self.sut.addPCB(self.pcb4,"another")
self.saved_stdout = sys.stdout
self.out = StringIO()
sys.stdout = self.out
self.sut.getPS()
self.output = self.out.getvalue().strip()
self.assertEquals(self.sut.getPS(), 'Program: aPcb Pid: 1 PC: 0 Priority: 8 State: ready \nProgram: anotherPcb Pid: 2 PC: 0 Priority: 9 State: ready \nProgram: andAnother Pid: 3 PC: 0 Priority: 13 State: ready \nProgram: another Pid: 4 PC: 0 Priority: 17 State: ready \n')
class TablePCBTest(unittest.TestCase):
def setUp(self):
self.pcb1 = PCB(1, 1, 1, 8)
self.pcb2 = PCB(2, 4, 3, 9)
self.pcb3 = PCB(3, 7, 6, 13)
self.pcb4 = PCB(4, 9, 8, 17)
def test_when_delete_a_pcb_then_pcb_is_no_longer_in_the_table(self):
self.sut = TableOfPCB()
self.sut.addPCB(self.pcb1, "aPcb")
self.sut.delete(self.pcb1)
self.assertTrue(not self.sut.contains(self.pcb1))
def test_getPS_prints_the_correct_values(self):
self.sut = TableOfPCB()
self.sut.addPCB(self.pcb1, "aPcb")
self.sut.addPCB(self.pcb2, "anotherPcb")
self.sut.addPCB(self.pcb3, "andAnother")
self.sut.addPCB(self.pcb4, "another")
self.saved_stdout = sys.stdout
self.out = StringIO()
sys.stdout = self.out
self.sut.getPS()
self.output = self.out.getvalue().strip()
self.assertEquals(
self.sut.getPS(),
'Program: aPcb Pid: 1 PC: 0 Priority: 8 State: ready \nProgram: anotherPcb Pid: 2 PC: 0 Priority: 9 State: ready \nProgram: andAnother Pid: 3 PC: 0 Priority: 13 State: ready \nProgram: another Pid: 4 PC: 0 Priority: 17 State: ready \n'
)
class ProgramLoader:
def __init__(self, memory, hdd, processQueue, mmu):
"""
Constructor it requires a memory, a hard disk, a process queue and a memory management unity
"""
self.memory = memory
self.mmu = mmu
self.hdd = hdd
self.pids = 0
self.processQueue = processQueue
self.pcbTable = TableOfPCB()
def manual(self, programName):
"""
@param programName: the name of a program
@return the manual of a program called programName
"""
return self.hdd.getProgram(programName)
def in_disk(self, program_name):
"""
@param program_name: the program's name to looking for
@return it tells if a program_name is in disk
"""
return program_name in self.hdd.programs
def loadProcess(self, program, priority=0, args=[]):
"""
@note: this method load a program into the ram
@param program: the next program to load
priority: the priority of the program
args: the program will be loaded with this args
@return: the program id
"""
self.myProgram = self.hdd.getProgram(program)
self.myProgram.initializePreValues(args)
self.scope = self.mmu.getMemoryScope(self.myProgram)
self.pages = self.scope.getListInstructionPages()
self.dataScope = self.scope.getListDataPages()
self.miPCB = PCB(self.getNextId(), self.pages, self.myProgram.size(),
priority, self.mmu.getFrameSize(), self.dataScope)
self.instructions = self.myProgram.getInstructions()
current = 0
for slipping in xrange(self.mmu.getFrameSize()):
if current >= len(self.instructions): break
self.memory.putDir(
self.mmu.fromPageToAbsolutePosition(
self.pages[0].getPageNumber()) + slipping,
self.instructions[current])
current = current + 1
self.pages[0].changeMemoryFlag()
self.miPCB.toReady()
self.processQueue.put(self.miPCB)
self.pcbTable.addPCB(self.miPCB, self.myProgram.getName())
return self.pids
def getPcbTable(self):
return self.pcbTable
def getNextId(self):
self.pids = self.pids + 1
return self.pids
def storeNeededPage(self, pcb):
'''
@invariant: the pcb's pc is in the beginning of a page not in memory RAM.
'''
currentValue = pcb.getCurrentLogicPage() * self.mmu.getFrameSize()
programName = self.pcbTable.getProgramName(pcb.getPid())
instructions = self.hdd.getProgram(programName).getInstructions()
for slipping in xrange(self.mmu.getFrameSize()):
if currentValue >= len(instructions): break
self.memory.putDir(
self.mmu.fromPageToAbsolutePosition(
pcb.getCurrentPage().getPageNumber()) + slipping,
instructions[currentValue])
currentValue = currentValue + 1
pcb.getCurrentPage().changeMemoryFlag()
class ProgramLoader:
def __init__(self, memory,hdd,processQueue,mmu):
"""
Constructor it requires a memory, a hard disk, a process queue and a memory management unity
"""
self.memory = memory
self.mmu = mmu
self.hdd = hdd
self.pids = 0
self.processQueue = processQueue
self.pcbTable = TableOfPCB()
def manual(self, programName):
"""
@param programName: the name of a program
@return the manual of a program called programName
"""
return self.hdd.getProgram(programName)
def in_disk(self, program_name):
"""
@param program_name: the program's name to looking for
@return it tells if a program_name is in disk
"""
return program_name in self.hdd.programs
def loadProcess(self, program, priority=0,args=[]):
"""
@note: this method load a program into the ram
@param program: the next program to load
priority: the priority of the program
args: the program will be loaded with this args
@return: the program id
"""
self.myProgram = self.hdd.getProgram(program)
self.myProgram.initializePreValues(args)
self.scope = self.mmu.getMemoryScope(self.myProgram)
self.pages = self.scope.getListInstructionPages()
self.dataScope = self.scope.getListDataPages()
self.miPCB = PCB(self.getNextId(),self.pages,self.myProgram.size(), priority,self.mmu.getFrameSize(),self.dataScope)
self.instructions = self.myProgram.getInstructions()
current = 0
for slipping in xrange(self.mmu.getFrameSize()):
if current >= len(self.instructions): break
self.memory.putDir(self.mmu.fromPageToAbsolutePosition(self.pages[0].getPageNumber()) + slipping, self.instructions[current])
current = current+1
self.pages[0].changeMemoryFlag()
self.miPCB.toReady()
self.processQueue.put(self.miPCB)
self.pcbTable.addPCB(self.miPCB,self.myProgram.getName())
return self.pids
def getPcbTable(self):
return self.pcbTable
def getNextId(self):
self.pids = self.pids + 1
return self.pids
def storeNeededPage(self,pcb):
'''
@invariant: the pcb's pc is in the beginning of a page not in memory RAM.
'''
currentValue = pcb.getCurrentLogicPage() * self.mmu.getFrameSize()
programName = self.pcbTable.getProgramName(pcb.getPid())
instructions = self.hdd.getProgram(programName).getInstructions()
for slipping in xrange(self.mmu.getFrameSize()):
if currentValue >= len(instructions): break
self.memory.putDir(self.mmu.fromPageToAbsolutePosition(pcb.getCurrentPage().getPageNumber()) + slipping, instructions[currentValue])
currentValue = currentValue + 1
pcb.getCurrentPage().changeMemoryFlag()