public void Create()
{
var ram = new Ram(1024, 256);
Assert.That(ram.Size, Is.EqualTo(1024));
Assert.That(ram.FrameSize, Is.EqualTo(256));
Assert.That(ram.FrameCount, Is.EqualTo(4));
}
public PageStream(Ram ram, PageInfo pageSet)
{
if (ram == null)
throw new ArgumentNullException(nameof(ram));
if (pageSet == null)
throw new ArgumentNullException(nameof(pageSet));
_ram = ram;
_pageSet = pageSet;
_page = pageSet.Pages.FirstOrDefault();
}
public void ReadFromStream()
{
var buffer = new byte[] {1, 2, 3, 4, 5, 6};
const uint frameSize = 3;
var ram = new Ram(buffer, frameSize);
var s = ram.GetStream(0);
Assert.That(s.Length, Is.EqualTo(frameSize));
Assert.That(s.ToArray(), Is.EquivalentTo(new[] {1, 2, 3}));
var s2 = ram.GetStream(1);
Assert.That(s2.Length, Is.EqualTo(frameSize));
Assert.That(s2.ToArray(), Is.EquivalentTo(new[] { 4, 5, 6 }));
}
public Cpu(Ram ram)
{
Ram = ram;
ReadyQueue = new ReadyQueue(PriorityCount);
DeviceReadQueue = new DeviceQueue();
DeviceWriteQueue = new DeviceQueue();
Locks = Enumerable.Range(1, LockCount).Select(x => (DeviceId)(x + Devices.Locks)).Select(x => new Lock(x)).ToArray();
Events = Enumerable.Range(1, EventCount).Select(x => (DeviceId)(x + Devices.Events)).Select(x => new Event(x)).ToArray();
SleepTimer = new CpuSleepTimer();
_processes = new Dictionary<uint, ProcessContextBlock>();
_operations = OpCodeMetaInformationBuilder.GetMetaInformation().ToDictionary(x => x.OpCode, OpCodeMetaInformationBuilder.BuildOperation);
IdleProcess = new ProcessContextBlock { Id = 1, };
InputDevice = new TerminalInputDevice();
}
public void Free()
{
var ram = new Ram(2, 1);
var pcb = new ProcessContextBlock { Id = 1 };
var frame = ram.Allocate(pcb);
Assert.That(frame, Is.Not.Null);
frame = ram.Allocate(pcb);
Assert.That(frame, Is.Not.Null);
ram.Free(frame);
frame = ram.Allocate(pcb);
Assert.That(frame, Is.Not.Null);
}
public void CreateShared()
{
var ram = new Ram(1024, 256);
var offset = ram.AllocateShared(512);
Assert.That(offset, Is.EqualTo(0));
var pcb = new ProcessContextBlock {Id = 10};
var p1 = ram.Allocate(pcb);
var p2 = ram.Allocate(pcb);
var p1Offset = ram.ToPhysicalAddress(10, p1.VirtualAddress);
var p2Offset = ram.ToPhysicalAddress(10, p2.VirtualAddress);
Assert.That(p1Offset, Is.GreaterThan(offset));
Assert.That(p2Offset, Is.GreaterThan(offset));
Assert.That(p2Offset, Is.GreaterThan(p1Offset));
}
public void Allocate()
{
var ram = new Ram(2, 1);
var pcb = new ProcessContextBlock { Id = 1 };
var page = ram.Allocate(pcb);
Assert.That(page, Is.Not.Null);
Assert.That(page.PageNumber, Is.Not.EqualTo(0));
page = ram.Allocate(pcb);
Assert.That(page, Is.Not.Null);
Assert.That(page.PageNumber, Is.Not.EqualTo(0));
page = ram.Allocate(pcb);
Assert.That(page, Is.Null);
}
public void Write()
{
var buffer = new byte[] {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 };
const uint frameSize = 4;
var ram = new Ram(buffer, frameSize);
var pageSet = new PageInfo();
var pcb = new ProcessContextBlock {Id = 1};
ram.Allocate(pcb);
pageSet.Append(ram.Allocate(pcb));
pageSet.Append(ram.Allocate(pcb));
var pageStream = new PageStream(ram, pageSet);
Assert.That(pageStream.Length, Is.EqualTo(8));
var b = new byte[] { 91, 92, 93, 94, };
pageStream.Position = 2;
pageStream.Write(b, 0, 4);
Assert.That(buffer, Is.EquivalentTo(new[] { 1, 2, 3, 4, 5, 6, 91, 92, 93, 94, 11, 12, }));
}
public void Read()
{
var buffer = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 };
const uint frameSize = 4;
var ram = new Ram(buffer, frameSize);
var pageSet = new PageInfo();
var pcb = new ProcessContextBlock {Id = 1};
ram.Allocate(pcb);
pageSet.Append(ram.Allocate(pcb));
pageSet.Append(ram.Allocate(pcb));
var pageStream = new PageStream(ram, pageSet);
Assert.That(pageStream.Length, Is.EqualTo(8));
var b = new byte[6];
pageStream.Read(b, 0, 6);
Assert.That(pageStream.Position, Is.EqualTo(6));
Assert.That(b, Is.EquivalentTo(new[] { 5, 6, 7, 8, 9, 10 }));
}
public void SetUp()
{
const uint pId = 10;
var ram = new Ram(_ram, 16);
_sharedOffset = (int) ram.AllocateShared(256);
_cpu = new Cpu(ram);
_cpu.InputDevice = new InputDevice();
var p = CreateProcess(pId);
_cpu.CurrentProcess = p;
_cpu.CurrentProcess.Registers[Register.H] = p.GlobalData.Offset;
var heap = _cpu.Ram.Allocate(_cpu.IdleProcess);
_heapOffset = (int) _cpu.Ram.ToPhysicalAddress(_cpu.IdleProcess.Id, heap.VirtualAddress);
_cpu.Ram.Free(heap);
}
public void WriteToStream()
{
var buffer = new byte[] {1, 2, 3, 4, 5, 6};
const uint frameSize = 3;
var ram = new Ram(buffer, frameSize);
var s = ram.GetStream(0);
s.WriteByte(99);
Assert.That(s.ToArray(), Is.EquivalentTo(new[] {99, 2, 3}));
}