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 uint Allocate(uint size) { var page = new PageInfo(); while (size > Ram.FrameSize) { size -= Ram.FrameSize; page.Append(Ram.Allocate(CurrentProcess)); } page.Append(Ram.Allocate(CurrentProcess)); CurrentProcess.PageTable.Add(page); return(page.Offset); }
public Stream AllocateCodeBlock(ProcessContextBlock pcb, uint length) { var page = new PageInfo(); while (length > Ram.FrameSize) { length -= Ram.FrameSize; page.Append(Ram.Allocate(pcb)); } page.Append(Ram.Allocate(pcb)); pcb.Code = page; return(GetMemoryStream(page)); }
public void Run(ProcessContextBlock block) { if (block == null) { throw new ArgumentNullException(nameof(block)); } block.Stack.Append(Ram.Allocate(block)); block.GlobalData.Append(Ram.Allocate(block)); block.Registers[Register.G] = block.Id; block.Registers[Register.H] = block.GlobalData.Offset; _processes.Add(block.Id, block); ReadyQueue.Enqueue(block); block.IsRunning = true; }