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 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, }));
}
private ProcessContextBlock CreateProcess(uint pId)
{
var p = new ProcessContextBlock {
Id = pId
};
p.Stack.Append(_cpu.Ram.Allocate(p));
p.Code.Append(_cpu.Ram.Allocate(p));
p.GlobalData.Append(_cpu.Ram.Allocate(p));
return(p);
}
public void SignalEvent()
{
var pA = _cpu.CurrentProcess;
Invoke(InstructionsWithControlByte.WaitEvent, 1);
var pB = new ProcessContextBlock();
_cpu.CurrentProcess = pB;
Invoke(InstructionsWithControlByte.SignalEvent, 1);
Assert.That(_cpu.CurrentProcess, Is.EqualTo(pB));
Assert.That(_cpu.ReadyQueue, Contains.Item(pA));
Assert.That(_cpu.DeviceReadQueue, Is.Empty);
}
public void SignalEvent()
{
var pA = _cpu.CurrentProcess;
Instructions.Movi(_cpu, Register.A, 1);
Instructions.WaitEvent(_cpu, Register.A);
var pB = new ProcessContextBlock();
_cpu.CurrentProcess = pB;
Instructions.Movi(_cpu, Register.A, 1);
Instructions.SignalEvent(_cpu, Register.A);
Assert.That(_cpu.CurrentProcess, Is.EqualTo(pB));
Assert.That(_cpu.ReadyQueue, Contains.Item(pA));
Assert.That(_cpu.DeviceQueue, Is.Empty);
}
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 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 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 static uint Compile(this Cpu cpu, ProcessContextBlock pcb, string source)
{
var ms = new MemoryStream();
using (var writer = new CodeWriter(ms))
{
var assembler = new Assembler(source);
foreach (var i in assembler.Assemble())
{
writer.Write(i);
}
writer.Close();
var codeBlock = cpu.AllocateCodeBlock(pcb, (uint)ms.Length);
ms.WriteTo(codeBlock);
return((uint )ms.Length);
}
}
