Exemplo n.º 1
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 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));
 }
Exemplo n.º 2
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        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();
        }
Exemplo n.º 3
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        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 }));
        }
Exemplo n.º 4
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 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();
 }
Exemplo n.º 5
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        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);
        }
Exemplo n.º 6
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        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));
        }
Exemplo n.º 7
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        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);
        }
Exemplo n.º 8
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        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, }));
        }
Exemplo n.º 9
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        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 }));
        }
Exemplo n.º 10
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        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);
        }
Exemplo n.º 11
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        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}));
        }