public void ReleaseLock(uint lockNo)
{
if (lockNo == 0 || lockNo > LockCount)
{
return;
}
var @lock = Locks[lockNo - 1];
if (@lock.Owner != CurrentProcess.Id)
{
return;
}
@lock.RefCount--;
if (@lock.RefCount != 0)
{
return;
}
@lock.Owner = 0;
@lock.RefCount = 0;
var blockingProcess = DeviceReadQueue.Dequeue(@lock.Handle);
if (blockingProcess == null)
{
return;
}
var pcb = blockingProcess.Process;
AcquireLock(pcb, @lock);
ReadyQueue.Enqueue(pcb);
}
public void Sleep(uint sleep)
{
var handle = SleepTimer.Register(sleep);
DeviceReadQueue.Enqueue(handle, CurrentProcess);
CurrentProcess = null;
}
public void Input(DeviceId deviceId, OpCodeFlag flag, uint rX)
{
if (Enum.IsDefined(typeof(DeviceId), deviceId))
{
DeviceReadQueue.Enqueue(deviceId, CurrentProcess, flag, rX);
CurrentProcess = null;
}
else
{
CurrentProcess.Zf = true;
}
}
public void WaitEvent(uint eventNo)
{
if (eventNo == 0 || eventNo > EventCount)
{
return;
}
var ev = Events[eventNo - 1];
DeviceReadQueue.Enqueue(ev.Handle, CurrentProcess);
CurrentProcess = null;
}
public void SignalEvent(uint eventNo)
{
if (eventNo == 0 || eventNo > EventCount)
{
return;
}
var ev = Events[eventNo - 1];
BlockingProcess blockingProcess;
while ((blockingProcess = DeviceReadQueue.Dequeue(ev.Handle)) != null)
{
ReadyQueue.Enqueue(blockingProcess.Process);
}
}
private void TickSleepTimer()
{
DeviceId sleepTimer;
if (!SleepTimer.Tick(out sleepTimer))
{
return;
}
BlockingProcess wakingProcess;
while ((wakingProcess = DeviceReadQueue.Dequeue(sleepTimer)) != null)
{
ReadyQueue.Enqueue(wakingProcess.Process);
}
}
public void AcquireLock(uint lockNo)
{
if (lockNo == 0 || lockNo > LockCount)
{
return;
}
var @lock = Locks[lockNo - 1];
if (@lock.Owner == CurrentProcess.Id || @lock.Owner == 0)
{
AcquireLock(CurrentProcess, @lock);
return;
}
DeviceReadQueue.Enqueue(@lock.Handle, CurrentProcess);
CurrentProcess = null;
}
private void ReadTerminal()
{
uint value;
if (!InputDevice.Get(out value))
{
return;
}
BlockingProcess wakingProcess;
while ((wakingProcess = DeviceReadQueue.Dequeue(DeviceId.Terminal)) != null)
{
var process = wakingProcess.Process;
process.Registers[wakingProcess.Argument] = value;
ReadyQueue.Enqueue(process);
}
}
