private static void HandleClientThread()
{
try
{
while (!cancellation.Token.IsCancellationRequested)
{
Context context;
while (ContextQueue.Count == 0)
{
Thread.Sleep(10);
if (cancellation.Token.IsCancellationRequested)
{
return;
}
}
if (!ContextQueue.TryDequeue(out context))
{
continue;
}
context.Server.SetupContext(context);
lock (CurrentConnections){
CurrentConnections.Add(context);
}
}
}
catch (Exception ex)
{
Console.WriteLine(ex);
}
}
// Accepts new connection contexts
private void AcceptContext()
{
// Create a wait handle array so we can cancel this thread if need be
WaitHandle[] Wait = new[] { ReadyEvent, StopEvent };
while (0 == WaitHandle.WaitAny(Wait))
{
// Lock our context queue to prevent race conditions
lock (ContextQueue)
{
// Context queue has entries, accept one
if (ContextQueue.Count > 0)
{
// Dequeue next context in line
var Context = ContextQueue.Dequeue();
// Handle this context
HandleRequest(Context);
}
// There are no entries in the connection queue
else
{
// No context in line, reset ready event
ReadyEvent.Reset();
continue;
}
}
}
}
/// <summary>
/// Fires when a client connects.
/// </summary>
/// <param name="data">The TCP Connection.</param>
protected override void OnRunClient(object data)
{
try
{
var connection = (TcpClient)data;
var context = new Context(this, connection);
context.UserContext.ClientAddress = context.Connection.Client.RemoteEndPoint;
context.UserContext.SetOnConnect(OnConnect);
context.UserContext.SetOnConnected(OnConnected);
context.UserContext.SetOnDisconnect(OnDisconnect);
context.UserContext.SetOnSend(OnSend);
context.UserContext.SetOnReceive(OnReceive);
context.BufferSize = BufferSize;
context.UserContext.OnConnect();
if (context.Connected)
{
ContextQueue.Enqueue(context);
}
}
catch (Exception)
{
}
}
private static void HandleClientThread()
{
while (!Handler.Shutdown.Token.IsCancellationRequested)
{
Context context;
while (ContextQueue.Count == 0)
{
Thread.Sleep(10);
if (Handler.Shutdown.IsCancellationRequested)
{
return;
}
}
if (!ContextQueue.TryDequeue(out context))
{
continue;
}
lock (ContextMapping)
{
WebSocketServer server = ContextMapping[context];
server.SetupContext(context);
}
lock (CurrentConnections){
CurrentConnections.Add(context);
}
}
}
// Listens for new requests and enqueues them
private void Listen()
{
while (Listener.IsListening)
{
// Accept new connection context
var Context = Listener.BeginGetContext((IAsyncResult Result) =>
{
try
{
// Lock our context queue to prevent race conditions
lock (ContextQueue)
{
// Add new connection context to our context queue
ContextQueue.Enqueue(Listener.EndGetContext(Result));
// Signal that a context is ready to be accepted
ReadyEvent.Set();
}
}
catch { }
}, null);
// Wait for exit
if (WaitHandle.WaitAny(new[] { StopEvent, Context.AsyncWaitHandle }) == 0)
{
return;
}
}
}
private static void HandleClientThread()
{
while (true)
{
Context context;
while (ContextQueue.Count == 0)
{
Thread.Sleep(10);
}
if (!ContextQueue.TryDequeue(out context))
{
continue;
}
lock (ContextMapping)
{
WebSocketServer client = ContextMapping[context];
client.SetupContext(context);
}
lock (CurrentConnections){
CurrentConnections.Add(context);
}
}
}
/// <summary>
/// Replaces the context in the core and saves the old one in the queue.
/// </summary>
/// <param name="core"> The core whose context had a context switch</param>
private void SwapContext(Core core)
{
// If context queue is empty then keep running the same thread
if (ContextQueue.Count > 0)
{
var newContext = ContextQueue.Dequeue();
var oldContext = core.Context;
ContextQueue.Enqueue(oldContext);
core.Context = newContext;
core.ThereAreContexts = true;
}
core.RemainingThreadCycles = Quantum; // Restores remaining cycles to the quantum value.
}
/// <summary>
/// Fires when a client connects.
/// </summary>
/// <param name="data">The TCP Connection.</param>
protected override void OnRunClient(object data)
{
var connection = (TcpClient)data;
var context = new Context(this, connection);
context.UserContext.ClientAddress = context.Connection.Client.RemoteEndPoint;
context.UserContext.SetOnConnect(OnConnect);
context.UserContext.SetOnConnected(OnConnected);
context.UserContext.SetOnDisconnect(OnDisconnect);
context.UserContext.SetOnSend(OnSend);
context.UserContext.SetOnReceive(OnReceive);
context.UserContext.OnConnect();
if (context.Connected)
{
lock (ContextMapping)
{
ContextMapping[context] = this;
}
ContextQueue.Enqueue(context);
}
}
/// <summary>
/// Picks off a context from the context queue.
/// </summary>
/// <returns> Thre next context of the queue or null if the queue is empty.</returns>
private Context GetNewContext()
{
return ContextQueue.Count == 0 ? null : ContextQueue.Dequeue();
}
/// <summary>
/// Method in charge of creating and initializing all data structures and objects needed in the simulation
/// </summary>
private void InitializeStructures()
{
/** Initialize the data block of main Memory **/
var dataBlocks = new Block<int>[Constants.DataBlocksInMemory];
for (var i = 0; i < Constants.DataBlocksInMemory; i++)
{
var words = new int[Constants.WordsInBlock];
for (var j = 0; j < Constants.WordsInBlock; j++)
{
words[j] = Constants.DefaultDataValue;
}
dataBlocks[i] = new Block<int>(words);
}
/* Now we initialize the instruction block of main memory and we fill up the context queue*/
var pc = 0;
var blockNum = 0;
var wordNum = 0;
var instructionBlocks = new Block<Instruction>[Constants.InstructionBlocksInMemory];
Instruction[] instructionArray = null;
for (var i = 0; i < Constants.NumberOfThreadsToLoad; i++)
{
ContextQueue.Enqueue(new Context(pc, i));
var filePath = Constants.FilePath + i + Constants.FileExtension;
string line;
// Read the file and display it line by line.
var file = new System.IO.StreamReader(filePath);
const char delimiter = ' '; // Whitespace.
while ((line = file.ReadLine()) != null)
{
// Get instruction from line
var numberStrings = line.Split(delimiter);
var opCode = int.Parse(numberStrings[0]);
var source = int.Parse(numberStrings[1]);
var destiny = int.Parse(numberStrings[2]);
var inmediate = int.Parse(numberStrings[3]);
var instruction = new Instruction(opCode, source, destiny, inmediate);
if (instructionArray == null)
{
instructionArray = new Instruction[Constants.WordsInBlock];
}
instructionArray[wordNum++] = instruction;
pc += 4;
if (wordNum != Constants.WordsInBlock) continue;
instructionBlocks[blockNum++] = new Block<Instruction>(instructionArray);
wordNum = 0;
instructionArray = null;
}
file.Close();
}
// If the instructions in the .txt files did not fit evenly in the blocks.
if (instructionArray != null)
{
// Now we have to fill the instruction array and save it to the last block
for (var i = wordNum; i < Constants.WordsInBlock; i++)
{
instructionArray[i] = new Instruction();
}
instructionBlocks[blockNum++] = new Block<Instruction>(instructionArray);
}
// Now we proceed to fill the remaining empty blocks (if any) with the standard default instruction
for (var i = blockNum; i < Constants.InstructionBlocksInMemory; i++)
{
instructionArray = new Instruction[Constants.WordsInBlock];
for (var j = 0; j < Constants.WordsInBlock; j++)
{
instructionArray[j] = new Instruction();
}
instructionBlocks[i] = new Block<Instruction>(instructionArray);
}
/*
* At this point the instruction block is ready.
* Now, initialize the Memory structure.
*/
Memory.Instance.InstructionBlocks = instructionBlocks;
Memory.Instance.DataBlocks = dataBlocks;
// Creates the four caches. Two per core
var dataCacheZero = new Cache<int>(Constants.CoreOneCacheSize);
var instructionCacheZero = new Cache<Instruction>(Constants.CoreOneCacheSize);
var dataCacheOne = new Cache<int>(Constants.CoreOneCacheSize);
var instructionCacheOne = new Cache<Instruction>(Constants.CoreOneCacheSize);
// Set each cache with the other cache connected to it.
dataCacheZero.OtherCache = dataCacheOne;
dataCacheOne.OtherCache = dataCacheZero;
instructionCacheZero.OtherCache = instructionCacheOne;
instructionCacheOne.OtherCache = instructionCacheZero;
// Creates the two cores of the processor
CoreOne = new Core(instructionCacheOne, dataCacheOne);
CoreZero = new Core(instructionCacheZero, dataCacheZero);
}
