public void FinishWrite(SocketChannelAsyncOperation operation)
{
bool resetWritePending = this.Channel.ResetState(StateFlags.WriteScheduled);
Contract.Assert(resetWritePending);
var input = OutboundBuffer;
try
{
operation.Validate();
var sent = operation.BytesTransferred;
Channel.ResetWriteOperation();
if (sent > 0)
{
input.RemoveBytes(sent);
}
}
catch (Exception ex)
{
input.FailFlushed(ex, true);
throw;
}
// directly call super.flush0() to force a flush now
base.Flush0();
}
protected void IncompleteWrite(bool scheduleAsync, SocketChannelAsyncOperation operation)
{
// Did not write completely.
if (scheduleAsync)
{
this.SetState(StateFlags.WriteScheduled);
bool pending;
if (ExecutionContext.IsFlowSuppressed())
{
pending = this.Socket.SendAsync(operation);
}
else
{
using (ExecutionContext.SuppressFlow())
{
pending = this.Socket.SendAsync(operation);
}
}
if (!pending)
{
((ISocketChannelUnsafe)this.Unsafe).FinishWrite(operation);
}
}
else
{
// Schedule flush again later so other tasks can be picked up input the meantime
this.EventLoop.Execute(FlushAction, this);
}
}
protected SocketChannelAsyncOperation PrepareWriteOperation(ArraySegment <byte> buffer)
{
SocketChannelAsyncOperation operation = WriteOperation;
operation.SetBuffer(buffer.Array, buffer.Offset, buffer.Count);
return(operation);
}
protected override bool DoConnect(EndPoint remoteAddress, EndPoint localAddress)
{
if (localAddress != null)
{
Socket.Bind(localAddress);
}
var success = false;
try
{
var eventPayload = new SocketChannelAsyncOperation(this, false);
eventPayload.RemoteEndPoint = remoteAddress;
var connected = !Socket.ConnectAsync(eventPayload);
success = true;
return(connected);
}
finally
{
if (!success)
{
DoClose();
}
}
}
protected override void DoClose()
{
var promise = _connectPromise;
if (promise != null)
{
// Use TrySetException() instead of SetException() to avoid the race against cancellation due to timeout.
promise.TrySetException(ClosedChannelException.Instance);
_connectPromise = null;
}
var cancellationTask = _connectCancellationTask;
if (cancellationTask != null)
{
cancellationTask.Cancel();
_connectCancellationTask = null;
}
var readOp = _readOperation;
if (readOp != null)
{
readOp.Dispose();
_readOperation = null;
}
var writeOp = _writeOperation;
if (writeOp != null)
{
writeOp.Dispose();
_writeOperation = null;
}
}
protected SocketChannelAsyncOperation PrepareWriteOperation(IList <ArraySegment <byte> > buffers)
{
SocketChannelAsyncOperation operation = WriteOperation;
operation.BufferList = buffers;
return(operation);
}
public void FinishWrite(SocketChannelAsyncOperation operation)
{
var input = OutboundBuffer;
try
{
operation.Validate();
var sent = operation.BytesTransferred;
Channel.ResetWriteOperation();
if (sent > 0)
{
var msg = input.Current;
var buffer = msg as IByteBuf;
if (buffer != null)
{
buffer.SetWriterIndex(buffer.WriterIndex + sent);
}
// todo: FileRegion support
}
}
catch (Exception ex)
{
input.FailFlushed(ex, true);
throw;
}
// directly call super.flush0() to force a flush now
base.Flush0();
}
public void FinishConnect(SocketChannelAsyncOperation operation)
{
Contract.Assert(_channel.EventLoop.InEventLoop);
var ch = Channel;
try
{
var wasActive = ch.IsActive;
ch.DoFinishConnect(operation);
FulfillConnectPromise(wasActive);
}
catch (Exception ex)
{
var promise = ch._connectPromise;
var remoteAddress = promise == null ? null : (EndPoint)promise.Task.AsyncState;
FulfillConnectPromise(AnnotateConnectException(ex, remoteAddress));
}
finally
{
// Check for null as the connectTimeoutFuture is only created if a connectTimeoutMillis > 0 is used
// See https://github.com/netty/netty/issues/1770
if (ch._connectCancellationTask != null)
{
ch._connectCancellationTask.Cancel();
}
ch._connectPromise = null;
}
}
protected override void ScheduleSocketRead()
{
SocketChannelAsyncOperation operation = this.AcceptOperation;
bool pending = this.Socket.AcceptAsync(operation);
if (!pending)
{
this.EventLoop.Execute(ReadCompletedSyncCallback, this.Unsafe, operation);
}
}
protected override void DoFinishConnect(SocketChannelAsyncOperation operation)
{
try
{
operation.Validate();
}
finally
{
operation.Dispose();
}
OnConnected();
}
protected SocketChannelAsyncOperation PrepareWriteOperation(IByteBuf buffer)
{
var operation = _writeOperation ?? (_writeOperation = new SocketChannelAsyncOperation(this, false));
if (!buffer.HasArray)
{
throw new NotImplementedException(
"IByteBuffer implementations not backed by array are currently not supported.");
}
operation.SetBuffer(buffer.Array, buffer.ArrayOffset + buffer.WriterIndex, buffer.WritableBytes);
return(operation);
}
public override void FinishRead(SocketChannelAsyncOperation operation)
{
Contract.Requires(this._channel.EventLoop.InEventLoop);
TcpServerSocketChannel ch = this.Channel;
ch.ResetState(StateFlags.ReadScheduled);
IChannelConfiguration config = ch.Configuration;
int maxMessagesPerRead = config.MaxMessagesPerRead;
IChannelPipeline pipeline = ch.Pipeline;
bool closed = false;
Exception exception = null;
int messageCount = 0;
try
{
Socket connectedSocket = null;
try
{
connectedSocket = operation.AcceptSocket;
operation.Validate();
operation.AcceptSocket = null;
var message = new TcpSocketChannel(ch, connectedSocket, true);
ch.ReadPending = false;
pipeline.FireChannelRead(message);
messageCount++;
if (!config.AutoRead && !ch.ReadPending)
{
// ChannelConfig.setAutoRead(false) was called in the meantime.
// Completed Accept has to be processed though.
return;
}
while (messageCount < maxMessagesPerRead)
{
connectedSocket = null;
connectedSocket = ch.Socket.Accept();
message = new TcpSocketChannel(ch, connectedSocket, true);
pipeline.FireChannelRead(message);
// stop reading and remove op
if (!config.AutoRead)
{
break;
}
messageCount++;
}
}
catch (ObjectDisposedException)
{
closed = true;
}
catch (Exception ex)
{
var asSocketException = ex as SocketException;
if (asSocketException == null || asSocketException.SocketErrorCode != SocketError.WouldBlock)
{
Logger.Warning(ex, "Failed to create a new channel from an accepted socket.");
if (connectedSocket != null)
{
try
{
connectedSocket.Close();
}
catch (Exception ex2)
{
Logger.Warning(ex2, "Failed to close a socket.");
}
}
exception = ex;
}
}
pipeline.FireChannelReadComplete();
if (exception != null)
{
// ServerChannel should not be closed even on SocketException because it can often continue
// accepting incoming connections. (e.g. too many open files)
pipeline.FireExceptionCaught(exception);
}
if (closed)
{
if (ch.IsOpen)
{
this.CloseAsync();
}
}
}
finally
{
// Check if there is a readPending which was not processed yet.
if (!closed && (config.AutoRead || ch.ReadPending))
{
ch.DoBeginRead();
}
}
}
protected void IncompleteWrite(bool scheduleAsync, SocketChannelAsyncOperation operation)
{
// Did not write completely.
if (scheduleAsync)
{
this.SetState(StateFlags.WriteScheduled);
bool pending;
if (ExecutionContext.IsFlowSuppressed())
{
pending = this.Socket.SendAsync(operation);
}
else
{
using (ExecutionContext.SuppressFlow())
{
pending = this.Socket.SendAsync(operation);
}
}
if (!pending)
{
((ISocketChannelUnsafe) this.Unsafe).FinishWrite(operation);
}
}
else
{
// Schedule flush again later so other tasks can be picked up input the meantime
this.EventLoop.Execute(FlushAction, this);
}
}
public abstract void FinishRead(SocketChannelAsyncOperation operation);
protected override void DoClose()
{
var promise = _connectPromise;
if (promise != null)
{
// Use TrySetException() instead of SetException() to avoid the race against cancellation due to timeout.
promise.TrySetException(ClosedChannelException.Instance);
_connectPromise = null;
}
var cancellationTask = _connectCancellationTask;
if (cancellationTask != null)
{
cancellationTask.Cancel();
_connectCancellationTask = null;
}
var readOp = _readOperation;
if (readOp != null)
{
readOp.Dispose();
_readOperation = null;
}
var writeOp = _writeOperation;
if (writeOp != null)
{
writeOp.Dispose();
_writeOperation = null;
}
}
/// <summary> /// Finish the connect /// </summary> protected abstract void DoFinishConnect(SocketChannelAsyncOperation operation);
public override void FinishRead(SocketChannelAsyncOperation operation)
{
var ch = Channel;
ch.ResetState(StateFlags.ReadScheduled);
var config = ch.Configuration;
var pipeline = ch.Pipeline;
var allocator = config.Allocator;
var maxMessagesPerRead = config.MaxMessagesPerRead;
var allocHandle = RecvBufAllocHandle;
IByteBuf byteBuf = null;
var messages = 0;
var close = false;
try
{
operation.Validate();
var totalReadAmount = 0;
var readPendingReset = false;
do
{
byteBuf = allocHandle.Allocate(allocator);
var writable = byteBuf.WritableBytes;
var localReadAmount = ch.DoReadBytes(byteBuf);
if (localReadAmount <= 0)
{
// not was read release the buffer
byteBuf.Release();
byteBuf = null;
close = localReadAmount < 0;
break;
}
if (!readPendingReset)
{
readPendingReset = true;
ch.ReadPending = false;
}
pipeline.FireChannelRead(byteBuf);
byteBuf = null;
if (totalReadAmount >= int.MaxValue - localReadAmount)
{
// Avoid overflow.
totalReadAmount = int.MaxValue;
break;
}
totalReadAmount += localReadAmount;
// stop reading
if (!config.AutoRead)
{
break;
}
if (localReadAmount < writable)
{
// Read less than what the buffer can hold,
// which might mean we drained the recv buffer completely.
break;
}
} while (++messages < maxMessagesPerRead);
pipeline.FireChannelReadComplete();
allocHandle.Record(totalReadAmount);
if (close)
{
CloseOnRead();
close = false;
}
}
catch (Exception t)
{
HandleReadException(pipeline, byteBuf, t, close);
}
finally
{
// Check if there is a readPending which was not processed yet.
// This could be for two reasons:
// /// The user called Channel.read() or ChannelHandlerContext.read() input channelRead(...) method
// /// The user called Channel.read() or ChannelHandlerContext.read() input channelReadComplete(...) method
//
// See https://github.com/netty/netty/issues/2254
if (!close && (ch.ReadPending || config.AutoRead))
{
ch.DoBeginRead();
}
}
}
protected override void DoWrite(ChannelOutboundBuffer input)
{
while (true)
{
int size = input.Count;
if (size == 0)
{
// All written
break;
}
long writtenBytes = 0;
bool done = false;
bool setOpWrite = false;
// Ensure the pending writes are made of ByteBufs only.
List <ArraySegment <byte> > nioBuffers = input.GetNioBuffers();
int nioBufferCnt = nioBuffers.Count;
long expectedWrittenBytes = input.NioBufferSize;
Socket socket = this.Socket;
// Always use nioBuffers() to workaround data-corruption.
// See https://github.com/netty/netty/issues/2761
switch (nioBufferCnt)
{
case 0:
// We have something else beside ByteBuffers to write so fallback to normal writes.
base.DoWrite(input);
return;
case 1:
// Only one ByteBuf so use non-gathering write
ArraySegment <byte> nioBuffer = nioBuffers[0];
for (int i = this.Configuration.WriteSpinCount - 1; i >= 0; i--)
{
SocketError errorCode;
int localWrittenBytes = socket.Send(nioBuffer.Array, nioBuffer.Offset, nioBuffer.Count,
SocketFlags.None, out errorCode);
if (errorCode != SocketError.Success && errorCode != SocketError.WouldBlock)
{
throw new SocketException((int)errorCode);
}
if (localWrittenBytes == 0)
{
setOpWrite = true;
break;
}
expectedWrittenBytes -= localWrittenBytes;
writtenBytes += localWrittenBytes;
if (expectedWrittenBytes == 0)
{
done = true;
break;
}
}
break;
default:
for (int i = this.Configuration.WriteSpinCount - 1; i >= 0; i--)
{
SocketError errorCode;
long localWrittenBytes = socket.Send(nioBuffers, SocketFlags.None, out errorCode);
if (errorCode != SocketError.Success && errorCode != SocketError.WouldBlock)
{
throw new SocketException((int)errorCode);
}
if (localWrittenBytes == 0)
{
setOpWrite = true;
break;
}
expectedWrittenBytes -= localWrittenBytes;
writtenBytes += localWrittenBytes;
if (expectedWrittenBytes == 0)
{
done = true;
break;
}
}
break;
}
// Release the fully written buffers, and update the indexes of the partially written buffer.
input.RemoveBytes(writtenBytes);
if (!done)
{
SocketChannelAsyncOperation asyncOperation = this.PrepareWriteOperation(nioBuffers);
// Did not write all buffers completely.
this.IncompleteWrite(setOpWrite, asyncOperation);
break;
}
}
}
/// <summary> /// Finish the connect /// </summary> protected abstract void DoFinishConnect(SocketChannelAsyncOperation operation);
public abstract void FinishRead(SocketChannelAsyncOperation operation);
public void FinishConnect(SocketChannelAsyncOperation operation)
{
Contract.Assert(_channel.EventLoop.InEventLoop);
var ch = Channel;
try
{
var wasActive = ch.IsActive;
ch.DoFinishConnect(operation);
FulfillConnectPromise(wasActive);
}
catch (Exception ex)
{
var promise = ch._connectPromise;
var remoteAddress = promise == null ? null : (EndPoint) promise.Task.AsyncState;
FulfillConnectPromise(AnnotateConnectException(ex, remoteAddress));
}
finally
{
// Check for null as the connectTimeoutFuture is only created if a connectTimeoutMillis > 0 is used
// See https://github.com/netty/netty/issues/1770
if (ch._connectCancellationTask != null)
{
ch._connectCancellationTask.Cancel();
}
ch._connectPromise = null;
}
}
public override void FinishRead(SocketChannelAsyncOperation operation)
{
Contract.Requires(this._channel.EventLoop.InEventLoop);
TcpServerSocketChannel ch = this.Channel;
ch.ResetState(StateFlags.ReadScheduled);
IChannelConfiguration config = ch.Configuration;
int maxMessagesPerRead = config.MaxMessagesPerRead;
IChannelPipeline pipeline = ch.Pipeline;
bool closed = false;
Exception exception = null;
int messageCount = 0;
try
{
Socket connectedSocket = null;
try
{
connectedSocket = operation.AcceptSocket;
operation.Validate();
operation.AcceptSocket = null;
var message = new TcpSocketChannel(ch, connectedSocket, true);
ch.ReadPending = false;
pipeline.FireChannelRead(message);
messageCount++;
if (!config.AutoRead && !ch.ReadPending)
{
// ChannelConfig.setAutoRead(false) was called in the meantime.
// Completed Accept has to be processed though.
return;
}
while (messageCount < maxMessagesPerRead)
{
connectedSocket = null;
connectedSocket = ch.Socket.Accept();
message = new TcpSocketChannel(ch, connectedSocket, true);
pipeline.FireChannelRead(message);
// stop reading and remove op
if (!config.AutoRead)
{
break;
}
messageCount++;
}
}
catch (ObjectDisposedException)
{
closed = true;
}
catch (Exception ex)
{
var asSocketException = ex as SocketException;
if (asSocketException == null || asSocketException.SocketErrorCode != SocketError.WouldBlock)
{
Logger.Warning(ex, "Failed to create a new channel from an accepted socket.");
if (connectedSocket != null)
{
try
{
connectedSocket.Close();
}
catch (Exception ex2)
{
Logger.Warning(ex2, "Failed to close a socket.");
}
}
exception = ex;
}
}
pipeline.FireChannelReadComplete();
if (exception != null)
{
// ServerChannel should not be closed even on SocketException because it can often continue
// accepting incoming connections. (e.g. too many open files)
pipeline.FireExceptionCaught(exception);
}
if (closed)
{
if (ch.IsOpen)
{
this.CloseAsync();
}
}
}
finally
{
// Check if there is a readPending which was not processed yet.
if (!closed && (config.AutoRead || ch.ReadPending))
{
ch.DoBeginRead();
}
}
}
public void FinishWrite(SocketChannelAsyncOperation operation)
{
bool resetWritePending = this.Channel.ResetState(StateFlags.WriteScheduled);
Contract.Assert(resetWritePending);
var input = OutboundBuffer;
try
{
operation.Validate();
var sent = operation.BytesTransferred;
Channel.ResetWriteOperation();
if (sent > 0)
{
input.RemoveBytes(sent);
}
}
catch (Exception ex)
{
input.FailFlushed(ex, true);
throw;
}
// directly call super.flush0() to force a flush now
base.Flush0();
}
protected override bool DoConnect(EndPoint remoteAddress, EndPoint localAddress)
{
if (localAddress != null)
{
Socket.Bind(localAddress);
}
var success = false;
try
{
var eventPayload = new SocketChannelAsyncOperation(this, false);
eventPayload.RemoteEndPoint = remoteAddress;
var connected = !Socket.ConnectAsync(eventPayload);
success = true;
return connected;
}
finally
{
if (!success)
{
DoClose();
}
}
}
protected override void DoFinishConnect(SocketChannelAsyncOperation operation)
{
throw new NotSupportedException();
}
protected override void DoFinishConnect(SocketChannelAsyncOperation operation)
{
try
{
operation.Validate();
}
finally
{
operation.Dispose();
}
OnConnected();
}
public override void FinishRead(SocketChannelAsyncOperation operation)
{
var ch = Channel;
ch.ResetState(StateFlags.ReadScheduled);
var config = ch.Configuration;
if (!config.AutoRead && !ch.ReadPending)
{
// ChannelConfig.setAutoRead(false) was called in the meantime
//removeReadOp(); -- noop with IOCP, just don't schedule receive again
return;
}
var pipeline = ch.Pipeline;
var allocator = config.Allocator;
var maxMessagesPerRead = config.MaxMessagesPerRead;
var allocHandle = RecvBufAllocHandle;
IByteBuf byteBuf = null;
var messages = 0;
var close = false;
try
{
operation.Validate();
var totalReadAmount = 0;
var readPendingReset = false;
do
{
byteBuf = allocHandle.Allocate(allocator);
var writable = byteBuf.WritableBytes;
var localReadAmount = ch.DoReadBytes(byteBuf);
if (localReadAmount <= 0)
{
// not was read release the buffer
byteBuf.Release();
byteBuf = null;
close = localReadAmount < 0;
break;
}
if (!readPendingReset)
{
readPendingReset = true;
ch.ReadPending = false;
}
pipeline.FireChannelRead(byteBuf);
byteBuf = null;
if (totalReadAmount >= int.MaxValue - localReadAmount)
{
// Avoid overflow.
totalReadAmount = int.MaxValue;
break;
}
totalReadAmount += localReadAmount;
// stop reading
if (!config.AutoRead)
{
break;
}
if (localReadAmount < writable)
{
// Read less than what the buffer can hold,
// which might mean we drained the recv buffer completely.
break;
}
} while (++messages < maxMessagesPerRead);
pipeline.FireChannelReadComplete();
allocHandle.Record(totalReadAmount);
if (close)
{
CloseOnRead();
close = false;
}
}
catch (Exception t)
{
HandleReadException(pipeline, byteBuf, t, close);
}
finally
{
// Check if there is a readPending which was not processed yet.
// This could be for two reasons:
// /// The user called Channel.read() or ChannelHandlerContext.read() input channelRead(...) method
// /// The user called Channel.read() or ChannelHandlerContext.read() input channelReadComplete(...) method
//
// See https://github.com/netty/netty/issues/2254
if (!close && (config.AutoRead || ch.ReadPending))
{
ch.DoBeginRead();
}
}
}
protected override void DoFinishConnect(SocketChannelAsyncOperation operation)
{
throw new NotSupportedException();
}