| private Pack ( System iocb ) : System.Threading.NativeOverlapped* | ||
| iocb | System | |
| return | System.Threading.NativeOverlapped* | |
internal unsafe HttpResponseStreamAsyncResult(object asyncObject, object userState, AsyncCallback callback, byte[] buffer, int offset, int size, bool chunked, bool sentHeaders) : base(asyncObject, userState, callback)
{
this.m_SentHeaders = sentHeaders;
Overlapped overlapped = new Overlapped {
AsyncResult = this
};
if (size == 0)
{
this.m_DataChunks = null;
this.m_pOverlapped = overlapped.Pack(s_IOCallback, null);
}
else
{
this.m_DataChunks = new UnsafeNclNativeMethods.HttpApi.HTTP_DATA_CHUNK[chunked ? 3 : 1];
object[] userData = new object[1 + this.m_DataChunks.Length];
userData[this.m_DataChunks.Length] = this.m_DataChunks;
int num = 0;
byte[] arr = null;
if (chunked)
{
arr = ConnectStream.GetChunkHeader(size, out num);
this.m_DataChunks[0] = new UnsafeNclNativeMethods.HttpApi.HTTP_DATA_CHUNK();
this.m_DataChunks[0].DataChunkType = UnsafeNclNativeMethods.HttpApi.HTTP_DATA_CHUNK_TYPE.HttpDataChunkFromMemory;
this.m_DataChunks[0].BufferLength = (uint) (arr.Length - num);
userData[0] = arr;
this.m_DataChunks[1] = new UnsafeNclNativeMethods.HttpApi.HTTP_DATA_CHUNK();
this.m_DataChunks[1].DataChunkType = UnsafeNclNativeMethods.HttpApi.HTTP_DATA_CHUNK_TYPE.HttpDataChunkFromMemory;
this.m_DataChunks[1].BufferLength = (uint) size;
userData[1] = buffer;
this.m_DataChunks[2] = new UnsafeNclNativeMethods.HttpApi.HTTP_DATA_CHUNK();
this.m_DataChunks[2].DataChunkType = UnsafeNclNativeMethods.HttpApi.HTTP_DATA_CHUNK_TYPE.HttpDataChunkFromMemory;
this.m_DataChunks[2].BufferLength = (uint) NclConstants.CRLF.Length;
userData[2] = NclConstants.CRLF;
}
else
{
this.m_DataChunks[0] = new UnsafeNclNativeMethods.HttpApi.HTTP_DATA_CHUNK();
this.m_DataChunks[0].DataChunkType = UnsafeNclNativeMethods.HttpApi.HTTP_DATA_CHUNK_TYPE.HttpDataChunkFromMemory;
this.m_DataChunks[0].BufferLength = (uint) size;
userData[0] = buffer;
}
this.m_pOverlapped = overlapped.Pack(s_IOCallback, userData);
if (chunked)
{
this.m_DataChunks[0].pBuffer = (byte*) Marshal.UnsafeAddrOfPinnedArrayElement(arr, num);
this.m_DataChunks[1].pBuffer = (byte*) Marshal.UnsafeAddrOfPinnedArrayElement(buffer, offset);
this.m_DataChunks[2].pBuffer = (byte*) Marshal.UnsafeAddrOfPinnedArrayElement(NclConstants.CRLF, 0);
}
else
{
this.m_DataChunks[0].pBuffer = (byte*) Marshal.UnsafeAddrOfPinnedArrayElement(buffer, offset);
}
}
}
internal AsyncFileStream_AsyncResult( AsyncCallback userCallback, Object stateObject, bool isWrite )
{
m_userCallback = userCallback;
m_userStateObject = stateObject;
m_waitHandle = new ManualResetEvent( false );
m_isWrite = isWrite;
Overlapped overlapped = new Overlapped( 0, 0, IntPtr.Zero, this );
m_overlapped = overlapped.Pack( s_callback, null );
}
internal void Reset(uint size) {
if (size == m_Size)
{
return;
}
if (m_Size != 0)
{
Overlapped.Free(m_pOverlapped);
}
m_Size = size;
if (size == 0)
{
m_pOverlapped = null;
m_MemoryBlob = null;
m_BackingBuffer = null;
return;
}
m_BackingBuffer = new byte[checked((int) size)];
Overlapped overlapped = new Overlapped();
overlapped.AsyncResult = this;
m_pOverlapped = overlapped.Pack(s_IOCallback, m_BackingBuffer);
m_MemoryBlob = (UnsafeNclNativeMethods.HttpApi.HTTP_SSL_CLIENT_CERT_INFO*) Marshal.UnsafeAddrOfPinnedArrayElement(m_BackingBuffer, 0);
}
public void WritePipeOverlapped(int ifaceIndex, byte pipeID, byte[] buffer,
int offset, int bytesToWrite, WinUSBAsyncResult result)
{
Overlapped overlapped = new Overlapped();
overlapped.AsyncResult = result;
unsafe
{
NativeOverlapped* pOverlapped = null;
uint bytesWritten;
pOverlapped = overlapped.Pack(_PipeIOCallback, buffer);
bool success;
// Buffer is pinned already by overlapped.Pack
fixed (byte* pBuffer = buffer)
{
success = NativeInterface.WinUsb_WritePipe(_InterfaceHandle(ifaceIndex), pipeID,
pBuffer + offset, (uint)bytesToWrite, out bytesWritten, pOverlapped);
}
_HandleOverlappedAPI(success, "Failed to asynchronously write pipe on WinUSB device.",
pOverlapped, result, (int)bytesWritten);
}
}
//--------------------------------------------------------------------------
// Data transmission
//--------------------------------------------------------------------------
public override bool Send(NxtMessage msg)
{
bool fResult = false;
if (this.IsOpen)
{
try {
lock (this.msgReplyTargets)
{
this.msgReplyTargets.Add(msg);
}
byte[] rgbToSend = msg.DataForBluetoothTransmission;
int cbSent = 0;
unsafe
{
EventWaitHandle asyncWriteCompleteEvent = new EventWaitHandle(false, System.Threading.EventResetMode.ManualReset);
Overlapped overlappedWrite = new Overlapped(-1, -1, asyncWriteCompleteEvent.SafeWaitHandle.DangerousGetHandle(), null);
NativeOverlapped* pNativeOverlappedWrite = overlappedWrite.Pack(null, rgbToSend);
try
{
bool fSuccess = WriteFile(this.hSerialPort, rgbToSend, rgbToSend.Length, out cbSent, new IntPtr(pNativeOverlappedWrite));
if (!fSuccess)
{
int err = Marshal.GetLastWin32Error();
if (ERROR_IO_PENDING == err)
{
asyncWriteCompleteEvent.WaitOne();
}
else
ThrowWin32Error(err);
}
}
finally
{
System.Threading.Overlapped.Free(pNativeOverlappedWrite);
}
}
msg.NoteSent();
fResult = true;
}
catch (Exception)
{
}
}
return fResult;
}
public unsafe static bool ConnectNamedPipe(IntPtr hNamedPipe, // handle to named pipe
Overlapped lpOverlapped // overlapped structure
)
{
NativeOverlapped* overlappedPack = lpOverlapped.Pack(null, null);
bool fRet = false;
if (overlappedPack != null)
{
fRet = ConnectNamedPipe(hNamedPipe, overlappedPack);
Overlapped.Free(overlappedPack);
}
return fRet;
}
private unsafe FileStreamAsyncResult BeginWriteCore(byte[] bytes, int offset, int numBytes, AsyncCallback userCallback, object stateObject)
{
NativeOverlapped* overlappedPtr;
FileStreamAsyncResult ar = new FileStreamAsyncResult {
_handle = this._handle,
_userCallback = userCallback,
_userStateObject = stateObject,
_isWrite = true
};
ManualResetEvent event2 = new ManualResetEvent(false);
ar._waitHandle = event2;
Overlapped overlapped = new Overlapped(0, 0, IntPtr.Zero, ar);
if (userCallback != null)
{
overlappedPtr = overlapped.Pack(IOCallback, bytes);
}
else
{
overlappedPtr = overlapped.UnsafePack(null, bytes);
}
ar._overlapped = overlappedPtr;
if (this.CanSeek)
{
long length = this.Length;
if (this._exposedHandle)
{
this.VerifyOSHandlePosition();
}
if ((this._pos + numBytes) > length)
{
this.SetLengthCore(this._pos + numBytes);
}
overlappedPtr->OffsetLow = (int) this._pos;
overlappedPtr->OffsetHigh = (int) (this._pos >> 0x20);
this.SeekCore((long) numBytes, SeekOrigin.Current);
}
int hr = 0;
if ((this.WriteFileNative(this._handle, bytes, offset, numBytes, overlappedPtr, out hr) == -1) && (numBytes != -1))
{
if (hr == 0xe8)
{
ar.CallUserCallback();
return ar;
}
if (hr == 0x3e5)
{
return ar;
}
if (!this._handle.IsClosed && this.CanSeek)
{
this.SeekCore(0L, SeekOrigin.Current);
}
if (hr == 0x26)
{
__Error.EndOfFile();
return ar;
}
__Error.WinIOError(hr, string.Empty);
}
return ar;
}
public override IAsyncResult BeginWrite(byte[] buffer, int offset, int count, AsyncCallback callback, object state)
{
SerialAsyncResult ar = new SerialAsyncResult(this);
ar.Init(state, callback, false);
Overlapped ov = new Overlapped(0, 0, ar.AsyncWaitHandle.Handle.ToInt32(), ar);
unsafe { fixed (byte* data = &buffer[0]) {
int write = 0;
NativeOverlapped* nov = ov.Pack(m_IOCompletionCallback);
WriteFile(m_hFile, data, count, &write, nov);
} }
if (GetLastError() == ERROR_IO_PENDING)
return ar;
else
throw new Exception("Unable to initialize write. Errorcode: " + GetLastError().ToString());
}
internal HttpResponseStreamAsyncResult(object asyncObject, object userState, AsyncCallback callback, byte[] buffer, int offset, int size, bool chunked, bool sentHeaders): base(asyncObject, userState, callback){
m_SentHeaders = sentHeaders;
Overlapped overlapped = new Overlapped();
overlapped.AsyncResult = this;
if (size == 0) {
m_DataChunks = null;
m_pOverlapped = overlapped.Pack(s_IOCallback, null);
}
else {
m_DataChunks = new UnsafeNclNativeMethods.HttpApi.HTTP_DATA_CHUNK[chunked ? 3 : 1];
GlobalLog.Print("HttpResponseStreamAsyncResult#" + ValidationHelper.HashString(this) + "::.ctor() m_pOverlapped:0x" + ((IntPtr)m_pOverlapped).ToString("x8"));
object[] objectsToPin = new object[1 + m_DataChunks.Length];
objectsToPin[m_DataChunks.Length] = m_DataChunks;
int chunkHeaderOffset = 0;
byte[] chunkHeaderBuffer = null;
if (chunked) {
chunkHeaderBuffer = ConnectStream.GetChunkHeader(size, out chunkHeaderOffset);
m_DataChunks[0] = new UnsafeNclNativeMethods.HttpApi.HTTP_DATA_CHUNK();
m_DataChunks[0].DataChunkType = UnsafeNclNativeMethods.HttpApi.HTTP_DATA_CHUNK_TYPE.HttpDataChunkFromMemory;
m_DataChunks[0].BufferLength = (uint)(chunkHeaderBuffer.Length - chunkHeaderOffset);
objectsToPin[0] = chunkHeaderBuffer;
m_DataChunks[1] = new UnsafeNclNativeMethods.HttpApi.HTTP_DATA_CHUNK();
m_DataChunks[1].DataChunkType = UnsafeNclNativeMethods.HttpApi.HTTP_DATA_CHUNK_TYPE.HttpDataChunkFromMemory;
m_DataChunks[1].BufferLength = (uint)size;
objectsToPin[1] = buffer;
m_DataChunks[2] = new UnsafeNclNativeMethods.HttpApi.HTTP_DATA_CHUNK();
m_DataChunks[2].DataChunkType = UnsafeNclNativeMethods.HttpApi.HTTP_DATA_CHUNK_TYPE.HttpDataChunkFromMemory;
m_DataChunks[2].BufferLength = (uint)NclConstants.CRLF.Length;
objectsToPin[2] = NclConstants.CRLF;
}
else {
m_DataChunks[0] = new UnsafeNclNativeMethods.HttpApi.HTTP_DATA_CHUNK();
m_DataChunks[0].DataChunkType = UnsafeNclNativeMethods.HttpApi.HTTP_DATA_CHUNK_TYPE.HttpDataChunkFromMemory;
m_DataChunks[0].BufferLength = (uint)size;
objectsToPin[0] = buffer;
}
// This call will pin needed memory
m_pOverlapped = overlapped.Pack(s_IOCallback, objectsToPin);
if (chunked)
{
m_DataChunks[0].pBuffer = (byte*)(Marshal.UnsafeAddrOfPinnedArrayElement(chunkHeaderBuffer, chunkHeaderOffset));
m_DataChunks[1].pBuffer = (byte*)(Marshal.UnsafeAddrOfPinnedArrayElement(buffer, offset));
m_DataChunks[2].pBuffer = (byte*)(Marshal.UnsafeAddrOfPinnedArrayElement(NclConstants.CRLF, 0));
}
else
{
m_DataChunks[0].pBuffer = (byte*)(Marshal.UnsafeAddrOfPinnedArrayElement(buffer, offset));
}
}
}
public override int WriteDirect(Page start, long pagePosition, int pagesToWrite)
{
if (_fileInfo.Extension == ".voron" && pagePosition > 1)
{
}
var position = pagePosition * PageSize;
var toWrite = pagesToWrite * PageSize;
var overlapped = new Overlapped()
{
OffsetLow = (int)(position & 0xffffffff),
OffsetHigh = (int)(position >> 32),
};
var nativeOverlapped = overlapped.Pack(null, null);
try
{
var startWrite = start.Base;
while (toWrite != 0)
{
int written;
if (NativeFileMethods.WriteFile(_safeFileHandle, startWrite, toWrite, out written, nativeOverlapped) == false)
{
throw new Win32Exception();
}
toWrite -= written;
startWrite += written;
}
return toWrite;
}
finally
{
Overlapped.Unpack(nativeOverlapped);
Overlapped.Free(nativeOverlapped);
}
}
internal FileStreamAsyncResult(
int numBufferedBytes,
byte[] bytes,
#if USE_OVERLAPPED
SafeFileHandle handle,
#endif
AsyncCallback userCallback,
Object userStateObject,
bool isWrite)
{
_userCallback = userCallback;
_userStateObject = userStateObject;
_isWrite = isWrite;
_numBufferedBytes = numBufferedBytes;
#if USE_OVERLAPPED
_handle = handle;
#endif
// For Synchronous IO, I could go with either a callback and using
// the managed Monitor class, or I could create a handle and wait on it.
ManualResetEvent waitHandle = new ManualResetEvent(false);
_waitHandle = waitHandle;
#if USE_OVERLAPPED
// Create a managed overlapped class
// We will set the file offsets later
Overlapped overlapped = new Overlapped();
overlapped.AsyncResult = this;
// Pack the Overlapped class, and store it in the async result
var ioCallback = s_IOCallback; // cached static delegate; delay initialized due to it being SecurityCritical
if (ioCallback == null) s_IOCallback = ioCallback = new IOCompletionCallback(AsyncFSCallback);
_overlapped = overlapped.Pack(ioCallback, bytes);
Debug.Assert(_overlapped != null, "Did Overlapped.Pack or Overlapped.UnsafePack just return a null?");
#endif
}
private UnsafeNclNativeMethods.HttpApi.HTTP_REQUEST* Allocate(uint size)
{
uint newSize = size != 0 ? size : RequestBuffer == null ? 4096 : Size;
if (m_NativeOverlapped != null && newSize != RequestBuffer.Length)
{
NativeOverlapped* nativeOverlapped = m_NativeOverlapped;
m_NativeOverlapped = null;
Overlapped.Free(nativeOverlapped);
}
if (m_NativeOverlapped == null)
{
SetBuffer(checked((int) newSize));
Overlapped overlapped = new Overlapped();
overlapped.AsyncResult = m_Result;
m_NativeOverlapped = overlapped.Pack(ListenerAsyncResult.IOCallback, RequestBuffer);
return (UnsafeNclNativeMethods.HttpApi.HTTP_REQUEST*) Marshal.UnsafeAddrOfPinnedArrayElement(RequestBuffer, 0);
}
return RequestBlob;
}
private unsafe int WaitForCommEvent()
{
int eventsOccurred = 0;
Win32API_Serial.SetCommMask(_safeHandle.Handle, Win32API_Serial.ALL_EVENTS);
AsyncSerialStream_AsyncResult asyncResult = new AsyncSerialStream_AsyncResult();
asyncResult._userCallback = null;
asyncResult._userStateObject = null;
asyncResult._isWrite = false;
asyncResult._oldTimeout = -1;
asyncResult._numBufferedBytes = 0;
ManualResetEvent waitHandle = new ManualResetEvent(false);
asyncResult._waitHandle = waitHandle;
Overlapped overlapped = new Overlapped(0, 0, 0, asyncResult);
NativeOverlapped* intOverlapped = overlapped.Pack(IOCallback);
if (Win32API_Serial.WaitCommEvent(_safeHandle.Handle, ref eventsOccurred, intOverlapped) == false)
{
int hr = Marshal.GetLastWin32Error();
if (hr == Win32API_Serial.ERROR_IO_PENDING)
{
int temp = Win32API_Serial.WaitForSingleObject(waitHandle.Handle, -1);
if(temp == 0) // no error
return eventsOccurred;
else
Resources.WinIOError();
}
else
Resources.WinIOError();
}
return eventsOccurred;
}
unsafe private AsyncSerialStream_AsyncResult BeginWriteCore(byte[] array, int offset, int numBytes, AsyncCallback userCallback, Object stateObject, int timeout)
{
AsyncSerialStream_AsyncResult asyncResult = new AsyncSerialStream_AsyncResult();
asyncResult._userCallback = userCallback;
asyncResult._userStateObject = stateObject;
asyncResult._isWrite = true;
asyncResult._oldTimeout = WriteTimeout;
WriteTimeout = timeout;
ManualResetEvent waitHandle = new ManualResetEvent(false);
asyncResult._waitHandle = waitHandle;
Overlapped overlapped = new Overlapped(0, 0, 0, asyncResult);
NativeOverlapped* intOverlapped = overlapped.Pack(IOCallback);
int hr = 0;
int r = WriteFileNative(_safeHandle, array, offset, numBytes, intOverlapped, out hr);
if (r==-1)
{
if (hr != Win32API_Serial.ERROR_IO_PENDING)
{
if (hr == Win32API_Serial.ERROR_HANDLE_EOF)
Resources.EndOfFile();
else
Resources.WinIOError(hr, String.Empty);
}
}
return asyncResult;
}
unsafe private SerialStreamAsyncResult BeginWriteCore(byte[] array, int offset, int numBytes, AsyncCallback userCallback, Object stateObject)
{
// Create and store async stream class library specific data in the
// async result
SerialStreamAsyncResult asyncResult = new SerialStreamAsyncResult();
asyncResult._userCallback = userCallback;
asyncResult._userStateObject = stateObject;
asyncResult._isWrite = true;
// For Synchronous IO, I could go with either a callback and using
// the managed Monitor class, or I could create a handle and wait on it.
ManualResetEvent waitHandle = new ManualResetEvent(false);
asyncResult._waitHandle = waitHandle;
// Create a managed overlapped class
// We will set the file offsets later
Overlapped overlapped = new Overlapped(0, 0, IntPtr.Zero, asyncResult);
// Pack the Overlapped class, and store it in the async result
NativeOverlapped* intOverlapped = overlapped.Pack(IOCallback, array);
asyncResult._overlapped = intOverlapped;
int hr = 0;
// queue an async WriteFile operation and pass in a packed overlapped
int r = WriteFileNative(array, offset, numBytes, intOverlapped, out hr);
// WriteFile, the OS version, will return 0 on failure. But
// my WriteFileNative wrapper returns -1. My wrapper will return
// the following:
// On error, r==-1.
// On async requests that are still pending, r==-1 w/ hr==ERROR_IO_PENDING
// On async requests that completed sequentially, r==0
// Note that you will NEVER RELIABLY be able to get the number of bytes
// written back from this call when using overlapped IO! You must
// not pass in a non-null lpNumBytesWritten to WriteFile when using
// overlapped structures!
if (r==-1)
{
if (hr != NativeMethods.ERROR_IO_PENDING)
{
if (hr == NativeMethods.ERROR_HANDLE_EOF)
InternalResources.EndOfFile();
else
InternalResources.WinIOError(hr, String.Empty);
}
}
return asyncResult;
}
internal HttpRequestStreamAsyncResult(object asyncObject, object userState, AsyncCallback callback, byte[] buffer, int offset, uint size, uint dataAlreadyRead): base(asyncObject, userState, callback) {
m_dataAlreadyRead = dataAlreadyRead;
Overlapped overlapped = new Overlapped();
overlapped.AsyncResult = this;
m_pOverlapped = overlapped.Pack(s_IOCallback, buffer);
m_pPinnedBuffer = (void*)(Marshal.UnsafeAddrOfPinnedArrayElement(buffer, offset));
}
internal unsafe void WaitForCommEvent()
{
int unused = 0;
bool doCleanup = false;
NativeOverlapped* intOverlapped = null;
while (!ShutdownLoop) {
SerialStreamAsyncResult asyncResult = null;
if (isAsync) {
asyncResult = new SerialStreamAsyncResult();
asyncResult._userCallback = null;
asyncResult._userStateObject = null;
asyncResult._isWrite = false;
// we're going to use _numBytes for something different in this loop. In this case, both
// freeNativeOverlappedCallback and this thread will decrement that value. Whichever one decrements it
// to zero will be the one to free the native overlapped. This guarantees the overlapped gets freed
// after both the callback and GetOverlappedResult have had a chance to use it.
asyncResult._numBytes = 2;
asyncResult._waitHandle = waitCommEventWaitHandle;
waitCommEventWaitHandle.Reset();
Overlapped overlapped = new Overlapped(0, 0, waitCommEventWaitHandle.SafeWaitHandle.DangerousGetHandle(), asyncResult);
// Pack the Overlapped class, and store it in the async result
intOverlapped = overlapped.Pack(freeNativeOverlappedCallback, null);
}
fixed (int* eventsOccurredPtr = &eventsOccurred) {
if (UnsafeNativeMethods.WaitCommEvent(handle, eventsOccurredPtr, intOverlapped) == false)
{
int hr = Marshal.GetLastWin32Error();
// When a device is disconnected unexpectedly from a serial port, there appear to be
// at least two error codes Windows or drivers may return.
if (hr == NativeMethods.ERROR_ACCESS_DENIED || hr == NativeMethods.ERROR_BAD_COMMAND) {
doCleanup = true;
break;
}
if (hr == NativeMethods.ERROR_IO_PENDING)
{
Debug.Assert(isAsync, "The port is not open for async, so we should not get ERROR_IO_PENDING from WaitCommEvent");
int error;
// if we get IO pending, MSDN says we should wait on the WaitHandle, then call GetOverlappedResult
// to get the results of WaitCommEvent.
bool success = waitCommEventWaitHandle.WaitOne();
Debug.Assert(success, "waitCommEventWaitHandle.WaitOne() returned error " + Marshal.GetLastWin32Error());
do {
// NOTE: GetOverlappedResult will modify the original pointer passed into WaitCommEvent.
success = UnsafeNativeMethods.GetOverlappedResult(handle, intOverlapped, ref unused, false);
error = Marshal.GetLastWin32Error();
}
while (error == NativeMethods.ERROR_IO_INCOMPLETE && !ShutdownLoop && !success);
if (!success) {
// Ignore ERROR_IO_INCOMPLETE and ERROR_INVALID_PARAMETER, because there's a chance we'll get
// one of those while shutting down
if (! ( (error == NativeMethods.ERROR_IO_INCOMPLETE || error == NativeMethods.ERROR_INVALID_PARAMETER) && ShutdownLoop))
Debug.Assert(false, "GetOverlappedResult returned error, we might leak intOverlapped memory" + error.ToString(CultureInfo.InvariantCulture));
}
}
else if (hr != NativeMethods.ERROR_INVALID_PARAMETER) {
// ignore ERROR_INVALID_PARAMETER errors. WaitCommError seems to return this
// when SetCommMask is changed while it's blocking (like we do in Dispose())
Debug.Assert(false, "WaitCommEvent returned error " + hr);
}
}
}
if (!ShutdownLoop)
CallEvents(eventsOccurred);
if (isAsync) {
if (Interlocked.Decrement(ref asyncResult._numBytes) == 0)
Overlapped.Free(intOverlapped);
}
} // while (!ShutdownLoop)
if (doCleanup) {
// the rest will be handled in Dispose()
endEventLoop = true;
Overlapped.Free(intOverlapped);
}
eventLoopEndedSignal.Set();
}
unsafe private PipeStreamAsyncResult BeginReadCore(byte[] buffer, int offset, int count,
AsyncCallback callback, Object state)
{
Debug.Assert(_handle != null, "_handle is null");
Debug.Assert(!_handle.IsClosed, "_handle is closed");
Debug.Assert(CanRead, "can't read");
Debug.Assert(buffer != null, "buffer == null");
Debug.Assert(_isAsync, "BeginReadCore doesn't work on synchronous file streams!");
Debug.Assert(offset >= 0, "offset is negative");
Debug.Assert(count >= 0, "count is negative");
// Create and store async stream class library specific data in the async result
PipeStreamAsyncResult asyncResult = new PipeStreamAsyncResult();
asyncResult._handle = _handle;
asyncResult._userCallback = callback;
asyncResult._userStateObject = state;
asyncResult._isWrite = false;
// handle zero-length buffers separately; fixed keyword ReadFileNative doesn't like
// 0-length buffers. Call user callback and we're done
if (buffer.Length == 0)
{
asyncResult.CallUserCallback();
}
else
{
// For Synchronous IO, I could go with either a userCallback and using
// the managed Monitor class, or I could create a handle and wait on it.
ManualResetEvent waitHandle = new ManualResetEvent(false);
asyncResult._waitHandle = waitHandle;
// Create a managed overlapped class; set the file offsets later
Overlapped overlapped = new Overlapped();
overlapped.OffsetLow = 0;
overlapped.OffsetHigh = 0;
overlapped.AsyncResult = asyncResult;
// Pack the Overlapped class, and store it in the async result
NativeOverlapped* intOverlapped;
intOverlapped = overlapped.Pack(s_IOCallback, buffer);
asyncResult._overlapped = intOverlapped;
// Queue an async ReadFile operation and pass in a packed overlapped
int errorCode = 0;
int r = ReadFileNative(_handle, buffer, offset, count, intOverlapped, out errorCode);
// ReadFile, the OS version, will return 0 on failure, but this ReadFileNative wrapper
// returns -1. This will return the following:
// - On error, r==-1.
// - On async requests that are still pending, r==-1 w/ hr==ERROR_IO_PENDING
// - On async requests that completed sequentially, r==0
//
// You will NEVER RELIABLY be able to get the number of buffer read back from this call
// when using overlapped structures! You must not pass in a non-null lpNumBytesRead to
// ReadFile when using overlapped structures! This is by design NT behavior.
if (r == -1)
{
// One side has closed its handle or server disconnected. Set the state to Broken
// and do some cleanup work
if (errorCode == Interop.ERROR_BROKEN_PIPE ||
errorCode == Interop.ERROR_PIPE_NOT_CONNECTED)
{
State = PipeState.Broken;
// Clear the overlapped status bit for this special case. Failure to do so looks
// like we are freeing a pending overlapped.
intOverlapped->InternalLow = IntPtr.Zero;
// EndRead will free the Overlapped struct
asyncResult.CallUserCallback();
}
else if (errorCode != Interop.ERROR_IO_PENDING)
{
throw Win32Marshal.GetExceptionForWin32Error(errorCode);
}
}
ReadWriteAsyncParams readWriteParams = state as ReadWriteAsyncParams;
if (readWriteParams != null)
{
if (readWriteParams.CancellationHelper != null)
{
readWriteParams.CancellationHelper.AllowCancellation(_handle, intOverlapped);
}
}
}
return asyncResult;
}
static void Main(string[] args)
{
var nancyApp = StartupNancyApp();
//var workingTitleApp = StartupWorkingTitleApp();
for (;;)
{
var input = Console.ReadLine();
if (input == "exit")
{
nancyApp.Dispose();
//workingTitleApp.Dispose();
return;
}
if (input == "1")
{
var request = (HttpWebRequest)WebRequest.Create("http://127.0.0.1:8080");
try
{
request.GetResponse();
}
catch (WebException ex)
{
Console.WriteLine(ex.Message);
}
}
else if (input == "2")
{
var socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.IP);
socket.Connect("localhost", 8080);
var blocking = socket.Blocking;
socket.Blocking = false;
//var sr = socket.BeginReceive(new byte[0], 0, 0, SocketFlags.None, ar =>
// {
// socket.EndReceive(ar);
// }, null);
//var optionOutValue = new byte[4];
//var ioControl = socket.IOControl(IOControlCode.NonBlockingIO, new byte[] {1, 0, 0, 0}, optionOutValue);
unsafe
{
var wsabuf = new WSABUF();
uint numberOfBytesRecvd;
var flags = SocketFlags.None;
var result = WSARecv(
socket.Handle, ref wsabuf, 1, out numberOfBytesRecvd, ref flags, null, CallbackThunk1);
var lastError = result == -1 ? Marshal.GetLastWin32Error() : 0;
var overlapped = new Overlapped();
overlapped.AsyncResult = new ARes();
var nativeOverlapped = overlapped.Pack(Iocb, null);
Trace.WriteLine(string.Format("{0}", new IntPtr(nativeOverlapped)));
wsabuf = new WSABUF {buf = Marshal.AllocCoTaskMem(512), len = 512};
var result2 = WSARecv2(
socket.Handle,
ref wsabuf,
1,
out numberOfBytesRecvd,
ref flags,
nativeOverlapped,
IntPtr.Zero);
var lastError2 = result2 == -1 ? Marshal.GetLastWin32Error() : 0;
var data = @"GET / HTTP/1.1
Host: localhost
Connection: close
".ToArraySegment();
SocketError err;
socket.BeginSend(
data.Array,
data.Offset,
data.Count,
SocketFlags.None,
out err,
ar =>
{
socket.EndSend(ar);
socket.Shutdown(SocketShutdown.Send);
},
null);
}
}
else
{
Console.WriteLine("Known input. Enter exit to exit.");
}
}
}
unsafe private PipeStreamAsyncResult BeginWriteCore(byte[] buffer, int offset, int count,
AsyncCallback callback, Object state)
{
Debug.Assert(_handle != null, "_handle is null");
Debug.Assert(!_handle.IsClosed, "_handle is closed");
Debug.Assert(CanWrite, "can't write");
Debug.Assert(buffer != null, "buffer == null");
Debug.Assert(_isAsync, "BeginWriteCore doesn't work on synchronous file streams!");
Debug.Assert(offset >= 0, "offset is negative");
Debug.Assert(count >= 0, "count is negative");
// Create and store async stream class library specific data in the async result
PipeStreamAsyncResult asyncResult = new PipeStreamAsyncResult();
asyncResult._userCallback = callback;
asyncResult._userStateObject = state;
asyncResult._isWrite = true;
asyncResult._handle = _handle;
// fixed doesn't work well with zero length arrays. Set the zero-byte flag in case
// caller needs to do any cleanup
if (buffer.Length == 0)
{
//intOverlapped->InternalLow = IntPtr.Zero;
// EndRead will free the Overlapped struct
asyncResult.CallUserCallback();
}
else
{
// For Synchronous IO, I could go with either a userCallback and using the managed
// Monitor class, or I could create a handle and wait on it.
ManualResetEvent waitHandle = new ManualResetEvent(false);
asyncResult._waitHandle = waitHandle;
// Create a managed overlapped class; set the file offsets later
Overlapped overlapped = new Overlapped();
overlapped.OffsetLow = 0;
overlapped.OffsetHigh = 0;
overlapped.AsyncResult = asyncResult;
// Pack the Overlapped class, and store it in the async result
NativeOverlapped* intOverlapped = overlapped.Pack(s_IOCallback, buffer);
asyncResult._overlapped = intOverlapped;
int errorCode = 0;
// Queue an async WriteFile operation and pass in a packed overlapped
int r = WriteFileNative(_handle, buffer, offset, count, intOverlapped, out errorCode);
// WriteFile, the OS version, will return 0 on failure, but this WriteFileNative
// wrapper returns -1. This will return the following:
// - On error, r==-1.
// - On async requests that are still pending, r==-1 w/ hr==ERROR_IO_PENDING
// - On async requests that completed sequentially, r==0
//
// You will NEVER RELIABLY be able to get the number of buffer written back from this
// call when using overlapped structures! You must not pass in a non-null
// lpNumBytesWritten to WriteFile when using overlapped structures! This is by design
// NT behavior.
if (r == -1 && errorCode != Interop.ERROR_IO_PENDING)
{
// Clean up
if (intOverlapped != null) Overlapped.Free(intOverlapped);
WinIOError(errorCode);
}
ReadWriteAsyncParams readWriteParams = state as ReadWriteAsyncParams;
if (readWriteParams != null)
{
if (readWriteParams.CancellationHelper != null)
{
readWriteParams.CancellationHelper.AllowCancellation(_handle, intOverlapped);
}
}
}
return asyncResult;
}
public unsafe IAsyncResult BeginWaitForConnection(AsyncCallback callback, Object state) {
CheckConnectOperationsServer();
if (!IsAsync) {
throw new InvalidOperationException(SR.GetString(SR.InvalidOperation_PipeNotAsync));
}
// Create and store async stream class library specific data in the
// async result
PipeAsyncResult asyncResult = new PipeAsyncResult();
asyncResult._handle = InternalHandle;
asyncResult._userCallback = callback;
asyncResult._userStateObject = state;
IOCancellationHelper cancellationHelper = state as IOCancellationHelper;
// Create wait handle and store in async result
ManualResetEvent waitHandle = new ManualResetEvent(false);
asyncResult._waitHandle = waitHandle;
// Create a managed overlapped class
// We will set the file offsets later
Overlapped overlapped = new Overlapped(0, 0, IntPtr.Zero, asyncResult);
// Pack the Overlapped class, and store it in the async result
NativeOverlapped* intOverlapped = overlapped.Pack(WaitForConnectionCallback, null);
asyncResult._overlapped = intOverlapped;
if (!UnsafeNativeMethods.ConnectNamedPipe(InternalHandle, intOverlapped)) {
int errorCode = Marshal.GetLastWin32Error();
if (errorCode == UnsafeNativeMethods.ERROR_IO_PENDING) {
if (cancellationHelper != null) {
cancellationHelper.AllowCancellation(InternalHandle, intOverlapped);
}
return asyncResult;
}
// WaitForConnectionCallback will not be called becasue we completed synchronously.
// Either the pipe is already connected, or there was an error. Unpin and free the overlapped again.
Overlapped.Free(intOverlapped);
asyncResult._overlapped = null;
// Did the client already connect to us?
if (errorCode == UnsafeNativeMethods.ERROR_PIPE_CONNECTED) {
if (State == PipeState.Connected) {
throw new InvalidOperationException(SR.GetString(SR.InvalidOperation_PipeAlreadyConnected));
}
asyncResult.CallUserCallback();
return asyncResult;
}
__Error.WinIOError(errorCode, String.Empty);
}
// will set state to Connected when EndWait is called
if (cancellationHelper != null) {
cancellationHelper.AllowCancellation(InternalHandle, intOverlapped);
}
return asyncResult;
}
public unsafe void ReadOverlapped(byte[] readBuffer)
{
var completedEvent = new ManualResetEvent(false);
uint bytesRead = 0;
var inOverlapped = new Overlapped();
inOverlapped.EventHandleIntPtr = completedEvent.SafeWaitHandle.DangerousGetHandle();
NativeOverlapped* inNativeOverlapped = inOverlapped.Pack(null, null);
try
{
// send the data to the device
fixed (byte* outBuffer = readBuffer)
{
var success = false;
try
{
success = InteropKernel32.ReadFile(_readHandle,
outBuffer,
(uint)readBuffer.Length,
ref bytesRead,
inNativeOverlapped);
}
catch (ObjectDisposedException)
{
throw new Exception("File handle already closed");
}
if (!success)
{
HandleIOError(true);
CancelOverlapped(_readHandle, completedEvent);
}
}
}
finally
{
// clean up
Overlapped.Free(inNativeOverlapped);
}
}
//--------------------------------------------------------------------------
// Data Reception
//--------------------------------------------------------------------------
// http://www.beefycode.com/post/Using-Overlapped-IO-from-Managed-Code.aspx
#pragma warning disable 0618 // warning CS0618: 'System.Threading.WaitHandle.Handle' is obsolete: 'Use the SafeWaitHandle property instead.'
unsafe void ReadThread(ThreadContext ctx)
{
System.Threading.Thread.CurrentThread.Name = "USBConnection.ReadThread";
EventWaitHandle asyncReadCompleteEvent = new EventWaitHandle(false, System.Threading.EventResetMode.ManualReset);
NativeOverlapped* pNativeOverlapped = null;
byte[] rgbBuffer = new byte[64];
try {
WaitHandle[] waitHandles = new WaitHandle[2];
waitHandles[0] = asyncReadCompleteEvent;
waitHandles[1] = ctx.StopEvent;
//
// If we get unexpected errors, we stop reading; likely these are caused by a device
// in the process of disconnecting.
//
bool fStop = false;
//
while (!fStop && !ctx.StopRequest)
{
// Issue an async read
//
asyncReadCompleteEvent.Reset();
Overlapped overlapped = new Overlapped(0, 0, asyncReadCompleteEvent.Handle, null);
pNativeOverlapped = overlapped.Pack(null, rgbBuffer);
int cbRead = 0;
// Program.Trace("issuing async read: 0x{0:08X} 0x{1:08X}", new IntPtr(pNativeOverlappedWrite), this.hWinUSB);
bool fSuccess = WinUsb_ReadPipe(
this.hWinUSB,
bulkInPipe,
rgbBuffer,
rgbBuffer.Length,
out cbRead,
new IntPtr(pNativeOverlapped));
this.readThreadRunning.Set();
if (!fSuccess)
{
int err = Marshal.GetLastWin32Error();
if (err != ERROR_IO_PENDING)
{
Program.Trace("USB Read: WinUsb_ReadPipe=={0}", err);
fStop = true;
continue;
}
}
// Wait until either the async read completes or we're asked to stop
int iWait = WaitHandle.WaitAny(waitHandles);
// Process according to which event fired
switch (iWait)
{
case 0: // Async read completed
{
// Program.Trace("async read complete: 0x{0:08X} 0x{1:08X}", new IntPtr(pNativeOverlappedWrite), this.hWinUSB);
if (WinUsb_GetOverlappedResult(this.hWinUSB, new IntPtr(pNativeOverlapped), ref cbRead, System.Convert.ToByte(true)))
{
ProcessIncomingPacket(rgbBuffer, cbRead);
}
else
{
int err = Marshal.GetLastWin32Error();
Program.Trace("USB Read: WinUsb_GetOverlappedResult=={0}", err);
fStop = true;
}
//
System.Threading.Overlapped.Free(pNativeOverlapped);
pNativeOverlapped = null;
}
break;
case 1: // StopEvent
// Program.Trace("async read stop requested");
break;
// end switch
}
}
}
finally
{
// Program.Trace("async cleanup: 0x{0:08X} 0x{1:08X}", new IntPtr(pNativeOverlappedWrite), this.hWinUSB);
WinUsb_AbortPipe(this.hWinUSB, bulkInPipe);
asyncReadCompleteEvent.Close();
if (pNativeOverlapped != null)
{
System.Threading.Overlapped.Free(pNativeOverlapped);
pNativeOverlapped = null;
}
}
}
public unsafe void WriteControlOverlapped(uint controlCode, byte[] writeBuffer)
{
var completedEvent = new ManualResetEvent(false);
uint bytesReturned = 0;
var outOverlapped = new Overlapped();
outOverlapped.EventHandleIntPtr = completedEvent.SafeWaitHandle.DangerousGetHandle();
NativeOverlapped* outNativeOverlapped = outOverlapped.Pack(null, null);
try
{
fixed (byte* inBuffer = writeBuffer)
{
var success = false;
try
{
success = InteropKernel32.DeviceIoControl(_writeHandle,
controlCode,
inBuffer,
writeBuffer == null ? 0 : (uint)writeBuffer.Length,
null,
0,
ref bytesReturned,
outNativeOverlapped);
}
catch (ObjectDisposedException)
{
throw new Exception("File handle already closed");
}
if (!success)
{
HandleIOError(true);
CancelOverlapped(_writeHandle, completedEvent);
}
}
}
finally
{
Overlapped.Free(outNativeOverlapped);
}
}
//--------------------------------------------------------------------------
// Data reception
//--------------------------------------------------------------------------
unsafe void ReadThread(ThreadContext ctx)
{
System.Threading.Thread.CurrentThread.Name = "BluetoothConnection.ReadThread";
EventWaitHandle asyncReadCompleteEvent = new EventWaitHandle(false, System.Threading.EventResetMode.ManualReset);
NativeOverlapped* pNativeOverlapped = null;
byte[] rgbBuffer = new byte[64];
try {
WaitHandle[] waitHandles = new WaitHandle[2];
waitHandles[0] = asyncReadCompleteEvent;
waitHandles[1] = ctx.StopEvent;
//
while (!ctx.StopRequest)
{
// Issue an async read
//
asyncReadCompleteEvent.Reset();
Overlapped overlapped = new Overlapped(0, 0, asyncReadCompleteEvent.SafeWaitHandle.DangerousGetHandle(), null);
pNativeOverlapped = overlapped.Pack(null, rgbBuffer);
int cbRead = 0;
bool fSuccess = ReadFile(this.hSerialPort, rgbBuffer, rgbBuffer.Length, out cbRead, new IntPtr(pNativeOverlapped));
readThreadRunning.Set();
if (!fSuccess)
{
int err = Marshal.GetLastWin32Error();
if (err != ERROR_IO_PENDING)
ThrowWin32Error(err);
}
// Wait until either the async read completes or we're asked to stop
int iWait = WaitHandle.WaitAny(waitHandles);
// Process according to which event fired
switch (iWait)
{
case 0: // Async read completed
{
ThrowIfFail(GetOverlappedResult(this.hSerialPort, new IntPtr(pNativeOverlapped), ref cbRead, System.Convert.ToByte(true)));
// Program.Trace("async read complete: 0x{0:08X} 0x{1:08X} cb={2}", new IntPtr(pNativeOverlapped), this.hSerialPort, cbRead);
// Record the new data and process any packets that are now complete
this.RecordIncomingData(rgbBuffer, cbRead);
ProcessPacketIfPossible();
System.Threading.Overlapped.Free(pNativeOverlapped);
pNativeOverlapped = null;
}
break;
case 1: // StopEvent
break;
// end switch
}
}
}
finally
{
CancelIo(this.hSerialPort);
asyncReadCompleteEvent.Close();
if (pNativeOverlapped != null)
{
System.Threading.Overlapped.Free(pNativeOverlapped);
pNativeOverlapped = null;
}
}
}
public unsafe void WriteOverlapped(byte[] writeBuffer)
{
var completedEvent = new ManualResetEvent(false);
uint bytesWritten = 0;
var outOverlapped = new Overlapped();
outOverlapped.EventHandleIntPtr = completedEvent.SafeWaitHandle.DangerousGetHandle();
NativeOverlapped* outNativeOverlapped = outOverlapped.Pack(null, null);
try
{
// send the data to the device
fixed (byte* inBuffer = writeBuffer)
{
var success = false;
try
{
success = InteropKernel32.WriteFile(_writeHandle,
inBuffer,
(uint)writeBuffer.Length,
ref bytesWritten,
outNativeOverlapped);
}
catch (ObjectDisposedException)
{
throw new Exception("File handle already closed");
}
if (!success)
{
HandleIOError(true);
CancelOverlapped(_writeHandle, completedEvent);
}
}
}
finally
{
Overlapped.Free(outNativeOverlapped);
}
}
public bool Read(long pageNumber, byte* buffer, int count)
{
if (_readHandle == null)
{
_readHandle = Win32NativeFileMethods.CreateFile(_filename,
Win32NativeFileAccess.GenericRead,
Win32NativeFileShare.Write | Win32NativeFileShare.Read | Win32NativeFileShare.Delete,
IntPtr.Zero,
Win32NativeFileCreationDisposition.OpenExisting,
Win32NativeFileAttributes.Normal,
IntPtr.Zero);
}
long position = pageNumber*AbstractPager.PageSize;
var overlapped = new Overlapped((int) (position & 0xffffffff), (int) (position >> 32), IntPtr.Zero, null);
NativeOverlapped* nativeOverlapped = overlapped.Pack(null, null);
try
{
while (count > 0)
{
int read;
if (Win32NativeFileMethods.ReadFile(_readHandle, buffer, count, out read, nativeOverlapped) == false)
{
int lastWin32Error = Marshal.GetLastWin32Error();
if (lastWin32Error == ErrorHandleEof)
return false;
throw new Win32Exception(lastWin32Error);
}
count -= read;
buffer += read;
position += read;
nativeOverlapped->OffsetLow = (int) (position & 0xffffffff);
nativeOverlapped->OffsetHigh = (int) (position >> 32);
}
return true;
}
finally
{
Overlapped.Free(nativeOverlapped);
}
}
private unsafe void Monitor(byte[] buffer) {
if (!enabled || IsHandleInvalid) {
return;
}
Overlapped overlapped = new Overlapped();
if (buffer == null) {
try {
buffer = new byte[internalBufferSize];
}
catch (OutOfMemoryException) {
throw new OutOfMemoryException(SR.GetString(SR.BufferSizeTooLarge, internalBufferSize.ToString(CultureInfo.CurrentCulture)));
}
}
// Pass "session" counter to callback:
FSWAsyncResult asyncResult = new FSWAsyncResult();
asyncResult.session = currentSession;
asyncResult.buffer = buffer;
// Pack overlapped. The buffer will be pinned by Overlapped:
overlapped.AsyncResult = asyncResult;
NativeOverlapped* overlappedPointer = overlapped.Pack(new IOCompletionCallback(this.CompletionStatusChanged), buffer);
// Can now call OS:
int size;
bool ok = false;
try {
// There could be a ---- in user code between calling StopRaisingEvents (where we close the handle)
// and when we get here from CompletionStatusChanged.
// We might need to take a lock to prevent ---- absolutely, instead just catch
// ObjectDisposedException from SafeHandle in case it is disposed
if (!IsHandleInvalid) {
// An interrupt is possible here
fixed (byte * buffPtr = buffer) {
ok = UnsafeNativeMethods.ReadDirectoryChangesW(directoryHandle,
new HandleRef(this, (IntPtr) buffPtr),
internalBufferSize,
includeSubdirectories ? 1 : 0,
(int) notifyFilters,
out size,
overlappedPointer,
NativeMethods.NullHandleRef);
}
}
} catch (ObjectDisposedException ) { //Ignore
Debug.Assert(IsHandleInvalid, "ObjectDisposedException from something other than SafeHandle?");
} catch (ArgumentNullException ) { //Ignore
Debug.Assert(IsHandleInvalid, "ArgumentNullException from something other than SafeHandle?");
} finally {
if (! ok) {
Overlapped.Free(overlappedPointer);
// If the handle was for some reason changed or closed during this call, then don't throw an
// exception. Else, it's a valid error.
if (!IsHandleInvalid) {
OnError(new ErrorEventArgs(new Win32Exception()));
}
}
}
}
public void ControlTransferOverlapped(byte requestType, byte request, ushort value,
ushort index, ushort length, byte[] data, WinUSBAsyncResult result)
{
uint bytesReturned = 0;
NativeInterface.WINUSB_SETUP_PACKET setupPacket;
setupPacket.RequestType = requestType;
setupPacket.Request = request;
setupPacket.Value = value;
setupPacket.Index = index;
setupPacket.Length = length;
Overlapped overlapped = new Overlapped();
overlapped.AsyncResult = result;
unsafe
{
NativeOverlapped* pOverlapped = null;
pOverlapped = overlapped.Pack(_PipeIOCallback, data);
bool success = NativeInterface.WinUsb_ControlTransfer(_winUsbHandle, setupPacket,
data, length, ref bytesReturned, pOverlapped);
_HandleOverlappedAPI(success, "Asynchronous control transfer on WinUSB device failed.",
pOverlapped, result, (int)bytesReturned);
}
}
internal void Pack(object pinnedObjects)
{
if (this.nativeOverlapped != null)
{
// If we reach this condition, we have a bug in a derived AsyncResult class.
// It attempted to initiate a new async I/O operation before the previous
// one completed. This is a fatal condition, so we cannot continue execution.
DiagnosticUtility.FailFast("Must allow previous I/O to complete before packing");
}
GC.ReRegisterForFinalize(this);
Overlapped overlapped = new Overlapped(0, 0, IntPtr.Zero, this);
if (this.callback == null)
{
this.nativeOverlapped = overlapped.UnsafePack(
IOCompletionCallback,
pinnedObjects);
}
else
{
this.nativeOverlapped = overlapped.Pack(
IOCompletionCallback,
pinnedObjects);
}
}