Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Net / System / Net / Sockets / _OverlappedAsyncResult.cs / 1305376 / _OverlappedAsyncResult.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Net.Sockets { using System; using System.Net; using System.Runtime.InteropServices; using System.Threading; using Microsoft.Win32; using System.Collections.Generic; // // OverlappedAsyncResult - used to take care of storage for async Socket operation // from the BeginSend, BeginSendTo, BeginReceive, BeginReceiveFrom calls. // internal class OverlappedAsyncResult: BaseOverlappedAsyncResult { // // internal class members // private SocketAddress m_SocketAddress; private SocketAddress m_SocketAddressOriginal; // needed for partial BeginReceiveFrom/EndReceiveFrom completion // These two are used only as alternatives internal WSABuffer m_SingleBuffer; internal WSABuffer[] m_WSABuffers; // // the following two will be used only on WinNT to enable completion ports // // // Constructor. We take in the socket that's creating us, the caller's // state object, and the buffer on which the I/O will be performed. // We save the socket and state, pin the callers's buffer, and allocate // an event for the WaitHandle. // internal OverlappedAsyncResult(Socket socket, Object asyncState, AsyncCallback asyncCallback) : base(socket, asyncState, asyncCallback) { } // internal IntPtr GetSocketAddressPtr() { return Marshal.UnsafeAddrOfPinnedArrayElement(m_SocketAddress.m_Buffer, 0); } // internal IntPtr GetSocketAddressSizePtr() { return Marshal.UnsafeAddrOfPinnedArrayElement(m_SocketAddress.m_Buffer, m_SocketAddress.GetAddressSizeOffset()); } // internal SocketAddress SocketAddress { get { return m_SocketAddress; } } // internal SocketAddress SocketAddressOriginal { get { return m_SocketAddressOriginal; } set { m_SocketAddressOriginal = value; } } // // SetUnmanagedStructures - // Fills in Overlapped Structures used in an Async Overlapped Winsock call // these calls are outside the runtime and are unmanaged code, so we need // to prepare specific structures and ints that lie in unmanaged memory // since the Overlapped calls can be Async // internal void SetUnmanagedStructures(byte[] buffer, int offset, int size, SocketAddress socketAddress, bool pinSocketAddress) { // // Fill in Buffer Array structure that will be used for our send/recv Buffer // m_SocketAddress = socketAddress; if (pinSocketAddress && m_SocketAddress != null) { object[] objectsToPin = null; objectsToPin = new object[2]; objectsToPin[0] = buffer; m_SocketAddress.CopyAddressSizeIntoBuffer(); objectsToPin[1] = m_SocketAddress.m_Buffer; base.SetUnmanagedStructures(objectsToPin); } else { base.SetUnmanagedStructures(buffer); } m_SingleBuffer.Length = size; m_SingleBuffer.Pointer = Marshal.UnsafeAddrOfPinnedArrayElement(buffer, offset); } internal void SetUnmanagedStructures(byte[] buffer, int offset, int size, SocketAddress socketAddress, bool pinSocketAddress, ref OverlappedCache overlappedCache) { SetupCache(ref overlappedCache); SetUnmanagedStructures(buffer, offset, size, socketAddress, pinSocketAddress); } internal void SetUnmanagedStructures(BufferOffsetSize[] buffers) { // // Fill in Buffer Array structure that will be used for our send/recv Buffer // m_WSABuffers = new WSABuffer[buffers.Length]; object[] objectsToPin = new object[buffers.Length]; for (int i = 0; i < buffers.Length; i++) objectsToPin[i] = buffers[i].Buffer; // has to be called now to pin memory base.SetUnmanagedStructures(objectsToPin); for (int i = 0; i < buffers.Length; i++) { m_WSABuffers[i].Length = buffers[i].Size; m_WSABuffers[i].Pointer = Marshal.UnsafeAddrOfPinnedArrayElement(buffers[i].Buffer, buffers[i].Offset); } } internal void SetUnmanagedStructures(BufferOffsetSize[] buffers, ref OverlappedCache overlappedCache) { SetupCache(ref overlappedCache); SetUnmanagedStructures(buffers); } internal void SetUnmanagedStructures(IList> buffers) { // Fill in Buffer Array structure that will be used for our send/recv Buffer // //make sure we don't let the app mess up the buffer array enough to cause //corruption. int count = buffers.Count; ArraySegment [] buffersCopy = new ArraySegment [count]; for (int i=0;i > buffers, ref OverlappedCache overlappedCache) { SetupCache(ref overlappedCache); SetUnmanagedStructures(buffers); } // // This method is called after an asynchronous call is made for the user, // it checks and acts accordingly if the IO: // 1) completed synchronously. // 2) was pended. // 3) failed. // internal override object PostCompletion(int numBytes) { if (ErrorCode == 0) { if(Logging.On)LogBuffer(numBytes); } return (int)numBytes; } void LogBuffer(int size) { GlobalLog.Assert(Logging.On, "OverlappedAsyncResult#{0}::LogBuffer()|Logging is off!", ValidationHelper.HashString(this)); if (size > -1) { if (m_WSABuffers != null) { foreach (WSABuffer wsaBuffer in m_WSABuffers) { Logging.Dump(Logging.Sockets, AsyncObject, "PostCompletion", wsaBuffer.Pointer, Math.Min(wsaBuffer.Length, size)); if ((size -= wsaBuffer.Length) <=0) break; } } else { Logging.Dump(Logging.Sockets, AsyncObject, "PostCompletion", m_SingleBuffer.Pointer, Math.Min(m_SingleBuffer.Length, size)); } } } }; // class OverlappedAsyncResult } // namespace System.Net.Sockets // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- QilParameter.cs
- WorkflowOwnershipException.cs
- ThrowHelper.cs
- Matrix3DStack.cs
- CaseExpr.cs
- DataGridViewRowErrorTextNeededEventArgs.cs
- PointLightBase.cs
- ReturnType.cs
- Geometry.cs
- SystemParameters.cs
- DesignerHost.cs
- CardSpaceException.cs
- ZipIOBlockManager.cs
- AnnotationDocumentPaginator.cs
- StrongNameKeyPair.cs
- TypeToStringValueConverter.cs
- QueryPageSettingsEventArgs.cs
- XmlNamedNodeMap.cs
- IApplicationTrustManager.cs
- ProfileGroupSettingsCollection.cs
- xsdvalidator.cs
- WebServiceErrorEvent.cs
- Content.cs
- SuppressIldasmAttribute.cs
- CompositeActivityCodeGenerator.cs
- DefaultTextStore.cs
- ApplicationSecurityManager.cs
- GeometryCollection.cs
- CrossSiteScriptingValidation.cs
- DataKeyPropertyAttribute.cs
- GetImportedCardRequest.cs
- DataContractSerializerOperationFormatter.cs
- RawStylusSystemGestureInputReport.cs
- ResourceDescriptionAttribute.cs
- ArgumentNullException.cs
- PixelShader.cs
- InvokeBinder.cs
- BrowserTree.cs
- CheckBoxAutomationPeer.cs
- TabPage.cs
- TemplateManager.cs
- OdbcException.cs
- SmiEventSink_Default.cs
- XmlSubtreeReader.cs
- SecurityTokenValidationException.cs
- WorkflowInstanceExtensionCollection.cs
- UserNameSecurityTokenProvider.cs
- DataGridColumn.cs
- ActivityDesignerHighlighter.cs
- EntityFunctions.cs
- TemplateNodeContextMenu.cs
- WebPartZone.cs
- WebRequest.cs
- TextTreeTextElementNode.cs
- TrackingStringDictionary.cs
- loginstatus.cs
- OptimalTextSource.cs
- TablePattern.cs
- InstalledFontCollection.cs
- MDIWindowDialog.cs
- TypeElement.cs
- StsCommunicationException.cs
- ZoneIdentityPermission.cs
- InstanceContextMode.cs
- DocumentReferenceCollection.cs
- DriveNotFoundException.cs
- DataFormats.cs
- StaticTextPointer.cs
- GeometryHitTestParameters.cs
- Catch.cs
- SqlFileStream.cs
- Rotation3D.cs
- Graphics.cs
- SerialStream.cs
- SessionEndedEventArgs.cs
- Point.cs
- ProfileEventArgs.cs
- SQLDecimalStorage.cs
- XmlStringTable.cs
- EndpointDispatcherTable.cs
- RecipientInfo.cs
- ItemContainerGenerator.cs
- TemplateField.cs
- _WinHttpWebProxyDataBuilder.cs
- ReadOnlyPropertyMetadata.cs
- TypeBuilderInstantiation.cs
- DecimalConstantAttribute.cs
- VerbConverter.cs
- ConstraintCollection.cs
- AssemblySettingAttributes.cs
- RequestQueue.cs
- LoaderAllocator.cs
- XsltOutput.cs
- ObjRef.cs
- IndentTextWriter.cs
- XmlIncludeAttribute.cs
- LockingPersistenceProvider.cs
- FrugalMap.cs
- TemplateBindingExpressionConverter.cs
- Vector.cs