Code:
/ FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / Net / System / Net / Sockets / _TransmitFileOverlappedAsyncResult.cs / 1 / _TransmitFileOverlappedAsyncResult.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Net.Sockets { using System; using System.Net; using System.IO; using System.Runtime.InteropServices; using System.Threading; using Microsoft.Win32; // // OverlappedAsyncResult - used to take care of storage for async Socket operation // from the BeginSend, BeginSendTo, BeginReceive, BeginReceiveFrom calls. // internal class TransmitFileOverlappedAsyncResult : BaseOverlappedAsyncResult { // // internal class members // private FileStream m_fileStream; private TransmitFileOptions m_flags; private TransmitFileBuffers m_buffers; // 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 TransmitFileOverlappedAsyncResult(Socket socket, Object asyncState, AsyncCallback asyncCallback) : base(socket, asyncState, asyncCallback) { } internal TransmitFileOverlappedAsyncResult(Socket socket):base(socket){ } // // 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[] preBuffer, byte[] postBuffer, FileStream fileStream, TransmitFileOptions flags, bool sync) { // // fill in flags if we use it. // m_fileStream = fileStream; m_flags = flags; // // Fill in Buffer Array structure that will be used for our send/recv Buffer // m_buffers = null; int buffsNumber = 0; if (preBuffer != null && preBuffer.Length>0) ++buffsNumber; if (postBuffer != null && postBuffer.Length>0) ++buffsNumber; object[] objectsToPin = null; if (buffsNumber != 0) { ++buffsNumber; objectsToPin = new object[buffsNumber]; m_buffers = new TransmitFileBuffers(); objectsToPin[--buffsNumber] = m_buffers; if (preBuffer != null && preBuffer.Length>0) { m_buffers.preBufferLength = preBuffer.Length; objectsToPin[--buffsNumber] = preBuffer; } if (postBuffer != null && postBuffer.Length>0) { m_buffers.postBufferLength = postBuffer.Length; objectsToPin[--buffsNumber] = postBuffer; } if (sync) { base.PinUnmanagedObjects(objectsToPin); } else { base.SetUnmanagedStructures(objectsToPin); } if (preBuffer != null && preBuffer.Length > 0) { m_buffers.preBuffer = Marshal.UnsafeAddrOfPinnedArrayElement(preBuffer, 0); } if (postBuffer != null && postBuffer.Length > 0) { m_buffers.postBuffer = Marshal.UnsafeAddrOfPinnedArrayElement(postBuffer, 0); } } else if (!sync) { base.SetUnmanagedStructures(null); } } // SetUnmanagedStructures() internal void SetUnmanagedStructures(byte[] preBuffer, byte[] postBuffer, FileStream fileStream, TransmitFileOptions flags, ref OverlappedCache overlappedCache) { SetupCache(ref overlappedCache); SetUnmanagedStructures(preBuffer, postBuffer, fileStream, flags, false); } // Utility cleanup routine. Frees pinned and unmanged memory. // protected override void ForceReleaseUnmanagedStructures() { if (m_fileStream != null ) { m_fileStream.Close(); m_fileStream = null; } // // clenaup base class // base.ForceReleaseUnmanagedStructures(); } // CleanupUnmanagedStructures() internal void SyncReleaseUnmanagedStructures() { ForceReleaseUnmanagedStructures(); } internal TransmitFileBuffers TransmitFileBuffers{ get{ return m_buffers; } } internal TransmitFileOptions Flags{ get{ return m_flags; } } }; // class OverlappedAsyncResult } // namespace System.Net.Sockets
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- SchemaImporter.cs
- LinkButton.cs
- OledbConnectionStringbuilder.cs
- SynchronizationLockException.cs
- NamedPermissionSet.cs
- ToggleButtonAutomationPeer.cs
- WebPartTransformerAttribute.cs
- MouseDevice.cs
- SafeProcessHandle.cs
- WebServicesSection.cs
- RuleConditionDialog.Designer.cs
- ManipulationVelocities.cs
- RIPEMD160Managed.cs
- RelationshipManager.cs
- GridItem.cs
- CodeMemberEvent.cs
- ASCIIEncoding.cs
- MenuItemBinding.cs
- Int64.cs
- TextParagraphCache.cs
- MenuItemStyleCollection.cs
- DecoderNLS.cs
- ChangeConflicts.cs
- XsltCompileContext.cs
- XPathDocument.cs
- CopyAttributesAction.cs
- HostingEnvironmentWrapper.cs
- DoubleLinkList.cs
- ToolStripDropTargetManager.cs
- SynchronizationLockException.cs
- Authorization.cs
- DBNull.cs
- PagesChangedEventArgs.cs
- ListMarkerLine.cs
- SqlCommand.cs
- RayHitTestParameters.cs
- EDesignUtil.cs
- ConfigurationPermission.cs
- TransformCollection.cs
- WindowProviderWrapper.cs
- SelectionRange.cs
- hresults.cs
- XmlSerializationReader.cs
- AssemblyBuilderData.cs
- MetadataUtil.cs
- EnumMember.cs
- ListManagerBindingsCollection.cs
- SoapExtensionImporter.cs
- adornercollection.cs
- BitmapEffectOutputConnector.cs
- WorkflowMessageEventArgs.cs
- UnknownBitmapEncoder.cs
- DataBoundControl.cs
- ApplicationException.cs
- BaseAddressElementCollection.cs
- Util.cs
- RuleSetReference.cs
- SmtpReplyReader.cs
- TreeNodeCollection.cs
- TypeLibConverter.cs
- KnowledgeBase.cs
- InvokeProviderWrapper.cs
- ModifierKeysConverter.cs
- FloatUtil.cs
- DataGridLength.cs
- BevelBitmapEffect.cs
- PeerEndPoint.cs
- XmlSerializerOperationFormatter.cs
- TextEditor.cs
- CodeAttributeDeclarationCollection.cs
- AdvancedBindingEditor.cs
- AsyncDataRequest.cs
- ContentType.cs
- KeyConverter.cs
- Solver.cs
- OLEDB_Util.cs
- ObjectSerializerFactory.cs
- TimeSpanMinutesOrInfiniteConverter.cs
- WebConvert.cs
- AssertFilter.cs
- HighContrastHelper.cs
- LineBreakRecord.cs
- FixedDSBuilder.cs
- PrimaryKeyTypeConverter.cs
- ServiceProviders.cs
- Mapping.cs
- Stopwatch.cs
- NetStream.cs
- LexicalChunk.cs
- BooleanFunctions.cs
- XmlSchemaAppInfo.cs
- XPathParser.cs
- SQLConvert.cs
- ApplicationActivator.cs
- StringValueSerializer.cs
- EdmValidator.cs
- HttpException.cs
- PropertySegmentSerializer.cs
- TextElementEditingBehaviorAttribute.cs
- Typography.cs