Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / whidbey / netfxsp / ndp / fx / src / Net / System / Net / SecureProtocols / _HelperAsyncResults.cs / 1 / _HelperAsyncResults.cs
/*++ Copyright (c) 2000 Microsoft Corporation Module Name: _HelperAsyncResults.cs Abstract: These are simple helpers to keep track of protocol IO requests Author: Alexei Vopilov Aug 18 2003 Revision History: --*/ namespace System.Net { using System; using System.IO; using System.Threading; // // Simply said whenever we want to wrap a user IO request we need // to preserve the original request buffer & sizes. // // Usually we would return this class as IAsyncResult to application // internal class BufferAsyncResult: LazyAsyncResult { public byte[] Buffer; public BufferOffsetSize[] Buffers; public int Offset; public int Count; public bool IsWrite; // MultipleWriteOnly // public BufferAsyncResult(object asyncObject, BufferOffsetSize[] buffers, object asyncState, AsyncCallback asyncCallback) :base (asyncObject, asyncState, asyncCallback) { Buffers = buffers; IsWrite = true; } public BufferAsyncResult(object asyncObject, byte[] buffer, int offset, int count, object asyncState, AsyncCallback asyncCallback) :this(asyncObject, buffer, offset, count, false, asyncState, asyncCallback) { } public BufferAsyncResult(object asyncObject, byte[] buffer, int offset, int count, bool isWrite, object asyncState, AsyncCallback asyncCallback) :base (asyncObject, asyncState, asyncCallback) { Buffer = buffer; Offset = offset; Count = count; IsWrite = isWrite; } } // The callback type used with below AsyncProtocolRequest class internal delegate void AsyncProtocolCallback(AsyncProtocolRequest asyncRequest); // // The class mimics LazyAsyncResult although it does not need to be thread safe nor it does need an Event. // Usually we would use this class to implement iterative protocol logic // // The beauty is that // 1) it can be reused for handshake-like or multi-IO request protocols // 2) it is proven to not block async IO since there is NO event handler exposed // // UserAsyncResult property is a link into original user IO request (could be a BufferAsyncResult). // When underlined protocol is done this guy gets completed // internal class AsyncProtocolRequest { #if DEBUG internal object _DebugAsyncChain; // Optionally used to track chains of async calls. #endif private AsyncProtocolCallback _Callback; private int _CompletionStatus; const int StatusNotStarted = 0; const int StatusCompleted = 1; const int StatusCheckedOnSyncCompletion = 2; public LazyAsyncResult UserAsyncResult; public int Result; // it's always about read bytes or alike public object AsyncState; // sometime it's needed to communicate additional info. // Note that AsyncObject is just a link to UserAsyncResult.AsyncObject public byte[] Buffer; // temp buffer reused by a protocol. public int Offset; // ditto public int Count; // ditto // // public AsyncProtocolRequest(LazyAsyncResult userAsyncResult) { GlobalLog.Assert(userAsyncResult != null, "AsyncProtocolRequest()|userAsyncResult == null"); GlobalLog.Assert(!userAsyncResult.InternalPeekCompleted, "AsyncProtocolRequest()|userAsyncResult is already completed."); UserAsyncResult = userAsyncResult; } // // public void SetNextRequest(byte[] buffer, int offset, int count, AsyncProtocolCallback callback) { if (_CompletionStatus != StatusNotStarted) throw new InternalException(); // pending op is in progress Buffer = buffer; Offset = offset; Count = count; _Callback = callback; } // // internal object AsyncObject { get { return UserAsyncResult.AsyncObject; } } // // Notify protocol so a next stage could be started // internal void CompleteRequest(int result) { Result = result; int status = Interlocked.Exchange(ref _CompletionStatus, StatusCompleted); if (status == StatusCompleted) throw new InternalException(); // only allow one call if (status == StatusCheckedOnSyncCompletion) { _CompletionStatus = StatusNotStarted; _Callback(this); } } // public bool MustCompleteSynchronously { get { int status = Interlocked.Exchange(ref _CompletionStatus, StatusCheckedOnSyncCompletion); if (status == StatusCheckedOnSyncCompletion) throw new InternalException(); // only allow one call if (status == StatusCompleted) { _CompletionStatus = StatusNotStarted; return true; } return false; } } // // NB: This will abandon _Callback and directly notify UserAsyncResult. // internal void CompleteWithError(Exception e) { UserAsyncResult.InvokeCallback(e); } // internal void CompleteUser() { UserAsyncResult.InvokeCallback(); } // internal void CompleteUser(object userResult) { UserAsyncResult.InvokeCallback(userResult); } // internal bool IsUserCompleted { get {return UserAsyncResult.InternalPeekCompleted;} } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved. /*++ Copyright (c) 2000 Microsoft Corporation Module Name: _HelperAsyncResults.cs Abstract: These are simple helpers to keep track of protocol IO requests Author: Alexei Vopilov Aug 18 2003 Revision History: --*/ namespace System.Net { using System; using System.IO; using System.Threading; // // Simply said whenever we want to wrap a user IO request we need // to preserve the original request buffer & sizes. // // Usually we would return this class as IAsyncResult to application // internal class BufferAsyncResult: LazyAsyncResult { public byte[] Buffer; public BufferOffsetSize[] Buffers; public int Offset; public int Count; public bool IsWrite; // MultipleWriteOnly // public BufferAsyncResult(object asyncObject, BufferOffsetSize[] buffers, object asyncState, AsyncCallback asyncCallback) :base (asyncObject, asyncState, asyncCallback) { Buffers = buffers; IsWrite = true; } public BufferAsyncResult(object asyncObject, byte[] buffer, int offset, int count, object asyncState, AsyncCallback asyncCallback) :this(asyncObject, buffer, offset, count, false, asyncState, asyncCallback) { } public BufferAsyncResult(object asyncObject, byte[] buffer, int offset, int count, bool isWrite, object asyncState, AsyncCallback asyncCallback) :base (asyncObject, asyncState, asyncCallback) { Buffer = buffer; Offset = offset; Count = count; IsWrite = isWrite; } } // The callback type used with below AsyncProtocolRequest class internal delegate void AsyncProtocolCallback(AsyncProtocolRequest asyncRequest); // // The class mimics LazyAsyncResult although it does not need to be thread safe nor it does need an Event. // Usually we would use this class to implement iterative protocol logic // // The beauty is that // 1) it can be reused for handshake-like or multi-IO request protocols // 2) it is proven to not block async IO since there is NO event handler exposed // // UserAsyncResult property is a link into original user IO request (could be a BufferAsyncResult). // When underlined protocol is done this guy gets completed // internal class AsyncProtocolRequest { #if DEBUG internal object _DebugAsyncChain; // Optionally used to track chains of async calls. #endif private AsyncProtocolCallback _Callback; private int _CompletionStatus; const int StatusNotStarted = 0; const int StatusCompleted = 1; const int StatusCheckedOnSyncCompletion = 2; public LazyAsyncResult UserAsyncResult; public int Result; // it's always about read bytes or alike public object AsyncState; // sometime it's needed to communicate additional info. // Note that AsyncObject is just a link to UserAsyncResult.AsyncObject public byte[] Buffer; // temp buffer reused by a protocol. public int Offset; // ditto public int Count; // ditto // // public AsyncProtocolRequest(LazyAsyncResult userAsyncResult) { GlobalLog.Assert(userAsyncResult != null, "AsyncProtocolRequest()|userAsyncResult == null"); GlobalLog.Assert(!userAsyncResult.InternalPeekCompleted, "AsyncProtocolRequest()|userAsyncResult is already completed."); UserAsyncResult = userAsyncResult; } // // public void SetNextRequest(byte[] buffer, int offset, int count, AsyncProtocolCallback callback) { if (_CompletionStatus != StatusNotStarted) throw new InternalException(); // pending op is in progress Buffer = buffer; Offset = offset; Count = count; _Callback = callback; } // // internal object AsyncObject { get { return UserAsyncResult.AsyncObject; } } // // Notify protocol so a next stage could be started // internal void CompleteRequest(int result) { Result = result; int status = Interlocked.Exchange(ref _CompletionStatus, StatusCompleted); if (status == StatusCompleted) throw new InternalException(); // only allow one call if (status == StatusCheckedOnSyncCompletion) { _CompletionStatus = StatusNotStarted; _Callback(this); } } // public bool MustCompleteSynchronously { get { int status = Interlocked.Exchange(ref _CompletionStatus, StatusCheckedOnSyncCompletion); if (status == StatusCheckedOnSyncCompletion) throw new InternalException(); // only allow one call if (status == StatusCompleted) { _CompletionStatus = StatusNotStarted; return true; } return false; } } // // NB: This will abandon _Callback and directly notify UserAsyncResult. // internal void CompleteWithError(Exception e) { UserAsyncResult.InvokeCallback(e); } // internal void CompleteUser() { UserAsyncResult.InvokeCallback(); } // internal void CompleteUser(object userResult) { UserAsyncResult.InvokeCallback(userResult); } // internal bool IsUserCompleted { get {return UserAsyncResult.InternalPeekCompleted;} } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- DefaultShape.cs
- X509Certificate2Collection.cs
- SchemaElementLookUpTable.cs
- ObjectDataSource.cs
- FixUpCollection.cs
- BrowserCapabilitiesCompiler.cs
- ConstraintEnumerator.cs
- EdmProperty.cs
- TreeNodeStyleCollectionEditor.cs
- CalendarDay.cs
- ArrangedElementCollection.cs
- ErrorRuntimeConfig.cs
- DataServiceConfiguration.cs
- MaskPropertyEditor.cs
- ScrollContentPresenter.cs
- Line.cs
- QuestionEventArgs.cs
- IntranetCredentialPolicy.cs
- PropertyPath.cs
- LoginUtil.cs
- Axis.cs
- NetMsmqSecurityMode.cs
- NetworkCredential.cs
- ArithmeticException.cs
- MatrixAnimationBase.cs
- ISAPIApplicationHost.cs
- Utility.cs
- PeerNameRecord.cs
- SingleConverter.cs
- BamlTreeUpdater.cs
- SiteMapNodeItem.cs
- HierarchicalDataSourceDesigner.cs
- PageParser.cs
- GPPOINT.cs
- X509SecurityTokenAuthenticator.cs
- XamlSerializer.cs
- PartialCachingControl.cs
- ResXFileRef.cs
- KeyValuePairs.cs
- DataErrorValidationRule.cs
- Rotation3DAnimationBase.cs
- BaseTreeIterator.cs
- SortedList.cs
- DetailsViewDeletedEventArgs.cs
- ProxyHelper.cs
- SecureUICommand.cs
- PageRequestManager.cs
- SystemWebSectionGroup.cs
- JpegBitmapDecoder.cs
- DebugControllerThread.cs
- DBBindings.cs
- DBCommandBuilder.cs
- CaseInsensitiveComparer.cs
- XmlSerializationWriter.cs
- RegionIterator.cs
- WebPartDescriptionCollection.cs
- XamlWriter.cs
- TailCallAnalyzer.cs
- DictionarySectionHandler.cs
- ListViewDeletedEventArgs.cs
- SiteMembershipCondition.cs
- Parser.cs
- CodeSnippetCompileUnit.cs
- BinHexEncoder.cs
- ValidatedControlConverter.cs
- SelectionPattern.cs
- DBCommandBuilder.cs
- NetCodeGroup.cs
- TableDesigner.cs
- ColumnCollection.cs
- SqlNode.cs
- WebPartEditorOkVerb.cs
- UDPClient.cs
- OleDbMetaDataFactory.cs
- OrderByQueryOptionExpression.cs
- GeneralTransformCollection.cs
- formatter.cs
- WebPartConnectionsEventArgs.cs
- IgnoreDataMemberAttribute.cs
- AdjustableArrowCap.cs
- DropShadowEffect.cs
- DbConnectionPoolGroupProviderInfo.cs
- CompositeFontInfo.cs
- AuthorizationBehavior.cs
- PageBreakRecord.cs
- _AutoWebProxyScriptEngine.cs
- BitmapEffectCollection.cs
- StringFreezingAttribute.cs
- SocketException.cs
- Method.cs
- XPathNodePointer.cs
- XmlSchemaRedefine.cs
- DetailsViewModeEventArgs.cs
- FloaterParagraph.cs
- relpropertyhelper.cs
- BaseTemplateBuildProvider.cs
- DataTableMappingCollection.cs
- FileUpload.cs
- DataDocumentXPathNavigator.cs
- XMLDiffLoader.cs