Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / whidbey / netfxsp / ndp / clr / src / BCL / System / IO / __ConsoleStream.cs / 1 / __ConsoleStream.cs
// ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== /*============================================================ ** ** Class: ConsoleStream ** ** ** Purpose: Exposes a separate Stream for Console IO and ** handles WinCE appropriately. Also keeps us from using the ** ThreadPool for all Console output. ** ** ===========================================================*/ using System; using System.Runtime.InteropServices; using System.Security; using Microsoft.Win32; using Microsoft.Win32.SafeHandles; using System.Runtime.CompilerServices; using System.Runtime.Versioning; namespace System.IO { internal sealed class __ConsoleStream : Stream { internal const int DefaultBufferSize = 128; // From winerror.h private const int ERROR_BROKEN_PIPE = 109; // ERROR_NO_DATA ("The pipe is being closed") is returned when we write to // a console that is closing. private const int ERROR_NO_DATA = 232; private SafeFileHandle _handle; private bool _canRead; private bool _canWrite; [ResourceExposure(ResourceScope.Process)] internal __ConsoleStream(SafeFileHandle handle, FileAccess access) { BCLDebug.Assert(handle != null && !handle.IsInvalid, "__ConsoleStream expects a valid handle!"); _handle = handle; _canRead = access == FileAccess.Read; _canWrite = access == FileAccess.Write; } public override bool CanRead { get { return _canRead; } } public override bool CanWrite { get { return _canWrite; } } public override bool CanSeek { get { return false; } } public override long Length { get { __Error.SeekNotSupported(); return 0; // compiler appeasement } } public override long Position { get { __Error.SeekNotSupported(); return 0; // compiler appeasement } set { __Error.SeekNotSupported(); } } protected override void Dispose(bool disposing) { // We're probably better off not closing the OS handle here. First, // we allow a program to get multiple instances of __ConsoleStreams // around the same OS handle, so closing one handle would invalidate // them all. Additionally, we want a second AppDomain to be able to // write to stdout if a second AppDomain quits. if (_handle != null) { _handle = null; } _canRead = false; _canWrite = false; base.Dispose(disposing); } public override void Flush() { if (_handle == null) __Error.FileNotOpen(); if (!CanWrite) __Error.WriteNotSupported(); } public override void SetLength(long value) { __Error.SeekNotSupported(); } [ResourceExposure(ResourceScope.None)] [ResourceConsumption(ResourceScope.Process, ResourceScope.Process)] public override int Read([In, Out] byte[] buffer, int offset, int count) { if (buffer==null) throw new ArgumentNullException("buffer"); if (offset < 0 || count < 0) throw new ArgumentOutOfRangeException((offset < 0 ? "offset" : "count"), Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum")); if (buffer.Length - offset < count) throw new ArgumentException(Environment.GetResourceString("Argument_InvalidOffLen")); if (!_canRead) __Error.ReadNotSupported(); int errorCode = 0; int result = ReadFileNative(_handle, buffer, offset, count, 0, out errorCode); if (result == -1) { __Error.WinIOError(errorCode, String.Empty); } return result; } public override long Seek(long offset, SeekOrigin origin) { __Error.SeekNotSupported(); return 0; // compiler appeasement } [ResourceExposure(ResourceScope.None)] [ResourceConsumption(ResourceScope.Process, ResourceScope.Process)] public override void Write(byte[] buffer, int offset, int count) { if (buffer==null) throw new ArgumentNullException("buffer"); if (offset < 0 || count < 0) throw new ArgumentOutOfRangeException((offset < 0 ? "offset" : "count"), Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum")); if (buffer.Length - offset < count) throw new ArgumentException(Environment.GetResourceString("Argument_InvalidOffLen")); if (!_canWrite) __Error.WriteNotSupported(); int errorCode = 0; int result = WriteFileNative(_handle, buffer, offset, count, 0, out errorCode); if (result == -1) { //BCLDebug.ConsoleError("__ConsoleStream::Write: throwing on error. Error code: "+errorCode+" 0x"+errorCode.ToString("x")+" handle: "+_handle.ToString()); __Error.WinIOError(errorCode, String.Empty); } return; } // P/Invoke wrappers for writing to and from a file, nearly identical // to the ones on FileStream. These are duplicated to save startup/hello // world working set. [ResourceExposure(ResourceScope.Process)] [ResourceConsumption(ResourceScope.Process)] private unsafe static int ReadFileNative(SafeFileHandle hFile, byte[] bytes, int offset, int count, int mustBeZero, out int errorCode) { BCLDebug.Assert(offset >= 0, "offset >= 0"); BCLDebug.Assert(count >= 0, "count >= 0"); BCLDebug.Assert(bytes != null, "bytes != null"); // Don't corrupt memory when multiple threads are erroneously writing // to this stream simultaneously. if (bytes.Length - offset < count) throw new IndexOutOfRangeException(Environment.GetResourceString("IndexOutOfRange_IORaceCondition")); // You can't use the fixed statement on an array of length 0. if (bytes.Length==0) { errorCode = 0; return 0; } int r; int numBytesRead; fixed(byte* p = bytes) { r = ReadFile(hFile, p + offset, count, out numBytesRead, Win32Native.NULL); } if (r==0) { errorCode = Marshal.GetLastWin32Error(); if (errorCode == ERROR_BROKEN_PIPE) { // A pipe into stdin was closed. Not an error, but EOF. return 0; } return -1; } else errorCode = 0; return numBytesRead; } [ResourceExposure(ResourceScope.Process)] [ResourceConsumption(ResourceScope.Process)] private static unsafe int WriteFileNative(SafeFileHandle hFile, byte[] bytes, int offset, int count, int mustBeZero, out int errorCode) { BCLDebug.Assert(offset >= 0, "offset >= 0"); BCLDebug.Assert(count >= 0, "count >= 0"); BCLDebug.Assert(bytes != null, "bytes != null"); BCLDebug.Assert(bytes.Length >= offset + count, "bytes.Length >= offset + count"); // You can't use the fixed statement on an array of length 0. if (bytes.Length==0) { errorCode = 0; return 0; } int numBytesWritten = 0; int r; fixed(byte* p = bytes) { r = WriteFile(hFile, p + offset, count, out numBytesWritten, Win32Native.NULL); } if (r==0) { errorCode = Marshal.GetLastWin32Error(); // For pipes that are closing or broken, just stop. if (errorCode==ERROR_NO_DATA || errorCode==ERROR_BROKEN_PIPE) return 0; return -1; } else { errorCode = 0; } return numBytesWritten; } // The P/Invoke declarations for ReadFile and WriteFile are here for a reason! This prevents us from loading several classes // in the trivial hello world case. [DllImport(Win32Native.KERNEL32, SetLastError=true), SuppressUnmanagedCodeSecurityAttribute] [ResourceExposure(ResourceScope.Process)] unsafe private static extern int ReadFile(SafeFileHandle handle, byte* bytes, int numBytesToRead, out int numBytesRead, IntPtr mustBeZero); [DllImport(Win32Native.KERNEL32, SetLastError=true), SuppressUnmanagedCodeSecurityAttribute] [ResourceExposure(ResourceScope.Process)] internal static unsafe extern int WriteFile(SafeFileHandle handle, byte* bytes, int numBytesToWrite, out int numBytesWritten, IntPtr mustBeZero); } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== /*============================================================ ** ** Class: ConsoleStream ** ** ** Purpose: Exposes a separate Stream for Console IO and ** handles WinCE appropriately. Also keeps us from using the ** ThreadPool for all Console output. ** ** ===========================================================*/ using System; using System.Runtime.InteropServices; using System.Security; using Microsoft.Win32; using Microsoft.Win32.SafeHandles; using System.Runtime.CompilerServices; using System.Runtime.Versioning; namespace System.IO { internal sealed class __ConsoleStream : Stream { internal const int DefaultBufferSize = 128; // From winerror.h private const int ERROR_BROKEN_PIPE = 109; // ERROR_NO_DATA ("The pipe is being closed") is returned when we write to // a console that is closing. private const int ERROR_NO_DATA = 232; private SafeFileHandle _handle; private bool _canRead; private bool _canWrite; [ResourceExposure(ResourceScope.Process)] internal __ConsoleStream(SafeFileHandle handle, FileAccess access) { BCLDebug.Assert(handle != null && !handle.IsInvalid, "__ConsoleStream expects a valid handle!"); _handle = handle; _canRead = access == FileAccess.Read; _canWrite = access == FileAccess.Write; } public override bool CanRead { get { return _canRead; } } public override bool CanWrite { get { return _canWrite; } } public override bool CanSeek { get { return false; } } public override long Length { get { __Error.SeekNotSupported(); return 0; // compiler appeasement } } public override long Position { get { __Error.SeekNotSupported(); return 0; // compiler appeasement } set { __Error.SeekNotSupported(); } } protected override void Dispose(bool disposing) { // We're probably better off not closing the OS handle here. First, // we allow a program to get multiple instances of __ConsoleStreams // around the same OS handle, so closing one handle would invalidate // them all. Additionally, we want a second AppDomain to be able to // write to stdout if a second AppDomain quits. if (_handle != null) { _handle = null; } _canRead = false; _canWrite = false; base.Dispose(disposing); } public override void Flush() { if (_handle == null) __Error.FileNotOpen(); if (!CanWrite) __Error.WriteNotSupported(); } public override void SetLength(long value) { __Error.SeekNotSupported(); } [ResourceExposure(ResourceScope.None)] [ResourceConsumption(ResourceScope.Process, ResourceScope.Process)] public override int Read([In, Out] byte[] buffer, int offset, int count) { if (buffer==null) throw new ArgumentNullException("buffer"); if (offset < 0 || count < 0) throw new ArgumentOutOfRangeException((offset < 0 ? "offset" : "count"), Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum")); if (buffer.Length - offset < count) throw new ArgumentException(Environment.GetResourceString("Argument_InvalidOffLen")); if (!_canRead) __Error.ReadNotSupported(); int errorCode = 0; int result = ReadFileNative(_handle, buffer, offset, count, 0, out errorCode); if (result == -1) { __Error.WinIOError(errorCode, String.Empty); } return result; } public override long Seek(long offset, SeekOrigin origin) { __Error.SeekNotSupported(); return 0; // compiler appeasement } [ResourceExposure(ResourceScope.None)] [ResourceConsumption(ResourceScope.Process, ResourceScope.Process)] public override void Write(byte[] buffer, int offset, int count) { if (buffer==null) throw new ArgumentNullException("buffer"); if (offset < 0 || count < 0) throw new ArgumentOutOfRangeException((offset < 0 ? "offset" : "count"), Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum")); if (buffer.Length - offset < count) throw new ArgumentException(Environment.GetResourceString("Argument_InvalidOffLen")); if (!_canWrite) __Error.WriteNotSupported(); int errorCode = 0; int result = WriteFileNative(_handle, buffer, offset, count, 0, out errorCode); if (result == -1) { //BCLDebug.ConsoleError("__ConsoleStream::Write: throwing on error. Error code: "+errorCode+" 0x"+errorCode.ToString("x")+" handle: "+_handle.ToString()); __Error.WinIOError(errorCode, String.Empty); } return; } // P/Invoke wrappers for writing to and from a file, nearly identical // to the ones on FileStream. These are duplicated to save startup/hello // world working set. [ResourceExposure(ResourceScope.Process)] [ResourceConsumption(ResourceScope.Process)] private unsafe static int ReadFileNative(SafeFileHandle hFile, byte[] bytes, int offset, int count, int mustBeZero, out int errorCode) { BCLDebug.Assert(offset >= 0, "offset >= 0"); BCLDebug.Assert(count >= 0, "count >= 0"); BCLDebug.Assert(bytes != null, "bytes != null"); // Don't corrupt memory when multiple threads are erroneously writing // to this stream simultaneously. if (bytes.Length - offset < count) throw new IndexOutOfRangeException(Environment.GetResourceString("IndexOutOfRange_IORaceCondition")); // You can't use the fixed statement on an array of length 0. if (bytes.Length==0) { errorCode = 0; return 0; } int r; int numBytesRead; fixed(byte* p = bytes) { r = ReadFile(hFile, p + offset, count, out numBytesRead, Win32Native.NULL); } if (r==0) { errorCode = Marshal.GetLastWin32Error(); if (errorCode == ERROR_BROKEN_PIPE) { // A pipe into stdin was closed. Not an error, but EOF. return 0; } return -1; } else errorCode = 0; return numBytesRead; } [ResourceExposure(ResourceScope.Process)] [ResourceConsumption(ResourceScope.Process)] private static unsafe int WriteFileNative(SafeFileHandle hFile, byte[] bytes, int offset, int count, int mustBeZero, out int errorCode) { BCLDebug.Assert(offset >= 0, "offset >= 0"); BCLDebug.Assert(count >= 0, "count >= 0"); BCLDebug.Assert(bytes != null, "bytes != null"); BCLDebug.Assert(bytes.Length >= offset + count, "bytes.Length >= offset + count"); // You can't use the fixed statement on an array of length 0. if (bytes.Length==0) { errorCode = 0; return 0; } int numBytesWritten = 0; int r; fixed(byte* p = bytes) { r = WriteFile(hFile, p + offset, count, out numBytesWritten, Win32Native.NULL); } if (r==0) { errorCode = Marshal.GetLastWin32Error(); // For pipes that are closing or broken, just stop. if (errorCode==ERROR_NO_DATA || errorCode==ERROR_BROKEN_PIPE) return 0; return -1; } else { errorCode = 0; } return numBytesWritten; } // The P/Invoke declarations for ReadFile and WriteFile are here for a reason! This prevents us from loading several classes // in the trivial hello world case. [DllImport(Win32Native.KERNEL32, SetLastError=true), SuppressUnmanagedCodeSecurityAttribute] [ResourceExposure(ResourceScope.Process)] unsafe private static extern int ReadFile(SafeFileHandle handle, byte* bytes, int numBytesToRead, out int numBytesRead, IntPtr mustBeZero); [DllImport(Win32Native.KERNEL32, SetLastError=true), SuppressUnmanagedCodeSecurityAttribute] [ResourceExposure(ResourceScope.Process)] internal static unsafe extern int WriteFile(SafeFileHandle handle, byte* bytes, int numBytesToWrite, out int numBytesWritten, IntPtr mustBeZero); } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
Link Menu
![Network programming in C#, Network Programming in VB.NET, Network Programming in .NET](/images/book.jpg)
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- HtmlLinkAdapter.cs
- HandleRef.cs
- ConfigXmlCDataSection.cs
- FontDifferentiator.cs
- SqlDataSourceQueryConverter.cs
- CngAlgorithm.cs
- XamlTemplateSerializer.cs
- TreeSet.cs
- BulletedList.cs
- ImmutablePropertyDescriptorGridEntry.cs
- StringSorter.cs
- AutoResetEvent.cs
- _ContextAwareResult.cs
- BackgroundFormatInfo.cs
- DoubleLink.cs
- DisplayNameAttribute.cs
- VectorConverter.cs
- XsdValidatingReader.cs
- TemplatePropertyEntry.cs
- EnumCodeDomSerializer.cs
- HostedTransportConfigurationManager.cs
- CommunicationException.cs
- LineServicesCallbacks.cs
- RequiredFieldValidator.cs
- DefaultHttpHandler.cs
- RSAOAEPKeyExchangeFormatter.cs
- DesignerResources.cs
- XmlSchemaInferenceException.cs
- RequestNavigateEventArgs.cs
- FolderLevelBuildProvider.cs
- XmlDownloadManager.cs
- RecordConverter.cs
- EditorZone.cs
- MembershipUser.cs
- BrowserCapabilitiesCompiler.cs
- ModifierKeysConverter.cs
- ToolStripTextBox.cs
- MessageBox.cs
- AnimationTimeline.cs
- FigureHelper.cs
- SessionSwitchEventArgs.cs
- httpstaticobjectscollection.cs
- BitmapMetadata.cs
- XhtmlBasicFormAdapter.cs
- TextWriterEngine.cs
- EventArgs.cs
- XmlHierarchyData.cs
- DecimalMinMaxAggregationOperator.cs
- DbParameterCollection.cs
- XmlSchemaIdentityConstraint.cs
- ToolStripRenderer.cs
- Avt.cs
- SQLBytes.cs
- DataRelationPropertyDescriptor.cs
- DataGridItemEventArgs.cs
- CommentEmitter.cs
- EventBindingService.cs
- AmbientValueAttribute.cs
- ImageCollectionCodeDomSerializer.cs
- WsrmTraceRecord.cs
- ResolveMatchesMessage11.cs
- ThaiBuddhistCalendar.cs
- DateTimeValueSerializer.cs
- DataGridRelationshipRow.cs
- BaseValidator.cs
- XmlComment.cs
- SignedXmlDebugLog.cs
- TableLayoutStyleCollection.cs
- WindowsFormsHelpers.cs
- XsdCachingReader.cs
- TrustManagerMoreInformation.cs
- TranslateTransform3D.cs
- CodeDirectiveCollection.cs
- PageRouteHandler.cs
- FillRuleValidation.cs
- DisableDpiAwarenessAttribute.cs
- ObjectQuery_EntitySqlExtensions.cs
- RemotingSurrogateSelector.cs
- StringFormat.cs
- SystemSounds.cs
- TextElementCollection.cs
- DesignBindingConverter.cs
- initElementDictionary.cs
- DragStartedEventArgs.cs
- WsdlServiceChannelBuilder.cs
- EvidenceBase.cs
- JulianCalendar.cs
- FixedPageProcessor.cs
- XmlNodeWriter.cs
- HelpKeywordAttribute.cs
- Empty.cs
- DataGridTable.cs
- MsmqInputMessage.cs
- PrimitiveType.cs
- DataGridViewTopRowAccessibleObject.cs
- PackageRelationshipSelector.cs
- CategoryAttribute.cs
- DocumentPageViewAutomationPeer.cs
- _ConnectStream.cs
- GenericRootAutomationPeer.cs