Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / Orcas / SP / wpf / src / Shared / MS / Internal / IO / SynchronizingStream.cs / 1 / SynchronizingStream.cs
//------------------------------------------------------------------------------
// Microsoft Avalon
// Copyright (c) Microsoft Corporation, 2001
//
// File: SynchronizingStream.cs
//
// Description: Stream that locks on given syncRoot before entering any public API's.
//
// History: 01/20/06 - brucemac - created
//-----------------------------------------------------------------------------
using System;
using System.Diagnostics;
using System.IO;
using System.Windows;
namespace MS.Internal.IO.Packaging
{
///
/// Wrap returned stream to protect non-thread-safe API's from race conditions
///
internal class SynchronizingStream : Stream
{
//-----------------------------------------------------
//
// Constructors
//
//-----------------------------------------------------
///
/// Serializes access by locking on the given object
///
/// stream to read from (baseStream)
/// object to lock on
internal SynchronizingStream(Stream stream, Object syncRoot)
{
if (stream == null)
throw new ArgumentNullException("stream");
if (syncRoot == null)
throw new ArgumentNullException("syncRoot");
_baseStream = stream;
_syncRoot = syncRoot;
}
//------------------------------------------------------
//
// Public Methods
//
//-----------------------------------------------------
///
/// Return the bytes requested
///
/// destination buffer
/// offset to write into that buffer
/// how many bytes requested
/// how many bytes were written into buffer
public override int Read(byte[] buffer, int offset, int count)
{
lock (_syncRoot)
{
CheckDisposed();
return (_baseStream.Read(buffer, offset, count));
}
}
///
/// Read a single byte
///
/// The unsigned byte cast to an Int32, or -1 if at the end of the stream.
public override int ReadByte()
{
lock (_syncRoot)
{
CheckDisposed();
return (_baseStream.ReadByte());
}
}
///
/// Write a single byte
///
/// byte to write
public override void WriteByte(byte b)
{
lock (_syncRoot)
{
CheckDisposed();
_baseStream.WriteByte(b);
}
}
///
/// Seek
///
/// only zero is supported
/// only SeekOrigin.Begin is supported
/// zero
public override long Seek(long offset, SeekOrigin origin)
{
lock (_syncRoot)
{
CheckDisposed();
return _baseStream.Seek(offset, origin);
}
}
///
/// SetLength
///
/// not supported
public override void SetLength(long newLength)
{
lock (_syncRoot)
{
CheckDisposed();
_baseStream.SetLength(newLength);
}
}
///
/// Write
///
/// not supported
public override void Write(byte[] buf, int offset, int count)
{
lock (_syncRoot)
{
CheckDisposed();
_baseStream.Write(buf, offset, count);
}
}
///
/// Flush
///
/// not supported
public override void Flush()
{
lock (_syncRoot)
{
CheckDisposed();
_baseStream.Flush();
}
}
//------------------------------------------------------
//
// Public Properties
//
//------------------------------------------------------
///
/// Is stream readable?
///
public override bool CanRead
{
get
{
lock (_syncRoot)
{
return ((_baseStream != null) && _baseStream.CanRead);
}
}
}
///
/// Is stream seekable?
///
/// We MUST support seek as this is used to implement ILockBytes.ReadAt()
public override bool CanSeek
{
get
{
lock (_syncRoot)
{
return ((_baseStream != null) && _baseStream.CanSeek);
}
}
}
///
/// Is stream writeable?
///
public override bool CanWrite
{
get
{
lock (_syncRoot)
{
return ((_baseStream != null) && _baseStream.CanWrite);
}
}
}
///
/// Logical byte position in this stream
///
public override long Position
{
get
{
lock (_syncRoot)
{
CheckDisposed();
return _baseStream.Position;
}
}
set
{
lock (_syncRoot)
{
CheckDisposed();
_baseStream.Position = value;
}
}
}
///
/// Length
///
public override long Length
{
get
{
lock (_syncRoot)
{
CheckDisposed();
return _baseStream.Length;
}
}
}
//-----------------------------------------------------
//
// Protected Methods
//
//------------------------------------------------------
protected override void Dispose(bool disposing)
{
lock (_syncRoot)
{
try
{
if (disposing && (_baseStream != null))
{
// close the underlying Stream
_baseStream.Close();
// NOTE: We cannot set _syncRoot to null because it is used
// on entry to every public method and property.
}
}
finally
{
base.Dispose(disposing);
_baseStream = null;
}
}
}
//-----------------------------------------------------
//
// Private Methods
//
//-----------------------------------------------------
///
/// CheckDisposed
///
/// Pre-condition that lock has been acquired.
private void CheckDisposed()
{
if (_baseStream == null)
throw new ObjectDisposedException("Stream");
}
//-----------------------------------------------------
//
// Private Fields
//
//------------------------------------------------------
private Stream _baseStream; // stream we are wrapping
private Object _syncRoot; // object to lock on
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------------------------
// Microsoft Avalon
// Copyright (c) Microsoft Corporation, 2001
//
// File: SynchronizingStream.cs
//
// Description: Stream that locks on given syncRoot before entering any public API's.
//
// History: 01/20/06 - brucemac - created
//-----------------------------------------------------------------------------
using System;
using System.Diagnostics;
using System.IO;
using System.Windows;
namespace MS.Internal.IO.Packaging
{
///
/// Wrap returned stream to protect non-thread-safe API's from race conditions
///
internal class SynchronizingStream : Stream
{
//-----------------------------------------------------
//
// Constructors
//
//-----------------------------------------------------
///
/// Serializes access by locking on the given object
///
/// stream to read from (baseStream)
/// object to lock on
internal SynchronizingStream(Stream stream, Object syncRoot)
{
if (stream == null)
throw new ArgumentNullException("stream");
if (syncRoot == null)
throw new ArgumentNullException("syncRoot");
_baseStream = stream;
_syncRoot = syncRoot;
}
//------------------------------------------------------
//
// Public Methods
//
//-----------------------------------------------------
///
/// Return the bytes requested
///
/// destination buffer
/// offset to write into that buffer
/// how many bytes requested
/// how many bytes were written into buffer
public override int Read(byte[] buffer, int offset, int count)
{
lock (_syncRoot)
{
CheckDisposed();
return (_baseStream.Read(buffer, offset, count));
}
}
///
/// Read a single byte
///
/// The unsigned byte cast to an Int32, or -1 if at the end of the stream.
public override int ReadByte()
{
lock (_syncRoot)
{
CheckDisposed();
return (_baseStream.ReadByte());
}
}
///
/// Write a single byte
///
/// byte to write
public override void WriteByte(byte b)
{
lock (_syncRoot)
{
CheckDisposed();
_baseStream.WriteByte(b);
}
}
///
/// Seek
///
/// only zero is supported
/// only SeekOrigin.Begin is supported
/// zero
public override long Seek(long offset, SeekOrigin origin)
{
lock (_syncRoot)
{
CheckDisposed();
return _baseStream.Seek(offset, origin);
}
}
///
/// SetLength
///
/// not supported
public override void SetLength(long newLength)
{
lock (_syncRoot)
{
CheckDisposed();
_baseStream.SetLength(newLength);
}
}
///
/// Write
///
/// not supported
public override void Write(byte[] buf, int offset, int count)
{
lock (_syncRoot)
{
CheckDisposed();
_baseStream.Write(buf, offset, count);
}
}
///
/// Flush
///
/// not supported
public override void Flush()
{
lock (_syncRoot)
{
CheckDisposed();
_baseStream.Flush();
}
}
//------------------------------------------------------
//
// Public Properties
//
//------------------------------------------------------
///
/// Is stream readable?
///
public override bool CanRead
{
get
{
lock (_syncRoot)
{
return ((_baseStream != null) && _baseStream.CanRead);
}
}
}
///
/// Is stream seekable?
///
/// We MUST support seek as this is used to implement ILockBytes.ReadAt()
public override bool CanSeek
{
get
{
lock (_syncRoot)
{
return ((_baseStream != null) && _baseStream.CanSeek);
}
}
}
///
/// Is stream writeable?
///
public override bool CanWrite
{
get
{
lock (_syncRoot)
{
return ((_baseStream != null) && _baseStream.CanWrite);
}
}
}
///
/// Logical byte position in this stream
///
public override long Position
{
get
{
lock (_syncRoot)
{
CheckDisposed();
return _baseStream.Position;
}
}
set
{
lock (_syncRoot)
{
CheckDisposed();
_baseStream.Position = value;
}
}
}
///
/// Length
///
public override long Length
{
get
{
lock (_syncRoot)
{
CheckDisposed();
return _baseStream.Length;
}
}
}
//-----------------------------------------------------
//
// Protected Methods
//
//------------------------------------------------------
protected override void Dispose(bool disposing)
{
lock (_syncRoot)
{
try
{
if (disposing && (_baseStream != null))
{
// close the underlying Stream
_baseStream.Close();
// NOTE: We cannot set _syncRoot to null because it is used
// on entry to every public method and property.
}
}
finally
{
base.Dispose(disposing);
_baseStream = null;
}
}
}
//-----------------------------------------------------
//
// Private Methods
//
//-----------------------------------------------------
///
/// CheckDisposed
///
/// Pre-condition that lock has been acquired.
private void CheckDisposed()
{
if (_baseStream == null)
throw new ObjectDisposedException("Stream");
}
//-----------------------------------------------------
//
// Private Fields
//
//------------------------------------------------------
private Stream _baseStream; // stream we are wrapping
private Object _syncRoot; // object to lock on
}
}
// 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
- ActivityCodeGenerator.cs
- dtdvalidator.cs
- FontNamesConverter.cs
- DataGridViewRowConverter.cs
- ToolStripOverflow.cs
- StrongNamePublicKeyBlob.cs
- BinaryKeyIdentifierClause.cs
- ArgumentException.cs
- BitmapSizeOptions.cs
- TextEncodedRawTextWriter.cs
- LongTypeConverter.cs
- _NestedSingleAsyncResult.cs
- DataGridItem.cs
- FreezableCollection.cs
- DropDownButton.cs
- MatchingStyle.cs
- OracleBFile.cs
- ReliableRequestSessionChannel.cs
- TempEnvironment.cs
- QilTypeChecker.cs
- _FtpControlStream.cs
- Verify.cs
- HostProtectionException.cs
- MailWebEventProvider.cs
- XsltException.cs
- _IPv4Address.cs
- StyleReferenceConverter.cs
- ReflectTypeDescriptionProvider.cs
- FormViewModeEventArgs.cs
- StandardOleMarshalObject.cs
- BindStream.cs
- CodeDomExtensionMethods.cs
- PointLight.cs
- XmlAutoDetectWriter.cs
- IEnumerable.cs
- DataKey.cs
- TriggerBase.cs
- WorkflowMarkupSerializationProvider.cs
- TextHidden.cs
- ButtonFieldBase.cs
- ApplicationServiceManager.cs
- BindingList.cs
- ReadWriteObjectLock.cs
- PngBitmapEncoder.cs
- PerfCounterSection.cs
- Renderer.cs
- DataGridItemEventArgs.cs
- DownloadProgressEventArgs.cs
- FileSecurity.cs
- XmlNodeReader.cs
- ArraySubsetEnumerator.cs
- EntityDataSourceStatementEditor.cs
- SortQuery.cs
- WebPartCollection.cs
- HttpHandler.cs
- EntityDataSourceSelectedEventArgs.cs
- UIInitializationException.cs
- SortedSetDebugView.cs
- IdleTimeoutMonitor.cs
- SqlMultiplexer.cs
- AvTraceDetails.cs
- StorageInfo.cs
- EventTask.cs
- DataServiceProcessingPipeline.cs
- SafeLocalMemHandle.cs
- CanonicalXml.cs
- XmlAttributeProperties.cs
- CompositeTypefaceMetrics.cs
- XmlDocumentSchema.cs
- DataSetUtil.cs
- PermissionRequestEvidence.cs
- FormatConvertedBitmap.cs
- DummyDataSource.cs
- UnionCqlBlock.cs
- FontDialog.cs
- Label.cs
- PlainXmlSerializer.cs
- StrongName.cs
- MailDefinition.cs
- SwitchAttribute.cs
- SqlClientWrapperSmiStream.cs
- ISAPIApplicationHost.cs
- CommandEventArgs.cs
- NavigatorInvalidBodyAccessException.cs
- WindowCollection.cs
- Point3DValueSerializer.cs
- RadioButtonBaseAdapter.cs
- PersonalizationStateQuery.cs
- storepermissionattribute.cs
- EventManager.cs
- ParameterSubsegment.cs
- Crypto.cs
- SHA384Managed.cs
- RenderOptions.cs
- ConstNode.cs
- FixedSchema.cs
- JavaScriptSerializer.cs
- FamilyTypeface.cs
- HttpListenerResponse.cs
- PolygonHotSpot.cs