/mcs/class/System.Core/System.IO.Pipes/PipeStream.cs
C# | 321 lines | 236 code | 53 blank | 32 comment | 24 complexity | da096aa14e9c98467ea4d982db43c6e1 MD5 | raw file
Possible License(s): LGPL-2.0, MPL-2.0-no-copyleft-exception, CC-BY-SA-3.0, GPL-2.0, LGPL-2.1
- //
- // PipeStream.cs
- //
- // Author:
- // Atsushi Enomoto <atsushi@ximian.com>
- //
- // Copyright (C) 2009 Novell, Inc. http://www.novell.com
- //
- // Permission is hereby granted, free of charge, to any person obtaining
- // a copy of this software and associated documentation files (the
- // "Software"), to deal in the Software without restriction, including
- // without limitation the rights to use, copy, modify, merge, publish,
- // distribute, sublicense, and/or sell copies of the Software, and to
- // permit persons to whom the Software is furnished to do so, subject to
- // the following conditions:
- //
- // The above copyright notice and this permission notice shall be
- // included in all copies or substantial portions of the Software.
- //
- // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
- // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
- // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
- // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- //
- using Microsoft.Win32.SafeHandles;
- using System;
- using System.IO;
- using System.Linq;
- using System.Security.AccessControl;
- using System.Security.Permissions;
- using System.Security.Principal;
- namespace System.IO.Pipes
- {
- [PermissionSet (SecurityAction.InheritanceDemand, Name = "FullTrust")]
- [HostProtection (SecurityAction.LinkDemand, MayLeakOnAbort = true)]
- public abstract class PipeStream : Stream
- {
- // FIXME: not precise.
- internal const int DefaultBufferSize = 0x400;
- internal static bool IsWindows {
- get { return Win32Marshal.IsWindows; }
- }
- internal Exception ThrowACLException ()
- {
- return new NotImplementedException ("ACL is not supported in Mono");
- }
- internal static PipeAccessRights ToAccessRights (PipeDirection direction)
- {
- switch (direction) {
- case PipeDirection.In:
- return PipeAccessRights.ReadData;
- case PipeDirection.Out:
- return PipeAccessRights.WriteData;
- case PipeDirection.InOut:
- return PipeAccessRights.ReadData | PipeAccessRights.WriteData;
- default:
- throw new ArgumentOutOfRangeException ();
- }
- }
- internal static PipeDirection ToDirection (PipeAccessRights rights)
- {
- bool r = (rights & PipeAccessRights.ReadData) != 0;
- bool w = (rights & PipeAccessRights.WriteData) != 0;
- if (r) {
- if (w)
- return PipeDirection.InOut;
- else
- return PipeDirection.In;
- } else {
- if (w)
- return PipeDirection.Out;
- else
- throw new ArgumentOutOfRangeException ();
- }
- }
- protected PipeStream (PipeDirection direction, int bufferSize)
- : this (direction, PipeTransmissionMode.Byte, bufferSize)
- {
- }
- protected PipeStream (PipeDirection direction, PipeTransmissionMode transmissionMode, int outBufferSize)
- {
- this.direction = direction;
- this.transmission_mode = transmissionMode;
- read_trans_mode = transmissionMode;
- if (outBufferSize <= 0)
- throw new ArgumentOutOfRangeException ("bufferSize must be greater than 0");
- buffer_size = outBufferSize;
- }
- PipeDirection direction;
- PipeTransmissionMode transmission_mode, read_trans_mode;
- int buffer_size;
- SafePipeHandle handle;
- Stream stream;
- public override bool CanRead {
- get { return (direction & PipeDirection.In) != 0; }
- }
- public override bool CanSeek {
- get { return false; }
- }
- public override bool CanWrite {
- get { return (direction & PipeDirection.Out) != 0; }
- }
- public virtual int InBufferSize {
- get { return buffer_size; }
- }
- public bool IsAsync { get; private set; }
- public bool IsConnected { get; protected set; }
- internal Stream Stream {
- get {
- if (!IsConnected)
- throw new InvalidOperationException ("Pipe is not connected");
- if (stream == null)
- stream = new FileStream (handle.DangerousGetHandle (), CanRead ? (CanWrite ? FileAccess.ReadWrite : FileAccess.Read) : FileAccess.Write, true, buffer_size, IsAsync);
- return stream;
- }
- set { stream = value; }
- }
- protected bool IsHandleExposed { get; private set; }
- [MonoTODO]
- public bool IsMessageComplete { get; private set; }
- [MonoTODO]
- public virtual int OutBufferSize {
- get { return buffer_size; }
- }
- public virtual PipeTransmissionMode ReadMode {
- get {
- CheckPipePropertyOperations ();
- return read_trans_mode;
- }
- set {
- CheckPipePropertyOperations ();
- read_trans_mode = value;
- }
- }
- public SafePipeHandle SafePipeHandle {
- get {
- CheckPipePropertyOperations ();
- return handle;
- }
- }
- public virtual PipeTransmissionMode TransmissionMode {
- get {
- CheckPipePropertyOperations ();
- return transmission_mode;
- }
- }
- // initialize/dispose/state check
- [MonoTODO]
- protected internal virtual void CheckPipePropertyOperations ()
- {
- }
- [MonoTODO]
- protected internal void CheckReadOperations ()
- {
- if (!IsConnected)
- throw new InvalidOperationException ("Pipe is not connected");
- if (!CanRead)
- throw new NotSupportedException ("The pipe stream does not support read operations");
- }
- [MonoTODO]
- protected internal void CheckWriteOperations ()
- {
- if (!IsConnected)
- throw new InvalidOperationException ("Pipe us not connected");
- if (!CanWrite)
- throw new NotSupportedException ("The pipe stream does not support write operations");
- }
- protected void InitializeHandle (SafePipeHandle handle, bool isExposed, bool isAsync)
- {
- this.handle = handle;
- this.IsHandleExposed = isExposed;
- this.IsAsync = isAsync;
- }
- protected override void Dispose (bool disposing)
- {
- if (handle != null && disposing)
- handle.Dispose ();
- }
- // not supported
- public override long Length {
- get { throw new NotSupportedException (); }
- }
- public override long Position {
- get { return 0; }
- set { throw new NotSupportedException (); }
- }
- public override void SetLength (long value)
- {
- throw new NotSupportedException ();
- }
- public override long Seek (long offset, SeekOrigin origin)
- {
- throw new NotSupportedException ();
- }
- [MonoNotSupported ("ACL is not supported in Mono")]
- public PipeSecurity GetAccessControl ()
- {
- throw ThrowACLException ();
- }
- [MonoNotSupported ("ACL is not supported in Mono")]
- public void SetAccessControl (PipeSecurity pipeSecurity)
- {
- throw ThrowACLException ();
- }
- // pipe I/O
- public void WaitForPipeDrain ()
- {
- }
- [MonoTODO]
- public override int Read (byte [] buffer, int offset, int count)
- {
- CheckReadOperations ();
- return Stream.Read (buffer, offset, count);
- }
- [MonoTODO]
- public override int ReadByte ()
- {
- CheckReadOperations ();
- return Stream.ReadByte ();
- }
- [MonoTODO]
- public override void Write (byte [] buffer, int offset, int count)
- {
- CheckWriteOperations ();
- Stream.Write (buffer, offset, count);
- }
- [MonoTODO]
- public override void WriteByte (byte value)
- {
- CheckWriteOperations ();
- Stream.WriteByte (value);
- }
- [MonoTODO]
- public override void Flush ()
- {
- CheckWriteOperations ();
- Stream.Flush ();
- }
- // async
- Func<byte [],int,int,int> read_delegate;
- [HostProtection (SecurityAction.LinkDemand, ExternalThreading = true)]
- public override IAsyncResult BeginRead (byte [] buffer, int offset, int count, AsyncCallback callback, object state)
- {
- if (read_delegate == null)
- read_delegate = new Func<byte[],int,int,int> (Read);
- return read_delegate.BeginInvoke (buffer, offset, count, callback, state);
- }
- Action<byte[],int,int> write_delegate;
- [HostProtection (SecurityAction.LinkDemand, ExternalThreading = true)]
- public override IAsyncResult BeginWrite (byte[] buffer, int offset, int count, AsyncCallback callback, object state)
- {
- if (write_delegate == null)
- write_delegate = new Action<byte[],int,int> (Write);
- return write_delegate.BeginInvoke (buffer, offset, count, callback, state);
- }
- public override int EndRead (IAsyncResult asyncResult)
- {
- return read_delegate.EndInvoke (asyncResult);
- }
- public override void EndWrite (IAsyncResult asyncResult)
- {
- write_delegate.EndInvoke (asyncResult);
- }
- }
- }