Mercurial > hg > ucis.core

annotate Windows/WindowsNamedPipe.cs @ 110:5e717aac4c1d

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Improvements in RemotingManager (close event) and Windows Named Pipe (accept time-out)
author Ivo Smits <Ivo@UCIS.nl>
date Fri, 07 Nov 2014 18:33:34 +0100
parents ec222fb577dd
children
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1 ???using System;
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2 using System.ComponentModel;
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3 using System.IO;
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4 using System.Runtime.InteropServices;
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5 using System.Threading;
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6 using Microsoft.Win32.SafeHandles;
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7 using UCIS.Util;
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8
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9 namespace UCIS.Windows {
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10 public class WindowsNamedPipe : PacketStream {
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11 delegate Byte[] ReadPacketDelegate();
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12 ReadPacketDelegate ReadPacketDelegateInstance = null;
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13 SafeFileHandle PipeHandle;
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14
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15 [DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Auto)]
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16 static extern SafeFileHandle CreateFile(string lpFileName, uint dwDesiredAccess, [MarshalAs(UnmanagedType.U4)] FileShare dwShareMode, IntPtr lpSecurityAttributes, [MarshalAs(UnmanagedType.U4)] FileMode dwCreationDisposition, UInt32 dwFlagsAndAttributes, IntPtr hTemplateFile);
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17 [DllImport("kernel32.dll", SetLastError = true)]
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18 static extern unsafe bool ReadFile(SafeFileHandle hFile, Byte* lpBuffer, uint nNumberOfBytesToRead, out uint lpNumberOfBytesRead, NativeOverlapped* lpOverlapped);
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19 [DllImport("kernel32.dll", SetLastError = true)]
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20 static extern unsafe bool WriteFile(SafeFileHandle hFile, Byte* lpBuffer, uint nNumberOfBytesToWrite, out uint lpNumberOfBytesWritten, NativeOverlapped* lpOverlapped);
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21 [DllImport("kernel32.dll", SetLastError = true)]
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22 static extern unsafe bool GetOverlappedResult(SafeFileHandle hFile, NativeOverlapped* lpOverlapped, out uint lpNumberOfBytesTransferred, Boolean bWait);
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23 [DllImport("kernel32.dll", SetLastError = true)]
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24 static extern bool SetNamedPipeHandleState(SafeFileHandle hNamedPipe, ref UInt32 lpMode, IntPtr lpMaxCollectionCount, IntPtr lpCollectDataTimeout);
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25 [DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Ansi)]
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26 static extern SafeFileHandle CreateNamedPipe([MarshalAs(UnmanagedType.LPStr)] String lpName, UInt32 dwOpenMode, UInt32 dwPipeMode, UInt32 nMaxInstances, UInt32 nOutBufferSize, UInt32 nInBufferSize, UInt32 nDefaultTimeOut, IntPtr lpSecurityAttributes);
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27 [DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Auto)]
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28 static extern unsafe bool ConnectNamedPipe(SafeFileHandle hNamedPipe, NativeOverlapped* lpOverlapped);
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29 [DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Auto)]
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30 static extern unsafe bool GetNamedPipeInfo(SafeFileHandle hNamedPipe, out UInt32 lpFlags, IntPtr lpOutBufferSize, IntPtr lpInBufferSize, IntPtr lpMaxInstances);
110
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31 [DllImport("kernel32.dll")]
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32 [return: MarshalAs(UnmanagedType.Bool)]
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33 static extern bool CancelIo(SafeFileHandle hFile);
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34
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35 const UInt32 PIPE_ACCESS_DUPLEX = 0x00000003;
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36 const UInt32 FILE_FLAG_OVERLAPPED = 0x40000000;
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37 const UInt32 PIPE_TYPE_BYTE = 0x00000000;
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38 const UInt32 PIPE_TYPE_MESSAGE = 0x00000004;
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39 const UInt32 PIPE_READMODE_BYTE = 0x00000000;
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40 const UInt32 PIPE_READMODE_MESSAGE = 0x00000002;
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41
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42 public int InitialMessageBufferSize { get; set; }
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43
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44 private WindowsNamedPipe(SafeFileHandle handle) {
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45 InitialMessageBufferSize = 1024;
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46 this.PipeHandle = handle;
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47 }
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48 public static WindowsNamedPipe Create(String name, Boolean messageMode, uint maxClients, uint readBuffer, uint writeBuffer, uint defaultTimeout) {
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49 SafeFileHandle handle = CreateNamedPipe(name, PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
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50 messageMode ? (PIPE_TYPE_MESSAGE | PIPE_READMODE_MESSAGE) : (PIPE_TYPE_BYTE | PIPE_READMODE_BYTE),
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51 maxClients, writeBuffer, readBuffer, defaultTimeout, IntPtr.Zero);
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52 if (handle.IsInvalid) throw new Win32Exception(Marshal.GetLastWin32Error());
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53 return new WindowsNamedPipe(handle);
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54 }
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55 public static WindowsNamedPipe Connect(String name) {
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56 SafeFileHandle handle = CreateFile(name, 0x40000000 | 0x80000000, FileShare.None, IntPtr.Zero, FileMode.Open, 0x40000000, IntPtr.Zero);
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57 if (handle.IsInvalid) throw new Win32Exception(Marshal.GetLastWin32Error());
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58 UInt32 flags;
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59 if (!GetNamedPipeInfo(handle, out flags, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero)) throw new Win32Exception(Marshal.GetLastWin32Error());
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60 UInt32 lpMode = (flags & PIPE_TYPE_MESSAGE) != 0 ? PIPE_READMODE_MESSAGE : PIPE_READMODE_BYTE;
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61 if (!SetNamedPipeHandleState(handle, ref lpMode, IntPtr.Zero, IntPtr.Zero)) throw new Win32Exception(Marshal.GetLastWin32Error());
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62 return new WindowsNamedPipe(handle);
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63 }
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64
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65 public unsafe void WaitForClient() {
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66 WaitForClient(-1);
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67 }
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68 public unsafe void WaitForClient(int millisecondsTimeout) {
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69 uint nread;
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70 using (ManualResetEvent evt = new ManualResetEvent(false)) {
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71 NativeOverlapped overlapped = new NativeOverlapped();
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72 overlapped.EventHandle = evt.SafeWaitHandle.DangerousGetHandle();
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73 if (!ConnectNamedPipe(PipeHandle, &overlapped)) {
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74 int err = Marshal.GetLastWin32Error();
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75 if (err != 997) throw new Win32Exception(err);
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76 if (!evt.WaitOne(millisecondsTimeout)) {
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77 CancelIo(PipeHandle);
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78 throw new TimeoutException("The operation timed out");
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79 }
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80 if (!GetOverlappedResult(PipeHandle, &overlapped, out nread, false)) throw new Win32Exception(Marshal.GetLastWin32Error());
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81 }
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82 }
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83 }
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84
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85 private unsafe int ReadInternal(Byte[] buffer, int offset, int count, out int error) {
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86 if (offset < 0 || offset + count > buffer.Length) throw new ArgumentOutOfRangeException("offset", "Specified buffer is outside of array bounds");
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87 uint nread;
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88 using (ManualResetEvent evt = new ManualResetEvent(false)) {
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89 NativeOverlapped overlapped = new NativeOverlapped();
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90 overlapped.EventHandle = evt.SafeWaitHandle.DangerousGetHandle();
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91 fixed (Byte* bufferptr = buffer) {
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92 if (ReadFile(PipeHandle, bufferptr + offset, (uint)count, out nread, &overlapped)) {
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93 error = 0;
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94 } else {
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95 error = Marshal.GetLastWin32Error();
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96 if (error == 997) {
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97 evt.WaitOne();
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98 if (GetOverlappedResult(PipeHandle, &overlapped, out nread, false)) {
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99 error = 0;
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100 } else {
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101 error = Marshal.GetLastWin32Error();
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102 }
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103 }
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104 }
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105 return (int)nread;
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106 }
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107 }
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108 }
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109 public override unsafe int Read(byte[] buffer, int offset, int count) {
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110 int error;
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111 int nread = ReadInternal(buffer, offset, count, out error);
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112 if (error == 109) return 0;
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113 if (error == 0) return nread;
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114 throw new Win32Exception(error);
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115 }
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116 public override unsafe void Write(byte[] buffer, int offset, int count) {
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117 if (offset < 0 || offset + count > buffer.Length) throw new ArgumentOutOfRangeException("offset", "Specified buffer is outside of array bounds");
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118 uint nread;
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119 using (ManualResetEvent evt = new ManualResetEvent(false)) {
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120 NativeOverlapped overlapped = new NativeOverlapped();
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121 overlapped.EventHandle = evt.SafeWaitHandle.DangerousGetHandle();
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122 fixed (Byte* bufferptr = buffer) {
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123 if (!WriteFile(PipeHandle, bufferptr + offset, (uint)count, out nread, &overlapped)) {
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124 int err = Marshal.GetLastWin32Error();
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125 if (err != 997) throw new Win32Exception(err);
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126 evt.WaitOne();
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127 if (!GetOverlappedResult(PipeHandle, &overlapped, out nread, false)) throw new Win32Exception(Marshal.GetLastWin32Error());
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128 }
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129 }
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130 }
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131 if (nread != count) throw new IOException("Not all data could be written");
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132 }
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133 public override void Close() {
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134 base.Close();
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135 PipeHandle.Close();
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136 }
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137
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138 public unsafe override byte[] ReadPacket() {
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139 int offset = 0;
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140 Byte[] buffer = new Byte[InitialMessageBufferSize];
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141 while (true) {
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142 int error;
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143 int nread = ReadInternal(buffer, offset, buffer.Length - offset, out error);
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144 offset += nread;
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145 if (error == 109) {
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146 return null;
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147 } else if (error == 0) {
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148 if (offset != buffer.Length) Array.Resize(ref buffer, offset);
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149 return buffer;
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150 } else if (error == 234) {
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151 offset = buffer.Length;
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152 Array.Resize(ref buffer, buffer.Length * 2);
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153 } else {
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154 throw new Win32Exception(error);
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155 }
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156 }
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157 }
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158 public override IAsyncResult BeginReadPacket(AsyncCallback callback, object state) {
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159 if (ReadPacketDelegateInstance == null) ReadPacketDelegateInstance = (ReadPacketDelegate)ReadPacket;
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160 return ReadPacketDelegateInstance.BeginInvoke(callback, state);
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161 }
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162 public override byte[] EndReadPacket(IAsyncResult asyncResult) {
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163 return ReadPacketDelegateInstance.EndInvoke(asyncResult);
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164 }
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165
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166 public override bool CanRead {
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167 get { return !PipeHandle.IsClosed; }
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168 }
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169 public override bool CanWrite {
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170 get { return !PipeHandle.IsClosed; }
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171 }
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172
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173 public override void Flush() { }
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174 public override bool CanSeek { get { return false; } }
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175
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176 public override long Length { get { throw new NotSupportedException(); } }
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177 public override long Position {
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178 get { throw new NotSupportedException(); }
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179 set { throw new NotSupportedException(); }
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180 }
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181
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182 public override long Seek(long offset, System.IO.SeekOrigin origin) { throw new NotSupportedException(); }
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183
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184 public override void SetLength(long value) { throw new NotSupportedException(); }
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185
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186 }
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187 }