[605] | 1 | 'Classes/System/IO/FileStreamImpl.ab
|
---|
| 2 |
|
---|
| 3 | Namespace System
|
---|
| 4 | Namespace IO
|
---|
| 5 | Namespace Detail
|
---|
| 6 |
|
---|
| 7 | Sub ThrowIfFilePointerFunctionFailed(dwLow As DWord)
|
---|
| 8 | If dwLow = INVALID_FILE_SIZE Then
|
---|
| 9 | Dim error = GetLastError()
|
---|
| 10 | If error <> NO_ERROR Then
|
---|
| 11 | Detail.ThrowWinIOException("FileStream: Failed to position or file size function.", error)
|
---|
| 12 | End If
|
---|
| 13 | End If
|
---|
| 14 | End Sub
|
---|
| 15 |
|
---|
| 16 | /*!
|
---|
| 17 | @brief シーク系関数の集合
|
---|
| 18 | @date 2008/08/21
|
---|
| 19 | @auther Egtra
|
---|
| 20 | */
|
---|
| 21 | Class SeekFunctions
|
---|
| 22 | Public
|
---|
| 23 | Abstract Function CanSeek() As Boolean
|
---|
| 24 | Abstract Function Seek(s As FileStream, offset As Int64, origin As SeekOrigin) As Int64
|
---|
| 25 | Abstract Sub Position(s As FileStream, value As QWord)
|
---|
| 26 | Abstract Function Position(s As FileStream) As QWord
|
---|
| 27 | Abstract Function Length(s As FileStream) As QWord
|
---|
| 28 | Abstract Sub SetLength(s As FileStream, value As QWord)
|
---|
| 29 | End Class
|
---|
| 30 |
|
---|
| 31 | /*!
|
---|
| 32 | @brief シークできない実装
|
---|
| 33 | @date 2008/08/21
|
---|
| 34 | @auther Egtra
|
---|
| 35 | */
|
---|
| 36 | Class Unseekable
|
---|
| 37 | Inherits SeekFunctions
|
---|
| 38 | Public
|
---|
| 39 | Override Function CanSeek() As Boolean
|
---|
| 40 | Return False
|
---|
| 41 | End Function
|
---|
| 42 | Override Function Seek(s As FileStream, offset As Int64, origin As SeekOrigin) As Int64
|
---|
| 43 | Throw New NotSupportedException("FileStream.Seek")
|
---|
| 44 | End Function
|
---|
| 45 | Override Sub Position(s As FileStream, vvalue As QWord)
|
---|
| 46 | Throw New NotSupportedException("FileStream.Position")
|
---|
| 47 | End Sub
|
---|
| 48 | Override Function Position(s As FileStream) As QWord
|
---|
| 49 | Throw New NotSupportedException("FileStream.Position")
|
---|
| 50 | End Function
|
---|
| 51 | Override Function Length(s As FileStream) As QWord
|
---|
| 52 | Throw New NotSupportedException("FileStream.Length")
|
---|
| 53 | End Function
|
---|
| 54 | Override Sub SetLength(s As FileStream, value As QWord)
|
---|
| 55 | Throw New NotSupportedException("FileStream.SetLength")
|
---|
| 56 | End Sub
|
---|
| 57 | End Class
|
---|
| 58 |
|
---|
| 59 | /*!
|
---|
| 60 | @brief シークできる実装
|
---|
| 61 | @date 2008/08/21
|
---|
| 62 | @auther Egtra
|
---|
| 63 | */
|
---|
| 64 | Class Seekable
|
---|
| 65 | Inherits SeekFunctions
|
---|
| 66 | Public
|
---|
| 67 | Override Function CanSeek() As Boolean
|
---|
| 68 | Return True
|
---|
| 69 | End Function
|
---|
| 70 | Override Function Seek(s As FileStream, offset As Int64, origin As SeekOrigin) As Int64
|
---|
| 71 | Dim seek = VarPtr(offset) As *LARGE_INTEGER
|
---|
| 72 | Dim ret = SetFilePointer(s.Handle, seek->LowPart As Long, VarPtr(seek->HighPart), origin As DWord)
|
---|
| 73 | If ret = INVALID_SET_FILE_POINTER Then
|
---|
| 74 | Dim error = GetLastError()
|
---|
| 75 | If error = ERROR_NEGATIVE_SEEK Then
|
---|
| 76 | Throw New ArgumentException("FileStream.Seek: Cannot seek to negative offset.")
|
---|
| 77 | ElseIf error <> NO_ERROR Then
|
---|
| 78 | Detail.ThrowWinIOException("FileStream.Seek: Failed to seek.", error)
|
---|
| 79 | End If
|
---|
| 80 | End If
|
---|
| 81 | seek->LowPart = ret
|
---|
| 82 | Seek = offset
|
---|
| 83 | End Function
|
---|
| 84 | Override Sub Position(s As FileStream, value As QWord)
|
---|
| 85 | Dim position = VarPtr(value) As *LARGE_INTEGER
|
---|
| 86 | With position[0]
|
---|
| 87 | Dim ret = SetFilePointer(s.Handle, .LowPart As Long, VarPtr(.HighPart), FILE_BEGIN)
|
---|
| 88 | ThrowIfFilePointerFunctionFailed(ret)
|
---|
| 89 | End With
|
---|
| 90 | End Sub
|
---|
| 91 | Override Function Position(s As FileStream) As QWord
|
---|
| 92 | Dim position = VarPtr(Position) As *LARGE_INTEGER
|
---|
| 93 | With position[0]
|
---|
| 94 | .LowPart = SetFilePointer(s.Handle, .LowPart As Long, VarPtr(.HighPart), FILE_CURRENT)
|
---|
| 95 | ThrowIfFilePointerFunctionFailed(.LowPart)
|
---|
| 96 | End With
|
---|
| 97 | End Function
|
---|
| 98 | Override Function Length(s As FileStream) As QWord
|
---|
| 99 | Dim length = VarPtr(Length) As *ULARGE_INTEGER
|
---|
| 100 | length->LowPart = GetFileSize(s.Handle, VarPtr(length->HighPart))
|
---|
| 101 | ThrowIfFilePointerFunctionFailed(length->LowPart)
|
---|
| 102 | End Function
|
---|
| 103 | Override Sub SetLength(s As FileStream, value As QWord)
|
---|
| 104 | If s.CanWrite() Then
|
---|
| 105 | Dim current = s.Position()
|
---|
| 106 | Position(s, value)
|
---|
| 107 | Dim ret = SetEndOfFile(s.Handle)
|
---|
| 108 | If ret = FALSE Then
|
---|
| 109 | Detail.ThrowWinLastErrorIOException("FileStream.SetLength failed")
|
---|
| 110 | End If
|
---|
| 111 | Position(s, current)
|
---|
| 112 | End If
|
---|
| 113 | End Sub
|
---|
| 114 | End Class
|
---|
| 115 |
|
---|
| 116 | /*!
|
---|
| 117 | @brief シークできる実装(重複IO用)
|
---|
| 118 | @date 2008/08/21
|
---|
| 119 | @auther Egtra
|
---|
| 120 | */
|
---|
| 121 | Class OverlappedSeekable
|
---|
| 122 | Inherits Seekable
|
---|
| 123 | Public
|
---|
| 124 | Override Function Seek(s As FileStream, offset As Int64, origin As SeekOrigin) As Int64
|
---|
| 125 | Seek = Super.Seek(s, offset, origin)
|
---|
| 126 | offset = Position(s)
|
---|
| 127 | End Function
|
---|
| 128 | Override Sub Position(s As FileStream, value As QWord)
|
---|
| 129 | Super.Position(s, value)
|
---|
| 130 | offset = value
|
---|
| 131 | End Sub
|
---|
| 132 | Override Function Position(s As FileStream) As QWord
|
---|
| 133 | Position = offset
|
---|
| 134 | End Function
|
---|
| 135 | Private
|
---|
| 136 | offset As QWord
|
---|
| 137 | End Class
|
---|
| 138 |
|
---|
| 139 | '---------------------------------------
|
---|
| 140 |
|
---|
| 141 | /*!
|
---|
| 142 | @brief 読み取り関数の集合
|
---|
| 143 | @date 2008/08/21
|
---|
| 144 | @auther Egtra
|
---|
| 145 | */
|
---|
| 146 | Class ReadFunctions
|
---|
| 147 | Public
|
---|
| 148 | Abstract Function CanRead() As Boolean
|
---|
| 149 | Abstract Function Read(s As FileStream, buffer As *Byte, offset As Long, count As Long) As Long
|
---|
| 150 | Abstract Function BeginRead(s As FileStream, buffer As *Byte, offset As Long, count As Long, callback As AsyncCallback, state As Object) As System.IAsyncResult
|
---|
| 151 | Abstract Function EndRead(s As FileStream, asyncResult As System.IAsyncResult) As Long
|
---|
| 152 | End Class
|
---|
| 153 |
|
---|
| 154 | /*!
|
---|
| 155 | @brief 読み取りできない実装
|
---|
| 156 | @date 2008/08/21
|
---|
| 157 | @auther Egtra
|
---|
| 158 | */
|
---|
| 159 | Class Unreadable
|
---|
| 160 | Inherits ReadFunctions
|
---|
| 161 | Public
|
---|
| 162 | Override Function CanRead() As Boolean
|
---|
| 163 | Return False
|
---|
| 164 | End Function
|
---|
| 165 |
|
---|
| 166 | Override Function Read(s As FileStream, buffer As *Byte, offset As Long, count As Long) As Long
|
---|
| 167 | Throw New NotSupportedException("FileStream.Read")
|
---|
| 168 | End Function
|
---|
| 169 |
|
---|
| 170 | Override Function BeginRead(s As FileStream, buffer As *Byte, offset As Long, count As Long, callback As AsyncCallback, state As Object) As System.IAsyncResult
|
---|
| 171 | Throw New NotSupportedException("FileStream.BeginRead")
|
---|
| 172 | End Function
|
---|
| 173 |
|
---|
| 174 | Override Function EndRead(s As FileStream, asyncResult As System.IAsyncResult) As Long
|
---|
| 175 | Throw New NotSupportedException("FileStream.EndRead")
|
---|
| 176 | End Function
|
---|
| 177 | End Class
|
---|
| 178 |
|
---|
| 179 | /*!
|
---|
| 180 | @brief 読み取りできる実装
|
---|
| 181 | @date 2008/08/21
|
---|
| 182 | @auther Egtra
|
---|
| 183 | */
|
---|
| 184 | Class Readable
|
---|
| 185 | Inherits ReadFunctions
|
---|
| 186 | Public
|
---|
| 187 | Override Function CanRead() As Boolean
|
---|
| 188 | Return True
|
---|
| 189 | End Function
|
---|
| 190 | Override Function Read(s As FileStream, buffer As *Byte, offset As Long, count As Long) As Long
|
---|
| 191 | Dim readBytes As DWord
|
---|
| 192 | Dim ret = ReadFile(s.Handle, VarPtr(buffer[offset]), count As DWord, VarPtr(readBytes), ByVal NULL)
|
---|
| 193 | If ret = FALSE Then
|
---|
| 194 | Detail.ThrowWinLastErrorIOException("FileStream.Read: Failed to read.")
|
---|
| 195 | End If
|
---|
| 196 | Read = readBytes As Long
|
---|
| 197 | End Function
|
---|
| 198 |
|
---|
| 199 | Override Function BeginRead(s As FileStream, buffer As *Byte, offset As Long, count As Long, callback As AsyncCallback, state As Object) As System.IAsyncResult
|
---|
| 200 | BeginRead = ThreadPoolIo(ToMBStr("ReadFile"), s, buffer, offset, count, callback, state)
|
---|
| 201 | End Function
|
---|
| 202 |
|
---|
| 203 | Override Function EndRead(s As FileStream, asyncResult As System.IAsyncResult) As Long
|
---|
| 204 | Dim ar = asyncResult As Detail.IAsyncStreamResult
|
---|
| 205 | EndRead = ar.WaitAndGetResult
|
---|
| 206 | End Function
|
---|
| 207 | End Class
|
---|
| 208 |
|
---|
| 209 | /*!
|
---|
| 210 | @brief 読み取りできる実装(重複IO用)
|
---|
| 211 | @date 2008/08/21
|
---|
| 212 | @auther Egtra
|
---|
| 213 | */
|
---|
| 214 | Class OverlappedReadable
|
---|
| 215 | Inherits Readable
|
---|
| 216 | Public
|
---|
| 217 | Override Function Read(s As FileStream, buffer As *Byte, offset As Long, count As Long) As Long
|
---|
| 218 | Read = EndRead(s, BeginRead(s, buffer, offset, count, Nothing, Nothing))
|
---|
| 219 | End Function
|
---|
| 220 |
|
---|
| 221 | Override Function BeginRead(s As FileStream, buffer As *Byte, offset As Long, count As Long, callback As AsyncCallback, state As Object) As System.IAsyncResult
|
---|
| 222 | BeginRead = BeginOverlappedIo(ToMBStr("ReadFile"), s, buffer, offset, count, callback, state)
|
---|
| 223 | If s.CanSeek Then
|
---|
| 224 | s.Seek(count, SeekOrigin.Current)
|
---|
| 225 | End If
|
---|
| 226 | End Function
|
---|
| 227 | End Class
|
---|
| 228 |
|
---|
| 229 | '---------------------------------------
|
---|
| 230 |
|
---|
| 231 | /*!
|
---|
| 232 | @brief 書き込み関数の集合
|
---|
| 233 | @date 2008/08/21
|
---|
| 234 | @auther Egtra
|
---|
| 235 | */
|
---|
| 236 | Class WriteFunctions
|
---|
| 237 | Public
|
---|
| 238 | Abstract Function CanWrite() As Boolean
|
---|
| 239 | Abstract Sub Write(s As FileStream, buffer As *Byte, offset As Long, count As Long)
|
---|
| 240 | Abstract Function BeginWrite(s As FileStream, buffer As *Byte, offset As Long, count As Long, callback As AsyncCallback, state As Object) As System.IAsyncResult
|
---|
| 241 | Abstract Sub EndWrite(s As FileStream, asyncResult As System.IAsyncResult)
|
---|
| 242 | End Class
|
---|
| 243 |
|
---|
| 244 | /*!
|
---|
| 245 | @brief 書き込みできない実装
|
---|
| 246 | @date 2008/08/21
|
---|
| 247 | @auther Egtra
|
---|
| 248 | */
|
---|
| 249 | Class Unwritable
|
---|
| 250 | Inherits WriteFunctions
|
---|
| 251 | Public
|
---|
| 252 | Override Function CanWrite() As Boolean
|
---|
| 253 | Return False
|
---|
| 254 | End Function
|
---|
| 255 |
|
---|
| 256 | Override Sub Write(s As FileStream, buffer As *Byte, offset As Long, count As Long)
|
---|
| 257 | Throw New NotSupportedException("FileStream.Write")
|
---|
| 258 | End Sub
|
---|
| 259 |
|
---|
| 260 | Override Function BeginWrite(s As FileStream, buffer As *Byte, offset As Long, count As Long, callback As AsyncCallback, state As Object) As System.IAsyncResult
|
---|
| 261 | Throw New NotSupportedException("FileStream.BeginWrite")
|
---|
| 262 | End Function
|
---|
| 263 |
|
---|
| 264 | Override Sub EndWrite(s As FileStream, asyncResult As System.IAsyncResult)
|
---|
| 265 | Throw New NotSupportedException("FileStream.EndWrite")
|
---|
| 266 | End Sub
|
---|
| 267 | End Class
|
---|
| 268 |
|
---|
| 269 | /*!
|
---|
| 270 | @brief 書き込みできる実装
|
---|
| 271 | @date 2008/08/21
|
---|
| 272 | @auther Egtra
|
---|
| 273 | */
|
---|
| 274 | Class Writable
|
---|
| 275 | Inherits WriteFunctions
|
---|
| 276 | Public
|
---|
| 277 | Override Function CanWrite() As Boolean
|
---|
| 278 | Return True
|
---|
| 279 | End Function
|
---|
| 280 |
|
---|
| 281 | Override Sub Write(s As FileStream, buffer As *Byte, offset As Long, count As Long)
|
---|
| 282 | Dim readBytes As DWord
|
---|
| 283 | Dim ret = WriteFile(s.Handle, VarPtr(buffer[offset]), count As DWord, VarPtr(readBytes), ByVal NULL)
|
---|
| 284 | If ret = FALSE Then
|
---|
| 285 | Detail.ThrowWinLastErrorIOException("FileStream.Write: Failed to write.")
|
---|
| 286 | End If
|
---|
| 287 | End Sub
|
---|
| 288 |
|
---|
| 289 | Override Function BeginWrite(s As FileStream, buffer As *Byte, offset As Long, count As Long, callback As AsyncCallback, state As Object) As System.IAsyncResult
|
---|
| 290 | BeginWrite = ThreadPoolIo(ToMBStr("WriteFile"), s, buffer, offset, count, callback, state)
|
---|
| 291 | End Function
|
---|
| 292 |
|
---|
| 293 | Override Sub EndWrite(s As FileStream, asyncResult As System.IAsyncResult)
|
---|
| 294 | Dim ar = asyncResult As Detail.IAsyncStreamResult
|
---|
| 295 | ar.WaitAndGetResult()
|
---|
| 296 | End Sub
|
---|
| 297 | End Class
|
---|
| 298 |
|
---|
| 299 | /*!
|
---|
| 300 | @brief 書き込みできる実装(重複IO用)
|
---|
| 301 | @date 2008/08/21
|
---|
| 302 | @auther Egtra
|
---|
| 303 | */
|
---|
| 304 | Class OverlappedWritable
|
---|
| 305 | Inherits Writable
|
---|
| 306 | Public
|
---|
| 307 | Override Sub Write(s As FileStream, buffer As *Byte, offset As Long, count As Long)
|
---|
| 308 | EndWrite(s, BeginWrite(s, buffer, offset, count, Nothing, Nothing))
|
---|
| 309 | End Sub
|
---|
| 310 |
|
---|
| 311 | Override Function BeginWrite(s As FileStream, buffer As *Byte, offset As Long, count As Long, callback As AsyncCallback, state As Object) As System.IAsyncResult
|
---|
| 312 | BeginWrite = BeginOverlappedIo(ToMBStr("WriteFile"), s, buffer, offset, count, callback, state)
|
---|
| 313 | If s.CanSeek Then
|
---|
| 314 | s.Seek(count, SeekOrigin.Current)
|
---|
| 315 | End If
|
---|
| 316 | End Function
|
---|
| 317 | End Class
|
---|
| 318 |
|
---|
| 319 | '---------------------------------------
|
---|
| 320 |
|
---|
| 321 | /*!
|
---|
| 322 | @brief 重複IO実行開始
|
---|
| 323 | @param[in] fn "ReadFile"か"WriteFile"または引数に互換性のあるkernel32の関数名
|
---|
| 324 | @param[in] s 対象のストリーム
|
---|
| 325 | @param[in,out] buffer 入出力先
|
---|
| 326 | @param[in] offset buffer内で入出力を開始する位置
|
---|
| 327 | @param[in] count 読み書きするバイト数
|
---|
| 328 | @param[in] callback 完了したときに呼ばれるデリゲート
|
---|
| 329 | @param[in] state IAsyncResultへの追加引数
|
---|
| 330 | @return EndRead/Writeへの引き換えとなるIAsyncResult
|
---|
| 331 | @date 2008/08/21
|
---|
| 332 | @auther Egtra
|
---|
| 333 | */
|
---|
| 334 | Function BeginOverlappedIo(fn As PCSTR, s As FileStream, buffer As *Byte, offset As Long, count As Long, callback As AsyncCallback, state As Object) As Detail.AsyncStreamResult
|
---|
| 335 | Dim ioFile = GetProcAddress(GetModuleHandle("kernel32.dll"), fn) As Detail.PIOFile
|
---|
| 336 | BeginOverlappedIo = New Detail.AsyncStreamResult(s.Handle, state)
|
---|
| 337 | Dim pov = BeginOverlappedIo.PtrToOverlapped
|
---|
| 338 | Dim position = s.Position
|
---|
| 339 | pov->Offset = LODWORD(position)
|
---|
| 340 | pov->OffsetHigh = HIDWORD(position)
|
---|
| 341 | position += count
|
---|
| 342 | If ioFile(s.Handle, buffer + offset, count, 0, pov) Then
|
---|
| 343 | BeginOverlappedIo.SetCompletedSynchronously()
|
---|
| 344 | Else
|
---|
| 345 | Dim lastError = GetLastError()
|
---|
| 346 | If lastError = ERROR_IO_PENDING Then
|
---|
| 347 | If Not ActiveBasic.IsNothing(callback) Then
|
---|
| 348 | Dim d = New Detail.CallbackData
|
---|
| 349 | d.Callback = callback
|
---|
| 350 | d.Result = BeginOverlappedIo
|
---|
| 351 | Threading.ThreadPool.RegisterWaitForSingleObject(BeginOverlappedIo.AsyncWaitHandle, AddressOf(CallAsyncCallbackB), d)
|
---|
| 352 | End If
|
---|
| 353 | Exit Function
|
---|
| 354 | ElseIf lastError = ERROR_HANDLE_EOF Then
|
---|
| 355 | BeginOverlappedIo.SetCompletedSynchronously()
|
---|
| 356 | BeginOverlappedIo.Handle = 0
|
---|
| 357 | BeginOverlappedIo.Result = 0
|
---|
| 358 | Else
|
---|
| 359 | Detail.ThrowWinIOException("AsyncFileStream", lastError)
|
---|
| 360 | End If
|
---|
| 361 | End If
|
---|
| 362 | If Not ActiveBasic.IsNothing(callback) Then
|
---|
| 363 | Dim d = New Detail.CallbackData
|
---|
| 364 | d.Callback = callback
|
---|
| 365 | d.Result = BeginOverlappedIo
|
---|
| 366 | Threading.ThreadPool.QueueUserWorkItem(AddressOf(CallAsyncCallback), d)
|
---|
| 367 | End If
|
---|
| 368 | End Function
|
---|
| 369 |
|
---|
| 370 | /*!
|
---|
| 371 | @brief BeginOverlappedIoのコールバック補助
|
---|
| 372 | @return EndRead/Writeへの引き換えとなるIAsyncResult
|
---|
| 373 | @date 2008/08/21
|
---|
| 374 | @auther Egtra
|
---|
| 375 | */
|
---|
| 376 | Sub CallAsyncCallbackB(o As Object, b As Boolean)
|
---|
| 377 | CallAsyncCallback(o)
|
---|
| 378 | End Sub
|
---|
| 379 |
|
---|
| 380 | /*!
|
---|
| 381 | @brief BeginOverlappedIoのコールバック補助
|
---|
| 382 | @return EndRead/Writeへの引き換えとなるIAsyncResult
|
---|
| 383 | @date 2008/08/21
|
---|
| 384 | @auther Egtra
|
---|
| 385 | */
|
---|
| 386 | Sub CallAsyncCallback(o As Object)
|
---|
| 387 | Dim d = o As Detail.CallbackData
|
---|
| 388 | Dim c = d.Callback
|
---|
| 389 | c(d.Result)
|
---|
| 390 | End Sub
|
---|
| 391 |
|
---|
| 392 | /*!
|
---|
| 393 | @brief Stream用IAsyncResult拡張
|
---|
| 394 | @date 2008/08/21
|
---|
| 395 | @auther Egtra
|
---|
| 396 | */
|
---|
| 397 | Interface IAsyncStreamResult
|
---|
| 398 | Inherits IAsyncResult
|
---|
| 399 | /*!
|
---|
| 400 | @brief 入出力完了まで待機する
|
---|
| 401 | @return 読み書きしたバイト数
|
---|
| 402 | */
|
---|
| 403 | Function WaitAndGetResult() As DWord
|
---|
| 404 | End Interface
|
---|
| 405 |
|
---|
| 406 | /*!
|
---|
| 407 | @brief IAsyncStreamResult実装用基底クラス
|
---|
| 408 | @date 2008/08/21
|
---|
| 409 | @auther Egtra
|
---|
| 410 | 2つの派生クラス、AsyncStreamResultとThreadPoolIoResultの共通部分
|
---|
| 411 | */
|
---|
| 412 | Class AsyncStreamResultImplBase
|
---|
| 413 | Implements IAsyncStreamResult
|
---|
| 414 | Protected
|
---|
| 415 | Sub AsyncStreamResultImplBase(state As Object)
|
---|
| 416 | Imports System.Threading
|
---|
| 417 | wait = New EventWaitHandle(False, EventResetMode.ManualReset)
|
---|
| 418 | s = state
|
---|
| 419 | End Sub
|
---|
| 420 | Public
|
---|
| 421 | Virtual Function AsyncWaitHandle() As Threading.WaitHandle
|
---|
| 422 | AsyncWaitHandle = wait
|
---|
| 423 | End Function
|
---|
| 424 |
|
---|
| 425 | Virtual Function CompletedSynchronously() As Boolean
|
---|
| 426 | End Function
|
---|
| 427 |
|
---|
| 428 | Virtual Function IsCompleted() As Boolean
|
---|
| 429 | IsCompleted = AsyncWaitHandle.WaitOne(0)
|
---|
| 430 | End Function
|
---|
| 431 |
|
---|
| 432 | Virtual Function AsyncState() As Object
|
---|
| 433 | AsyncState = s
|
---|
| 434 | End Function
|
---|
| 435 |
|
---|
| 436 | Virtual Function WaitAndGetResult() As DWord
|
---|
| 437 | End Function
|
---|
| 438 |
|
---|
| 439 | Function AsyncEventWaitHandle() As Threading.EventWaitHandle
|
---|
| 440 | AsyncEventWaitHandle = wait
|
---|
| 441 | End Function
|
---|
| 442 | Private
|
---|
| 443 | wait As Threading.EventWaitHandle
|
---|
| 444 | s As Object
|
---|
| 445 | End Class
|
---|
| 446 |
|
---|
| 447 | /*!
|
---|
| 448 | @brief 重複IO用IAsyncStreamResult実装
|
---|
| 449 | @date 2008/08/21
|
---|
| 450 | @auther Egtra
|
---|
| 451 | */
|
---|
| 452 | Class AsyncStreamResult
|
---|
| 453 | Inherits AsyncStreamResultImplBase
|
---|
| 454 | Public
|
---|
| 455 | Sub AsyncStreamResult(handle As HANDLE, state As Object)
|
---|
| 456 | AsyncStreamResultImplBase(state)
|
---|
| 457 | h = handle
|
---|
| 458 | cs = False
|
---|
| 459 | overlapped.hEvent = AsyncWaitHandle.Handle
|
---|
| 460 | End Sub
|
---|
| 461 |
|
---|
| 462 | Override Function CompletedSynchronously() As Boolean
|
---|
| 463 | CompletedSynchronously = cs
|
---|
| 464 | End Function
|
---|
| 465 |
|
---|
| 466 | Sub SetCompletedSynchronously()
|
---|
| 467 | cs = True
|
---|
| 468 | wait.Set()
|
---|
| 469 | End Sub
|
---|
| 470 |
|
---|
| 471 | Override Function WaitAndGetResult() As DWord
|
---|
| 472 | If h <> 0 Then
|
---|
| 473 | If GetOverlappedResult(h, overlapped, result, TRUE) = FALSE Then
|
---|
| 474 | Detail.ThrowWinLastErrorIOException("FileStream.EndRead/Write")
|
---|
| 475 | End If
|
---|
| 476 | h = 0
|
---|
| 477 | End If
|
---|
| 478 | WaitAndGetResult = result
|
---|
| 479 | End Function
|
---|
| 480 |
|
---|
| 481 | Function PtrToOverlapped() As *OVERLAPPED
|
---|
| 482 | PtrToOverlapped = VarPtr(overlapped)
|
---|
| 483 | End Function
|
---|
| 484 |
|
---|
| 485 | Sub Handle(handle As HANDLE)
|
---|
| 486 | h = handle
|
---|
| 487 | End Sub
|
---|
| 488 |
|
---|
| 489 | '同期IO用
|
---|
| 490 | Sub Result(res As DWord)
|
---|
| 491 | result = res
|
---|
| 492 | End Sub
|
---|
| 493 | Private
|
---|
| 494 | overlapped As OVERLAPPED
|
---|
| 495 | h As HANDLE
|
---|
| 496 | result As DWord
|
---|
| 497 | cs As Boolean
|
---|
| 498 | End Class
|
---|
| 499 |
|
---|
| 500 | /*!
|
---|
| 501 | @brief ThreadPoolIo用IAsyncStreamResult実装
|
---|
| 502 | @date 2008/08/21
|
---|
| 503 | @auther Egtra
|
---|
| 504 | ThreadPoolIo関数も参照
|
---|
| 505 | */
|
---|
| 506 | Class ThreadPoolIoResult
|
---|
| 507 | Inherits AsyncStreamResultImplBase
|
---|
| 508 | Public
|
---|
| 509 | Sub ThreadPoolIoResult(state As Object)
|
---|
| 510 | AsyncStreamResultImplBase(state)
|
---|
| 511 | End Sub
|
---|
| 512 |
|
---|
| 513 | Override Function CompletedSynchronously() As Boolean
|
---|
| 514 | CompletedSynchronously = False
|
---|
| 515 | End Function
|
---|
| 516 |
|
---|
| 517 | Override Function WaitAndGetResult() As DWord
|
---|
| 518 | AsyncWaitHandle.WaitOne()
|
---|
| 519 | If Not ActiveBasic.IsNothing(ex) Then
|
---|
| 520 | Throw ex
|
---|
| 521 | End If
|
---|
| 522 | WaitAndGetResult = Result
|
---|
| 523 | End Function
|
---|
| 524 |
|
---|
| 525 | Sub SetException(e As Exception)
|
---|
| 526 | ex = e
|
---|
| 527 | End Sub
|
---|
| 528 |
|
---|
| 529 | Result As DWord
|
---|
| 530 | Private
|
---|
| 531 | ex As Exception
|
---|
| 532 | End Class
|
---|
| 533 |
|
---|
| 534 | /*!
|
---|
| 535 | @brief Stream用同期IAsyncStreamResult実装
|
---|
| 536 | @date 2008/08/21
|
---|
| 537 | @auther Egtra
|
---|
| 538 | StreamでのBeginRead/Writeの実装は、常にBegin内部で同期的に処理するというもの。これはそれ用の実装。
|
---|
| 539 | */
|
---|
| 540 | Class SyncStreamResultImpl
|
---|
| 541 | Implements IAsyncStreamResult
|
---|
| 542 | Public
|
---|
| 543 | Sub SyncStreamResultImpl(result As DWord, state As Object)
|
---|
| 544 | Imports System.Threading
|
---|
| 545 | wait = New EventWaitHandle(False, EventResetMode.ManualReset)
|
---|
| 546 | s = state
|
---|
| 547 | End Sub
|
---|
| 548 |
|
---|
| 549 | Virtual Function AsyncWaitHandle() As Threading.WaitHandle
|
---|
| 550 | Imports System.Threading
|
---|
| 551 | If ActiveBasic.IsNothing(wait) Then
|
---|
| 552 | wait = New EventWaitHandle(True, EventResetMode.ManualReset)
|
---|
| 553 | End If
|
---|
| 554 | AsyncWaitHandle = wait
|
---|
| 555 | End Function
|
---|
| 556 |
|
---|
| 557 | Virtual Function CompletedSynchronously() As Boolean
|
---|
| 558 | CompletedSynchronously = True
|
---|
| 559 | End Function
|
---|
| 560 |
|
---|
| 561 | Virtual Function IsCompleted() As Boolean
|
---|
| 562 | IsCompleted = True
|
---|
| 563 | End Function
|
---|
| 564 |
|
---|
| 565 | Virtual Function AsyncState() As Object
|
---|
| 566 | AsyncState = s
|
---|
| 567 | End Function
|
---|
| 568 |
|
---|
| 569 | Virtual Function WaitAndGetResult() As DWord
|
---|
| 570 | WaitAndGetResult = res
|
---|
| 571 | End Function
|
---|
| 572 |
|
---|
| 573 | Function AsyncEventWaitHandle() As Threading.EventWaitHandle
|
---|
| 574 | AsyncEventWaitHandle = wait
|
---|
| 575 | End Function
|
---|
| 576 | Private
|
---|
| 577 | s As Object
|
---|
| 578 | res As DWord
|
---|
| 579 |
|
---|
| 580 | Static wait = Nothing As Threading.EventWaitHandle
|
---|
| 581 | End Class
|
---|
| 582 |
|
---|
| 583 | /*!
|
---|
| 584 | @brief ReadFile/WriteFileのプロトタイプに一致する関数へのポインタ
|
---|
| 585 | @date 2008/08/21
|
---|
| 586 | @auther Egtra
|
---|
| 587 | */
|
---|
| 588 | TypeDef PIOFile = *Function(h As HANDLE, buf As VoidPtr, bytes As DWord, result As *DWord, ov As *OVERLAPPED) As BOOL
|
---|
| 589 |
|
---|
| 590 | /*!
|
---|
| 591 | @brief BeginOverlappedIoとCallAsyncCallbackとの間で受け渡されるデータの集まり
|
---|
| 592 | @date 2008/08/21
|
---|
| 593 | @auther Egtra
|
---|
| 594 | */
|
---|
| 595 | Class CallbackData
|
---|
| 596 | Public
|
---|
| 597 | Callback As AsyncCallback
|
---|
| 598 | Result As IAsyncResult
|
---|
| 599 | End Class
|
---|
| 600 |
|
---|
| 601 | '---------------------------------------
|
---|
| 602 |
|
---|
| 603 | /*!
|
---|
| 604 | @brief スレッドプールによる非同期IO
|
---|
| 605 | @date 2008/08/21
|
---|
| 606 | @param[in] fn "ReadFile"か"WriteFile"または引数に互換性のあるkernel32の関数名
|
---|
| 607 | @param[in] s 対象のストリーム
|
---|
| 608 | @param[in,out] buffer 入出力先
|
---|
| 609 | @param[in] offset buffer内で入出力を開始する位置
|
---|
| 610 | @param[in] count 読み書きするバイト数
|
---|
| 611 | @param[in] callback 完了したときに呼ばれるデリゲート
|
---|
| 612 | @param[in] state IAsyncResultへの追加引数
|
---|
| 613 | @return EndRead/Writeへの引き換えとなるIAsyncResult
|
---|
| 614 | @auther Egtra
|
---|
| 615 | OVERLAPPED指定無しで開いたファイルの非同期関数用
|
---|
| 616 | */
|
---|
| 617 | Function ThreadPoolIo(ioType As PCSTR, s As FileStream, buffer As *Byte, offset As Long, count As Long, callback As AsyncCallback, state As Object) As System.IAsyncResult
|
---|
| 618 | Dim result = New ThreadPoolIoResult(state)
|
---|
| 619 | ThreadPoolIo = result
|
---|
| 620 | Dim d = New ThreadPoolIoData
|
---|
| 621 | With d
|
---|
| 622 | .IoType = ioType
|
---|
| 623 | .Handle = s.Handle
|
---|
| 624 | .Result = result
|
---|
| 625 | .Buffer = buffer + offset
|
---|
| 626 | .Size = count As DWord
|
---|
| 627 | End With
|
---|
| 628 | Threading.ThreadPool.QueueUserWorkItem(AddressOf(ThreadIo), d)
|
---|
| 629 | End Function
|
---|
| 630 |
|
---|
| 631 | /*!
|
---|
| 632 | @brief ThreadPoolIo補助で実際に入出力関数を呼ぶ
|
---|
| 633 | @date 2008/08/21
|
---|
| 634 | @auther Egtra
|
---|
| 635 | */
|
---|
| 636 | Sub ThreadIo(o As Object)
|
---|
| 637 | Dim d = o As ThreadPoolIoData
|
---|
| 638 | With d
|
---|
| 639 | Dim ioFile = GetProcAddress(GetModuleHandle("kernel32.dll"), .IoType) As Detail.PIOFile
|
---|
| 640 | If ioFile(.Handle, .Buffer, .Size, VarPtr(.Result.Result), 0) = FALSE Then
|
---|
| 641 | .Result.SetException(Detail.GetWinLastErrorIOException("FileStream.BeginRead/Write"))
|
---|
| 642 | End If
|
---|
| 643 | d.Result.AsyncEventWaitHandle.Set()
|
---|
| 644 | If Not ActiveBasic.IsNothing(.Callback) Then
|
---|
| 645 | Dim c = .Callback
|
---|
| 646 | c(.Result)
|
---|
| 647 | End If
|
---|
| 648 | End With
|
---|
| 649 | End Sub
|
---|
| 650 |
|
---|
| 651 | /*!
|
---|
| 652 | @brief ThreadPoolIoとThreadIoとの間で受け渡すデータの集まり
|
---|
| 653 | @date 2008/08/21
|
---|
| 654 | @auther Egtra
|
---|
| 655 | */
|
---|
| 656 | Class ThreadPoolIoData
|
---|
| 657 | Public
|
---|
| 658 | IoType As PCSTR
|
---|
| 659 | Handle As HANDLE
|
---|
| 660 | Result As ThreadPoolIoResult
|
---|
| 661 | Callback As AsyncCallback
|
---|
| 662 | Buffer As *Byte
|
---|
| 663 | Size As DWord
|
---|
| 664 | End Class
|
---|
| 665 |
|
---|
| 666 | End Namespace
|
---|
| 667 | End Namespace
|
---|
| 668 | End Namespace
|
---|