137 lines
4.4 KiB
VB.net
137 lines
4.4 KiB
VB.net
#Region "Microsoft.VisualBasic::6b4ce6d00a21f82f2b63a7ceb8870138, Microsoft.VisualBasic.Core\ApplicationServices\Parallel\MMFProtocol\MapStream\MSWriter.vb"
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' Author:
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'
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' asuka (amethyst.asuka@gcmodeller.org)
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' xie (genetics@smrucc.org)
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' xieguigang (xie.guigang@live.com)
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'
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' Copyright (c) 2018 GPL3 Licensed
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'
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'
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' GNU GENERAL PUBLIC LICENSE (GPL3)
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'
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'
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' This program is free software: you can redistribute it and/or modify
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' it under the terms of the GNU General Public License as published by
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' the Free Software Foundation, either version 3 of the License, or
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' (at your option) any later version.
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'
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' This program is distributed in the hope that it will be useful,
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' but WITHOUT ANY WARRANTY; without even the implied warranty of
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' MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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' GNU General Public License for more details.
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'
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' You should have received a copy of the GNU General Public License
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' along with this program. If not, see <http://www.gnu.org/licenses/>.
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' /********************************************************************************/
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' Summaries:
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' Class MSWriter
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'
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' Constructor: (+1 Overloads) Sub New
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'
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' Function: ToString
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'
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' Sub: WriteStream
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'
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' Class MMFStream
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'
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' Properties: byteData, udtBadge
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'
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' Constructor: (+2 Overloads) Sub New
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' Function: Serialize, ToString
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'
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'
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' /********************************************************************************/
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#End Region
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Imports System.IO
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Imports Microsoft.VisualBasic.Net.Protocols
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Namespace Parallel.MMFProtocol.MapStream
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#Region "Nested Type Definitions"
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''' <summary>
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''' Memory stream writer
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''' </summary>
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''' <remarks>
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''' mmfServer的主要功能是创建并维护一个内存映射文件
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''' </remarks>
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Public Class MSWriter : Inherits MapStream
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''' <summary>
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'''
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''' </summary>
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''' <param name="uri"></param>
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''' <remarks>对象实例会首先尝试以服务器的角色建立连接，当不成功的时候会以客户端的形式建立连接</remarks>
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Sub New(uri As String, chunkSize As Long)
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Call MyBase.New(uri, chunkSize)
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Try
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file = MemoryMappedFiles.MemoryMappedFile.CreateNew(uri, chunkSize)
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Catch ex As Exception
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file = MemoryMappedFiles.MemoryMappedFile.CreateOrOpen(uri, chunkSize)
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Finally
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End Try
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End Sub
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Public Sub WriteStream(byteData As Byte())
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If Not byteData.IsNullOrEmpty Then
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Call file.CreateViewStream.Write(
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byteData, Scan0, byteData.Length)
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End If
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End Sub
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Public Overrides Function ToString() As String
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Return Uri
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End Function
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End Class
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<Serializable> Public Class MMFStream : Inherits RawStream
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''' <summary>
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''' Stamp; Update Badge
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''' </summary>
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Public Property udtBadge As Long
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''' <summary>
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''' 内存映射文件中所存储的将要进行进程间交换的数据
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''' </summary>
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''' <remarks></remarks>
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Public Property byteData As Byte()
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Sub New()
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End Sub
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Sub New(rawStream As Byte())
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Dim bytTmp As Byte() = New Byte(INT64 - 1) {}
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Call Array.ConstrainedCopy(rawStream, Scan0, bytTmp, Scan0, bytTmp.Length)
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udtBadge = BitConverter.ToInt64(bytTmp, Scan0)
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Dim bytLen As Integer = rawStream.Length - bytTmp.Length
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bytTmp = New Byte(bytLen - 1) {}
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Call Array.ConstrainedCopy(rawStream, INT64, bytTmp, Scan0, bytLen)
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byteData = bytTmp
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End Sub
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Public Overrides Function ToString() As String
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Return $"{NameOf(udtBadge)}:={udtBadge} // {NameOf(byteData)}:={byteData.Length} bytes...."
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End Function
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Public Overrides Function Serialize() As Byte()
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Dim ChunkBuffer As Byte() = New Byte(INT64 + byteData.Length - 1) {}
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Call Array.ConstrainedCopy(BitConverter.GetBytes(udtBadge), Scan0, ChunkBuffer, Scan0, INT64)
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Call Array.ConstrainedCopy(byteData, Scan0, ChunkBuffer, INT64, byteData.Length)
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Return ChunkBuffer
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End Function
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End Class
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#End Region
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End Namespace
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