| 1 | #Region "Microsoft.VisualBasic::6b4ce6d00a21f82f2b63a7ceb8870138, Microsoft.VisualBasic.Core\ApplicationServices\Parallel\MMFProtocol\MapStream\MSWriter.vb" |
| 2 | |
| 3 | ' Author: |
| 4 | ' |
| 5 | ' asuka (amethyst.asuka@gcmodeller.org) |
| 6 | ' xie (genetics@smrucc.org) |
| 7 | ' xieguigang (xie.guigang@live.com) |
| 8 | ' |
| 9 | ' Copyright (c) 2018 GPL3 Licensed |
| 10 | ' |
| 11 | ' |
| 12 | ' GNU GENERAL PUBLIC LICENSE (GPL3) |
| 13 | ' |
| 14 | ' |
| 15 | ' This program is free software: you can redistribute it and/or modify |
| 16 | ' it under the terms of the GNU General Public License as published by |
| 17 | ' the Free Software Foundation, either version 3 of the License, or |
| 18 | ' (at your option) any later version. |
| 19 | ' |
| 20 | ' This program is distributed in the hope that it will be useful, |
| 21 | ' but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 22 | ' MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 23 | ' GNU General Public License for more details. |
| 24 | ' |
| 25 | ' You should have received a copy of the GNU General Public License |
| 26 | ' along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 27 | |
| 28 | |
| 29 | |
| 30 | ' /********************************************************************************/ |
| 31 | |
| 32 | ' Summaries: |
| 33 | |
| 34 | ' Class MSWriter |
| 35 | ' |
| 36 | ' Constructor: (+1 Overloads) Sub New |
| 37 | ' |
| 38 | ' Function: ToString |
| 39 | ' |
| 40 | ' Sub: WriteStream |
| 41 | ' |
| 42 | ' Class MMFStream |
| 43 | ' |
| 44 | ' Properties: byteData, udtBadge |
| 45 | ' |
| 46 | ' Constructor: (+2 Overloads) Sub New |
| 47 | ' Function: Serialize, ToString |
| 48 | ' |
| 49 | ' |
| 50 | ' /********************************************************************************/ |
| 51 | |
| 52 | #End Region |
| 53 | |
| 54 | Imports System.IO |
| 55 | Imports Microsoft.VisualBasic.Net.Protocols |
| 56 | |
| 57 | Namespace Parallel.MMFProtocol.MapStream |
| 58 | |
| 59 | #Region "Nested Type Definitions" |
| 60 | |
| 61 | ''' <summary> |
| 62 | ''' |
| 63 | ''' </summary> |
| 64 | ''' <remarks> |
| 65 | ''' mmfServer的主要功能是创建并维护一个内存映射文件 |
| 66 | ''' </remarks> |
| 67 | Public Class MSWriter : Inherits IMapBase |
| 68 | |
| 69 | ''' <summary> |
| 70 | ''' |
| 71 | ''' </summary> |
| 72 | ''' <param name="uri"></param> |
| 73 | ''' <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> |
| 74 | Sub New(uri As String, chunkSize As Long) |
| 75 | Call MyBase.New(uri, chunkSize) |
| 76 | |
| 77 | Try |
| 78 | _mmfileStream = |
| 79 | MemoryMappedFiles.MemoryMappedFile.CreateNew( |
| 80 | uri, chunkSize) |
| 81 | Catch ex As Exception |
| 82 | _mmfileStream = |
| 83 | MemoryMappedFiles.MemoryMappedFile.CreateOrOpen( |
| 84 | uri, chunkSize) |
| 85 | Finally |
| 86 | End Try |
| 87 | End Sub |
| 88 | |
| 89 | Public Sub WriteStream(byteData As Byte()) |
| 90 | If Not byteData.IsNullOrEmpty Then |
| 91 | Call _mmfileStream.CreateViewStream.Write( |
| 92 | byteData, Scan0, byteData.Length) |
| 93 | End If |
| 94 | End Sub |
| 95 | |
| 96 | Public Overrides Function ToString() As String |
| 97 | Return Uri |
| 98 | End Function |
| 99 | End Class |
| 100 | |
| 101 | <Serializable> Public Class MMFStream : Inherits RawStream |
| 102 | |
| 103 | ''' <summary> |
| 104 | ''' Stamp; Update Badge |
| 105 | ''' </summary> |
| 106 | Public Property udtBadge As Long |
| 107 | |
| 108 | ''' <summary> |
| 109 | ''' 内存映射文件中所存储的将要进行进程间交换的数据 |
| 110 | ''' </summary> |
| 111 | ''' <remarks></remarks> |
| 112 | Public Property byteData As Byte() |
| 113 | |
| 114 | Sub New() |
| 115 | End Sub |
| 116 | |
| 117 | Sub New(rawStream As Byte()) |
| 118 | Dim bytTmp As Byte() = New Byte(INT64 - 1) {} |
| 119 | Call Array.ConstrainedCopy(rawStream, Scan0, bytTmp, Scan0, bytTmp.Length) |
| 120 | udtBadge = BitConverter.ToInt64(bytTmp, Scan0) |
| 121 | Dim bytLen As Integer = rawStream.Length - bytTmp.Length |
| 122 | bytTmp = New Byte(bytLen - 1) {} |
| 123 | Call Array.ConstrainedCopy(rawStream, INT64, bytTmp, Scan0, bytLen) |
| 124 | byteData = bytTmp |
| 125 | End Sub |
| 126 | |
| 127 | Public Overrides Function ToString() As String |
| 128 | Return $"{NameOf(udtBadge)}:={udtBadge} // {NameOf(byteData)}:={byteData.Length} bytes...." |
| 129 | End Function |
| 130 | |
| 131 | Public Overrides Function Serialize() As Byte() |
| 132 | Dim ChunkBuffer As Byte() = New Byte(INT64 + byteData.Length - 1) {} |
| 133 | Call Array.ConstrainedCopy(BitConverter.GetBytes(udtBadge), Scan0, ChunkBuffer, Scan0, INT64) |
| 134 | Call Array.ConstrainedCopy(byteData, Scan0, ChunkBuffer, INT64, byteData.Length) |
| 135 | |
| 136 | Return ChunkBuffer |
| 137 | End Function |
| 138 | End Class |
| 139 | #End Region |
| 140 | End Namespace |