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 |