| 1 | #Region "Microsoft.VisualBasic::70b1299aaf4649ed5572809387bb9ae1, Microsoft.VisualBasic.Core\ApplicationServices\Tools\Win32\PriorityClass.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 | ' Module PriorityClass |
| 35 | ' |
| 36 | ' Function: PriorityClass |
| 37 | ' |
| 38 | ' |
| 39 | ' /********************************************************************************/ |
| 40 | |
| 41 | #End Region |
| 42 | |
| 43 | Namespace Win32 |
| 44 | |
| 45 | ''' <summary> |
| 46 | ''' Process priority class helper. |
| 47 | ''' </summary> |
| 48 | Public Module PriorityClass |
| 49 | |
| 50 | ''' <summary> |
| 51 | ''' 当前进程句柄 |
| 52 | ''' </summary> |
| 53 | ''' <returns></returns> |
| 54 | Public Declare Function GetCurrentProcess Lib "kernel32" () As Integer |
| 55 | Public Declare Function SetPriorityClass Lib "kernel32" (hProcess As Integer, dwPriorityClass As Integer) As Integer |
| 56 | |
| 57 | ''' <summary> |
| 58 | ''' 新进程应该有非常低的优先级——只有在系统空闲的时候才能运行。基本值是4 |
| 59 | ''' </summary> |
| 60 | Public Const IDLE_PRIORITY_CLASS = &H40 |
| 61 | ''' <summary> |
| 62 | ''' 新进程有非常高的优先级,它优先于大多数应用程序。基本值是13。注意尽量避免采用这个优先级 |
| 63 | ''' </summary> |
| 64 | Public Const HIGH_PRIORITY_CLASS = &H80 |
| 65 | ''' <summary> |
| 66 | ''' 标准优先级。如进程位于前台,则基本值是9;如在后台,则优先值是7 |
| 67 | ''' </summary> |
| 68 | Public Const NORMAL_PRIORITY_CLASS = &H20 |
| 69 | |
| 70 | ''' <summary> |
| 71 | ''' Set Priority Class for current process. |
| 72 | ''' </summary> |
| 73 | ''' <param name="priority"><see cref="IDLE_PRIORITY_CLASS"/>, <see cref="HIGH_PRIORITY_CLASS"/>, <see cref="NORMAL_PRIORITY_CLASS"/></param> |
| 74 | ''' <returns></returns> |
| 75 | Public Function PriorityClass(priority As Integer) As Boolean |
| 76 | Dim CurrentProcesshWnd As Integer = GetCurrentProcess |
| 77 | |
| 78 | If (SetPriorityClass(CurrentProcesshWnd, priority) = 0) Then |
| 79 | Return False |
| 80 | Else |
| 81 | Return True |
| 82 | End If |
| 83 | End Function |
| 84 | End Module |
| 85 | End Namespace |