在VB中如何让线程或进程在指定的CPU上运行

Option Explicit

Private Declare Function WTSEnumerateProcesses Lib "wtsapi32.dll" Alias "WTSEnumerateProcessesA" (ByVal hServer As Long, ByVal Reserved As Long, ByVal Version As Long, ByRef ppProcessInfo As Long, ByRef pCount As Long) As Long
Private Declare Function SetProcessAffinityMask Lib "kernel32.dll" (ByVal hProcess As Long, ByVal dwProcessAffinityMask As Long) As Long
Private Declare Function OpenProcess Lib "kernel32.dll" (ByVal dwDesiredAccess As Long, ByVal bInheritHandle As Long, ByVal dwProcId As Long) As Long
Private Declare Sub WTSFreeMemory Lib "wtsapi32.dll" (ByVal pMemory As Long)
Private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (Destination As Any, Source As Any, ByVal Length As Long)
Private Const WTS_CURRENT_SERVER_HANDLE = 0&
Private Type WTS_PROCESS_INFO
SessionID As Long
ProcessID As Long
pProcessName As Long
pUserSid As Long
End Type

Public Sub Main()
Call SetAffinityByEXE("notepad.exe")
End Sub

Private Sub SetAffinityByEXE(strImageName As String)
Const PROCESS_QUERY_INFORMATION = 1024
Const PROCESS_VM_READ = 16
Const MAX_PATH = 260
Const STANDARD_RIGHTS_REQUIRED = &HF0000
Const SYNCHRONIZE = &H100000
Const PROCESS_ALL_ACCESS = &H1F0FFF
Const TH32CS_SNAPPROCESS = &H2&
Const hNull = 0
Const WIN95_System_Found = 1
Const WINNT_System_Found = 2
Const Default_Log_Size = 10000000
Const Default_Log_Days = 0
Const SPECIFIC_RIGHTS_ALL = &HFFFF
Const STANDARD_RIGHTS_ALL = &H1F0000

Dim BitMasks() As Long, NumMasks As Long, LoopMasks As Long
Dim MyMask As Long
Const AffinityMask As Long = &HF ' 00001111b

Dim lngPID As Long
Dim lngHwndProcess
lngPID = GetProcessID(strImageName)

If lngPID = 0 Then
MsgBox "Could Not Get process ID of " & strImageName, vbCritical, "Error"
Exit Sub
End If
lngHwndProcess = OpenProcess(PROCESS_ALL_ACCESS, 0, lngPID)
If lngHwndProcess = 0 Then
MsgBox "Could Not obtain a handle For the Process ID: " & lngPID, vbCritical, "Error"
Exit Sub
End If
BitMasks() = GetBitMasks(AffinityMask)

'Use CPU0
MyMask = BitMasks(0)
'Use CPU1
'MyMask = BitMasks(1)
'Use CPU0 and CPU1
'MyMask = BitMasks(0) Or BitMasks(1)
'The CPUs to use are specified by the array index.
'To use CPUs 0, 2, and 4, you would use:
'MyMask = BitMasks(0) Or BitMasks(2) Or BitMasks(4)
'To Set Affinity, pass the application h
'     andle and your custom affinity mask:
'SetProcessAffinityMask(lngHwndProcess,
'     MyMask)
'Use GetCurrentProcess() API instead of
'     lngHwndProcess to set affinity on the current app.

If SetProcessAffinityMask(lngHwndProcess, MyMask) = 1 Then
MsgBox "Affinity Set", vbInformation, "Success"
Else
MsgBox "Failed To Set Affinity", vbCritical, "Failure"
End If
End Sub

Private Function GetBitMasks(ByVal inValue As Long) As Long()
Dim RetArr() As Long, NumRet As Long
Dim LoopBits As Long, BitMask As Long
Const HighBit As Long = &H80000000
ReDim RetArr(0 To 31) As Long

For LoopBits = 0 To 30
BitMask = 2 ^ LoopBits
If (inValue And BitMask) Then
RetArr(NumRet) = BitMask
NumRet = NumRet + 1
End If
Next LoopBits
If (inValue And HighBit) Then
RetArr(NumRet) = HighBit
NumRet = NumRet + 1
End If
If (NumRet > 0) Then ' Trim unused array items and return array
If (NumRet < 32) Then ReDim Preserve RetArr(0 To NumRet - 1) As Long
GetBitMasks = RetArr
End If
End Function

Private Function GetProcessID(strProcessName As String) As Long
Dim RetVal As Long
Dim Count As Long
Dim i As Integer
Dim lpBuffer As Long
Dim p As Long
Dim udtProcessInfo As WTS_PROCESS_INFO
Dim lngProcessID As Long
Dim strTempProcessName As String

RetVal = WTSEnumerateProcesses(WTS_CURRENT_SERVER_HANDLE, 0&, 1, lpBuffer, Count)
If RetVal Then ' WTSEnumerateProcesses was successful
p = lpBuffer
For i = 1 To Count
' Count is the number of Structures in the buffer
' WTSEnumerateProcesses returns a pointer, so copy it to a
' WTS_PROCESS_INO UDT so you can access its members
CopyMemory udtProcessInfo, ByVal p, LenB(udtProcessInfo)
' Add items to the ListView control
lngProcessID = CLng(udtProcessInfo.ProcessID)
' Since pProcessName contains a pointer,call GetStringFromLP to get the
' variable length string it points to
If udtProcessInfo.ProcessID = 0 Then
'MsgBox "System Idle Process"
Else
strTempProcessName = GetStringFromLP(udtProcessInfo.pProcessName)
If UCase(strTempProcessName) = UCase(strProcessName) Then
GetProcessID = lngProcessID
End If
End If
p = p + LenB(udtProcessInfo)
Next i
WTSFreeMemory lpBuffer 'Free your memory buffer
Else
MsgBox "Error", vbCritical, "Fatal Error"
End If
End Function

Private Function GetStringFromLP(ByVal StrPtr As Long) As String
Dim b As Byte
Dim tempStr As String
Dim bufferStr As String
Dim Done As Boolean

Done = False
Do
' Get the byte/character that StrPtr is pointing to.
CopyMemory b, ByVal StrPtr, 1
If b = 0 Then ' If you've found a null character, then you're done.
Done = True
Else
tempStr = Chr$(b) ' Get the character For the byte's value
bufferStr = bufferStr & tempStr 'Add it To the String
StrPtr = StrPtr + 1 ' Increment the pointer To Next byte/char
End If
Loop Until Done
GetStringFromLP = bufferStr
End Function