[英]RunSpacePool how do i pass a shared variable?
我正在嘗試創建一個線程,該線程將使用共享變量(在主會話和線程之間),並賦予線程使用主代碼中外部函數的能力
我設法通過函數供線程使用,我設法通過只讀變量。 我的問題是,如果我在線程內更改變量的值,然后嘗試從主會話讀取它-我看不到值的更改,因此無法共享。
我怎么做? 我的目標是最終擁有一個線程。
這是我的代碼:
$x = [Hashtable]::Synchronized(@{})
$global:yo
Function ConvertTo-Hex {
#Write-Output "Function Ran"
write-host "hi"
$x.host.ui.WriteVerboseLine("===========")
write-host $yo
$global:yo = "test"
write-host $yo
}
#endregion
ls
# create an array and add it to session state
$arrayList = New-Object System.Collections.ArrayList
$arrayList.AddRange(('a','b','c','d','e'))
$x.host = $host
$sessionstate = [system.management.automation.runspaces.initialsessionstate]::CreateDefault()
$sessionstate.Variables.Add((New-Object System.Management.Automation.Runspaces.SessionStateVariableEntry('arrayList', $arrayList, $null)))
$sessionstate.Variables.Add((New-Object System.Management.Automation.Runspaces.SessionStateVariableEntry('x', $x, $null)))
$sessionstate.Variables.Add((New-Object System.Management.Automation.Runspaces.SessionStateVariableEntry('yo', $yo, $null)))
$sessionstate.Commands.Add((New-Object System.Management.Automation.Runspaces.SessionStateFunctionEntry -ArgumentList 'ConvertTo-Hex', (Get-Content Function:\ConvertTo-Hex -ErrorAction Stop)))
$runspacepool = [runspacefactory]::CreateRunspacePool(1, 2, $sessionstate, $Host)
$runspacepool.Open()
$ps1 = [powershell]::Create()
$ps1.RunspacePool = $runspacepool
$ps1.AddScript({
for ($i = 1; $i -le 15; $i++)
{
$letter = Get-Random -InputObject (97..122) | % {[char]$_} # a random lowercase letter
$null = $arrayList.Add($letter)
start-sleep -s 1
}
})
# on the first thread start a process that adds values to $arrayList every second
$handle1 = $ps1.BeginInvoke()
# now on the second thread, output the value of $arrayList every 1.5 seconds
$ps2 = [powershell]::Create()
$ps2.RunspacePool = $runspacepool
$ps2.AddScript({
Write-Host "ArrayList contents is "
foreach ($i in $arrayList)
{
Write-Host $i -NoNewline
Write-Host " " -NoNewline
}
Write-Host ""
$global:yo = "BAH"
ConvertTo-Hex
})
1..2 | % {
$handle2 = $ps2.BeginInvoke()
if ($handle2.AsyncWaitHandle.WaitOne())
{
$ps2.EndInvoke($handle2)
}
start-sleep -s 1.5
write-host "====================" + $yo
}
write-host $yo
同步哈希表將滿足您的需求:
# Sync'd hash table is accessible between threads
$hash = [HashTable]::Synchronized(@{})
$hash.Parameter = "Value"
有幾種方法可以將其傳遞給新線程,我更喜歡簡單的方法:
[PowerShell]$powershell = [PowerShell]::Create()
$powershell.AddScript({
Param
(
$hash
)
# do stuff
}).AddParameter("hash", $hash)
$powershell.BeginInvoke()
您從任一線程對哈希表執行的任何操作都將對兩個線程(以及您傳遞給該線程的任何其他數量)均可見並可見。
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