Powershell: Runspace/Pool how do i pass a function and shared variable? - powershell

Question

I am trying to create a thread that will use a shared variable (between main session and the thread)
plus the give the thread ability to use outside function from the main code
I have managed to pass the function for the thread to use
and i have managed to pass read only variable.
my problem is that if i am changing the value of the variable inside the thread and then i try to read it from the main session - i can not see the change in the value, therefore its not shared.
How do i do that?
My goal is to have one thread in the end.
this is my code:
$x = [Hashtable]::Synchronized(#{})
$global:yo = "START"
Function ConvertTo-Hex {
#Write-Output "Function Ran"
write-host "hi"
$x.host.ui.WriteVerboseLine("===========")
write-host $yo
$yo="TEST"
write-host $yo
}
#endregion
$rs = [RunspaceFactory]::CreateRunspace()
$rs.ApartmentState,$rs.ThreadOptions = "STA","ReUseThread"
$rs.Open()
$rs.SessionStateProxy.SetVariable("x",$x)
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, $true)))
$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
}
})
$ps1.AddParameter(#($yo))
# 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 ""
$yo = "BAH"
ConvertTo-Hex
})
$ps2.AddParameter(#($yo))
1..10 | % {
$handle2 = $ps2.BeginInvoke()
if ($handle2.AsyncWaitHandle.WaitOne())
{
$ps2.EndInvoke($handle2)
}
start-sleep -s 1.5
write-host "====================" + $yo
}