matrix testing mutex

Author: mbaluda

scripts/matrix_testing/CreateMatrixTestReport.ps1

@@ -299,6 +299,11 @@ $jobRows = $queriesToCheck | ForEach-Object -ThrottleLimit $NumThreads -Parallel
 
     foreach($testDirectory in $testDirs){
 
+        Write-Host "Acquiring lock for $testDirectory"
+        $Mutex = New-Object -TypeName System.Threading.Mutex -ArgumentList $false, ("__Matrix_" + $testDirectory.Replace([IO.Path]::DirectorySeparatorChar,"_"));
+        $Mutex.WaitOne() | Out-Null;
+        Write-Host "Locked $testDirectory"        
+
         # for the report 
         $row = @{
             "SUITE"             = $CurrentSuiteName;
@@ -412,6 +417,8 @@ $jobRows = $queriesToCheck | ForEach-Object -ThrottleLimit $NumThreads -Parallel
             # output current row state 
             $row 
 
+            # release any held mutexes            
+            $Mutex.ReleaseMutex();
 
             ###########################################################
             ###########################################################
@@ -449,4 +456,4 @@ if (-not $SkipSummaryReport){
     # write out a summary 
     Write-Host "Writing summary report to $summaryReportOutputFile"
     Create-Summary-Report -DataFile $reportOutputFile -OutputFile $summaryReportOutputFile
-}
+}