more tweaks

Author: VSadov

src/libraries/Common/src/Interop/Windows/Kernel32/Interop.Threading.cs

@@ -42,6 +42,10 @@ internal static unsafe partial SafeWaitHandle CreateThread(
         [LibraryImport(Libraries.Kernel32)]
         internal static partial IntPtr GetCurrentThread();
 
+        [LibraryImport(Libraries.Kernel32, SetLastError = true)]
+        [return: MarshalAs(UnmanagedType.Bool)]
+        internal static partial bool SetThreadPriorityBoost(IntPtr hThread, [MarshalAs(UnmanagedType.Bool)] bool bDisablePriorityBoost);
+
         internal const int DUPLICATE_SAME_ACCESS = 2;
 
         [LibraryImport(Libraries.Kernel32, SetLastError = true)]

src/libraries/System.Private.CoreLib/src/System/Threading/LowLevelFutex.Windows.cs

@@ -28,7 +28,7 @@ internal static bool WaitOnAddressTimeout(int* address, int comparand, int milli
                 return true;
             }
 
-            int lastError = Marshal.GetLastWin32Error();
+            int lastError = Marshal.GetLastPInvokeError();
             Debug.Assert(lastError == Interop.Errors.ERROR_TIMEOUT);
             if (lastError == Interop.Errors.ERROR_TIMEOUT)
             {