Sets affinity to a single processor - needed for Windows Vista else rendering is jerky.

git-svn-id: https://svn.code.sf.net/p/speed-dreams/code/trunk@112 30fe4595-0a0c-4342-8851-515496e4dcbd

Former-commit-id: 96dd6e14b17d464feb18c49b7d160475f671ce05
Former-commit-id: b49033ca2875742c4e04ece9b9bd77aabf7eff3a

src/windows/windowsspec.cpp

@@ -641,6 +641,24 @@ windowsTimeClock(void)
     return( D );
 }
 
+static void
+windowsSetAffinity(void)
+{
+    /* Restrict wtorcs.exe to one CPU core/processor - avoids jerky rendering 
+     * especially under Vista.                                                 */
+
+    HANDLE hProcess = GetCurrentProcess();
+    ULONG_PTR ProcAM, SysAM;
+
+    GetProcessAffinityMask( hProcess, (PDWORD_PTR) &ProcAM, (PDWORD_PTR) &SysAM );
+    if (ProcAM > 1)
+    {
+	ProcAM = 1;
+	SetProcessAffinityMask( hProcess, ProcAM );
+    }
+    return;
+}
+
 
 /*
 * Function
@@ -673,6 +691,8 @@ WindowsSpecInit(void)
     GfOs.dirGetListFiltered = windowsDirGetListFiltered;
     GfOs.timeClock = windowsTimeClock;
 
+    windowsSetAffinity();
+
 
 }