[RTL][NTDLL] Implement processor related NT6+ functions

Implements RtlGetCurrentProcessorNumberEx, RtlIsProcessorFeaturePresent

sdk/lib/rtl/CMakeLists.txt

@@ -70,6 +70,7 @@ list(APPEND SOURCE
     prefix.c
     priv.c
     process.c
+    processor.c
     propvar.c
     random.c
     rangelist.c
@@ -138,6 +139,7 @@ list(APPEND SOURCE_VISTA
     ${RTL_WINE_SOURCE_VISTA}
     condvar.c
     locale.c
+    processor.c
     runonce.c
     slist.c
     srw.c

sdk/lib/rtl/process.c

@@ -486,14 +486,6 @@ RtlSetProcessIsCritical(IN BOOLEAN NewValue,
                                    sizeof(ULONG));
 }
 
-ULONG
-NTAPI
-RtlGetCurrentProcessorNumber(VOID)
-{
-    /* Forward to kernel */
-    return NtGetCurrentProcessorNumber();
-}
-
 _IRQL_requires_max_(APC_LEVEL)
 ULONG
 NTAPI

sdk/lib/rtl/processor.c

@@ -0,0 +1,45 @@
+/*
+ * PROJECT:     ReactOS runtime library (RTL)
+ * LICENSE:     MIT (https://spdx.org/licenses/MIT)
+ * PURPOSE:     Implementation of processor related routines
+ * COPYRIGHT:   Copyright 2026 Timo Kreuzer <[email protected]>
+ */
+
+/* INCLUDES *****************************************************************/
+
+#include <rtl.h>
+
+#define NDEBUG
+#include <debug.h>
+
+/* FUNCTIONS *****************************************************************/
+
+
+BOOLEAN
+NTAPI
+RtlIsProcessorFeaturePresent(
+    _In_ ULONG ProcessorFeature)
+{
+    if (ProcessorFeature >= RTL_NUMBER_OF(SharedUserData->ProcessorFeatures))
+    {
+        return FALSE;
+    }
+
+    return SharedUserData->ProcessorFeatures[ProcessorFeature] != 0;
+}
+
+ULONG
+NTAPI
+RtlGetCurrentProcessorNumber(
+    VOID)
+{
+    return NtGetCurrentProcessorNumber();
+}
+
+VOID
+NTAPI
+RtlGetCurrentProcessorNumberEx(
+    _Out_ PPROCESSOR_NUMBER ProcessorNumber)
+{
+    NtGetCurrentProcessorNumberEx(ProcessorNumber);
+}