kernel32: Reimplement GetMaximumProcessorGroupCount on top of GetLogicalProcessorInformationEx.

Signed-off-by: Alex Henrie <alexhenrie24@gmail.com> Signed-off-by: Alexandre Julliard <julliard@winehq.org>

kernel32: Reimplement GetMaximumProcessorGroupCount on top of GetLogicalProcessorInformationEx.
8ddff3f5 · Alex Henrie · Alexandre Julliard · 04114db9 · 8ddff3f5
Commit 8ddff3f5 authored May 24, 2021 by Alex Henrie Committed by Alexandre Julliard May 25, 2021
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process.c dlls/kernel32/process.c +18 -2

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--- a/dlls/kernel32/process.c
+++ b/dlls/kernel32/process.c
@@ -702,8 +702,24 @@ DWORD WINAPI GetMaximumProcessorCount(WORD group)
 */
 WORD WINAPI GetMaximumProcessorGroupCount(void)
 {
-    FIXME("semi-stub, always returning 1\n");
-    return 1;
+    WORD groups;
+    DWORD size = 0;
+    SYSTEM_LOGICAL_PROCESSOR_INFORMATION_EX *info;
+
+    TRACE("()\n");
+
+    if (!GetLogicalProcessorInformationEx(RelationGroup, NULL, &size)) return 0;
+    if (!(info = HeapAlloc(GetProcessHeap(), 0, size))) return 0;
+    if (!GetLogicalProcessorInformationEx(RelationGroup, info, &size))
+    {
+        HeapFree(GetProcessHeap(), 0, info);
+        return 0;
+    }
+
+    groups = info->Group.MaximumGroupCount;
+
+    HeapFree(GetProcessHeap(), 0, info);
+    return groups;
 }

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