[PATCH v2 5/5] kernel32: Reimplement GetMaximumProcessorGroupCount on top of GetLogicalProcessorInformationEx

[Alex Henrie]

Signed-off-by: Alex Henrie <alexhenrie24 at gmail.com>
---
v2: Fix memory leak on error path
---
 dlls/kernel32/process.c | 20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

diff --git a/dlls/kernel32/process.c b/dlls/kernel32/process.c
index 6de094950e3..aa0922f5164 100644
--- 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;
 }
 
 /***********************************************************************
-- 
2.31.1