[Python-checkins] Fix GetNamedPipeHandleStateW on non-desktop Windows API partitions (GH-134049)

[zooba]

https://github.com/python/cpython/commit/20095fb29ac3fd386eae2189ed725571192ae0af
commit: 20095fb29ac3fd386eae2189ed725571192ae0af
branch: main
author: Max Bachmann <kont...@maxbachmann.de>
committer: zooba <steve.do...@microsoft.com>
date: 2025-05-15T21:12:10+01:00
summary:

Fix GetNamedPipeHandleStateW on non-desktop Windows API partitions (GH-134049)

files:
M Python/fileutils.c

diff --git a/Python/fileutils.c b/Python/fileutils.c
index 78603d40704f14..2a3f12d4e872f8 100644
--- a/Python/fileutils.c
+++ b/Python/fileutils.c
@@ -2784,6 +2784,43 @@ _Py_set_blocking(int fd, int blocking)
     return -1;
 }
 #else   /* MS_WINDOWS */
+
+// The Windows Games API family doesn't expose GetNamedPipeHandleStateW so 
attempt
+// to load it directly from the Kernel32.dll
+#if !defined(MS_WINDOWS_APP) && !defined(MS_WINDOWS_SYSTEM)
+BOOL
+GetNamedPipeHandleStateW(HANDLE hNamedPipe, LPDWORD lpState, LPDWORD 
lpCurInstances, LPDWORD lpMaxCollectionCount,
+                         LPDWORD lpCollectDataTimeout, LPWSTR lpUserName, 
DWORD nMaxUserNameSize)
+{
+    static int initialized = 0;
+    typedef BOOL(__stdcall* PGetNamedPipeHandleStateW) (
+        HANDLE hNamedPipe, LPDWORD lpState, LPDWORD lpCurInstances, LPDWORD 
lpMaxCollectionCount,
+        LPDWORD lpCollectDataTimeout, LPWSTR lpUserName, DWORD 
nMaxUserNameSize);
+    static PGetNamedPipeHandleStateW _GetNamedPipeHandleStateW;
+
+    if (initialized == 0) {
+        HMODULE api = LoadLibraryExW(L"Kernel32.dll", NULL, 
LOAD_LIBRARY_SEARCH_SYSTEM32);
+        if (api) {
+            _GetNamedPipeHandleStateW = 
(PGetNamedPipeHandleStateW)GetProcAddress(
+                api, "GetNamedPipeHandleStateW");
+        }
+        else {
+            _GetNamedPipeHandleStateW = NULL;
+        }
+        initialized = 1;
+    }
+
+    if (!_GetNamedPipeHandleStateW) {
+        SetLastError(E_NOINTERFACE);
+        return FALSE;
+    }
+
+    return _GetNamedPipeHandleStateW(
+        hNamedPipe, lpState, lpCurInstances, lpMaxCollectionCount, 
lpCollectDataTimeout, lpUserName, nMaxUserNameSize
+    );
+}
+#endif /* !MS_WINDOWS_APP && !MS_WINDOWS_SYSTEM */
+
 int
 _Py_get_blocking(int fd)
 {

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