From e0e02b18b36f16de60bfc3d60b49b10e28f62aac Mon Sep 17 00:00:00 2001
From: thexai <58434170+thexai@users.noreply.github.com>
Date: Sun, 28 Jun 2026 12:20:19 +0200
Subject: [PATCH] gh-152433: Windows: implement os.cpu_count() for UWP

---
 .../Windows/2026-06-28-12-37-08.gh-issue-152433.FTMgqF.rst    | 1 +
 Modules/posixmodule.c                                         | 4 +++-
 2 files changed, 4 insertions(+), 1 deletion(-)
 create mode 100644 Misc/NEWS.d/next/Windows/2026-06-28-12-37-08.gh-issue-152433.FTMgqF.rst

diff --git a/Misc/NEWS.d/next/Windows/2026-06-28-12-37-08.gh-issue-152433.FTMgqF.rst b/Misc/NEWS.d/next/Windows/2026-06-28-12-37-08.gh-issue-152433.FTMgqF.rst
new file mode 100644
index 000000000000000..8a9f2bd38aec796
--- /dev/null
+++ b/Misc/NEWS.d/next/Windows/2026-06-28-12-37-08.gh-issue-152433.FTMgqF.rst
@@ -0,0 +1 @@
+Implement os.cpu_count() for UWP.
diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
index e455f532a5bbf41..5ccc359add90816 100644
--- a/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@ -16008,7 +16008,9 @@ os_cpu_count_impl(PyObject *module)
 # ifdef MS_WINDOWS_DESKTOP
     ncpu = GetActiveProcessorCount(ALL_PROCESSOR_GROUPS);
 # else
-    ncpu = 0;
+    SYSTEM_INFO sysinfo;
+    GetSystemInfo(&sysinfo);
+    ncpu = sysinfo.dwNumberOfProcessors;
 # endif
 
 #elif defined(__hpux)