gh-152433: Windows: implement os.cpu_count() for UWP

thexai · thexai · commit e0e02b18b36f · 2026-06-29T16:11:12.000+02:00
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
@@ -0,0 +1 @@
+Implement os.cpu_count() for UWP.
diff --git 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)
