From 4eda9429b08ee682e884195da41fb673c393faa9 Mon Sep 17 00:00:00 2001
From: thexai <58434170+thexai@users.noreply.github.com>
Date: Sun, 28 Jun 2026 10:29:58 +0200
Subject: [PATCH] gh-152433: Windows: enable mmapmodule for UWP

---
 .../Windows/2026-06-29-16-29-50.gh-issue-152433._nhCjt.rst    | 2 ++
 Modules/mmapmodule.c                                          | 4 ++--
 PC/config.c                                                   | 2 +-
 3 files changed, 5 insertions(+), 3 deletions(-)
 create mode 100644 Misc/NEWS.d/next/Windows/2026-06-29-16-29-50.gh-issue-152433._nhCjt.rst

diff --git a/Misc/NEWS.d/next/Windows/2026-06-29-16-29-50.gh-issue-152433._nhCjt.rst b/Misc/NEWS.d/next/Windows/2026-06-29-16-29-50.gh-issue-152433._nhCjt.rst
new file mode 100644
index 00000000000000..0c420c124c2981
--- /dev/null
+++ b/Misc/NEWS.d/next/Windows/2026-06-29-16-29-50.gh-issue-152433._nhCjt.rst
@@ -0,0 +1,2 @@
+Restores the ``mmap`` module when CPython is built from source for specific
+Windows API sets.
diff --git a/Modules/mmapmodule.c b/Modules/mmapmodule.c
index 6fb04ba7bd47c6..cbf40365e4f41b 100644
--- a/Modules/mmapmodule.c
+++ b/Modules/mmapmodule.c
@@ -338,7 +338,7 @@ _PyErr_SetFromNTSTATUS(ULONG status)
 }
 #endif
 
-#if defined(MS_WINDOWS) && !defined(DONT_USE_SEH)
+#if defined(MS_WINDOWS_DESKTOP) && !defined(DONT_USE_SEH)
 #define HANDLE_INVALID_MEM(sourcecode)                                     \
 do {                                                                       \
     EXCEPTION_RECORD record;                                               \
@@ -364,7 +364,7 @@ do {                                                                       \
 } while (0)
 #endif
 
-#if defined(MS_WINDOWS) && !defined(DONT_USE_SEH)
+#if defined(MS_WINDOWS_DESKTOP) && !defined(DONT_USE_SEH)
 #define HANDLE_INVALID_MEM_METHOD(self, sourcecode)                           \
 do {                                                                          \
     EXCEPTION_RECORD record;                                                  \
diff --git a/PC/config.c b/PC/config.c
index 51b46c64d99b81..dcccc6a3a6d016 100644
--- a/PC/config.c
+++ b/PC/config.c
@@ -140,7 +140,7 @@ struct _inittab _PyImport_Inittab[] = {
     {"itertools", PyInit_itertools},
     {"_collections", PyInit__collections},
     {"_symtable", PyInit__symtable},
-#if defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_GAMES)
+#if defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_GAMES) || defined(MS_WINDOWS_APP)
     {"mmap", PyInit_mmap},
 #endif
     {"_csv", PyInit__csv},