gh-110190: Fix ctypes structs with array on Windows ARM64 (GH-114753)

(cherry picked from commit a06b606) Co-authored-by: Diego Russo <[email protected]>
python · Jan 31, 2024 · d326d52 · d326d52
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diff --git a/Misc/NEWS.d/next/Library/2024-01-30-15-34-08.gh-issue-110190.Z5PQQX.rst b/Misc/NEWS.d/next/Library/2024-01-30-15-34-08.gh-issue-110190.Z5PQQX.rst
@@ -0,0 +1 @@
+Fix ctypes structs with array on Windows ARM64 platform by setting ``MAX_STRUCT_SIZE`` to 32 in stgdict. Patch by Diego Russo
diff --git a/Modules/_ctypes/stgdict.c b/Modules/_ctypes/stgdict.c
@@ -665,7 +665,7 @@ PyCStructUnionType_update_stgdict(PyObject *type, PyObject *fields, int isStruct
 /*
  * The value of MAX_STRUCT_SIZE depends on the platform Python is running on.
  */
-#if defined(__aarch64__) || defined(__arm__)
+#if defined(__aarch64__) || defined(__arm__) || defined(_M_ARM64)
 #  define MAX_STRUCT_SIZE 32
 #elif defined(__powerpc64__)
 #  define MAX_STRUCT_SIZE 64
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		@@ -0,0 +1 @@
		Fix ctypes structs with array on Windows ARM64 platform by setting ``MAX_STRUCT_SIZE`` to 32 in stgdict. Patch by Diego Russo