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

diegorusso · web-flow · commit a06b60646274 · 2024-01-30T23:53:04.000Z
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
@@ -707,7 +707,7 @@ 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

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1 @@`
	`1`	+Fix ctypes structs with array on Windows ARM64 platform by setting ``MAX_STRUCT_SIZE`` to 32 in stgdict. Patch by Diego Russo