s2h = dll.ret_2h_func(self.wrap(inp))
self.assertEqual((s2h.x, s2h.y), (99*2, 88*3))
+ # Test also that the original struct was unmodified (i.e. was passed by
+ # value)
+ self.assertEqual((inp.x, inp.y), (99, 88))
+
def test_struct_return_8H(self):
class S8I(Structure):
_fields_ = [("a", c_int),
self.assertEqual(s.second, 0xcafebabe)
self.assertEqual(s.third, 0x0bad1dea)
+ def test_pass_by_value_in_register(self):
+ class X(Structure):
+ _fields_ = [
+ ('first', c_uint),
+ ('second', c_uint)
+ ]
+
+ s = X()
+ s.first = 0xdeadbeef
+ s.second = 0xcafebabe
+ dll = CDLL(_ctypes_test.__file__)
+ func = dll._testfunc_reg_struct_update_value
+ func.argtypes = (X,)
+ func.restype = None
+ func(s)
+ self.assertEqual(s.first, 0xdeadbeef)
+ self.assertEqual(s.second, 0xcafebabe)
+ got = X.in_dll(dll, "last_tfrsuv_arg")
+ self.assertEqual(s.first, got.first)
+ self.assertEqual(s.second, got.second)
+
+
class PointerMemberTestCase(unittest.TestCase):
def test(self):
((volatile Test *)&in)->third = 0x0badf00d;
}
+typedef struct {
+ unsigned int first;
+ unsigned int second;
+} TestReg;
+
+
+EXPORT(TestReg) last_tfrsuv_arg;
+
+
+EXPORT(void)
+_testfunc_reg_struct_update_value(TestReg in)
+{
+ last_tfrsuv_arg = in;
+ ((volatile TestReg *)&in)->first = 0x0badf00d;
+ ((volatile TestReg *)&in)->second = 0x0badf00d;
+}
+
+
EXPORT(void)testfunc_array(int values[4])
{
printf("testfunc_array %d %d %d %d\n",
}
#endif
+#if (defined(__x86_64__) && (defined(__MINGW64__) || defined(__CYGWIN__))) || \
+ defined(__aarch64__)
+#define CTYPES_PASS_BY_REF_HACK
+#define POW2(x) (((x & ~(x - 1)) == x) ? x : 0)
+#define IS_PASS_BY_REF(x) (x > 8 || !POW2(x))
+#endif
+
/*
* Requirements, must be ensured by the caller:
* - argtuple is tuple of arguments
}
for (i = 0; i < argcount; ++i) {
atypes[i] = args[i].ffi_type;
- if (atypes[i]->type == FFI_TYPE_STRUCT
- )
+#ifdef CTYPES_PASS_BY_REF_HACK
+ size_t size = atypes[i]->size;
+ if (IS_PASS_BY_REF(size)) {
+ void *tmp = alloca(size);
+ if (atypes[i]->type == FFI_TYPE_STRUCT)
+ memcpy(tmp, args[i].value.p, size);
+ else
+ memcpy(tmp, (void*)&args[i].value, size);
+
+ avalues[i] = tmp;
+ }
+ else
+#endif
+ if (atypes[i]->type == FFI_TYPE_STRUCT)
avalues[i] = (void *)args[i].value.p;
else
avalues[i] = (void *)&args[i].value;