Vehicle Researcher
6928314c89
date: 2025-12-18T23:23:16 master commit: 154c2334110373950bac1c36fc6e943cb1208326
48 lines
2.0 KiB
Python
48 lines
2.0 KiB
Python
import ctypes, subprocess, tempfile, unittest
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from tinygrad.helpers import WIN
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from tinygrad.runtime.support.c import Struct
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class TestAutogen(unittest.TestCase):
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def test_packed_struct_sizeof(self):
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layout = [('a', ctypes.c_char), ('b', ctypes.c_int, 5), ('c', ctypes.c_char)]
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class X(ctypes.Structure): _fields_, _layout_ = layout, 'gcc-sysv'
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class Y(ctypes.Structure): _fields_, _pack_, _layout_ = layout, 1, 'ms'
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class Z(Struct): _packed_, _fields_ = True, layout
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self.assertNotEqual(ctypes.sizeof(X), 4) # ctypes bug! gcc-13.3.0 says this should have size 4
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self.assertEqual(ctypes.sizeof(Y), 6)
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self.assertEqual(ctypes.sizeof(Z), 3)
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layout = [('a', ctypes.c_int, 31), ('b', ctypes.c_int, 31), ('c', ctypes.c_int, 1), ('d', ctypes.c_int, 1)]
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class Foo(ctypes.Structure): _fields_, _layout_ = layout, 'gcc-sysv'
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class Bar(ctypes.Structure): _fields_, _pack_, _layout_ = layout, 1, 'ms'
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class Baz(Struct): _fields_, _packed_ = layout, True
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self.assertEqual(ctypes.sizeof(Foo), 12)
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self.assertEqual(ctypes.sizeof(Bar), 12)
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self.assertEqual(ctypes.sizeof(Baz), 8)
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@unittest.skipIf(WIN, "doesn't compile on windows")
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def test_packed_struct_interop(self):
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class Baz(Struct): pass
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Baz._packed_ = True
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Baz._fields_ = [('a', ctypes.c_int, 30), ('b', ctypes.c_int, 30), ('c', ctypes.c_int, 2), ('d', ctypes.c_int, 2)]
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src = '''
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struct __attribute__((packed)) baz {
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int a:30;
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int b:30;
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int c:2;
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int d:2;
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};
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int test(struct baz x) {
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return x.a + x.b + x.c + x.d;
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}
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'''
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args = ('-x', 'c', '-fPIC', '-shared')
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with tempfile.NamedTemporaryFile(suffix=".so") as f:
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subprocess.check_output(('clang',) + args + ('-', '-o', f.name), input=src.encode('utf-8'))
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b = Baz(0xAA000, 0x00BB0, 0, 1)
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test = ctypes.CDLL(f.name).test
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test.argtypes = [Baz]
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self.assertEqual(test(b), b.a + b.b + b.c + b.d)
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if __name__ == "__main__": unittest.main()
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