34 lines
938 B
Python
34 lines
938 B
Python
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import numpy as np
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from numba import cuda, types
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from numba.cuda.testing import (skip_on_cudasim, test_data_dir, unittest,
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CUDATestCase)
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from numba.tests.support import skip_unless_cffi
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@skip_unless_cffi
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@skip_on_cudasim('Simulator does not support linking')
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class TestCFFI(CUDATestCase):
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def test_from_buffer(self):
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import cffi
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ffi = cffi.FFI()
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link = str(test_data_dir / 'jitlink.ptx')
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sig = types.void(types.CPointer(types.int32))
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array_mutator = cuda.declare_device('array_mutator', sig)
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@cuda.jit(link=[link])
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def mutate_array(x):
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x_ptr = ffi.from_buffer(x)
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array_mutator(x_ptr)
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x = np.arange(2).astype(np.int32)
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mutate_array[1, 1](x)
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# The foreign function should have copied element 1 to element 0
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self.assertEqual(x[0], x[1])
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if __name__ == '__main__':
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unittest.main()
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