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Add warning in ctypes documentation for #16575 and #16576

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Eli Bendersky 2013-03-09 05:54:00 -08:00
parent 9cbcc2f1c0
commit 490cf4472e
1 changed files with 7 additions and 0 deletions
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Doc/library/ctypes.rst
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@ -603,6 +603,13 @@ for debugging because they can provide useful information::
.. _ctypes-structureunion-alignment-byte-order: .. _ctypes-structureunion-alignment-byte-order:
.. warning::
:mod:`ctypes` does not support passing unions or structures with bit-fields
to functions by value. While this may work on 32-bit x86, it's not
guaranteed by the library to work in the general case. Unions and
structures with bit-fields should always be passed to functions by pointer.
Structure/union alignment and byte order Structure/union alignment and byte order
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^