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Ensure PYBIND11_TLS_REPLACE_VALUE evaluates its arguments only once (#3290)

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Jeremy Maitin-Shepard 2021-09-23 10:36:25 -07:00 committed by GitHub
parent 5f46e47da8
commit 2a78abffd8
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1 changed files with 5 additions and 4 deletions
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include/pybind11/detail/internals.h
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@ -84,12 +84,13 @@ inline PyObject *make_object_base_type(PyTypeObject *metaclass);
// On CPython < 3.4 and on PyPy, `PyThread_set_key_value` strangely does not set
// the value if it has already been set. Instead, it must first be deleted and
// then set again.
inline void tls_replace_value(PYBIND11_TLS_KEY_REF key, void *value) {
PyThread_delete_key_value(key);
PyThread_set_key_value(key, value);
}
# define PYBIND11_TLS_DELETE_VALUE(key) PyThread_delete_key_value(key)
# define PYBIND11_TLS_REPLACE_VALUE(key, value) \
do { \
PyThread_delete_key_value((key)); \
PyThread_set_key_value((key), (value)); \
} while (false)
::pybind11::detail::tls_replace_value((key), (value))
# else
# define PYBIND11_TLS_DELETE_VALUE(key) PyThread_set_key_value((key), nullptr)
# define PYBIND11_TLS_REPLACE_VALUE(key, value) PyThread_set_key_value((key), (value))