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gh-107298: Document PyMODINIT_FUNC macro (#109236)
Document PyMODINIT_FUNC macro. Remove links to PyAPI_FUNC() and PyAPI_DATA() macros since they are not documented. These macros should only be used to define the Python C API. They should not be used outside Python code base.
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@ -105,6 +105,30 @@ defined closer to where they are useful (e.g. :c:macro:`Py_RETURN_NONE`).
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Others of a more general utility are defined here. This is not necessarily a
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complete listing.
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.. c:macro:: PyMODINIT_FUNC
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Declare an extension module ``PyInit`` initialization function. The function
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return type is :c:expr:`PyObject*`. The macro declares any special linkage
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declarations required by the platform, and for C++ declares the function as
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``extern "C"``.
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The initialization function must be named :samp:`PyInit_{name}`, where
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*name* is the name of the module, and should be the only non-\ ``static``
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item defined in the module file. Example::
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static struct PyModuleDef spam_module = {
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PyModuleDef_HEAD_INIT,
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.m_name = "spam",
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...
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};
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PyMODINIT_FUNC
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PyInit_spam(void)
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{
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return PyModule_Create(&spam_module);
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}
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.. c:macro:: Py_ABS(x)
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Return the absolute value of ``x``.
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@ -855,8 +855,8 @@ Example on Linux x86-64::
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At the beginning of the files, C extensions are built as built-in modules.
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Extensions defined after the ``*shared*`` marker are built as dynamic libraries.
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The :c:macro:`PyAPI_FUNC()`, :c:macro:`PyAPI_DATA()` and
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:c:macro:`PyMODINIT_FUNC` macros of :file:`Include/pyport.h` are defined
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The :c:macro:`!PyAPI_FUNC()`, :c:macro:`!PyAPI_DATA()` and
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:c:macro:`PyMODINIT_FUNC` macros of :file:`Include/exports.h` are defined
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differently depending if the ``Py_BUILD_CORE_MODULE`` macro is defined:
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* Use ``Py_EXPORTED_SYMBOL`` if the ``Py_BUILD_CORE_MODULE`` is defined
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@ -1889,7 +1889,7 @@ Changes to Python's build process and to the C API include:
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* The :c:macro:`!DL_EXPORT` and :c:macro:`!DL_IMPORT` macros are now deprecated.
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Initialization functions for Python extension modules should now be declared
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using the new macro :c:macro:`PyMODINIT_FUNC`, while the Python core will
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generally use the :c:macro:`PyAPI_FUNC` and :c:macro:`PyAPI_DATA` macros.
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generally use the :c:macro:`!PyAPI_FUNC` and :c:macro:`!PyAPI_DATA` macros.
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* The interpreter can be compiled without any docstrings for the built-in
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functions and modules by supplying :option:`!--without-doc-strings` to the
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