mirror of
https://github.com/python/cpython.git
synced 2024-11-24 17:47:13 +01:00
12af8ec864
Fix warnings when using -Wimplicit-fallthrough compiler flag. Annotate explicitly "fall through" switch cases with a new _Py_FALLTHROUGH macro which uses __attribute__((fallthrough)) if available. Replace "fall through" comments with _Py_FALLTHROUGH. Add _Py__has_attribute() macro. No longer define __has_attribute() macro if it's not defined. Move also _Py__has_builtin() at the top of pyport.h. Co-Authored-By: Nikita Sobolev <mail@sobolevn.me>
106 lines
4.4 KiB
C
106 lines
4.4 KiB
C
#ifndef Py_EXPORTS_H
|
|
#define Py_EXPORTS_H
|
|
|
|
/* Declarations for symbol visibility.
|
|
|
|
PyAPI_FUNC(type): Declares a public Python API function and return type
|
|
PyAPI_DATA(type): Declares public Python data and its type
|
|
PyMODINIT_FUNC: A Python module init function. If these functions are
|
|
inside the Python core, they are private to the core.
|
|
If in an extension module, it may be declared with
|
|
external linkage depending on the platform.
|
|
|
|
As a number of platforms support/require "__declspec(dllimport/dllexport)",
|
|
we support a HAVE_DECLSPEC_DLL macro to save duplication.
|
|
*/
|
|
|
|
/*
|
|
All windows ports, except cygwin, are handled in PC/pyconfig.h.
|
|
|
|
Cygwin is the only other autoconf platform requiring special
|
|
linkage handling and it uses __declspec().
|
|
*/
|
|
#if defined(__CYGWIN__)
|
|
# define HAVE_DECLSPEC_DLL
|
|
#endif
|
|
|
|
#if defined(_WIN32) || defined(__CYGWIN__)
|
|
#if defined(Py_ENABLE_SHARED)
|
|
#define Py_IMPORTED_SYMBOL __declspec(dllimport)
|
|
#define Py_EXPORTED_SYMBOL __declspec(dllexport)
|
|
#define Py_LOCAL_SYMBOL
|
|
#else
|
|
#define Py_IMPORTED_SYMBOL
|
|
#define Py_EXPORTED_SYMBOL
|
|
#define Py_LOCAL_SYMBOL
|
|
#endif
|
|
#else
|
|
/*
|
|
* If we only ever used gcc >= 5, we could use __has_attribute(visibility)
|
|
* as a cross-platform way to determine if visibility is supported. However,
|
|
* we may still need to support gcc >= 4, as some Ubuntu LTS and Centos versions
|
|
* have 4 < gcc < 5.
|
|
*/
|
|
#if (defined(__GNUC__) && (__GNUC__ >= 4)) ||\
|
|
(defined(__clang__) && _Py__has_attribute(visibility))
|
|
#define Py_IMPORTED_SYMBOL __attribute__ ((visibility ("default")))
|
|
#define Py_EXPORTED_SYMBOL __attribute__ ((visibility ("default")))
|
|
#define Py_LOCAL_SYMBOL __attribute__ ((visibility ("hidden")))
|
|
#else
|
|
#define Py_IMPORTED_SYMBOL
|
|
#define Py_EXPORTED_SYMBOL
|
|
#define Py_LOCAL_SYMBOL
|
|
#endif
|
|
#endif
|
|
|
|
/* only get special linkage if built as shared or platform is Cygwin */
|
|
#if defined(Py_ENABLE_SHARED) || defined(__CYGWIN__)
|
|
# if defined(HAVE_DECLSPEC_DLL)
|
|
# if defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_MODULE)
|
|
# define PyAPI_FUNC(RTYPE) Py_EXPORTED_SYMBOL RTYPE
|
|
# define PyAPI_DATA(RTYPE) extern Py_EXPORTED_SYMBOL RTYPE
|
|
/* module init functions inside the core need no external linkage */
|
|
/* except for Cygwin to handle embedding */
|
|
# if defined(__CYGWIN__)
|
|
# define PyMODINIT_FUNC Py_EXPORTED_SYMBOL PyObject*
|
|
# else /* __CYGWIN__ */
|
|
# define PyMODINIT_FUNC PyObject*
|
|
# endif /* __CYGWIN__ */
|
|
# else /* Py_BUILD_CORE */
|
|
/* Building an extension module, or an embedded situation */
|
|
/* public Python functions and data are imported */
|
|
/* Under Cygwin, auto-import functions to prevent compilation */
|
|
/* failures similar to those described at the bottom of 4.1: */
|
|
/* http://docs.python.org/extending/windows.html#a-cookbook-approach */
|
|
# if !defined(__CYGWIN__)
|
|
# define PyAPI_FUNC(RTYPE) Py_IMPORTED_SYMBOL RTYPE
|
|
# endif /* !__CYGWIN__ */
|
|
# define PyAPI_DATA(RTYPE) extern Py_IMPORTED_SYMBOL RTYPE
|
|
/* module init functions outside the core must be exported */
|
|
# if defined(__cplusplus)
|
|
# define PyMODINIT_FUNC extern "C" Py_EXPORTED_SYMBOL PyObject*
|
|
# else /* __cplusplus */
|
|
# define PyMODINIT_FUNC Py_EXPORTED_SYMBOL PyObject*
|
|
# endif /* __cplusplus */
|
|
# endif /* Py_BUILD_CORE */
|
|
# endif /* HAVE_DECLSPEC_DLL */
|
|
#endif /* Py_ENABLE_SHARED */
|
|
|
|
/* If no external linkage macros defined by now, create defaults */
|
|
#ifndef PyAPI_FUNC
|
|
# define PyAPI_FUNC(RTYPE) Py_EXPORTED_SYMBOL RTYPE
|
|
#endif
|
|
#ifndef PyAPI_DATA
|
|
# define PyAPI_DATA(RTYPE) extern Py_EXPORTED_SYMBOL RTYPE
|
|
#endif
|
|
#ifndef PyMODINIT_FUNC
|
|
# if defined(__cplusplus)
|
|
# define PyMODINIT_FUNC extern "C" Py_EXPORTED_SYMBOL PyObject*
|
|
# else /* __cplusplus */
|
|
# define PyMODINIT_FUNC Py_EXPORTED_SYMBOL PyObject*
|
|
# endif /* __cplusplus */
|
|
#endif
|
|
|
|
|
|
#endif /* Py_EXPORTS_H */
|