| // Protocol Buffers - Google's data interchange format | |
| // Copyright 2023 Google LLC. All rights reserved. | |
| // | |
| // Use of this source code is governed by a BSD-style | |
| // license that can be found in the LICENSE file or at | |
| // https://developers.google.com/open-source/licenses/bsd | |
| #ifndef PYUPB_PYTHON_H__ | |
| #define PYUPB_PYTHON_H__ | |
| // We restrict ourselves to the limited API, so that a single build can be | |
| // ABI-compatible with a wide range of Python versions. | |
| // | |
| // The build system will define Py_LIMITED_API as appropriate (see BUILD). We | |
| // only want to define it for our distribution packages, since we can do some | |
| // extra assertions when Py_LIMITED_API is not defined. Also Py_LIMITED_API is | |
| // incompatible with Py_DEBUG. | |
| // #define Py_LIMITED_API <val> // Defined by build system when appropriate. | |
| #include "Python.h" | |
| // The oldest Python version that this build must be able to run on. | |
| // | |
| // Limited API builds can be compiled against headers that are newer than the | |
| // oldest Python version they support (and we do this for our release wheels, | |
| // see python/dist/BUILD.bazel). So version checks for Python features must use | |
| // this macro instead of PY_VERSION_HEX, which is the version of the headers. | |
| #ifdef Py_LIMITED_API | |
| #define PYUPB_MIN_PY_VERSION_HEX Py_LIMITED_API | |
| #else | |
| #define PYUPB_MIN_PY_VERSION_HEX PY_VERSION_HEX | |
| #endif | |
| // Ideally we could restrict ourselves to the limited API of 3.7, but this is | |
| // a very important function that was not officially added to the limited API | |
| // until 3.10. Without this function, there is no way of getting data from a | |
| // Python `str` object without a copy. | |
| // | |
| // While this function was not *officially* added to the limited API until | |
| // Python 3.10, In practice it has been stable since Python 3.1. | |
| // https://bugs.python.org/issue41784 | |
| // | |
| // On Linux/ELF and macOS/Mach-O, we can get away with using this function with | |
| // the limited API prior to 3.10. | |
| #if (defined(__linux__) || defined(__APPLE__)) && defined(Py_LIMITED_API) && \ | |
| Py_LIMITED_API < 0x03100000 | |
| PyAPI_FUNC(const char*) | |
| PyUnicode_AsUTF8AndSize(PyObject* unicode, Py_ssize_t* size); | |
| #endif | |
| #endif // PYUPB_PYTHON_H__ |