166 lines
4.7 KiB
C++
166 lines
4.7 KiB
C++
/* -*- indent-tabs-mode: nil; tab-width: 4; -*- */
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#ifndef GREENLET_CPYTHON_COMPAT_H
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#define GREENLET_CPYTHON_COMPAT_H
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/**
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* Helpers for compatibility with multiple versions of CPython.
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*/
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#define PY_SSIZE_T_CLEAN
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#include "Python.h"
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// These enable writing template functions or classes specialized
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// based on the Python version. Write both versions of the function,
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// one with the WHEN version, one with the WHEN_NOT version.
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// Instantiate the template using the G_IS_PY37 macro.
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struct GREENLET_WHEN_PY37
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{
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typedef GREENLET_WHEN_PY37* Yes;
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// We really just want an alias, `using Yes = IsIt`,
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// but old MSVC for Py27 doesn't support that.
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typedef GREENLET_WHEN_PY37* IsIt;
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};
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struct GREENLET_WHEN_NOT_PY37
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{
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typedef GREENLET_WHEN_NOT_PY37* No;
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typedef GREENLET_WHEN_NOT_PY37* IsIt;
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};
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#if PY_VERSION_HEX >= 0x030700A3
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# define GREENLET_PY37 1
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typedef GREENLET_WHEN_PY37 G_IS_PY37;
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#else
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# define GREENLET_PY37 0
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typedef GREENLET_WHEN_NOT_PY37 G_IS_PY37;
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#endif
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#if PY_VERSION_HEX >= 0x30A00B1
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/*
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Python 3.10 beta 1 changed tstate->use_tracing to a nested cframe member.
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See https://github.com/python/cpython/pull/25276
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We have to save and restore this as well.
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*/
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# define GREENLET_USE_CFRAME 1
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#else
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# define GREENLET_USE_CFRAME 0
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#endif
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#if PY_VERSION_HEX >= 0x30B00A4
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/*
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Greenlet won't compile on anything older than Python 3.11 alpha 4 (see
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https://bugs.python.org/issue46090). Summary of breaking internal changes:
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- Python 3.11 alpha 1 changed how frame objects are represented internally.
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- https://github.com/python/cpython/pull/30122
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- Python 3.11 alpha 3 changed how recursion limits are stored.
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- https://github.com/python/cpython/pull/29524
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- Python 3.11 alpha 4 changed how exception state is stored. It also includes a
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change to help greenlet save and restore the interpreter frame "data stack".
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- https://github.com/python/cpython/pull/30122
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- https://github.com/python/cpython/pull/30234
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*/
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# define GREENLET_PY311 1
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#else
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# define GREENLET_PY311 0
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#endif
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#ifndef Py_SET_REFCNT
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/* Py_REFCNT and Py_SIZE macros are converted to functions
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https://bugs.python.org/issue39573 */
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# define Py_SET_REFCNT(obj, refcnt) Py_REFCNT(obj) = (refcnt)
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#endif
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#ifndef _Py_DEC_REFTOTAL
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/* _Py_DEC_REFTOTAL macro has been removed from Python 3.9 by:
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https://github.com/python/cpython/commit/49932fec62c616ec88da52642339d83ae719e924
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*/
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# ifdef Py_REF_DEBUG
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# define _Py_DEC_REFTOTAL _Py_RefTotal--
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# else
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# define _Py_DEC_REFTOTAL
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# endif
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#endif
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// Define these flags like Cython does if we're on an old version.
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#ifndef Py_TPFLAGS_CHECKTYPES
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#define Py_TPFLAGS_CHECKTYPES 0
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#endif
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#ifndef Py_TPFLAGS_HAVE_INDEX
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#define Py_TPFLAGS_HAVE_INDEX 0
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#endif
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#ifndef Py_TPFLAGS_HAVE_NEWBUFFER
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#define Py_TPFLAGS_HAVE_NEWBUFFER 0
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#endif
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#ifndef Py_TPFLAGS_HAVE_FINALIZE
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#define Py_TPFLAGS_HAVE_FINALIZE 0
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#endif
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#ifndef Py_TPFLAGS_HAVE_VERSION_TAG
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#define Py_TPFLAGS_HAVE_VERSION_TAG 0
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#endif
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#define G_TPFLAGS_DEFAULT Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_VERSION_TAG | Py_TPFLAGS_CHECKTYPES | Py_TPFLAGS_HAVE_NEWBUFFER | Py_TPFLAGS_HAVE_GC
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#if PY_MAJOR_VERSION >= 3
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# define GNative_FromFormat PyUnicode_FromFormat
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#else
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# define GNative_FromFormat PyString_FromFormat
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#endif
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#if PY_MAJOR_VERSION >= 3
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# define Greenlet_Intern PyUnicode_InternFromString
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#else
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# define Greenlet_Intern PyString_InternFromString
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#endif
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#if PY_VERSION_HEX < 0x03090000
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// The official version only became available in 3.9
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# define PyObject_GC_IsTracked(o) _PyObject_GC_IS_TRACKED(o)
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#endif
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#if PY_MAJOR_VERSION < 3
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struct PyModuleDef {
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int unused;
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const char* const m_name;
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const char* m_doc;
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Py_ssize_t m_size;
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PyMethodDef* m_methods;
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// Then several more fields we're not currently using.
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};
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#define PyModuleDef_HEAD_INIT 1
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PyObject* PyModule_Create(PyModuleDef* m)
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{
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return Py_InitModule(m->m_name, m->m_methods);
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}
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#endif
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// bpo-43760 added PyThreadState_EnterTracing() to Python 3.11.0a2
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#if PY_VERSION_HEX < 0x030B00A2 && !defined(PYPY_VERSION)
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static inline void PyThreadState_EnterTracing(PyThreadState *tstate)
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{
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tstate->tracing++;
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#if PY_VERSION_HEX >= 0x030A00A1
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tstate->cframe->use_tracing = 0;
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#else
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tstate->use_tracing = 0;
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#endif
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}
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#endif
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// bpo-43760 added PyThreadState_LeaveTracing() to Python 3.11.0a2
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#if PY_VERSION_HEX < 0x030B00A2 && !defined(PYPY_VERSION)
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static inline void PyThreadState_LeaveTracing(PyThreadState *tstate)
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{
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tstate->tracing--;
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int use_tracing = (tstate->c_tracefunc != NULL
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|| tstate->c_profilefunc != NULL);
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#if PY_VERSION_HEX >= 0x030A00A1
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tstate->cframe->use_tracing = use_tracing;
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#else
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tstate->use_tracing = use_tracing;
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#endif
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}
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#endif
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#endif /* GREENLET_CPYTHON_COMPAT_H */
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