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#ifndef GREENLET_MSVC_COMPAT_HPP
#define GREENLET_MSVC_COMPAT_HPP
/*
* Support for MSVC on Windows.
*
* Beginning with Python 3.14, some of the internal
* include files we need are not compatible with MSVC
* in C++ mode:
*
* internal\pycore_stackref.h(253): error C4576: a parenthesized type
* followed by an initializer list is a non-standard explicit type conversion syntax
*
* This file is included from ``internal/pycore_interpframe.h``, which
* we need for the ``_PyFrame_IsIncomplete`` API.
*
* Unfortunately, that API is a ``static inline`` function, as are a
* bunch of the functions it calls. The only solution seems to be to
* copy those definitions and the supporting inline functions here.
*
* Now, this makes us VERY fragile to changes in those functions. Because
* they're internal and static, the CPython devs might feel free to change
* them in even minor versions, meaning that we could runtime link and load,
* but still crash. We have that problem on all platforms though. It's just worse
* here because we have to keep copying the updated definitions.
*/
#include <Python.h>
#include "greenlet_cpython_compat.hpp"
// This file is only included on 3.14+
extern "C" {
// pycore_code.h ----------------
#define _PyCode_CODE(CO) _Py_RVALUE((_Py_CODEUNIT *)(CO)->co_code_adaptive)
// End pycore_code.h ----------
// pycore_interpframe.h ----------
#if !defined(Py_GIL_DISABLED) && defined(Py_STACKREF_DEBUG)
#define Py_TAG_BITS 0
#else
#define Py_TAG_BITS ((uintptr_t)1)
#define Py_TAG_DEFERRED (1)
#endif
static const _PyStackRef PyStackRef_NULL = { .bits = Py_TAG_DEFERRED};
#define PyStackRef_IsNull(stackref) ((stackref).bits == PyStackRef_NULL.bits)
static inline PyObject *
PyStackRef_AsPyObjectBorrow(_PyStackRef stackref)
{
PyObject *cleared = ((PyObject *)((stackref).bits & (~Py_TAG_BITS)));
return cleared;
}
static inline PyCodeObject *_PyFrame_GetCode(_PyInterpreterFrame *f) {
assert(!PyStackRef_IsNull(f->f_executable));
PyObject *executable = PyStackRef_AsPyObjectBorrow(f->f_executable);
assert(PyCode_Check(executable));
return (PyCodeObject *)executable;
}
static inline _Py_CODEUNIT *
_PyFrame_GetBytecode(_PyInterpreterFrame *f)
{
#ifdef Py_GIL_DISABLED
PyCodeObject *co = _PyFrame_GetCode(f);
_PyCodeArray *tlbc = _PyCode_GetTLBCArray(co);
assert(f->tlbc_index >= 0 && f->tlbc_index < tlbc->size);
return (_Py_CODEUNIT *)tlbc->entries[f->tlbc_index];
#else
return _PyCode_CODE(_PyFrame_GetCode(f));
#endif
}
static inline bool //_Py_NO_SANITIZE_THREAD
_PyFrame_IsIncomplete(_PyInterpreterFrame *frame)
{
if (frame->owner >= FRAME_OWNED_BY_INTERPRETER) {
return true;
}
return frame->owner != FRAME_OWNED_BY_GENERATOR &&
frame->instr_ptr < _PyFrame_GetBytecode(frame) +
_PyFrame_GetCode(frame)->_co_firsttraceable;
}
// pycore_interpframe.h ----------
}
#endif // GREENLET_MSVC_COMPAT_HPP