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Edit File : greenlet_msvc_compat.hpp \| Size : 2.91 KB
#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 Back

Edit File : greenlet_msvc_compat.hpp | Size : 2.91 KB

#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

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