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#ifndef Py_INTERNAL_CELL_H
#define Py_INTERNAL_CELL_H
#include "pycore_critical_section.h"
#include "pycore_object.h"
#include "pycore_stackref.h"
#ifdef __cplusplus
extern "C" {
#endif
#ifndef Py_BUILD_CORE
# error "this header requires Py_BUILD_CORE define"
#endif
// Sets the cell contents to `value` and return previous contents. Steals a
// reference to `value`.
static inline PyObject *
PyCell_SwapTakeRef(PyCellObject *cell, PyObject *value)
{
PyObject *old_value;
Py_BEGIN_CRITICAL_SECTION(cell);
old_value = cell->ob_ref;
FT_ATOMIC_STORE_PTR_RELEASE(cell->ob_ref, value);
Py_END_CRITICAL_SECTION();
return old_value;
}
static inline void
PyCell_SetTakeRef(PyCellObject *cell, PyObject *value)
{
PyObject *old_value = PyCell_SwapTakeRef(cell, value);
Py_XDECREF(old_value);
}
// Gets the cell contents. Returns a new reference.
static inline PyObject *
PyCell_GetRef(PyCellObject *cell)
{
PyObject *res;
Py_BEGIN_CRITICAL_SECTION(cell);
#ifdef Py_GIL_DISABLED
res = _Py_XNewRefWithLock(cell->ob_ref);
#else
res = Py_XNewRef(cell->ob_ref);
#endif
Py_END_CRITICAL_SECTION();
return res;
}
static inline _PyStackRef
_PyCell_GetStackRef(PyCellObject *cell)
{
PyObject *value;
#ifdef Py_GIL_DISABLED
value = _Py_atomic_load_ptr(&cell->ob_ref);
if (value == NULL) {
return PyStackRef_NULL;
}
_PyStackRef ref;
if (_Py_TryIncrefCompareStackRef(&cell->ob_ref, value, &ref)) {
return ref;
}
#endif
value = PyCell_GetRef(cell);
if (value == NULL) {
return PyStackRef_NULL;
}
return PyStackRef_FromPyObjectSteal(value);
}
#ifdef __cplusplus
}
#endif
#endif /* !Py_INTERNAL_CELL_H */
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