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/* Adapted from CPython 3.8's ceval.h. */
typedef struct PyThreadState PyThreadState;
extern PyThreadState * PyEval_SaveThread(void);
extern void PyEval_RestoreThread(PyThreadState *);
#define Py_BEGIN_ALLOW_THREADS { \
PyThreadState *_save; \
_save = PyEval_SaveThread();
#define Py_BLOCK_THREADS PyEval_RestoreThread(_save);
#define Py_UNBLOCK_THREADS _save = PyEval_SaveThread();
#define Py_END_ALLOW_THREADS PyEval_RestoreThread(_save); \
}
/* Adapted/hacked up from CPython 3.8's object.h. */
typedef struct _object {
int ob_refcnt;
} PyObject;
#define _PyObject_CAST(op) ((PyObject*)(op))
extern void _Py_Dealloc(PyObject *);
#define _Py_INCREF(OP) do { (OP)->ob_refcnt++; } while (0);
#define _Py_DECREF(OP) do { \
if (--(OP)->ob_refcnt == 0) { \
_Py_Dealloc(OP); \
} \
} while (0)
#define Py_INCREF(op) _Py_INCREF(_PyObject_CAST(op))
#define Py_DECREF(op) _Py_DECREF(_PyObject_CAST(op))
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