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Editing: pycore_atexit.h

#ifndef Py_INTERNAL_ATEXIT_H
#define Py_INTERNAL_ATEXIT_H

#include "pycore_lock.h"        // PyMutex

#ifdef __cplusplus
extern "C" {
#endif

#ifndef Py_BUILD_CORE
#  error "this header requires Py_BUILD_CORE define"
#endif

//###############
// runtime atexit

typedef void (*atexit_callbackfunc)(void);

struct _atexit_runtime_state {
    PyMutex mutex;
#define NEXITFUNCS 32
    atexit_callbackfunc callbacks[NEXITFUNCS];
    int ncallbacks;
};

//###################
// interpreter atexit

typedef void (*atexit_datacallbackfunc)(void *);

typedef struct atexit_callback {
    atexit_datacallbackfunc func;
    void *data;
    struct atexit_callback *next;
} atexit_callback;

typedef struct {
    PyObject *func;
    PyObject *args;
    PyObject *kwargs;
} atexit_py_callback;

struct atexit_state {
    atexit_callback *ll_callbacks;
    // Kept for ABI compatibility--do not use! (See GH-127791.)
    atexit_callback *last_ll_callback;

// XXX The rest of the state could be moved to the atexit module state
    // and a low-level callback added for it during module exec.
    // For the moment we leave it here.
    atexit_py_callback **callbacks;
    int ncallbacks;
    int callback_len;
};

// Export for '_interpchannels' shared extension
PyAPI_FUNC(int) _Py_AtExit(
    PyInterpreterState *interp,
    atexit_datacallbackfunc func,
    void *data);

#ifdef __cplusplus
}
#endif
#endif /* !Py_INTERNAL_ATEXIT_H */

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