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/* This files contains various key structs that are widely used
* and do not depend on other headers. */
#ifndef Py_INTERNAL_STRUCTS_H
#define Py_INTERNAL_STRUCTS_H
#ifdef __cplusplus
extern "C" {
#endif
#include <stdint.h> // uint16_t
typedef struct {
uint16_t value_and_backoff;
} _Py_BackoffCounter;
/* Each instruction in a code object is a fixed-width value,
* currently 2 bytes: 1-byte opcode + 1-byte oparg. The EXTENDED_ARG
* opcode allows for larger values but the current limit is 3 uses
* of EXTENDED_ARG (see Python/compile.c), for a maximum
* 32-bit value. This aligns with the note in Python/compile.c
* (compiler_addop_i_line) indicating that the max oparg value is
* 2**32 - 1, rather than INT_MAX.
*/
typedef union {
uint16_t cache;
struct {
uint8_t code;
uint8_t arg;
} op;
_Py_BackoffCounter counter; // First cache entry of specializable op
} _Py_CODEUNIT;
/* Abstract tree node. */
typedef struct {
PyObject_HEAD
} PyHamtNode;
/* An HAMT immutable mapping collection. */
typedef struct {
PyObject_HEAD
PyHamtNode *h_root;
PyObject *h_weakreflist;
Py_ssize_t h_count;
} PyHamtObject;
typedef struct {
PyObject_VAR_HEAD
uint32_t b_bitmap;
PyObject *b_array[1];
} PyHamtNode_Bitmap;
#include "pycore_context.h" // _PyContextTokenMissing
// Define this to get precise tracking of stackrefs.
// #define Py_STACKREF_DEBUG 1
// Define this to get precise tracking of closed stackrefs.
// This will use unbounded memory, as it can only grow.
// Use this to track double closes in short-lived programs
// #define Py_STACKREF_CLOSE_DEBUG 1
typedef union _PyStackRef {
#if !defined(Py_GIL_DISABLED) && defined(Py_STACKREF_DEBUG)
uint64_t index;
#else
uintptr_t bits;
#endif
} _PyStackRef;
// A stackref that can be stored in a regular C local variable and be visible
// to the GC in the free threading build.
// Used in combination with _PyThreadState_PushCStackRef().
typedef struct _PyCStackRef {
_PyStackRef ref;
#ifdef Py_GIL_DISABLED
struct _PyCStackRef *next;
#endif
} _PyCStackRef;
#ifdef __cplusplus
}
#endif
#endif /* Py_INTERNAL_STRUCTS_H */
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