mirror of https://github.com/python/cpython.git
89 lines
2.1 KiB
C
89 lines
2.1 KiB
C
/* 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 */
|