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#ifndef Py_INTERNAL_INTERP_H
#define Py_INTERNAL_INTERP_H
#ifdef __cplusplus
extern "C" {
#endif
#ifndef Py_BUILD_CORE
# error "this header requires Py_BUILD_CORE define"
#endif
#include "pycore_atomic.h" // _Py_atomic_address
#include "pycore_ast_state.h" // struct ast_state
#include "pycore_gil.h" // struct _gil_runtime_state
#include "pycore_gc.h" // struct _gc_runtime_state
#include "pycore_warnings.h" // struct _warnings_runtime_state
struct _pending_calls {
PyThread_type_lock lock;
/* Request for running pending calls. */
_Py_atomic_int calls_to_do;
/* Request for looking at the `async_exc` field of the current
thread state.
Guarded by the GIL. */
int async_exc;
#define NPENDINGCALLS 32
struct {
int (*func)(void *);
void *arg;
} calls[NPENDINGCALLS];
int first;
int last;
};
struct _ceval_state {
int recursion_limit;
/* This single variable consolidates all requests to break out of
the fast path in the eval loop. */
_Py_atomic_int eval_breaker;
/* Request for dropping the GIL */
_Py_atomic_int gil_drop_request;
struct _pending_calls pending;
#ifdef EXPERIMENTAL_ISOLATED_SUBINTERPRETERS
struct _gil_runtime_state gil;
#endif
};
/* fs_codec.encoding is initialized to NULL.
Later, it is set to a non-NULL string by _PyUnicode_InitEncodings(). */
struct _Py_unicode_fs_codec {
char *encoding; // Filesystem encoding (encoded to UTF-8)
int utf8; // encoding=="utf-8"?
char *errors; // Filesystem errors (encoded to UTF-8)
_Py_error_handler error_handler;
};
struct _Py_bytes_state {
PyObject *empty_string;
PyBytesObject *characters[256];
};
struct _Py_unicode_ids {
Py_ssize_t size;
PyObject **array;
};
struct _Py_unicode_state {
// The empty Unicode object is a singleton to improve performance.
PyObject *empty_string;
/* Single character Unicode strings in the Latin-1 range are being
shared as well. */
PyObject *latin1[256];
struct _Py_unicode_fs_codec fs_codec;
// Unused member kept for ABI backward compatibility with Python 3.10.0:
// see bpo-46006.
PyObject *unused_interned;
// Unicode identifiers (_Py_Identifier): see _PyUnicode_FromId()
struct _Py_unicode_ids ids;
};
struct _Py_float_state {
/* Special free list
free_list is a singly-linked list of available PyFloatObjects,
linked via abuse of their ob_type members. */
int numfree;
PyFloatObject *free_list;
};
/* Speed optimization to avoid frequent malloc/free of small tuples */
#ifndef PyTuple_MAXSAVESIZE
// Largest tuple to save on free list
# define PyTuple_MAXSAVESIZE 20
#endif
#ifndef PyTuple_MAXFREELIST
// Maximum number of tuples of each size to save
# define PyTuple_MAXFREELIST 2000
#endif
struct _Py_tuple_state {
#if PyTuple_MAXSAVESIZE > 0
/* Entries 1 up to PyTuple_MAXSAVESIZE are free lists,
entry 0 is the empty tuple () of which at most one instance
will be allocated. */
PyTupleObject *free_list[PyTuple_MAXSAVESIZE];
int numfree[PyTuple_MAXSAVESIZE];
#endif
};
/* Empty list reuse scheme to save calls to malloc and free */
#ifndef PyList_MAXFREELIST
# define PyList_MAXFREELIST 80
#endif
struct _Py_list_state {
PyListObject *free_list[PyList_MAXFREELIST];
int numfree;
};
#ifndef PyDict_MAXFREELIST
# define PyDict_MAXFREELIST 80
#endif
struct _Py_dict_state {
/* Dictionary reuse scheme to save calls to malloc and free */
PyDictObject *free_list[PyDict_MAXFREELIST];
int numfree;
PyDictKeysObject *keys_free_list[PyDict_MAXFREELIST];
int keys_numfree;
};
struct _Py_frame_state {
PyFrameObject *free_list;
/* number of frames currently in free_list */
int numfree;
};
#ifndef _PyAsyncGen_MAXFREELIST
# define _PyAsyncGen_MAXFREELIST 80
#endif
struct _Py_async_gen_state {
/* Freelists boost performance 6-10%; they also reduce memory
fragmentation, as _PyAsyncGenWrappedValue and PyAsyncGenASend
are short-living objects that are instantiated for every
__anext__() call. */
struct _PyAsyncGenWrappedValue* value_freelist[_PyAsyncGen_MAXFREELIST];
int value_numfree;
struct PyAsyncGenASend* asend_freelist[_PyAsyncGen_MAXFREELIST];
int asend_numfree;
};
struct _Py_context_state {
// List of free PyContext objects
PyContext *freelist;
int numfree;
};
struct _Py_exc_state {
// The dict mapping from errno codes to OSError subclasses
PyObject *errnomap;
PyBaseExceptionObject *memerrors_freelist;
int memerrors_numfree;
};
// atexit state
typedef struct {
PyObject *func;
PyObject *args;
PyObject *kwargs;
} atexit_callback;
struct atexit_state {
atexit_callback **callbacks;
int ncallbacks;
int callback_len;
};
// Type attribute lookup cache: speed up attribute and method lookups,
// see _PyType_Lookup().
struct type_cache_entry {
unsigned int version; // initialized from type->tp_version_tag
PyObject *name; // reference to exactly a str or None
PyObject *value; // borrowed reference or NULL
};
#define MCACHE_SIZE_EXP 12
#define MCACHE_STATS 0
struct type_cache {
struct type_cache_entry hashtable[1 << MCACHE_SIZE_EXP];
#if MCACHE_STATS
size_t hits;
size_t misses;
size_t collisions;
#endif
};
/* interpreter state */
#define _PY_NSMALLPOSINTS 257
#define _PY_NSMALLNEGINTS 5
// _PyLong_GetZero() and _PyLong_GetOne() must always be available
#if _PY_NSMALLPOSINTS < 2
# error "_PY_NSMALLPOSINTS must be greater than 1"
#endif
// The PyInterpreterState typedef is in Include/pystate.h.
struct _is {
struct _is *next;
struct _ts *tstate_head;
/* Reference to the _PyRuntime global variable. This field exists
to not have to pass runtime in addition to tstate to a function.
Get runtime from tstate: tstate->interp->runtime. */
struct pyruntimestate *runtime;
int64_t id;
int64_t id_refcount;
int requires_idref;
PyThread_type_lock id_mutex;
int finalizing;
struct _ceval_state ceval;
struct _gc_runtime_state gc;
// sys.modules dictionary
PyObject *modules;
PyObject *modules_by_index;
// Dictionary of the sys module
PyObject *sysdict;
// Dictionary of the builtins module
PyObject *builtins;
// importlib module
PyObject *importlib;
/* Used in Modules/_threadmodule.c. */
long num_threads;
/* Support for runtime thread stack size tuning.
A value of 0 means using the platform's default stack size
or the size specified by the THREAD_STACK_SIZE macro. */
/* Used in Python/thread.c. */
size_t pythread_stacksize;
PyObject *codec_search_path;
PyObject *codec_search_cache;
PyObject *codec_error_registry;
int codecs_initialized;
PyConfig config;
#ifdef HAVE_DLOPEN
int dlopenflags;
#endif
PyObject *dict; /* Stores per-interpreter state */
PyObject *builtins_copy;
PyObject *import_func;
// Initialized to _PyEval_EvalFrameDefault().
_PyFrameEvalFunction eval_frame;
Py_ssize_t co_extra_user_count;
freefunc co_extra_freefuncs[MAX_CO_EXTRA_USERS];
#ifdef HAVE_FORK
PyObject *before_forkers;
PyObject *after_forkers_parent;
PyObject *after_forkers_child;
#endif
uint64_t tstate_next_unique_id;
struct _warnings_runtime_state warnings;
struct atexit_state atexit;
PyObject *audit_hooks;
/* Small integers are preallocated in this array so that they
can be shared.
The integers that are preallocated are those in the range
-_PY_NSMALLNEGINTS (inclusive) to _PY_NSMALLPOSINTS (not inclusive).
*/
PyLongObject* small_ints[_PY_NSMALLNEGINTS + _PY_NSMALLPOSINTS];
struct _Py_bytes_state bytes;
struct _Py_unicode_state unicode;
struct _Py_float_state float_state;
/* Using a cache is very effective since typically only a single slice is
created and then deleted again. */
PySliceObject *slice_cache;
struct _Py_tuple_state tuple;
struct _Py_list_state list;
struct _Py_dict_state dict_state;
struct _Py_frame_state frame;
struct _Py_async_gen_state async_gen;
struct _Py_context_state context;
struct _Py_exc_state exc_state;
struct ast_state ast;
struct type_cache type_cache;
int int_max_str_digits;
};
extern void _PyInterpreterState_ClearModules(PyInterpreterState *interp);
extern void _PyInterpreterState_Clear(PyThreadState *tstate);
/* cross-interpreter data registry */
/* For now we use a global registry of shareable classes. An
alternative would be to add a tp_* slot for a class's
crossinterpdatafunc. It would be simpler and more efficient. */
struct _xidregitem;
struct _xidregitem {
PyTypeObject *cls;
crossinterpdatafunc getdata;
struct _xidregitem *next;
};
PyAPI_FUNC(struct _is*) _PyInterpreterState_LookUpID(int64_t);
PyAPI_FUNC(int) _PyInterpreterState_IDInitref(struct _is *);
PyAPI_FUNC(int) _PyInterpreterState_IDIncref(struct _is *);
PyAPI_FUNC(void) _PyInterpreterState_IDDecref(struct _is *);
#ifdef __cplusplus
}
#endif
#endif /* !Py_INTERNAL_INTERP_H */