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python 2.7 -> python 3.14

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d1str4ught
2026-02-09 01:07:43 +01:00
parent 0ca2a293c8
commit 85609303d8
664 changed files with 666292 additions and 9725 deletions
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263
extern/include/python/objimpl.h vendored
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@@ -1,12 +1,8 @@
/* The PyObject_ memory family: high-level object memory interfaces.
See pymem.h for the low-level PyMem_ family.
*/
// The PyObject_ memory family: high-level object memory interfaces.
// See pymem.h for the low-level PyMem_ family.
#ifndef Py_OBJIMPL_H
#define Py_OBJIMPL_H
#include "pymem.h"
#ifdef __cplusplus
extern "C" {
#endif
@@ -38,8 +34,8 @@ Functions and macros for modules that implement new object types.
object with room for n items. In addition to the refcount and type pointer
fields, this also fills in the ob_size field.
- PyObject_Del(op) releases the memory allocated for an object. It does not
run a destructor -- it only frees the memory. PyObject_Free is identical.
- PyObject_Free(op) releases the memory allocated for an object. It does not
run a destructor -- it only frees the memory.
- PyObject_Init(op, typeobj) and PyObject_InitVar(op, typeobj, n) don't
allocate memory. Instead of a 'type' parameter, they take a pointer to a
@@ -48,15 +44,15 @@ Functions and macros for modules that implement new object types.
Note that objects created with PyObject_{New, NewVar} are allocated using the
specialized Python allocator (implemented in obmalloc.c), if WITH_PYMALLOC is
enabled. In addition, a special debugging allocator is used if PYMALLOC_DEBUG
is also #defined.
enabled. In addition, a special debugging allocator is used if Py_DEBUG
macro is also defined.
In case a specific form of memory management is needed (for example, if you
must use the platform malloc heap(s), or shared memory, or C++ local storage or
operator new), you must first allocate the object with your custom allocator,
then pass its pointer to PyObject_{Init, InitVar} for filling in its Python-
specific fields: reference count, type pointer, possibly others. You should
be aware that Python no control over these objects because they don't
be aware that Python has no control over these objects because they don't
cooperate with the Python memory manager. Such objects may not be eligible
for automatic garbage collection and you have to make sure that they are
released accordingly whenever their destructor gets called (cf. the specific
@@ -94,52 +90,23 @@ PyObject_{New, NewVar, Del}.
the object gets initialized via PyObject_{Init, InitVar} after obtaining
the raw memory.
*/
PyAPI_FUNC(void *) PyObject_Malloc(size_t);
PyAPI_FUNC(void *) PyObject_Realloc(void *, size_t);
PyAPI_FUNC(void) PyObject_Free(void *);
PyAPI_FUNC(void *) PyObject_Malloc(size_t size);
#if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 >= 0x03050000
PyAPI_FUNC(void *) PyObject_Calloc(size_t nelem, size_t elsize);
#endif
PyAPI_FUNC(void *) PyObject_Realloc(void *ptr, size_t new_size);
PyAPI_FUNC(void) PyObject_Free(void *ptr);
/* Macros */
#ifdef WITH_PYMALLOC
#ifdef PYMALLOC_DEBUG /* WITH_PYMALLOC && PYMALLOC_DEBUG */
PyAPI_FUNC(void *) _PyObject_DebugMalloc(size_t nbytes);
PyAPI_FUNC(void *) _PyObject_DebugRealloc(void *p, size_t nbytes);
PyAPI_FUNC(void) _PyObject_DebugFree(void *p);
PyAPI_FUNC(void) _PyObject_DebugDumpAddress(const void *p);
PyAPI_FUNC(void) _PyObject_DebugCheckAddress(const void *p);
PyAPI_FUNC(void) _PyObject_DebugMallocStats(void);
PyAPI_FUNC(void *) _PyObject_DebugMallocApi(char api, size_t nbytes);
PyAPI_FUNC(void *) _PyObject_DebugReallocApi(char api, void *p, size_t nbytes);
PyAPI_FUNC(void) _PyObject_DebugFreeApi(char api, void *p);
PyAPI_FUNC(void) _PyObject_DebugCheckAddressApi(char api, const void *p);
PyAPI_FUNC(void *) _PyMem_DebugMalloc(size_t nbytes);
PyAPI_FUNC(void *) _PyMem_DebugRealloc(void *p, size_t nbytes);
PyAPI_FUNC(void) _PyMem_DebugFree(void *p);
#define PyObject_MALLOC _PyObject_DebugMalloc
#define PyObject_Malloc _PyObject_DebugMalloc
#define PyObject_REALLOC _PyObject_DebugRealloc
#define PyObject_Realloc _PyObject_DebugRealloc
#define PyObject_FREE _PyObject_DebugFree
#define PyObject_Free _PyObject_DebugFree
#else /* WITH_PYMALLOC && ! PYMALLOC_DEBUG */
// Deprecated aliases only kept for backward compatibility.
// PyObject_Del and PyObject_DEL are defined with no parameter to be able to
// use them as function pointers (ex: tp_free = PyObject_Del).
#define PyObject_MALLOC PyObject_Malloc
#define PyObject_REALLOC PyObject_Realloc
#define PyObject_FREE PyObject_Free
#endif
#else /* ! WITH_PYMALLOC */
#define PyObject_MALLOC PyMem_MALLOC
#define PyObject_REALLOC PyMem_REALLOC
#define PyObject_FREE PyMem_FREE
#endif /* WITH_PYMALLOC */
#define PyObject_Del PyObject_Free
#define PyObject_DEL PyObject_FREE
#define PyObject_DEL PyObject_Free
/* for source compatibility with 2.2 */
#define _PyObject_Del PyObject_Free
/*
* Generic object allocator interface
@@ -149,82 +116,30 @@ PyAPI_FUNC(void) _PyMem_DebugFree(void *p);
/* Functions */
PyAPI_FUNC(PyObject *) PyObject_Init(PyObject *, PyTypeObject *);
PyAPI_FUNC(PyVarObject *) PyObject_InitVar(PyVarObject *,
PyTypeObject *, Py_ssize_t);
PyTypeObject *, Py_ssize_t);
#define PyObject_INIT(op, typeobj) \
PyObject_Init(_PyObject_CAST(op), (typeobj))
#define PyObject_INIT_VAR(op, typeobj, size) \
PyObject_InitVar(_PyVarObject_CAST(op), (typeobj), (size))
PyAPI_FUNC(PyObject *) _PyObject_New(PyTypeObject *);
PyAPI_FUNC(PyVarObject *) _PyObject_NewVar(PyTypeObject *, Py_ssize_t);
#define PyObject_New(type, typeobj) \
( (type *) _PyObject_New(typeobj) )
#define PyObject_New(type, typeobj) ((type *)_PyObject_New(typeobj))
// Alias to PyObject_New(). In Python 3.8, PyObject_NEW() called directly
// PyObject_MALLOC() with _PyObject_SIZE().
#define PyObject_NEW(type, typeobj) PyObject_New(type, (typeobj))
#define PyObject_NewVar(type, typeobj, n) \
( (type *) _PyObject_NewVar((typeobj), (n)) )
/* Macros trading binary compatibility for speed. See also pymem.h.
Note that these macros expect non-NULL object pointers.*/
#define PyObject_INIT(op, typeobj) \
( Py_TYPE(op) = (typeobj), _Py_NewReference((PyObject *)(op)), (op) )
#define PyObject_INIT_VAR(op, typeobj, size) \
( Py_SIZE(op) = (size), PyObject_INIT((op), (typeobj)) )
// Alias to PyObject_NewVar(). In Python 3.8, PyObject_NEW_VAR() called
// directly PyObject_MALLOC() with _PyObject_VAR_SIZE().
#define PyObject_NEW_VAR(type, typeobj, n) PyObject_NewVar(type, (typeobj), (n))
#define _PyObject_SIZE(typeobj) ( (typeobj)->tp_basicsize )
/* _PyObject_VAR_SIZE returns the number of bytes (as size_t) allocated for a
vrbl-size object with nitems items, exclusive of gc overhead (if any). The
value is rounded up to the closest multiple of sizeof(void *), in order to
ensure that pointer fields at the end of the object are correctly aligned
for the platform (this is of special importance for subclasses of, e.g.,
str or long, so that pointers can be stored after the embedded data).
Note that there's no memory wastage in doing this, as malloc has to
return (at worst) pointer-aligned memory anyway.
*/
#if ((SIZEOF_VOID_P - 1) & SIZEOF_VOID_P) != 0
# error "_PyObject_VAR_SIZE requires SIZEOF_VOID_P be a power of 2"
#endif
#define _PyObject_VAR_SIZE(typeobj, nitems) \
(size_t) \
( ( (typeobj)->tp_basicsize + \
(nitems)*(typeobj)->tp_itemsize + \
(SIZEOF_VOID_P - 1) \
) & ~(SIZEOF_VOID_P - 1) \
)
#define PyObject_NEW(type, typeobj) \
( (type *) PyObject_Init( \
(PyObject *) PyObject_MALLOC( _PyObject_SIZE(typeobj) ), (typeobj)) )
#define PyObject_NEW_VAR(type, typeobj, n) \
( (type *) PyObject_InitVar( \
(PyVarObject *) PyObject_MALLOC(_PyObject_VAR_SIZE((typeobj),(n)) ),\
(typeobj), (n)) )
/* This example code implements an object constructor with a custom
allocator, where PyObject_New is inlined, and shows the important
distinction between two steps (at least):
1) the actual allocation of the object storage;
2) the initialization of the Python specific fields
in this storage with PyObject_{Init, InitVar}.
PyObject *
YourObject_New(...)
{
PyObject *op;
op = (PyObject *) Your_Allocator(_PyObject_SIZE(YourTypeStruct));
if (op == NULL)
return PyErr_NoMemory();
PyObject_Init(op, &YourTypeStruct);
op->ob_field = value;
...
return op;
}
Note that in C++, the use of the new operator usually implies that
the 1st step is performed automatically for you, so in a C++ class
constructor you would start directly with PyObject_Init/InitVar
*/
/*
* Garbage Collection Support
@@ -233,88 +148,42 @@ PyAPI_FUNC(PyVarObject *) _PyObject_NewVar(PyTypeObject *, Py_ssize_t);
/* C equivalent of gc.collect(). */
PyAPI_FUNC(Py_ssize_t) PyGC_Collect(void);
/* C API for controlling the state of the garbage collector */
PyAPI_FUNC(int) PyGC_Enable(void);
PyAPI_FUNC(int) PyGC_Disable(void);
PyAPI_FUNC(int) PyGC_IsEnabled(void);
/* Test if a type has a GC head */
#define PyType_IS_GC(t) PyType_HasFeature((t), Py_TPFLAGS_HAVE_GC)
/* Test if an object has a GC head */
#define PyObject_IS_GC(o) (PyType_IS_GC(Py_TYPE(o)) && \
(Py_TYPE(o)->tp_is_gc == NULL || Py_TYPE(o)->tp_is_gc(o)))
PyAPI_FUNC(PyVarObject *) _PyObject_GC_Resize(PyVarObject *, Py_ssize_t);
#define PyObject_GC_Resize(type, op, n) \
( (type *) _PyObject_GC_Resize((PyVarObject *)(op), (n)) )
/* for source compatibility with 2.2 */
#define _PyObject_GC_Del PyObject_GC_Del
/* GC information is stored BEFORE the object structure. */
typedef union _gc_head {
struct {
union _gc_head *gc_next;
union _gc_head *gc_prev;
Py_ssize_t gc_refs;
} gc;
long double dummy; /* force worst-case alignment */
} PyGC_Head;
extern PyGC_Head *_PyGC_generation0;
#define _Py_AS_GC(o) ((PyGC_Head *)(o)-1)
#define _PyGC_REFS_UNTRACKED (-2)
#define _PyGC_REFS_REACHABLE (-3)
#define _PyGC_REFS_TENTATIVELY_UNREACHABLE (-4)
/* Tell the GC to track this object. NB: While the object is tracked the
* collector it must be safe to call the ob_traverse method. */
#define _PyObject_GC_TRACK(o) do { \
PyGC_Head *g = _Py_AS_GC(o); \
if (g->gc.gc_refs != _PyGC_REFS_UNTRACKED) \
Py_FatalError("GC object already tracked"); \
g->gc.gc_refs = _PyGC_REFS_REACHABLE; \
g->gc.gc_next = _PyGC_generation0; \
g->gc.gc_prev = _PyGC_generation0->gc.gc_prev; \
g->gc.gc_prev->gc.gc_next = g; \
_PyGC_generation0->gc.gc_prev = g; \
} while (0);
/* Tell the GC to stop tracking this object.
* gc_next doesn't need to be set to NULL, but doing so is a good
* way to provoke memory errors if calling code is confused.
*/
#define _PyObject_GC_UNTRACK(o) do { \
PyGC_Head *g = _Py_AS_GC(o); \
assert(g->gc.gc_refs != _PyGC_REFS_UNTRACKED); \
g->gc.gc_refs = _PyGC_REFS_UNTRACKED; \
g->gc.gc_prev->gc.gc_next = g->gc.gc_next; \
g->gc.gc_next->gc.gc_prev = g->gc.gc_prev; \
g->gc.gc_next = NULL; \
} while (0);
/* True if the object is currently tracked by the GC. */
#define _PyObject_GC_IS_TRACKED(o) \
((_Py_AS_GC(o))->gc.gc_refs != _PyGC_REFS_UNTRACKED)
/* True if the object may be tracked by the GC in the future, or already is.
This can be useful to implement some optimizations. */
#define _PyObject_GC_MAY_BE_TRACKED(obj) \
(PyObject_IS_GC(obj) && \
(!PyTuple_CheckExact(obj) || _PyObject_GC_IS_TRACKED(obj)))
( (type *) _PyObject_GC_Resize(_PyVarObject_CAST(op), (n)) )
PyAPI_FUNC(PyObject *) _PyObject_GC_Malloc(size_t);
PyAPI_FUNC(PyObject *) _PyObject_GC_New(PyTypeObject *);
PyAPI_FUNC(PyVarObject *) _PyObject_GC_NewVar(PyTypeObject *, Py_ssize_t);
/* Tell the GC to track this object.
*
* See also private _PyObject_GC_TRACK() macro. */
PyAPI_FUNC(void) PyObject_GC_Track(void *);
/* Tell the GC to stop tracking this object.
*
* See also private _PyObject_GC_UNTRACK() macro. */
PyAPI_FUNC(void) PyObject_GC_UnTrack(void *);
PyAPI_FUNC(void) PyObject_GC_Del(void *);
#define PyObject_GC_New(type, typeobj) \
( (type *) _PyObject_GC_New(typeobj) )
_Py_CAST(type*, _PyObject_GC_New(typeobj))
#define PyObject_GC_NewVar(type, typeobj, n) \
( (type *) _PyObject_GC_NewVar((typeobj), (n)) )
_Py_CAST(type*, _PyObject_GC_NewVar((typeobj), (n)))
PyAPI_FUNC(int) PyObject_GC_IsTracked(PyObject *);
PyAPI_FUNC(int) PyObject_GC_IsFinalized(PyObject *);
/* Utility macro to help write tp_traverse functions.
* To use this macro, the tp_traverse function must name its arguments
@@ -324,31 +193,19 @@ PyAPI_FUNC(void) PyObject_GC_Del(void *);
#define Py_VISIT(op) \
do { \
if (op) { \
int vret = visit((PyObject *)(op), arg); \
int vret = visit(_PyObject_CAST(op), arg); \
if (vret) \
return vret; \
} \
} while (0)
/* This is here for the sake of backwards compatibility. Extensions that
* use the old GC API will still compile but the objects will not be
* tracked by the GC. */
#define PyGC_HEAD_SIZE 0
#define PyObject_GC_Init(op)
#define PyObject_GC_Fini(op)
#define PyObject_AS_GC(op) (op)
#define PyObject_FROM_GC(op) (op)
/* Test if a type supports weak references */
#define PyType_SUPPORTS_WEAKREFS(t) \
(PyType_HasFeature((t), Py_TPFLAGS_HAVE_WEAKREFS) \
&& ((t)->tp_weaklistoffset > 0))
#define PyObject_GET_WEAKREFS_LISTPTR(o) \
((PyObject **) (((char *) (o)) + Py_TYPE(o)->tp_weaklistoffset))
#ifndef Py_LIMITED_API
# define Py_CPYTHON_OBJIMPL_H
# include "cpython/objimpl.h"
# undef Py_CPYTHON_OBJIMPL_H
#endif
#ifdef __cplusplus
}
#endif
#endif /* !Py_OBJIMPL_H */
#endif // !Py_OBJIMPL_H