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File Content: `pycore_pyarena.h`

/* An arena-like memory interface for the compiler.
 */

#ifndef Py_INTERNAL_PYARENA_H
#define Py_INTERNAL_PYARENA_H
#ifdef __cplusplus
extern "C" {
#endif

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

typedef struct _arena PyArena;

/* _PyArena_New() and _PyArena_Free() create a new arena and free it,
   respectively.  Once an arena has been created, it can be used
   to allocate memory via _PyArena_Malloc().  Pointers to PyObject can
   also be registered with the arena via _PyArena_AddPyObject(), and the
   arena will ensure that the PyObjects stay alive at least until
   _PyArena_Free() is called.  When an arena is freed, all the memory it
   allocated is freed, the arena releases internal references to registered
   PyObject*, and none of its pointers are valid.
   XXX (tim) What does "none of its pointers are valid" mean?  Does it
   XXX mean that pointers previously obtained via _PyArena_Malloc() are
   XXX no longer valid?  (That's clearly true, but not sure that's what
   XXX the text is trying to say.)

   _PyArena_New() returns an arena pointer.  On error, it
   returns a negative number and sets an exception.
   XXX (tim):  Not true.  On error, _PyArena_New() actually returns NULL,
   XXX and looks like it may or may not set an exception (e.g., if the
   XXX internal PyList_New(0) returns NULL, _PyArena_New() passes that on
   XXX and an exception is set; OTOH, if the internal
   XXX block_new(DEFAULT_BLOCK_SIZE) returns NULL, that's passed on but
   XXX an exception is not set in that case).
*/
PyAPI_FUNC(PyArena*) _PyArena_New(void);
PyAPI_FUNC(void) _PyArena_Free(PyArena *);

/* Mostly like malloc(), return the address of a block of memory spanning
 * `size` bytes, or return NULL (without setting an exception) if enough
 * new memory can't be obtained.  Unlike malloc(0), _PyArena_Malloc() with
 * size=0 does not guarantee to return a unique pointer (the pointer
 * returned may equal one or more other pointers obtained from
 * _PyArena_Malloc()).
 * Note that pointers obtained via _PyArena_Malloc() must never be passed to
 * the system free() or realloc(), or to any of Python's similar memory-
 * management functions.  _PyArena_Malloc()-obtained pointers remain valid
 * until _PyArena_Free(ar) is called, at which point all pointers obtained
 * from the arena `ar` become invalid simultaneously.
 */
PyAPI_FUNC(void*) _PyArena_Malloc(PyArena *, size_t size);

/* This routine isn't a proper arena allocation routine.  It takes
 * a PyObject* and records it so that it can be DECREFed when the
 * arena is freed.
 */
PyAPI_FUNC(int) _PyArena_AddPyObject(PyArena *, PyObject *);

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

Name	Size	Permission
pycore_abstract.h	611 bytes	0644
pycore_asdl.h	3035 bytes	0644
pycore_ast.h	31288 bytes	0644
pycore_ast_state.h	6749 bytes	0644
pycore_atexit.h	1149 bytes	0644
pycore_atomic.h	16979 bytes	0644
pycore_atomic_funcs.h	2438 bytes	0644
pycore_bitutils.h	6062 bytes	0644
pycore_blocks_output_buffer.h	8688 bytes	0644
pycore_bytes_methods.h	3384 bytes	0644
pycore_bytesobject.h	1339 bytes	0644
pycore_call.h	3920 bytes	0644
pycore_ceval.h	5265 bytes	0644
pycore_ceval_state.h	2744 bytes	0644
pycore_code.h	15835 bytes	0644
pycore_compile.h	3453 bytes	0644
pycore_condvar.h	2909 bytes	0644
pycore_context.h	1301 bytes	0644
pycore_descrobject.h	499 bytes	0644
pycore_dict.h	6384 bytes	0644
pycore_dict_state.h	1095 bytes	0644
pycore_dtoa.h	1615 bytes	0644
pycore_emscripten_signal.h	562 bytes	0644
pycore_exceptions.h	842 bytes	0644
pycore_faulthandler.h	2220 bytes	0644
pycore_fileutils.h	7910 bytes	0644
pycore_fileutils_windows.h	2724 bytes	0644
pycore_floatobject.h	1578 bytes	0644
pycore_flowgraph.h	4630 bytes	0644
pycore_format.h	480 bytes	0644
pycore_frame.h	9255 bytes	0644
pycore_function.h	611 bytes	0644
pycore_gc.h	7658 bytes	0644
pycore_genobject.h	1186 bytes	0644
pycore_getopt.h	490 bytes	0644
pycore_gil.h	1565 bytes	0644
pycore_global_objects.h	3035 bytes	0644
pycore_global_objects_fini_generated.h	115361 bytes	0644
pycore_global_strings.h	25438 bytes	0644
pycore_hamt.h	3742 bytes	0644
pycore_hashtable.h	4286 bytes	0644
pycore_import.h	6358 bytes	0644
pycore_initconfig.h	5706 bytes	0644
pycore_instruments.h	2998 bytes	0644
pycore_interp.h	9086 bytes	0644
pycore_intrinsics.h	1397 bytes	0644
pycore_list.h	1980 bytes	0644
pycore_long.h	7805 bytes	0644
pycore_memoryobject.h	383 bytes	0644
pycore_moduleobject.h	1192 bytes	0644
pycore_namespace.h	392 bytes	0644
pycore_object.h	14917 bytes	0644
pycore_object_state.h	1016 bytes	0644
pycore_obmalloc.h	27284 bytes	0644
pycore_obmalloc_init.h	2085 bytes	0644
pycore_opcode.h	20081 bytes	0644
pycore_opcode_utils.h	2686 bytes	0644
pycore_parser.h	1358 bytes	0644
pycore_pathconfig.h	606 bytes	0644
pycore_pyarena.h	2733 bytes	0644
pycore_pyerrors.h	3110 bytes	0644
pycore_pyhash.h	709 bytes	0644
pycore_pylifecycle.h	3365 bytes	0644
pycore_pymath.h	8600 bytes	0644
pycore_pymem.h	3040 bytes	0644
pycore_pymem_init.h	2654 bytes	0644
pycore_pystate.h	4982 bytes	0644
pycore_pythread.h	2075 bytes	0644
pycore_range.h	346 bytes	0644
pycore_runtime.h	8429 bytes	0644
pycore_runtime_init.h	5912 bytes	0644
pycore_runtime_init_generated.h	45751 bytes	0644
pycore_signal.h	2611 bytes	0644
pycore_sliceobject.h	414 bytes	0644
pycore_strhex.h	937 bytes	0644
pycore_structseq.h	923 bytes	0644
pycore_symtable.h	7035 bytes	0644
pycore_sysmodule.h	999 bytes	0644
pycore_time.h	388 bytes	0644
pycore_token.h	3050 bytes	0644
pycore_traceback.h	3501 bytes	0644
pycore_tracemalloc.h	3075 bytes	0644
pycore_tuple.h	2197 bytes	0644
pycore_typeobject.h	4731 bytes	0644
pycore_typevarobject.h	763 bytes	0644
pycore_ucnhash.h	898 bytes	0644
pycore_unicodeobject.h	2657 bytes	0644
pycore_unicodeobject_generated.h	125516 bytes	0644
pycore_unionobject.h	682 bytes	0644
pycore_warnings.h	740 bytes	0644

File Content: pycore_pyarena.h

File Content: `pycore_pyarena.h`