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File Content: `pycore_pymem.h`

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

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

#include "pymem.h"      // PyMemAllocatorName


typedef struct {
    /* We tag each block with an API ID in order to tag API violations */
    char api_id;
    PyMemAllocatorEx alloc;
} debug_alloc_api_t;

struct _pymem_allocators {
    PyThread_type_lock mutex;
    struct {
        PyMemAllocatorEx raw;
        PyMemAllocatorEx mem;
        PyMemAllocatorEx obj;
    } standard;
    struct {
        debug_alloc_api_t raw;
        debug_alloc_api_t mem;
        debug_alloc_api_t obj;
    } debug;
    PyObjectArenaAllocator obj_arena;
};


/* Set the memory allocator of the specified domain to the default.
   Save the old allocator into *old_alloc if it's non-NULL.
   Return on success, or return -1 if the domain is unknown. */
PyAPI_FUNC(int) _PyMem_SetDefaultAllocator(
    PyMemAllocatorDomain domain,
    PyMemAllocatorEx *old_alloc);

/* Special bytes broadcast into debug memory blocks at appropriate times.
   Strings of these are unlikely to be valid addresses, floats, ints or
   7-bit ASCII.

   - PYMEM_CLEANBYTE: clean (newly allocated) memory
   - PYMEM_DEADBYTE dead (newly freed) memory
   - PYMEM_FORBIDDENBYTE: untouchable bytes at each end of a block

   Byte patterns 0xCB, 0xDB and 0xFB have been replaced with 0xCD, 0xDD and
   0xFD to use the same values than Windows CRT debug malloc() and free().
   If modified, _PyMem_IsPtrFreed() should be updated as well. */
#define PYMEM_CLEANBYTE      0xCD
#define PYMEM_DEADBYTE       0xDD
#define PYMEM_FORBIDDENBYTE  0xFD

/* Heuristic checking if a pointer value is newly allocated
   (uninitialized), newly freed or NULL (is equal to zero).

   The pointer is not dereferenced, only the pointer value is checked.

   The heuristic relies on the debug hooks on Python memory allocators which
   fills newly allocated memory with CLEANBYTE (0xCD) and newly freed memory
   with DEADBYTE (0xDD). Detect also "untouchable bytes" marked
   with FORBIDDENBYTE (0xFD). */
static inline int _PyMem_IsPtrFreed(const void *ptr)
{
    uintptr_t value = (uintptr_t)ptr;
#if SIZEOF_VOID_P == 8
    return (value == 0
            || value == (uintptr_t)0xCDCDCDCDCDCDCDCD
            || value == (uintptr_t)0xDDDDDDDDDDDDDDDD
            || value == (uintptr_t)0xFDFDFDFDFDFDFDFD);
#elif SIZEOF_VOID_P == 4
    return (value == 0
            || value == (uintptr_t)0xCDCDCDCD
            || value == (uintptr_t)0xDDDDDDDD
            || value == (uintptr_t)0xFDFDFDFD);
#else
#  error "unknown pointer size"
#endif
}

PyAPI_FUNC(int) _PyMem_GetAllocatorName(
    const char *name,
    PyMemAllocatorName *allocator);

/* Configure the Python memory allocators.
   Pass PYMEM_ALLOCATOR_DEFAULT to use default allocators.
   PYMEM_ALLOCATOR_NOT_SET does nothing. */
PyAPI_FUNC(int) _PyMem_SetupAllocators(PyMemAllocatorName allocator);


#ifdef __cplusplus
}
#endif
#endif /* !Py_INTERNAL_PYMEM_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_pymem.h

File Content: `pycore_pymem.h`