malloc_usable_size(3)      Library Functions Manual      malloc_usable_size(3)

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       malloc_usable_size - <?><?><?><?><?><?> <?><?><?><?><?>
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       <?><?><?><?><?> C (libc, -lc)

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       #include <malloc.h>

       size_t malloc_usable_size(void *_Nullable ptr);

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       This function can be used for diagnostics or statistics about
       allocations from malloc(3)  or a related function.

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       malloc_usable_size()  returns a value no less than the size of the
       block of allocated memory pointed to by ptr.  If ptr is NULL, 0 is
       returned.

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       +----------------------------+----------------------------------------------------------+--------------------------+
       |<?><?><?><?><?><?><?><?><?> | <?><?><?><?><?><?><?>                                    | <?><?><?><?><?><?><?><?> |
       +----------------------------+----------------------------------------------------------+--------------------------+
       |malloc_usable_size()        | <?><?><?><?><?><?><?><?><?><?><?><?> <?> <?><?><?><?><?> | MT-Safe                  |
       +----------------------------+----------------------------------------------------------+--------------------------+
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       GNU.

CAVEATS
       The value returned by malloc_usable_size()  may be greater than the
       requested size of the allocation because of various internal
       implementation details, none of which the programmer should rely on.
       This function is intended to only be used for diagnostics and
       statistics; writing to the excess memory without first calling
       realloc(3)  to resize the allocation is not supported.  The returned
       value is only valid at the time of the call.

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       malloc(3)

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       <?><?><?><?><?><?><?><?><?><?>(<?>) aereiae <aereiae@gmail.com>, Alexey
       <a.chepugov@gmail.com>, Azamat Hackimov <azamat.hackimov@gmail.com>,
       Dmitriy S. Seregin <dseregin@59.ru>, Dmitry Bolkhovskikh
       <d20052005@yandex.ru>, ITriskTI <ITriskTI@gmail.com>, Max Is
       <ismax799@gmail.com>, Yuri Kozlov <yuray@komyakino.ru>, <?><?><?><?>
       <?><?><?><?><?><?> <pavia00@gmail.com>, <?><?><?><?><?><?><?>
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       <maljanow@outlook.com> <?> Kirill Rekhov <krekhov.dev@gmail.com>

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       <?><?><?><?><?><?><?><?> GNU (GNU General Public License - GPL,
       <https://www.gnu.org/licenses/gpl-3.0.html> <?><?><?><?><?><?> 3
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       <<debian-l10n-russian@lists.debian.org>>.

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                             2 <?><?><?> 2024 <?>.       malloc_usable_size(3)