개요

• 솔라나라에 설명된 어플리케이션에 대해 맨 페이지를 찾아 출력한다.
• MAN 페이지에 대한 설명은 윈디하나의 솔라나라: MAN 페이지을 참고하자.
• svcadm(1M)을 검색하려면 섹션에서 1M 을 선택하고, 맨 페이지 이름에 svcadm을 입력하고 검색을 누른다.

malloc_usable_size(3)

MALLOC_USABLE_SIZE(3)      Linux Programmer's Manual     MALLOC_USABLE_SIZE(3)



NAME
       malloc_usable_size - obtain size of block of memory allocated from heap

SYNOPSIS
       #include <malloc.h>

       size_t malloc_usable_size (void *ptr);

DESCRIPTION
       The malloc_usable_size() function returns the number of usable bytes in
       the block pointed to by ptr, a pointer to a block of  memory  allocated
       by malloc(3) or a related function.

RETURN VALUE
       malloc_usable_size() returns the number of usable bytes in the block of
       allocated memory pointed to by ptr.  If ptr is NULL, 0 is returned.

ATTRIBUTES
       For  an  explanation  of  the  terms  used   in   this   section,   see
       attributes(7).

       allbox;   lbw20  lb  lb  l  l  l.   Interface Attribute Value  T{  mal‐
       loc_usable_size() T}   Thread safety  MT-Safe

CONFORMING TO
       This function is a GNU extension.

NOTES
       The value returned by malloc_usable_size()  may  be  greater  than  the
       requested  size of the allocation because of alignment and minimum size
       constraints.  Although the excess  bytes  can  be  overwritten  by  the
       application without ill effects, this is not good programming practice:
       the number of excess bytes in an allocation depends on  the  underlying
       implementation.

       The main use of this function is for debugging and introspection.

SEE ALSO
       malloc(3)

COLOPHON
       This  page  is  part of release 5.02 of the Linux man-pages project.  A
       description of the project, information about reporting bugs,  and  the
       latest     version     of     this    page,    can    be    found    at
       https://www.kernel.org/doc/man-pages/.



GNU                               2017-09-15             MALLOC_USABLE_SIZE(3)