개요

• 솔라나라에 설명된 어플리케이션에 대해 맨 페이지를 찾아 출력한다.
• MAN 페이지에 대한 설명은 윈디하나의 솔라나라: MAN 페이지을 참고하자.
• svcadm(8)을 검색하려면 섹션에서 8 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  attrib‐
       utes(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 re‐
       quested size of the allocation because of alignment  and  minimum  size
       constraints.   Although  the excess bytes can be overwritten by the ap‐
       plication 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)