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-'\" t
-.\" Copyright (c) 2012 by Michael Kerrisk <mtk.manpages@gmail.com>
-.\"
-.\" SPDX-License-Identifier: Linux-man-pages-copyleft
-.\"
-.TH malloc_trim 3 (date) "Linux man-pages (unreleased)"
-.SH NAME
-malloc_trim \- release free memory from the heap
-.SH LIBRARY
-Standard C library
-.RI ( libc ", " \-lc )
-.SH SYNOPSIS
-.nf
-.B #include <malloc.h>
-.P
-.BI "int malloc_trim(size_t "  pad );
-.fi
-.SH DESCRIPTION
-The
-.BR malloc_trim ()
-function attempts to release free memory from the heap
-(by calling
-.BR sbrk (2)
-or
-.BR madvise (2)
-with suitable arguments).
-.P
-The
-.I pad
-argument specifies the amount of free space to leave untrimmed
-at the top of the heap.
-If this argument is 0, only the minimum amount of memory is maintained
-at the top of the heap (i.e., one page or less).
-A nonzero argument can be used to maintain some trailing space
-at the top of the heap in order to allow future allocations
-to be made without having to extend the heap with
-.BR sbrk (2).
-.SH RETURN VALUE
-The
-.BR malloc_trim ()
-function returns 1 if memory was actually released back to the system,
-or 0 if it was not possible to release any memory.
-.SH ERRORS
-No errors are defined.
-.SH ATTRIBUTES
-For an explanation of the terms used in this section, see
-.BR attributes (7).
-.TS
-allbox;
-lbx lb lb
-l l l.
-Interface	Attribute	Value
-T{
-.na
-.nh
-.BR malloc_trim ()
-T}	Thread safety	MT-Safe
-.TE
-.SH STANDARDS
-GNU.
-.SH VERSIONS
-glibc 2.0.
-.SH NOTES
-Only the main heap (using
-.BR sbrk (2))
-honors the
-.I pad
-argument; thread heaps do not.
-.P
-Since glibc 2.8 this function frees memory in all arenas and in all
-chunks with whole free pages.
-.\" See commit 68631c8eb92ff38d9da1ae34f6aa048539b199cc
-.\" (dated 2007-12-16) which adds iteration over all
-.\" arenas and frees all pages in chunks which are free.
-.P
-Before glibc 2.8 this function only freed memory at the
-top of the heap in the main arena.
-.SH SEE ALSO
-.BR sbrk (2),
-.BR malloc (3),
-.BR mallopt (3)