mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-17 18:40:14 +00:00
43 lines
1.4 KiB
C
43 lines
1.4 KiB
C
/* Copyright (C) 1991, 1994, 1995 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Library General Public License as
|
|
published by the Free Software Foundation; either version 2 of the
|
|
License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If
|
|
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
|
|
Cambridge, MA 02139, USA. */
|
|
|
|
#include <ansidecl.h>
|
|
#include <errno.h>
|
|
#include <hurd.h>
|
|
|
|
/* Extend the process's data space by INCREMENT.
|
|
If INCREMENT is negative, shrink data space by - INCREMENT.
|
|
Return the address of the start of the new data space, or -1 for errors. */
|
|
PTR
|
|
DEFUN(__sbrk, (increment), int increment)
|
|
{
|
|
PTR result;
|
|
|
|
HURD_CRITICAL_BEGIN;
|
|
__mutex_lock (&_hurd_brk_lock);
|
|
result = (PTR) _hurd_brk;
|
|
if (increment != 0 && _hurd_set_brk (_hurd_brk + increment) < 0)
|
|
result = (PTR) -1;
|
|
__mutex_unlock (&_hurd_brk_lock);
|
|
HURD_CRITICAL_END;
|
|
|
|
return result;
|
|
}
|
|
|
|
weak_alias (__sbrk, sbrk)
|