mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-26 15:00:06 +00:00
43 lines
1.3 KiB
C
43 lines
1.3 KiB
C
/* Copyright (C) 1991, 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 General Public License as published by
|
|
the Free Software Foundation; either version 2, 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 General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with the GNU C Library; see the file COPYING. If not, write to
|
|
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
|
|
|
|
#include <ansidecl.h>
|
|
|
|
/* Defined in brk.c. */
|
|
extern PTR __curbrk;
|
|
extern int EXFUN(__brk, (PTR addr));
|
|
|
|
/* Extend the process's data space by INCREMENT.
|
|
If INCREMENT is negative, shrink data space by - INCREMENT.
|
|
Return start of new space allocated, or -1 for errors. */
|
|
PTR
|
|
DEFUN(__sbrk, (increment), int increment)
|
|
{
|
|
char *oldbrk;
|
|
|
|
if (increment == 0)
|
|
return __curbrk;
|
|
|
|
oldbrk = __curbrk;
|
|
if (__brk(oldbrk + increment) < 0)
|
|
return (PTR) -1;
|
|
|
|
return oldbrk;
|
|
}
|
|
|
|
weak_alias (__sbrk, sbrk)
|