mirror of
https://sourceware.org/git/glibc.git
synced 2025-10-27 12:15:39 +03:00
42 lines
1.4 KiB
C
42 lines
1.4 KiB
C
/* Copyright (C) 1991,94,95,97,98,2000,02 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 Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 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
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <errno.h>
|
|
#include <hurd.h>
|
|
#include <unistd.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. */
|
|
void *
|
|
__sbrk (intptr_t increment)
|
|
{
|
|
void *result;
|
|
|
|
HURD_CRITICAL_BEGIN;
|
|
__mutex_lock (&_hurd_brk_lock);
|
|
result = (void *) _hurd_brk;
|
|
if (increment != 0 && _hurd_set_brk (_hurd_brk + increment) < 0)
|
|
result = (void *) -1;
|
|
__mutex_unlock (&_hurd_brk_lock);
|
|
HURD_CRITICAL_END;
|
|
|
|
return result;
|
|
}
|
|
libc_hidden_def (__sbrk)
|
|
weak_alias (__sbrk, sbrk)
|