initial import

1 files changed, 42 insertions, 0 deletions

diff --git a/sysdeps/mach/hurd/sbrk.c b/sysdeps/mach/hurd/sbrk.c
new file mode 100644
index 0000000000..855cab8a60
--- /dev/null
+++ b/sysdeps/mach/hurd/sbrk.c
@@ -0,0 +1,42 @@
+/* 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)