1 /* Copyright (C) 1991-2019 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <http://www.gnu.org/licenses/>. */
18 #ifndef _MALLOC_INTERNAL
19 # define _MALLOC_INTERNAL
23 #ifndef __GNU_LIBRARY__
27 #ifdef __GNU_LIBRARY__
28 /* It is best not to declare this and cast its result on foreign operating
29 systems with potentially hostile include files. */
33 extern void *__sbrk (ptrdiff_t increment
) __THROW
;
34 libc_hidden_proto (__sbrk
)
41 /* Allocate INCREMENT more bytes of data space,
42 and return the start of data space, or NULL on errors.
43 If INCREMENT is negative, shrink data space. */
45 __default_morecore (ptrdiff_t increment
)
47 void *result
= (void *) __sbrk (increment
);
48 if (result
== (void *) -1)
53 libc_hidden_def (__default_morecore
)