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f7a9f785 | 1 | /* Copyright (C) 1991-2016 Free Software Foundation, Inc. |
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2 | This file is part of the GNU C Library. |
3 | ||
4 | The GNU C Library is free software; you can redistribute it and/or | |
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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. | |
478b92f0 UD |
8 | |
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 | |
41bdb6e2 | 12 | Lesser General Public License for more details. |
478b92f0 | 13 | |
41bdb6e2 | 14 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
15 | License along with the GNU C Library; if not, see |
16 | <http://www.gnu.org/licenses/>. */ | |
28f540f4 | 17 | |
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18 | #ifndef _MALLOC_INTERNAL |
19 | # define _MALLOC_INTERNAL | |
20 | # include <malloc.h> | |
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21 | #endif |
22 | ||
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23 | #ifndef __GNU_LIBRARY__ |
24 | # define __sbrk sbrk | |
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25 | #endif |
26 | ||
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. */ | |
54da5be3 | 30 | |
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31 | # include <stddef.h> |
32 | # include <stdlib.h> | |
a222d91a | 33 | extern void *__sbrk (ptrdiff_t increment) __THROW; |
602d9786 | 34 | libc_hidden_proto (__sbrk) |
28f540f4 RM |
35 | #endif |
36 | ||
37 | #ifndef NULL | |
6c8dbf00 | 38 | # define NULL 0 |
28f540f4 RM |
39 | #endif |
40 | ||
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. */ | |
a222d91a | 44 | void * |
5cc45e10 | 45 | __default_morecore (ptrdiff_t increment) |
28f540f4 | 46 | { |
a222d91a JM |
47 | void *result = (void *) __sbrk (increment); |
48 | if (result == (void *) -1) | |
28f540f4 | 49 | return NULL; |
6c8dbf00 | 50 | |
28f540f4 RM |
51 | return result; |
52 | } | |
cb09a2cd | 53 | libc_hidden_def (__default_morecore) |