1 /*
2 * Copyright (c) 2012, 2013 ARM Ltd
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. The name of the company may not be used to endorse or promote
14 * products derived from this software without specific prior written
15 * permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY ARM LTD ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL ARM LTD BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
22 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
23 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
24 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
25 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
26 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include "nano-malloc.h"
30
31 struct mallinfo
mallinfo(void)32 mallinfo(void)
33 {
34 char * sbrk_now;
35 chunk_t *pf;
36 size_t free_size = 0;
37 size_t total_size;
38 size_t ordblks = 0;
39 struct mallinfo current_mallinfo = {};
40
41 MALLOC_LOCK;
42
43 if (__malloc_sbrk_start == NULL) total_size = 0;
44 else {
45 sbrk_now = __malloc_sbrk_top;
46
47 if (sbrk_now == NULL)
48 total_size = (size_t)-1;
49 else
50 total_size = (size_t) (sbrk_now - __malloc_sbrk_start);
51 }
52
53 for (pf = __malloc_free_list; pf; pf = pf->next) {
54 ordblks++;
55 free_size += _size(pf);
56 }
57
58 current_mallinfo.ordblks = ordblks;
59 current_mallinfo.arena = total_size;
60 current_mallinfo.fordblks = free_size;
61 current_mallinfo.uordblks = total_size - free_size;
62
63 MALLOC_UNLOCK;
64
65 return current_mallinfo;
66 }
67
