1/* Memory handling for the scope data structures.
2 Copyright (C) 2009-2020 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <stdlib.h>
20#include <ldsodefs.h>
21#include <sysdep-cancel.h>
22
23
24int
25_dl_scope_free (void *old)
26{
27 struct dl_scope_free_list *fsl;
28#define DL_SCOPE_FREE_LIST_SIZE (sizeof (fsl->list) / sizeof (fsl->list[0]))
29
30 if (RTLD_SINGLE_THREAD_P)
31 free (old);
32 else if ((fsl = GL(dl_scope_free_list)) == NULL)
33 {
34 GL(dl_scope_free_list) = fsl = malloc (sizeof (*fsl));
35 if (fsl == NULL)
36 {
37 THREAD_GSCOPE_WAIT ();
38 free (old);
39 return 1;
40 }
41 else
42 {
43 fsl->list[0] = old;
44 fsl->count = 1;
45 }
46 }
47 else if (fsl->count < DL_SCOPE_FREE_LIST_SIZE)
48 fsl->list[fsl->count++] = old;
49 else
50 {
51 THREAD_GSCOPE_WAIT ();
52 while (fsl->count > 0)
53 free (fsl->list[--fsl->count]);
54 return 1;
55 }
56 return 0;
57}
58