summaryrefslogtreecommitdiffstats
path: root/gl/free.c
diff options
context:
space:
mode:
authorRincewindsHat <12514511+RincewindsHat@users.noreply.github.com>2021-11-17 01:05:54 +0100
committerRincewindsHat <12514511+RincewindsHat@users.noreply.github.com>2022-07-24 19:35:11 +0200
commita405fc138596f552581d2011fd6de02d5c8186c4 (patch)
tree4c084700b5cb5e9fcedf982a2d921bbc41d9935a /gl/free.c
parent9f2a9ca3d72023ff9b5707d1872c54d65edc9017 (diff)
downloadmonitoring-plugins-a405fc138596f552581d2011fd6de02d5c8186c4.tar.gz
Sync with the latest Gnulib code (1a268176f)
Diffstat (limited to 'gl/free.c')
-rw-r--r--gl/free.c53
1 files changed, 53 insertions, 0 deletions
diff --git a/gl/free.c b/gl/free.c
new file mode 100644
index 00000000..780f03dd
--- /dev/null
+++ b/gl/free.c
@@ -0,0 +1,53 @@
1/* Make free() preserve errno.
2
3 Copyright (C) 2003, 2006, 2009-2021 Free Software Foundation, Inc.
4
5 This file is free software: you can redistribute it and/or modify
6 it under the terms of the GNU Lesser General Public License as
7 published by the Free Software Foundation; either version 2.1 of the
8 License, or (at your option) any later version.
9
10 This file 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
13 GNU Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public License
16 along with this program. If not, see <https://www.gnu.org/licenses/>. */
17
18/* written by Paul Eggert */
19
20#include <config.h>
21
22/* Specification. */
23#include <stdlib.h>
24
25/* A function definition is only needed if HAVE_FREE_POSIX is not defined. */
26#if !HAVE_FREE_POSIX
27
28# include <errno.h>
29
30void
31rpl_free (void *p)
32# undef free
33{
34# if defined __GNUC__ && !defined __clang__
35 /* An invalid GCC optimization
36 <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98396>
37 would optimize away the assignments in the code below, when link-time
38 optimization (LTO) is enabled. Make the code more complicated, so that
39 GCC does not grok how to optimize it. */
40 int err[2];
41 err[0] = errno;
42 err[1] = errno;
43 errno = 0;
44 free (p);
45 errno = err[errno == 0];
46# else
47 int err = errno;
48 free (p);
49 errno = err;
50# endif
51}
52
53#endif