1/* Try locking I/O stream. Singlethreaded version.
2 Copyright (C) 1996-2022 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 <stdio.h>
20#include <stdio-lock.h>
21#include <sys/single_threaded.h>
22
23int
24__ftrylockfile (FILE *stream)
25{
26 return _IO_lock_trylock (*stream->_lock);
27}
28weak_alias (__ftrylockfile, ftrylockfile);
29weak_alias (__ftrylockfile, _IO_ftrylockfile)
30

source code of glibc/stdio-common/ftrylockfile.c