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 23 int __ftrylockfile(FILE * stream)24__ftrylockfile (FILE *stream) 25 { 26 return _IO_lock_trylock (*stream->_lock); 27 } 28 weak_alias (__ftrylockfile, ftrylockfile); 29 weak_alias (__ftrylockfile, _IO_ftrylockfile) 30