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1 /* lockfile - Handle locking and unlocking of streams. Hurd pthread version.
2 Copyright (C) 2000-2021 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 <pthread.h> /* Must come before <stdio.h>! */
20 #include <stdio.h>
21
22 void
23 _cthreads_flockfile (FILE *fp)
24 {
25 _IO_lock_lock (*fp->_lock);
26 }
27
28 void
29 _cthreads_funlockfile (FILE *fp)
30 {
31 _IO_lock_unlock (*fp->_lock);
32 }
33
34 int
35 _cthreads_ftrylockfile (FILE *fp)
36 {
37 return __libc_lock_trylock_recursive (*fp->_lock);
38 }
39
40 #undef _IO_flockfile
41 #undef _IO_funlockfile
42 #undef _IO_ftrylockfile
43 #undef flockfile
44 #undef funlockfile
45 #undef ftrylockfile
46
47 void _IO_flockfile (FILE *)
48 __attribute__ ((alias ("_cthreads_flockfile")));
49 void _IO_funlockfile (FILE *)
50 __attribute__ ((alias ("_cthreads_funlockfile")));
51 int _IO_ftrylockfile (FILE *)
52 __attribute__ ((alias ("_cthreads_ftrylockfile")));
53
54 void flockfile (FILE *)
55 __attribute__ ((weak, alias ("_cthreads_flockfile")));
56 void funlockfile (FILE *)
57 __attribute__ ((weak, alias ("_cthreads_funlockfile")));
58 int ftrylockfile (FILE *)
59 __attribute__ ((weak, alias ("_cthreads_ftrylockfile")));