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1 | /* Thread package specific definitions of stream lock type. Generic version. |
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2 | Copyright (C) 2000-2022 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 | #ifndef _STDIO_LOCK_H |
20 | #define _STDIO_LOCK_H 1 |
21 | |
22 | #include <libc-lock.h> |
23 | |
24 | __libc_lock_define_recursive (typedef, _IO_lock_t) |
25 | #define _IO_lock_t_defined 1 |
26 | |
27 | /* We need recursive (counting) mutexes. */ |
28 | #ifdef _LIBC_LOCK_RECURSIVE_INITIALIZER |
29 | # define _IO_lock_initializer _LIBC_LOCK_RECURSIVE_INITIALIZER |
30 | #elif _IO_MTSAFE_IO |
31 | #error libio needs recursive mutexes for _IO_MTSAFE_IO |
32 | #endif |
33 | |
34 | #define _IO_lock_init(_name) __libc_lock_init_recursive (_name) |
35 | #define _IO_lock_fini(_name) __libc_lock_fini_recursive (_name) |
36 | #define _IO_lock_lock(_name) __libc_lock_lock_recursive (_name) |
37 | #define _IO_lock_trylock(_name) __libc_lock_trylock_recursive (_name) |
38 | #define _IO_lock_unlock(_name) __libc_lock_unlock_recursive (_name) |
39 | |
40 | |
41 | #define _IO_cleanup_region_start(_fct, _fp) \ |
42 | __libc_cleanup_region_start (((_fp)->_flags & _IO_USER_LOCK) == 0, _fct, _fp) |
43 | #define _IO_cleanup_region_start_noarg(_fct) \ |
44 | __libc_cleanup_region_start (1, _fct, NULL) |
45 | #define _IO_cleanup_region_end(_doit) \ |
46 | __libc_cleanup_region_end (_doit) |
47 | |
48 | #if defined _LIBC && IS_IN (libc) |
49 | |
50 | # ifdef __EXCEPTIONS |
51 | # define _IO_acquire_lock(_fp) \ |
52 | do { \ |
53 | FILE *_IO_acquire_lock_file \ |
54 | __attribute__((cleanup (_IO_acquire_lock_fct))) \ |
55 | = (_fp); \ |
56 | _IO_flockfile (_IO_acquire_lock_file); |
57 | # else |
58 | # define _IO_acquire_lock(_fp) _IO_acquire_lock_needs_exceptions_enabled |
59 | # endif |
60 | # define _IO_release_lock(_fp) ; } while (0) |
61 | |
62 | #endif |
63 | |
64 | #endif /* stdio-lock.h */ |
65 |
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