| xf.li | bdd93d5 | 2023-05-12 07:10:14 -0700 | [diff] [blame] | 1 | /* Thread package specific definitions of stream lock type. Generic version. |
| 2 | Copyright (C) 2000-2016 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 | <http://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 | |
| 26 | /* We need recursive (counting) mutexes. */ |
| 27 | #ifdef _LIBC_LOCK_RECURSIVE_INITIALIZER |
| 28 | # define _IO_lock_initializer _LIBC_LOCK_RECURSIVE_INITIALIZER |
| 29 | #elif _IO_MTSAFE_IO |
| 30 | #error libio needs recursive mutexes for _IO_MTSAFE_IO |
| 31 | #endif |
| 32 | |
| 33 | #define _IO_lock_init(_name) __libc_lock_init_recursive (_name) |
| 34 | #define _IO_lock_fini(_name) __libc_lock_fini_recursive (_name) |
| 35 | #define _IO_lock_lock(_name) __libc_lock_lock_recursive (_name) |
| 36 | #define _IO_lock_trylock(_name) __libc_lock_trylock_recursive (_name) |
| 37 | #define _IO_lock_unlock(_name) __libc_lock_unlock_recursive (_name) |
| 38 | |
| 39 | |
| 40 | #define _IO_cleanup_region_start(_fct, _fp) \ |
| 41 | __libc_cleanup_region_start (((_fp)->_flags & _IO_USER_LOCK) == 0, _fct, _fp) |
| 42 | #define _IO_cleanup_region_start_noarg(_fct) \ |
| 43 | __libc_cleanup_region_start (1, _fct, NULL) |
| 44 | #define _IO_cleanup_region_end(_doit) \ |
| 45 | __libc_cleanup_region_end (_doit) |
| 46 | |
| 47 | #if defined _LIBC && IS_IN (libc) |
| 48 | |
| 49 | # ifdef __EXCEPTIONS |
| 50 | # define _IO_acquire_lock(_fp) \ |
| 51 | do { \ |
| 52 | _IO_FILE *_IO_acquire_lock_file \ |
| 53 | __attribute__((cleanup (_IO_acquire_lock_fct))) \ |
| 54 | = (_fp); \ |
| 55 | _IO_flockfile (_IO_acquire_lock_file); |
| 56 | # define _IO_acquire_lock_clear_flags2(_fp) \ |
| 57 | do { \ |
| 58 | _IO_FILE *_IO_acquire_lock_file \ |
| 59 | __attribute__((cleanup (_IO_acquire_lock_clear_flags2_fct))) \ |
| 60 | = (_fp); \ |
| 61 | _IO_flockfile (_IO_acquire_lock_file); |
| 62 | # else |
| 63 | # define _IO_acquire_lock(_fp) _IO_acquire_lock_needs_exceptions_enabled |
| 64 | # define _IO_acquire_lock_clear_flags2(_fp) _IO_acquire_lock (_fp) |
| 65 | # endif |
| 66 | # define _IO_release_lock(_fp) ; } while (0) |
| 67 | |
| 68 | #endif |
| 69 | |
| 70 | #endif /* stdio-lock.h */ |