1 /* Thread package specific definitions of stream lock type. Generic version. 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