1  /* Thread package specific definitions of stream lock type.  Generic version.
       2     Copyright (C) 2000-2023 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 */