1  /* lockfile - Handle locking and unlocking of streams.  Hurd pthread 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  #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")));