1  /* Copyright (C) 2000-2023 Free Software Foundation, Inc.
       2     This file is part of the GNU C Library.
       3  
       4     The GNU C Library is free software; you can redistribute it and/or
       5     modify it under the terms of the GNU Lesser General Public
       6     License as published by the Free Software Foundation; either
       7     version 2.1 of the License, or (at your option) any later version.
       8  
       9     The GNU C Library is distributed in the hope that it will be useful,
      10     but WITHOUT ANY WARRANTY; without even the implied warranty of
      11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      12     Lesser General Public License for more details.
      13  
      14     You should have received a copy of the GNU Lesser General Public
      15     License along with the GNU C Library; if not, see
      16     <https://www.gnu.org/licenses/>.  */
      17  
      18  #include <stdio_ext.h>
      19  
      20  #undef __fsetlocking
      21  
      22  int
      23  __fsetlocking (FILE *fp, int type)
      24  {
      25    int result = ((fp->_flags & _IO_USER_LOCK)
      26  		? FSETLOCKING_BYCALLER : FSETLOCKING_INTERNAL);
      27  
      28    if (type != FSETLOCKING_QUERY)
      29      {
      30        fp->_flags &= ~_IO_USER_LOCK;
      31        if (type == FSETLOCKING_BYCALLER)
      32  	 fp->_flags |= _IO_USER_LOCK;
      33      }
      34  
      35    return result;
      36  }
      37  libc_hidden_def (__fsetlocking)