1  /* Copyright (C) 1991-2023 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 "libioP.h"
      19  #include "stdio.h"
      20  
      21  #undef _IO_putc
      22  
      23  int
      24  _IO_putc (int c, FILE *fp)
      25  {
      26    int result;
      27    CHECK_FILE (fp, EOF);
      28    if (!_IO_need_lock (fp))
      29      return _IO_putc_unlocked (c, fp);
      30    _IO_acquire_lock (fp);
      31    result = _IO_putc_unlocked (c, fp);
      32    _IO_release_lock (fp);
      33    return result;
      34  }
      35  libc_hidden_def (_IO_putc)
      36  
      37  #undef putc
      38  
      39  weak_alias (_IO_putc, putc)
      40  
      41  #ifndef _IO_MTSAFE_IO
      42  #undef putc_unlocked
      43  weak_alias (_IO_putc, putc_unlocked)
      44  #endif