libio/putc.c

   1 /* Copyright (C) 1991-2022 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