1: /* Copyright (C) 1993, 1995, 1996, 1997, 1998, 2002, 2003
    2:    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, write to the Free
   17:    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   18:    02111-1307 USA.
   19: 
   20:    As a special exception, if you link the code in this file with
   21:    files compiled with a GNU compiler to produce an executable,
   22:    that does not cause the resulting executable to be covered by
   23:    the GNU Lesser General Public License.  This exception does not
   24:    however invalidate any other reasons why the executable file
   25:    might be covered by the GNU Lesser General Public License.
   26:    This exception applies to code released by its copyright holders
   27:    in files containing the exception.  */
   28: 
   29: #include "libioP.h"
   30: #include <stdio.h>
   31: 
   32: int
   33: _IO_fflush (fp)
   34:      _IO_FILE *fp;
   35: {
   36:   if (fp == NULL)
   37:     return INTUSE(_IO_flush_all) ();
   38:   else
   39:     {
   40:       int result;
   41:       CHECK_FILE (fp, EOF);
   42:       _IO_acquire_lock (fp);
   43:       result = _IO_SYNC (fp) ? EOF : 0;
   44:       _IO_release_lock (fp);
   45:       return result;
   46:     }
   47: }
   48: INTDEF(_IO_fflush)
   49: 
   50: #ifdef weak_alias
   51: weak_alias (_IO_fflush, fflush)
   52: 
   53: #ifndef _IO_MTSAFE_IO
   54: weak_alias (_IO_fflush, fflush_unlocked)
   55: libc_hidden_weak (fflush_unlocked)
   56: #endif
   57: #endif