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glibc  2.9
iofflush.c
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00001 /* Copyright (C) 1993, 1995, 1996, 1997, 1998, 2002, 2003
00002    Free Software Foundation, Inc.
00003    This file is part of the GNU C Library.
00004 
00005    The GNU C Library is free software; you can redistribute it and/or
00006    modify it under the terms of the GNU Lesser General Public
00007    License as published by the Free Software Foundation; either
00008    version 2.1 of the License, or (at your option) any later version.
00009 
00010    The GNU C Library is distributed in the hope that it will be useful,
00011    but WITHOUT ANY WARRANTY; without even the implied warranty of
00012    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013    Lesser General Public License for more details.
00014 
00015    You should have received a copy of the GNU Lesser General Public
00016    License along with the GNU C Library; if not, write to the Free
00017    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00018    02111-1307 USA.
00019 
00020    As a special exception, if you link the code in this file with
00021    files compiled with a GNU compiler to produce an executable,
00022    that does not cause the resulting executable to be covered by
00023    the GNU Lesser General Public License.  This exception does not
00024    however invalidate any other reasons why the executable file
00025    might be covered by the GNU Lesser General Public License.
00026    This exception applies to code released by its copyright holders
00027    in files containing the exception.  */
00028 
00029 #include "libioP.h"
00030 #include <stdio.h>
00031 
00032 int
00033 _IO_fflush (fp)
00034      _IO_FILE *fp;
00035 {
00036   if (fp == NULL)
00037     return INTUSE(_IO_flush_all) ();
00038   else
00039     {
00040       int result;
00041       CHECK_FILE (fp, EOF);
00042       _IO_acquire_lock (fp);
00043       result = _IO_SYNC (fp) ? EOF : 0;
00044       _IO_release_lock (fp);
00045       return result;
00046     }
00047 }
00048 INTDEF(_IO_fflush)
00049 
00050 #ifdef weak_alias
00051 weak_alias (_IO_fflush, fflush)
00052 
00053 #ifndef _IO_MTSAFE_IO
00054 weak_alias (_IO_fflush, fflush_unlocked)
00055 libc_hidden_weak (fflush_unlocked)
00056 #endif
00057 #endif