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glibc  2.9
__fsetlocking.c
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00001 /* Copyright (C) 2000, 2002 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003 
00004    The GNU C Library is free software; you can redistribute it and/or
00005    modify it under the terms of the GNU Lesser General Public
00006    License as published by the Free Software Foundation; either
00007    version 2.1 of the License, or (at your option) any later version.
00008 
00009    The GNU C Library is distributed in the hope that it will be useful,
00010    but WITHOUT ANY WARRANTY; without even the implied warranty of
00011    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012    Lesser General Public License for more details.
00013 
00014    You should have received a copy of the GNU Lesser General Public
00015    License along with the GNU C Library; if not, write to the Free
00016    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00017    02111-1307 USA.  */
00018 
00019 #include <stdio_ext.h>
00020 
00021 #undef __fsetlocking
00022 
00023 int
00024 __fsetlocking (FILE *fp, int type)
00025 {
00026   int result = ((fp->_flags & _IO_USER_LOCK)
00027               ? FSETLOCKING_BYCALLER : FSETLOCKING_INTERNAL);
00028 
00029   if (type != FSETLOCKING_QUERY)
00030     {
00031       fp->_flags &= ~_IO_USER_LOCK;
00032       if (type == FSETLOCKING_BYCALLER)
00033         fp->_flags |= _IO_USER_LOCK;
00034     }
00035 
00036   return result;
00037 }
00038 INTDEF(__fsetlocking)