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1 | /* Copyright (C) 2000 Free Software Foundation, Inc. |
2 | This file is part of the GNU IO Library. | |
3 | ||
4 | This library is free software; you can redistribute it and/or | |
5 | modify it under the terms of the GNU General Public License as | |
6 | published by the Free Software Foundation; either version 2, or (at | |
7 | your option) any later version. | |
8 | ||
9 | This library is distributed in the hope that it will be useful, but | |
10 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU General Public License | |
15 | along with this library; see the file COPYING. If not, write to | |
16 | the Free Software Foundation, 59 Temple Place - Suite 330, Boston, | |
17 | MA 02111-1307, USA. | |
18 | ||
19 | As a special exception, if you link this library with files | |
20 | compiled with a GNU compiler to produce an executable, this does | |
21 | not cause the resulting executable to be covered by the GNU General | |
22 | Public License. This exception does not however invalidate any | |
23 | other reasons why the executable file might be covered by the GNU | |
24 | General Public License. */ | |
25 | ||
26 | #include <stdio_ext.h> | |
27 | ||
28 | int | |
29 | __fsetlocking (FILE *fp, int type) | |
30 | { | |
31 | int result = ((fp->_flags & _IO_USER_LOCK) | |
32 | ? FSETLOCKING_BYCALLER : FSETLOCKING_INTERNAL); | |
33 | ||
34 | if (type != FSETLOCKING_QUERY) | |
35 | { | |
36 | fp->_flags &= ~_IO_USER_LOCK; | |
37 | if (type == FSETLOCKING_BYCALLER) | |
38 | fp->_flags |= _IO_USER_LOCK; | |
39 | } | |
40 | ||
41 | return result; | |
42 | } |