aboutsummaryrefslogtreecommitdiff
path: root/libio/__fsetlocking.c
diff options
context:
space:
mode:
Diffstat (limited to 'libio/__fsetlocking.c')
-rw-r--r--libio/__fsetlocking.c42
1 files changed, 42 insertions, 0 deletions
diff --git a/libio/__fsetlocking.c b/libio/__fsetlocking.c
new file mode 100644
index 0000000000..d5d94e04ba
--- /dev/null
+++ b/libio/__fsetlocking.c
@@ -0,0 +1,42 @@
+/* Copyright (C) 2000 Free Software Foundation, Inc.
+ This file is part of the GNU IO Library.
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License as
+ published by the Free Software Foundation; either version 2, or (at
+ your option) any later version.
+
+ This library is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this library; see the file COPYING. If not, write to
+ the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
+ MA 02111-1307, USA.
+
+ As a special exception, if you link this library with files
+ compiled with a GNU compiler to produce an executable, this does
+ not cause the resulting executable to be covered by the GNU General
+ Public License. This exception does not however invalidate any
+ other reasons why the executable file might be covered by the GNU
+ General Public License. */
+
+#include <stdio_ext.h>
+
+int
+__fsetlocking (FILE *fp, int type)
+{
+ int result = ((fp->_flags & _IO_USER_LOCK)
+ ? FSETLOCKING_BYCALLER : FSETLOCKING_INTERNAL);
+
+ if (type != FSETLOCKING_QUERY)
+ {
+ fp->_flags &= ~_IO_USER_LOCK;
+ if (type == FSETLOCKING_BYCALLER)
+ fp->_flags |= _IO_USER_LOCK;
+ }
+
+ return result;
+}