malloc: Preserve arena free list/thread count invariant [BZ #20370]
[glibc.git] / stdio-common / isoc99_scanf.c
blob51f6c3c1a14dda44980aa83aa7c7c9a453dc64a2
1 /* Copyright (C) 1991-2016 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <http://www.gnu.org/licenses/>. */
18 #include <stdarg.h>
19 #include <stdio.h>
20 #include <libioP.h>
23 /* Read formatted input from stdin according to the format string FORMAT. */
24 /* VARARGS1 */
25 int
26 __isoc99_scanf (const char *format, ...)
28 va_list arg;
29 int done;
31 #ifdef _IO_MTSAFE_IO
32 _IO_acquire_lock_clear_flags2 (stdin);
33 #endif
34 stdin->_flags2 |= _IO_FLAGS2_SCANF_STD;
36 va_start (arg, format);
37 done = _IO_vfscanf (stdin, format, arg, NULL);
38 va_end (arg);
40 #ifdef _IO_MTSAFE_IO
41 _IO_release_lock (stdin);
42 #endif
43 return done;