-/* Copyright (C) 1993,1996,1997,1998,2002 Free Software Foundation, Inc.
+/* Copyright (C) 1993-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA.
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>.
As a special exception, if you link the code in this file with
files compiled with a GNU compiler to produce an executable,
#include "libioP.h"
int
-_IO_ungetc (c, fp)
- int c;
- _IO_FILE *fp;
+_IO_ungetc (int c, FILE *fp)
{
int result;
CHECK_FILE (fp, EOF);
if (c == EOF)
return EOF;
- _IO_cleanup_region_start ((void (*) __P ((void *))) _IO_funlockfile, fp);
- _IO_flockfile (fp);
- result = INTUSE(_IO_sputbackc) (fp, (unsigned char) c);
- _IO_funlockfile (fp);
- _IO_cleanup_region_end (0);
+ if (!_IO_need_lock (fp))
+ return _IO_sputbackc (fp, (unsigned char) c);
+ _IO_acquire_lock (fp);
+ result = _IO_sputbackc (fp, (unsigned char) c);
+ _IO_release_lock (fp);
return result;
}
-#ifdef weak_alias
weak_alias (_IO_ungetc, ungetc)
-#endif