60 lines
2.3 KiB
C
60 lines
2.3 KiB
C
|
/* Lock I/O stream. Singlethreaded version.
|
||
|
|
Copyright (C) 1996-2022 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
|
||
|
|
modify it under the terms of the GNU Lesser General Public
|
||
|
|
License as published by the Free Software Foundation; either
|
||
|
|
version 2.1 of the License, or (at your option) any later version.
|
||
|
|
|
||
|
|
The GNU C 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
|
||
|
|
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, see
|
||
|
|
<https://www.gnu.org/licenses/>. */
|
||
|
|
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <stdio-lock.h>
|
||
|
|
|
||
|
|
void
|
||
|
|
__flockfile (FILE *stream)
|
||
|
|
{
|
||
|
|
stream->_flags2 |= _IO_FLAGS2_NEED_LOCK;
|
||
|
|
_IO_lock_lock (*stream->_lock);
|
||
|
|
}
|
||
|
|
|
||
|
|
#if ! (defined __e2k__ && defined SHARED)
|
||
|
|
|
||
|
|
weak_alias (__flockfile, flockfile);
|
||
|
|
weak_alias (__flockfile, _IO_flockfile)
|
||
|
|
|
||
|
|
#else /* defined __e2k__ && defined SHARED */
|
||
|
|
|
||
|
|
weak_alias (__flockfile, __flockfile_weak)
|
||
|
|
|
||
|
|
# include <shlib-compat.h>
|
||
|
|
|
||
|
|
/* These symbols were also present in libc-2.29.so. Note that they don't
|
||
|
|
take care of preserving the original non-WEAKness of _IO_-symbol it
|
||
|
|
used to have (see `weak_alias ()'es above). See also below. */
|
||
|
|
versioned_symbol (libc, __flockfile_weak, flockfile, GLIBC_2_0);
|
||
|
|
versioned_symbol (libc, __flockfile_weak, _IO_flockfile, GLIBC_2_0);
|
||
|
|
|
||
|
|
/* For the sake of runtime compatibility with libpthread-2.29.so. Note that
|
||
|
|
_IO_flockfile@@GLIBC_2.0 used to be created as strong_alias () in it
|
||
|
|
which was "accidentally" changed when getting rid of the implementation in
|
||
|
|
sysdeps/pthread. */
|
||
|
|
compat_symbol (libpthread, __flockfile_weak, flockfile, GLIBC_2_0);
|
||
|
|
|
||
|
|
/* This extra strong_alias () is required because `__f{,un}lockfile ()'s turn
|
||
|
|
out to be HIDDEN unlike `__ftrylockfile ()' (???!!!) and the created dynamic
|
||
|
|
symbol should not inherit this inappropriate visibility which is sure to
|
||
|
|
eventually make it LOCAL. */
|
||
|
|
strong_alias (__flockfile, __flockfile_strong)
|
||
|
|
compat_symbol (libpthread, __flockfile_strong, _IO_flockfile, GLIBC_2_0);
|
||
|
|
|
||
|
|
#endif /* defined __e2k__ && defined SHARED */
|