/usr/include/vlc/plugins/vlc_xlib.h is in libvlccore-dev 3.0.1-3build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* vlc_xlib.h: initialization of Xlib
*****************************************************************************
* Copyright (C) 2010 Rémi Denis-Courmont
*
* This program 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.
*
* This program 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 this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
#ifndef VLC_XLIB_H
# define VLC_XLIB_H 1
# include <stdio.h>
# include <stdlib.h>
# include <X11/Xlib.h>
# include <X11/Xlibint.h>
static inline bool vlc_xlib_init (vlc_object_t *obj)
{
if (!var_InheritBool (obj, "xlib"))
return false;
bool ok = false;
/* XInitThreads() can be called multiple times,
* but it is not reentrant, so we need this global lock. */
vlc_global_lock (VLC_XLIB_MUTEX);
if (_Xglobal_lock == NULL && unlikely(_XErrorFunction != NULL))
/* (_Xglobal_lock == NULL) => Xlib threads not initialized */
/* (_XErrorFunction != NULL) => Xlib already in use */
fprintf (stderr, "%s:%u:%s: Xlib not initialized for threads.\n"
"This process is probably using LibVLC incorrectly.\n"
"Pass \"--no-xlib\" to libvlc_new() to fix this.\n",
__FILE__, __LINE__, __func__);
else if (XInitThreads ())
ok = true;
vlc_global_unlock (VLC_XLIB_MUTEX);
if (!ok)
msg_Err (obj, "Xlib not initialized for threads");
return ok;
}
#endif
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