VLC  4.0.0-dev
vlc_xlib.h
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1 /*****************************************************************************
2  * vlc_xlib.h: initialization of Xlib
3  *****************************************************************************
4  * Copyright (C) 2010 RĂ©mi Denis-Courmont
5  *
6  * This program is free software; you can redistribute it and/or modify it
7  * under the terms of the GNU Lesser General Public License as published by
8  * the Free Software Foundation; either version 2.1 of the License, or
9  * (at your option) any later version.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14  * GNU Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public License
17  * along with this program; if not, write to the Free Software Foundation,
18  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
19  *****************************************************************************/
20 
21 #ifndef VLC_XLIB_H
22 # define VLC_XLIB_H 1
23 
24 # include <stdio.h>
25 # include <stdlib.h>
26 # include <X11/Xlib.h>
27 # include <X11/Xlibint.h>
28 
29 static inline bool vlc_xlib_init (vlc_object_t *obj)
30 {
31  if (!var_InheritBool (obj, "xlib"))
32  return false;
33 
34  bool ok = false;
35 
36  /* XInitThreads() can be called multiple times,
37  * but it is not reentrant, so we need this global lock. */
39 
40  if (_Xglobal_lock == NULL && unlikely(_XErrorFunction != NULL))
41  /* (_Xglobal_lock == NULL) => Xlib threads not initialized */
42  /* (_XErrorFunction != NULL) => Xlib already in use */
43  fprintf (stderr, "%s:%u:%s: Xlib not initialized for threads.\n"
44  "This process is probably using LibVLC incorrectly.\n"
45  "Pass \"--no-xlib\" to libvlc_new() to fix this.\n",
46  __FILE__, __LINE__, __func__);
47  else if (XInitThreads ())
48  ok = true;
49 
51 
52  if (!ok)
53  msg_Err (obj, "Xlib not initialized for threads");
54  return ok;
55 }
56 
57 #endif
static bool vlc_xlib_init(vlc_object_t *obj)
Definition: vlc_xlib.h:30
#define vlc_global_lock(n)
Acquires a global mutex.
Definition: vlc_threads.h:1126
Definition: vlc_threads.h:1106
#define vlc_global_unlock(n)
Releases a global mutex.
Definition: vlc_threads.h:1131
#define unlikely(p)
Predicted false condition.
Definition: vlc_common.h:223
static bool var_InheritBool(vlc_object_t *obj, const char *name)
Definition: vlc_variables.h:675
#define msg_Err(p_this,...)
Definition: vlc_messages.h:102
VLC object common members.
Definition: vlc_objects.h:43