1/**************************************************************************
2 *
3 * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
4 * Copyright 2009-2010 Chia-I Wu <olvaffe@gmail.com>
5 * Copyright 2010-2011 LunarG, Inc.
6 * All Rights Reserved.
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the
10 * "Software"), to deal in the Software without restriction, including
11 * without limitation the rights to use, copy, modify, merge, publish,
12 * distribute, sub license, and/or sell copies of the Software, and to
13 * permit persons to whom the Software is furnished to do so, subject to
14 * the following conditions:
15 *
16 * The above copyright notice and this permission notice (including the
17 * next paragraph) shall be included in all copies or substantial portions
18 * of the Software.
19 *
20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
21 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
23 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
24 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
25 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
26 * DEALINGS IN THE SOFTWARE.
27 *
28 **************************************************************************/
29
30
31#include <stdlib.h>
32#include <assert.h>
33#include "eglglobals.h"
34#include "egldisplay.h"
35#include "egldriver.h"
36#include "eglmutex.h"
37
38
39static _EGL_DECLARE_MUTEX(_eglGlobalMutex);
40struct _egl_global _eglGlobal =
41{
42   &_eglGlobalMutex,       /* Mutex */
43   NULL,                   /* DisplayList */
44   2,                      /* NumAtExitCalls */
45   {
46      /* default AtExitCalls, called in reverse order */
47      _eglUnloadDrivers, /* always called last */
48      _eglFiniDisplay
49   },
50};
51
52
53static void
54_eglAtExit(void)
55{
56   EGLint i;
57   for (i = _eglGlobal.NumAtExitCalls - 1; i >= 0; i--)
58      _eglGlobal.AtExitCalls[i]();
59}
60
61
62void
63_eglAddAtExitCall(void (*func)(void))
64{
65   if (func) {
66      static EGLBoolean registered = EGL_FALSE;
67
68      _eglLockMutex(_eglGlobal.Mutex);
69
70      if (!registered) {
71         atexit(_eglAtExit);
72         registered = EGL_TRUE;
73      }
74
75      assert(_eglGlobal.NumAtExitCalls < ARRAY_SIZE(_eglGlobal.AtExitCalls));
76      _eglGlobal.AtExitCalls[_eglGlobal.NumAtExitCalls++] = func;
77
78      _eglUnlockMutex(_eglGlobal.Mutex);
79   }
80}
81