1/**************************************************************************
2 *
3 * Copyright 2008 VMware, Inc.
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 "c11/threads.h"
34
35#include "eglglobals.h"
36#include "egldisplay.h"
37#include "egldriver.h"
38
39
40static mtx_t _eglGlobalMutex = _MTX_INITIALIZER_NP;
41
42struct _egl_global _eglGlobal =
43{
44   &_eglGlobalMutex,       /* Mutex */
45   NULL,                   /* DisplayList */
46   2,                      /* NumAtExitCalls */
47   {
48      /* default AtExitCalls, called in reverse order */
49      _eglUnloadDrivers, /* always called last */
50      _eglFiniDisplay
51   },
52
53   /* ClientExtensionString */
54   "EGL_EXT_client_extensions"
55   " EGL_EXT_platform_base"
56#ifdef HAVE_WAYLAND_PLATFORM
57   " EGL_EXT_platform_wayland"
58#endif
59#ifdef HAVE_X11_PLATFORM
60   " EGL_EXT_platform_x11"
61#endif
62#ifdef HAVE_DRM_PLATFORM
63   " EGL_MESA_platform_gbm"
64#endif
65#ifdef HAVE_SURFACELESS_PLATFORM
66   " EGL_MESA_platform_surfaceless"
67#endif
68   " EGL_KHR_client_get_all_proc_addresses"
69   " EGL_KHR_debug",
70
71   NULL, /* debugCallback */
72   _EGL_DEBUG_BIT_CRITICAL | _EGL_DEBUG_BIT_ERROR, /* debugTypesEnabled */
73};
74
75
76static void
77_eglAtExit(void)
78{
79   EGLint i;
80   for (i = _eglGlobal.NumAtExitCalls - 1; i >= 0; i--)
81      _eglGlobal.AtExitCalls[i]();
82}
83
84
85void
86_eglAddAtExitCall(void (*func)(void))
87{
88   if (func) {
89      static EGLBoolean registered = EGL_FALSE;
90
91      mtx_lock(_eglGlobal.Mutex);
92
93      if (!registered) {
94         atexit(_eglAtExit);
95         registered = EGL_TRUE;
96      }
97
98      assert(_eglGlobal.NumAtExitCalls < ARRAY_SIZE(_eglGlobal.AtExitCalls));
99      _eglGlobal.AtExitCalls[_eglGlobal.NumAtExitCalls++] = func;
100
101      mtx_unlock(_eglGlobal.Mutex);
102   }
103}
104