eglglobals.c revision d63b28c1 
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 "eglglobals.h"
34#include "egldisplay.h"
35#include "egldriver.h"
36#include "eglmutex.h"
37
38
39static _EGLMutex _eglGlobalMutex = _EGL_MUTEX_INITIALIZER;
40
41struct _egl_global _eglGlobal =
42{
43   &_eglGlobalMutex,       /* Mutex */
44   NULL,                   /* DisplayList */
45   2,                      /* NumAtExitCalls */
46   {
47      /* default AtExitCalls, called in reverse order */
48      _eglUnloadDrivers, /* always called last */
49      _eglFiniDisplay
50   },
51
52   /* ClientExtensions */
53   {
54      true, /* EGL_EXT_client_extensions */
55      true, /* EGL_EXT_platform_base */
56      true, /* EGL_EXT_platform_x11 */
57      true, /* EGL_EXT_platform_wayland */
58      true  /* EGL_MESA_platform_gbm */
59   },
60
61   /* ClientExtensionsString */
62   "EGL_EXT_client_extensions"
63   " EGL_EXT_platform_base"
64   " EGL_EXT_platform_x11"
65   " EGL_EXT_platform_wayland"
66   " EGL_MESA_platform_gbm"
67};
68
69static EGLBoolean registered = EGL_FALSE;
70
71static void __attribute__((__destructor__))
72_eglAtExit(void)
73{
74   EGLint i;
75
76   if (!registered)
77     return;
78
79   for (i = _eglGlobal.NumAtExitCalls - 1; i >= 0; i--)
80      _eglGlobal.AtExitCalls[i]();
81}
82
83
84void
85_eglAddAtExitCall(void (*func)(void))
86{
87   if (func) {
88
89      _eglLockMutex(_eglGlobal.Mutex);
90
91      registered = EGL_TRUE;
92
93      assert(_eglGlobal.NumAtExitCalls < ARRAY_SIZE(_eglGlobal.AtExitCalls));
94      _eglGlobal.AtExitCalls[_eglGlobal.NumAtExitCalls++] = func;
95
96      _eglUnlockMutex(_eglGlobal.Mutex);
97   }
98}
99