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  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.  
  40. static mtx_t _eglGlobalMutex = _MTX_INITIALIZER_NP;
  41.  
  42. struct _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.    /* ClientExtensions */
  54.    {
  55.       true, /* EGL_EXT_client_extensions */
  56.       true, /* EGL_EXT_platform_base */
  57.       true, /* EGL_EXT_platform_x11 */
  58.       true, /* EGL_EXT_platform_wayland */
  59.       true, /* EGL_MESA_platform_gbm */
  60.       true, /* EGL_KHR_client_get_all_proc_addresses */
  61.    },
  62.  
  63.    /* ClientExtensionsString */
  64.    "EGL_EXT_client_extensions"
  65.    " EGL_EXT_platform_base"
  66.    " EGL_EXT_platform_x11"
  67.    " EGL_EXT_platform_wayland"
  68.    " EGL_MESA_platform_gbm"
  69.    " EGL_KHR_client_get_all_proc_addresses"
  70. };
  71.  
  72.  
  73. static void
  74. _eglAtExit(void)
  75. {
  76.    EGLint i;
  77.    for (i = _eglGlobal.NumAtExitCalls - 1; i >= 0; i--)
  78.       _eglGlobal.AtExitCalls[i]();
  79. }
  80.  
  81.  
  82. void
  83. _eglAddAtExitCall(void (*func)(void))
  84. {
  85.    if (func) {
  86.       static EGLBoolean registered = EGL_FALSE;
  87.  
  88.       mtx_lock(_eglGlobal.Mutex);
  89.  
  90.       if (!registered) {
  91.          atexit(_eglAtExit);
  92.          registered = EGL_TRUE;
  93.       }
  94.  
  95.       assert(_eglGlobal.NumAtExitCalls < ARRAY_SIZE(_eglGlobal.AtExitCalls));
  96.       _eglGlobal.AtExitCalls[_eglGlobal.NumAtExitCalls++] = func;
  97.  
  98.       mtx_unlock(_eglGlobal.Mutex);
  99.    }
  100. }
  101.