src/egl/main/eglglobals.c

   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
  39 static _EGLMutex _eglGlobalMutex = _EGL_MUTEX_INITIALIZER;
  40
  41 struct _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
  69
  70 static void
  71 _eglAtExit(void)
  72 {
  73    EGLint i;
  74    for (i = _eglGlobal.NumAtExitCalls - 1; i >= 0; i--)
  75       _eglGlobal.AtExitCalls[i]();
  76 }
  77
  78
  79 void
  80 _eglAddAtExitCall(void (*func)(void))
  81 {
  82    if (func) {
  83       static EGLBoolean registered = EGL_FALSE;
  84
  85       _eglLockMutex(_eglGlobal.Mutex);
  86
  87       if (!registered) {
  88          atexit(_eglAtExit);
  89          registered = EGL_TRUE;
  90       }
  91
  92       assert(_eglGlobal.NumAtExitCalls < ARRAY_SIZE(_eglGlobal.AtExitCalls));
  93       _eglGlobal.AtExitCalls[_eglGlobal.NumAtExitCalls++] = func;
  94
  95       _eglUnlockMutex(_eglGlobal.Mutex);
  96    }
  97 }