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 "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 }