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      1 /**************************************************************************
      2  *
      3  * Copyright 2008 VMware, Inc.
      4  * Copyright 2009-2010 Chia-I Wu <olvaffe (at) 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    /* 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 
     76 static void
     77 _eglAtExit(void)
     78 {
     79    EGLint i;
     80    for (i = _eglGlobal.NumAtExitCalls - 1; i >= 0; i--)
     81       _eglGlobal.AtExitCalls[i]();
     82 }
     83 
     84 
     85 void
     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