src/egl/main/eglglobals.c

   1 #include <stdlib.h>
   2 #include <assert.h>
   3 #include "eglglobals.h"
   4 #include "egldisplay.h"
   5 #include "egldriver.h"
   6 #include "eglmutex.h"
   7
   8
   9 static _EGL_DECLARE_MUTEX(_eglGlobalMutex);
  10 struct _egl_global _eglGlobal =
  11 {
  12    &_eglGlobalMutex,       /* Mutex */
  13    NULL,                   /* DisplayList */
  14    1,                      /* FreeScreenHandle */
  15    2,                      /* NumAtExitCalls */
  16    {
  17       /* default AtExitCalls, called in reverse order */
  18       _eglUnloadDrivers, /* always called last */
  19       _eglFiniDisplay
  20    },
  21 };
  22
  23
  24 static void
  25 _eglAtExit(void)
  26 {
  27    EGLint i;
  28    for (i = _eglGlobal.NumAtExitCalls - 1; i >= 0; i--)
  29       _eglGlobal.AtExitCalls[i]();
  30 }
  31
  32
  33 void
  34 _eglAddAtExitCall(void (*func)(void))
  35 {
  36    if (func) {
  37       static EGLBoolean registered = EGL_FALSE;
  38
  39       _eglLockMutex(_eglGlobal.Mutex);
  40
  41       if (!registered) {
  42          atexit(_eglAtExit);
  43          registered = EGL_TRUE;
  44       }
  45
  46       assert(_eglGlobal.NumAtExitCalls < ARRAY_SIZE(_eglGlobal.AtExitCalls));
  47       _eglGlobal.AtExitCalls[_eglGlobal.NumAtExitCalls++] = func;
  48
  49       _eglUnlockMutex(_eglGlobal.Mutex);
  50    }
  51 }