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    2,                      /* NumAtExitCalls */
  15    {
  16       /* default AtExitCalls, called in reverse order */
  17       _eglUnloadDrivers, /* always called last */
  18       _eglFiniDisplay
  19    },
  20 };
  21
  22
  23 static void
  24 _eglAtExit(void)
  25 {
  26    EGLint i;
  27    for (i = _eglGlobal.NumAtExitCalls - 1; i >= 0; i--)
  28       _eglGlobal.AtExitCalls[i]();
  29 }
  30
  31
  32 void
  33 _eglAddAtExitCall(void (*func)(void))
  34 {
  35    if (func) {
  36       static EGLBoolean registered = EGL_FALSE;
  37
  38       _eglLockMutex(_eglGlobal.Mutex);
  39
  40       if (!registered) {
  41          atexit(_eglAtExit);
  42          registered = EGL_TRUE;
  43       }
  44
  45       assert(_eglGlobal.NumAtExitCalls < ARRAY_SIZE(_eglGlobal.AtExitCalls));
  46       _eglGlobal.AtExitCalls[_eglGlobal.NumAtExitCalls++] = func;
  47
  48       _eglUnlockMutex(_eglGlobal.Mutex);
  49    }
  50 }