src/egl/main/eglglobals.c

   1 #include <stdlib.h>
   2 #include <assert.h>
   3 #include "eglglobals.h"
   4 #include "egldriver.h"
   5 #include "egllog.h"
   6 #include "eglmutex.h"
   7
   8
   9 #define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
  10
  11
  12 static _EGL_DECLARE_MUTEX(_eglGlobalMutex);
  13 struct _egl_global _eglGlobal =
  14 {
  15    &_eglGlobalMutex,       /* Mutex */
  16    1,                      /* FreeScreenHandle */
  17    0x0,                    /* ClientAPIsMask */
  18    0,                      /* NumDrivers */
  19    { NULL },               /* Drivers */
  20    1,                      /* NumAtExitCalls */
  21    {                       /* AtExitCalls */
  22       _eglUnloadDrivers
  23    },
  24 };
  25
  26
  27 static void
  28 _eglAtExit(void)
  29 {
  30    EGLint i;
  31    for (i = _eglGlobal.NumAtExitCalls - 1; i >= 0; i--)
  32       _eglGlobal.AtExitCalls[i]();
  33 }
  34
  35
  36 void
  37 _eglAddAtExitCall(void (*func)(void))
  38 {
  39    if (func) {
  40       static EGLBoolean registered = EGL_FALSE;
  41
  42       _eglLockMutex(_eglGlobal.Mutex);
  43
  44       if (!registered) {
  45          atexit(_eglAtExit);
  46          registered = EGL_TRUE;
  47       }
  48
  49       assert(_eglGlobal.NumAtExitCalls < ARRAY_SIZE(_eglGlobal.AtExitCalls));
  50       _eglGlobal.AtExitCalls[_eglGlobal.NumAtExitCalls++] = func;
  51
  52       _eglUnlockMutex(_eglGlobal.Mutex);
  53    }
  54 }