1 files changed, 53 insertions, 0 deletions
diff --git a/src/egl/main/eglglobals.c b/src/egl/main/eglglobals.c
new file mode 100644
index 0000000000..e63819e08a
--- /dev/null
+++ b/src/egl/main/eglglobals.c
@@ -0,0 +1,53 @@
+#include <stdlib.h>
+#include <assert.h>
+#include "eglglobals.h"
+#include "egldisplay.h"
+#include "egldriver.h"
+#include "eglmutex.h"
+
+
+static _EGL_DECLARE_MUTEX(_eglGlobalMutex);
+struct _egl_global _eglGlobal =
+{
+   &_eglGlobalMutex,       /* Mutex */
+   NULL,                   /* DisplayList */
+   1,                      /* FreeScreenHandle */
+   0,                      /* NumDrivers */
+   { NULL },               /* Drivers */
+   2,                      /* NumAtExitCalls */
+   {
+      /* default AtExitCalls, called in reverse order */
+      _eglUnloadDrivers, /* always called last */
+      _eglFiniDisplay
+   },
+};
+
+
+static void
+_eglAtExit(void)
+{
+   EGLint i;
+   for (i = _eglGlobal.NumAtExitCalls - 1; i >= 0; i--)
+      _eglGlobal.AtExitCalls[i]();
+}
+
+
+void
+_eglAddAtExitCall(void (*func)(void))
+{
+   if (func) {
+      static EGLBoolean registered = EGL_FALSE;
+
+      _eglLockMutex(_eglGlobal.Mutex);
+
+      if (!registered) {
+         atexit(_eglAtExit);
+         registered = EGL_TRUE;
+      }
+
+      assert(_eglGlobal.NumAtExitCalls < ARRAY_SIZE(_eglGlobal.AtExitCalls));
+      _eglGlobal.AtExitCalls[_eglGlobal.NumAtExitCalls++] = func;
+
+      _eglUnlockMutex(_eglGlobal.Mutex);
+   }
+}