EGL_KHR_cl_event2
https://www.khronos.org/registry/egl/specs/eglspec.1.5.pdf
EGL_KHR_cl_event2

	EGL_CL_EVENT_HANDLE_KHR 0x309C
	EGL_SYNC_CL_EVENT_KHR 0x30FE
	EGL_SYNC_CL_EVENT_COMPLETE_KHR 0x30FF
	EGLSyncKHR  eglCreateSync64KHR (EGLDisplay  dpy, EGLenum  type, const EGLAttribKHR * attrib_list)
