GLX_OML_sync_control
http://oss.sgi.com/projects/ogl-sample/registry/OML/glx_sync_control.txt
	Bool glXGetMscRateOML (Display* dpy, GLXDrawable drawable, int32_t* numerator, int32_t* denominator)
	Bool glXGetSyncValuesOML (Display* dpy, GLXDrawable drawable, int64_t* ust, int64_t* msc, int64_t* sbc)
	int64_t glXSwapBuffersMscOML (Display* dpy, GLXDrawable drawable, int64_t target_msc, int64_t divisor, int64_t remainder)
	Bool glXWaitForMscOML (Display* dpy, GLXDrawable drawable, int64_t target_msc, int64_t divisor, int64_t remainder, int64_t* ust, int64_t* msc, int64_t* sbc)
	Bool glXWaitForSbcOML (Display* dpy, GLXDrawable drawable, int64_t target_sbc, int64_t* ust, int64_t* msc, int64_t* sbc)