DRI2WaitMSC(Display *dpy, XID drawable, CARD64 target_msc, CARD64 divisor,
CARD64 remainder, CARD64 *ust, CARD64 *msc, CARD64 *sbc);
-extern Bool
-DRI2WaitSBC(Display *dpy, XID drawable, CARD64 target_sbc, CARD64 *ust,
- CARD64 *msc, CARD64 *sbc);
-
extern void
DRI2SwapInterval(Display *dpy, XID drawable, int interval);