-/* Context switch timing constants. Context switches happen after a
- * whole number of ticks, the default being every tick.
- */
-#define CS_MIN_MILLISECS TICK_MILLISECS /* milliseconds per slice */
-
-int startVirtTimer( nat ms );
-int stopVirtTimer ( void );
-void block_vtalrm_signal ( void );
-void unblock_vtalrm_signal ( void );
-unsigned int getourtimeofday ( void );
+extern lnat getourtimeofday ( void );
+#if 0
+/* unused */
+extern void block_vtalrm_signal ( void );
+extern void unblock_vtalrm_signal ( void );
+#endif
+#endif /* __ITIMER_H__ */