/* -----------------------------------------------------------------------------
- * $Id: Itimer.h,v 1.3 1999/02/05 16:02:44 simonm Exp $
+ * $Id: Itimer.h,v 1.6 2000/08/03 11:28:35 simonmar Exp $
*
* (c) The GHC Team 1998-1999
*
*
* ---------------------------------------------------------------------------*/
+# define TICK_FREQUENCY 50 /* ticks per second */
+# define TICK_MILLISECS (1000/TICK_FREQUENCY) /* ms per tick */
+
+/* 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 */
+
+extern rtsBool do_prof_ticks; /* profiling ticks on/off */
+
nat initialize_virtual_timer ( nat ms );
-int install_vtalrm_handler ( void (*handler)(int) );
+int install_vtalrm_handler ( void );
void block_vtalrm_signal ( void );
void unblock_vtalrm_signal ( void );
-
-
+unsigned int getourtimeofday ( void );