[project @ 2002-11-13 12:21:08 by simonmar]

[ghc-hetmet.git] / ghc / rts / Itimer.h

diff --git a/ghc/rts/Itimer.h b/ghc/rts/Itimer.h
index 0876e84..3e41e49 100644 (file)
--- a/ghc/rts/Itimer.h
+++ b/ghc/rts/Itimer.h
@@ -1,15 +1,22 @@
 /* -----------------------------------------------------------------------------
- * $Id: Itimer.h,v 1.3 1999/02/05 16:02:44 simonm Exp $
+ * $Id: Itimer.h,v 1.10 2001/11/27 01:51:23 sof Exp $
  *
- * (c) The GHC Team 1998-1999
+ * (c) The GHC Team 1998-2001
  *
  * Interval timer for profiling and pre-emptive scheduling.
  *
  * ---------------------------------------------------------------------------*/
 
-nat  initialize_virtual_timer  ( nat ms );
-int  install_vtalrm_handler    ( void (*handler)(int) );
+# 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 */
+ 
+int  startVirtTimer( nat ms );
+int  stopVirtTimer ( void );
 void block_vtalrm_signal       ( void );
 void unblock_vtalrm_signal     ( void );
-
-
+unsigned int getourtimeofday   ( void );