From 0065d5ab628975892cea1ec7303f968c3338cbe1 Mon Sep 17 00:00:00 2001
From: Simon Marlow <simonmar@microsoft.com>
Date: Fri, 7 Apr 2006 02:05:11 +0000
Subject: Reorganisation of the source tree Most of the other users of the
 fptools build system have migrated to Cabal, and with the move to darcs we
 can now flatten the source tree without losing history, so here goes.

The main change is that the ghc/ subdir is gone, and most of what it
contained is now at the top level.  The build system now makes no
pretense at being multi-project, it is just the GHC build system.

No doubt this will break many things, and there will be a period of
instability while we fix the dependencies.  A straightforward build
should work, but I haven't yet fixed binary/source distributions.
Changes to the Building Guide will follow, too.
---
 rts/Proftimer.c | 85 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100644 rts/Proftimer.c

(limited to 'rts/Proftimer.c')

diff --git a/rts/Proftimer.c b/rts/Proftimer.c
new file mode 100644
index 0000000000..3b499152d6
--- /dev/null
+++ b/rts/Proftimer.c
@@ -0,0 +1,85 @@
+/* -----------------------------------------------------------------------------
+ *
+ * (c) The GHC Team, 1998-1999
+ *
+ * Profiling interval timer
+ *
+ * ---------------------------------------------------------------------------*/
+
+#if defined (PROFILING)
+
+#include "PosixSource.h"
+
+#include "Rts.h"
+#include "Profiling.h"
+#include "Timer.h"
+#include "Proftimer.h"
+#include "RtsFlags.h"
+
+static rtsBool do_prof_ticks = rtsFalse;       // enable profiling ticks
+static rtsBool do_heap_prof_ticks = rtsFalse;  // enable heap profiling ticks
+
+// Number of ticks until next heap census
+static int ticks_to_heap_profile;
+
+// Time for a heap profile on the next context switch
+rtsBool performHeapProfile;
+
+void
+stopProfTimer( void )
+{
+    do_prof_ticks = rtsFalse;
+}
+
+void
+startProfTimer( void )
+{
+    do_prof_ticks = rtsTrue;
+}
+
+void
+stopHeapProfTimer( void )
+{
+    do_heap_prof_ticks = rtsFalse;
+}
+
+void
+startHeapProfTimer( void )
+{
+    if (RtsFlags.ProfFlags.doHeapProfile && 
+	RtsFlags.ProfFlags.profileIntervalTicks > 0) {
+	do_heap_prof_ticks = rtsTrue;
+    }
+}
+
+void
+initProfTimer( void )
+{
+    performHeapProfile = rtsFalse;
+
+    RtsFlags.ProfFlags.profileIntervalTicks = 
+	RtsFlags.ProfFlags.profileInterval / TICK_MILLISECS;
+
+    ticks_to_heap_profile = RtsFlags.ProfFlags.profileIntervalTicks;
+
+    startHeapProfTimer();
+}
+
+
+void
+handleProfTick(void)
+{
+    if (do_prof_ticks) {
+	CCCS->time_ticks++;
+    }
+
+    if (do_heap_prof_ticks) {
+	ticks_to_heap_profile--;
+	if (ticks_to_heap_profile <= 0) {
+	    ticks_to_heap_profile = RtsFlags.ProfFlags.profileIntervalTicks;
+	    performHeapProfile = rtsTrue;
+	}
+    }
+}
+
+#endif /* PROFILING */
-- 
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