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.

1 files changed, 85 insertions, 0 deletions

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 */