CarpetLib, CycleClock: Move cycle counting clock into its own thorn

New thorn CycleClock, mostly taken out of CarpetLib. This thorn provides an (almost) cycle-accurate clock, taken from FFTW. This clock is both directly accessible, and is also wrapped in a Cactus clock.

Note: Applying this commit will require adding thorn CycleClock to thorn lists and parameter files.

1 files changed, 32 insertions, 0 deletions

diff --git a/Carpet/CycleClock/src/cycleclock.h b/Carpet/CycleClock/src/cycleclock.h
new file mode 100644
index 000000000..c985609f1
--- /dev/null
+++ b/Carpet/CycleClock/src/cycleclock.h
@@ -0,0 +1,32 @@
+#ifndef CYCLECLOCK_H
+#define CYCLECLOCK_H
+
+/* This defines:
+ *    typedef XXX ticks;
+ *    ticks getticks();
+ *    double elapsed(ticks t1, ticks t0);
+ * Use as:
+ *    #include <cycleclock.h>
+ *    ticks t0 = getticks();
+ *    ...
+ *    ticks t1 = getticks();
+ *    double elapsed_ticks = elapsed(t1, t0);
+ *    double elapsed_seconds = seconds_per_tick() * elapsed_ticks;
+*/
+
+//#include <cctk.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+  
+#include "cycle.h"
+  
+  double seconds_per_tick();
+  void measure_tick();
+  
+#ifdef __cplusplus
+}
+#endif
+
+#endif  /* CYCLECLOCK_H */