1 files changed, 63 insertions, 0 deletions
diff --git a/src/c/jerasure/src/timing.c b/src/c/jerasure/src/timing.c
new file mode 100644
index 0000000..315870a
--- /dev/null
+++ b/src/c/jerasure/src/timing.c
@@ -0,0 +1,63 @@
+// Timing measurement utilities implementation.
+
+#include "timing.h"
+#include <stddef.h>
+
+void
+timing_set(
+  struct timing * t)
+{
+#ifdef USE_CLOCK
+  t->clock = clock();
+#else
+  gettimeofday(&t->tv, NULL);
+#endif
+}
+
+double
+timing_get(
+  struct timing * t)
+{
+#ifdef USE_CLOCK
+  // The clock_t type is an "arithmetic type", which could be
+  // integral, double, long double, or others.
+  //
+  // Add 0.0 to make it a double or long double, then divide (in
+  // double or long double), then convert to double for our purposes.
+  return (double) ((t->clock + 0.0) / CLOCKS_PER_SEC);
+#else
+  return (double) t->tv.tv_sec + ((double) t->tv.tv_usec) / 1000000.0;
+#endif
+}
+
+double
+timing_now()
+{
+#ifdef USE_CLOCK
+  return (double) ((clock() + 0.0) / CLOCKS_PER_SEC);
+#else
+  struct timeval tv;
+  gettimeofday(&tv, NULL);
+  return (double) tv.tv_sec + ((double) tv.tv_usec) / 1000000.0;
+#endif
+}
+
+double
+timing_delta(
+  struct timing * t1,
+  struct timing * t2)
+{
+#ifdef USE_CLOCK
+  // The clock_t type is an "arithmetic type", which could be
+  // integral, double, long double, or others.
+  //
+  // Subtract first, resulting in another clock_t, then add 0.0 to
+  // make it a double or long double, then divide (in double or long
+  // double), then convert to double for our purposes.
+  return (double) (((t2->clock - t1->clock) + 0.0) / CLOCKS_PER_SEC);
+#else
+  double const d2 = (double) t2->tv.tv_sec + ((double) t2->tv.tv_usec) / 1000000.0;
+  double const d1 = (double) t1->tv.tv_sec + ((double) t1->tv.tv_usec) / 1000000.0;
+  return d2 - d1;
+#endif
+}