Android rayshader sample.

samples/android_sample/jni/timer.cc

Index: samples/android_sample/jni/timer.cc
===================================================================
--- samples/android_sample/jni/timer.cc	(revision 0)
+++ samples/android_sample/jni/timer.cc	(revision 0)
@@ -0,0 +1,29 @@
+#include "timer.h"
+#include "bin/log.h"
+
+Timer::Timer() :
+  mElapsed(0.0f),
+  mLastTime(0.0) {
+}
+
+void Timer::reset() {
+  mElapsed = 0.0f;
+  mLastTime = now();
+}
+
+void Timer::update() {
+  double current = now();
+  mElapsed = (current - mLastTime);
+  mLastTime = current;
+}
+
+double Timer::now() {
+  timespec timeval;
+  clock_gettime(CLOCK_MONOTONIC, &timeval);
+  return timeval.tv_sec + (timeval.tv_nsec * 1.0e-9);
+}
+
+float Timer::elapsed() {
+  return mElapsed;
+}
+