Enable UseRealTime and fix documentation for SetLabel.

Fixes #89

UseRealTime was defined in the internal namespace by mistake.
Similarly, documentation suggested that benchmark::SetLabel should be
used to set a label, and a function was declared but not defined, while
actually the call should be 'state.SetLabel'.

1 files changed, 11 insertions, 0 deletions

diff --git a/test/benchmark_test.cc b/test/benchmark_test.cc
index ec49fcd..2ce1001 100644
--- a/test/benchmark_test.cc
+++ b/test/benchmark_test.cc
@@ -57,6 +57,17 @@ static void BM_Factorial(benchmark::State& state) {
 }
 BENCHMARK(BM_Factorial);
 
+static void BM_FactorialRealTime(benchmark::State& state) {
+  benchmark::UseRealTime();
+
+  int fac_42 = 0;
+  while (state.KeepRunning())
+    fac_42 = Factorial(8);
+  // Prevent compiler optimizations
+  std::cout << fac_42;
+}
+BENCHMARK(BM_FactorialRealTime);
+
 static void BM_CalculatePiRange(benchmark::State& state) {
   double pi = 0.0;
   while (state.KeepRunning())