utils/benchmark/test/cxx03_test.cc

   1 #undef NDEBUG
   2 #include <cassert>
   3 #include <cstddef>
   4
   5 #include "benchmark/benchmark.h"
   6
   7 #if __cplusplus >= 201103L
   8 #error C++11 or greater detected. Should be C++03.
   9 #endif
  10
  11 #ifdef BENCHMARK_HAS_CXX11
  12 #error C++11 or greater detected by the library. BENCHMARK_HAS_CXX11 is defined.
  13 #endif
  14
  15 void BM_empty(benchmark::State& state) {
  16   while (state.KeepRunning()) {
  17     volatile std::size_t x = state.iterations();
  18     ((void)x);
  19   }
  20 }
  21 BENCHMARK(BM_empty);
  22
  23 // The new C++11 interface for args/ranges requires initializer list support.
  24 // Therefore we provide the old interface to support C++03.
  25 void BM_old_arg_range_interface(benchmark::State& state) {
  26   assert((state.range(0) == 1 && state.range(1) == 2) ||
  27          (state.range(0) == 5 && state.range(1) == 6));
  28   while (state.KeepRunning()) {
  29   }
  30 }
  31 BENCHMARK(BM_old_arg_range_interface)->ArgPair(1, 2)->RangePair(5, 5, 6, 6);
  32
  33 template <class T, class U>
  34 void BM_template2(benchmark::State& state) {
  35   BM_empty(state);
  36 }
  37 BENCHMARK_TEMPLATE2(BM_template2, int, long);
  38
  39 template <class T>
  40 void BM_template1(benchmark::State& state) {
  41   BM_empty(state);
  42 }
  43 BENCHMARK_TEMPLATE(BM_template1, long);
  44 BENCHMARK_TEMPLATE1(BM_template1, int);
  45
  46 template <class T>
  47 struct BM_Fixture : public ::benchmark::Fixture {
  48 };
  49
  50 BENCHMARK_TEMPLATE_F(BM_Fixture, BM_template1, long)(benchmark::State& state) {
  51   BM_empty(state);
  52 }
  53 BENCHMARK_TEMPLATE1_F(BM_Fixture, BM_template2, int)(benchmark::State& state) {
  54   BM_empty(state);
  55 }
  56
  57 void BM_counters(benchmark::State& state) {
  58     BM_empty(state);
  59     state.counters["Foo"] = 2;
  60 }
  61 BENCHMARK(BM_counters);
  62
  63 BENCHMARK_MAIN();