1 #ifndef BENCHMARK_TIMERS_H
2 #define BENCHMARK_TIMERS_H
9 // Return the CPU usage of the current process
10 double ProcessCPUUsage();
12 // Return the CPU usage of the children of the current process
13 double ChildrenCPUUsage();
15 // Return the CPU usage of the current thread
16 double ThreadCPUUsage();
18 #if defined(HAVE_STEADY_CLOCK)
19 template <bool HighResIsSteady = std::chrono::high_resolution_clock::is_steady>
20 struct ChooseSteadyClock {
21 typedef std::chrono::high_resolution_clock type;
25 struct ChooseSteadyClock<false> {
26 typedef std::chrono::steady_clock type;
30 struct ChooseClockType {
31 #if defined(HAVE_STEADY_CLOCK)
32 typedef ChooseSteadyClock<>::type type;
34 typedef std::chrono::high_resolution_clock type;
38 inline double ChronoClockNow() {
39 typedef ChooseClockType::type ClockType;
40 using FpSeconds = std::chrono::duration<double, std::chrono::seconds::period>;
41 return FpSeconds(ClockType::now().time_since_epoch()).count();
44 std::string LocalDateTimeString();
46 } // end namespace benchmark
48 #endif // BENCHMARK_TIMERS_H