#ifndef BENCHMARK_TIMERS_H
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#define BENCHMARK_TIMERS_H
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#include <chrono>
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#include <string>
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namespace benchmark {
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// Return the CPU usage of the current process
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double ProcessCPUUsage();
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// Return the CPU usage of the children of the current process
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double ChildrenCPUUsage();
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// Return the CPU usage of the current thread
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double ThreadCPUUsage();
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#if defined(HAVE_STEADY_CLOCK)
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template <bool HighResIsSteady = std::chrono::high_resolution_clock::is_steady>
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struct ChooseSteadyClock {
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typedef std::chrono::high_resolution_clock type;
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};
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template <>
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struct ChooseSteadyClock<false> {
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typedef std::chrono::steady_clock type;
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};
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#endif
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struct ChooseClockType {
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#if defined(HAVE_STEADY_CLOCK)
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typedef ChooseSteadyClock<>::type type;
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#else
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typedef std::chrono::high_resolution_clock type;
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#endif
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};
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inline double ChronoClockNow() {
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typedef ChooseClockType::type ClockType;
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using FpSeconds = std::chrono::duration<double, std::chrono::seconds::period>;
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return FpSeconds(ClockType::now().time_since_epoch()).count();
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}
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std::string LocalDateTimeString();
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} // end namespace benchmark
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#endif // BENCHMARK_TIMERS_H
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