| 1 | #ifndef BENCHMARK_TIMERS_H |
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| 2 | #define BENCHMARK_TIMERS_H |
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| 3 | |
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| 4 | #include <chrono> |
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| 5 | #include <string> |
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| 6 | |
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| 7 | namespace benchmark { |
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| 8 | |
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| 9 | // Return the CPU usage of the current process |
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| 10 | double ProcessCPUUsage(); |
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| 11 | |
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| 12 | // Return the CPU usage of the children of the current process |
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| 13 | double ChildrenCPUUsage(); |
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| 14 | |
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| 15 | // Return the CPU usage of the current thread |
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| 16 | double ThreadCPUUsage(); |
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| 17 | |
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| 18 | #if defined(HAVE_STEADY_CLOCK) |
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| 19 | template <bool HighResIsSteady = std::chrono::high_resolution_clock::is_steady> |
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| 20 | struct ChooseSteadyClock { |
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| 21 | typedef std::chrono::high_resolution_clock type; |
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| 22 | }; |
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| 23 | |
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| 24 | template <> |
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| 25 | struct ChooseSteadyClock<false> { |
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| 26 | typedef std::chrono::steady_clock type; |
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| 27 | }; |
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| 28 | #endif |
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| 29 | |
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| 30 | struct ChooseClockType { |
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| 31 | #if defined(HAVE_STEADY_CLOCK) |
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| 32 | typedef ChooseSteadyClock<>::type type; |
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| 33 | #else |
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| 34 | typedef std::chrono::high_resolution_clock type; |
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| 35 | #endif |
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| 36 | }; |
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| 37 | |
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| 38 | inline double ChronoClockNow() { |
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| 39 | typedef ChooseClockType::type ClockType; |
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| 40 | using FpSeconds = std::chrono::duration<double, std::chrono::seconds::period>; |
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| 41 | return FpSeconds(ClockType::now().time_since_epoch()).count(); |
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| 42 | } |
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| 43 | |
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| 44 | std::string LocalDateTimeString(); |
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| 45 | |
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| 46 | } // end namespace benchmark |
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| 47 | |
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| 48 | #endif // BENCHMARK_TIMERS_H |
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| 49 | |
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